Gear shifting system of parallel shaft structure for gearbox

Abstract

According to the gear shifting system of the parallel shaft structure for the gearbox, the gear selecting device, the gear shifting device, the self-locking device, the auxiliary box device and the interlocking device are integrated on the gear shifting mechanism assembly, and the gear shifting self-locking function and the interlocking function are achieved; according to the arrangement, the integration degree is high, and the assembly process of the transmission assembly is greatly optimized. Besides, according to the gear shifting system of the parallel shaft structure for the gearbox, due to the fact that the shifting fork groove is formed in the shifting fork, the shifting fork assembly structure is simplified, and only the shifting fork and the shifting fork shaft are included; the axial length of the whole gear shifting system is short, the gear shifting mechanism is located over the shifting fork, the length of the whole gearbox can be shortened, and meanwhile a motor can be conveniently arranged between a clutch shell and a gearbox shell when the hybrid gearbox is designed. The internal structure is simplified while the overall integration degree is improved, and the device is suitable for industrial large-scale use and popularization.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of automobile gearbox, especially involve a parallel axis structure's gear shifting system for gearbox. BACKGROUND

[0002] The gearbox design requires convenient structure, high reliability and low cost. On the one hand, in order to facilitate the flexible arrangement of the gearbox, the vehicle manufacturer requires the axial length of the gearbox to be as short as possible. On the other hand, the user's pursuit of noise comfort is unceasing, the gearbox gradually changes from straight teeth to helical teeth, and the axial length of the gearbox is further shortened.

[0003] The existing gearbox adopts the coaxial arrangement form of the gear shifting cylinder and the shift fork shaft. Such arrangement makes the gear shifting mechanism occupy part of the clutch housing space, not only increases the axial length of the gearbox, but also makes it difficult to arrange the motor between the clutch housing and the gearbox housing when designing the hybrid gearbox, and leads to the complicated internal structure of the gearbox. SUMMARY

[0004] The utility model discloses a parallel axis structure's gear shifting system for gearbox, which solves the problems of low integration and complicated structure of the gearbox in the prior art.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A parallel axis structure's gear shifting system for gearbox, comprising a shift fork assembly, the shift fork assembly comprising a shift fork shaft arranged transversely and a first shift fork, a second shift fork and a third shift fork sleeved on the shift fork shaft; the first shift fork, the second shift fork and the third shift fork can respectively slide transversely along the shift fork shaft and rotate around the central shaft of the shift fork shaft, and each of the first shift fork, the second shift fork and the third shift fork is provided with a shift fork groove with the same specification on the side away from the shift fork shaft 1;

[0007] A gear shifting mechanism assembly is arranged above the shift fork assembly; the gear shifting mechanism assembly comprises a gear shifting mechanism housing, and the gear shifting mechanism housing is integrated with a selection cylinder, a gear shifting cylinder and a sub-gearbox cylinder on the lower end face;

[0008] The selection cylinder comprises a selection piston rod, and the selection cylinder can drive the selection piston rod to move longitudinally;

[0009] The gear shifting cylinder comprises a gear shifting piston rod, and the gear shifting cylinder can drive the gear shifting piston rod to move transversely and rotate around the central shaft thereof;

[0010] The shift system of the parallel shaft structure of the gearbox is in the neutral position, the fork grooves of the first fork, the second fork and the third fork are aligned and arranged in a circular arc around the center shaft of the shift piston rod, and the fork shafts are parallel to and different from the shift piston rod.

[0011] A self-locking interlocking block is rotatably arranged on the shift piston rod, a through connecting groove is formed in the self-locking interlocking block, and an interlocking head is arranged at the bottom of the self-locking interlocking block.

[0012] A selection shift knob is further rotatably arranged on the shift piston rod, a selection shift knob and a shift knob are arranged on the upper and lower sides of the selection shift knob respectively, the selection shift knob is rotatably connected with the selection piston rod, and the shift knob enters the connecting groove of the self-locking interlocking block from top to bottom and extends out of the lower end of the connecting groove.

[0013] The utility model discloses further have following characteristics:

[0014] Further, the self-locking interlocking block is a "U" shaped structure formed by two side plates and a bottom plate, through holes are formed in the two side plates of the self-locking interlocking block, and the self-locking interlocking block is rotatably arranged on the shift piston rod through the two through holes.

