Transmission shifting fork and automobile

Abstract

The transmission shifting fork comprises a shifting fork assembly and a shifting positioning pin connected with the shifting fork assembly, the shifting fork assembly comprises a shifting fork body and a shifting fork sleeve, the shifting fork body comprises a mounting portion, the mounting portion is of an arc-shaped structure, a first clamping portion is arranged in the middle of the inner side wall of the mounting portion, and a second clamping portion is arranged in the middle of the inner side wall of the mounting portion. Second clamping parts are arranged at the two ends of the inner side wall of the mounting part respectively, and clamping holes are formed in the first clamping parts and the second clamping parts respectively; the shifting fork sleeve is matched with the mounting part, a containing groove is formed in the shifting fork sleeve and used for containing the first clamping part and the second clamping part, clamping columns are arranged at the positions, corresponding to the first clamping part and the second clamping part, in the containing groove respectively, and the clamping columns are matched with the clamping holes. The shifting fork sleeve is detachably connected with the shifting fork body, replacement is convenient and fast when the shifting fork sleeve is damaged, maintenance cost can be reduced, the shifting fork sleeve is more tightly attached to the circumferential side face of the synchronizer when the shifting fork sleeve is used, the contact area between the shifting fork sleeve and the synchronizer is increased, and stress is more uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a transmission shift fork and an automobile. Background Art

[0002] The shift fork is a component on the car gearbox, mainly used for shifting the car gearbox. The transmission uses the shift fork structure to push the synchronizer to move for shifting, thereby realizing the use of different gear pairs to obtain different speed ratios, so as to output appropriate torque and speed to transmit power and adapt to the car's requirements for traction and driving speed under different road conditions.

[0003] Currently, if Figure 1 As shown, the shift fork body 10 in the transmission generally includes a mounting portion 11 and a sleeve portion arranged on the outside of the mounting portion 11, the sleeve portion is used to install the shift locating pin, and an abutment ring 1a is integrally provided on the inner side of the mounting portion 11, and the side of the abutment ring 1a facing away from the mounting portion 11 is used to abut against the circumferential side of the synchronizer. However, in actual use of the above-mentioned shift fork body, the abutment between the shift fork body and the synchronizer is not stable, the shift fork body is unevenly stressed during shifting, the second gear is prone to tooth knocking during durability tests, the linear bearings inside the first and second gear shift fork assemblies are prone to serious indentations, and the abutment surface on the abutment ring is damaged by friction due to long-term use, so the entire shift fork body can only be replaced, and the maintenance cost is high. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a transmission shift fork and a vehicle, aiming to solve the technical problems in the prior art that the abutment between the fork body and the synchronizer is not stable, the fork body is subjected to uneven force during shifting, the second gear is prone to tooth knocking during durability tests, the linear bearings inside the first and second gear shift fork assemblies are prone to severe indentations, and the abutment surface on the abutment ring can only be replaced after being damaged by friction due to long-term use, resulting in high maintenance costs.

[0005] The utility model provides a transmission shift fork, comprising a fork assembly and a shift positioning pin connected to the fork assembly, wherein the fork assembly comprises a fork body and a fork sleeve detachably connected to the fork body, wherein the fork body comprises a mounting portion, wherein the mounting portion is an arc-shaped structure, wherein a first clamping portion is provided at the middle of an inner side wall of the mounting portion, and second clamping portions are provided at both ends of the inner side wall of the mounting portion, wherein the first clamping portion and the second clamping portion are respectively provided with clamping holes at one side close to the center of the mounting portion;

[0006] The fork sleeve is adapted to the mounting portion, and a receiving groove is provided on the fork sleeve, and the receiving groove is used to accommodate the first clamping portion and the second clamping portion. Positions corresponding to the first clamping portion and the second clamping portion in the receiving groove are respectively provided with clamping columns, and the clamping columns are adapted to the clamping holes.

