Double-drum brake

Abstract

The utility model relates to the technical field of brake devices, and provides a double-drum brake, which comprises an outer brake shoe assembly, an inner brake shoe assembly and an inner brake shoe assembly, the inner brake shoe assembly is sleeved on the inner side of the brake disc; the middle parts of the two reversing rods are rotationally arranged on the mounting seat, the reversing rods are provided with transmission parts and connecting parts, the connecting parts are in one-to-one correspondence with the free ends of the reversing rods, and the connecting parts are used for driving the free ends of the outer brake pads to move; and the cam shaft is rotationally arranged on the mounting base and located between the two reversing rods, the cam shaft is provided with a driving part of a cam structure, the transmission part abuts against the driving part, and the free end of the inner brake pad abuts against the driving part. According to the technical scheme, the problems that a single-side drum type brake structure is relatively small in contact area and relatively weak in braking capacity are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of braking devices, in particular to a double-drum brake. Background Art

[0002] A brake is used to brake a power transmission structure or a transportation device such as an automobile. Generally, the brake is installed on the transportation device to provide a braking force to the rotating part of the transportation device through friction, etc. The brake generally includes a disc brake and a drum brake.

[0003] In the existing drum brake, a movable brake pad is generally arranged inside the brake disc, and the friction force is provided by the brake pad approaching the brake disc. However, the friction force is related to the contact area. The contact area of the drum brake structure on one side inside the brake disc is relatively small, the braking ability is relatively weak, and the braking life is also relatively short. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a double-drum brake aiming at the above-mentioned technical deficiencies, which solves the problems of relatively small contact area and relatively weak braking ability of the single-sided drum brake structure.

[0005] The technical solution adopted by the utility model is: to provide a double-drum brake for braking a brake disc, including:

[0006] A fixed seat;

[0007] An outer brake shoe assembly sleeved outside the brake disc. The outer brake shoe assembly includes two semi-circular outer brake pads arranged oppositely. One end of the outer brake pad is rotatably arranged on the fixed seat, and the free ends of the two outer brake pads move relatively close to each other for inwardly clamping the brake disc;

[0008] An inner brake shoe assembly sleeved inside the brake disc. The inner brake shoe assembly includes two semi-circular inner brake pads arranged oppositely. One end of the inner brake pad is rotatably arranged on the fixed seat, and the free ends of the two inner brake pads move relatively away from each other for outwardly pressing against the brake disc;

[0009] An installation seat fixedly arranged relative to the fixed seat and located beside the brake disc;

[0010] There are two reversing rods. The middle of the reversing rod is rotatably arranged on the installation seat. The reversing rod has a transmission part and a connecting part. The connecting parts correspond to the free ends of the reversing rod one by one, and the connecting part is used to drive the free end of the outer brake pad to move;

[0011] The camshaft is rotatably arranged on the mounting seat and is located between the two reversing rods. The camshaft has a driving part with a cam structure. The transmission part abuts against the driving part, and the free end of the inner brake pad abuts against the driving part. The driving part is used to drive the two transmission parts away from each other, and at the same time is used to drive the free ends of the two inner brake pads to move relatively away from each other. After the two transmission parts move away from each other, the free ends of the two outer brake pads approach each other.

[0012] To further optimize this technical solution, the connecting part includes a socket and a plug post. The plug post is located at one end of the socket. The free end of the outer brake pad has a socket groove, and the socket is inserted into the socket groove. The plug post is inserted and connected to the outer brake pad.

[0013] To further optimize this technical solution, the transmission part has a first runner rotatably arranged, and the first runner rolls and abuts against the driving part.

[0014] To further optimize this technical solution, the free end of the inner brake pad has a second runner rotatably arranged, and the second runner rolls and abuts against the driving part.

[0015] To further optimize this technical solution, the cross-section of the driving part is "S"-shaped, with two outer convex surfaces and two inner concave surfaces along the ring. The inner concave surface and the outer convex surface are connected in sequence along the ring. The first runner and the second runner roll and abut against the outer convex surface and the inner concave surface.

[0016] To further optimize this technical solution, it further includes:

[0017] An adjusting arm is swingably arranged, and one end is arranged on the camshaft for driving the camshaft to rotate;

[0018] A driving mechanism for driving the adjusting arm to swing.

