Hybrid shifting fork assembly of automobile transmission
By employing a design that combines wave blocks and shift forks within the gearbox, along with a magnetic sensing component, the problem of inaccurate shifting in traditional shift fork assemblies has been solved, achieving a stable and precise shifting process while reducing noise and costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-03-31
AI Technical Summary
The shift fork assembly in a traditional gearbox cannot meet the accuracy requirements of the shift position, resulting in inaccurate shifting.
The first, second, third, and fourth shift forks are fixedly connected to the waveform block, which cooperates with the waveform groove in the gearbox to achieve stable movement. Combined with the magnetic induction component and the sensor in the gearbox, it can accurately shift gears.
It achieves a stable and precise shifting process, reduces noise and costs, and improves shifting efficiency and wear resistance.
Smart Images
Figure CN224064813U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive shifting technology, specifically to a hybrid shift fork assembly for an automotive transmission. Background Technology
[0002] The shift fork is a key shifting component in a car transmission. Plastic bushings at both ends of the shift fork shaft connect to steel sleeves at both ends of the transmission. The shift fork fork itself connects to the transmission gear sleeve, and the shift fork magnet assembly connects to the transmission signal detection device. In operation, a hydraulic system pushes both ends of the shift fork shaft, while the shift fork fork axially pushes the gear sleeve. During this movement, the transmission detection device detects the position signal of the magnet, determines the shift travel position, and ultimately achieves the shift fork's shifting function.
[0003] Currently, the structure of the shift fork assembly in traditional gearboxes cannot meet the shifting requirements, resulting in inaccurate shifting positions. Utility Model Content
[0004] This invention provides a hybrid shift fork assembly for an automotive transmission, aiming to solve the problems in the prior art.
[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:
[0006] A hybrid shift fork assembly for an automotive transmission includes a first shift fork, a second shift fork, a third shift fork, and a fourth shift fork. The second shift fork and the third shift fork are distributed opposite to each other. The first shift fork and the fourth shift fork are distributed opposite to each other, and the first shift fork is located on the side away from the second and third shift forks. The first, second, third, and fourth shift forks are fixedly connected to one end of a wave block, and the end faces of the other ends of the four wave blocks are respectively corrugated to cooperate with the wave grooves in the corresponding parts of the transmission.
[0007] The beneficial effects of this utility model are: during the shifting process, the first shift fork, the second shift fork, the third shift fork and the fourth shift fork respectively utilize the waveform blocks on them to cooperate with the waveform grooves in the corresponding parts of the gearbox to achieve stable movement of the first shift fork, the second shift fork, the third shift fork and the fourth shift fork, thereby achieving stable shifting and high shifting accuracy.
[0008] This utility model has a compact structure and occupies little space. The shift fork assembly is installed in the gearbox to realize gear shifting and speed change. The shifting accuracy and efficiency are high, and it has good wear resistance, good noise reduction effect, and low cost.
[0009] Based on the above technical solution, the present invention can be further improved as follows.
[0010] Furthermore, the first shift fork, the second shift fork, the third shift fork, and the fourth shift fork are respectively fixedly connected to one end of the magnet bracket; the other end of the four magnet brackets is respectively fixedly connected to a magnet sensing component, and the four magnet sensing components are respectively used to cooperate with the sensors inside the gearbox.
[0011] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The magnetic sensing component works with the sensor in the gearbox so that the system can sense the position information of the shift fork and achieve accurate positioning.
[0012] Furthermore, the four magnet supports are each in the form of a bent plate structure.
[0013] The advantages of adopting the above-mentioned further solution are that the structure is simple, the shape of the four magnet supports is reasonably designed, it is easy to assemble, and it saves space.
[0014] Furthermore, the first shift fork, the second shift fork, and the third shift fork each include a shift fork body and a shift fork bracket, and the fourth shift fork includes the shift fork bracket and two shift fork bodies. The shift fork bodies of the first, second, and third shift forks are respectively fixedly mounted on their corresponding shift fork brackets, and the two shift fork bodies of the fourth shift fork are relatively fixedly mounted on their corresponding shift fork brackets, with each shift fork body distributed perpendicular to its corresponding shift fork bracket; the four wave blocks and the four magnet brackets are respectively fixedly mounted on the four shift fork brackets.
[0015] The advantages of adopting the above-mentioned further scheme are that the structure is simple, and the No. 1 shift fork, No. 2 shift fork, No. 3 shift fork and No. 4 shift fork are respectively composed of shift fork bracket and shift fork body, which is convenient to process and has high efficiency.
[0016] Furthermore, each of the five shift fork bodies has an arc-shaped structure, and a portion of each body is fixedly connected to one of the four shift fork supports.
[0017] The advantages of adopting the above-mentioned further solutions are that the shift fork body has a simple structure, a reasonable shape design, and is convenient for shifting operations.
