A manual brake device for a tractor

Abstract

This utility model relates to the field of tractor braking technology, and discloses a manual brake device for a tractor, including a parking handle and a parking cable, as well as a mounting base. A positioning plate is provided on the frame on one side of the mounting base, and a brake pin is provided on the positioning plate. A brake push plate and a parking rocker arm are respectively provided at both ends of the brake pin. A reset mechanism is provided on the brake pin and mounted on the parking rocker arm and the positioning plate. This utility model has a stable structure and a strong reset function. By mounting the brake pin on the positioning plate and connecting the brake push plate and the parking rocker arm at both ends of the brake pin, and simultaneously configuring a reset mechanism, this structural design allows the braking device to form a stable force transmission path. When the parking cable pulls the parking rocker arm, the brake pin can accurately transmit torque, driving the brake push plate to achieve effective braking. At the same time, the reset mechanism ensures that it can quickly reset after braking operation, avoiding component jamming and improving the reliability and operational efficiency of the braking device.

Description

Technical Field

[0001] This utility model relates to the field of tractor braking technology, specifically to a manual brake device for a tractor. Background Technology

[0002] In the field of agricultural machinery, tractors, as important operating equipment, rely heavily on the reliability and safety of their braking systems. Currently, most existing tractor manual braking systems employ a parking handle and parking cable design, transmitting braking force through the cable to achieve the braking function. However, in practical use, these traditional braking systems suffer from poor structural stability, and the cable's fixing method is not secure enough, making it prone to loosening during frequent use and affecting braking performance. Furthermore, the brake's reset mechanism design is flawed, resulting in an unsmooth reset process that fails to reset promptly and accurately after braking, reducing the brake's efficiency and reliability. Moreover, the connection structure between components is not compact enough, causing the brake system to occupy a large amount of space, which is detrimental to the rational layout of the tractor's interior space. Furthermore, the key components of traditional tractor manual braking systems lack structural optimization, directly impacting braking performance and ease of operation. With the increasing mechanization of agriculture, the performance requirements for tractor braking systems are becoming increasingly stringent, necessitating a structurally optimized and reliable manual braking system to meet the demands of modern agricultural operations. Utility Model Content

[0003] The purpose of this invention is to provide a manual brake device with a stable structure and a strong reset function to address the above problems.

[0004] To achieve the above objectives, this utility model discloses a manual braking device for a tractor, including a parking handle and a parking rope disposed on the parking handle, and a mounting seat mounted on the frame and used to limit the end of the parking rope. Its structural feature is that a positioning plate is disposed on the frame on one side of the mounting seat, and a brake pin is disposed on the positioning plate. Both ends of the brake pin are respectively provided with a brake push plate and a parking rocker arm connected to the end of the parking rope. A reset mechanism is disposed on the brake pin and mounted on the parking rocker arm and the positioning plate.

[0005] By adopting the above structure, a positioning plate is set on the frame and a brake pin is installed, with the brake push plate and parking rocker arm connected at both ends of the brake pin. At the same time, a reset mechanism is configured. This structural design enables the braking device to form a stable force transmission path. When the parking cable pulls the parking rocker arm, the brake pin can accurately transmit torque, driving the brake push plate to achieve effective braking. Meanwhile, the reset mechanism ensures that the device can quickly reset after braking, avoiding component jamming, improving the reliability and operating efficiency of the braking device, and effectively solving the problems of unstable structure and poor reset of traditional braking devices.

[0006] Preferably, the positioning plate includes a first plate and a second plate. The second plate is disposed on the upper edge of the first plate near the middle. The first plate and the second plate are located on the same plane and are integrally formed. By configuring the positioning plate as a first plate and a second plate structure, with the second plate located on the upper edge of the first plate near the middle, and the integrally formed structure, the overall strength and rigidity of the positioning plate are enhanced. At the same time, this layout of upper and lower plates optimizes the installation space of the brake pin, enabling the positioning plate to better support and position the brake pin, thereby improving the overall stability of the braking device structure.

