Gear selecting and returning structure of air-assisted control assembly

Abstract

The utility model discloses a gas-assisted control assembly gear-selecting return structure which comprises a gear-selecting return structure body, the gear-selecting return structure body comprises a control shell, and the control shell comprises a frustum section, a horizontal section and a return section which are connected in sequence. A transverse gear shifting rod is coaxially installed in the control shell, and the input end of the transverse gear shifting rod is sequentially and coaxially sleeved with a first spring seat, a balance spring and a second spring seat. The inner diameter of the return section is larger than the outer diameter of the first spring seat, the outer diameter of the balance spring and the outer diameter of the second spring seat, so that the first spring seat, the balance spring and the second spring seat are all not in contact with the inner wall of the return section. According to the control shell, the diameter of the inner hole of the return section is increased, the phenomenon that the balance spring makes contact with the inner hole wall of the shell in the compression and extension process to generate friction resistance, and gear selection clamping stagnation of a return structure occurs is avoided, the bottom of the control shell is additionally provided with the oil return groove with the gradient, the oil return groove is matched with the oil return notch of the spring seat, and the oil return function is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle technology and relates to air-assisted control assembly, specifically to a gear selection and return structure for air-assisted control assembly. Background Technology

[0002] With the continuous development of the bus market, 5D and 6D series transmissions are being used more widely, while high-end buses have higher requirements for the comfort of transmission operation. 5D and 6D series high-torque transmissions with input torque exceeding 1000 N·m often suffer from problems such as high shifting force and difficulty in shifting. This directly affects the driver's driving experience and fatigue level, and in severe cases, may lead to traffic accidents.

[0003] The gear shifting process in a vehicle generally consists of two parts: gear selection and gear shifting. Currently, control assemblies with pneumatic shift boosters (hereinafter referred to as pneumatic control assemblies) have solved the problems of high shifting force and difficulty in shifting, significantly improving the driver's shifting feel and reducing driving fatigue. However, due to their complex structure, these pneumatic control assemblies still have many problems in the gear selection process, such as high shifting force and unclear shifting feel. Particularly prominent issues include gear selection return sticking and oil leakage from the control assembly's breather plug. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to propose a gear selection return structure for a pneumatic control assembly, so as to solve the technical problem that the gear selection return is prone to jamming in the existing technology.

[0005] Another objective of this invention is to propose a gear selection and return structure for a pneumatic control assembly, in order to solve the technical problem of easy oil leakage from the breather plug of the control assembly in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A gear selection and return structure for a pneumatic control assembly includes a gear selection and return structure body, which includes a control housing. The control housing includes a frustum section, a horizontal section, and a return section connected in sequence. The length of the frustum section is less than the length of the horizontal section, and the length of the horizontal section is greater than the length of the return section.

[0008] The transverse shift lever is coaxially mounted inside the control housing. The input end of the transverse shift lever extends out of the control housing, and the output end of the transverse shift lever extends into the frustum section. The transverse shift lever is provided with an inter-shaft step, which is located inside the control housing.

[0009] The input end of the transverse shift lever is coaxially sleeved with a first spring seat, a balance spring and a second spring seat in sequence; the end of the first spring seat away from the balance spring is axially limited by the shaft interval step; one end of the balance spring is sleeved on the first spring seat, and the other end of the balance spring is sleeved on the second spring seat; and the second spring seat is axially limited by the elastic shaft ring.

[0010] The inner diameter of the return section is greater than the outer diameters of the first spring seat, the balance spring and the second spring seat, so that the first spring seat, the balance spring and the second spring seat are not in contact with the inner wall of the return section.

[0011] The application also has the following technical features:

[0012] The first spring seat comprises a first protruding part and a first positioning part connected in sequence, the diameter of the first protruding part is greater than that of the first positioning part, one end of the first protruding part is abutted on the shaft interval step for axial limitation, the balance spring is sleeved on the first positioning part, and one end of the balance spring is abutted on the first protruding part.

