Long-stroke parking brake assembly and forklift

Abstract

The long-stroke parking brake assembly comprises a support, a button push rod assembly, a handle, a connecting rod, a pull rod and a wire hanging frame, one end of the handle is rotationally connected to the support, the button push rod assembly is installed in the handle, a first pin shaft is fixedly installed at the upper end of the pull rod, and a second pin shaft is installed at the lower end of the pull rod. The lower end of the pull rod is connected with the wire hanging frame, one end of the connecting rod is rotationally connected with the handle, the button push rod assembly is in movable limiting fit with one end of the connecting rod, and the other end of the connecting rod is rotationally connected to the first pin shaft. According to the parking brake assembly, the structural form that the wire hanging frame is lifted in a direct connection mode is adopted, the force transmission efficiency is high, the problems of clamping stagnation, abnormal sound and the like of the parking brake assembly are not prone to occurring, and the problems that the parking brake assembly slips on a slope or the running-in time of a brake pad is long due to the fact that the brake stroke is not enough are well solved.

Description

Technical Field

[0001] The utility model relates to the technical field of parking brakes, in particular to a long-stroke parking brake assembly and a forklift. Background Art

[0002] An existing two-point parking brake assembly with increased stroke, such as that disclosed in Chinese patent document publication number CN220317284U, achieves lifting of the wire hanger by cooperating with a waist-shaped groove and a rotating shaft sleeve. However, when the handle selection angle remains the same, the increase in the braking stroke is insufficient. In order to increase the stroke, the waist-shaped groove usually needs to be designed to be steeper, but this makes the parking brake assembly prone to problems such as sticking and abnormal noise. Utility Model Content

[0003] The utility model aims to provide a long-stroke parking brake assembly to solve the above-mentioned technical problems.

[0004] To achieve the above-mentioned purpose, the technical solution of the utility model is: a long-stroke parking brake assembly, including a bracket, a button push rod assembly, a handle, a connecting rod, a pull rod and a wire hanging rack. One end of the handle is rotatably connected to the bracket, the button push rod assembly is installed in the handle, the upper end of the pull rod is fixedly installed with a first pin shaft, the pull rod is set in the bracket by sliding up and down through the first pin shaft, the lower end of the pull rod is connected to the wire hanging rack, one end of the connecting rod is rotatably connected to the handle, the button push rod assembly is movably limited to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the first pin shaft.

[0005] Preferably, it also includes a pawl, the middle part of the pawl is rotatably connected to the handle, one end of the pawl is rotatably connected to the button push rod assembly, and the other end of the pawl is engaged with the connecting rod in a movable limit position.

[0006] Preferably, a limiting slide is provided on the top of the connecting rod, and the other end of the pawl is movably limitedly engaged with the limiting slide of the connecting rod; the limiting slide includes an L-shaped limiting portion and an inclined slide located on one side of the L-shaped limiting portion and inclined downward.

[0007] Preferably, it also includes a retaining spring, and two vertical long slots are relatively set on the bracket. The two ends of the first pin shaft respectively pass through the outside of the two long slots and are locked with the retaining spring so that the first pin shaft slides up and down and is set at the long slots.

[0008] Preferably, the braking stroke of the parking brake assembly is not less than 16 mm.

[0009] Preferably, a limiting member and a buffer washer are respectively provided on both sides of the bracket corresponding to the connecting rod, and the buffer washer is located below the handle. The limiting member and the buffer washer are respectively used to block and limit the connecting rod.

[0010] Preferably, it further includes a second pin shaft, and the lower end of the pull rod is connected to the wire hanging rack via the second pin shaft.

[0011] Preferably, an adjusting bolt is provided through the first pin shaft, the adjusting bolt is screwed together with the upper end of the pull rod, and the adjusting bolt is used to adjust the height of the pull rod and the wire hanging rack.

[0012] Preferably, a handle cover is installed at the end of the handle away from the bracket, and the button push rod assembly includes a push rod and a button located at one end of the push rod and protruding out of the handle cover. A limiting gasket and an elastic member are installed in the handle cover, and the elastic member is sleeved at the end of the button close to the push rod, and the two ends of the elastic member are respectively abutted against the limiting gasket and the button.

