Driving and driven shaft synchronization structure, brake starting mechanism and brake

Abstract

The utility model provides a driving and driven shaft synchronization structure, brake starting mechanism and brake, the driving and driven shaft synchronization structure includes mounting seat, swing arm, slide bar, first rocking bar and second rocking bar, the top of mounting seat has mounting space, the bottom of swing arm forms mounting portion, mounting portion is located in mounting space and with mounting seat rotatingly connected, and the mounting space is located in the mounting space. A first connecting part is formed at the top of the swing arm, the sliding rod is connected to the first connecting part in a sliding mode, second connecting parts are formed at the two ends of the sliding rod, one end of the first rocker is rotationally connected with one second connecting part, and one end of the second rocker is rotationally connected with the other second connecting part.

Description

Technical Field

[0001] The utility model relates to the technical field of brake equipment, in particular to a master-slave shaft synchronization structure, and a brake starting mechanism and a brake comprising the synchronization structure. Background Art

[0002] Pneumatic disc brakes are widely used due to their advantages such as fast heat dissipation, light weight, simple structure, and automatic adjustment of wear clearance. In the application of double-push-rod pneumatic disc brakes, in order to ensure the consistency of the extension displacement of the two push rods of the brake activation mechanism and avoid eccentric wear of the friction plates, a synchronous structure is usually set on the main and driven shafts that drive the two push rods to move.

[0003] At present, the master and slave shaft synchronization structure used in the brake activation mechanism of the pneumatic disc brake has a chain transmission method, specifically, a chain is installed across the master and slave shafts at the top of the caliper. However, due to the tension of the iron chain, there is a difference in the compensation displacement of the two push rods during the transmission process. The difference accumulates over a long period of time, and a large distance will appear between the two push rods, causing abnormal wear of the friction plate and reduced brake life. Another master and slave shaft synchronization method is to use a gear transmission structure. For example, the Chinese invention patent with publication number CN1948778A discloses a "floating caliper double push rod pneumatic disc brake based on rectangular torsion spring one-way clutch". In this technology, the master and slave shaft synchronization structure is three mutually meshing gears installed at the bottom of the brake activation mechanism. Although the gear transmission has the advantages of compact structure, precise transmission ratio, high mechanical efficiency, reliable operation and long service life, mature and simple production process, etc., the brake is not suitable for long-distance and long-term transmission due to the easy wear of the gears, and the installation precision is high and the assembly is difficult. Utility Model Content

[0004] Based on the above technical problems, the utility model provides a master-slave shaft synchronization structure and a brake starting mechanism and brake having the synchronization structure, which can solve the technical problems of the existing master-slave shaft synchronization structure that easily causes a short brake life, is not suitable for long-distance transmission and is difficult to assemble while meeting the requirement of consistent extension displacement of the two push rods.

[0005] To achieve the above-mentioned technical objectives, the first aspect of the utility model provides a master-slave shaft synchronization structure, including a mounting seat, a swing arm, a sliding rod, a first rocker arm and a second rocker arm, the mounting seat having an installation space at the top; a mounting portion is formed at the bottom of the swing arm, the mounting portion is located in the installation space and is rotatably connected to the mounting seat, and a first connecting portion is formed at the top of the swing arm; the sliding rod is slidably connected to the first connecting portion, and second connecting portions are formed at both ends of the sliding rod; one end of the first rocker arm is rotatably connected to one of the second connecting portions, and one end of the second rocker arm is rotatably connected to another of the second connecting portions.

[0006] Furthermore, two first connecting parts are formed on the top of the swing arm, and the sliding rod includes a first sliding rod and a second sliding rod, one end of which is respectively slidably connected to the two first connecting parts, the two second connecting parts are respectively located at one end of the first sliding rod and the second sliding rod away from the swing arm, and the other ends of the first sliding rod and the second sliding rod are respectively rotatably connected to the first rocker and the second rocker through the second connecting parts.

[0007] Furthermore, a first protrusion is formed in the middle of the bottom of the swing arm and extends outward from the bottom of the swing arm, and the first protrusion constitutes the mounting portion. A mounting hole is formed in the middle of the mounting portion for rotationally connecting with the mounting seat.

