A two-gear rack-and-pinion gear shift mechanism

Abstract

The utility model discloses a two gear rack type gear shift mechanism relates to gear shift mechanism technical field, and the utility model discloses a shell, one side surface fixedly connected with side box has of shell, one side surface fixedly connected with servo motor has of side box, servo motor output fixedly connected with rotating column, rotating column outside surface fixedly connected with gear disc, gear disc outside surface is connected with rack plate with meshing, the bottom surface fixedly connected with follow board has of rack plate, the bottom surface fixedly connected with the lamination board has of follow board, through being provided with servo motor, rotating column, gear disc, rack plate, follow board, lamination board and yoke, more fast and accurate completion gear shift operation, simple structure, and transmission efficiency is high, and the cost is lower, through servo motor drive rotating column, gear disc rotates, and then drive rack plate, follow board, lamination board and yoke movement, and the yoke is inserted into the gear shift yoke groove in gearbox.

Description

Technical Field

[0001] This utility model specifically relates to a two-speed gear rack and pinion shifting mechanism, belonging to the technical field of shifting mechanisms. Background Technology

[0002] In the new energy vehicle industry, the electric motor is the core power component of new energy vehicles. Its wide speed range, constant torque at low speed, and constant power at high speed provide more possibilities for the power output of automobiles. Against this background, two-speed mechanical reducers are gradually favored by the market because of their advantages in improving the overall vehicle performance and enhancing the vehicle's acceleration and range in the mid-to-high speed range.

[0003] However, existing technologies still have the following problems:

[0004] Currently available two-speed transmission control devices generally suffer from complex structures. For example, some shift actuators require multiple components such as a gear selector motor, a shift motor, a gear position sensor, and a position sensor. This complex structure not only significantly increases manufacturing costs but also occupies more space, which is not conducive to the overall lightweight and miniaturization design of automobiles. Furthermore, existing technologies are inconvenient for fixing the shift fork position, as the shift fork may shift due to vibration, impact, or other factors, leading to unstable shifting. Using electromagnetic blocks to magnetically limit and clean the shift fork also makes it inconvenient to inspect and maintain the electromagnetic blocks used.

[0005] To address the aforementioned problems, the inventors proposed a two-speed gear and rack shifting mechanism. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of the existing technology by providing a two-speed gear and rack shifting mechanism, which better solves the problems of complex two-speed shifting structure and inconvenient limit fork positioning.

[0007] This utility model achieves the above-mentioned objective through the following technical solution: a two-speed gear rack shifting mechanism, comprising a housing, a side box fixedly connected to one side surface of the housing, a servo motor fixedly connected to one side surface of the side box, a rotating column fixedly connected to the output end of the servo motor, a gear disk fixedly connected to the outer surface of the rotating column, a rack plate meshing with the outer surface of the gear disk, a follower plate fixedly connected to the bottom surface of the rack plate, a bonding plate fixedly connected to the bottom surface of the follower plate, a shift fork fixedly connected below the bonding plate, a support frame fixedly connected to the outer surface of the housing, an electromagnetic block movably connected to the inner surface of the support frame, a limiting mechanism provided on one side surface of the support frame, the limiting mechanism including a limiting box fixedly connected to one side surface of the support frame, a sliding plate slidably connected to the inner cavity of the limiting box, a limiting post fixedly connected through one side surface of the sliding plate, and a limiting spring provided in the inner cavity of the limiting box.

[0008] Preferably, in order to better sense the rotation angle of the rotating column, a rotating ring is slidably connected to one side surface of the housing, one end of the rotating column is movably connected to the housing and fixedly connected to the rotating ring through a sealed bearing, and an angular displacement sensor is provided on the outside of the rotating ring.

[0009] Preferably, in order to better improve the stability of the follower plate's movement, a snap-fit ​​box is fixedly connected to the inner surface of the housing, and an extension plate is fixedly connected to the outer surface of the follower plate. A slot matching the structural dimensions of the extension plate is opened on one side surface of the snap-fit ​​box.

[0010] Preferably, in order to better ensure the smooth movement of the follower plate, a fixed post is fixedly connected to the end of the protruding plate away from the follower plate, and a sliding bearing is fixedly connected to the outer surface of the fixed post, the sliding bearing being located in the inner cavity of the slot.

[0011] Preferably, in order to better define the position of the bonding plate and the follower plate assembly, steel blocks are fixedly connected to both sides of the bonding plate, and the steel blocks are magnetically movably connected to the electromagnetic block.