[0018] Furthermore, fork foot inserts are fixedly installed at both ends of the five fork bodies.
[0019] The advantages of adopting the above-mentioned further solution are that the fork insert is made of wear-resistant plastic ultrasonic welding, which reduces noise and has a lower cost than the traditional plastic coating process.
[0020] Furthermore, a midpoint insert is fixedly installed in the middle part of each of the five shift fork bodies.
[0021] The advantages of adopting the above-mentioned further solution are that the intermediate point insert is made of wear-resistant plastic ultrasonic welding, which reduces noise and has a lower cost than the traditional plastic coating process.
[0022] Furthermore, reinforcing plates are fixedly installed on the fork bodies of the first, second, and third shift forks, as well as between the two fork bodies of the fourth shift fork.
[0023] The advantages of adopting the above-mentioned further solution are that the structure is simple, the reinforcing plate is reasonably designed, the reinforcing plate can enhance the strength of the entire shift fork, extend its service life, and the cost is low.
[0024] Furthermore, bushings are fitted at both ends of the four fork supports.
[0025] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. Each shift fork bracket is connected to the gearbox at both ends by bushings, which reduces wear and lowers costs.
[0026] Furthermore, the eight bushings are respectively connected to the two ends of the four shift fork supports by elastic pins.
[0027] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The use of elastic pins can prevent the bushing from slipping off the end of the corresponding shift fork bracket, thus ensuring the stability of the bushing assembly. Attached Figure Description
[0028] Figure 1 This is one of the overall structural schematic diagrams of this utility model;
[0029] Figure 2 This is the second schematic diagram of the overall structure of this utility model;
[0030] Figure 3 This is a three-dimensional structural diagram of the No. 1 shift fork in this utility model;
[0031] Figure 4 This is one of the planar schematic diagrams of the No. 1 shift fork in this utility model;
[0032] Figure 5 This is the second planar schematic diagram of the first shift fork in this utility model;
[0033] Figure 6 This is a three-dimensional structural diagram of the No. 2 shift fork in this utility model;
[0034] Figure 7 This is one of the planar schematic diagrams of the No. 2 shift fork in this utility model;
[0035] Figure 8 This is the second planar schematic diagram of the No. 2 shift fork in this utility model;
[0036] Figure 9 This is a three-dimensional structural diagram of the No. 3 shift fork in this utility model;
[0037] Figure 10 This is one of the planar schematic diagrams of the No. 3 shift fork in this utility model;
[0038] Figure 11 This is the second planar schematic diagram of the No. 3 shift fork in this utility model;
[0039] Figure 12 This is a three-dimensional structural diagram of the No. 4 shift fork in this utility model;
[0040] Figure 13 This is one of the planar schematic diagrams of the No. 4 shift fork in this utility model;
[0041] Figure 14 This is the second planar schematic diagram of the No. 4 shift fork in this utility model.
[0042] The attached diagram lists the components represented by each number as follows:
[0043] 1. Shift fork No. 1; 2. Shift fork No. 2; 3. Shift fork No. 3; 4. Shift fork No. 4; 5. Wave block; 6. Magnet bracket; 7. Magnet induction component; 8. Shift fork body; 9. Shift fork bracket; 10. Fork foot insert; 11. Midpoint insert; 12. Reinforcing plate; 13. Bushing; 14. Spring pin. Detailed Implementation
[0044] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.
[0045] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0047] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0048] Example 1
[0049] like Figures 1 to 14 As shown, this embodiment provides a hybrid shift fork assembly for an automotive transmission, including a first shift fork 1, a second shift fork 2, a third shift fork 3, and a fourth shift fork 4. The second shift fork 2 and the third shift fork 3 are distributed opposite to each other. The first shift fork 1 and the fourth shift fork 4 are distributed opposite to each other, and are located on the side away from each other of the second shift fork 2 and the third shift fork 3. The first shift fork 1, the second shift fork 2, the third shift fork 3, and the fourth shift fork 4 are respectively fixedly connected to one end of a wave block 5. The end faces of the four wave blocks 5 are respectively corrugated, which are used to cooperate with the wave grooves in the corresponding parts of the transmission.
[0050] During gear shifting, shift fork 1, shift fork 2, shift fork 3 and shift fork 4 utilize the waveform block 5 on them to cooperate with the waveform groove in the corresponding part of the gearbox to achieve stable movement of shift fork 1, shift fork 2, shift fork 3 and shift fork 4, thereby achieving stable gear shifting and high shifting accuracy.
[0051] Preferably, in this embodiment, the four wave-shaped blocks 5 are respectively L-shaped block structures, with one end fixedly connected to the first shift fork 1, the second shift fork 2, the third shift fork 3 and the fourth shift fork 4, and the end face of the other end is respectively corrugated.