[0015] The connecting groove of the self-locking interlocking block is formed in the bottom plate, and the selection shift knob is located between the two side plates of the self-locking interlocking block.

[0016] Further, the bottom plate of the self-locking interlocking block is provided with an interlocking head on both sides.

[0017] Further, a limiting block is rotatably arranged on the shift piston rod, and the limiting block is fixedly connected with one side plate of the self-locking interlocking block.

[0018] A self-locking interlocking block limiting groove is formed in the limiting block, and the self-locking interlocking block limiting groove is fan-shaped.

[0019] A limiting pin is arranged at the lower end of the shift mechanism shell, and the limiting pin is inserted into the self-locking interlocking block limiting groove.

[0020] Further, a self-locking hole is formed in the limiting block and is perpendicular to the shift piston rod.

[0021] A self-locking groove is formed in the corresponding position of the shift piston rod and the self-locking hole, and the limiting block and the shift piston rod can be locked by using a self-locking pin in the self-locking hole and the self-locking groove.

[0022] Further, the shift selection knob is provided with a through connection hole, and the shift piston rod is provided with a positioning hole corresponding to the connection hole.

[0023] Further, the self-locking pin is sleeved with a spring.

[0024] The upper portion of the self-locking hole of the limiting block is provided with a snap spring, and the upper portion of the self-locking pin is provided with a baffle between the spring and the snap spring.

[0025] Further, the shift selection piston rod is provided with a rotating groove at the end, and the shift selection knob is rotated into the rotating groove of the shift selection piston rod.

[0026] Compared with the prior art, the parallel shaft structure shift system for the gearbox has the following technical effects:

[0027] The parallel shaft structure shift system for the gearbox integrates the shift selection, shift, self-locking, auxiliary gearbox and interlocking device in the shift mechanism assembly, so that the shift self-locking function and the interlocking function are realized.

[0028] In addition, the parallel shaft structure shift system for the gearbox simplifies the shift fork assembly structure by setting the shift fork groove on the shift fork, and only contains the shift fork and the shift fork shaft. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a whole structure schematic view of the parallel shaft structure shift system for the gearbox of the utility model;

[0030] Figure 2 It is a front view of the parallel shaft structure shift system for the gearbox of the utility model;

[0031] Figure 3 It is a shift fork assembly structure schematic view in the utility model;

[0032] Figure 4 It is a shift mechanism assembly structure schematic view in the utility model;

[0033] Figure 5 It is a self-locking interlocking block sectional view in the utility model;

[0034] Figure 6 It is a self-locking interlocking block structure schematic view in the utility model;

[0035] Figure 7 is the selected gear shift knob structure schematic diagram in the utility model;

[0036] Figure 8 is the gear shift piston rod structure schematic diagram in the utility model.

[0037] The meaning of each reference numeral in the figure is:

[0038] 1, fork shaft; 2, first fork; 3, second fork; 4, third fork; 5, fork groove; 6, gear shift mechanism housing; 7, gear selection cylinder; 8, gear shift cylinder; 9, auxiliary box cylinder; 10, gear selection piston rod; 11, gear shift piston rod; 12, self-locking interlocking block; 1201, connecting groove; 13, interlocking head; 14, gear selection and gear shift knob; 15, gear selection knob; 16, gear shift knob; 17, limiting block; 1701, self-locking interlocking block limiting groove; 18, limiting pin; 19, self-locking hole; 20, self-locking groove; 21, self-locking pin; 22, connecting hole; 23, positioning hole. DETAILED DESCRIPTION

[0039] It should be noted that all components in the utility model, such as no special instructions, all adopt the components known in the prior art. For example, the fork shaft adopts the commonly used fork shaft.

[0040] The following gives the specific embodiments of the utility model, it should be noted that the utility model is not limited to the following specific embodiments, and any equivalent variations made on the basis of the technical solutions of the present application fall within the scope of protection of the utility model.

