Operating device suitable for gear shifting of transmission main box in gear auxiliary box

By designing a simulated shift device, the problem that the sub-box synchronizer of heavy-duty transmission for commercial vehicles cannot be detected in time during the life test, and the efficient life test and normal shift of the sub-box synchronizer are realized, avoiding the problem of air intake cut-off of the sub-box caused by the main box gear shift.

CN223120589UActive Publication Date: 2025-07-18SHAANXI FAST AUTO DRIVE GRP CO LTD
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Patent Information

Application Number
CN202422333826.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-24
Publication Date
2025-07-18
Estimated Expiration
2034-09-24

AI Technical Summary

Technical Problem

In the prior art, during the synchronizer life test of heavy-duty transmissions for commercial vehicles, the secondary box synchronizer cannot detect the failed position and mode in time, and the main box is hung in a certain gear, causing the main air intake of the secondary box to be switched off and the gears cannot be shifted normally.

Method used

A control device suitable for shifting gears in the gear and sub-box of the main box of the transmission is designed, including an analog shift shaft, an analog shift shift head, an analog control cover and an analog air path control valve. By cooperating with the groove of the simulated air path control valve, the air path is turned on and off control is achieved, ensuring the normal supply and cut-off of the air intake of the sub-box.

Benefits of technology

It realizes the shift performance and life test under the large inertia of the secondary box synchronizer when the main box of the transmission is fixed in the gear, breaking through the defects of long test cycles, high cost and difficult failure, and can promptly discover the synchronizer failure position and mode.

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Abstract

The utility model discloses an operating device suitable for gear shifting of a transmission main box in a gear auxiliary box. The operating device comprises a simulation gear shifting shaft, a simulation gear shifting block, a simulation operating cover and a simulation gas circuit control valve. The simulation control cover can be installed on the control assembly. The simulation gear shifting shaft penetrates through the two side walls of the simulation control cover, and the simulation gear shifting block is located in the simulation control cover and fixed to the simulation gear shifting shaft so that the simulation gear shifting block can synchronously rotate during gear shifting. A simulation gas circuit control valve is installed on the front wall of the simulation control cover, and an ejector rod at one end of the simulation gas circuit control valve extends into the simulation control cover and is matched with a groove of the simulation gear shifting block. According to the utility model, the main box of the transmission is fixed at a certain gear on the test bench, and the auxiliary box normally switches the gear at the same time, so that the gear shifting performance and service life test of the synchronizer of the auxiliary box under large inertia can be realized, and especially, the defects of long period, high cost and difficulty in failure of conventional gear shifting can be overcome in the service life test.
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Description

Technical Field

[0001] The utility model relates to a control device suitable for the shift of the auxiliary box when the main box of a transmission is in gear. Background Art

[0002] Commercial vehicle heavy-duty transmissions usually adopt a structure of a main box plus an auxiliary box. In the synchronous life test of the auxiliary box synchronizer, the test of the auxiliary box synchronizer usually adopts the method of shifting gears with the main box in neutral. Currently, according to the conventional standard test, the auxiliary box synchronizer cannot reach failure within 100,000 shift times, and the failure position and failure mode of the synchronizer cannot be clearly and timely detected. In order to measure the failure position and failure mode of the synchronizer, designers usually test by hanging the main box in a certain gear to increase the synchronous inertia when the auxiliary box synchronizer shifts gears. After increasing the synchronous inertia, the test conditions of the auxiliary box synchronizer are more severe, so that the synchronizer can fail faster. However, for most transmissions, the problem caused by hanging the main box in a certain gear is that the main air intake for the auxiliary box shift is cut off by the control, resulting in the inability of the auxiliary box to shift gears normally. Content of the Utility Model

[0003] Aiming at the deficiencies existing in the prior art, the purpose of the utility model is to provide a control device suitable for the shift of the auxiliary box when the main box of a transmission is in gear. This device can avoid the situation where the main air intake for the auxiliary box shift is cut off when the main box is in gear. Installing the valve for controlling the air intake of the auxiliary box of the transmission on this device can simulate the air circuit state during the shift of the auxiliary box, that is, it can simultaneously achieve the test state of the main box of the transmission being in gear and the normal shift of the auxiliary box.

[0004] In order to solve the above technical problems, the utility model is realized by adopting the following technical solutions:

[0005] A control device suitable for the shift of the auxiliary box when the main box of a transmission is in gear includes a simulated shift shaft, a simulated shift lever head, a simulated control cover, and a simulated air circuit control valve;

[0006] The simulated control cover can be installed on the control assembly; the simulated shift shaft penetrates through both side walls of the simulated control cover, and the simulated shift lever head is located inside the simulated control cover and fixed to the simulated shift shaft so as to rotate synchronously during shifting; a simulated air circuit control valve is installed on the front wall of the simulated control cover, and one end of the ejector rod of this simulated air circuit control valve extends into the simulated control cover and cooperates with the groove of the simulated shift lever head.