[0007] Compared with the prior art, the transmission shift fork of the utility model has the following beneficial effects: the shift fork sleeve in the utility model is an independent structure, which is detachably connected to the shift fork body, and is easy to replace when damaged, and the use performance is improved, which can reduce the maintenance cost. Compared with the shift fork structure in the prior art, the shift fork in the utility model is more closely attached to the circumferential side of the synchronizer when in use, which can increase the contact area between the shift fork and the synchronizer, so that the force is more uniform. Specifically, the inner side wall of the mounting portion on the shift fork body is provided with a first clamping portion and a second clamping portion, and the first clamping portion and the second clamping portion are provided with a clamping hole, and the receiving groove on the shift fork sleeve is provided with a clamping hole adapted to the clamping hole, and the shift fork sleeve is fixedly installed on the shift fork body by clamping the clamping column into the clamping hole. In this way, the diameter of the mounting opening on the shift fork body is reduced by setting the connection point structure such as the first clamping portion and the second clamping portion, so that the overall size of the adapted shift fork sleeve is also reduced accordingly. Furthermore, a clamping hole for connecting the fork sleeve is provided on one side of the first clamping portion and the second clamping portion near the center of the mounting portion, and the fork sleeve is fixed on the fork body by clamping the clamping column into the clamping hole, and the inner diameter of the connecting plate on the fork sleeve is further restricted to fit more closely with the circumferential side of the synchronizer.

[0008] In addition, the transmission shift fork according to the utility model may also have the following additional technical features:

[0009] Furthermore, the two ends of the first clamping portion are smoothly connected to one end of the second clamping portion through a connecting bridge portion, respectively, the other end of the second clamping portion is arranged flush with the end of the mounting portion, and the side of the first clamping portion and the second clamping portion that are away from the inner side wall of the mounting portion both exceed the side of the connecting bridge portion that are away from the inner side wall of the mounting portion.

[0010] Furthermore, the inner diameter of the fork sleeve ranges from 110.4 mm to 111.2 mm.

[0011] Furthermore, the two second clamping portions are symmetrically arranged with respect to the first clamping portion.

[0012] Furthermore, the clamping hole is a U-shaped hole, and the opening of the U-shaped hole faces the center of the mounting portion.

[0013] Furthermore, the fork body also includes a sleeve portion, and the outer wall of the mounting portion has the sleeve portions extending outward along both sides of the axial direction of the mounting portion slot, respectively. The two sleeve portions are independent of each other, and the sleeve portion is provided with a mounting through hole adapted to the shift locating pin, and the centers of the mounting through holes of the two sleeve portions are located on the same straight line.

[0014] Furthermore, the fork sleeve includes a connecting plate, which is an arc-shaped plate, and side plates are horizontally extended on both sides of the connecting plate in a direction away from the center of the connecting plate. The connecting plate and the two side plates together form the accommodating groove, and the clamping columns are respectively provided in the middle of one side and at both ends of the connecting plate located in the accommodating groove.

[0015] Furthermore, two ends of the connecting plate on a side away from the accommodating groove respectively have first abutting bosses extending toward a direction close to the center of the connecting plate.

[0016] Furthermore, second abutment bosses are respectively provided at both ends and a middle portion of a side of the side plate away from the accommodating groove.

[0017] Another aspect of the utility model provides a car, the car comprising the transmission shift fork. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a shift fork in the prior art;

[0019] Figure 2 It is a three-dimensional structural diagram of the transmission shift fork of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the transmission shift fork of the utility model at a certain viewing angle;

[0021] Figure 4 It is an exploded schematic diagram of the transmission shift fork of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the shift fork body in the transmission shift fork of the utility model at a certain viewing angle;

[0023] Figure 6 It is a three-dimensional structural diagram of a shift fork sleeve in a transmission shift fork of the utility model;

[0024] Figure 7 It is a structural schematic diagram of a shift fork sleeve in a transmission shift fork of the utility model at a certain viewing angle.

[0025] Among them, the above-mentioned drawings include the following figure marks: 10-fork body; 11-installation part; 1a-abutment ring; 12-first clamping part; 13-second clamping part; 14-connecting bridge part; 15-sleeve part; 101-clamping hole; 102-installation through hole; 20-fork sleeve; 21-connecting plate; 22-side plate; 23-clamping column; 24-first abutment boss; 25-second abutment boss; 30-positioning pin.