[0052] This embodiment has a compact structure and occupies little space. The shift fork assembly is installed inside the gearbox to realize gear shifting. The shifting accuracy and efficiency are high, and it has good wear resistance, good noise reduction effect, and low cost.
[0053] Example 2
[0054] Based on Embodiment 1, in this embodiment, the first shift fork 1, the second shift fork 2, the third shift fork 3 and the fourth shift fork 4 are respectively fixedly connected to one end of the magnet bracket 6; the other end of the four magnet brackets 6 is respectively fixedly connected to a magnet sensing component 7, and the four magnet sensing components 7 are respectively used to cooperate with the sensors inside the gearbox.
[0055] The solution has a simple structure and reasonable design. The magnetic sensing component 7 works in conjunction with the sensor in the gearbox so that the system can sense the position information of the shift fork and achieve accurate positioning.
[0056] Example 3
[0057] Based on Example 2, in this example, the four magnet supports 6 are respectively in the form of bent plate-like structures.
[0058] The design is simple, with four magnet brackets 6 having a reasonable shape that facilitates assembly and saves space.
[0059] Example 4
[0060] Based on any one of Embodiments 2 to 3, in this embodiment, the first shift fork 1, the second shift fork 2, and the third shift fork 3 each include a shift fork body 8 and a shift fork bracket 9, and the fourth shift fork 4 includes the shift fork bracket 9 and two shift fork bodies 8. The shift fork bodies 8 of the first shift fork 1, the second shift fork 2, and the third shift fork 3 are respectively fixedly installed on the corresponding shift fork bracket 9, and the two shift fork bodies 8 of the fourth shift fork 4 are relatively fixedly installed on the corresponding shift fork bracket 9, and each shift fork body 8 is distributed perpendicular to the corresponding shift fork bracket 9; the four wave blocks 5 and the four magnet brackets 6 are respectively fixedly installed on the four shift fork brackets 9.
[0061] The design is simple in structure. The first shift fork 1, the second shift fork 2, the third shift fork 3 and the fourth shift fork 4 are respectively composed of shift fork bracket 9 and shift fork body 8, which are easy to process and highly efficient.
[0062] Preferably, in this embodiment, the two fork bodies 8 of the above-mentioned fourth fork 4 are distributed relative to each other along the direction from one end of the fork bracket 9 to the other end.
[0063] Example 5
[0064] Based on embodiment 4, in this embodiment, the five fork bodies 8 are respectively arc-shaped, and some of them are fixedly connected to the four fork supports 9.
[0065] The shift fork body 8 has a simple structure and a reasonable shape design, making it easy to shift gears.
[0066] Example 6
[0067] Based on embodiment 5, in this embodiment, fork foot inserts 10 are fixedly installed at both ends of the five fork bodies 8.
[0068] The fork insert 10 is made of wear-resistant plastic ultrasonic welding, which reduces noise and is less expensive than the traditional plastic coating process.
[0069] Example 7
[0070] Based on any one of Embodiments 5 to 6, in this embodiment, a midpoint insert 11 is fixedly installed on the middle part of each of the five shift fork bodies 8.
[0071] The midpoint insert 11 is made of wear-resistant plastic ultrasonic welding, which reduces noise and is less expensive than the traditional plastic coating process.
[0072] Example 8
[0073] Based on any one of Embodiments 5 to 7, in this embodiment, reinforcing plates 12 are fixedly installed on the fork bodies 8 of the first fork 1, the second fork 2 and the third fork 3, and between the two fork bodies 8 of the fourth fork 4.
[0074] The design is simple, and the reinforcing plate 12 is reasonably designed. The reinforcing plate 12 can enhance the strength of the entire shift fork, extend its service life, and reduce costs.
[0075] Preferably, in this embodiment, each of the reinforcing plates 12 is an arc-shaped plate structure that matches the shape of the corresponding fork.
[0076] Example 9
[0077] Based on the above embodiments, in this embodiment, bushings 13 are respectively fitted at both ends of the four fork brackets 9.
[0078] The solution has a simple structure and reasonable design. Each shift fork bracket 9 is connected to the gearbox at both ends by bushings 13, which reduces wear and lowers costs.
[0079] Example 10
[0080] Based on Embodiment 9, in this embodiment, the eight bushings 13 are respectively connected to the two ends of the four shift fork brackets 9 via elastic pins 14.
[0081] The solution has a simple structure and reasonable design. The elastic pin 14 can prevent the bushing 13 from slipping off the end of the corresponding shift fork bracket 9, thus ensuring the stability of the bushing 13 assembly.
[0082] Preferably, in this embodiment, each bushing 13 has a cylindrical structure with open ends.