[0019] The beneficial effects of the present utility model are as follows:

[0020] 1. By respectively arranging an inner brake shoe assembly and an outer brake shoe assembly on the inner and outer sides, braking ability is generated by clamping the brake disc from both the inner and outer sides at the same time, integrating two drum brakes into one brake. Under the same specifications, the braking force of the double-drum brake is much greater than that of a single drum brake.

[0021] 2. By using the camshaft to simultaneously control the movement of the inner brake shoe assembly and the outer brake shoe assembly to generate braking ability, the driving structure is simpler and more stable. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the left front view of the present utility model;

[0023] Figure 2 Schematic diagram of the rear view structure of the present utility model;

[0024] Figure 3 Schematic diagram of the top view structure of the present utility model;

[0025] Figure 4 is Figure 3 Schematic diagram of the sectional structure at the A - A position in

[0026] Figure 5 is Figure 4 Schematic diagram of the partial enlarged structure at position A in

[0027] Figure 6 Schematic diagram of the installation structure of the reversing rod of the present utility model;

[0028] Figure 7 is Figure 6 Schematic diagram of the partial enlarged structure at position B in

[0029] Figure 8 Schematic diagram of the camshaft structure of the present utility model;

[0030] Explanation of the marks in the figure: 1. Brake disc; 2. Fixed seat; 3. Outer brake shoe assembly; 301. Outer brake pad; 3011. Insertion slot; 4. Inner brake shoe assembly; 401. Inner brake pad; 402. Second runner; 5. Mounting seat; 6. Reversing rod; 601. Transmission part; 6011. First runner; 602. Connection part; 6021. Insertion socket; 6022. Insertion post; 7. Camshaft; 701. Driving part; 7011. Outer convex surface; 7012. Inner concave surface; 8. Adjusting arm; 9. Driving mechanism; 901. Air chamber. Detailed implementation manners

[0031] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0032] To make the drawings concise, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. Additionally, to make the drawings concise and easy to understand, in some figures, for components with the same structure or function, only one of them is schematically shown, or only one of them is marked. In this article, "one" not only means "only this one", but also can mean "more than one" situation, and "several" includes "two" and "more than two".

[0033] In this text, it should be noted that unless otherwise clearly stipulated and defined, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0035] As Figures 1-8 shown, the double-drum brake includes: a fixed seat 2; an outer brake shoe assembly 3 sleeved outside the brake disc 1. The outer brake shoe assembly 3 includes two relatively arranged semi-circular outer brake pads 301. One end of the outer brake pad 301 is rotatably arranged on the fixed seat 2, and the free ends of the two outer brake pads 301 move relatively close to each other for inwardly clamping the brake disc 1; an inner brake shoe assembly 4 sleeved inside the brake disc 1. The inner brake shoe assembly 4 includes two relatively arranged semi-circular inner brake pads 401. One end of the inner brake pad 401 is rotatably arranged on the fixed seat 2, and the free ends of the two inner brake pads 401 move relatively away from each other for outwardly tightening the brake disc 1; a mounting seat 5 fixedly arranged relative to the fixed seat 2 and located beside the brake disc 1; two reversing rods 6. The middle of the reversing rod 6 is rotatably arranged on the mounting seat 5. The reversing rod 6 has a transmission part 601 and a connecting part 602. The connecting part 602 corresponds to the free end of the reversing rod 6 one by one, and the connecting part 602 is used to drive the free end of the outer brake pad 301 to move; a camshaft 7 rotatably arranged on the mounting seat 5 and located between the two reversing rods 6. The camshaft 7 has a driving part 701 with a cam structure. The transmission part 601 abuts against the driving part 701, and the free end of the inner brake pad 401 abuts against the driving part 701. The driving part 701 is used to drive the two transmission parts 601 away from each other, and at the same time is used to drive the free ends of the two inner brake pads 401 to move relatively away from each other. After the two transmission parts 601 move away from each other, the free ends of the two outer brake pads 301 move closer to each other.

[0036] During use, the fixed seat 2 can be installed at positions such as the chassis in the transportation equipment and is fixedly arranged. The vertical cross-section of the fixed seat 2 can be a horizontally placed "U" shape. The lower side of the semi-circular outer brake pad 301 is rotatably connected to the lower part of the fixed seat 2, and the lower side of the inner brake pad 401 is rotatably connected to the upper part of the fixed seat 2. In the outer brake shoe assembly 3, the two outer brake pads 301 are arranged oppositely, and can be arranged symmetrically left and right. When the free ends of the upper parts of the outer brake pads 301 approach each other, the outer brake pads 301 tightly hold the outer ring surface of the brake disc 1 from the outside; in the inner brake shoe assembly 4, the two inner brake pads 401 are arranged oppositely, and can be arranged symmetrically left and right. When the free ends of the upper parts of the inner brake pads 401 move away from each other, the outer sides of the inner brake pads 401 abut against the inner side wall of the brake disc 1 and tightly support the brake disc from the inside out.

