Commercial vehicle transmission structure

Abstract

The utility model discloses a commercial vehicle transmission structure, which belongs to the technical field of transmission gear selecting and shifting and comprises a shell, a gear selecting rocker arm, a gear selecting shaft, a gear shifting shaft and a gear shifting rocker arm. The gear selecting shaft comprises an auxiliary rod section and a main rod section which are arranged up and down, a spline is arranged on the outer ring of the auxiliary rod section, a spline groove matched with the spline on the auxiliary rod section is formed in one end of the gear selecting rocker arm, a boss abutting against the lower side of the gear selecting rocker arm is arranged at the lower end of the auxiliary rod section, and a first clamping spring limiting the upper portion of the gear selecting rocker arm is clamped at the upper end of the auxiliary rod section. The gear selecting rocker arm is matched with the spline on the gear selecting shaft through the spline groove, the gear selecting rocker arm is axially limited through the boss and the first clamping spring, the requirement for the flexible installation angle of the gear selecting rocker arm can be met, the installation height of the gear selecting rocker arm is effectively reduced, the gap between the gear selecting rocker arm and the shell is smaller, arrangement is more compact, and therefore the bearing space of a vehicle is increased. The overall structure is simple, implementation is easy, and practicability is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of transmission gear selection and shifting, in particular to a commercial vehicle transmission structure. Background Art

[0002] The transmission is one of the most important assemblies of the car. In the field of commercial vehicles, manual mechanical transmission is still the most widely used. With the subdivision of the commercial vehicle field, under the condition of a certain vehicle height, increasing the cargo storage space as much as possible is one of the important research directions today.

[0003] The traditional transmission gear selector rocker arm is installed at the top of the transmission, and the gear selector shaft is connected to the gear selector rocker arm through a crescent groove and bolts, resulting in a large gap between the gear selector rocker arm and the transmission housing, which is not compact enough, thereby causing a waste of vehicle carrying space. Utility Model Content

[0004] In order to solve the problem that the traditional transmission gear selector rocker arm is installed at the uppermost end of the transmission, the gear selector shaft is connected to the gear selector rocker arm through a crescent groove and bolts, resulting in a large gap between the gear selector rocker arm and the transmission housing, which is not compact enough and thus causes a waste of vehicle carrying space, the utility model provides a commercial vehicle transmission structure.

[0005] The utility model is realized by the following technical solutions:

[0006] A commercial vehicle transmission structure comprises a housing, a gear selection rocker arm, a gear selection shaft, a shift shaft and a gear shift rocker arm, wherein the gear shift shaft is horizontally rotatably installed in the housing, a gear selection and shifting dial head is slidably sleeved on the gear shift shaft along its axial direction, a gear selection hand feeling mechanism is installed on the gear selection and shifting dial head, and a gear selection hand feeling groove which can engage with the gear selection hand feeling mechanism is provided on the gear shift shaft; the gear selection shaft is vertically rotatably installed in the housing, and a gear selection rotating arm which can shift the gear selection and shifting dial head is connected and installed at the lower end of the gear selection shaft; the gear selection shaft comprises an auxiliary rod section and a main rod section arranged up and down, a spline is provided on the outer ring of the auxiliary rod section, a spline groove which cooperates with the spline on the auxiliary rod section is provided at one end of the gear selection rocker arm, a boss abutting against the lower side of the gear selection rocker arm is provided at the lower end of the auxiliary rod section, and a first retaining spring which limits the upper part of the gear selection rocker arm is clamped at the upper end of the auxiliary rod section.

[0007] A further improvement of the utility model is that a stepped hole with a larger upper part and a smaller lower part is provided on the gear selection rocker arm, and a spline groove is provided in a small end of the stepped hole; and a first retaining spring is installed on an upper side of a stepped surface of the stepped hole.

[0008] A further improvement of the utility model is that two sealing ring grooves are provided on the main rod section, and sealing rings capable of sealing with the housing are installed in the sealing ring grooves.

