AMT rear auxiliary box middle position limiting device

Abstract

The utility model discloses an AMT rear auxiliary box middle position limiting device which comprises a rear auxiliary box center-returning shaft, one end of the rear auxiliary box center-returning shaft is a rear auxiliary box center-returning shaft head, and the rear auxiliary box center-returning shaft head is used for limiting a rear auxiliary box gear-engaging shaft head in an AMT rear auxiliary box. The rear auxiliary box centering device further comprises a rear auxiliary box centering air cylinder, a rear auxiliary box centering piston is arranged in the rear auxiliary box centering air cylinder, and one side of the rear auxiliary box centering piston is fixedly connected with the other end of the rear auxiliary box centering shaft. According to the device, a limiting device does not need to be designed on the rear auxiliary box gear engaging shaft, neutral gear limiting can be conducted through the rear auxiliary box centering air cylinder, the rear auxiliary box gear engaging executing mechanism is made to return to the middle position, and it is guaranteed that the rear power takeoff can work normally.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gearbox technical field relates to AMT rear sub -box intermediate position, specifically relates to a kind of AMT rear sub -box intermediate position limiting device. BACKGROUND

[0002] With the popularity of domestic commercial vehicle mechanical automatic gearbox (AMT), the system based on AMT greatly reduces the operating strength of the driver, and the AMT adapted vehicle type gradually increases. For the use condition of AMT, various mode power take-off devices need to be matched to meet the diversified use requirements of customers. The power take-off device arrangement of AMT mainly includes bottom power take-off device, side power take-off device and rear power take-off device. Whether the driver needs to activate is confirmed through the key, and the AMT controller determines whether the power take-off work of the gearbox can be performed according to the current working condition of the gearbox.

[0003] The AMT products in the prior art are all designed in an integrated manner. The gear selection and shift execution mechanism (GSU) of the integrated AMT integrates the gearbox controller, the shift execution mechanism, the temperature sensor and the air pressure sensor together, greatly improves the integration degree, effectively reduces the faults of related parts such as air pipe, wire harness, sensor and electromagnetic valve, and improves the stability and comfort of the product.

[0004] The gear selection and shift execution mechanism of the integrated AMT currently adopts the following forms: first, the main gearbox engagement execution mechanism and the main gearbox selection execution mechanism both adopt a three-position air cylinder, i.e. an extended position, a retracted position and an intermediate position; second, the rear sub-gearbox engagement execution mechanism adopts a two-position air cylinder, i.e. the rear sub-gearbox engagement cylinder used only has an extended position and a retracted position, without an intermediate position.

[0005] The power take-off position of the rear power take-off device is the intermediate shaft gear of the rear sub-gearbox. If the rear power take-off device needs to be activated, the rear sub-gearbox engagement execution mechanism needs to be returned to the intermediate position, i.e. the neutral position. SUMMARY

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an AMT rear sub-gearbox intermediate position limiting device to solve the technical problem that the rear sub-gearbox engagement execution mechanism in the prior art adopts a two-position air cylinder without an intermediate position, which cannot activate the rear power take-off device.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions to achieve:

[0008] An AMT rear sub-gearbox intermediate position limiting device, comprising a rear sub-gearbox return shaft, one end of the rear sub-gearbox return shaft is a rear sub-gearbox return shaft head, and the rear sub-gearbox return shaft head is used for limiting the rear sub-gearbox engagement shaft head in the AMT rear sub-gearbox.

[0009] The rear sub-gearbox back-to-middle cylinder is internally provided with a rear sub-gearbox back-to-middle piston, and one side of the rear sub-gearbox back-to-middle piston is fixedly connected with the other end of the rear sub-gearbox back-to-middle shaft.

[0010] The utility model discloses still have following technical features:

[0011] Specifically, one end of the first gas pipe is communicated with the rodless cavity of the rear sub-gearbox back-to-middle cylinder, and the other end of the first gas pipe is communicated with the first gas outlet of the two-position three-way electromagnetic valve.