[0013] The second spring seat comprises a second protruding part and a second positioning part connected in sequence, the diameter of the second protruding part is greater than that of the second positioning part, one end of the second protruding part is axially positioned by the elastic shaft ring, the diameter of the elastic shaft ring is smaller than that of the second protruding part, the balance spring is sleeved on the second positioning part, and the other end of the balance spring is abutted on the second protruding part.

[0014] The inner diameter of the return section is greater than the inner diameter of the horizontal section, and the first protruding part is abutted on the inner end surface of the horizontal section; the outer end of the return section is matched with the operating shell end cover, and the second protruding part is abutted on the operating shell end cover.

[0015] The operating shell end cover comprises a shell end cover body section and a shell end cover protruding section connected in sequence, and the outer diameter of the shell end cover body section is greater than that of the shell end cover protruding section.

[0016] The inner end surface of the shell end cover body section is attached to the outer end surface of the return section, the outer end surface of the shell end cover protruding section is partially in contact with one end of the second protruding part, the inner side wall of the shell end cover protruding section is not in contact with the outer side wall of the elastic shaft ring, and the outer side wall of the shell end cover protruding section is in contact with the inner wall of the return section.

[0017] The side of the horizontal section close to the frustum section is internally provided with a hollow copper sleeve for supporting the output end of the transverse shift lever.

[0018] The outer end of the return section is matched with the operating shell end cover, and the shell end cover body section of the operating shell end cover is provided with a center hole for supporting the input end of the transverse shift lever.

[0019] The side wall corner of the hollow copper sleeve in contact with the inner wall of the horizontal section is provided with a stepped section, which is composed of a 15° chamfer section, a horizontal section of the copper sleeve and a 30° round corner section in sequence, and the 30° round corner section is located at the outer edge of the side wall corner of the hollow copper sleeve.

[0020] The horizontal section is provided with a hollow rotating shaft between the horizontal section and the transverse shift lever, and a shift assist device is further arranged on the horizontal section, and the shift assist device drives the hollow rotating shaft to rotate.

[0021] A plurality of first oil return notches are formed in the side wall of the first spring seat, and a plurality of second oil return notches are formed in the side wall of the second spring seat, and the first oil return notches and the second oil return notches are communicated with the inner cavity of the operating shell.

[0022] A first oil return groove with a slope is formed in the inner wall of the operating shell, one end of the first oil return groove is close to the second oil return notch, the other end of the first oil return groove is communicated with an oil port, and the oil port is formed in the horizontal section.

[0023] A second oil return groove without a slope is formed in the inner wall of the operating shell, an oil return hole is formed in the hollow rotating shaft, one end of the second oil return groove is close to the oil return hole, and the other end of the second oil return groove is communicated with the oil port.

[0024] The slope of the first oil return groove is 3.8°.

[0025] A cooperation gap is left between the inner wall of the first spring seat and the second spring seat and the side wall of the transverse shift lever, and the axial dimension of the first spring seat and the second spring seat is equal to the pitch length of the balance spring.

[0026] An air vent plug mounting hole is formed in the shell of the return section, and the central axis of the air vent plug mounting hole is vertically arranged with the central axis of the balance spring.

[0027] Compared with the prior art, the utility model has the following beneficial technical effects:

[0028] (I) The operating shell in the air-assisted operating assembly gear selection return structure increases the inner hole diameter of the return section, avoids the frictional resistance generated by the contact between the balance spring and the inner hole wall of the shell during the compression and elongation process, and avoids the gear selection jamming phenomenon of the return structure, the oil return groove with a slope is arranged at the bottom of the operating shell, cooperates with the oil return notch of the spring seat, and the oil return function is strengthened.

[0029] (II) The spring seat in the gear selection and return structure of the pneumatic control assembly proposed in this utility model can achieve radial positioning of the balance spring, avoid the balance spring from being tilted during assembly, ensure the coaxiality of the balance spring and the transverse shift lever, greatly reduce the damping of the gear selection and return structure of the pneumatic control assembly, make gear selection and return smooth and flexible, and optimize the internal oil return structure of the control housing.