[0009] A further improvement of the utility model is that an elastic retaining ring and a second retaining spring are sequentially clamped on the upper end of the main rod section from bottom to top, and the elastic retaining ring is pressed on the upper side of the shell.

[0010] A further improvement of the utility model is that a return spring capable of respectively abutting against the left and right sides of the selector shift head is sleeved on the shift shaft.

[0011] A further improvement of the utility model is that the gear selection feel mechanism includes a mounting cover and a pressure head; a mounting seat is provided on the gear selection shift head, the pressure head is slidably installed in the mounting seat, and can engage with the gear selection feel groove; the mounting cover is screwed onto the mounting seat, and a feel spring is elastically supported between the pressure head and the mounting cover.

[0012] A further improvement of the utility model is that an adjusting gasket capable of supporting the end surface of the mounting cover is sleeved on the root of the mounting seat.

[0013] A further improvement of the utility model is that a vent plug communicating with the internal cavity of the shell is also installed on the shell.

[0014] A further improvement of the utility model is that an annular limiting groove is provided at one end of the shift shaft away from the shift rocker arm, and a cylindrical pin capable of engaging with the limiting groove is installed on the housing.

[0015] A further improvement of the utility model is that a skeleton-type rubber oil seal capable of sealing the shift shaft sleeve is installed at one end of the housing close to the shift rocker arm.

[0016] It can be seen from the above technical solutions that the beneficial effects of the utility model are:

[0017] When selecting a gear, the gear selection rocker arm drives the gear selection arm to rotate through the gear selection shaft, and the gear selection arm can be axially moved on the gear selection shaft by overlapping the end of the gear selection arm with the gear selection groove on the gear selection and shifting head; the gear selection hand feeling mechanism is pressed into the corresponding gear selection hand feeling groove to provide a gear selection hand feeling; when shifting gears, the gear shift rocker arm drives the gear selection and shifting head to rotate through the gear selection and shifting shaft, and the gear shifting operation is realized through the gear selection and shifting head. The gear selection rocker arm is installed by matching the spline groove with the spline on the gear selection shaft, and the axial position of the gear selection rocker arm is limited by the boss and the first retaining spring, which can realize the flexible installation angle requirements of the gear selection rocker arm, and effectively reduce the installation height of the gear selection rocker arm, so that the gap between the gear selection rocker arm and the housing is smaller, and the layout is more compact, thereby increasing the vehicle's carrying space. The overall structure is simple, easy to implement, and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a front cross-sectional schematic diagram of a specific implementation method of the utility model.

[0020] Figure 2 This is a schematic diagram of the installation of the gear selector shaft according to a specific implementation method of the utility model.

[0021] Figure 3 It is a side cross-sectional schematic diagram of a specific implementation method of the utility model.

[0022] Figure 4 It is a top cross-sectional schematic diagram of a specific implementation method of the utility model.

[0023] In the accompanying drawings: 1. housing, 2. gear selection rocker arm, 3. gear selection shaft, 31. main rod section, 32. sealing ring groove, 33. elastic retaining ring groove, 34. second retaining ring groove, 35. boss, 36. auxiliary rod section, 37. first retaining ring groove, 4. first retaining ring, 5. sealing ring, 6. gear selection arm, 7. shift shaft, 8. gear shift rocker arm, 9. return spring, 10. spring seat, 11. cylindrical pin, 12. breather plug, 13. skeleton type rubber oil seal, 14. gear selection dial head, 15. gear selection feel mechanism, 151. mounting seat, 152. feel spring, 153. pressure head, 154. mounting cover, 155. adjusting gasket, 16. elastic retaining ring, 17. second retaining ring. DETAILED DESCRIPTION

