Large-torque hydraulic brake

Abstract

The utility model discloses a large-torque hydraulic brake, and belongs to the field of industrial brakes. The hydraulic brake comprises an outer gear shaft sleeve, an inner gear sleeve arranged on the outer gear shaft sleeve in a sleeving mode, a gland fixedly installed at one end of the inner gear sleeve, a friction plate axially moving on the outer gear shaft sleeve, a dual steel sheet axially moving in the inner gear sleeve and a driving structure fixedly installed on the inner gear sleeve. The driving structure comprises a cylinder body fixedly installed at the end, away from the gland, of the inner gear sleeve and a piston axially moving in the inner gear sleeve, and a liquid inlet is formed in the cylinder body. The driving structure further comprises a reset spring arranged on the inner gear sleeve. The reset spring is arranged outside the circumference of the inner gear sleeve and used for extruding the piston to move rightwards so that the friction plate can be separated from the steel sheet, and the friction type normally-open structure can better meet the working condition of long-term separation. The contact area of the piston and the oil cylinder body is increased by rotationally embedding the piston on the oil cylinder body, the torque is large, and the hydraulic cylinder is suitable for working conditions of high rotating speed and large torque.

Description

Technical Field

[0001] This application relates to the technical field of industrial brakes, and specifically relates to a high-torque hydraulic brake. Background Art

[0002] A brake is a device that functions to decelerate, stop, or maintain a stopped state of a moving part, and is a mechanical part that stops or decelerates a moving part in a machine.

[0003] As Figure 4 shown, a traditional hydraulic brake includes an external gear shaft sleeve 1', an internal gear sleeve 2' sleeved on the external gear shaft sleeve 1' and rotatably connected to the external gear shaft sleeve 1', a gland 3' fixedly installed at one end of the internal gear sleeve 2', a friction plate 4' axially moving on the external gear shaft sleeve 1', a mating steel plate 5' axially moving inside the internal gear sleeve 2' for contacting the friction plate 4', a cylinder block 61' fixed at one end of the internal gear sleeve 2' away from the gland 3', and a piston 62' axially moving inside the internal gear sleeve 2' for driving the mating steel plate 5' and the friction plate 4' to move closer to the pressure plate 3'. A liquid inlet 611' is provided on the cylinder block 61' for introducing liquid to make the piston 62' extend from the cylinder block 61'. When there is no oil pressure, multiple groups of friction plates and steel plates are pressed tightly under the action of a brake spring, and at this time the brake is in a braking state; when there is oil pressure, the oil pressure pushes the piston to compress the brake spring, and multiple groups of friction plates and steel plates are separated, and at this time the brake is in a released state. However, such a friction type hydraulic brake is normally closed and it is difficult to meet the working conditions that require long-term separation; at the same time, the contact area between the oil cylinder and the piston is small and the torque is small, and it is not suitable for working conditions with high speed and large torque.

[0004] Therefore, this application provides a high-torque hydraulic brake to solve the above problems. Utility Model Content

[0005] This application provides a high-torque hydraulic brake, aiming to solve the problems in the background art that the existing friction type brake is normally closed and it is difficult to meet the working conditions that require long-term separation, and the contact area between the oil cylinder and the piston is small and the torque is small, and it is not suitable for working conditions with high speed and large torque.

[0006] To achieve the above object, the present application provides the following technical solution: A large-torque hydraulic brake, including an external gear shaft sleeve, an internal gear sleeve sleeved on the external gear shaft sleeve and rotatably connected to the external gear shaft sleeve, a gland fixedly installed at one end of the internal gear sleeve, a friction plate axially moving on the external gear shaft sleeve, a mating steel plate axially moving inside the internal gear sleeve for contacting the friction plate, and a driving structure fixedly installed on the internal gear sleeve; the driving structure includes a cylinder body fixedly installed at one end of the internal gear sleeve away from the gland and a piston axially moving on the internal gear sleeve for driving the mating steel plate and the friction plate to move close to the gland, the piston is inserted into the interior of the cylinder body away from the internal gear sleeve and is slidably connected to the cylinder body, and a liquid inlet is provided on the cylinder body for introducing liquid to make the piston extend out of the cylinder body; the driving structure further includes a return spring provided on the internal gear sleeve for resetting the piston. In this way, when there is no pressure source, under the action of the return spring, the friction plate and the steel plate are separated, and the brake is in the released state; when the pressure source of the brake is supplied with oil, the piston moves to the left, pressing the multiple groups of steel plates and the friction plate to be combined, and the brake will be in the braking state, and at this time the brake is in the braking state; when it is necessary to release again, cut off the oil supply of the pressure source in the oil cylinder, and the piston moves to the right under the action of the return spring, loosening the multiple groups of steel plates and the friction plate, and the brake is released again.

[0007] Preferably, a sealing ring is provided on the piston for sealing the gap between the piston and the cylinder body.

[0008] Preferably, three sets of return springs are provided, with three in each set, and a spring hole for installing the return spring is provided at one end of the internal gear sleeve facing the piston.