[0012] Specifically, the rear sub-gearbox gear-engaging cylinder is internally provided with a rear sub-gearbox gear-engaging piston capable of moving left and right, and the rear sub-gearbox gear-engaging piston is fixedly connected with one end of a rear sub-gearbox gear-engaging shaft.

[0013] Preferably, the rear sub-gearbox back-to-middle piston is located at the left end limit stroke state in the rear sub-gearbox back-to-middle cylinder, and the rear sub-gearbox gear-engaging piston is located at the middle position in the rear sub-gearbox gear-engaging cylinder to achieve limiting.

[0014] Preferably, the rear sub-gearbox back-to-middle shaft and the rear sub-gearbox gear-engaging shaft are both horizontally arranged and located on the same horizontal line.

[0015] Preferably, the rear sub-gearbox gear-engaging cylinder is further internally provided with a rear sub-gearbox piston electromagnet capable of moving left and right, and the bottom of the rear sub-gearbox piston electromagnet is fixedly connected with the top of the rear sub-gearbox gear-engaging piston.

[0016] Preferably, the rear sub-gearbox gear-engaging cylinder is further internally provided with a rear sub-gearbox piston displacement sensor along the moving direction of the rear sub-gearbox piston electromagnet, the width of the rear sub-gearbox piston displacement sensor is equal to the width of the rear sub-gearbox gear-engaging cylinder, and the bottom of the rear sub-gearbox piston displacement sensor is in contact with the top of the rear sub-gearbox piston electromagnet.

[0017] Compared with the prior art, the utility model has the following beneficial technical effects:

[0018] (I) The device of the utility model does not need to design a limiting device on the rear sub-gearbox gear-engaging shaft, can limit the empty gear through the rear sub-gearbox back-to-middle cylinder, make the rear sub-gearbox gear-engaging actuator return to the middle position, and ensure that the rear power take-off device can normally work.

[0019] (II) The rear sub-gearbox return middle cylinder in the device is arranged on the rear cover of the gearbox, the rear sub-gearbox return middle piston in the rear sub-gearbox return middle cylinder is connected with the rear sub-gearbox engaging shaft, when power take-off is needed, the rear sub-gearbox return middle cylinder works, the rear sub-gearbox return middle piston drives the rear sub-gearbox engaging shaft to return to the middle position of the rear sub-gearbox engaging cylinder, and the technical problem that the rear sub-gearbox engaging cylinder of the gear shifting execution mechanism of the integrated AMT has no middle position is solved.

[0020] (III) The device can make up for the fact that the gear shifting execution mechanism of the current integrated AMT cannot use the rear power take-off arrangement structure, greatly improves the adaptability of the integrated AMT, and meets the differentiated needs of customers. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structure schematic view of the right side gear of the rear sub-gearbox engaging execution mechanism.

[0022] Figure 2 It is a structure schematic view of the middle gear of the rear sub-gearbox engaging execution mechanism.

[0023] Figure 3 It is a structure schematic view of the left side gear of the rear sub-gearbox engaging execution mechanism.

[0024] The meanings of the various reference numerals in the drawings are as follows: 1 is a rear sub-gearbox engaging cylinder, 2 is a rear sub-gearbox engaging shaft, 3 is a rear sub-gearbox engaging shaft head, 4 is a rear sub-gearbox return middle shaft, 5 is a rear sub-gearbox return middle shaft head, 6 is a rear sub-gearbox return middle cylinder, 7 is a rear sub-gearbox return middle piston, 8 is a first air pipe, 9 is a two-position three-way electromagnetic valve, 10 is a second air pipe, 11 is a high-pressure gas source, 12 is a rear sub-gearbox gear shifting knob, 13 is a synchronizer sleeve, 14 is a rear sub-gearbox driving gear, 15 is a second shaft, 16 is a rear sub-gearbox middle shaft driving gear, 17 is a rear sub-gearbox middle shaft, 18 is a rear sub-gearbox middle shaft gear, 19 is a rear sub-gearbox idle gear, 20 is an output shaft, and 21 is a synchronizer meshing gear ring.