[0083] The working principle of this utility model is as follows:
[0084] During gear shifting, shift fork 1, shift fork 2, shift fork 3 and shift fork 4 utilize the waveform block 5 on them to cooperate with the waveform groove in the corresponding part of the gearbox to achieve stable movement of shift fork 1, shift fork 2, shift fork 3 and shift fork 4, thereby achieving stable gear shifting and high shifting accuracy.
[0085] Currently, shift forks are formed using a combination of precision stamping and welding, and have the following characteristics:
[0086] 1. High precision: The manufacturing process of the precision stamping shift fork adopts a high-precision machining process, which can ensure the accuracy and quality of the shift fork.
[0087] 2. High quality: High-quality materials and processes are used in the manufacturing process of precision stamping shift forks, which can ensure the quality and reliability of shift forks.
[0088] 3. High efficiency: The manufacturing process of the precision stamping shift fork adopts a high-efficiency production process, which can improve production efficiency and reduce costs.
[0089] The purpose of this invention is to provide a high-precision, high-quality, and low-cost gear shifting device, which has the following technical advantages:
[0090] 1. Each shift fork is manufactured using a precision stamping process, resulting in high accuracy and high production efficiency;
[0091] 2. The shift fork is made using laser welding technology, which results in minimal welding deformation and high welding strength, facilitating welding automation.
[0092] 3. The bushing is made of wear-resistant engineering plastic, which is low in cost, has good wear resistance, and reduces noise;
[0093] 4. Compact structure, small space.
[0094] It should be noted that the assembly of shift fork 1, shift fork 2, shift fork 3 and shift fork 4 in the gearbox, and which gears they respectively achieve, are existing technologies and will not be elaborated here.
[0095] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0096] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
[0097] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An automotive transmission hybrid shift fork assembly, characterized by: The application relates to a gear shifting device for a gearbox, which comprises a first shifting fork (1), a second shifting fork (2), a third shifting fork (3) and a fourth shifting fork (4), wherein the second shifting fork (2) and the third shifting fork (3) are oppositely arranged, the first shifting fork (1) and the fourth shifting fork (4) are oppositely arranged and located on the side away from the second shifting fork (2) and the third shifting fork (3), the first shifting fork (1), the second shifting fork (2), the third shifting fork (3) and the fourth shifting fork (4) are fixedly connected with one end of a wave-shaped block (5), and the other end of the four wave-shaped blocks (5) is provided with a corrugated structure for matching with a wave-shaped groove in the corresponding position of the gearbox.
2. The automotive transmission hybrid shift fork assembly of claim 1, wherein: The first shifting fork (1), the second shifting fork (2), the third shifting fork (3) and the fourth shifting fork (4) are fixedly connected with one end of a magnet support (6), and the other end of the four magnet supports (6) is fixedly connected with a magnet induction assembly (7) for matching with an inductor in the gearbox.
3. The automotive transmission hybrid shift fork assembly of claim 2, wherein: The four magnet supports (6) are in the shape of a bent plate.
4. The automotive transmission hybrid shift fork assembly of claim 2, wherein: The first shifting fork (1), the second shifting fork (2) and the third shifting fork (3) comprise a shifting fork body (8) and a shifting fork support (9), the fourth shifting fork (4) comprises the shifting fork support (9) and two shifting fork bodies (8), the shifting fork bodies (8) in the first shifting fork (1), the second shifting fork (2) and the third shifting fork (3) are fixedly installed on the corresponding shifting fork supports (9), the two shifting fork bodies (8) in the fourth shifting fork (4) are fixedly installed on the corresponding shifting fork supports (9), and each shifting fork body (8) is perpendicular to the corresponding shifting fork support (9); and the four wave-shaped blocks (5) and the four magnet supports (6) are fixedly installed on the four shifting fork supports (9).
5. The automotive transmission hybrid shift fork assembly of claim 4, wherein: The five shifting fork bodies (8) are in the shape of an arc, and part of each shifting fork body (8) is fixedly connected with a shifting fork support (9).
6. The automotive transmission hybrid shift fork assembly of claim 5, wherein: The two ends of each shifting fork body (8) are fixedly installed with a fork leg insert block (10).
7. The automotive transmission hybrid shift fork assembly of claim 5, wherein: The middle part of each shifting fork body (8) is fixedly installed with an intermediate point insert block (11).
8. The automotive transmission hybrid shift fork assembly of claim 5, wherein: The shifting fork bodies (8) in the first shifting fork (1), the second shifting fork (2) and the third shifting fork (3) and the two shifting fork bodies (8) in the fourth shifting fork (4) are fixedly installed with a reinforcing plate (12).
9. The automotive transmission hybrid shift fork assembly of any one of claims 1-8, characterized in that: The two ends of each shifting fork support (9) are sleeved with a bushing (13).
10. The automotive transmission hybrid shift fork assembly of claim 9, wherein: The eight bushings (13) are connected with the two ends of the four shifting fork supports (9) through elastic pins (14).