[0030] (III) The spring seat and the transverse shift lever in the gear selection return structure of the pneumatic control assembly proposed in this utility model have an increased axial dimension, which improves the return guiding performance, prevents the spring seat and the transverse shift lever from getting stuck when selecting gears and reduces the self-damping of the gear selection return structure. Attached Figure Description

[0031] Figure 1 A schematic diagram of the gear selection and return structure of the pneumatic power steering assembly.

[0032] Figure 2 This is a schematic diagram of the internal structure of the return segment.

[0033] Figure 3 This is a schematic diagram of the structure of the first spring seat.

[0034] Figure 4 A schematic diagram of the structure for fitting gaps.

[0035] Figure 5 This is a schematic diagram of the hollow copper sleeve.

[0036] Figure 6 Detailed schematic diagram of point A of the hollow copper sleeve.

[0037] Figure 7 This is a schematic diagram of the aperture of the return section.

[0038] Figure 8 This is a schematic diagram of the first return oil tank.

[0039] Figure 9 A schematic diagram of the structure for installing the vent plug.

[0040] The meanings of the labels in the diagram are as follows: 1-Control housing, 2-Transverse shift lever, 3-Inter-shaft step, 4-First spring seat, 5-Balance spring, 6-Second spring seat, 7-Shaft elastic retaining ring, 8-Control housing end cover, 9-Hollow copper sleeve, 10-Step section, 11-Hollow rotating shaft, 12-Shift booster, 13-First oil return groove, 14-Second oil return groove, 15-Oil return hole, 16-Match clearance, 17-Ventil plug mounting hole.

[0041] 101-cone section, 102-horizontal section, 103-return section, 104-oil port.

[0042] 401 - First protrusion, 402 - First positioning part, 403 - First oil return notch.

[0043] 601 - Second protrusion, 602 - Second positioning part, 603 - Second return oil notch.

[0044] 801 - Shell end cap body section, 802 - Shell end cap protruding section.

[0045] 1001 - 15° chamfered section, 1002 - horizontal section with copper sleeve, 1003 - 30° rounded corner section.

[0046] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0047] It should be noted that, unless otherwise specified, all equipment and components in this utility model are based on existing technologies. The main body of the gear selection and return structure in this utility model is a known gear selection and return structure in the art.

[0048] Following the above technical solution, the following are specific embodiments of this utility model. It should be noted that this utility model is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solution of this application fall within the protection scope of this utility model.

[0049] Example:

[0050] This embodiment provides a gear selection return structure for a pneumatic power steering assembly, including a gear selection return structure body, which includes a control housing 1, as shown below. Figure 1 As shown, the control housing 1 includes a frustum section 101, a horizontal section 102 and a return section 103 connected in sequence. The length of the frustum section 101 is less than the length of the horizontal section 102, and the length of the horizontal section 102 is greater than the length of the return section 103.

[0051] like Figure 1 As shown, a transverse shift lever 2 is coaxially mounted inside the control housing 1. The input end of the transverse shift lever 2 extends out of the control housing 1, and the output end of the transverse shift lever 2 extends into the frustum section 101. An inter-shaft step 3 is provided on the transverse shift lever 2, and the inter-shaft step 3 is located inside the control housing 1.

[0052] like Figure 1 and Figure 2As shown, the input end of the transverse shift lever 2 is coaxially fitted with a first spring seat 4, a balance spring 5, and a second spring seat 6 in sequence; the end of the first spring seat 4 away from the balance spring 5 is axially limited by the inter-shaft step 3; one end of the balance spring 5 is fitted on the first spring seat 4, and the other end of the balance spring 5 is fitted on the second spring seat 6, which is axially limited by the shaft elastic retaining ring 7.

[0053] like Figure 1 , Figure 2 and Figure 7 As shown, the inner diameter of the return section 103 is larger than the outer diameter of the first spring seat 4, the outer diameter of the balance spring 5, and the outer diameter of the second spring seat 6, so that the first spring seat 4, the balance spring 5, and the second spring seat 6 do not contact the inner wall of the return section 103.