[0026] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] It should be noted that if Figure 1 As shown, the shift fork body 10 in the prior art includes a mounting portion 11 and a sleeve portion arranged on the outside of the shift fork mounting portion, and a semi-circular abutment ring 1a is provided on the inner side of the mounting portion 11, and the inner wall of the abutment ring 1a is used to engage with the circumferential surface of the synchronizer, and the inner diameter D of the abutment ring 1a ranges from 111.8mm to 112.6mm. In actual use, the engagement between the shift fork of this structure and the circumferential surface of the synchronizer is not very close, the abutment of the shift fork on the synchronizer is not stable, the shift fork is unevenly stressed during gear shifting, and the second gear is prone to tooth knocking during durability tests. The linear bearings inside the first and second gear shift fork assemblies are prone to serious indentation quality problems, and the abutment surface on the abutment ring is damaged by friction after long-term use, so the entire shift fork can only be replaced, and the maintenance cost is high.

[0031] See also Figures 2 to 7 The utility model discloses a transmission shift fork, comprising a shift fork assembly and a shift positioning pin 30 connected to the shift fork assembly, the shift fork assembly comprising a shift fork body 10 and a shift fork sleeve 20 connected to the shift fork body 10, the shift fork body 10 comprising a mounting portion 11, the mounting portion 11 is an arc-shaped structure, at least one first clamping portion 12 is provided in the middle of the inner side wall of the mounting portion 11, and second clamping portions 13 are respectively provided at both ends of the inner side wall of the mounting portion 11. Specifically, in the present embodiment, the mounting portion 11 is a semicircular ring structure, the inner side wall of the mounting portion 11 forms a semicircular opening, a first clamping portion 12 is vertically extended from the middle of the inner side wall of the mounting portion 11 toward the center direction of the mounting portion 11, and second clamping portions 13 are respectively extended vertically toward the center direction of the mounting portion 11 at both ends of the inner side wall of the mounting portion 11, and the total length direction of the first clamping portion 12 and the second clamping portion 13 is arranged along the circumferential direction of the inner side wall of the mounting portion 11.

[0032] Furthermore, the two ends of the first clamping portion 12 are smoothly connected to one end of the second clamping portion 13 through the connecting bridge portion 14 respectively, and the two second clamping portions 13 arranged on both sides of the mounting portion 11, the two connecting bridge portions 14 and the first clamping portion 12 arranged in the middle of the mounting portion 11 are integrally connected to form a clamping strip for clamping the fork sleeve 20, wherein the setting of the two connecting bridge portions 14 can enhance the stability of the first clamping portion 12 and the second clamping portion 13 on the inner side of the mounting portion 11, the other end of the second clamping portion 13 is flush with the end of the mounting portion 11, and the side of the first clamping portion 12 and the second clamping portion 13 that are away from the inner side wall of the mounting portion 11 both exceed the side of the connecting bridge portion 14 that are away from the inner side wall of the mounting portion 11, in other words, the side of the first clamping portion 12 and the second clamping portion 13 that are away from the inner side wall of the mounting portion 11 is protruding.

[0033] Furthermore, the first clamping portion 12 and the second clamping portion 13 are respectively provided with a clamping hole 101 on one side close to the center of the mounting portion 11. In the present embodiment, the clamping hole 101 is a U-shaped hole, and the opening of the U-shaped hole is arranged toward the center of the mounting portion 11. Specifically, the first clamping portion 12 is provided with a U-shaped hole in the middle part of one side close to the center of the mounting portion 11, and the second clamping portion 13 is provided with a U-shaped hole on one side close to the center of the mounting portion 11 and at one end close to the end of the mounting portion 11.

[0034] Furthermore, the thickness of the first clamping portion 12 is equal to the thickness of the second clamping portion 13 , and the thickness of the second clamping portion 13 is greater than the thickness of the connecting bridge portion 14 and less than the slot width of the accommodating slot 201 .

[0035] As a specific example, in this embodiment, the two second clamping portions 13 are symmetrically arranged with respect to the first clamping portion 12 .

[0036] Furthermore, the fork body 10 also includes a sleeve portion 15, and the outer wall of the mounting portion 11 has sleeve portions 15 extending outwardly on both sides of the axial direction of the slot of the mounting portion 11, and the two sleeve portions 15 are independent of each other. The sleeve portion 15 is provided with a mounting through hole 102 adapted to the shift positioning pin 30, and the centers of the mounting through holes 102 of the two sleeve portions 15 are located on the same straight line, and the center of the sleeve portion 15 is set away from the center of the mounting portion 11.