[0008] Furthermore, both ends of the top of the swing arm extend outward from the top of the swing arm to form a second protrusion, and the two second protrusions respectively constitute two first connecting parts, and a first connecting hole is formed in the middle of each of the first connecting parts for respectively connecting the first sliding rod and the second sliding rod.

[0009] Furthermore, the first sliding rod includes a circular body portion and a first cylindrical body portion which are fixedly connected, the inner cylindrical surface of the first cylindrical body portion is in sliding contact with the outer cylindrical surface of the upper portion of the first rocker arm, and the first cylindrical body portion is arranged through the first connecting hole.

[0010] Furthermore, the structure of the second sliding bar is the same as that of the first sliding bar.

[0011] Furthermore, the first rocker includes a hexagonal prism body, a waist-shaped body, and a second cylindrical body that are fixedly connected in sequence, the outside of the hexagonal prism body is connected to the inside of the driving shaft through a spline coupling, and the outer cylindrical surface of the second cylindrical body is slidably connected to the inner cylindrical surface of the first cylindrical body.

[0012] Furthermore, the structure of the second rocker is the same as that of the first rocker.

[0013] The second aspect of the present invention provides a brake starting mechanism, including a reference seat, a driving shaft, a driven shaft and the master-driven shaft synchronization structure described in the first aspect of the present invention, the driving shaft is transmission-connected to the end of the first rocker arm away from the second connecting part, the end of the second rocker arm away from the second connecting part is transmission-connected to the driven shaft, and the mounting seat is fixed on the reference seat.

[0014] A third aspect of the utility model provides a brake, which includes a brake starting mechanism as described in the second aspect of the utility model.

[0015] Compared with the prior art, the beneficial effects of the utility model mainly include:

[0016] The utility model provides a master-slave shaft synchronization structure, which can ensure the synchronous movement of the driving shaft and the driven shaft through the mutual cooperation between the first rocker, the second rocker, the sliding rod, the swing arm and the mounting seat; on this basis, the synchronization structure is applied to the brake starting mechanism of the brake. Since there is no chain transmission and gear transmission, the synchronization structure of the utility model is no longer affected by the chain tension and the easy wear of the gears, and there is no difference in the compensation displacement of the two push rods, thereby avoiding the wear of the friction plate and improving the service life of the brake. At the same time, it can also be suitable for long-distance and long-time transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 This is a structural schematic diagram of the master-slave shaft synchronization structure of the utility model (installed on the brake starting mechanism);

[0019] Figure 2 This is another structural schematic diagram of the master-slave shaft synchronization structure of the utility model (installed on the brake starting mechanism).

[0020] As shown in the figure:

[0021] 100 - master and slave shaft synchronization structure, 110 - mounting seat, 111 - bracket, 112 - base, 120 - swing arm, 121 - mounting portion, 122 - first connecting portion, 130 - slide bar, 131 - first slide bar, 132 - second slide bar, 140 - first rocker, 150 - second rocker;

[0022] 200 - brake activation mechanism, 210 - reference seat, 220 - driving shaft, 230 - driven shaft. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0024] Please also read Figure 1 and Figure 2As shown, the utility model provides a new type of master-slave shaft synchronization structure 100, which specifically includes a mounting seat 110, a swing arm 120, a slide bar 130, a first rocker 140 and a second rocker 150, wherein the mounting seat 110 is fixedly mounted on a reference seat 210 of a brake starting mechanism 200, and a mounting space is provided on the top of the mounting seat 110; a mounting portion 121 is formed at the bottom of the swing arm 120, and the mounting portion 121 is rotatably connected to the mounting space of the mounting seat 110, and a mounting space is provided on the top of the swing arm 120. There is a first connecting part 122; the sliding rod 130 is arranged through the first connecting part 122 and is slidably connected to the first connecting part 122, and the two ends of the sliding rod 130 form a second connecting part; one end of the first rocker arm 140 is transmission-connected to the active shaft 220 of the brake starting mechanism 200, and the other end of the first rocker arm 140 is rotationally connected to the second connecting part, one end of the second rocker arm 150 is transmission-connected to the driven shaft 230 of the brake starting mechanism 200, and the other end of the second rocker arm 150 is rotationally connected to the second connecting part.

