Automatic gear shifting structure of a gearbox

Abstract

The present invention discloses an automatic shifting structure for a transmission, aiming to address the complex and high-cost nature of existing automatic shifting structures. The invention comprises two piston cylinders mounted on the transmission, a slider connected to a shift rod on the transmission, a telescopic rod of the piston cylinder connected to a push block, and a slider disposed between the two push blocks. Movement of the telescopic rod causes the push block to push the slider, achieving automatic shifting of the shift rod. The automatic shifting structure for a transmission disclosed in this patent application improves upon existing manual transmissions, enabling automatic shifting and, in turn, unmanned vehicle operation. It features a simple structure and low cost.

Description

Technical Field

[0001] The present invention relates to a gearbox, and more particularly to an automatic shifting structure of a gearbox. Background Art

[0002] At present, the driving environments of special rescue vehicles are diverse, and in many cases, vehicles need to be unmanned. For example, amphibious rescue vehicles, in the process of participating in the rescue, in order to consider the safety of the drivers, often use unmanned rescue vehicles. This type of rescue vehicle can be unmanned, but the gear shifting structure of its gearbox is complex and the cost is high. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings, the present invention provides an automatic shifting structure for a transmission, which improves the existing manual transmission to achieve automatic shifting, thereby realizing unmanned driving of the vehicle, with a simple structure and low cost.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: a transmission automatic shifting structure, including two piston cylinders installed on the transmission, a slider connected to the shift rod on the transmission, the telescopic rod of the piston cylinder is connected to the push block, the slider is arranged between the two push blocks, and the movement of the telescopic rod causes the push block to push the slider to move to realize automatic shifting of the shift rod.

[0005] This application improves upon existing manual shift transmissions. A piston cylinder drives the telescopic rod, causing a push block on the telescopic rod to push a slider, enabling the shift lever connected to the slider to automatically shift gears. When the vehicle is shifted to neutral, the slider is positioned in the middle. The push blocks on the two telescopic rods engage on either side of the slider, limiting the slider's position and preventing the shift lever from accidentally shifting. After shifting to forward or reverse, the telescopic rod returns to its original position, creating a gap between the two push blocks for the slider to shift gears. To shift gears, the piston cylinder associated with the front push block activates, causing it to move backward, pushing the slider backward. Once the shift is complete, the piston cylinder drives the push block back in the opposite direction. To shift gears, the piston cylinder associated with the rear push block activates, causing it to move forward, pushing the slider forward. Once the shift is complete, the piston cylinder drives the push block back in the opposite direction. The transmission can achieve automatic shifting by simply controlling the operation of the piston cylinder. When the transmission is installed in a rescue vehicle, the piston cylinder can be controlled by buttons or a remote control, thereby achieving unmanned operation. The automatic shifting structure of the transmission disclosed in this patent application improves on the existing manual transmission to achieve automatic shifting, thereby achieving unmanned operation of the vehicle. It has a simple structure and low cost.

[0006] Preferably, a number of in-position sensors, the same number as the gear positions of the gearbox, are installed on the gearbox, and the in-position sensors detect when the gear shift lever is switched to a position.

[0007] The in-position sensor is used to detect whether the shift lever has moved into position, making gear switching more accurate and reliable.

[0008] Preferably, the piston cylinder is an electric cylinder, which is electrically connected to a controller. A shift button and a remote control signal receiver are installed on the controller. The remote control signal receiver is equipped with a remote control. The operation of the electric cylinder is controlled by pressing the shift button or the remote control, thereby realizing automatic shifting of the shift lever.

[0009] The gearbox is installed on the rescue vehicle for use. When the vehicle is driven by someone, the gear is switched by pressing the shift button. When the vehicle is undriven, the gear is switched by the remote control.

[0010] Preferably, a slide is installed on the gearbox, a slide is provided on the slide, and the slider and the end of the telescopic rod are slidably installed in the slide.

[0011] The arrangement of the sliding seat and the sliding groove facilitates the installation of the slider and the telescopic rod.

[0012] Preferably, the slide seat includes an upper seat body and a lower seat body, both of which are C-shaped structures, and are provided with long avoidance grooves, the shift rod passes through the avoidance grooves, and the upper seat body and the lower seat body are fastened together to form a slide groove.