[0037] The mounting seat 5 is located above the fixed seat 2 and can be fixedly arranged on the transportation equipment. The two reversing rods 6 can be symmetrically arranged left and right on the mounting seat 5. The driving part 701 of the camshaft 7 is a cam structure, and the cam structure can form an outward thrust to push the free ends of the inner brake pads 401 away from each other, so that the inner brake pads 401 approach and abut against the inside of the brake disc 1; the transmission part 601 and the connecting part 602 are located on both sides of the reversing rod 6. The driving part 701 pushes the transmission parts 601 of the two reversing rods 6 away from each other, and the reversing rods 6 rotate around the middle rotating shaft position, then the two connecting parts 602 approach each other, so that the outer brake pads 301 tightly hold the brake disc 1 from the outside and generate braking force.

[0038] Furthermore, the connecting part 602 includes a socket 6021 and a plug post 6022. The plug post 6022 is located at one end of the socket 6021. The free end of the outer brake pad 301 has a socket groove 3011. The socket 6021 is inserted and arranged in the socket groove 3011, and the plug post 6022 is inserted and connected to the outer brake pad 301.

[0039] During use, the connecting part 602 and the free end side of the outer brake pad 301 can be inserted and connected, which is convenient for the connecting part 602 to drive the free end of the outer brake pad 301 to move when swinging.

[0040] Furthermore, the transmission part 601 has a first runner 6011 rotatably arranged, and the first runner 6011 is in rolling contact with the driving part 701. The free end of the inner brake pad 401 has a second runner 402 rotatably arranged, and the second runner 402 is in rolling contact with the driving part 701.

[0041] During use, the outer brake pad 301 is in rolling contact with the driving part 701 through the first runner 6011, and one side of the free end of the inner brake pad 401 is in rolling contact with the driving part 701 through the second runner 402, which can reduce the friction force, improve the service life and the smoothness of use.

[0042] Further, the cross-section of the driving part 701 is "S"-shaped, having two convex surfaces 7011 and two concave surfaces 7012 along the ring shape. The concave surfaces 7012 and the convex surfaces 7011 are connected in sequence along the ring shape. The first runner 6011 and the second runner 402 are in rolling contact with the convex surfaces 7011 and the concave surfaces 7012.

[0043] When in use, the vertical cross-section of the driving part 701 is roughly "S"-shaped, or two crescent shapes arranged axially symmetrically. The two convex surfaces 7011 are arranged axially symmetrically, and the two concave surfaces 7012 are arranged axially symmetrically. When the transportation equipment is running normally, the two first runners 6011 are respectively located in the two concave surfaces 7012, and the two second runners 402 are also respectively located in the two concave surfaces 7012. When the drive shaft rotates, the driving part 701 rotates, and the first runner 6011 and the second runner 402 are separated from the concave surfaces 7012. The convex surfaces 7011 push the first runner 6011 and the second runner 402 outward to achieve braking, and the braking force can be adjusted by relying on the rotation angle of the wheel shaft. After braking is completed, the wheel shaft resets, and the first runner 6011 and the second runner 402 return to the positions of the concave surfaces 7012 and get closer to each other. Both the concave surfaces 7012 and the convex surfaces 7011 can be arc surfaces.

[0044] The driving part 701 can be divided into front and rear sections along the axial direction of the camshaft 7. The first runner 6011 and the second runner 402 are distributed axially before and after along the camshaft 7, corresponding to the positions of the front and rear sections of the driving part 701 respectively for driving.

[0045] To ensure that the first runner 6011 and the second runner 402 maintain contact with the driving part 701, that is, when returning from the braking state to normal driving, the inner brake pad 401 and the outer brake pad 301 are separated from the contact with the brake disc 1. The reset ability of the inner brake pad 401 and the outer brake pad 301 can be provided by setting a torsion spring or the like. The reset realizes that the inner brake pad 401 and the outer brake pad 301 are away from the brake disc 1, so that the first runner 6011 and the second runner 402 can quickly and stably reset to the concave surfaces 7012; or it can rely on the elastic force between the brake pads and the brake disc 1 to achieve separation. Separation means getting out of contact and reducing or losing the friction state.