[0007] The utility model further includes the following technical features:

[0008] Specifically, the simulated shift lever head is sleeved on the simulated shift shaft, and the simulated shift shaft and the simulated shift lever head are fixed by a positioning locking screw.

[0009] Specifically, the simulated shift knob and the simulated shift shaft are provided with vertically penetrating holes, so that after the positioning locking screw passes through, the two are fixed.

[0010] Specifically, the simulated shift knob is provided with a horizontal central through hole for the simulated shift shaft to pass through. The top and bottom of the simulated shift knob are flat surfaces, the side part is a shift knob protrusion, and the middle part of the shift knob protrusion is the groove.

[0011] Specifically, two limit bolts are installed on the top of the simulated control cover. The two limit bolts extend into the simulated control cover and are close to the top of the simulated shift knob to limit the rotation amplitude of the simulated shift knob.

[0012] Specifically, when the simulated shift knob rotates and swings to the limit position, the ejector rod of the air path control valve disengages from the groove position of the simulated shift knob. At this time, the internal air path of the air path control valve is switched, and the intake of the auxiliary box is cut off; when the simulated shift knob rotates and swings back to the reset position and the ejector rod of the air path control valve returns from the gear position to the neutral gear groove position again, the air path of the air path control valve changes, the intake of the auxiliary box is opened, and at the same time, the auxiliary box starts to shift gears.

[0013] Specifically, oil seals, copper sleeves and retaining rings are provided at the axially mating parts of the two side walls of the simulated shift shaft and the simulated control cover to ensure the sealing function of the simulation operation.

[0014] Specifically, the simulated control cover is a box structure with an open bottom.

[0015] Specifically, the control assembly includes a horizontal shift lever, a shift knob and an air path control valve.

[0016] Compared with the prior art, the utility model has the following technical effects:

[0017] The utility model realizes the normal gear shifting of the auxiliary box while the main box of the transmission is fixed in a certain gear on the test bench, and further realizes the shifting performance and life test of the auxiliary box synchronizer under large inertia, especially in the life test, it can break through the defects of long conventional shifting cycle, high cost and difficult failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structural schematic diagram of the device of the utility model installed on the control assembly.

[0019] Figure 2 is the horizontal cross-sectional view of the device of the utility model.

[0020] Figure 3 is the longitudinal cross-sectional view of the device of the utility model.

[0021] Figure 4 is the schematic diagram of the simulated control cover.

[0022] Figure 5 Schematic diagram of the simulated shift lever

[0023] Figure 6 Schematic diagram of the simulated shift shaft

[0024] The meanings of the various labels in the figure are as follows:

[0025] 11. Simulated shift shaft, 12. Simulated shift lever, 13. Simulated control cover, 14. Simulated air path control valve, 15. Locking screw with positioning, 16. Limit bolt, 17. Oil seal, 18. Copper bushing, 19. Retaining ring, 10. Control assembly, 101. Lateral shift lever, 102. Shift lever, 103. Air path control valve. Specific implementation mode

[0026] The utility model provides a control device suitable for the shift of the auxiliary box when the main box of the transmission is in gear, which can realize the normal shift of the auxiliary box while the main box of the transmission is fixed in a certain gear on the test bench, so as to realize the shift performance and life test of the auxiliary box synchronizer under large inertia, especially in the life test, the defects of long conventional shift cycle, high cost and difficult failure can be overcome. The overall installation structure is as Figure 1 shown. The characteristics and functions of this device are as follows:

[0027] Shift process before the test without using this device: The shift manipulator is installed at the lateral shift lever of the control assembly. When in neutral, the shift lever is in the middle position. At this time, the air path control valve allows compressed air to enter the auxiliary box cylinder for auxiliary box shifting. When the shift manipulator drives the lateral shift lever to shift to both sides, the shift lever swings accordingly, and the spool inside the air path control valve moves. When in gear, the compressed air is cut off, and at this time, the compressed gas can no longer enter the auxiliary box cylinder for auxiliary box shifting.

[0028] The simulated control device is installed on the upper part of the control assembly. During actual operation, the simulated control device replaces some functions of the control assembly. The shift manipulator is installed at the simulated lateral shift lever (two places on both sides). The simulated air path control valve is also installed on the side of the simulated control device. The air path of the auxiliary box of the transmission is connected to the simulated control device. The control assembly hangs the transmission in a certain gear. At this time, it can realize that while the main box of the transmission is fixed in a certain gear, the air path of the auxiliary box can be normally shifted.