[0013] The upper and lower bodies are connected together to form a sliding seat, which facilitates the assembly of parts. The avoidance groove provides space for the shift lever to move during gear shifting, avoiding interference.

[0014] Preferably, a bracket is installed on the gearbox, and both piston cylinders are installed on the bracket, with the two piston cylinders being arranged opposite to each other on both sides of the shift rod. The bracket facilitates the installation of the piston cylinders.

[0015] Preferably, an extension rod is connected between the telescopic rod and the push block, a positioning groove is provided on the telescopic rod, the two telescopic rods are arranged in parallel, the slider is placed between the two positioning grooves, and the push block is placed at one end of the positioning groove.

[0016] The two extension rods are set in parallel to avoid interference during movement. The positioning groove limits the slider and ensures smooth and reliable sliding of the slider.

[0017] Preferably, a top plate is installed on both sides of the slider, a positioning spring is installed between the top plate and the slider, positioning pins corresponding to the two push blocks are connected to both sides of the slider, an abutment spring is installed between the positioning pins and the slider, limited top blocks are installed on the two top plates corresponding to the two positioning pins, the ends of the positioning pins abut on the limited top blocks, and a positioning hole is provided on the extension rod near the push block; a push rod is installed on the gearbox corresponding to the push block, the end of the push rod extends between the push block and the slider, the push rod and the top plate are staggered and the slider can touch the push rod.

[0018] During a shift, if the piston cylinder that needs to be activated fails and cannot be activated, the other working piston cylinder starts to operate. The push block connected to the telescopic rod of the working piston cylinder moves toward the slider and abuts the top plate until the slider abuts the push rod. As the push block continues to move, the top plate is pressed, causing the limit push block to disengage from the positioning pin. The positioning pin is ejected outward under the action of the abutment spring and inserted into the positioning socket. The slider is now connected to the telescopic rod of the working piston cylinder, and the slider can then reciprocate with the piston cylinder to achieve the shift operation. When both piston cylinders are working properly and the shift operation is normal, the push block abuts the top plate. At this time, the slider is not pressed by the push rod, and the pressure distance of the top plate is not enough to disengage the limit push block from the positioning pin, so the shift can be normal. With this structural arrangement, even if a single piston cylinder fails, the gearbox can still achieve emergency shifting, ensuring that the rescue vehicle can continue to operate. In particular, when the rescue vehicle is engaged in a water rescue, even if one piston cylinder fails, it can continue to operate without being stuck in the water.

[0019] Preferably, guide rods are installed on both sides of the positioning spring on the top plate, guide holes are provided on the slider and the guide rods respectively, one end of the guide rod is movably inserted in the guide hole, the positioning pin and the guide rod are staggered, and the limiting top block is connected to a guide rod.

[0020] During the movement of the top plate, the guide rod plays a good guiding role, ensuring the reliable movement of the top plate.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) the automatic shifting structure of the transmission of the present patent application improves the existing manual transmission, realizes automatic shifting, and further realizes unmanned driving of the vehicle, with a simple structure and low cost; (2) two piston cylinders are provided, and when switching to neutral, the telescopic rod of the piston cylinder can limit the slider to prevent the shift lever from being triggered by accidental operation; (3) when one piston cylinder fails, the other piston cylinder can realize emergency shifting operation to ensure that the vehicle can continue to drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2is a partial top view of Example 1 of the present invention;

[0024] Figure 3 is a partial top view of Example 2 of the present invention;

[0025] Figure 4 The present invention Figure 3 A partial enlarged schematic diagram of position A in the middle;

