A brake mechanism

Abstract

The invention discloses a brake mechanism, comprising a first caliper body, a second caliper body, a first pin shaft, an elastic member and a driving device; the first caliper body and the second caliper body are hinged by the first pin shaft; the first caliper body is provided with a first clamping part, the second caliper body is provided with a second clamping part, the first clamping part and the second clamping part are arranged oppositely to form a jaw; the elastic member is arranged between the first caliper body and the second caliper body to reduce the jaw opening; the driving device is arranged between the first caliper body and the second caliper body to increase the jaw opening. The brake mechanism has the advantages of simple structure, reliable working performance and the like.

Description

Technical Field

[0001] The invention relates to the technical field of clamping mechanisms, and in particular to a braking mechanism. Background Art

[0002] In the machinery industry, clamping and braking mechanisms are widely used in linear axis movement and rotary axis rotation. Reliable and effective clamping mechanisms are the prerequisite for ensuring the normal operation of components and the machining accuracy of machine tools. For example, the swing head in CNC machine tools, usually called the B-axis, turntable, etc., needs to be positioned and processed on the specified plane or directional features of the workpiece, which requires the corresponding rotary axis to be able to quickly position, clamp and release; in addition, in the event of a sudden power failure in the machine tool, it can quickly respond to clamp the swing axis or linear axis to prevent unnecessary collisions. However, the existing clamping and braking mechanisms have problems such as complex structure, high processing cost, and unreliable operation. Summary of the invention

[0003] The invention provides a braking mechanism, which solves the problem that the existing braking mechanism has a complex structure and causes high production cost.

[0004] The technical means adopted by the present invention are as follows:

[0005] A brake mechanism comprises a first caliper body, a second caliper body, a first pin shaft, an elastic member and a driving device;

[0006] The first caliper body and the second caliper body are hingedly connected via the first pin shaft;

[0007] The first clamp body is provided with a first clamping portion, the second clamp body is provided with a second clamping portion, and the first clamping portion and the second clamping portion are arranged opposite to each other to form a jaw;

[0008] The elastic member is disposed between the first pliers body and the second pliers body to reduce the opening of the pliers;

[0009] The driving device is arranged between the first pliers body and the second pliers body and can be used to increase the opening of the pliers.

[0010] Furthermore, the driving device is a hydraulic cylinder, which is located on one side of the first caliper body / the second caliper body, the first caliper body is provided with a first through hole, the second caliper body is provided with a second through hole, the piston rod of the hydraulic cylinder passes through the first through hole and the second through hole, and a second pin shaft is provided at the end of the piston rod for limiting the piston rod to the caliper body.

[0011] Furthermore, the elastic member is sleeved on the piston rod.

[0012] Furthermore, the elastic member is a disc spring.

[0013] Furthermore, the hardness of the first clamping portion and the second clamping portion is smaller than the hardness of the caliper body.

[0014] Furthermore, the first clamping portion has a first clamping surface, the second clamping portion has a second clamping surface, and the first clamping surface and / or the second clamping surface are in line contact with the clamped workpiece.

[0015] Furthermore, the cross-sectional shape of the first clamping surface and / or the second clamping surface is an arc surface.

[0016] Furthermore, the jaws and the hydraulic cylinder are located on the same side or opposite sides of the clamp body.

[0017] Furthermore, the length of the arm of force between the piston rod and the first pin is greater than the length of the arm of force between the jaw and the first pin.

[0018] Compared with the prior art, the braking mechanism described in the present invention has the following advantages: 1. The braking mechanism disclosed in the present invention has a small number of components, a simple structure, and is easy to produce and process; 2. When the braking mechanism disclosed in the present invention is in a state of clamping a workpiece, the clamping force is provided by an elastic member, which reduces energy consumption and ensures the reliability of clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the braking mechanism disclosed in the present invention.

[0020] In the figure: 1. first pliers body, 10. first clamping part, 11. first through hole, 12. first clamping surface, 2. second pliers body, 20. second clamping part, 21. second through hole, 22. second clamping surface, 3. first pin shaft, 4. elastic member, 5. hydraulic cylinder, 50. piston rod, 6. jaws, 7. second pin shaft, 8. clamped workpiece. DETAILED DESCRIPTION

[0021] like Figure 1The brake mechanism disclosed in the present invention is shown, comprising a first caliper body 1, a second caliper body 2, a first pin shaft 3, an elastic member 4 and a driving device; the first caliper body 1 and the second caliper body 2 are hinged through the first pin shaft 3; the first caliper body 1 is provided with a first clamping portion 10, the second caliper body 2 is provided with a second clamping portion 20, the first clamping portion 10 and the second clamping portion 20 are arranged opposite to each other to form a jaw 60; the elastic member 4 is placed between the first caliper body 1 and the second caliper body 2 to reduce the opening of the jaw 6; the driving device is arranged at the first caliper body 1 and the second caliper body 2 can be used to increase the jaw opening. Specifically, in this embodiment, the driving device is a hydraulic cylinder 5, and the hydraulic cylinder 5 is located on one side of the first caliper body / the second caliper body. In the figure, the hydraulic cylinder 5 is located on one side of the second caliper body 2. The first caliper body 1 is provided with a first through hole 11, and the second caliper body 2 is provided with a second through hole 21. The piston rod 50 of the hydraulic cylinder 5 passes through the second through hole 21 and the first through hole 20, and a second pin 7 for limiting the piston rod 50 on the caliper body is provided at the end of the piston rod 50.