[0025] 101 is a rear sub-gearbox engaging piston, 102 is a rear sub-gearbox piston electromagnet, and 103 is a rear sub-gearbox piston displacement sensor.

[0026] The specific content of the device is further explained and described in detail in combination with the embodiments. DETAILED DESCRIPTION

[0027] It should be noted that all the devices and parts in the device, such as the rear sub-gearbox return middle shaft 4, the shaft head of the rear sub-gearbox return middle shaft 5, the cylinder of the rear sub-gearbox return middle cylinder 6, the piston of the rear sub-gearbox return middle piston 7, and the two-position three-way electromagnetic valve 9, all adopt the devices and parts known in the prior art.

[0028] The rear auxiliary gearbox gear-hanging cylinder 1 refers to a two-position cylinder used by a rear auxiliary gearbox gear-hanging execution mechanism of an integrated AMT gear selection and shifting execution mechanism.

[0029] The following specific embodiments of the present application are given in accordance with the above technical solution, and it should be noted that the present application is not limited to the following specific embodiments, and any equivalent transformation based on the technical solution of the present application falls within the protection scope of the present application.

[0030] Embodiment:

[0031] The present embodiment provides a kind of AMT rear auxiliary gearbox intermediate position limiting device, as shown in Figure Figure 2 The rear auxiliary gearbox gear-hanging cylinder 1 refers to a two-position cylinder used by a rear auxiliary gearbox gear-hanging execution mechanism of an integrated AMT gear selection and shifting execution mechanism.

[0032] Further comprising rear auxiliary gearbox gear-hanging cylinder 1, rear auxiliary gearbox gear-hanging cylinder 1 is provided with rear auxiliary gearbox gear-hanging piston 101 that can move left and right, rear auxiliary gearbox gear-hanging piston 101 is fixedly connected with one end of rear auxiliary gearbox gear-hanging shaft 2, and the other end of rear auxiliary gearbox gear-hanging shaft 2 is rear auxiliary gearbox gear-hanging shaft head 3.

[0033] As a preferred scheme of the present embodiment, one end of the rodless cavity of the rear auxiliary gearbox gear-hanging cylinder 6 is communicated with the first gas pipe 8, the other end of the first gas pipe 8 is communicated with the first gas outlet of the two-position three-way electromagnetic valve 9; the second gas outlet of the two-position three-way electromagnetic valve 9 is communicated with the outside atmosphere; the gas inlet of the two-position three-way electromagnetic valve 9 is communicated with one end of the second gas pipe 10, and the other end of the second gas pipe 10 is communicated with the high-pressure gas source 11. The opening and closing of the inlet and outlet of the two-position three-way electromagnetic valve 9 are controlled by the integrated AMT gear selection and shifting execution mechanism. The high-pressure gas in the high-pressure gas source 11 is controlled by the two-position three-way electromagnetic valve 9 to enter the rear auxiliary gearbox gear-hanging cylinder 6.

[0034] As a preferred scheme of the present embodiment, further comprising rear auxiliary gearbox gear-hanging cylinder 1, rear auxiliary gearbox gear-hanging cylinder 1 is provided with rear auxiliary gearbox gear-hanging piston 101 that can move left and right, rear auxiliary gearbox gear-hanging piston 101 is fixedly connected with one end of rear auxiliary gearbox gear-hanging shaft 2, and the other end of rear auxiliary gearbox gear-hanging shaft 2 is rear auxiliary gearbox gear-hanging shaft head 3.

[0035] As a preferred scheme of the present embodiment, when the rear auxiliary gearbox gear-hanging piston 101 is located at the intermediate position in the rear auxiliary gearbox gear-hanging cylinder 1 to achieve limiting, the rear auxiliary gearbox gear-hanging cylinder 1 is in the left end limit stroke state in the rear auxiliary gearbox gear-hanging cylinder 6.

[0036] As a preferred scheme of the present embodiment, the rear auxiliary gearbox gear-hanging shaft 2 and the rear auxiliary gearbox gear-hanging shaft 2 are both horizontally arranged and located on the same horizontal line.

