Handling of the shifting gear of the forklift transmission and improvement of the fork lever


Handling of the shifting gear of the forklift transmission and improvement of the fork lever 144 Working machine for lungs M and maintenance â–¡ Zhang Yuan Gaoqing Xue CPC2.5 type forklift transmission is a three-axis parallel, manual constant meshing sliding fork shifting structure, with two Forward gear and two reverse gears. The length of the direction gear and the speed shifting fork are different, but the structure is exactly the same. When changing direction or speed, the driver escapes the shift lever and pushes the fork lever to drive the fork to achieve the purpose of changing direction or speed. This type of transmission is also used on forklifts such as CPC2, CPQ2, and CPQ2.5.
The exhaust groove on the transmission fork lever is sometimes misplaced or inexperienced by the assembler, and the position of the exhaust cross is misplaced. As a result, the fork rod exhaust groove is damaged, causing the transmission to be blocked. There have been too many such incidents, some of which were shortly after the factory, and some were shortly after the repair. Moreover, the time and symptoms of the malfunction may vary depending on the road on which the forklift travels.
An example is as follows.
In the 1980s, after a Chongqing-based CPC2.5 forklift was used in Dalian for more than half a month, the forklift transmission had a fault that sometimes went off when moving forward. At the same time, the road on which the forklift travels is sometimes steep. After less than two days of the malfunction of the shifting gear, the forward gear of the forklift can no longer be hanged, and the car will be blocked as soon as it advances. Only the person pushing this forward gear can't lose it, but the transmission will make an abnormal noise, and the pusher feels very hard. At that time, the maintenance personnel hung the gear, replaced the steel ball used for the fixed gear with the ball-end cylindrical pin, and the positioning spring was replaced with a larger elastic force, but the results were not effective and the fault remained. When I was in Dalian, I was entrusted by the forklift factory. After I went to the scene to inquire about the fault and watched the driver's actual operation, it was determined that the forward shift fork lever was in the position of the positioning slot near the transmission set screw. Acted. Inspection method: If the transmission is disassembled, it is laborious and requires a lot of work. Therefore, the following inspection and analysis: first remove the positioning screw of the forward and reverse gears of the transmission, take out the compression spring (the spring has no elastic force and is pressed once a circle), and then use the butter to stick the ball head pin (previously The repairer replaced the person; then use a piece of wire about 3mm to insert into the positioning hole to hold the fork lever, and move the shift lever to move the fork lever to the left or right (see), to observe whether the depth of the wire insertion is changed. If there is a change, the positioning 榷 on the fork lever is not damaged. If there is no change, the positioning on the fork lever has been worn out, so the forward gear can no longer be hung up. It should be repaired or replaced. After the use of the CPC2 forklift, the failure of the transmission forward gear was also observed. Why did it happen after one year of use? One of the reasons is that the roads in the factory are in good condition. The method for checking the cause of the analysis is the same as in Example I. The fork lever positioning groove is worn out, and the fork lever must be adjusted. Loosen the transmission cover, loosen the fastening screw of the fixed fork lever (first remove the anti-loose device) and back a few buckles, remove the shift lever of the forward and reverse gears, and find that the positioning of the fork lever is not too serious. Rotate the fork lever 180* in the original position. At the same time, take care to replace the ball pin that was previously replaced with the original steel ball and replace the spring with the original spring. All the originals are installed as they are.
In less than half an hour, everything was fixed. At this time, the driver did not believe that the fault had been eliminated, so he was reluctant to drive the vehicle to verify it. However, the test proved that the steepest slope in the factory was selected. Off the block.
How is this going, this is to talk about the construction of the forklift lever of the CPC2.5 forklift.
As shown, the left end of the fork lever is connected to the shift lever, and the right end is the three ring-shaped horizontal sides for fixing the fork position when the gear is engaged. The bottom surface of the long groove on the side is at an angle of 90* with the /i surface. They form a cylindrical closed space (see, the space is filled with air and lubricating oil). If the fork lever is pushed to the right at this time, and there is no exhaust passage on the fork lever, the movement of the fork lever will be pushed by the resistance of oil and gas, so the transmission gear will not be able to hang. . To this end, a long groove for exhausting must be opened at the right end of the fork lever so that the fork lever can be smoothly moved to the right. When the through hole is connected with the shift lever, the M can be installed horizontally or downwardly. As a function of ventilation, it can be seen that the fork rod exhaust has two correct mounting positions. However, if the exhaust side is installed at 90° to the /1 side, the exhaust enthalpy also has two mounting positions. First, the angle between the upwardly mounted venting groove and the shifting rod positioning hole on the transmission case is zero degrees. In the same direction, at this time, the positioning steel ball will flatten the three annular positioning grooves on the fork rod in the direction of the exhaust groove in a short time under the action of the spring pressure, so that the three rings are positioned in the axial direction. Grinding, can not be used for positioning, especially on roads with more slopes and steep slopes, the wear will be faster, and then the transmission is out of gear failure as described at the beginning of this article, it can be seen that the upward installation is wrong. Second, the downwardly installed venting groove and the positioning hole are at an angle of 180°, so that the installation can be ventilated, so that the fork venting groove only has this correct mounting position. If the exhaust shovel is installed upwards, the treatment method is: when the yoke rod positioning groove is not seriously worn, the fork lever is rotated by 180°, so that the positioning steel ball is away from the exhaust raft, and the positioning of the gear can be restored. Normal; if the fork lever wears more seriously, or causes bending deformation during the disassembly process, or the through hole of the left end connecting the shift lever is severely worn, the fork lever needs to be replaced.
There are two ways to replace the new fork lever: First, purchase the accessories as they are (note that the speed gear is different from the shift lever of the direction block); the second is to make the bicycle as it is. The method of processing the exhaust boring on the fork lever is: the conditional place can be processed by the milling machine, and the newly processed exhaust boring position is at an angle of 90* to the original position downward (see), and is arranged at the time of installation. The position of the air groove is downward, so the difference between the exhaust and the positioning hole is 180*, there is no problem of coincidence; when there is no milling machine, the problem of exhausting can be solved by drilling the vent hole (see), the depth of the center hole must be greater than the dialing The maximum depth of the fork rod inserted into the hole of the transmission case, but the center hole is slender and difficult to add. Germany Optimas company is the world's international manufacturer of professional floor tile paving equipment. Optimas professional floor tile paving equipment is widely used in large stadiums, squares and ports. Containers, airports, heavy industrial roads and passenger distribution centers, roadways in municipal works, pavements such as pavements, and the laying of highway curbs. The laying task of 1 can be completed in 8 hours.
Work, low efficiency, - if the small hole is blocked, there will be a failure to hang up; there is also a way to open the exhaust 榷 on the fork lever, but to open a hole in the hole of the fork Exhaust vent, but the position of the venting groove must be removed from the transmission's set screw (see), use

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