[0026] In the figure: 1. gearbox, 2. piston cylinder, 3. shift lever, 4. slider, 5. bracket, 6. connecting seat, 7. connecting plate, 8. connecting rib, 9. telescopic rod, 10. push block, 11. slide seat, 12. slide groove, 13. upper seat body, 14. lower seat body, 15. avoidance groove, 16. extension rod, 17. positioning groove, 18. in-place sensor, 19. support, 20. top plate, 21. positioning spring, 22. positioning pin, 23. abutting spring, 24. limiting top block, 25. positioning socket, 26. flange, 27. mounting hole, 28. convex ring, 29. push rod, 30. guide rod, 31. guide hole, 32. positioning ring. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0028] Example 1: A gearbox automatic shifting structure (see attached Figure 1 , Attachment Figure 2 ), comprising two piston cylinders 2 mounted on a gearbox 1, a slider 4 connected to a shift rod 3 on the gearbox, and a bracket 5 mounted on the gearbox. Both piston cylinders are mounted on the bracket, with the two piston cylinders positioned opposite each other on opposite sides of the shift rod. The bracket includes a connecting seat 6 and connecting plates 7 connected to either side of the connecting seat. The connecting seat is securely mounted on the gearbox, with inclined connecting ribs 8 connecting the ends of the connecting plates to the connecting seat. The piston cylinders are mounted on the connecting plates. A telescopic rod 9 of the piston cylinders is connected to a push block 10, with the slider positioned between the two push blocks. Movement of the telescopic rod causes the push block to push the slider, achieving automatic shifting of the shift rod.

[0029] A slide 11 is mounted on the gearbox, which is attached to the connecting base. The slide is provided with a slide groove 12, into which the slider and the end of the telescopic rod slide. The slide comprises an upper body 13 and a lower body 14, both of which are C-shaped. Each body is provided with a long, narrow escape groove 15, through which the shift rod passes. The upper and lower bodies are securely connected to form the slide groove. An extension rod 16 connects the telescopic rod and the push block, each of which has a positioning groove 17. The two telescopic rods are arranged parallel to each other, with the slider positioned between the two positioning grooves and the push block positioned at one end of the positioning groove.

[0030] The transmission is equipped with a number of position sensors 18, equal in number to the number of gears. These sensors detect when the shift lever has shifted into position. In this embodiment, three position sensors are installed. The connector is connected to a support 19, on which the position sensors are mounted. These three position sensors correspond to forward gear, neutral gear, and reverse gear, respectively, with neutral gear being in the middle. The piston cylinder is an electric cylinder electrically connected to a controller. The controller is equipped with a shift button and a remote control receiver. The remote control receiver is equipped with a remote control. Pressing the shift button or the remote control controls the operation of the electric cylinder, thereby achieving automatic shifting of the shift lever.

[0031] This application improves upon existing manual shift transmissions. A piston cylinder drives the telescopic rod, causing a push block on the telescopic rod to push a slider, enabling the shift lever connected to the slider to automatically shift gears. When the vehicle is shifted to neutral, the slider is positioned in the middle. The push blocks on the two telescopic rods engage on either side of the slider, limiting the slider's position and preventing the shift lever from accidentally shifting. After shifting to forward or reverse, the telescopic rod returns to its original position, creating a gap between the two push blocks for the slider to shift gears. To shift gears, the piston cylinder associated with the front push block activates, causing it to move backward, pushing the slider backward. Once the shift is complete, the piston cylinder drives the push block back in the opposite direction. To shift gears, the piston cylinder associated with the rear push block activates, causing it to move forward, pushing the slider forward. Once the shift is complete, the piston cylinder drives the push block back in the opposite direction. The transmission can achieve automatic shifting by simply controlling the operation of the piston cylinder. When the transmission is installed in a rescue vehicle, the piston cylinder can be controlled by buttons or a remote control, thereby achieving unmanned operation. The automatic shifting structure of the transmission disclosed in this patent application improves on the existing manual transmission to achieve automatic shifting, thereby achieving unmanned operation of the vehicle. It has a simple structure and low cost.