[0046] Further, it further includes: an adjusting arm 8, swingably arranged, with one end arranged on the camshaft 7 for driving the camshaft 7 to rotate; a driving mechanism 9 for driving the adjusting arm 8 to swing.

[0047] When in use, the rotation of the camshaft 7 can be driven by the driving mechanism 9. The driving mechanism 9 can include an air chamber 901. The air chamber 901 drives the telescopic rod to move. The telescopic rod is hinged to the end of the adjusting arm 8 away from the camshaft 7, thereby driving the adjusting arm 8 to swing, and the adjusting arm 8 drives the camshaft 7 to rotate.

[0048] In the rotational connection structure, for the sake of simple and clear illustration, rotational connectors such as bearings are hidden. The annular space at the rotational connection does not represent suspension.

[0049] It can be understood that the present utility model is described through some embodiments. Those skilled in the art know that, without departing from the spirit and scope of the present utility model, various changes or equivalent substitutions can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A double drum brake for braking a brake disc (1), characterized in that: include: Fixed seat (2); An outer brake shoe assembly (3) is sleeved on the outer side of the brake disc (1), and the outer brake shoe assembly (3) comprises two semi-annular outer brake pads (301) arranged opposite to each other, one end of the outer brake pads (301) is rotatably arranged on the fixing seat (2), and the free ends of the two outer brake pads (301) are relatively close to each other and are used to hold the brake disc (1) inwardly; An inner brake shoe assembly (4) is sleeved on the inner side of the brake disc (1), and the inner brake shoe assembly (4) comprises two semi-annular inner brake pads (401) arranged opposite to each other, one end of the inner brake pads (401) is rotatably arranged on the fixing seat (2), and the free ends of the two inner brake pads (401) move away from each other to brace the brake disc (1) outwardly; A mounting seat (5) is fixedly arranged relative to the fixing seat (2) and is located beside the brake disc (1); The reversing rod (6) has two parts, the middle part of the reversing rod (6) is rotatably arranged on the mounting seat (5), the reversing rod (6) has a transmission part (601) and a connecting part (602), the connecting part (602) corresponds to the free end of the reversing rod (6) one by one, and the connecting part (602) is used to drive the free end of the outer brake pad (301) to move; A camshaft (7) is rotatably arranged on the mounting seat (5) and is located between the two reversing rods (6). The camshaft (7) has a driving portion (701) with a cam structure. The transmission portion (601) abuts against the driving portion (701), and the free end of the inner brake pad (401) abuts against the driving portion (701). The driving portion (701) is used to drive the two transmission portions (601) to move away from each other, and is also used to drive the free ends of the two inner brake pads (401) to move away from each other. When the two transmission portions (601) move away from each other, the free ends of the two outer brake pads (301) move closer to each other.

2. The double drum brake according to claim 1, characterized in that: The connecting portion (602) comprises a socket (6021) and a plug-in column (6022), wherein the plug-in column (6022) is located at one end of the socket (6021), the free end of the outer brake pad (301) has a plug-in slot (3011), the socket (6021) is plugged into the plug-in slot (3011), and the plug-in column (6022) is plug-connected to the outer brake pad (301).

3. The double drum brake according to claim 1, characterized in that: The transmission part (601) has a first rotating wheel (6011) which is rotatably arranged, and the first rotating wheel (6011) is in rolling contact with the driving part (701).

4. The double drum brake according to claim 3, characterized in that: The free end of the inner brake pad (401) is provided with a second rotating wheel (402) which is rotatably arranged, and the second rotating wheel (402) is in rolling contact with the driving part (701).

5. The double drum brake according to claim 4, characterized in that: The driving portion (701) has an S-shaped cross section and has two outer convex surfaces (7011) and two inner concave surfaces (7012) along a ring shape. The inner concave surfaces (7012) and the outer convex surfaces (7011) are sequentially connected along a ring shape. The first rotating wheel (6011) and the second rotating wheel (402) are in rolling contact with the outer convex surfaces (7011) and the inner concave surfaces (7012).

6. The double drum brake according to claim 1, characterized in that: Also includes: An adjusting arm (8) is swingably arranged, one end of which is arranged on the camshaft (7) and is used to drive the camshaft (7) to rotate; A driving mechanism (9) drives the adjusting arm (8) to swing.

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