A reversing motor push rod for a working vehicle

Abstract

The utility model relates to a reversing push rod, concretely relates to a reversing gear electric push rod for operation vehicle, including L type connecting plate, the horizontal board of L type connecting plate links with the gear box shell of operation vehicle, the vertical board side portion of L type connecting plate is installed with the casing, the push rod of sliding installation has in the casing along the length direction of horizontal board, and the end of push rod penetrates the casing and vertical board and links with the shift fork of gear box, the other end of push rod department is provided with the threaded hole, the threaded hole of push rod is installed with the drive screw rod in screw thread, and drive screw rod rotation is installed in the casing, and the end of drive screw rod far away from push rod penetrates the casing and links with the drive system, compared with the reversing mode of the gear box of the pneumatic cylinder of current use, the stroke positioning and repeat positioning accuracy are high, and the problem of overtravel or not in place will not appear in the use process, and simultaneously, compared with the pneumatic cylinder, it is not easy to be affected by air temperature.

Description

Technical Field

[0001] This utility model relates to a reversing push rod, specifically to an electric push rod for a reversing mechanism in a work vehicle. Background Technology

[0002] Similar to trains, rail transit vehicles cannot freely change their direction of travel on the track; they need to use a reversing gearbox to switch directions.

[0003] Currently, the main type of work vehicle in this field uses pneumatic cylinders to control the reversing gearbox. However, this control method is greatly affected by the cylinder air pressure, and the stroke positioning and repeatability accuracy are poor. In actual use, over-positioning or under-positioning is likely to occur, which can damage the gearbox in severe cases and affect the normal operation of the work vehicle. Utility Model Content

[0004] The purpose of this invention is to solve the technical problems of poor stroke positioning and repeatability of current pneumatic cylinders, which easily lead to over-positioning or under-positioning in actual use, and to provide an electric push rod for a commutator of a work vehicle.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] An electric push rod for a commutator of a work vehicle includes an L-shaped connecting plate; the horizontal plate of the L-shaped connecting plate is connected to the gearbox housing of the work vehicle; a housing is installed on the side of the vertical plate of the L-shaped connecting plate.

[0007] A push rod is slidably installed inside the housing along the length of the horizontal plate. One end of the push rod passes through the housing and the vertical plate and is connected to the shift fork of the gearbox.

[0008] The other end of the push rod is provided with a threaded hole;

[0009] The push rod has a drive screw threaded in its threaded hole. The drive screw is rotatably mounted inside the housing, and the end of the drive screw away from the push rod passes through the housing and is connected to the drive system.

[0010] Furthermore, the drive system includes a drive motor and a transmission box;

[0011] The transmission box includes a box body with an opening on one side; a driving gear and a driven gear that mesh with each other are rotatably installed inside the box body.

[0012] The driving gear is connected to the output shaft of the drive motor, and the driven gear is connected to the drive screw.

[0013] Furthermore, the drive motor is a servo motor or a stepper motor.

[0014] Furthermore, a U-shaped connecting block is provided between the push rod and the shift fork of the gearbox;

[0015] The shift fork is fixedly installed inside the U-shaped connecting block by a screw.

[0016] Furthermore, the transmission box is provided with a stepped through hole on its exterior that coincides with the center line of the driven gear;

[0017] The transmission box has a transmission rod inside the stepped through hole. A drive disk is provided at one end of the transmission rod near the driven gear. The drive disk has multiple circumferentially distributed protrusions. A groove that matches the protrusions is opened on the end face of the driven gear.

[0018] A handwheel is provided at the end of the transmission rod away from the driven gear, and a reset component is provided between the handwheel and the stepped through hole.

[0019] Furthermore, the reset assembly includes a limiting ring and a compression spring;

[0020] The limiting ring is fixedly sleeved on the transmission rod, and the outer diameter of the limiting ring is the same as the large section diameter of the stepped through hole.

[0021] The compression spring is sleeved on the transmission rod, and both ends of the compression spring abut against the limit ring and the wall of the stepped through hole, respectively.

