Transmission structure and transmission thereof

Abstract

The utility model discloses a transmission structure and a speed changer thereof, and relates to the technical field of speed changers, the transmission structure comprises a base, a moving unit, a first shifting fork and a second shifting fork, a rotating shaft is arranged on the base, one end of the first shifting fork and one end of the second shifting fork are both connected to the rotating shaft in a rotating mode, and the moving unit is arranged on the base. The first shifting fork and the second shifting fork are connected through an elastic piece, and when the first shifting fork rotates around the rotating shaft, the elastic piece can push the second shifting fork to rotate synchronously. The moving unit is movably connected to the base so as to drive the first shifting fork to rotate around the rotating shaft. The shifting fork can continuously push the sliding sleeve until the sliding sleeve is completely meshed with the gear without overtime electrification.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission design, and in particular to a transmission structure and a transmission thereof. Background Art

[0002] In a fully automatic transmission, the prior art is to directly connect the magnetic rod to the fork, generate a magnetic field by energizing, and drive the magnetic rod and the fork to move together. The fork moves and then shifts the coupling teeth, causing the coupling teeth to separate or mesh with the corresponding gears, thereby forming a "disengagement" or "engagement" of the shift mechanism, and finally completing the gear shift. However, the power-on time of this method must be short. If the power is on for an excessive period of time, the coil is prone to heat and burn out. It takes time for the gears to fully mesh. If the corresponding meshing is not performed once, it needs to be performed multiple times until meshing occurs. Therefore, it is urgent to propose a transmission structure to resolve the above contradictions. Utility Model Content

[0003] In view of the deficiencies in the prior art, the first object of the utility model is to provide a transmission structure, which can enable the shift fork to continuously push the sliding sleeve until the sliding sleeve is fully meshed with the gear without overtime power supply.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A transmission structure comprises: a base, a moving unit, a first shift fork and a second shift fork, wherein the base is provided with a rotating shaft, one end of the first shift fork and the second shift fork are both rotatably connected to the rotating shaft, the first shift fork and the second shift fork are connected by an elastic member, and when the first shift fork rotates around the rotating shaft, the elastic member can push the second shift fork to rotate synchronously; the moving unit is movably connected to the base to drive the first shift fork to rotate around the rotating shaft.

[0006] Compared with the prior art, the utility model has the following beneficial effects:

[0007] When the moving unit moves, it makes the first fork rotate around the rotating shaft, and the first fork compresses one end of the elastic member, so that the other end of the elastic member pushes the second fork to rotate around the rotating shaft, and the second fork finally pushes the sliding sleeve toward the gear; when the moving unit stops moving, the first fork is locked, and the elastic member makes the second fork continue to push the sliding sleeve, so that the sliding sleeve is pressed against the corresponding gear until they are meshed with each other. Obviously, this solution does not need to be powered on for a long time, and the fork can continue to push the sliding sleeve until the sliding sleeve is fully meshed with the gear.

[0008] Furthermore, an end of the first shift fork close to the rotating shaft has an extension portion, and the extension portion can push the second shift fork to move.

[0009] Furthermore, the elastic member comprises a torsion spring or an elastic sheet, and is sleeved on the rotating shaft, and the ends of the torsion spring or the elastic sheet are respectively abutted against or fixedly connected to the first shift fork and the second shift fork (7).

[0010] Furthermore, the first shift fork is provided with a slide groove, the moving unit comprises a slide rod, a pin shaft extending in a radial direction thereof is mounted on the slide rod, the pin shaft is inserted into the slide groove and the two can move relatively.

[0011] Furthermore, the first shift fork is provided with an opening at one end away from the rotating shaft, and further comprises a cover plate which is detachably connected to the first shift fork and used for closing the opening.

[0012] Furthermore, the moving unit comprises a sliding rod, and a limiting block is fixedly provided on the sliding rod and is located on two opposite sides of the first shift fork.

[0013] Furthermore, one end of the first shift fork away from the rotating shaft is in a "U" shape and is sleeved on the sliding rod.

[0014] The second object of the utility model is to provide a transmission, which includes any one of the transmission structures mentioned above, and also includes a sliding sleeve, wherein the sliding sleeve is connected to the second shift fork.

[0015] Since the transmission has the transmission structure, it does not need to be powered on for an extended period of time, and the shift fork can continue to push the sliding sleeve until the sliding sleeve is fully meshed with the gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the structure of the shift mechanism;

[0017] Figure 2 for Figure 1 A local enlarged view of point A;

[0018] Figure 3 It is a schematic diagram of a structure consisting of multiple shifting mechanisms.