[0054] As a preferred embodiment of this invention, such as Figure 2 As shown, the first spring seat 4 includes a first protrusion 401 and a first positioning part 402 connected in sequence. The diameter of the first protrusion 401 is larger than the diameter of the first positioning part 402. One end of the first protrusion 401 abuts against the inter-shaft step 3 for axial positioning. The balance spring 5 is sleeved on the first positioning part 402, and one end of the balance spring 5 abuts against the first protrusion 401.

[0055] As a preferred embodiment of this invention, such as Figure 2 As shown, the second spring seat 6 includes a second protrusion 601 and a second positioning part 602 connected in sequence. The diameter of the second protrusion 601 is larger than the diameter of the second positioning part 602. One end of the second protrusion 601 is axially positioned by a shaft elastic retaining ring 7. The diameter of the shaft elastic retaining ring 7 is smaller than the diameter of the second protrusion 601. The balance spring 5 is sleeved on the second positioning part 602, and the other end of the balance spring 5 abuts against the second protrusion 601.

[0056] As a preferred embodiment of this invention, such as Figure 1 and Figure 2 As shown, the inner diameter of the return section 103 is larger than the inner diameter of the horizontal section 102, and the first protrusion 401 abuts against the inner end face of the horizontal section 102; the outer end of the return section 103 is fitted with an operating housing end cover 8, and the second protrusion 601 abuts against the operating housing end cover 8.

[0057] As a preferred embodiment of this invention, such as Figure 1 As shown, the control housing end cover 8 includes a housing end cover body section 801 and a housing end cover protruding section 802, which are connected in sequence. The outer diameter of the housing end cover body section 801 is larger than the outer diameter of the housing end cover protruding section 802.

[0058] As a preferred embodiment of this invention, such as Figure 1 As shown, the inner end face of the housing end cover body section 801 is in contact with the outer end face of the return section 103, the outer end face of the housing end cover protruding section 802 is in contact with one end of the second protrusion 601, the inner side wall of the housing end cover protruding section 802 is not in contact with the outer side wall of the shaft elastic retaining ring 7, and the outer side wall of the housing end cover protruding section 802 is in contact with the inner wall of the return section 103.

[0059] As a preferred embodiment of this invention, such as Figure 1 As shown, a hollow copper sleeve 9 is provided inside the side of the horizontal section 102 near the frustum section 101. The hollow copper sleeve 9 is used to support the output end of the horizontal shift lever 2.

[0060] As a preferred embodiment of this invention, such as Figure 1 As shown, the outer end of the return section 103 is fitted with an operating housing end cover 8, and the housing end cover body section 8 of the operating housing end cover 8 has a central hole for supporting the input end of the transverse shift lever 2.

[0061] As a preferred embodiment of this invention, such as Figure 5 and Figure 6 As shown, the corners of the sidewalls where the hollow copper sleeve 9 contacts the inner wall of the horizontal section 102 are all set as stepped sections 10. The stepped section 10 is composed of a 15° chamfered section 1001, a copper sleeve horizontal section 1002 and a 30° rounded corner section 1003 connected in sequence. The 30° rounded corner section 1003 is located at the outer edge of the corner of the sidewall of the hollow copper sleeve 9.

[0062] As a preferred embodiment of this invention, such as Figure 1 As shown, a hollow rotating shaft 11 is provided between the horizontal section 102 and the transverse shift lever 2. A shift booster 12 is also provided on the horizontal section 102, and the shift booster 12 drives the hollow rotating shaft 11 to rotate.

[0063] As a preferred embodiment of this invention, such as Figure 1 and Figure 3 As shown, the first spring seat 4 has multiple first oil return notches 403 on its side wall, and the second spring seat 6 has multiple second oil return notches 603 on its side wall. The first oil return notches 403 and the second oil return notches 603 communicate with the inner cavity of the operating housing 1.

[0064] As a preferred embodiment of this invention, such as Figure 1 and Figure 8 As shown, a first oil return groove 13 with a slope is provided on the inner wall of the control housing 1. One end of the first oil return groove 13 is close to the second oil return opening 603, and the other end of the first oil return groove 13 is connected to the oil port 104, which is located on the horizontal section 102.