[0007] Preferably, the upper end of the second plate is provided with a limiting notch that matches the diameter of the brake pin, and the first plate is provided with two spaced-apart fixing bolts. The limiting notch of the second plate, matching the diameter of the brake pin, precisely limits the brake pin, preventing axial displacement during operation and ensuring the accuracy of braking. The two spaced-apart fixing bolts on the first plate securely fix the positioning plate to the frame, further enhancing the installation stability of the positioning plate.

[0008] Preferably, the brake push plate includes a rotating plate body and a push pin vertically disposed on the rotating plate body. The rotating plate body has an arc-shaped plate structure, including a force-receiving plate body connected to the brake pin shaft and a force-transmitting plate body for mounting the push pin. The width of the force-receiving plate body is greater than the width of the force-transmitting plate body. By adopting an arc-shaped rotating plate body structure and having a force-receiving plate body wider than the force-transmitting plate body, the arc-shaped structure design can better conform to the rotation trajectory of the brake pin shaft, improving the force transmission efficiency. The wider force-receiving plate body design can increase the contact area with the brake pin shaft, making the force distribution more uniform, effectively improving the load-bearing capacity and service life of the brake push plate, and ensuring the braking performance of the braking device.

[0009] Preferably, the parking rocker arm includes a bushing fitted onto the outer end of the brake pin shaft, with the bushing located outside the positioning plate. A connecting plate is fixedly attached to the outer wall of the bushing, and the connecting plate is vertically fixed to the side wall of the bushing near its outer end. A fixing pin is provided on the bushing, passing through both the bushing and the brake pin shaft. By fitting the parking rocker arm onto the outer end of the brake pin shaft via the bushing and securing it with the fixing pin, the connecting plate mounted on the outer wall of the bushing provides a reliable structure for the pull rope connection. This design makes the connection between the parking rocker arm and the brake pin shaft more stable, and the connecting plate design also facilitates connection with the reset mechanism, enhancing the flexibility of connections between various components of the braking device.

[0010] Preferably, a hinge shaft passing through the connecting plate is provided on the end of the connecting plate away from the bushing. The hinge shaft is axially aligned with the brake pin. A U-shaped connecting fork for connecting the end of the parking cable is mounted on the hinge shaft. The two forks of the U-shaped connecting fork have mounting holes that match the hinge shaft. By setting the hinge shaft on the connecting plate and mounting the U-shaped connecting fork to connect to the end of the parking cable, with the hinge shaft and brake pin axially aligned, this structure allows for a more flexible connection between the parking cable and the parking rocker arm. During the cable pulling process, the U-shaped connecting fork can rotate around the hinge shaft, effectively avoiding stress concentration caused by angle changes in the cable and reducing the risk of cable damage. At the same time, it can also pull the connecting plate and drive the brake push plate to rotate via the brake pin.

[0011] Preferably, the reset mechanism includes a torsion spring fitted onto the bushing and located between the positioning plate and the connecting plate. One end of the torsion spring has a torsion arm fixed to the connecting plate, and the other end of the torsion spring has a torsion arm engaged at the corner connecting the first and second plates of the positioning plate. The positioning plate is provided with limiting posts on both sides of the connecting plate. By using the reset mechanism, with one end of the torsion spring fixed to the connecting plate and the other end engaged at the corner of the positioning plate, in conjunction with the limiting posts on both sides of the positioning plate, the torsion spring can provide a stable reset force for the parking rocker arm, ensuring that the rocker arm quickly resets after the brake is released. The limiting posts can limit the rotation range of the connecting plate, ensuring the swing angle of the connecting plate.

[0012] Preferably, the mounting base is an L-shaped baffle formed by integrally bending a strip plate. Reinforcing ribs are provided at the corners of the mounting base. The horizontal plate of the mounting base is bolted to the vehicle frame, and a guide tube with the same extension direction as the parking cable is provided on the vertical plate. By setting the mounting base as an L-shaped baffle and providing reinforcing ribs at the corners, the mounting base can be stably fixed to the vehicle frame, while the guide tube guides the parking cable, preventing the cable from shifting or tangling during pulling and ensuring accurate transmission of the cable force.