[0025] When the master-slave shaft synchronization structure 100 provided by the present invention is in use, the driving shaft 220 drives the first rocking arm 140 to rotate, and the first rocking arm 140 also rotates in the second connecting portion of the slide bar 130. Since the end of the first rocking arm 140 connected to the driving shaft 220 and the end connected to the second connecting portion are not coaxial, when the end of the first rocking arm 140 connected to the driving shaft 220 rotates, the end of the first rocking arm 140 connected to the second connecting portion performs a circular motion with the center of the driving shaft 220 as the center point and the distance between the two as the radius, so that the slide bar 130 can slide in the axial direction of the first rocking arm 140 and drive the slide bar 130 to slide. The rod 130 undergoes radial sliding motion in the first connection portion, and at the same time, the swing arm 120 rotatably connected to the mounting seat 110 cooperates in the swinging motion, so that the whole set of actions can be completed smoothly; the sliding of the sliding rod 130 drives the circular motion of the second rocker arm 150 at one end connected to the second connection portion (the center and trajectory of the circular motion are the same as the principle of the first rocker arm 140), so that the end of the second rocker arm 150 connected to the second connection portion also performs rotational motion in the second connection portion, which is transmitted to the end of the second rocker arm 150 connected to the driven shaft 230, and finally drives the driven shaft 230 to rotate, thereby realizing the synchronous motion of the driving shaft 220 and the driven shaft 230.

[0026] In the utility model, chain transmission and gear transmission are not adopted, so that the synchronous structure is no longer affected by the chain tension and the easy wear of the gears, and there is no difference in the compensation displacement of the two push rods, thereby avoiding the wear of the friction plate and improving the life of the brake. At the same time, it can also be suitable for long-distance and long-time transmission; and it is not limited by the center distance size of the master and slave shafts, and can realize large-span synchronous transmission.

[0027] Specifically, the mounting seat 110 includes a bracket 111 and a base 112. The bracket 111 is arranged on both sides of the reference seat 210 to provide a suitable height for the installation of the master-slave shaft synchronization structure 100. The base 112 is fixed on the bracket 111. Two hinged plates are arranged in the middle of the base 112. The gap between the two hinged plates forms the installation space of the mounting seat 110. A hinge hole is opened in the middle of the two hinged plates.

[0028] Correspondingly, a first protrusion is formed in the middle of the bottom of the swing arm 120 and extends outward from the bottom of the swing arm 120. The first protrusion constitutes the mounting portion 121. A mounting hole is formed in the middle of the mounting portion 121. The mounting hole is connected to the two hinge holes and then connected with a pin shaft to complete the rotational connection between the swing arm 120 and the base 112.

[0029] At the same time, both ends of the top of the swing arm 120 extend outward from the top of the swing arm 120 to form a second protrusion, and the two second protrusions respectively constitute two first connecting parts 122, and a first connecting hole is formed in the middle of each first connecting part 122. Correspondingly, the slide bar 130 includes a first slide bar 131 and a second slide bar 132, and both ends of the first slide bar 131 and the second slide bar 132 are respectively connected to the first connecting hole and the master and slave shafts.

[0030] Specifically, the structure of the first slide bar 131 is the same as that of the second slide bar 132. The first slide bar 131 includes a fixedly connected annular body and a first cylindrical body, the inner cylindrical surface of the first annular body is in sliding contact with the outer cylindrical surface of the upper portion of the first rocker 140, and the first cylindrical body is disposed through the first connecting hole.

[0031] Specifically, the structure of the first rocker arm 140 is the same as that of the second rocker arm 150. The first rocker arm 140 includes a hexagonal prism body, a waist-shaped body and a second cylindrical body that are fixedly connected in sequence. The outside of the hexagonal prism body is connected to the inside of the active shaft 220 through a spline coupling, and the outer cylindrical surface of the second cylindrical body is slidably connected to the inner cylindrical surface of the first cylindrical body. Here, the hexagonal prism body is required to be not coaxial with the second cylindrical body.

[0032] In this way, the hexagonal prism body of the first rocker 140 rotates under the drive of the active shaft 220, and the active shaft 220 is allowed to move downward relative to the first rocker 140 during braking, so that the waist-shaped body performs a circular motion, driving the second cylindrical body to rotate in the inner cylindrical surface of the first cylindrical body. Since the hexagonal prism body and the second cylindrical body are not coaxial, when the hexagonal prism body rotates, the waist-shaped body drives the second cylindrical body to perform a circular motion, so that the annular body of the first slide bar 131 can be axially aligned with the first rocker 140. The first cylindrical body 220 of the second rocker arm 150 is driven by the driven shaft 230 to rotate, thereby realizing the synchronous movement of the driving shaft 220 and the driven shaft 230.