[0022] The working principle of the brake mechanism disclosed in the present invention is as follows: when it is necessary to clamp the clamped workpiece, hydraulic oil is not introduced into the hydraulic cylinder, the hydraulic cylinder does not work, and the first caliper body and the second caliper body rotate relative to each other around the first pin shaft (in the direction shown in BB in the figure) under the action of the elastic member, so that the distance between the first caliper body and the second caliper body at one end of which the elastic member is provided increases (in the direction shown in AA in the figure), thereby reducing the opening of the jaws for clamping the clamped workpiece. At this time, the elastic member is used to provide a clamping force for clamping the clamped workpiece. When it is necessary to loosen the clamped workpiece, hydraulic oil is introduced into the hydraulic cylinder, the piston rod moves and pulls the first caliper body to rotate toward the second caliper body through the second pin shaft, and the first caliper body and the second caliper body rotate around the first pin shaft, so that the distance between the first caliper body and the second caliper body at one end of which the elastic member is provided decreases, thereby increasing the opening of the jaws for loosening the clamped workpiece.

[0023] Furthermore, the elastic member 4 is sleeved on the piston rod 50. The elastic member is a disc spring. The elastic member adopts a disc spring and is sleeved on the piston rod, which can further reduce the volume and provide sufficient clamping force.

[0024] Furthermore, the hardness of the first clamping part 10 and the second clamping part 20 is less than the hardness of the pliers body, that is, the clamping part is made of a relatively soft material, such as tin bronze or beryllium bronze, and the pliers body can be made of a harder material, such as 45 steel or QT600. The clamping part is made of a relatively soft material, which can ensure that the clamped workpiece is not damaged or worn when being clamped.

[0025] Furthermore, the first clamping portion 10 has a first clamping surface 12, and the second clamping portion 20 has a second clamping surface 22. The first clamping surface 12 and / or the second clamping surface 22 are in line contact with the clamped workpiece 8. The use of line contact ensures that the clamped workpiece is in close contact with the clamping surface, thereby improving the reliability of clamping. Preferably, both the first clamping surface and the second clamping surface are in line contact with the workpiece.

[0026] Furthermore, the cross-sectional shape of the first clamping surface 12 and / or the second clamping surface 22 is an arc surface. The arc surface is convenient for processing and at the same time ensures that the clamped workpiece is in line contact with the clamping surface, thereby improving the reliability of clamping. In this embodiment, a round rod with relatively soft hardness is embedded in the clamping part to form the first clamping surface and the second clamping surface in the shape of an arc surface.

[0027] Furthermore, the arm length between the piston rod 50 and the first pin 3 is greater than the arm length between the jaws 6 and the first pin 3, so that a relatively small spring force can produce a relatively large clamping force.

[0028] Furthermore, the jaws and the hydraulic cylinder are located on the same side or opposite sides of the clamp body. Figure 1 The middle jaw and the hydraulic cylinder are located on the same side of the jaw body, so that the jaw and the elastic member are located on both sides or the same side of the first pin shaft (in the figure, the jaw and the elastic member are located on both sides of the first pin shaft in the horizontal direction), which can further reduce the space occupied by the mechanism.

[0029] 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 technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A braking mechanism, Features: It includes a first clamp body, a second clamp body, a first pin shaft, an elastic member and a driving device; The first caliper body and the second caliper body are hingedly connected via the first pin shaft; The first clamp body is provided with a first clamping portion, the second clamp body is provided with a second clamping portion, and the first clamping portion and the second clamping portion are arranged opposite to each other to form a jaw; The elastic member is disposed between the first pliers body and the second pliers body to reduce the jaw opening, and the elastic member is used to provide a clamping force for clamping the workpiece and to clamp the workpiece; The driving device is arranged between the first pliers body and the second pliers body and can be used to increase the opening of the pliers mouth and release the clamped workpiece; The first clamping part and the second clamping part are embedded with round bars to form a first clamping surface and a second clamping surface in the shape of an arc surface. The first clamping surface and / or the second clamping surface are in line contact with the clamped workpiece.

2. The brake mechanism according to claim 1, Features: The driving device is a hydraulic cylinder, which is located on one side of the first caliper body / the second caliper body. The first caliper body is provided with a first through hole, and the second caliper body is provided with a second through hole. The piston rod of the hydraulic cylinder passes through the first through hole and the second through hole, and a second pin shaft is provided at the end of the piston rod for limiting the piston rod to the caliper body.

3. The brake mechanism according to claim 2, Features: The elastic member is sleeved on the piston rod.

4. The brake mechanism according to any one of claims 1 to 3, Features: The elastic member is a disc spring.

5. The brake mechanism according to claim 1, Features: The hardness of the first clamping portion and the second clamping portion is less than the hardness of the caliper body.

6. The brake mechanism according to claim 2, Features: The jaws and the hydraulic cylinder are located on the same side or opposite sides of the pliers body.

7. The brake mechanism according to claim 6, Features: The length of the force arm between the piston rod and the first pin is greater than the length of the force arm between the jaw and the first pin.

Images