[0013] In summary, the beneficial effects of this utility model are as follows: This utility model has a stable structure and a strong reset function. By setting a positioning plate on the frame and installing a brake pin shaft with both ends of the brake pin shaft connected to the brake push plate and the parking rocker arm, and simultaneously configuring a reset mechanism, this structural design can enable the braking device to form a stable force transmission path. When the parking cable pulls the parking rocker arm, the brake pin shaft can accurately transmit torque, driving the brake push plate to achieve effective braking. At the same time, the reset mechanism ensures that the device can quickly reset after braking, avoiding component jamming, improving the reliability and operational efficiency of the braking device, and effectively solving the problems of unstable structure and poor reset of traditional braking devices. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a bottom view of the structure of this utility model; Figure 4 This is a schematic diagram of the structure of the parking rocker arm of this utility model; Figure 5 This is a schematic diagram of the installation structure of the reset mechanism of this utility model; Figure 6 This is a schematic diagram of the installation position of the upper limit notch on the positioning plate of this utility model; Figure 7 This is a schematic diagram of the rotating plate of this utility model; Figure 8 This is a schematic diagram of the positioning plate of this utility model.

[0015] In the diagram: 1. Parking handle; 2. Parking rope; 3. Mounting base; 4. Positioning plate; 5. Brake pin; 6. Brake push plate; 7. Parking rocker arm; 8. Reset mechanism; 9. First plate; 10. Second plate; 11. Limiting notch; 12. Fixing bolt; 13. Rotating plate; 14. Push pin; 15. Force-bearing plate; 16. Force-transmitting plate; 17. Bushing; 18. Fixing pin; 19. Hinge shaft; 20. U-shaped connecting fork; 21. Mounting hole; 22. Torsion spring; 23. Limiting post; 24. Guide tube; 25. Connecting plate. Detailed Implementation

[0016] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0017] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0018] In the description of this application, it should be noted that, unless otherwise expressly 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. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0019] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0020] like Figure 1 - Figure 3 As shown, this utility model includes a parking handle 1 and a parking rope 2 disposed on the parking handle 1, and also includes a mounting seat 3 mounted on the vehicle frame and used to limit the end of the parking rope 2. The parking handle 1 and the parking rope 2 disposed on the parking handle 1 are known structures and will not be described in detail here. The mounting seat 3 is an L-shaped baffle formed by integrally bending a strip plate and is provided with reinforcing ribs at the corners. The horizontal plate of the mounting seat 3 is fixed to the vehicle frame by bolts, and the vertical plate of the mounting seat 3 is provided with a guide tube 24 in the same direction as the extension of the parking rope 2. By setting the mounting seat 3 as an L-shaped baffle and providing reinforcing ribs at the corners, the mounting seat 3 can be stably fixed to the vehicle frame. The guide tube 24 can guide the parking rope 2, allowing the parking rope 2 to move back and forth along the axial direction of the guide tube 24, and can also prevent the rope from deviating or tangling during the pulling process, ensuring the accurate transmission direction of the rope force.

[0021] like Figure 1 - Figure 8As shown, a positioning plate 4 is provided on the frame on one side of the mounting base 3. A brake pin 5 is also provided on the positioning plate 4. The positioning plate 4 includes a first plate 9 and a second plate 10. The second plate 10 is located on the upper edge of the first plate 9 near the middle. The first plate 9 and the second plate 10 are located on the same plane and are integrally formed. By setting the positioning plate 4 as a structure of first plate 9 and second plate 10, with the second plate 10 located on the upper edge of the first plate 9 near the middle, the integral structure enhances the overall strength and rigidity of the positioning plate 4. At the same time, this layout of upper and lower plates optimizes the installation space of the brake pin 5, allowing the positioning plate 4 to better support and position the brake pin 5, thereby improving the stability of the overall structure of the braking device. During manufacturing, the upper end of the second plate 10 is provided with a limiting notch 11 that matches the diameter of the brake pin 5, and two spaced fixing bolts 12 are provided on the first plate 9. By matching the limiting notch 11 of the second plate 10 with the diameter of the brake pin 5, the brake pin 5 can be precisely limited to prevent axial displacement during operation and ensure the accuracy of braking action; while the two spaced fixing bolts 12 on the first plate 9 can firmly fix the positioning plate 4 to the frame, further enhancing the installation stability of the positioning plate 4.