[0019] In the above drawings:

[0020] 1. Shift mechanism; 2. First shaft; 3. Gear; 4. Sliding sleeve; 5. Rotating shaft; 6. First shift fork; 7. Second shift fork; 8. Sliding rod; 9. Sliding groove; 10. Pin shaft; 11. Extension part; 12. Elastic member; 13. Cover plate; 14. End. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments; the structures described in the various embodiments can be freely combined without any conflict in structure or principle.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] The following is a description of some embodiments of the present invention in conjunction with the accompanying drawings:

[0025] like Figures 1 to 3 As shown, the utility model proposes a transmission structure. In order to facilitate the understanding of the present technical solution, the transmission structure is described as a part of the most common gear shifting mechanism 1 of a transmission, wherein the gear shifting mechanism 1 has a first shaft 2, on which a gear 3 and a sleeve 4 which can slide axially along the first shaft 2 are sleeved, and the end of the sleeve 4 opposite to the gear 3 is provided with meshing teeth.

[0026] The transmission structure includes: a base, a moving unit, a first shift fork 6 and a second shift fork 7. The base is installed in the housing of the transmission. A rotating shaft 5 is provided on the base. In order to allow the first shift fork 6 and the second shift fork 7 to rotate around the rotating shaft 5, the lower end of the first shift fork 6 and the upper end of the second shift fork 7 are both sleeved on the rotating shaft 5, and the lower end of the first shift fork 6 and the upper end of the second shift fork 7 are both clearance-matched with the rotating shaft 5. More specifically, the lower end of the first shift fork 6 and the upper end of the second shift fork 7 are staggered along the axial direction of the rotating shaft 5.

[0027] The upper end of the first shift fork 6 is connected to the moving unit to ensure that the moving unit can drive the first shift fork 6 to rotate around the rotating shaft 5. Exemplarily, the moving unit includes a slide bar 8 that is laterally movably connected in the transmission housing, which is an electromagnetic rod. A coil is installed in the transmission, and can drive the slide bar 8 to move left or right after power is turned on. The scheme of driving the slide bar 8 to move left and right by powering on is itself a prior art and will not be repeated here. Preferably, a slide groove 9 extending roughly vertically is provided at the upper end of the first shift fork 6, and a pin shaft 10 extending radially thereof is installed on the slide bar 8. The pin shaft 10 is inserted into the slide groove 9 so that the first shift fork 6 and the slide bar 8 can produce a certain relative movement, ensuring that the first shift fork 6 can rotate smoothly around the rotating shaft 5.

[0028] The outer ring of the sliding sleeve 4 is provided with a groove, and the lower end of the second shift fork 7 is an annular structure with an opening, and the annular structure is stuck in the groove of the sliding sleeve 4 to achieve active connection between the second shift fork 7 and the groove.

[0029] In addition, as a preference, Figure 2 As shown, the lower end of the first fork 6 also has an extension portion 11, which extends downward and is located on the left side of the second fork 7. In this way, when the slide bar 8 moves left, it drives the first fork 6 to rotate counterclockwise around the rotating shaft 5. At this time, the right end surface of the extension portion 11 fits with the left end surface of the second fork 7, thereby pushing the sliding sleeve 4 to move right until it is disengaged from the gear 3.

[0030] An elastic member 12 is also provided between the first fork 6 and the second fork 7. On the one hand, the elastic member 12 connects the first fork 6 and the second fork 7 to ensure that when the first fork 6 rotates around the rotating shaft 5, the elastic member 12 pushes the second fork 7 to rotate synchronously; on the other hand, when the moving unit stops moving, the second fork 7 continues to push the sliding sleeve 4 to press on the corresponding gear 3.

[0031] For example, Figure 2 As shown, the elastic member 12 includes a torsion spring, which is sleeved on the rotating shaft 5, the ring of the torsion spring is located between the first fork 6 and the second fork 7, and the end 14 of the torsion spring is respectively against the bending area of ​​the first fork 6 and the right end surface of the second fork 7.

[0032] Exemplarily, the elastic member 12 includes an elastic sheet, and two ends of the elastic sheet are respectively fixed or connected to the first fork 6 and the second fork 7 by bolts.

[0033] It should be understood that one end of the torsion spring / elastic sheet may be fixed on the first fork 6 and the other end may abut against the second fork 7, or vice versa.

