CN221170484U

CN221170484U - Brake with manual release function

Info

Publication number: CN221170484U
Application number: CN202323262403.7U
Authority: CN
Inventors: 汪立平; 张明; 张�林
Original assignee: Jiangsu Hengli Hydraulic Technology Co Ltd
Current assignee: Jiangsu Hengli Hydraulic Technology Co Ltd
Priority date: 2023-11-30
Filing date: 2023-11-30
Publication date: 2024-06-18
Anticipated expiration: 2033-11-30

Abstract

The utility model relates to the technical field of brakes, in particular to a brake with a manual release function, which comprises a front shell, a rear cover, a main shaft, a friction pair, a piston, an elastic piece and a manual release piece, wherein the rear cover is connected with the front shell to form an inner cavity; the front end of the main shaft penetrates through the front shell, and the rear end of the main shaft is connected with the rear cover; the friction pair and the piston are both arranged in the front shell and are both sleeved on the main shaft, the piston is positioned at the rear of the friction pair, and an oil cavity is formed between the piston and the front shell; the front end of the elastic piece is propped against the piston, and the rear end of the elastic piece is propped against the rear cover; the front end of the manual release piece is connected with the piston, the rear end of the manual release piece penetrates through the rear cover, and an operation hole is formed in the rear end face of the manual release piece. According to the utility model, the manual release piece can drive the piston to move towards the rear end through the operation hole, so that the piston is separated from the friction pair when pressing the elastic piece, and the braking is stopped.

Description

Brake with manual release function

Technical Field

The utility model relates to the technical field of brakes, in particular to a brake with a manual release function.

Background

At present, in the existing brake for braking a hydraulic actuator, in a normal state, a piston is not contacted with a friction pair, and an output shaft can freely rotate; during braking, the elastic force of the spring enables the piston to be in contact with the friction pair, friction force is increased, and the output shaft cannot rotate. When braking is not needed, the hydraulic pump is used for supplying oil to the brake, and the piston is pushed to leave the friction pair so as to release the brake.

However, when the existing brake fails, hydraulic oil cannot push the piston to move backwards, and the brake cannot be released, so that the normal operation of the hydraulic execution device is affected.

Disclosure of utility model

The utility model aims to solve the technical problems that: the existing brake fails and cannot release the brake, so that the normal working of the hydraulic executive device is affected.

Therefore, the utility model provides the brake with the manual release function, when the hydraulic pressure can not release the brake, the manual release piece can be manually operated to release the brake, and the operation is convenient.

The technical scheme adopted for solving the technical problems is as follows: a brake with manual release function includes a front housing; the rear cover is connected with the front shell to form an inner cavity; the front end of the main shaft penetrates through the front shell, and the rear end of the main shaft is connected with the rear cover; the friction pair is arranged in the front shell and sleeved on the main shaft; the piston is arranged in the front shell, the piston is sleeved on the main shaft, the piston is positioned at the rear of the friction pair, and an oil cavity is formed between the piston and the front shell; the front end of the elastic piece is propped against the piston, and the rear end of the elastic piece is propped against the rear cover; the front end of the manual release piece is connected with the piston, the rear end of the manual release piece penetrates through the rear cover, and an operation hole is formed in the rear end face of the manual release piece.

According to the brake with the manual release function, a worker can drive the piston to move towards the rear end by operating the operation hole with a tool outside the brake, so that the piston is separated from the friction pair, and the brake release action is completed.

Further, the manual release piece comprises a limiting part and a connecting part, the front ends of the limiting part and the connecting part are fixedly connected, and the rear end face of the limiting part abuts against the piston.

Further, the diameter of the limiting part is larger than that of the connecting part.

Further, the connecting portion comprises a middle section and a tail section, the front end of the middle section is fixedly connected with the limiting portion, the rear end of the middle section is fixedly connected with the tail section, and the operation hole is formed in the rear end face of the tail section.

Further, a first seal is provided between the peripheral wall of the intermediate section and the rear cover.

Further, the piston comprises a first piston part and a second piston part, the second piston part is sleeved on the outer side face of the first piston part, and the first piston part and the second piston part are fixedly connected.