[0022] like Figure 1 - Figure 8As shown, brake push plates 6 and parking rocker arms 7 connected to the ends of parking rope 2 are respectively provided at both ends of brake pin 5. In the design, brake push plate 6 includes a rotating plate body 13 and a push pin 14 vertically arranged on the rotating plate body 13. The rotating plate body 13 is an arc-shaped plate structure. The rotating plate body 13 includes a force-receiving plate body 15 connected to brake pin 5 and a force-transmitting plate body 16 for installing push pin 14. The width of the force-receiving plate body 15 is greater than the width of the force-transmitting plate body 16. In this way, by adopting an arc-shaped rotating plate body 13 structure and the width of the force-receiving plate body 15 being greater than that of the force-transmitting plate body 16, the arc-shaped structure design can better fit the rotation trajectory of brake pin 5 and improve the force transmission efficiency. The wider design of the force-receiving part can increase the contact area with brake pin 5, making the force more uniform, effectively improving the load-bearing capacity and service life of brake push plate 6, and ensuring the braking performance of the braking device. The aforementioned parking rocker arm 7 includes a bushing 17 fitted onto the outer end of the brake pin 5, with the bushing 17 located outside the positioning plate 4. A connecting plate 25 is fixedly connected to the outer wall of the bushing 17, and the connecting plate 25 is vertically fixed to the side wall of the bushing 17 near the outer end. A fixing pin 18 is also provided on the bushing 17, passing through the bushing 17 and the brake pin 5. Thus, the parking rocker arm 7 is fitted onto the outer end of the brake pin 5 via the bushing 17 and fixed by the fixing pin 18. The connecting plate 25 installed on the outer wall of the bushing 17 provides a reliable structure for the pull rope connection. This design makes the connection between the parking rocker arm 7 and the brake pin 5 more stable. The design of the connecting plate 25 also facilitates connection with the reset mechanism 8, enhancing the flexibility of connection between various components of the braking device.

[0023] like Figure 1 - Figure 6 As shown, a hinge shaft 19 is provided on the end of the connecting plate 25 away from the bushing 17, passing through the connecting plate 25. The hinge shaft 19 is axially aligned with the brake pin 5. A U-shaped connecting fork 20 for connecting the end of the parking cable 2 is mounted on the hinge shaft 19. The two forks of the U-shaped connecting fork 20 are provided with mounting holes 21 that match the hinge shaft 19. In this way, by setting the hinge shaft 19 on the connecting plate 25 and installing the U-shaped connecting fork to connect with the end of the parking cable 2, and with the hinge shaft 19 and the brake pin 5 axially aligned, this structure makes the connection between the parking cable 2 and the parking rocker arm 7 more flexible. During the pulling of the cable, the U-shaped connecting fork can rotate around the hinge shaft 19, effectively avoiding stress concentration caused by the angle change of the cable and reducing the risk of cable damage. At the same time, it can also pull the connecting plate 25 and drive the brake push plate 6 to rotate through the brake pin 5.

[0024] like Figure 1 - Figure 6As shown, a reset mechanism 8 is installed on the brake pin 5, mounted on the parking rocker arm 7 and the positioning plate 4. The reset mechanism 8 includes a torsion spring 22 fitted on the bushing 17 and located between the positioning plate 4 and the connecting plate 25. One end of the torsion spring 22 is fixed to the connecting plate 25, and the other end of the torsion spring 22 is engaged at the corner where the first plate 9 and the second plate 10 of the positioning plate 4 are connected. Two limiting posts 23 are provided on the positioning plate 4 and are located on both sides of the connecting plate 25. In this way, by using the reset mechanism 8, one end of the torsion spring 22 is fixed to the connecting plate 25, and the other end is engaged at the corner of the positioning plate 4. With the limiting posts 23 on both sides of the positioning plate 4, the torsion spring 22 can provide a stable reset force for the parking rocker arm 7, ensuring that the rocker arm resets quickly after the brake is released. The limiting posts 23 can limit the rotation range of the connecting plate 25, ensuring the swing angle of the connecting plate 25.