[0009] Preferably, a square groove communicating with the inner circle of the internal gear sleeve is provided at the port of the spring hole, and an outer angle fixedly connected to the outer wall of the piston and contacting the return spring is slidably connected in the square groove.

[0010] Preferably, the friction plate is in a circular ring shape, and an inner tooth groove meshing with the outer tooth groove of the external gear shaft sleeve is provided on the inner side wall of the friction plate.

[0011] Preferably, the steel plate is in a circular ring shape, and an outer tooth groove meshing with the inner tooth groove of the internal gear sleeve is provided on the outer wall of the steel plate.

[0012] Preferably, corresponding round holes are provided on the internal gear sleeve, the gland and the cylinder body.

[0013] Preferably, the friction plate is sintered from a copper-based wear-resistant material.

[0014] In this application, a return spring is placed on the outer circumference of the inner gear sleeve to squeeze the piston to move to the right, separating the friction plate from the steel plate. It adopts a friction type normally open structure, which can better meet the working conditions that require long-term separation. By rotatably embedding the piston on the cylinder block, the contact area between the piston and the cylinder block is increased, realizing the function of large torque, and it is applicable to working conditions with high speed and large torque.

[0015] This form of brake adopts an integrated structure. When there is no pressure source, under the action of the return spring, the friction plate is separated from the steel plate, and the brake is in the released state. When the pressure source of the brake is supplied with oil, the piston moves to the left, pressing multiple groups of steel plates to combine with the friction plate, and the brake will be in the braking state. At this time, the brake is in the braking state. When it is necessary to release it again, cut off the oil supply of the pressure source in the oil cylinder. Under the action of the return spring, the piston moves to the right, releasing multiple groups of steel plates and friction plates, and the brake is released again.

[0016] The outer angle on the piston can axially move in the square groove of the inner gear sleeve, and the outer angle always presses the return spring, thereby enabling the inner gear sleeve and piston structure to have axial guiding and anti-rotation functions, making the braking more stable and reliable.

[0017] By installing multiple return springs at one end of the inner gear sleeve close to the piston, the reset force of the piston is enhanced, and the reset speed is fast; it solves the problem of slow reset of the hydraulic brake. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of a large-torque hydraulic brake;

[0019] Figure 2 It is Figure 1 The side view of the connection between the piston and the outer angle in

[0020] Figure 3 It is the side view of the inner gear sleeve, spring hole and square groove;

[0021] Figure 4 It is a schematic diagram of the structure of a traditional large-torque hydraulic brake.

[0022] In the figure:

[0023] 1. Outer gear shaft sleeve; 2. Inner gear sleeve; 21. Spring hole; 22. Square groove; 3. Gland; 4. Friction plate; 5. Steel plate; 6. Driving structure; 61. Cylinder block; 611. Liquid inlet; 62. Piston; 621. Sealing ring; 622. Outer angle; 63. Return spring. Detailed Implementation Modes

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0025] This embodiment provides a high-torque hydraulic brake. As Figures 1 - 3 shown, the high-torque hydraulic brake includes an external gear shaft sleeve 1, an internal gear sleeve 2 sleeved on the external gear shaft sleeve 1 and rotatably connected to the external gear shaft sleeve 1, a gland 3 fixedly installed at one end of the internal gear sleeve 2, a friction plate 4 axially moving on the external gear shaft sleeve 1, a mating steel sheet 5 axially moving inside the internal gear sleeve 2 for contacting the friction plate 4, and a driving structure 6 fixedly installed on the internal gear sleeve 2;

[0026] Different from the traditional high-torque hydraulic brake: The driving structure 6 includes a cylinder block 61 fixedly installed at the end of the internal gear sleeve 2 away from the gland 3, and a piston 62 axially moving on the internal gear sleeve 2 for driving the mating steel sheet 5 and the friction plate 4 to move closer to the gland 3. The piston 62 is inserted into the interior of the cylinder block 61 away from the internal gear sleeve 2 and is slidably connected to the cylinder block 61. The contact area between the cylinder block 61 and the piston 62 is large, and the torque is large, which is suitable for working conditions with high speed and high torque. The cylinder block 61 is provided with a liquid inlet 611 for introducing liquid to make the piston 62 extend out of the cylinder block 61; The driving structure 6 further includes a return spring 63 arranged on the internal gear sleeve 2 for resetting the piston 62. Among them, the elastic force of the return spring 63 can always press the piston 62 to the right to keep the steel sheet 5 and the friction plate 4 in a separated state, which is a normally open structure and can better meet the working conditions that need to be separated for a long time.

[0027] In the initial state, the left side of the piston 62 is always pressed by the return spring 63 to keep the steel sheet 5 and the friction plate 4 in a separated state. At this time, the brake is in the released state; During braking, when the pressure source supplies oil, the return spring 63 is compressed to press the steel sheet 5 and the friction plate 4 to the left, so that the steel sheet 5 and the friction plate 4 contact and generate friction, forcing the steel sheet 5 to brake, achieving the purpose of braking or decelerating. After braking is completed, when the pressure source cuts off the oil, under the action of the return spring 63, the piston 62 returns to the initial position to the right, and the steel sheet 5 and the friction plate 4 are separated. At this time, the brake is in the released state.