[0034] With such a design, when the slide bar 8 moves to the right, the slide bar 8 drives the top of the first fork 6 to move to the right. Due to the design of the slide groove 9 and the pin 10, the first fork 6 and the slide bar 8 can slide relative to each other during this process, ensuring that the first fork 6 can rotate clockwise around the rotating shaft 5. Then, the first fork 6 compresses the upper end 14 of the elastic member 12, so that the lower end 14 of the elastic member 12 pushes the second fork 7, and the second fork 7 then rotates clockwise around the rotating shaft 5, and finally the second fork 7 pushes the sliding sleeve 4 to move toward the gear 3 (i.e., move to the left). When the slide bar 8 stops moving, the first fork 6 is locked, and the elastic member 12 causes the second fork 7 to continuously push the sliding sleeve 4, so that the sliding sleeve 4 is pressed against the corresponding gear 3 until they are meshed with each other. It can be seen that this solution does not require overtime power supply, and the fork can continuously push the sliding sleeve 4 until the sliding sleeve 4 is fully meshed with the gear 3.

[0035] In some preferred solutions, after the torsion spring is assembled, a pre-tightening force exists between the first fork 6 and the second fork 7 .

[0036] In some preferred embodiments, Figure 1 As shown, the top of the first shift fork 6 is designed as two side plates, the bottoms of the two side plates are connected together, the tops of the two side plates are opened, and the whole is formed into a "U" shape; both side plates are provided with slide grooves 9, and correspondingly, the two ends of the pin 10 are respectively inserted into the two slide grooves 9. The first shift fork 6 and the slide rod 8 form a non-cantilever structure, which has a reliable connection and a simple structure.

[0037] In some preferred solutions, the main difference from the above solution is that the connection mode between the slide bar 8 and the first fork 6 is optimized. Specifically, the left opening of the top of the first fork 6 is set, and a cover plate 13 is designed. The cover plate 13 is detachably connected to the first fork 6 by fasteners such as bolts to close the above opening. During assembly, the first fork 6 and the slide bar 8 are installed, and then the cover plate 13 is locked on the first fork 6, so that the first fork 6 and the slide bar 8 can be easily disassembled.

[0038] In some preferred schemes, two limit blocks (not shown in the figure) can be fixed on the slide rod 8, and the two limit blocks are located on the left and right sides of the first fork 6 (similar to the movable connection between the second fork 7 and the sliding sleeve 4), thereby realizing another movable connection mode between the first fork 6 and the slide rod 8, and the structure is simple.

Claims

1. A transmission structure, characterized in that: include: A base, a mobile unit, a first shift fork (6) and a second shift fork (7), wherein the base is provided with a rotating shaft (5), one end of the first shift fork (6) and the second shift fork (7) are both rotatably connected to the rotating shaft (5), the first shift fork (6) and the second shift fork (7) are connected via an elastic member (12), and when the first shift fork (6) rotates around the rotating shaft (5), the elastic member (12) can push the second shift fork (7) to rotate synchronously; the mobile unit is movably connected to the base to drive the first shift fork (6) to rotate around the rotating shaft (5).

2. A transmission structure according to claim 1, characterized in that: An end of the first shift fork (6) close to the rotating shaft (5) has an extension portion (11), and the extension portion (11) can push the second shift fork (7) to move.

3. A transmission structure according to claim 2, characterized in that: The elastic member (12) comprises a torsion spring or an elastic sheet, and is sleeved on the rotating shaft (5). The ends (14) of the torsion spring or the elastic sheet are respectively abutted against or fixedly connected to the first shift fork (6) and the second shift fork (7).

4. A transmission structure according to any one of claims 1 to 3, characterized in that: The first shift fork (6) is provided with a slide groove (9), the movable unit comprises a slide rod (8), a pin shaft (10) extending in its radial direction is mounted on the slide rod (8), the pin shaft (10) is inserted into the slide groove (9), and the two can move relative to each other.

5. A transmission structure according to claim 4, characterized in that: The first shift fork (6) is provided with an opening at one end away from the rotating shaft (5), and further comprises a cover plate (13) which is detachably connected to the first shift fork (6) and used for closing the opening.

6. A transmission structure according to any one of claims 1 to 3, characterized in that: The moving unit comprises a sliding rod (8), on which a limiting block is fixedly provided, and the limiting blocks are located on two opposite sides of the first shift fork (6).

7. A transmission structure according to claim 4, characterized in that: The end of the first shift fork (6) facing away from the rotating shaft (5) is in a "U" shape and is sleeved on the sliding rod (8).

8. A transmission, characterized in that: It comprises the transmission structure according to any one of claims 1 to 7, and further comprises a sliding sleeve (4), wherein the sliding sleeve (4) is connected to the second shift fork (7).

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