[0025] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A hand brake device for a tractor, comprising a parking handle (1) and a parking pull rope (2) arranged on the parking handle (1), further comprising a mounting seat (3) mounted on a frame and used for defining an end portion of the parking pull rope (2), characterized in that: A positioning plate (4) is provided on the frame on one side of the mounting base (3). A brake pin (5) is provided on the positioning plate (4). A brake push plate (6) and a parking rocker arm (7) connected to the end of the parking rope (2) are respectively provided at both ends of the brake pin (5). A reset mechanism (8) is provided on the brake pin (5) and installed on the parking rocker arm (7) and the positioning plate (4).

2. The hand brake for a tractor as defined in claim 1 wherein: The positioning plate (4) includes a first plate (9) and a second plate (10). The second plate (10) is disposed on the upper side of the first plate (9) near the middle part. The first plate (9) and the second plate (10) are located on the same plane and the first plate (9) and the second plate (10) are integrally formed.

3. The manual brake device for a tractor as described in claim 2, characterized in that: The upper end of the second plate (10) is provided with a limiting notch (11) that matches the diameter of the brake pin (5), and the first plate (9) is provided with two spaced fixing bolts (12).

4. The manual brake device for a tractor as described in claim 1, characterized in that: The brake push plate (6) includes a rotating plate body (13) and a push pin (14) vertically arranged on the rotating plate body (13). The rotating plate body (13) is an arc-shaped plate structure. The rotating plate body (13) includes a force-receiving plate body (15) connected to the brake pin shaft (5) and a force-transmitting plate body (16) for installing the push pin (14). The width of the force-receiving plate body (15) is greater than the width of the force-transmitting plate body (16).

5. The manual brake device for a tractor as described in claim 1, characterized in that: The parking rocker arm (7) includes a bushing (17) fitted on the outer end of the brake pin (5) and the bushing (17) is located on the outside of the positioning plate (4). A connecting plate (25) is fixedly connected to the outer wall of the bushing (17). The connecting plate (25) is vertically fixed to the side wall of the bushing (17) near the outer end. A fixing pin (18) is provided on the bushing (17) that passes through the bushing (17) and the brake pin (5).

6. The manual brake device for a tractor as described in claim 5, characterized in that: The connecting plate (25) is provided with a hinge shaft (19) passing through the connecting plate (25) on one end of the plate away from the bushing (17). The hinge shaft (19) is axially the same as the brake pin (5). A U-shaped connecting fork (20) for connecting the end of the parking pull rope (2) is installed on the hinge shaft (19). The two forks of the U-shaped connecting fork (20) are provided with mounting holes (21) that match the hinge shaft (19).

7. The manual brake device for a tractor as described in claim 5, characterized in that: The reset mechanism (8) includes a torsion spring (22) fitted on the bushing (17) and located between the positioning plate (4) and the connecting plate (25). One end of the torsion spring (22) has a torsion arm fixed on the connecting plate (25), and the other end of the torsion spring (22) has a torsion arm locked at the corner where the first plate (9) and the second plate (10) of the positioning plate (4) are connected. The positioning plate (4) is provided with limiting posts (23) located on both sides of the connecting plate (25).

8. The manual brake device for a tractor as described in claim 1, characterized in that: The mounting base (3) is an L-shaped baffle formed by integral bending of a strip plate. The corner of the mounting base (3) is provided with reinforcing ribs. The horizontal plate of the mounting base (3) is fixed to the vehicle frame by bolts. The vertical plate of the mounting base (3) is provided with a guide tube (24) in the same direction as the parking rope (2).

Images