[0024] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0025] like Figure 1-4As shown, an optional embodiment of the utility model discloses a commercial vehicle transmission structure, including a housing 1, a gear selection rocker arm 2, a gear selection shaft 3, a shift shaft 7 and a gear shift rocker arm 8. The shift shaft 7 is installed in the housing 1 for horizontal rotation. A gear selection and shifting dial head 14 is slidably sleeved along its axial direction on the shift shaft 7. An axial guide key is installed on the shift shaft 7. A guide groove that cooperates with the guide key sliding guide is provided on the gear selection and shifting dial head 14, so that the gear selection and shifting dial head 14 can slide along the axial direction of the shift shaft 7. A gear selection hand feeling mechanism 15 is installed on the gear selection and shifting dial head 14, and a gear selection hand feeling mechanism 15 that can cooperate with the gear selection hand feeling mechanism is provided on the shift shaft 7. The gear selection feel groove is engaged with the structure 15; the gear selection shaft 3 is vertically rotatably installed in the housing 1, and the lower end of the gear selection shaft 3 is connected to the gear selection arm 6 that can select the gear shift dial head 14; the gear selection shaft 3 includes an auxiliary rod section 36 and a main rod section 31 arranged up and down, the outer circle of the auxiliary rod section 36 is provided with a spline, and one end of the gear selection rocker arm 2 is provided with a spline groove that cooperates with the spline on the auxiliary rod section 36, and the lower end of the auxiliary rod section 36 is provided with a boss 35 that abuts against the lower side of the gear selection rocker arm 2, and the upper end of the auxiliary rod section 36 is provided with a first retaining spring groove 37, and the first retaining spring groove 37 is clamped with a first retaining spring 4 for limiting the upper part of the gear selection rocker arm 2.

[0026] When selecting a gear, the gear selection rocker arm 2 drives the gear selection arm 6 to rotate through the gear selection shaft 3, and the gear selection arm 14 can be axially moved on the gear selection shaft 7 by overlapping the end of the gear selection arm 6 with the gear selection groove on the gear selection and shifting head 14; the gear selection hand feeling mechanism 15 is pressed into the corresponding gear selection hand feeling groove to provide a gear selection hand feeling; when shifting gears, the gear shift rocker arm 8 drives the gear selection and shifting head 14 to rotate through the gear selection shaft 7, and the gear shifting operation is realized through the gear selection and shifting head 14. The gear selection rocker arm 2 is installed by matching the spline groove with the spline on the gear selection shaft 3, and the axial position of the gear selection rocker arm 2 is limited by the boss 35 and the first retaining spring 4, so that the flexible installation angle requirements of the gear selection rocker arm 2 can be realized, and the installation height of the gear selection rocker arm 2 can be effectively reduced, so that the gap between the gear selection rocker arm 2 and the housing 1 is smaller, and the arrangement is more compact, thereby increasing the carrying space of the vehicle. The overall structure is simple, easy to implement, and practical.

[0027] Among them, Figure 2 As shown, a stepped hole with a larger upper part and a smaller lower part is provided on the gear selection rocker arm 2, and a spline groove is provided in the small end of the stepped hole; the first retaining spring 4 is installed on the upper side of the stepped surface of the stepped hole. The first retaining spring 4 is installed in a sunken manner, which effectively ensures the reliability of its axial (vertical) limit of the gear selection rocker arm 2.

[0028] Among them, Figure 2 As shown, two sealing ring grooves 32 are provided on the main rod section 31, and sealing rings 5 ​​capable of sealing with the housing 1 are installed in the sealing ring grooves 32. The sealing ring 5 is an O-ring, which effectively prevents moisture from entering the housing 1 through the gap between the shift select shaft 3 and the housing 1 to cause rust on the components and jamming of the operation.

[0029] Furthermore, the upper end of the main rod section 31 is sequentially clamped with an elastic circlip 16 and a second clamping spring 17 from bottom to top, and the elastic circlip 16 is pressed against the upper side of the housing 1. The elastic circlip 16 is limited by the second clamping spring 17, so that the elastic circlip 16 is attached to the upper side of the housing 1, thereby limiting the upper end of the gear selection shaft 3, and the lower end of the gear selection shaft 3 is limited by the gear selection rotating arm 6, so that the accuracy and reliability of the installation of the gear selection shaft 3 can be achieved.