[0022] Furthermore, the L-shaped connecting plate has multiple reinforcing ribs between its vertical and horizontal plates.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] The electric push rod for the commutator of the work vehicle provided by this utility model connects the gearbox to the electric push rod through an L-shaped connecting plate. A drive motor, a drive screw, and a push rod with a threaded hole work together. When commutation is required, the drive motor controls the drive screw to rotate, causing the push rod to slide along the housing under the action of the drive screw, thereby pulling the gearbox's shift fork to commutate. Compared to the current method of using pneumatic cylinders to commutate the gearbox, this method offers higher stroke positioning and repeatability accuracy, and avoids over- or under-positioning issues during use. Furthermore, compared to pneumatic cylinders, it is less affected by temperature. Attached Figure Description

[0025] Figure 1 This is one of the structural schematic diagrams of an embodiment of the present utility model;

[0026] Figure 2 This is a second structural schematic diagram of an embodiment of the present utility model;

[0027] Figure 3 for Figure 1 Internal structure diagram;

[0028] Figure 4This is a schematic diagram of the handwheel, transmission rod, drive disc, and reset assembly in an embodiment of this utility model;

[0029] Figure 5 This is a schematic diagram of the driven gear in an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached drawings: 1-L-shaped connecting plate, 2-housing shell, 3-push rod, 4-threaded hole, 5-drive screw, 6-drive motor, 7-transmission box, 71-box body, 72-driven gear, 8-U-shaped connecting block, 9-stepped through hole, 10-transmission rod, 11-drive disc, 12-protrusion, 13-groove, 14-handwheel, 15-limiting ring, 16-compression spring, 17-reinforcing rib. Detailed Implementation

[0031] The technical solutions of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] like Figure 1 and Figure 2 As shown, an electric push rod for a commutator of a work vehicle includes an L-shaped connecting plate 1; the horizontal plate of the L-shaped connecting plate 1 is connected to the gearbox housing of the work vehicle; a housing 2 is installed on the side of the vertical plate of the L-shaped connecting plate 1.

[0033] A push rod 3 is slidably installed inside the housing 2 along the length of the horizontal plate. One end of the push rod 3 passes through the housing 2 and the vertical plate and is connected to the shift fork of the gearbox.

[0034] The other end of the push rod 3 has a threaded hole 4;

[0035] The threaded hole 4 of the push rod 3 is threaded with a drive screw 5. The drive screw 5 is rotatably installed in the housing 2, and the end of the drive screw 5 away from the push rod 3 passes through the housing 2 and is connected to the drive system.

[0036] In this embodiment, the total stroke of push rod 3 is 50mm, and the mid-stroke is 25mm.

[0037] like Figure 3 As shown, the drive system includes a drive motor 6 and a transmission box 7; the drive motor 6 is a servo motor or a stepper motor.

[0038] The transmission box 7 includes a box body 71 with an opening on one side; a driving gear and a driven gear 72 that mesh with each other are rotatably installed inside the box body 71, wherein the gear ratio of the driving gear and the driven gear 72 is 1:1; the driving gear is connected to the output shaft of the drive motor 6, and the driven gear 72 is connected to the drive screw 5.

[0039] like Figure 1 and Figure 2 As shown, a U-shaped connecting block 8 is provided between the push rod 3 and the shift fork of the gearbox; the shift fork is fixedly installed in the U-shaped connecting block 8 by a screw.

[0040] like Figure 3 and Figure 4 As shown, the outside of the transmission box 7 is provided with a stepped through hole 9 that coincides with the center line of the driven gear 72;

[0041] A transmission rod 10 is provided inside the stepped through hole 9 of the transmission box 7. A drive disc 11 is provided at one end of the transmission rod 10 near the driven gear 72. The drive disc 11 has multiple circumferentially distributed protrusions 12, such as... Figure 5 As shown, a groove 13 that matches the protrusion 12 is provided on the end face of the driven gear 72;

[0042] A handwheel 14 is provided at the end of the transmission rod 10 away from the driven gear 72, and a reset component is provided between the handwheel 14 and the stepped through hole 9.

[0043] like Figure 3 and Figure 4 As shown, the reset assembly includes a limiting ring 15 and a compression spring 16;

[0044] The limiting ring 15 is fixedly sleeved on the transmission rod 10, and the outer circle dimension of the limiting ring 15 is the same as the large section dimension of the stepped through hole 9.

[0045] Compression spring 16 is sleeved on transmission rod 10, and both ends of compression spring 16 abut against the walls of limit ring 15 and stepped through hole 9, respectively.

[0046] like Figure 1 and Figure 2 As shown, multiple reinforcing ribs 17 are provided between the vertical plate and the horizontal plate of the L-shaped connecting plate 1.

[0047] In this embodiment, in order to control the drive motor 6, a PLC controller, a motor driver, and an encoder can be further provided; the specific connection method is as follows: the encoder is installed on the output shaft of the drive motor 6 and is electrically connected to the PLC controller; the PLC controller is electrically connected to the motor driver, and the motor driver is electrically connected to the drive motor 6; the motor driver and the drive motor 6 are powered by the control power supply and the power supply, respectively.