[0037] As an example, the fork sleeve 20 is adapted to the mounting portion 11, and a receiving groove 201 is provided on the fork sleeve 20. The receiving groove 201 is used to receive the first clamping portion 12 and the second clamping portion 13, and a clamping column 23 is respectively provided at a position corresponding to the first clamping portion 12 and the second clamping portion 13 in the receiving groove 201, and the clamping column 23 is adapted to the clamping hole 101. Specifically, the fork sleeve 20 includes a connecting plate 21, and the connecting plate 21 is an arc-shaped plate. Side plates 22 are respectively extended horizontally on both sides of the connecting plate 21 away from the center direction of the connecting plate 21. The connecting plate 21 and the two side plates 22 are combined to form the receiving groove 201, and clamping columns 23 are respectively provided in the middle of one side and at both ends of the connecting plate 21 located in the receiving groove 201. In the present embodiment, the fork sleeve 20 is a semicircular structure as a whole, and the inner wall of the fork sleeve 20, that is, the inner wall of the connecting plate 21, forms a semicircular opening, and the diameter d of the opening is smaller than the opening diameter between the two second clamping parts 13. The diameter d of the inner side of the fork sleeve 20 ranges from 110.4 mm to 111.2 mm. The diameter d of the inner side of the fork sleeve 20 in the present embodiment is 110.4 mm.

[0038] Furthermore, the two ends of the connecting plate 21 on the side away from the accommodating groove 201 are respectively provided with a first abutment boss 24 extending toward the center direction of the connecting plate 21, and the two ends and the middle part of the side plate 22 on the side away from the accommodating groove 201 are respectively provided with a second abutment boss 25. In other words, the two ends of the inner side of the fork sleeve 20 are respectively provided with a first abutment boss 24, and the two ends and the middle part of the upper and lower sides of the fork sleeve 20 are respectively provided with a second abutment boss 25. The first abutment boss 24 and the second abutment boss 25 are both used to abut with the corresponding structure on the synchronizer to improve the connection stability between the fork sleeve 20 and the synchronizer.

[0039] Furthermore, when the fork sleeve 20 is connected to the mounting portion 11 by the clamping column 23 being clamped into the clamping hole 101 , both ends of the fork sleeve 20 are beyond both ends of the mounting portion 11 .

[0040] Another aspect of the utility model provides a car, which comprises the above-mentioned transmission shift fork.

[0041] In actual use, the use principle of the transmission shift fork of the utility model can be: align the receiving groove 201 of the fork sleeve 20 into the mounting groove on the mounting portion 11, so that the three clamping columns 23 on the fork sleeve 20 are respectively correspondingly clamped into the clamping holes 101 on the first clamping portion 12 and the second clamping portion 13, and when the clamping columns 23 are completely clamped into the clamping holes 101, the fork sleeve 20 will be firmly installed on the mounting portion 11. As can be seen from the above, in this embodiment, the fork sleeve 20 is fixedly installed on the fork body 10 through the clamping points set on the first clamping portion 12 and the two second clamping portions 13, and the first clamping portion 12 is located between the two second clamping portions 13, that is, the installation of the fork sleeve 20 on the fork body 10 is realized through three connection points, and the middle part and both ends of the fork sleeve 20 are firmly fixed on the fork body 10 through the setting of the three connection points, so that the stable connection between the fork sleeve 20 and the fork body 10 can be realized. It should be noted that the installation of the fork sleeve 20 on the fork body 10 in the present invention is not limited to the design of the above three connection points, and more than three connection points may be designed to achieve the fixation of the two.