[0037] As a preferred solution of this embodiment, a rear auxiliary box gear shifting cylinder 1 is also provided with a rear auxiliary box piston electromagnet 102 that can move left and right, and the bottom of the rear auxiliary box piston electromagnet 102 is fixedly connected to the top of the rear auxiliary box gear shifting piston 101.

[0038] As a preferred solution of this embodiment, a rear auxiliary box piston displacement sensor 103 is further disposed within the rear auxiliary box gear engagement cylinder 1, along the direction of movement of the rear auxiliary box piston electromagnet 102. The width of the rear auxiliary box piston displacement sensor 103 is equal to the width of the rear auxiliary box gear engagement cylinder 1, and the bottom of the rear auxiliary box piston displacement sensor 103 contacts the top of the rear auxiliary box piston electromagnet 102. The rear auxiliary box piston displacement sensor 103 is connected to the integrated AMT's gear selection and shift actuator and is used to determine whether the rear auxiliary box gear engagement actuator is in the intermediate position, i.e., the neutral position.

[0039] Before the device of the present invention is used, the rear auxiliary box gear-engaging actuator is in the extended position, that is, the right side is in gear. Figure 1 As shown, when the right side is in gear, the rear auxiliary box gear shift cylinder 1 drives the rear auxiliary box gear shift shaft 2 to move to the right, the rear auxiliary box gear shift shaft 2 drives the rear auxiliary box gear shift head 12 and the rear auxiliary box gear shift shaft head 3 to move to the right, the rear auxiliary box gear shift shaft head 3 pushes the rear auxiliary box return center shaft head 5 to move to the right, the rear auxiliary box return center shaft head 5 drives the rear auxiliary box return center shaft 4 and the rear auxiliary box return center piston 7 to move to the right. The rear auxiliary box return center cylinder 6 is connected to the first air outlet of the two-position three-way solenoid valve 9 through the first air pipe 8. At this time, the air inlet of the two-position three-way solenoid valve 9 is closed, and the high-pressure gas in the two-position three-way solenoid valve 9 is released into the atmosphere through the second air outlet of the two-position three-way solenoid valve 9, that is, the high-pressure gas in the rear auxiliary box return center cylinder 6 is discharged to the atmosphere. At this time, the rear auxiliary box return center piston 7 is located at the rightmost side of the rear auxiliary box return center cylinder 6.

[0040] When the device of the present invention is in use, the rear auxiliary box gear-engaging actuator is in the extended position, that is, the right side is in gear, the integrated AMT gear selection actuator controls the two-position three-way solenoid valve 9 and activates it, the air inlet of the two-position three-way solenoid valve 9 is opened, the second air outlet of the two-position three-way solenoid valve 9 is closed, and the high-pressure gas in the high-pressure gas source 11 enters the two-position three-way solenoid valve 9 through the second air pipe 10 and the air inlet of the two-position three-way solenoid valve 9 in sequence, and then the high-pressure gas in the two-position three-way solenoid valve 9 passes through the second air pipe 10 and the air inlet of the two-position three-way solenoid valve 9 in sequence. The first air outlet of the two-position three-way solenoid valve 9 and the first air pipe 8 enter the rear auxiliary box return cylinder 6. The high-pressure gas in the rear auxiliary box return cylinder 6 pushes the rear auxiliary box return piston 7 to move to the left. The rear auxiliary box return piston 7 drives the rear auxiliary box return shaft 4 to move to the left. The rear auxiliary box return shaft 4 drives the rear auxiliary box return shaft head 5 to move to the left. The rear auxiliary box return shaft head 5 pushes the rear auxiliary box gear shift shaft head 3 to move to the left. The rear auxiliary box gear shift shaft head 3 drives the rear auxiliary box gear shift shaft 2 and the rear auxiliary box shift dial head 12 to move to the left. Figure 2As shown, when the rear sub-gearbox return middle piston 7 reaches the leftmost position in the rear sub-gearbox return middle cylinder 6, the rear sub-gearbox gearshift actuator is in the intermediate position, i.e. in the neutral gear, also known as the idle gear position. After the rear sub-gearbox gearshift actuator is in the idle gear position, the integrated AMT gearshift actuator controls the two-position three-way electromagnetic valve 9, and closes the first outlet of the two-position three-way electromagnetic valve 9, the second outlet of the two-position three-way electromagnetic valve 9 and the inlet of the two-position three-way electromagnetic valve 9, so that the rear sub-gearbox return middle piston 7 remains in the leftmost position in the rear sub-gearbox return middle cylinder 6, and the power take-off can perform power take-off work.