[0048] In actual use, the target stroke is input through the PLC controller. The PLC controller converts the stroke into the target rotation angle of the drive motor 6 based on the lead of the drive screw 5 and sends it to the motor driver. The motor driver then drives the motor 6 to rotate. At the same time, the encoder detects the actual rotation angle of the drive motor 6 in real time and feeds it back to the PLC controller. The PLC controller then fine-tunes the target rotation angle based on the difference between the actual rotation angle and the target rotation angle, so that the push rod 3 reaches the target stroke.

[0049] In other embodiments of this utility model, the difference lies in:

[0050] The transmission box 7 has a stepped through hole 9 on its side, which is perpendicular to the center line of the driven gear 72. A transmission rod 10 is provided in the stepped through hole 9 of the transmission box 7. A driving bevel gear is provided at the end of the transmission rod 10 near the driven gear 72. A driven bevel gear that can mesh with the driving bevel gear is provided on the end face of the driven gear 72. A handwheel 14 is provided at the end of the transmission rod 10 away from the driving bevel gear. A limiting ring 15 is fitted on the transmission rod 10. The outer diameter of the limiting ring 15 is the same as the large section diameter of the stepped through hole 9. A compression spring 16 is fitted on the transmission rod 10. The two ends of the compression spring 16 abut against the limiting ring 15 and the hole wall of the stepped through hole 9, respectively.

[0051] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An electric push rod for a commutator in a work vehicle, characterized in that: Includes an L-shaped connecting plate (1); the horizontal plate of the L-shaped connecting plate (1) is connected to the gearbox housing of the work vehicle; a housing (2) is installed on the side of the vertical plate of the L-shaped connecting plate (1); A push rod (3) is slidably installed inside the housing (2) along the length of the horizontal plate. One end of the push rod (3) passes through the housing (2) and the vertical plate and is connected to the gearbox fork. The other end of the push rod (3) is provided with a threaded hole (4); The threaded hole (4) of the push rod (3) is threaded with a drive screw (5). The drive screw (5) is rotatably installed in the housing (2), and the end of the drive screw (5) away from the push rod (3) passes through the housing (2) and is connected to the drive system.

2. The electric push rod for the commutator of the work vehicle according to claim 1, characterized in that: The drive system includes a drive motor (6) and a transmission box (7); The transmission box (7) includes a box body (71) with an opening on one side; a driving gear and a driven gear (72) that mesh with each other are rotatably installed inside the box body (71); The driving gear is connected to the output shaft of the drive motor (6), and the driven gear (72) is connected to the drive screw (5).

3. The electric push rod for the commutator of the work vehicle according to claim 2, characterized in that: The drive motor (6) is a servo motor or a stepper motor.

4. The electric push rod for the commutator of the work vehicle according to claim 1, characterized in that: A U-shaped connecting block (8) is provided between the push rod (3) and the shift fork of the gearbox; The shift fork is fixedly installed in the U-shaped connecting block (8) by a screw.

5. The electric push rod for the commutator of the work vehicle according to claim 2, characterized in that: The transmission box (7) is provided with a stepped through hole (9) on the outside that coincides with the center line of the driven gear (72); The transmission box (7) has a transmission rod (10) inside the stepped through hole (9). The transmission rod (10) has a drive disk (11) at one end near the driven gear (72). The drive disk (11) has multiple circumferentially distributed protrusions (12). The end face of the driven gear (72) has a groove (13) that matches the protrusions (12). A handwheel (14) is provided at the end of the transmission rod (10) away from the driven gear (72), and a reset assembly is provided between the handwheel (14) and the stepped through hole (9).

6. The electric push rod for the commutator of the work vehicle according to claim 5, characterized in that: The reset assembly includes a limiting ring (15) and a compression spring (16); The limiting ring (15) is fixedly sleeved on the transmission rod (10), and the outer circle dimension of the limiting ring (15) is the same as the large section dimension of the stepped through hole (9); The compression spring (16) is sleeved on the transmission rod (10), and the two ends of the compression spring (16) abut against the wall of the limiting ring (15) and the stepped through hole (9), respectively.

7. The electric push rod for the commutator of the work vehicle according to claim 1, characterized in that: The L-shaped connecting plate (1) has multiple reinforcing ribs (17) between its vertical plate and horizontal plate.

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