[0013] The utility model also provides a forklift, comprising any of the above-mentioned long-stroke parking brake assemblies.

[0014] The utility model has the following beneficial effects:

[0015] The utility model forms a structure of a direct-connected lifting wire hanging rack through a bracket, a button push rod assembly, a handle, a connecting rod, a pull rod and a wire hanging rack, which has high force transmission efficiency, and the parking brake assembly is not prone to problems such as sticking and abnormal noise. In addition, under the same handle rotation angle, the braking stroke of this direct-connected structure is increased from the original 12.6mm to 16mm, which effectively solves the problems of insufficient braking stroke of the parking brake assembly causing slipping on the slope or long brake pad running-in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a rear view of the embodiment of the utility model in the initial position

[0017] Figure 2 yes Figure 1 Cross-sectional view at AA in the middle.

[0018] Figure 3 This is a right view of the embodiment of the utility model in the initial position

[0019] Figure 4 yes Figure 3 Cross-sectional view at the middle BB.

[0020] Figure 5 yes Figure 3 Cross-sectional view at CC.

[0021] Figure 6 It is a structural schematic diagram of an embodiment of the utility model in a parking position.

[0022] Figure 7 It is a schematic diagram of the coordination of the pawl push rod button assembly according to an embodiment of the present utility model.

[0023] The attached drawings are marked: 1. Bracket, 2. Button push rod assembly, 21. Push rod, 22. Button, 3. Retaining spring, 4. Handle, 5. Handle cover, 6. Limiting gasket, 7. Elastic member, 8. Pawl, 9. Connecting rod, 10. Pull rod, 11. Wire hanging rack, 12. First pin shaft, 13. Second pin shaft, 14. Long slot hole, 15. Limiting member, 16. Buffer washer, 17. L-shaped limiting part, 18. Inclined slide, 19. Adjusting bolt. DETAILED DESCRIPTION

[0024] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the disclosure of this invention and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of this invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0025] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] See Figure 1-7As shown, as an embodiment of the present utility model, a long-stroke parking brake assembly is provided, including a bracket 1, a button push rod assembly 2, a handle 4, a pawl 8, a connecting rod 9, a pull rod 10 and a wire hanging rack 11. One end of the handle 4 is rotatably connected to the bracket, the button push rod assembly 2 is installed in the handle 4, the upper end of the pull rod 10 is fixedly installed with a first pin 12, the pull rod 10 is set in the bracket by sliding up and down through the first pin 12, the lower end of the pull rod 10 is connected to the wire hanging rack 11, the top end of the connecting rod 9 is rotatably connected to the handle 4, the button push rod assembly 2 is movably limited to cooperate with the top end of the connecting rod 9, and the bottom end of the connecting rod 9 is rotatably connected to the first pin 12. Specifically, the middle part of the pawl 8 is rotatably connected to the handle 4, one end of the pawl 8 is rotatably connected to the button push rod assembly 2, and the other end of the pawl 8 is movably limited to cooperate with the connecting rod 9, thereby improving the stability of the self-locking limit.

[0028] When parking begins, the handle 4 is pulled up and rotated, thereby driving the connecting rod 9 to move upward, and then driving the first pin shaft 12 to slide vertically upward in the bracket 1, thereby driving the pull rod 10 and the wire hanger 11 to move vertically upward. At this time, the other end of the pawl 8 is limited by the connecting rod 9, thereby achieving self-locking to prevent the movement of various components. The long-stroke parking brake assembly of the present invention adopts a direct-connected lifting wire hanger structure. Compared with the structure of the prior art that lifts the wire hanger by matching the waist-shaped groove with the rotating shaft sleeve, the direct-connected lifting wire hanger structure of the present invention has high force transmission efficiency, and the parking brake assembly is not prone to problems such as jamming and abnormal noise. In addition, under the same handle rotation angle, the braking stroke of this direct-connected structure is increased from the original 12.6mm to 16mm, which effectively solves the problem of insufficient braking stroke of the parking brake assembly causing slipping or long brake pad running-in time.