[0041] As shown, when the rear sub-gearbox gearshift piston 101 in the rear sub-gearbox gearshift cylinder 1 drives the rear sub-gearbox gearshift shaft 2 to move to the left, the rear sub-gearbox gearshift shaft 2 drives the rear sub-gearbox gearshift yoke 12 and the rear sub-gearbox gearshift shaft head 3 to move to the left, at this time, the rear sub-gearbox gearshift shaft head 3 and the rear sub-gearbox return middle shaft head 5 are disengaged. Figure 3 As shown, when the rear sub-gearbox gearshift piston 101 in the rear sub-gearbox gearshift cylinder 1 drives the rear sub-gearbox gearshift shaft 2 to move to the left, the rear sub-gearbox gearshift shaft 2 drives the rear sub-gearbox gearshift yoke 12 and the rear sub-gearbox gearshift shaft head 3 to move to the left, at this time, the rear sub-gearbox gearshift shaft head 3 and the rear sub-gearbox return middle shaft head 5 are disengaged.

Claims

1. An AMT rear range box intermediate position limiting device, characterized in that, The rear sub-gearbox return shaft (4) has a rear sub-gearbox return shaft head (5) at one end, which is used for limiting the rear sub-gearbox gear shaft head (3) in the AMT rear sub-gearbox. The rear sub-gearbox return cylinder (6) is provided with a rear sub-gearbox return piston (7) therein, and one side of the rear sub-gearbox return piston (7) is fixedly connected with the other end of the rear sub-gearbox return shaft (4).

2. The AMT range gearbox intermediate position limiting device according to claim 1, characterized in that, One end of the first gas pipe (8) is communicated with the rodless cavity of the rear sub-gearbox return cylinder (6), and the other end of the first gas pipe (8) is communicated with the first gas outlet of the two-position three-way electromagnetic valve (9).

3. The AMT range middle position limiting device according to claim 1, characterized in that, The rear sub-gearbox gear cylinder (1) is provided with a rear sub-gearbox gear piston (101) capable of moving left and right, and one end of the rear sub-gearbox gear piston (101) is fixedly connected with the rear sub-gearbox gear shaft (2).

4. The AMT range gearbox intermediate position limiting device according to claim 3, characterized in that, The rear sub-gearbox return piston (7) is located at the left end limit stroke state in the rear sub-gearbox return cylinder (6), and the rear sub-gearbox gear piston (101) is located at the middle position in the rear sub-gearbox gear cylinder (1) to achieve limiting.

5. The AMT range gearbox intermediate position limiting device according to claim 3, characterized in that, The rear sub-gearbox gear shaft (2) and the rear sub-gearbox return shaft (4) are both horizontally arranged and located on the same horizontal line.

6. The AMT range gearbox intermediate position limiting device according to claim 3, characterized in that, The rear sub-gearbox gear cylinder (1) is further provided with a rear sub-gearbox piston electromagnet (102) capable of moving left and right, and the bottom of the rear sub-gearbox piston electromagnet (102) is fixedly connected with the top of the rear sub-gearbox gear piston (101).

7. The AMT range middle position limiting device of claim 3, wherein, The rear sub-gearbox gear cylinder (1) is further provided with a rear sub-gearbox piston displacement sensor (103) in the moving direction of the rear sub-gearbox piston electromagnet (102), and the width of the rear sub-gearbox piston displacement sensor (103) is equal to the width of the rear sub-gearbox gear cylinder (1). The bottom of the rear sub-gearbox piston displacement sensor (103) is in contact with the top of the rear sub-gearbox piston electromagnet (102).

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