[0041] As Figures 1-4 shown, a gear shift system of parallel shaft structure for gearbox, including fork assembly, the fork assembly includes transversely arranged fork shaft 1, the fork shaft 1 is sleeved with first fork 2, second fork 3 and third fork 4;First fork 2, second fork 3 and third fork 4 can be respectively slid along the fork shaft 1 transversely and can rotate around the center axis of fork shaft 1, characterized in that, the side away from the fork shaft 1 of first fork 2, second fork 3 and third fork 4 is provided with fork groove 5;The gear shift mechanism assembly is arranged above the fork assembly;

[0042] The gear shift mechanism assembly includes gear shift mechanism housing 6, the gear shift mechanism housing 6 lower end surface is integrated with gear selection cylinder 7, gear shift cylinder 8 and auxiliary box cylinder 9;

[0043] The gear selection cylinder 7 includes gear selection piston rod 10, the gear selection cylinder 7 can drive the longitudinal movement of gear selection piston rod 10;

[0044] The gear shift cylinder 8 includes gear shift piston rod 11, the gear shift cylinder 8 can drive the horizontal movement and rotation around the center axis of gear shift piston rod 11;

[0045] When the gear shifting system of parallel shaft structure for gearbox is in neutral position, the fork grooves 5 of the first fork 2, the second fork 3 and the third fork 4 are aligned and arranged in a circular arc around the central axis of the gear shifting piston rod 11; the fork shaft 1 is parallel to and different from the gear shifting piston rod 11;

[0046] A self-locking interlocking block 12 is rotatably sleeved on the gear shifting piston rod 11; a through connecting groove 1201 is formed in the self-locking interlocking block 12; an interlocking head 13 is arranged at the bottom of the self-locking interlocking block 12, and the self-locking interlocking block 12 can drive the interlocking head 13 to be clamped into the corresponding fork groove 5 by rotating itself;

[0047] A gear shifting selection head 14 is also fixedly sleeved on the gear shifting piston rod 11, and a gear selection head 15 and a gear shifting head 16 are arranged on the upper and lower sides of the gear shifting selection head 14, respectively; the gear selection head 15 is rotatably connected with the gear selection piston rod 10, and the gear shifting head 16 enters the connecting groove 1201 of the self-locking interlocking block 12 from top to bottom and extends out of the lower end of the connecting groove 1201.

[0048] The first fork 2, the second fork 3 and the third fork 4 are all in clearance fit with the fork shaft 1, and the connection mode of the fork on the fork shaft, as well as the shape and structure of the fork are known in the prior art. The self-locking interlocking block 12 is in clearance fit with the gear shifting piston rod 11.

[0049] The gear shifting system of parallel shaft structure for gearbox of the embodiment is used to complete gear selection and gear shifting through the following operations:

[0050] The gear selection cylinder 7 drives the gear selection piston rod 10 to reciprocate along the transverse direction, thereby driving the gear selection and gear shifting head 14 to rotate. The gear shifting head 16 of the gear selection and gear shifting head 14 is clamped into the self-locking interlocking block connecting groove 1201 of the self-locking interlocking block 12, and the gear selection and gear shifting head 14 drives the self-locking interlocking block 12 to rotate when rotating, thereby making the interlocking head 13 of the self-locking interlocking block 12 align with the fork groove 5 of the first fork 2, the second fork 3 or the third fork 4, and thereby selecting different gears;

[0051] During gear shifting, the gear shifting cylinder 8 drives the gear shifting piston rod 11 to reciprocate along the transverse direction, thereby making the gear shifting head 16 of the gear selection and gear shifting head 14 drive the corresponding fork to move transversely, and thereby realizing gear shifting.

[0052] It should be noted that the corresponding gears of the fork are determined by actual requirements, which are not within the research scope of the embodiment, and the person skilled in the art can correspond the fork to different gears of the automobile according to actual requirements.

[0053] As a preferred solution, the self-locking interlocking block 12 is a "U"-shaped structure formed by two side plates and a bottom plate; through holes are formed in the two side plates of the self-locking interlocking block 12, and the self-locking interlocking block 12 is rotatably sleeved on the gear shifting piston rod 11 through the two through holes.

[0054] The connecting groove 1201 of the self-locking interlocking block 12 is arranged on the bottom plate, and the gear shifting knob 14 is located between the two side plates of the self-locking interlocking block 12.

[0055] As a preferred solution, the bottom plate of the self-locking interlocking block 12 is provided with an interlocking head 13 on both sides.

[0056] As a preferred solution, the gear shifting piston rod 11 is further provided with a limiting block 17 rotatably sleeved thereon, and the limiting block 17 is fixedly connected with one side plate of the self-locking interlocking block 12.