[0065] As a preferred embodiment of this invention, such as Figure 1 As shown, a second oil return groove 14 without slope is provided on the inner wall of the control housing 1, and an oil return hole 15 is provided on the hollow rotating shaft 11. One end of the second oil return groove 14 is close to the oil return hole 15, and the other end of the second oil return groove 15 is connected to the oil port 104.

[0066] As a preferred embodiment, the slope of the first return oil tank 13 is 3.8°.

[0067] As a preferred embodiment of this invention, such as Figure 1 and Figure 4 As shown, a fitting gap 16 is left between the inner wall of the first spring seat 4 and the second spring seat 6 and the side wall of the transverse shift lever 2.

[0068] As a preferred embodiment, the axial dimensions of the first spring seat 4 and the second spring seat 6 are equal to one pitch length of the balance spring 5.

[0069] As a preferred embodiment of this invention, such as Figure 9 As shown, a vent hole 17 is provided on the housing of the return section 102, and the central axis of the vent hole 17 is set perpendicular to the central axis of the balance spring 5.

[0070] In this preferred embodiment, the first spring seat 4, the second spring seat 6, the balance spring 5, and the shaft elastic retaining ring 7 are sequentially sleeved on the transverse shift lever 2 and then installed as a whole into the control housing 1. One end of the transverse shift lever 2 is supported in the hollow copper sleeve 9 near the shift booster 11, and the other end is supported in the center hole of the control housing end cover 8.

[0071] In this preferred embodiment, the first spring seat 4 and the second spring seat 6 directly achieve radial positioning of the balance spring 5, while optimizing the inner hole size of the return section 103. Even if the outer diameter of the balance spring 5 increases after compression, it will not come into contact with the inner hole wall of the operating housing 1, thus eliminating frictional resistance and reducing gear selection return resistance.

[0072] In this preferred embodiment, the first spring seat 4 and the second spring seat 6 are fitted with a small clearance between their inner diameters and the balance spring 5. This ensures the coaxiality of the balance spring 5 and the transverse shift lever 2, and facilitates assembly while meeting the radial positioning requirements of the balance spring 5. The axial dimensions of the first spring seat 4 and the second spring seat 6 are designed to be one pitch length of the balance spring 5, ensuring the compression of the balance spring 5 and preventing gear selection errors.

[0073] In this preferred embodiment, the axial fit dimensions of the first spring seat 4 and the second spring seat 6 with the transverse shift lever 2 are increased to improve the axial guiding performance of gear selection and return. With the same fit clearance, a longer fit length results in a smaller axial tilt angle between the first spring seat 4 and the second spring seat 6 and the transverse shift lever 2, stronger guiding performance, and smoother gear selection and return; a shorter fit length results in a larger axial tilt angle between the first spring seat 4 and the second spring seat 6 and the transverse shift lever 2, poorer guiding performance, and a greater likelihood of gear selection and return jamming.

[0074] In this preferred embodiment, the hollow copper sleeve 9 supports and guides the transverse shift lever 2. The 15° chamfered section 1001 divides the hollow copper sleeve 9 into a large end and a small end. During press-fitting, the small end is first inserted into the inner hole of the control housing 1, forming a small clearance fit with the inner hole of the control housing 1, which facilitates the positioning of the hollow copper sleeve 9 and the inner hole of the control housing 1. When the large end of the hollow copper sleeve 9 is press-fitted into the inner hole of the control housing 1, it causes extrusion deformation of the inner hole, ensuring the effectiveness of the interference fit. The design of the 15° chamfered section 1001 and the 30° rounded corner section 1003 improves the guiding nature of the press-fitting of the hollow copper sleeve 9, ensuring the coaxiality of the inner hole of the hollow copper sleeve 9 and the inner hole of the control housing end cover 8. Whether hammering or pressing, it can avoid the generation of aluminum chips due to sharp corners and prevent the gear selection return structure from jamming.