[0030] like Figure 3 As shown, the shift shaft 7 is provided with a return spring 9 which can respectively abut against the left and right sides of the selector shift knob 14, and spring seats 10 elastically supporting one end of the return spring 9 are installed on both sides of the selector shift knob 14, and the other end of the return spring 9 is elastically supported by the housing 1, so that the selector shift knob 14 can be automatically reset.

[0031] like Figure 4 As shown, the gear selection hand feeling mechanism 15 includes a mounting cover 154 and a pressure head 153; a mounting seat 151 is provided on the gear selection and shifting dial head 14, and the pressure head 153 is slidably mounted in the mounting seat 151 and can be engaged with the gear selection hand feeling groove; the mounting cover 154 is screwed on the mounting seat 151, and a hand feeling spring 152 is elastically supported between the pressure head 153 and the mounting cover 154. The hand feeling spring 152 is press-fitted and installed through the mounting cover 154 to realize elastic press-fitting of the pressure head 153. When the pressure head 153 is engaged in the gear selection hand feeling groove, a hand feeling is provided for gear selection.

[0032] Furthermore, the base of the mounting seat 151 is provided with an adjustment gasket 155 capable of supporting the end surface of the mounting cover 154. By replacing the adjustment gasket 155 of different thicknesses, the mounting cover 154 can be flexibly screwed and installed, thereby flexibly adjusting the supporting force of the hand feeling spring 152 on the pressure head 153 to meet the hand feeling needs of different users.

[0033] like Figure 1 As shown, a vent plug 12 communicating with the inner cavity of the housing 1 is also installed on the housing 1. The vent plug 12 is used to protect the inner cavity of the housing 1 from pressure changes, thereby preventing the movement from being affected by the sudden change of the inner cavity pressure of the housing 1.

[0034] Among them, Figure 3 As shown, an annular limiting groove is provided at one end of the shift shaft 7 away from the shift rocker arm 8, and a cylindrical pin 11 capable of engaging with the limiting groove is installed on the housing 1. The cylindrical pin 11 cooperates with the annular limiting groove to achieve axial limiting of the shift shaft 7 and ensure flexible rotation of the shift shaft 7.

[0035] Among them, Figure 3As shown, a skeleton rubber oil seal 13 capable of sealing the shift shaft 7 is installed at one end of the housing 1 close to the shift rocker arm 8, and the other end of the housing 1 is sealed by a bowl-shaped plug. The skeleton rubber oil seal 13 and the bowl-shaped plug can achieve good sealing between the two ends of the shift shaft 7 and the housing 1.

[0036] In the transmission structure of the commercial vehicle, when selecting a gear, the gear selection rocker arm 2 drives the gear selection arm 6 to rotate through the gear selection shaft 3, and the gear selection arm 14 can be axially moved on the gear selection shaft 7 by overlapping the end of the gear selection arm 6 with the gear selection groove on the gear selection and shifting head 14; the gear selection hand feeling mechanism 15 is pressed into the corresponding gear selection hand feeling groove to provide a gear selection hand feeling; when shifting gears, the gear shift rocker arm 8 drives the gear selection and shifting head 14 to rotate through the gear selection shaft 7, and the gear shifting operation is realized through the gear selection and shifting head 14. The gear selection rocker arm 2 is installed by matching the spline groove with the spline on the gear selection shaft 3, and the axial position of the gear selection rocker arm 2 is limited by the boss 35 and the first retaining spring 4, so that the flexible installation angle requirements of the gear selection rocker arm 2 can be realized, and the installation height of the gear selection rocker arm 2 can be effectively reduced, so that the gap between the gear selection rocker arm 2 and the housing 1 is smaller, and the arrangement is more compact, thereby increasing the carrying space of the vehicle. The overall structure is simple, easy to implement, and practical.