[0057] The limiting block 17 is provided with a self-locking interlocking block limiting groove 1701, which is a fan-shaped circular arc structure.

[0058] The gear shifting mechanism shell 6 is provided with a limiting pin 18 at the lower end, which is inserted into the self-locking interlocking block limiting groove 1701 inside the limiting block 17.

[0059] When the device needs to be self-locked, the self-locking interlocking block 12 cannot move axially because the self-locking interlocking block 12 is connected with the limiting block 17 and the limiting pin 18 is inserted into the self-locking interlocking block limiting groove 1701 inside the limiting block 17, thereby achieving self-locking.

[0060] When the device needs to be interlocked, the gear shifting knob 16 of the gear shifting knob 14 is located in the fork groove 5 on the first fork 2, and the two interlocking heads 13 of the interlocking self-locking block 12 are respectively located in the fork groove 5 on the second fork 3 and the third fork 4. When the gear is engaged, the gear shifting knob 16 can only drive the corresponding fork to move axially, and the other two forks cannot move axially due to the presence of the interlocking self-locking block 12, thereby achieving interlocking when the gear is engaged.

[0061] When the gear shifting knob 16 of the gear shifting knob 14 is rotated into the fork groove 5 of the second fork 3, the interlocking self-locking block 12 is rotated by the gear shifting knob 14, and the interlocking head 13 of the interlocking self-locking block 12 is located in the fork groove 5 of the first fork 2 and the third fork 4 to prevent it from moving axially, thereby achieving interlocking.

[0062] Similarly, when the gear shifting knob 16 of the gear shifting knob 14 is rotated into the fork groove 5 of the third fork 4, interlocking can also be achieved.

[0063] As a preferred solution, the limiting block 17 is further provided with a through self-locking hole 19.

[0064] The gear shifting piston rod 11 is provided with a self-locking groove 20 at the corresponding position; the limiting block 17 and the gear shifting piston rod 11 can be locked by using the self-locking pin 21 through the self-locking hole 19 and the self-locking groove 20.

[0065] Further preferably, the self-locking pin 21 is sleeved with a spring;

[0066] The upper part of the self-locking hole 19 of the limiting block 17 is provided with a circlip, and the upper part of the self-locking pin 21 is provided with a baffle between the spring and the circlip. The circlip is assembled at the end of the self-locking hole 19 to prevent the baffle from being ejected.

[0067] As a preferred solution, the selected gear shifting knob 14 is provided with a through connecting hole 22, and the gear shifting piston rod 11 is provided with a positioning hole 23 corresponding to the connecting hole. In use, the connecting pin can be inserted into the positioning hole 23 and the connecting hole 22 to further fix the selected gear shifting knob 14 and the gear shifting piston rod 11.

[0068] The gear shifting system of the parallel shaft structure of the gearbox of the embodiment is arranged in parallel with but different from the shift fork shaft 1, the gear shifting mechanism assembly is arranged directly above the shift fork assembly, the gear shifting mechanism assembly is not staggered in the axial direction, and the axial length of the gear shifting mechanism assembly is short. The gear shifting mechanism assembly does not occupy the clutch housing space, the integration degree of the interlocking and self-locking functions is high, and the motor of the hybrid gearbox is convenient to arrange.