Further, the width of the first piston part is larger than that of the second piston part, an oil cavity is formed between the front end face of the second piston part and the front shell, a second sealing element is arranged between the outer peripheral wall of the second piston part and the front shell, and a third sealing element is arranged between the outer peripheral wall of the first piston part and the front shell.

Further, the front end of the first piston part inner ring is provided with a first side wall, the rear end of the first piston part inner ring is provided with a second side wall, an installation cavity is formed between the first side wall and the second side wall, and the rear end face of the limiting part abuts against the front end face of the second side wall.

Further, the width of the mounting cavity is larger than the width of the limiting part.

Further, the rear cover is provided with a through hole, and the middle section and the tail section are positioned in the through hole.

The hydraulic braking device has the advantages that when hydraulic braking fails, the manual release piece can be manually operated to release braking, so that safety is improved; the manual release part of the brake is normally arranged in the brake, and is not required to be assembled or disassembled, so that the operation is extremely simple; the manual release piece is easy to position through the through hole on the rear cover, so that the installation requirement is low, and the manufacturing cost is relatively low; and the first sealing piece arranged on the manual release piece is smaller in size and lower in sealing difficulty.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a schematic view of the overall assembly structure of the present utility model.

Fig. 2 is a schematic view of the manual release of the present utility model.

Fig. 3 is a schematic view of the assembly of the manual release and rear cover of the present utility model.

Fig. 4 is a schematic view of the piston structure of the present utility model.

Fig. 5 is a schematic view of the assembly of the manual release, piston and rear cover of the present utility model.

Fig. 6 is an enlarged partial schematic view of the rear end face of the present utility model.

In the figure: 1. a front housing; 2. a rear cover; 21. a through hole; 3. a friction pair; 4. a piston; 41. a first piston portion; 411. a third seal; 412. a first sidewall; 413. a second sidewall; 414. a mounting cavity; 42. a second piston portion; 421. a second seal; 5. an elastic member; 6. a main shaft; 7. a manual release; 71. an operation hole; 72. a limit part; 73. an intermediate section; 74. a tail section; 75. a first seal; 8. an oil chamber.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 6, this embodiment is a brake with a manual release function, which includes a front housing 1, a rear cover 2, a main shaft 6, a friction pair 3, a piston 4, an elastic member 5 and a manual release member 7, wherein the rear cover 2 is connected with the front housing 1 to form an inner cavity; the front end of the main shaft 6 penetrates through the front shell 1, and the rear end of the main shaft 6 is connected with the rear cover 2; the friction pair 3 is arranged in the front shell 1, and the friction pair 3 is sleeved on the main shaft 6; the piston 4 is arranged in the front shell 1, the piston 4 is sleeved on the main shaft 6, the piston 4 is positioned behind the friction pair 3, and an oil cavity 8 is formed between the piston 4 and the front shell 1; the front end of the elastic piece 5 is propped against the piston 4, and the rear end of the elastic piece 5 is propped against the rear cover 2; the front end of the manual release member 7 is connected with the piston 4, the rear end of the manual release member 7 penetrates through the rear cover 2, and the rear end surface of the manual release member 7 is provided with an operation hole 71. The operation hole 71 is an inner hexagonal hole, when the manual release function of the brake is needed, the manual release piece 7 can drive the piston 4 to move towards the rear end only by inserting the outer hexagonal wrench into the operation hole 71 and rotating the outer hexagonal wrench around the axis, so that the piston 4 is pressed against the elastic piece 5 and is separated from the friction pair 3, the brake release action is completed, the process is simple to operate, the brake is not required to be disassembled and assembled, and the safety of the brake is improved. If the manual release member 7 is not provided, when the brake fails, the brake cannot supply oil to the oil cavity 8 through the hydraulic pump, the elastic force of the elastic member 5 is counteracted and the elastic member 5 is compressed through the hydraulic pressure in the oil cavity 8, the brake can always keep a locking state, and when the main shaft 6 is required to rotate, the brake cannot rotate in a locking way, so that the normal operation of the main shaft 6 is prevented.

The manual release member 7 includes a stopper 72 and a connecting portion, the stopper 72 is fixedly connected to the front end of the connecting portion, and the rear end surface of the stopper 72 abuts against the piston 4. The diameter of the limiting portion 72 is larger than the diameter of the connecting portion. The diameter of the limiting part 72 is larger than that of the connecting part, so that an annular surface is formed at the connecting part between the limiting part 72 and the connecting part, positioning is facilitated, and installation is convenient.