[0012] Preferably, in order to better install the electromagnetic block, the two sides of the electromagnetic block are fixedly connected with insertion strips, and the inner surface of the support frame is provided with an insertion groove that matches the structural size of the insertion strips.

[0013] Preferably, in order to better insert the limiting block into the inner cavity of the support frame, the top surface of the electromagnetic block is fixedly connected to the limiting block, and the inner surface of the support frame is provided with a limiting groove that matches the structural size of the limiting block.

[0014] Preferably, in order to better limit the position of the limiting block and the electromagnetic block, one end of the limiting post is slidably connected to the limiting box, and a limiting hole matching the structural size of the limiting post is provided on one side surface of the limiting block.

[0015] The beneficial effects of this utility model are:

[0016] By incorporating a servo motor, rotating column, gear disk, rack plate, follower plate, bonding plate, and shift fork, the gear shifting operation can be completed more quickly and accurately. The structure is simple, the transmission efficiency is high, and the cost is low. The servo motor drives the rotating column and gear disk to rotate, which in turn drives the rack plate, follower plate, bonding plate, and shift fork to move. The shift fork is inserted into the shift block slot in the gearbox, and the shift block is pushed to realize the engagement or disengagement of the gear set in the gearbox, thus completing the shift from neutral to first gear and from first gear to second gear.

[0017] By setting up a support frame, an electromagnetic block, and a limiting mechanism, the steel blocks on both sides of the bonding plate are magnetically connected to the electromagnetic block. By controlling the on and off of the electromagnetic block, the bonding plate and the fork position can be easily fixed or released, improving stability. The electromagnetic block is installed in the support frame through the limiting mechanism, which facilitates the maintenance of the electromagnetic block. The electromagnetic block is inserted into the support frame through an insert strip, and the limiting post is inserted into the limiting block at the top of the electromagnetic block to limit the position of the electromagnetic block. Pulling the limiting post allows the electromagnetic block to be easily removed, which is convenient for maintenance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a structural schematic diagram showing the details of the outer side of the overall shell of this utility model;

[0020] Figure 3 This is a detailed structural diagram of the rack and pinion assembly of this utility model;

[0021] Figure 4 This is a structural schematic diagram showing the details of the support frame and limiting mechanism of this utility model.

[0022] In the diagram: 1. Housing; 2. Side box; 3. Servo motor; 4. Rotating column; 5. Gear disk; 6. Rack plate; 7. Follower plate; 8. Adhesive plate; 9. Shift fork; 10. Support frame; 11. Electromagnetic block; 12. Limiting mechanism; 121. Limiting box; 122. Moving plate; 123. Limiting column; 124. Limiting spring; 13. Rotating ring; 14. Inserting box; 15. Extending plate; 16. Slot; 17. Fixed column; 18. Sliding bearing; 19. Steel block; 20. Insertion strip; 21. Limiting block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-4 As shown, a two-speed rack and pinion shifting mechanism includes a housing 1. A side box 2 is fixedly connected to one side surface of the housing 1. A servo motor 3 is fixedly connected to one side surface of the side box 2. A rotating column 4 is fixedly connected to the output end of the servo motor 3. A rotating ring 13 is slidably connected to one side surface of the housing 1. One end of the rotating column 4 is movably connected to the housing 1 and fixedly connected to the rotating ring 13 through a sealed bearing. An angular displacement sensor is provided on the outer side of the rotating ring 13. During the rotation of the rotating column 4, the rotating ring 13 will rotate with the rotating column 4. The angular displacement sensor will monitor the angular displacement of the rotating ring 13 in real time and feed the monitoring data back to the controller. A gear disk 5 is fixedly connected to the outer surface of the rotating column 4. The output end of the servo motor 3 is fixedly connected to the rotating column 4. As the servo motor 3 rotates, the rotating column 4 rotates synchronously. Since the gear disk 5 is fixedly connected to the outer surface of the rotating column 4, the gear disk 5 will also rotate with the rotating column 4.

[0025] A rack plate 6 is meshed with the outer surface of the gear disk 5. When the gear disk 5 rotates, it drives the rack plate 6 to move linearly. A follower plate 7 is fixedly connected to the bottom surface of the rack plate 6. A retaining box 14 is fixedly connected to the inner surface of the housing 1. An extension plate 15 is fixedly connected to the outer surface of the follower plate 7. A slot 16 matching the structural dimensions of the extension plate 15 is opened on one side surface of the retaining box 14. A fixing post 17 is fixedly connected to the end of the extension plate 15 away from the follower plate 7. A sliding bearing 18 is fixedly connected to the outer surface of the fixing post 17. Inside the slot 16, a bonding plate 8 is fixedly connected to the bottom surface of the follower plate 7. Steel blocks 19 are fixedly embedded on both sides of the bonding plate 8. The steel blocks 19 are magnetically movably connected to the electromagnetic block 11. A shift fork 9 is fixedly connected below the bonding plate 8. The linear movement of the rack plate 6 will drive the follower plate 7 to move together. The movement of the follower plate 7 will be transmitted to the bonding plate 8 and the shift fork 9 in sequence, causing the shift fork 9 to produce a corresponding displacement. When the electromagnetic block 11 is energized, it generates magnetism and produces a magnetic attraction force with the steel block 19, fixing the bonding plate 8 and the shift fork 9 in the required position.