[0075] In this preferred embodiment, the inner hole size at the gear selector return structure of the return section 103 is increased. Even if the outer diameter of the balance spring 5 increases during the gear selection compression process, it will not come into contact with the inner hole of the control housing 1 to form frictional resistance, thereby improving the gear selection feel and preventing gear selection return jamming. A first oil return groove 13 and a second oil return groove 14 are added to the bottom of the control housing 1. The first oil return groove 13 is designed with a small slope of 3.8° in the oil return direction to increase the oil return speed and effectively prevent oil accumulation and leakage to the outside of the gearbox through the breather plug.

[0076] In this embodiment, the first oil return notch 403 and the second oil return notch 603 ensure that the oil at the vent plug of the control housing 1 can flow smoothly back into the transmission, thus improving the oil leakage phenomenon of the control assembly.

[0077] The working process in this embodiment is as follows:

[0078] When selecting a gear, the transverse shift lever 2 is pulled axially to the left or right from its neutral position. The first spring seat 4 and the second spring seat 6 compress the balance spring 5, generating a force opposite to the direction of movement of the transverse shift lever 2, thus completing the gear shift. When shifting gears again, the reverse force generated by the compressed balance spring 5 allows the transverse shift lever 2 to smoothly return to its original position. During gear selection and shifting, as the transmission temperature rises, the oil vapor generated in the transmission cavity rises and enters the inner cavity of the control housing 1. As the oil vapor passes through the vent plug, it condenses and flows back to the bottom of the inner cavity of the control housing 1. The lubricating oil thrown out by the high-speed rotating gears enters the interior of the control housing 1. The first spring seat 4 and the second spring seat 6 are provided with a first oil return notch 403 and a second oil return notch 603 to increase the oil return volume at the gear selection return structure. The first oil return notch 403 and the second oil return notch 603, together with the first oil return groove 13 and the second oil return groove 14 provided inside the control housing 1, can effectively prevent oil from accumulating in the gear selection return cavity, eliminate the influence on the gear selection feel, and prevent oil from leaking from the vent plug to the outside of the transmission.

Claims

1. A gear selection and return structure for a pneumatic control assembly, comprising a gear selection and return structure body, the gear selection and return structure body comprising a control housing (1), the control housing (1) comprising a frustum section (101), a horizontal section (102) and a return section (103) connected in sequence, wherein the length of the frustum section (101) is less than the length of the horizontal section (102) and the length of the horizontal section (102) is greater than the length of the return section (103); A transverse shift lever (2) is coaxially mounted inside the control housing (1). The input end of the transverse shift lever (2) extends out of the control housing (1), and the output end of the transverse shift lever (2) extends into the frustum section (101). An inter-shaft step (3) is provided on the transverse shift lever (2), and the inter-shaft step (3) is located inside the control housing (1). The characteristic feature is that: The input end of the transverse shift lever (2) is coaxially fitted with a first spring seat (4), a balance spring (5), and a second spring seat (6); the end of the first spring seat (4) away from the balance spring is axially limited by the inter-shaft step (3); one end of the balance spring (5) is fitted on the first spring seat (4), and the other end of the balance spring (5) is fitted on the second spring seat (6), which is axially limited by the shaft elastic retaining ring (7); The inner diameter of the return section (103) is larger than the outer diameter of the first spring seat (4), the outer diameter of the balance spring (5), and the outer diameter of the second spring seat (6), so that the first spring seat (4), the balance spring (5), and the second spring seat (6) do not contact the inner wall of the return section (103).

2. The gear selection and return structure of the gas-assisted control assembly as described in claim 1, characterized in that, The first spring seat (4) includes a first protrusion (401) and a first positioning part (402) connected in sequence. The diameter of the first protrusion (401) is larger than the diameter of the first positioning part (402). One end of the first protrusion (401) abuts against the inter-shaft step (3) for axial positioning. The balance spring (5) is sleeved on the first positioning part (402). One end of the balance spring (5) abuts against the first protrusion (401). The second spring seat (6) includes a second protrusion (601) and a second positioning part (602) connected in sequence. The diameter of the second protrusion (601) is larger than the diameter of the second positioning part (602). One end of the second protrusion (601) is axially positioned by a shaft elastic retaining ring (7). The diameter of the shaft elastic retaining ring (7) is smaller than the diameter of the second protrusion (601). The balance spring (5) is sleeved on the second positioning part (602), and the other end of the balance spring (5) abuts against the second protrusion (601).