The connecting portion includes intermediate section 73 and tail section 74, and the front end and the spacing portion 72 fixed connection of intermediate section 73, the rear end and the tail section 74 fixed connection of intermediate section 73, and the operating hole 71 sets up the rear end face at tail section 74. The rear cover 2 is provided with a through hole 21, and the middle section 73 and the tail section 74 are positioned in the through hole 21. The through hole 21 is internally provided with an internal thread. The outer peripheral wall of the tail section 74 is provided with external threads, and the external threads of the tail section 74 are matched with the internal threads of the through hole 21, so that the manual release member 7 can be displaced towards the front end or towards the rear end along the through hole 21 relative to the rear cover 2 by matching the engagement action between the threads with the operation hole 71. Normally, the piston 4 can be displaced by 1mm towards the rear end to completely release the brake, so that the pitch of the screw thread is set to be 1mm, a worker rotates the operation hole 71 outside the brake by using a tool, and the operation hole 71 can drive the piston to be displaced by 1mm towards the rear end after rotating once, so that the piston 4 can be separated from the friction pair 3, and the brake is released. A first seal 75 is provided between the peripheral wall of the intermediate section 73 and the rear cover 2. The first seal 75 is sleeved on the manual release 7, is small in size and easy to install, and is beneficial to improving sealing performance.

The friction pair 3 comprises a plurality of steel sheets and a plurality of friction plates, the steel sheets are fixedly connected with the front shell 1, the friction plates are fixedly connected with the main shaft 6, one friction plate is arranged between every two adjacent steel sheets, when braking is needed, oil in the oil cavity 8 flows back into the hydraulic pump, oil pressure in the oil cavity 8 is reduced, the elastic piece 5 rebounds to push the piston 4 to move away from the rear cover 2 to the front shell 1, the piston 4 compresses the friction pair 3, so that huge friction force formed between the plurality of steel sheets and the friction plates prevents the main shaft 6 from rotating relative to the front shell 1, and braking is completed.

The piston 4 comprises a first piston part 41 and a second piston part 42, the second piston part 42 is sleeved on the outer side surface of the first piston part 41, and the first piston part 41 and the second piston part 42 are fixedly connected. The width of the first piston portion 41 is larger than the width of the second piston portion 42, an oil chamber 8 is formed between the front end surface of the second piston portion 42 and the front housing 1, a second seal 421 is provided between the outer peripheral wall of the second piston portion 42 and the front housing 1, and a third seal 411 is provided between the outer peripheral wall of the first piston portion 41 and the front housing 1. By arranging the second sealing element 421 and the third sealing element 411, the sealing performance of the oil cavity 8 is improved, the pressure stability of oil in the oil cavity 8 is ensured, and the reliability and safety of brake action implementation and release of a brake are improved. When the brake is required to be released, hydraulic oil is introduced into the oil cavity 8 to push the piston 4 to move backwards, and the piston 4 is separated from the friction pair 3.

The front end of the inner ring of the first piston part 41 is provided with a first side wall 412, the rear end of the inner ring of the first piston part 41 is provided with a second side wall 413, a mounting cavity 414 is formed between the first side wall 412 and the second side wall 413, and the rear end face of the limiting part 72 abuts against the front end face of the second side wall 413. The mounting cavity 414 has a width greater than the width of the stop portion 72. The width of the mounting cavity 414 can be controlled through the interval distance between the first side wall 412 and the second side wall 413, the mounting requirement on the limiting part 72 is reduced, the limiting part 72 is limited through the second side wall 413, the contact area between the first side wall 412 and the friction pair 3 is increased when braking is carried out, the braking effect is further improved, and the safety is ensured.