[0026] A support frame 10 is fixedly connected to the outer surface of the housing 1. An electromagnetic block 11 is movably connected to the inner surface of the support frame 10. Insertion strips 20 are fixedly connected to both sides of the electromagnetic block 11. An insertion groove matching the structural dimensions of the insertion strips 20 is formed on the inner surface of the support frame 10. A limit block 21 is fixedly connected to the top surface of the electromagnetic block 11. A limit groove matching the structural dimensions of the limit block 21 is formed on the inner surface of the support frame 10. The electromagnetic block 11 is inserted into the insertion groove of the support frame 10 through the insertion strips 20. A limit mechanism 12 is provided on one side surface of the support frame 10. The limit mechanism 12 includes a limit box 121 fixedly connected to one side surface of the support frame 10. A movable plate 122 is slidably connected to the inner cavity of the limit box 121. A limiting post 123 is fixedly connected through one side surface of the limiting block 21. One end of the limiting post 123 is slidably connected through the limiting box 121. A limiting hole matching the structural size of the limiting post 123 is opened through one side surface of the limiting block 21. A pull ring is fixedly connected to one end of the limiting post 123. The movement of the limiting post 123 is pulled by the pull ring, which in turn pulls the movement of the moving plate 122. At this time, the limiting spring 124 is compressed, and the limiting spring 124 deforms and generates elastic force. The limiting post 123 leaves the limiting hole on the surface of the limiting block 21. At this time, the electromagnetic block 11 can be removed for maintenance. The limiting spring 124 is provided in the inner cavity of the limiting box 121. The two ends of the limiting spring 124 are fixedly connected to the moving plate 122 and the limiting box 121, respectively.

[0027] It should be noted that, with the help of those skilled in the art, all electrical components in this case, such as servo motor 3, angular displacement sensor, electromagnetic block 11, etc., should be connected to their compatible power supplies via wires. Furthermore, a suitable controller, such as an on-board controller or a microcontroller, should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known technologies in the field. The following mainly introduces the working principle and process, and will not describe the electrical control further.

[0028] Working principle: When in use, the housing 1 is fixedly connected to the gearbox. When the vehicle needs to perform a gear shift, the controller sends a start command to the servo motor 3 fixedly connected to the side box 2. The servo motor 3 starts to run. The output end of the servo motor 3 is fixedly connected to the rotating column 4. As the servo motor 3 rotates, the rotating column 4 rotates synchronously, and the gear disk 5 also rotates with the rotating column 4.

[0029] Furthermore, a rack plate 6 is meshed with the outer surface of the gear disk 5. According to the transmission principle of the gear and rack, when the gear disk 5 rotates, it will drive the rack plate 6 to make linear motion. The linear motion of the rack plate 6 will drive the follower plate 7 to move together. During the movement of the follower plate 7, the protruding plate 15 fixedly connected to the outer surface of the follower plate 7 moves in the slot 16. The sliding bearing 18 can reduce the friction when the protruding plate 15 moves in the slot 16, and at the same time guide the movement of the follower plate 7, ensuring the smoothness and accuracy of the movement of the follower plate 7.

[0030] Furthermore, a bonding plate 8 is fixedly connected to the bottom surface of the follower plate 7, and a shift fork 9 is fixedly connected below the bonding plate 8. Therefore, the movement of the follower plate 7 will be transmitted to the bonding plate 8 and the shift fork 9 in sequence, causing the shift fork 9 to produce a corresponding displacement. The shift fork 9 will be inserted into the shift block slot in the gearbox, and the gear set in the gearbox will be engaged or disengaged by pushing the shift block, thereby completing the switching from neutral to first gear and from first gear to second gear.

[0031] Furthermore, after the shift fork 9 completes the shifting action, the controller controls the electromagnetic block 11, which is movably connected to the inner surface of the support frame 10, to be energized. Steel blocks 19 are fixedly connected to both sides of the bonding plate 8. After the electromagnetic block 11 is energized, it generates magnetism and generates magnetic attraction with the steel blocks 19, fixing the bonding plate 8 and the shift fork 9 in the required position, thereby improving the stability of shifting.