[0029] Main characteristics of the simulated control device: The simulated shift shaft and the simulated shift lever are fixed by locking screws with positioning, and rotate synchronously during shifting, so as to realize the on-off of the air path of the simulated air path control valve on the side of the simulated control device; Two limit bolts are installed on the simulated control cover to realize the limit of the rotation of both sides of the simulated shift lever; Oil seals, copper bushings and retaining rings are arranged at the axial matching part of the simulated shift shaft and the simulated control cover to ensure the sealing function of the simulated control.

[0030] Specific embodiments of the present utility model are given below. It should be noted that the present utility model is not limited to the following specific embodiments, and all equivalent transformations made on the basis of the technical solutions of this application fall within the protection scope of the present utility model.

[0031] Embodiment:

[0032] As Figures 1 to 6 shown, this embodiment provides a control device suitable for the shift of the auxiliary box when the main box of the transmission is in gear, including a simulated shift shaft 11, a simulated shift head 12, a simulated control cover 13, and a simulated air circuit control valve 14.

[0033] The simulated control cover 13 can be installed on the control assembly 10 and is located above the shift head of the control assembly; the simulated shift shaft 11 penetrates through both side walls of the simulated control cover 13, and the simulated shift head 12 is located inside the simulated control cover 13 and is fixed to the simulated shift shaft 11 so as to rotate synchronously during shifting, thereby realizing the on-off of the air circuit of the air circuit control valve on the side of the simulated control device; the simulated air circuit control valve 14 is installed on the front wall of the simulated control cover 13, and the ejector rod at one end of the simulated air circuit control valve 14 extends into the simulated control cover 13 and cooperates with the groove of the simulated shift head 12.

[0034] The simulated shift head 12 is sleeved on the simulated shift shaft 11, and the simulated shift shaft 11 and the simulated shift head 12 are fixed by a positioning locking screw 15.

[0035] The simulated shift head 12 and the simulated shift shaft 11 are provided with vertically penetrating holes so that the positioning locking screw 15 passes through and fixes the two.

[0036] The simulated shift head 12 is provided with a horizontal central through hole for the simulated shift shaft 11 to pass through. The top and bottom of the simulated shift head 12 are flat, the side part is a shift head protrusion, and the middle part of the shift head protrusion is a groove.

[0037] Two limit bolts 16 are installed on the top of the simulated control cover 13. The two limit bolts 16 extend into the simulated control cover 13 and are close to the top of the simulated shift head 12 to limit the rotation amplitude of the simulated shift head 12.

[0038] When the shift manipulator pushes the simulated shift shaft 11 to shift gears, it drives the simulated shift head 12 to rotate and swing to the limit position. The ejector rod of the simulated air circuit control valve 14 disengages from the groove position of the simulated shift head 12 from the neutral gear to the gear position. At this time, the internal air passage of the simulated air circuit control valve 14 is switched, and the intake of the auxiliary box is cut off; when the shift manipulator drives the simulated shift head 12 to rotate and swing back to the original position, when the ejector rod of the simulated air circuit control valve 14 returns from the gear position to the neutral gear groove position again, the air passage of the simulated air circuit control valve 14 changes, the intake of the auxiliary box is opened, and at the same time the auxiliary box starts to shift gears.

[0039] At the axially mating positions on both sides of the simulated shift shaft 11 and the simulated control cover 13, there are an oil seal 17, a copper bushing 18 and a retaining ring 19 to ensure the sealing function of the simulated control.

[0040] The simulated control cover 13 is a box structure with an open bottom.

[0041] The control assembly includes a lateral shift lever 101, a shift head 102 and a pneumatic control valve 103.

[0042] The operating device suitable for the main box of the transmission to shift gears in the auxiliary box provided by the present utility model simulates the conventional auxiliary box shifting process while ensuring that the main box is in gear. Its working process is as follows:

[0043] (1) According to the assembly schematic diagram, the simulated shift shaft, the simulated shift head (designed with a groove at the mating position with the simulated pneumatic control valve, the same as the actual usage situation), the copper bushing, the retaining ring, and the oil seal are sequentially installed in the simulated control cover, and the shift head is fixed on the simulated shift shaft with a positioning tightening screw;

[0044] (2) Hang the main box of the transmission in a certain gear according to the actual needs, install the operating device of the present utility model, i.e., the simulated control device, on the control assembly, and the mounting hole positions on the simulated control device can match a variety of common operations;

[0045] (3) Connect the shift manipulator to the simulated shift shaft, connect the air circuit on the pneumatic control valve in the conventional operation to the pneumatic control valve on the simulated control device, and adjust the tightening depth of the limit bolt to ensure the correct limit during shifting on both sides;

[0046] (4) When the shift manipulator pushes the simulated shift shaft to shift gears, it drives the simulated shift head to swing to the limit position. The simulated shift head and the ejector rod on the simulated pneumatic control valve are disengaged from the groove position (simulating from neutral to gear). At this time, the internal air passage of the simulated pneumatic control valve is switched, and the air intake of the auxiliary box is cut off. When the shift manipulator drives the simulated shift head to return from the gear to the neutral groove position again, the air passage of the simulated pneumatic control valve changes, the air intake of the auxiliary box is opened, and at the same time, the auxiliary box starts to shift gears.