[0029] The parking brake assembly of the present invention is applicable to vehicles with brake cables, including automobiles, forklifts, etc. Of course, in other cases, the braking stroke of the parking brake assembly can be 17 or 18 mm, as long as it is not less than 16 mm, and can be specifically selected and adjusted according to different types of vehicles.

[0030] Of course, in other cases, the pawl can be replaced with other transmission structures, or the pawl can be omitted, as long as the button push rod assembly and the top end of the connecting rod can be engaged in a movable limit position.

[0031] In this embodiment, a limiting member 15 and a buffer washer 16 are respectively provided on both sides of the corresponding connecting rod 9 on the bracket 1. The buffer washer 16 is located below the handle 4. The limiting member 15 and the buffer washer 16 are respectively used to block and limit the connecting rod 9. When the handle 4 is in the initial position, the connecting rod 9 and the buffer washer 16 are abutted and limited. When the handle 4 is in the parking position, the connecting rod 9 and the limiting member 15 are abutted and limited. The limiting member 15 is the third pin shaft.

[0032] In this embodiment, a second pin shaft 13 is further included, and the lower end of the pull rod 10 is connected to the wire hanging rack 11 through the second pin shaft 13 .

[0033] In this embodiment, a limiting slide is provided at the top of the connecting rod 9, and the bottom end of the pawl 8 is movably limited in cooperation with the limiting slide of the connecting rod 9. Specifically, the limiting slide includes an L-shaped limiting portion 17 and an inclined slide 18 located on the side of the L-shaped limiting portion 17 close to the buffer washer 16 and inclined downward. When the handle 4 is in the initial position, the bottom end of the pawl 8 is pressed against and limited in cooperation with the inclined slide 18. When the handle 4 is in the parking position, the pull rod 10 is pressed against and limited in cooperation with the L-shaped limiting portion 17.

[0034] In this embodiment, an adjusting bolt 19 is provided through the first pin shaft 12 . The adjusting bolt 19 is screwed together with the upper end of the pull rod 10 . The adjusting bolt 19 is used to adjust the height of the pull rod 10 and the wire hanging rack 11 .

[0035] In this embodiment, a retaining spring 3 is also included, and two upright long slots 14 are relatively arranged on the bracket 1. The two ends of the first pin shaft 12 respectively pass through the outside of the two long slots 14 and are locked with the retaining spring 3 so that the first pin shaft 12 slides up and down and is set at the long slots 14, thereby improving the stability of the first pin shaft 12 when sliding up and down at the long slots 14, and further improving the working stability of various components such as the connecting rod 9, the pull rod 10, and the wire hanging rack 11.

[0036] In this embodiment, a handle cover 5 is installed at the end of the handle 4 away from the bracket 1. The button push rod assembly 2 includes a push rod 21 and a button 22 located at one end of the push rod 21 and protruding out of the handle cover 5. A limiting gasket 6 and an elastic member 7 are installed in the handle cover 5. The elastic member 7 is sleeved on the end of the button 22 close to the push rod 21, and the two ends of the elastic member 7 are respectively abutted against the limiting gasket 6 and the button 22. The elastic member 7 is specifically a reset spring.

[0037] The working principle of this utility model is as follows:

[0038] When the handle 4 is in the initial position, the connecting rod 9 and the buffer washer 16 are in abutment and limit cooperation. When parking begins, the handle 4 is pulled up and rotated, thereby driving the connecting rod 9 to move upward. At the same time, the pawl 8 is in abutment and contact with the inclined slide 18 of the connecting rod 9. Under the action of force, the pawl 8 is lifted, and the bottom end of the connecting rod 9 drives the first pin shaft 12 to move vertically upward along the long slot hole 14 of the bracket 1. The connecting rod 9 continues to move, so that the pawl 8 is fully lifted until the pawl 8 completely passes through the inclined slide 18. Then the pawl 8 returns to its initial position under the action of the button 22 and the return spring, so that the pawl 8 is abutted and limited at the position of the L-shaped limit portion 17, and then the pawl 8 is abutted and limited with the connecting rod 9. At the same time, the connecting rod 9 is abutted and limited on one side of the limit member 15 to prevent the handle 4 from moving in both directions.