[0032] Example 2: A gearbox automatic shifting structure (see attached Figure 3 , Attachment Figure 4), its structure is similar to that of Example 1, the main difference being that in this embodiment, a top plate 20 is installed on both sides of the slider, a positioning spring 21 is installed between the top plate and the slider, a positioning pin 22 corresponding to the two push blocks is connected to both sides of the slider, an abutting spring 23 is installed between the positioning pin and the slider, a limiting top block 24 is installed on the two top plates and corresponding to the two positioning pins, the end of the positioning pin abuts against the limiting top block, and a positioning socket 25 is provided on the extension rod near the push block; a flange 26 is provided at one end of the positioning pin, a mounting hole 27 is provided on the slider corresponding to the positioning pin, a convex ring 28 is provided at the open end of the mounting hole, the other end of the positioning pin passes through the convex ring and abuts against the limiting top block, and the abutting spring is placed between the bottom of the mounting hole and the flange. A push rod 29 is installed on the gearbox corresponding to the push block, the end of the push rod extends between the push block and the slider, the push rod and the top plate are staggered, and the slider can touch the push rod. Guide rods 30 are mounted on either side of the positioning spring on the top plate. Guide holes 31 are provided on the slider and corresponding to the guide rods. One end of the guide rod is movably inserted into the guide hole. The positioning pin and guide rod are staggered, and the limiter block is connected to one of the guide rods. The guide rod consists of a large-diameter section and a small-diameter section. The large-diameter section is placed in the guide hole. A positioning ring 32 is connected to the opening of the guide hole on the slider, and the end of the large-diameter section abuts the positioning ring. The rest of the structure is identical to that of Example 1.

[0033] During a shift, if the piston cylinder that needs to be activated fails and cannot be activated, the other working piston cylinder starts to operate. The push block connected to the telescopic rod of the working piston cylinder moves toward the slider and abuts the top plate until the slider abuts the push rod. As the push block continues to move, the top plate is pressed, causing the limit push block to disengage from the positioning pin. The positioning pin is ejected outward under the action of the abutment spring and inserted into the positioning socket. The slider is now connected to the telescopic rod of the working piston cylinder, and the slider can then reciprocate with the piston cylinder to achieve the shift operation. When both piston cylinders are working properly and the shift operation is normal, the push block abuts the top plate. At this time, the slider is not pressed by the push rod, and the pressure distance of the top plate is not enough to disengage the limit push block from the positioning pin, so the shift can be normal. With this structural arrangement, even if a single piston cylinder fails, the gearbox can still achieve emergency shifting, ensuring that the rescue vehicle can continue to operate. In particular, when the rescue vehicle is engaged in a water rescue, even if one piston cylinder fails, it can continue to operate without being stuck in the water.

[0034] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A gearbox automatic shifting structure, characterized in that: The cam is provided with a plurality of movable members, each of which is connected to the movable member, and the movable member is connected to the movable member by a plurality of movable members.

2. The automatic shifting structure of a transmission according to claim 1, characterized in that: The gearbox is equipped with a number of in-position sensors that match the number of gear positions. When the gear lever is switched to a specific position, it is detected by the in-position sensors.

3. The automatic shifting structure of a transmission according to claim 1, characterized in that: The piston cylinder is an electric cylinder, which is electrically connected to a controller. A shift button and a remote control signal receiver are installed on the controller. The remote control signal receiver is equipped with a remote control. By pressing the shift button or the remote control, the operation of the electric cylinder is controlled, thereby realizing automatic shifting of the shift lever.

4. The automatic shifting structure of a transmission according to claim 1, characterized in that: A slide is installed on the gearbox, a slide groove is provided on the slide, and the slider and the end of the telescopic rod are slidably installed in the slide groove.

5. The automatic shifting structure of a transmission according to claim 4, characterized in that the slide It includes an upper seat body and a lower seat body. Both the upper seat body and the lower seat body are C-shaped structures. Both the upper seat body and the lower seat body are provided with long avoidance grooves. The shift rod passes through the avoidance grooves. The upper seat body and the lower seat body are fastened to form a slide groove.

6. The automatic shifting structure of a transmission according to claim 1, characterized in that: A bracket is installed on the gearbox, and both piston cylinders are installed on the bracket. The two piston cylinders are oppositely arranged on both sides of the shift rod.

7. The automatic shifting structure of a transmission according to any one of claims 1 to 6, characterized in that: A positioning groove is provided on the telescopic rod, the two telescopic rods are arranged in parallel, the sliding block is placed between the two positioning grooves, and the pushing block is placed at one end of the positioning groove.

8. The automatic shifting structure of a transmission according to claim 7, characterized in that: Guide rods are installed on both sides of the positioning spring on the top plate, guide holes are provided on the slider and the guide rods respectively, one end of the guide rod is movably inserted in the guide hole, the positioning pin and the guide rod are staggered, and the limit top block is connected to a guide rod.

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