[0047] Different from the control assembly, when the main box is in a certain gear, the ejector rod of the pneumatic control valve is compressed, and at this time, the air circuit of the auxiliary box is cut off, and the auxiliary box gear cannot be switched. This device can realize that when the main box of the transmission is in a certain gear, the ejector rod of the pneumatic control valve can be extended and retracted through the simulated control device to ensure the normal supply and cut-off of the air intake of the auxiliary box, thereby controlling the shifting of the auxiliary box.

[0048] The preferred embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present utility model, various simple modifications can be made to the technical solution of the present utility model, and these simple modifications all fall within the protection scope of the present utility model.

[0049] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present utility model will not separately describe various possible combination manners.

[0050] Furthermore, any combination can be made among various different embodiments of the present utility model, as long as it does not violate the idea of the present utility model, and it should also be regarded as the content disclosed by the present utility model.

Claims

1. A control device suitable for the shift of the auxiliary box while the main box of the transmission is in gear, characterized in that, It includes a simulated shift shaft (11), a simulated shift lever head (12), a simulated control cover (13) and a simulated air circuit control valve (14); The simulated control cover (13) can be installed on the control assembly (10); the simulated shift shaft (11) penetrates through both side walls of the simulated control cover (13), and the simulated shift lever head (12) is located inside the simulated control cover (13) and fixed to the simulated shift shaft (11) so as to rotate synchronously during shifting; the simulated air circuit control valve (14) is installed on the front wall of the simulated control cover (13), and one end of the push rod of the simulated air circuit control valve (14) extends into the simulated control cover (13) and cooperates with the groove of the simulated shift lever head (12).

2. The operating device suitable for shifting the auxiliary box in gear in the main box of the transmission according to claim 1, characterized in that, The simulated shift lever head (12) is sleeved on the simulated shift shaft (11), and the simulated shift shaft (11) and the simulated shift lever head (12) are fixed by a positioning lock screw (15).

3. The operating device suitable for shifting the auxiliary box while the main box of the transmission is in gear according to claim 2, characterized in that, The simulated shift lever head (12) and the simulated shift shaft (11) are provided with vertically through holes so that the positioning lock screw (15) passes through and fixes the two.

4. The operating device suitable for shifting the auxiliary gearbox in gear in the main gearbox of the transmission according to claim 1, characterized in that, The simulated shift lever head (12) is provided with a horizontal central through hole for the simulated shift shaft (11) to pass through. The top and bottom of the simulated shift lever head (12) are flat surfaces, the side part is a lever head protrusion, and the middle of the lever head protrusion is the groove.

5. The operating device suitable for shifting the auxiliary gearbox in gear in the main gearbox of the transmission according to claim 1, characterized in that, Two limit bolts (16) are installed on the top of the simulated control cover (13), and the two limit bolts (16) extend into the simulated control cover (13) and are close to the top of the simulated shift lever head (12) to limit the rotation range of the simulated shift lever head (12).

6. The operating device suitable for shifting the auxiliary box while the main box of the transmission is in gear as described in claim 5, characterized in that, When the simulated shift lever head (12) rotates and swings to the limit position, the push rod of the simulated air circuit control valve (14) disengages from the groove position of the simulated shift lever head (12). At this time, the internal air passage of the simulated air circuit control valve (14) is switched, and the air intake of the auxiliary box is cut off; when the simulated shift lever head (12) rotates and swings back to the original position and the push rod of the simulated air circuit control valve (14) returns to the neutral gear groove position again, the air passage of the simulated air circuit control valve (14) changes, the air intake of the auxiliary box is opened, and at the same time, the auxiliary box starts to shift gears.

7. The operating device suitable for shifting the auxiliary box while the main box of the transmission is in gear as described in claim 1, characterized in that, Seals (17), copper sleeves (18) and retaining rings (19) are provided at the axial mating positions of the two side walls of the simulated shift shaft (11) and the simulated control cover (13).

8. The operating device suitable for shifting the auxiliary box in gear of the main box of the transmission according to claim 1, characterized in that, The simulated control cover (13) is a box structure with an open bottom.

9. The operating device suitable for shifting the auxiliary box while the main box of the transmission is in gear as claimed in claim 1, characterized in that, The control assembly (10) includes a lateral shift lever (101), a shift lever head (102) and an air circuit control valve (103).