Claims

1. A gear shifting system of parallel shaft structure for a gearbox, comprising a shift fork assembly, said shift fork assembly comprising a transversely arranged shift fork shaft (1) and a first shift fork (2), a second shift fork (3) and a third shift fork (4) sleeved on the shift fork shaft (1); said first shift fork (2), second shift fork (3) and third shift fork (4) are capable of sliding transversely along the shift fork shaft (1) and capable of rotating around the central axis of the shift fork shaft (1), characterized in that, The first shift fork (2), the second shift fork (3) and the third shift fork (4) are provided with shift fork grooves (5) of the same specification on the side away from the shift fork shaft (1); The shift mechanism assembly is provided above the shift fork assembly; the shift mechanism assembly comprises a shift mechanism housing (6), and the shift mechanism housing (6) is integrated with a selection cylinder (7), a shift cylinder (8) and a sub-gearbox cylinder (9) on the lower end face; The selection cylinder (7) comprises a selection piston rod (10), and the selection cylinder (7) can drive the selection piston rod (10) to move longitudinally; The shift cylinder (8) comprises a shift piston rod (11), and the shift cylinder (8) can drive the shift piston rod (11) to move transversely and rotate around the central axis thereof; When the parallel shaft structure shift system of the gearbox is in the neutral state, the shift fork grooves (5) of the first shift fork (2), the second shift fork (3) and the third shift fork (4) are aligned and arranged in a circular arc shape around the central axis of the shift piston rod (11); the shift fork shaft (1) is parallel to and different from the shift piston rod (11). A self-locking interlocking block (12) is rotatably arranged on the shift piston rod (11); the self-locking interlocking block (12) is provided with a through connecting groove (1201); the bottom of the self-locking interlocking block (12) is provided with an interlocking head (13), and the self-locking interlocking block (12) can drive the interlocking head (13) to be clamped into the corresponding shift fork groove (5) by rotating itself; A selection and shift knob (14) is further fixedly arranged on the shift piston rod (11), and the selection and shift knob (14) is provided with a selection knob (15) and a shift knob (16) on the upper side and the lower side, respectively; the selection knob (15) is rotatably connected with the selection piston rod (10), and the shift knob (16) enters the connecting groove (1201) of the self-locking interlocking block (12) from top to bottom and extends out of the lower end of the connecting groove (1201).

2. The shift system of claim 1, wherein The self-locking interlocking block (12) has a "U"-shaped structure formed by two side plates and a bottom plate; the two side plates of the self-locking interlocking block (12) are both provided with through holes, and the self-locking interlocking block (12) is rotatably arranged on the shift piston rod (11) through the two through holes thereof; The connecting groove (1201) of the self-locking interlocking block (12) is arranged on the bottom plate, and the selection and shift knob (14) is located between the two side plates of the self-locking interlocking block (12).

3. The shift system of claim 2, wherein the shift system further comprises a shift lever, a shift cable, and a shift cable bracket, wherein the shift lever is connected to the shift cable, and the shift cable is connected to the shift cable bracket, and the shift cable bracket is connected to the shift drum. The bottom of the bottom plate of the self-locking interlocking block (12) is provided with the interlocking head (13) on both sides.

4. The shift system of claim 2, wherein A limiting block (17) is further rotatably arranged on the shift piston rod (11), and the limiting block (17) is fixedly connected with one side plate of the self-locking interlocking block (12); The limiting block (17) is provided with a self-locking interlocking block limiting groove (1701), and the self-locking interlocking block limiting groove (1701) is fan-shaped; The shift mechanism housing (6) is provided with a limiting pin (18) at the lower end, and the limiting pin (18) is inserted into the self-locking interlocking block limiting groove (1701).

5. The shift system of claim 4, wherein the shift system further comprises a shift lever for shifting the gear of the transmission, and a shift cable for transmitting a shift operation of the shift lever to the shift drum. The limiting block (17) is further provided with a self-locking hole (19) penetrating and perpendicular to the gear shifting piston rod (11); The gear shifting piston rod (11) is provided with a self-locking groove (20) corresponding to the self-locking hole (19); the limiting block (17) and the gear shifting piston rod (11) can be locked by using a self-locking pin (21) on the self-locking hole (19) and the self-locking groove (20).

6. The shift system of claim 5, wherein the shift system is configured to perform the shift operation by moving the shift fork in the direction of the axis of the shift drum. The gear shifting piston rod (11) is provided with a self-locking groove (20) corresponding to the self-locking hole (19); the limiting block (17) and the gear shifting piston rod (11) can be locked by using a self-locking pin (21) on the self-locking hole (19) and the self-locking groove (20).

7. The shift system of claim 6, wherein the shift system further comprises a shift lever, a shift cable, and a shift cable bracket, wherein the shift lever is connected to the shift cable, and the shift cable is connected to the shift cable bracket, and the shift cable bracket is connected to the shift drum. The self-locking pin (21) is provided with a spring; The self-locking hole (19) of the limiting block (17) is provided with a clamping spring at the upper part; the self-locking pin (21) is provided with a baffle at the upper part, and the baffle is located between the spring and the clamping spring.

8. The shift system of claim 1, wherein the shift system is configured to perform a shift operation of the transmission by moving the shift fork in the direction of the axis of the shift fork. The gear shifting piston rod (10) is provided with a rotating groove at the end; the gear shifting knob (15) is rotated into the rotating groove of the gear shifting piston rod (10).

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