[0037] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0038] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0039] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A commercial vehicle transmission structure, characterized in that: The invention comprises a housing (1), a gear selection rocker arm (2), a gear selection shaft (3), a shift shaft (7) and a gear shift rocker arm (8); the shift shaft (7) is horizontally rotatably mounted in the housing (1); a gear selection dial head (14) is slidably sleeved on the shift shaft (7) along its axial direction; a gear selection hand feeling mechanism (15) is mounted on the gear selection dial head (14); and a gear selection hand feeling groove capable of engaging with the gear selection hand feeling mechanism (15) is provided on the shift shaft (7); the gear selection shaft (3) is vertically rotatably mounted in the housing (1); and the gear selection shaft (3) is vertically rotatably mounted in the housing (1). ) is connected to the lower end thereof with a gear selection arm (6) capable of shifting a gear selection shifting head (14); the gear selection shaft (3) comprises an auxiliary rod section (36) and a main rod section (31) arranged up and down, the auxiliary rod section (36) having an outer ring provided with a spline, one end of the gear selection rocker arm (2) having a spline groove matched with the spline on the auxiliary rod section (36), the lower end of the auxiliary rod section (36) having a boss (35) abutting against the lower side of the gear selection rocker arm (2), and the upper end of the auxiliary rod section (36) having a first retaining spring (4) for limiting the upper part of the gear selection rocker arm (2) clamped thereon.

2. The commercial vehicle transmission structure according to claim 1, characterized in that: A stepped hole with a larger upper portion and a smaller lower portion is provided on the gear selection rocker arm (2), and a spline groove is provided in the small end of the stepped hole; and a first retaining spring (4) is installed on the upper side of the stepped surface of the stepped hole.

3. The commercial vehicle transmission structure according to claim 1, characterized in that: Two sealing ring grooves (32) are formed on the main rod section (31), and sealing rings (5) capable of sealing with the housing (1) are installed in the sealing ring grooves (32).

4. The commercial vehicle transmission structure according to claim 1, characterized in that: An elastic retaining ring (16) and a second retaining spring (17) are sequentially mounted on the upper end of the main rod section (31) from bottom to top, and the elastic retaining ring (16) is pressed onto the upper side of the housing (1).

5. The commercial vehicle transmission structure according to claim 1, characterized in that: The shift shaft (7) is provided with a return spring (9) capable of respectively abutting against the left and right sides of the shift selector head (14).

6. The commercial vehicle transmission structure according to claim 1, characterized in that: The gear selection feel mechanism (15) comprises a mounting cover (154) and a pressure head (153); a mounting seat (151) is provided on the gear selection and shifting dial head (14); the pressure head (153) is slidably mounted in the mounting seat (151) and can be engaged with the gear selection feel groove; the mounting cover (154) is screwed onto the mounting seat (151), and a feel spring (152) is elastically supported between the pressure head (153) and the mounting cover (154).

7. The commercial vehicle transmission structure according to claim 6, characterized in that: An adjustment gasket (155) capable of supporting the end surface of the mounting cover (154) is sleeved on the root of the mounting seat (151).

8. The commercial vehicle transmission structure according to claim 1, characterized in that: The housing (1) is also provided with a vent plug (12) which is in communication with the internal cavity thereof.

9. The commercial vehicle transmission structure according to claim 1, characterized in that: An annular limiting groove is provided at one end of the shift shaft (7) away from the shift rocker arm (8), and a cylindrical pin (11) capable of engaging with the limiting groove is mounted on the housing (1).

10. The commercial vehicle transmission structure according to claim 1, characterized in that: A skeleton-type rubber oil seal (13) capable of sealing the shift shaft (7) is installed at one end of the housing (1) close to the shift rocker arm (8).

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