[0033] In addition, the utility model also provides a brake starting mechanism 200, including a reference seat 210, a driving shaft 220, a driven shaft 230 and the above-mentioned master-slave shaft synchronization structure 100, the driving shaft 220 is transmission-connected to the end of the first rocker arm 140 away from the second connecting part, the end of the second rocker arm 150 away from the second connecting part is transmission-connected to the driven shaft 230, the mounting seat 110 is fixedly mounted on the reference seat 210, and the specific connection method and working principle of the master-slave shaft synchronization structure 100 and the brake starting mechanism 200 are as described above.

[0034] In addition, the utility model also provides a brake, which includes a brake starting mechanism 200 as described above. The brake has the advantages of accurate transmission ratio, suitability for long-distance and long-time transmission, and ability to avoid friction plate wear, thereby increasing the life of the brake.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A master-slave shaft synchronization structure, characterized in that: include: A mounting seat, wherein a mounting space is provided on the top of the mounting seat; A swing arm, wherein a mounting portion is formed at the bottom of the swing arm, the mounting portion is located in the mounting space and is rotatably connected to the mounting seat, and a first connecting portion is formed at the top of the swing arm; A sliding rod, the sliding rod is slidably connected to the first connecting portion, and a second connecting portion is formed at both ends of the sliding rod; A first rocker, one end of which is rotatably connected to one of the second connecting parts; A second rocker, one end of which is rotatably connected to another of the second connecting parts.

2. A master-slave shaft synchronization structure according to claim 1, characterized in that: Two first connecting parts are formed on the top of the swing arm, and the sliding rod includes a first sliding rod and a second sliding rod one end of which is respectively slidably connected to the two first connecting parts, and the two second connecting parts are respectively located at one end of the first sliding rod and the second sliding rod away from the swing arm, and the other ends of the first sliding rod and the second sliding rod are respectively rotatably connected to the first rocker and the second rocker through the second connecting parts.

3. A master-slave shaft synchronization structure according to claim 2, characterized in that: A first protrusion is formed in the middle of the bottom of the swing arm and extends outward from the bottom of the swing arm. The first protrusion constitutes the mounting portion. A mounting hole for rotationally connecting with the mounting seat is formed in the middle of the mounting portion.

4. A master-slave shaft synchronization structure according to claim 3, characterized in that: Both ends of the top of the swing arm extend outward from the top of the swing arm to form a second protrusion, and the two second protrusions respectively constitute two first connecting parts, and a first connecting hole for connecting the first sliding rod and the second sliding rod respectively is formed in the middle of each first connecting part.

5. A master-slave shaft synchronization structure according to claim 4, characterized in that: The first sliding rod includes a fixedly connected annular body and a first cylindrical body, the inner cylindrical surface of the first cylindrical body is in sliding contact with the outer cylindrical surface of the upper portion of the first rocker, and the first cylindrical body is arranged through the first connecting hole.

6. A master-slave shaft synchronization structure according to claim 5, characterized in that: The structure of the second sliding bar is the same as that of the first sliding bar.

7. A master-slave shaft synchronization structure according to claim 6, characterized in that: The first rocker includes a hexagonal prism body, a waist-shaped body and a second cylindrical body which are fixedly connected in sequence. The outside of the hexagonal prism body is connected to the inside of the driving shaft through a spline coupling, and the outer cylindrical surface of the second cylindrical body is slidably connected to the inner cylindrical surface of the first cylindrical body.

8. A master-slave shaft synchronization structure according to claim 7, characterized in that: The structure of the second rocker is the same as that of the first rocker.

9. A brake activation mechanism, characterized in that: It includes a reference seat, a driving shaft, a driven shaft and a master-driven shaft synchronization structure as described in any one of claims 1 to 8, the driving shaft is transmission-connected to the end of the first rocker arm away from the second connecting part, the end of the second rocker arm away from the second connecting part is transmission-connected to the driven shaft, and the mounting seat is fixed on the reference seat.

10. A brake, characterized in that: The brake comprises a brake activation mechanism as claimed in claim 9.

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