[0032] Furthermore, when the electromagnetic block 11 needs to be repaired, the controller controls the electromagnetic block 11 to be de-energized, so that it loses its magnetism and releases the magnetic attraction with the steel block 19. The operator pulls the pull ring fixedly connected to one end of the limit post 123 to move the limit post 123. At the same time, the moving plate 122 fixedly connected to the limit post 123 slides in the inner cavity of the limit box 121. At this time, the moving plate 122 compresses the limit spring 124 provided in the inner cavity of the limit box 121, and the limit spring 124 deforms and generates elastic force.

[0033] Furthermore, as the limiting post 123 moves, the limiting post 123 leaves the limiting block 21 and passes through the limiting hole that matches the structural size of the limiting post 123, thus releasing the vertical limitation on the electromagnetic block 11. Since the two sides of the electromagnetic block 11 are fixedly connected with the insertion strip 20, the electromagnetic block 11 is inserted into the insertion slot of the support frame 10 through the insertion strip 20. At this time, the operator can easily remove the electromagnetic block 11 from the support frame 10 and inspect the removed electromagnetic block 11.

[0034] 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.

[0035] 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.

Claims

1. A two-speed gear and rack shifting mechanism, comprising a housing (1), characterized in that: A side box (2) is fixedly connected to one side surface of the housing (1). A servo motor (3) is fixedly connected to one side surface of the side box (2). A rotating column (4) is fixedly connected to the output end of the servo motor (3). A gear disk (5) is fixedly connected to the outer surface of the rotating column (4). A rack plate (6) is meshed with the outer surface of the gear disk (5). A follower plate (7) is fixedly connected to the bottom surface of the rack plate (6). A bonding plate (8) is fixedly connected to the bottom surface of the follower plate (7). A shift fork (9) is fixedly connected below the bonding plate (8). (1) A support frame (10) is fixedly connected to the outer surface. An electromagnetic block (11) is movably connected to the inner surface of the support frame (10). A limiting mechanism (12) is provided on one side surface of the support frame (10). The limiting mechanism (12) includes a limiting box (121) fixedly connected to one side surface of the support frame (10). A movable plate (122) is slidably connected to the inner cavity of the limiting box (121). A limiting post (123) is fixedly connected through one side surface of the movable plate (122). A limiting spring (124) is provided in the inner cavity of the limiting box (121).

2. The two-speed gear and rack shifting mechanism as described in claim 1, characterized in that: A rotating ring (13) is slidably connected to one side of the housing (1). One end of the rotating column (4) is movably connected to the housing (1) through a sealed bearing and fixedly connected to the rotating ring (13). An angular displacement sensor is provided on the outside of the rotating ring (13).

3. The two-speed gear and rack shifting mechanism as described in claim 1, characterized in that: The inner surface of the housing (1) is fixedly connected to a card holder (14), and the outer surface of the follower plate (7) is fixedly connected to an extension plate (15). A card slot (16) matching the structural dimensions of the extension plate (15) is opened on one side surface of the card holder (14).

4. A two-speed gear and rack shifting mechanism as described in claim 3, characterized in that: The protruding plate (15) is fixedly connected to a fixed column (17) at one end away from the follower plate (7). A sliding bearing (18) is fixedly connected to the outer surface of the fixed column (17). The sliding bearing (18) is located in the inner cavity of the slot (16).

5. A two-speed gear and rack shifting mechanism as described in claim 1, characterized in that: Steel blocks (19) are fixedly connected to both sides of the bonding plate (8), and the steel blocks (19) are magnetically connected to the electromagnetic block (11).

6. A two-speed gear and rack shifting mechanism as described in claim 1, characterized in that: The electromagnetic block (11) has an insertion strip (20) fixedly connected to both sides of its surface, and the inner surface of the support frame (10) has an insertion groove that matches the structural dimensions of the insertion strip (20).

7. A two-speed gear and rack shifting mechanism as described in claim 1, characterized in that: The top surface of the electromagnetic block (11) is fixedly connected to a limiting block (21), and the inner surface of the support frame (10) is provided with a limiting groove that matches the structural dimensions of the limiting block (21).

8. A two-speed gear and rack shifting mechanism as described in claim 7, characterized in that: One end of the limiting post (123) is slidably connected to the limiting box (121), and a limiting hole matching the structural size of the limiting post (123) is provided on one side surface of the limiting block (21).

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