[0028] Through a plurality of friction plates 4 and a plurality of mating steel sheets 5, during braking, the steel sheet 5 moves in the direction close to the friction plate 4 under the extrusion of the piston 62, so that the steel sheet 5 contacts and rubs against the friction plate 4, effectively increasing the friction contact area of the brake, thereby improving the braking efficiency.

[0029] Specifically, a sealing ring 621 is provided on the piston 62 for sealing the gap between the piston 62 and the cylinder block 61.

[0030] Specifically, there are three groups of return springs 63, with three in each group. A spring hole 21 for installing the return spring 63 is provided at one end of the inner gear sleeve 2 facing the piston 62; the specification of the return spring 63 is increased, the return force is enhanced, and the return speed is fast; the problem of slow return of the hydraulic brake is solved.

[0031] Specifically, a square groove 22 communicating with the inner circle of the inner gear sleeve 2 is provided at the port of the spring hole 21. A square groove 22 is slidably connected with an outer angle 622 fixedly connected to the outer wall of the piston 62 and in contact with the return spring 63. As Figure 3 shown, the outer angle 622 on the piston 62 can axially move in the outer groove square groove 22 of the inner gear sleeve 2, and the outer angle 622 always presses the return spring 63. The structure of the inner gear sleeve 2 and the piston 62 has axial guiding and anti-rotation functions, and the braking is more stable and reliable

[0032] Specifically, the friction plate 4 is in a circular ring shape, and an inner tooth groove meshing with the outer tooth groove of the outer tooth shaft sleeve 1 is provided on the inner side wall of the friction plate 4.

[0033] Specifically, the steel sheet 5 is in a circular ring shape, and an outer tooth groove meshing with the inner tooth groove of the inner gear sleeve 2 is provided on the outer wall of the steel sheet 5.

[0034] Specifically, corresponding round holes are provided on the inner gear sleeve 2, the gland 3 and the cylinder block 61, and the hydraulic brake can be conveniently fixed on the fixing plate of the equipment through the round holes.

[0035] Specifically, the friction plate 4 is sintered from a copper-based wear-resistant material. It belongs to the metal friction plate 4, has a large friction coefficient and good wear resistance, and can effectively improve the service life of the brake.

[0036] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution and its concept of the present application, makes equivalent substitutions or changes, and should be covered within the protection scope of the present application.

Claims

1. A large-torque hydraulic brake, comprising an external tooth shaft sleeve (1), an internal tooth sleeve (2) sleeved on the external tooth shaft sleeve (1) and rotatably connected to the external tooth shaft sleeve (1), a gland (3) fixedly installed at one end of the internal tooth sleeve (2), a friction plate (4) axially moving on the external tooth shaft sleeve (1), a mating steel plate (5) axially moving inside the internal tooth sleeve (2) for contacting the friction plate (4), and a driving structure (6) fixedly installed on the internal tooth sleeve (2); It is characterized in that: The driving structure (6) includes a cylinder block (61) fixedly installed at one end of the internal tooth sleeve (2) away from the gland (3), and a piston (62) axially moving on the internal tooth sleeve (2) for driving the mating steel plate (5) and the friction plate (4) to move closer to the gland (3). The piston (62) is inserted into the interior of the cylinder block (61) away from the internal tooth sleeve (2) and is slidably connected to the cylinder block (61). A liquid inlet (611) is provided on the cylinder block (61) for introducing liquid to make the piston (62) extend from the cylinder block (61). The driving structure (6) further includes a return spring (63) provided on the internal tooth sleeve (2) for resetting the piston (62).

2. The large-torque hydraulic brake according to claim 1, characterized in that: A sealing ring (621) is provided on the piston (62) for sealing the gap between the piston (62) and the cylinder block (61).

3. The large-torque hydraulic brake according to claim 1, characterized in that: Three groups of the return springs (63) are provided, with three in each group. Spring holes (21) for installing the return springs (63) are provided at one end of the internal tooth sleeve (2) facing the piston (62).

4. The large-torque hydraulic brake according to claim 3, characterized in that: A square groove (22) communicating with the inner circle of the internal tooth sleeve (2) is provided at the port of the spring hole (21). An outer angle (622) fixedly connected to the outer wall of the piston (62) and contacting the return spring (63) is slidably connected in the square groove (22).

5. The large-torque hydraulic brake according to claim 1, characterized in that: The friction plate (4) is annular, and internal tooth grooves meshing with the external tooth grooves of the external tooth shaft sleeve (1) are provided on the inner side wall of the friction plate (4).

6. The large-torque hydraulic brake according to claim 1, characterized in that: The steel plate (5) is annular, and external tooth grooves meshing with the internal tooth grooves of the internal tooth sleeve (2) are provided on the outer wall of the steel plate (5).

7. The large torque hydraulic brake according to claim 1, characterized in that: Corresponding round holes are provided on the internal tooth sleeve (2), the gland (3) and the cylinder block (61).

8. The large-torque hydraulic brake according to claim 1, characterized in that: The friction plate (4) is sintered from a copper-based wear-resistant material.

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