Working principle: when braking is required in this embodiment, the oil in the oil chamber 8 flows back to the hydraulic pump, the oil pressure in the oil chamber 8 is reduced, the elastic force of the elastic member 5 is greater than the pressure in the oil chamber 8, the elastic member 5 rebounds to push the piston 4 to move away from the rear cover 2 toward the front housing 1, the first side wall 412 compresses the friction pair 3 to cause a great friction force formed between a plurality of steel sheets and friction sheets to prevent the spindle 6 from rotating relatively to the front housing 1, and braking is completed. When the present embodiment needs to stop braking, the hydraulic pump normally feeds oil to the oil chamber 8, and the elastic member 5 is compressed by the hydraulic pressure in the oil chamber 8, so that the first side wall 412 is separated from the friction tightening pair 3. When the hydraulic pressure can not push the piston 4, a manual release function can be adopted, at this time, the outer hexagonal wrench is inserted into the operation hole 71 and rotates around the axis, and the outer thread of the tail section 74 and the inner thread of the through hole 21 are matched, so that the manual release member 7 can drive the piston 4 to displace towards the rear end, the piston 4 is separated from the friction pair 3 while pressing the elastic member 5, the brake is stopped, the safety and the reliability of the embodiment are improved through the dual guarantee of hydraulic control and manual control, and the manual release member of the brake is normally arranged in the brake without assembly and disassembly, and has extremely simple operation.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined as the scope of the claims.

Claims

1. A brake having a manual release function, characterized in that: comprising

A front case (1);

The rear cover (2) is connected with the front shell (1) to form an inner cavity;

The front end of the main shaft (6) penetrates through the front shell (1), and the rear end of the main shaft (6) is connected with the rear cover (2);

The friction pair (3) is arranged in the front shell (1), and the friction pair (3) is sleeved on the main shaft (6);

The piston (4) is arranged in the front shell (1), the piston (4) is sleeved on the main shaft (6), the piston (4) is positioned behind the friction pair (3), and an oil cavity (8) is formed between the piston (4) and the front shell (1);

The front end of the elastic piece (5) is propped against the piston (4), and the rear end of the elastic piece (5) is propped against the rear cover (2);

The manual release piece (7), the front end of manual release piece (7) links to each other with piston (4), the rear end of manual release piece (7) runs through back lid (2), the rear end face of manual release piece (7) is equipped with operation hole (71).

2. The brake with manual release function according to claim 1, wherein: the manual release piece (7) comprises a limiting part (72) and a connecting part, the limiting part (72) is fixedly connected with the front end of the connecting part, and the rear end face of the limiting part (72) abuts against the piston (4).

3. The brake with manual release function according to claim 2, wherein: the diameter of the limiting part (72) is larger than that of the connecting part.

4. A brake with manual release function according to claim 3, characterized in that: the connecting portion comprises a middle section (73) and a tail section (74), the front end of the middle section (73) is fixedly connected with the limiting portion (72), the rear end of the middle section (73) is fixedly connected with the tail section (74), and the operation hole (71) is formed in the rear end face of the tail section (74).

5. The brake with manual release function according to claim 4, wherein: a first seal (75) is arranged between the outer peripheral wall of the intermediate section (73) and the rear cover (2).

6. The brake with manual release function according to claim 5, wherein: the piston (4) comprises a first piston part (41) and a second piston part (42), the second piston part (42) is sleeved on the outer side surface of the first piston part (41), and the first piston part (41) and the second piston part (42) are fixedly connected.

7. The brake with manual release function according to claim 6, wherein: the width of the first piston part (41) is larger than that of the second piston part (42), an oil cavity (8) is formed between the front end face of the second piston part (42) and the front shell (1), a second sealing piece (421) is arranged between the outer peripheral wall of the second piston part (42) and the front shell (1), and a third sealing piece (411) is arranged between the outer peripheral wall of the first piston part (41) and the front shell (1).

8. The brake with manual release function according to claim 7, wherein: the front end of the inner ring of the first piston part (41) is provided with a first side wall (412), the rear end of the inner ring of the first piston part (41) is provided with a second side wall (413), a mounting cavity (414) is formed between the first side wall (412) and the second side wall (413), and the rear end face of the limiting part (72) abuts against the front end face of the second side wall (413).

9. The brake with manual release function according to claim 8, wherein: the width of the mounting cavity (414) is larger than that of the limiting part (72).

10. The brake with manual release function according to claim 9, wherein: the rear cover (2) is provided with a through hole (21), and the middle section (73) and the tail section (74) are positioned in the through hole (21).