[0042] In summary, the beneficial effects of the transmission shift fork of the utility model are as follows: the shift fork in the utility model is an independent structure, which is detachably connected to the shift fork body, and the shift fork sleeve is easy to replace when damaged, the use performance is improved, and the maintenance cost can be reduced. Compared with the shift fork structure in the prior art, the shift fork in the utility model is more closely attached to the circumferential side of the synchronizer when in use, which can increase the contact area between the shift fork and the synchronizer, making the force more uniform. When actually used in the synchronizer, since the first clamping part and the second clamping part on the mounting part of the shift fork body are designed to protrude from the connecting bridge part, the opening diameter between the two second clamping parts is smaller than the opening diameter formed by the inner side wall of the mounting part. In other words, the diameter of the mounting opening on the shift fork body is reduced by setting the first clamping part, the second clamping part and other connection point structures, so that the overall size of the adapted shift fork sleeve is also reduced accordingly. Furthermore, a clamping hole for connecting the shift fork sleeve is provided on one side of the first clamping portion and the second clamping portion near the center of the mounting portion, and the shift fork sleeve is fixed on the shift fork body by clamping the clamping column into the clamping hole. The inner diameter of the connecting plate on the shift fork sleeve is slightly smaller than the opening diameter between the two second clamping portions. Compared with the shift fork structure in the prior art, when the shift fork in the utility model is actually used in the synchronizer, the shift fork and the circumferential surface of the synchronizer are more closely attached, the contact area between the two is increased, and the force is more uniform, which can effectively reduce the situation of second gear tooth hitting in the durability test and improve the overall performance.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A transmission shift fork, characterized in that: It comprises a fork assembly and a shift positioning pin connected to the fork assembly, the fork assembly comprises a fork body and a fork sleeve detachably connected to the fork body, the fork body comprises a mounting portion, the mounting portion is an arc-shaped structure, a first clamping portion is provided in the middle of an inner side wall of the mounting portion, and second clamping portions are respectively provided at both ends of the inner side wall of the mounting portion, and a clamping hole is respectively provided on one side close to the center of the mounting portion; The fork sleeve is adapted to the mounting portion, and a receiving groove is provided on the fork sleeve, and the receiving groove is used to accommodate the first clamping portion and the second clamping portion. Positions corresponding to the first clamping portion and the second clamping portion in the receiving groove are respectively provided with clamping columns, and the clamping columns are adapted to the clamping holes.

2. The transmission shift fork according to claim 1, characterized in that: The two ends of the first clamping portion are smoothly connected to one end of the second clamping portion through a connecting bridge portion, respectively, the other end of the second clamping portion is arranged flush with the end of the mounting portion, and the side of the first clamping portion and the second clamping portion that are away from the inner side wall of the mounting portion both exceed the side of the connecting bridge portion that are away from the inner side wall of the mounting portion.

3. The transmission shift fork according to claim 1, characterized in that: The inner diameter of the fork sleeve ranges from 110.4 mm to 111.2 mm.

4. The transmission shift fork according to claim 1, characterized in that: The two second clamping portions are symmetrically arranged with respect to the first clamping portion.

5. The transmission shift fork according to claim 1, characterized in that: The clamping hole is a U-shaped hole, and the opening of the U-shaped hole faces the center of the mounting portion.

6. The transmission shift fork according to claim 1, characterized in that: The fork body also includes a sleeve portion, and the outer wall of the mounting portion has the sleeve portions extending outwardly on both sides of the axial direction of the mounting portion slot, respectively. The two sleeve portions are independent of each other, and the sleeve portion is provided with a mounting through hole adapted to the shift positioning pin, and the centers of the mounting through holes of the two sleeve portions are located on the same straight line.

7. The transmission shift fork according to claim 1, characterized in that: The fork sleeve includes a connecting plate, which is an arc-shaped plate. Side plates are horizontally extended on both sides of the connecting plate away from the center of the connecting plate. The connecting plate and the two side plates are combined to form the accommodating groove. The clamping columns are respectively provided on the middle part and both ends of one side of the connecting plate located in the accommodating groove.

8. The transmission shift fork according to claim 7, characterized in that: Two ends of the connecting plate on one side away from the containing groove respectively extend toward the center of the connecting plate to form a first abutting boss.

9. The transmission shift fork according to claim 7, characterized in that: Second abutment bosses are respectively disposed at both ends and a middle portion of a side of the side plate away from the accommodating groove.

10. An automobile, characterized in that: The motor vehicle comprises a transmission shift fork according to any one of claims 1 to 9.

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