3. The gear selection and return structure of the gas-assisted control assembly as described in claim 2, characterized in that, The inner diameter of the return segment (103) is larger than the inner diameter of the horizontal segment (102), and the first protrusion (401) rests on the inner end face of the horizontal segment (102). The outer end of the return section (103) is fitted with an operating housing end cover (8), and the second protrusion (601) rests on the operating housing end cover (8).

4. The gear selection and return structure of the gas-assisted control assembly as described in claim 3, characterized in that, The control housing end cap (8) includes a housing end cap body section (801) and a housing end cap protruding section (802), which are connected in sequence. The outer diameter of the housing end cap body section (801) is larger than the outer diameter of the housing end cap protruding section (802). The inner end face of the housing end cap body section (801) is in contact with the outer end face of the return section (103), the outer end face of the housing end cap protrusion section (802) is in contact with one end of the second protrusion (601), the inner side wall of the housing end cap protrusion section (802) is not in contact with the outer side wall of the shaft elastic retaining ring (7), and the outer side wall of the housing end cap protrusion section (802) is in contact with the inner wall of the return section (103).

5. The gear selection and return structure of the gas-assisted control assembly as described in claim 1, characterized in that, The horizontal section (102) is provided with a hollow copper sleeve (9) on the side near the truncated cone section (101). The hollow copper sleeve (9) is used to support the output end of the horizontal shift lever (2). The outer end of the return section (103) is provided with an operating housing end cover (8), and the housing end cover body section (801) of the operating housing end cover (8) has a central hole for supporting the input end of the transverse shift lever (2).

6. The gear selection return structure of the gas-assisted control assembly as described in claim 5, characterized in that, The hollow copper sleeve (9) is provided with stepped sections (10) at the corners of the side walls that are in contact with the inner wall of the horizontal section (102). The stepped section (10) is composed of a 15° chamfered section (1001), a copper sleeve horizontal section (1002), and a 30° rounded corner section (1003) connected in sequence. The 30° rounded corner section (1003) is located at the outer edge of the corner of the side wall of the hollow copper sleeve (9).

7. The gear selection and return structure of the gas-assisted control assembly as described in claim 1, characterized in that, A hollow rotating shaft (11) is provided between the horizontal section (102) and the transverse shift lever (2). A shift booster (12) is also provided on the horizontal section (102), and the shift booster (12) drives the hollow rotating shaft (11) to rotate. The first spring seat (4) has multiple first oil return notches (403) on its side wall, and the second spring seat (6) has multiple second oil return notches (603) on its side wall. The first oil return notches (403) and the second oil return notches (603) are connected to the inner cavity of the operating housing (1). The inner wall of the control housing (1) is provided with a first oil return groove (13) with a slope. One end of the first oil return groove (13) is close to the second oil return opening (603), and the other end of the first oil return groove (13) is connected to the oil port (104). The oil port (104) is opened on the horizontal section (102). The inner wall of the control housing (1) is provided with a second oil return groove (14) without slope, and the hollow rotating shaft (11) is provided with an oil return hole (15). One end of the second oil return groove (14) is close to the oil return hole (15), and the other end of the second oil return groove (14) is connected to the oil port (104).

8. The gear selection return structure of the gas-assisted control assembly as described in claim 7, characterized in that, The slope of the first return oil tank (13) is 3.8°.

9. The gear selection return structure of the gas-assisted control assembly as described in claim 1, characterized in that, The inner walls of the first spring seat (4) and the second spring seat (6) are provided with a fitting clearance (16) between them and the side wall of the transverse shift lever (2); the axial dimensions of the first spring seat (4) and the second spring seat (6) are equal to one pitch length of the balance spring (5).

10. The gear selection and return structure of the gas-assisted control assembly as described in claim 1, characterized in that, The housing of the return section (103) has a vent hole (17) and the central axis of the vent hole (17) is perpendicular to the central axis of the balance spring (5).

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