[0039] When the parking is released, the button 22 is pressed, and the push rod 21 moves downward, so that the pawl 8 connected to it rotates and lifts to release the abutment and limit fit on the connecting rod 9. The handle 4 is released, so that the handle 4 can move downward toward the direction close to the buffer washer 16, and block the limit fit with the buffer washer 16 at the extreme position, and the handle 4 can return to the initial position.

[0040] The present invention also provides a forklift, comprising any of the long-stroke parking brake assemblies described above. By adopting a direct-connected lifting wire hanging frame structure, the force transmission efficiency is high, and the parking brake assembly is not prone to problems such as sticking and abnormal noise. In addition, under the same handle rotation angle, the braking stroke of this direct-connected structure is increased from the original 12.6mm to 16mm, which effectively solves the problem of sliding down the slope or long brake pad running-in time due to insufficient braking stroke of the parking brake assembly.

[0041] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims shall fall within the scope of protection of the present invention.

Claims

1. A long-stroke parking brake assembly, characterized in that: It includes a bracket, a button push rod assembly, a handle, a connecting rod, a pull rod and a wire hanging rack. One end of the handle is rotatably connected to the bracket, the button push rod assembly is installed in the handle, the upper end of the pull rod is fixedly installed with a first pin shaft, the pull rod is set in the bracket by sliding up and down through the first pin shaft, the lower end of the pull rod is connected to the wire hanging rack, one end of the connecting rod is rotatably connected to the handle, the button push rod assembly is movably limited to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the first pin shaft.

2. The long-stroke parking brake assembly according to claim 1, characterized in that: It also includes a pawl, the middle part of the pawl is rotatably connected to the handle, one end of the pawl is rotatably connected to the button push rod assembly, and the other end of the pawl is engaged with the connecting rod in a movable limit position.

3. The long-stroke parking brake assembly according to claim 2, characterized in that: A limiting slide is provided on the top of the connecting rod, and the other end of the pawl is movably limitedly matched with the limiting slide of the connecting rod; the limiting slide includes an L-shaped limiting portion and an inclined slide located on one side of the L-shaped limiting portion and inclined downward.

4. The long-stroke parking brake assembly according to claim 1, characterized in that: It also includes a retaining spring, and two vertical long slots are relatively set on the bracket. The two ends of the first pin shaft respectively pass through the outside of the two long slots and are locked with the retaining spring so that the first pin shaft slides up and down and is set at the long slots.

5. The long-stroke parking brake assembly according to claim 1, characterized in that: The braking stroke of the parking brake assembly shall not be less than 16 mm.

6. The long-stroke parking brake assembly according to claim 1, characterized in that: A limiting piece and a buffer washer are respectively provided on both sides of the corresponding connecting rod on the bracket. The buffer washer is located below the handle. The limiting piece and the buffer washer are respectively used to block and limit the connecting rod.

7. The long-stroke parking brake assembly according to claim 1, characterized in that: It also includes a second pin shaft, and the lower end of the pull rod is connected to the wire hanging rack through the second pin shaft.

8. The long-stroke parking brake assembly according to claim 1, characterized in that: An adjusting bolt is provided through the first pin shaft, and the adjusting bolt is screwed together with the upper end of the pull rod, and the adjusting bolt is used to adjust the height of the pull rod and the wire hanging rack.

9. The long-stroke parking brake assembly according to claim 1, characterized in that: A handle cover is installed at the end of the handle away from the bracket. The button push rod assembly includes a push rod and a button located at one end of the push rod and protruding out of the handle cover. A limit gasket and an elastic part are installed in the handle cover. The elastic part is set at the end of the button close to the push rod, and the two ends of the elastic part are respectively abutted against the limit gasket and the button.

10. A forklift, characterized in that: A long-stroke parking brake assembly comprising any one of claims 1 to 9.

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