Self-locking brake

Abstract

The invention discloses a self-locking brake, comprising an electromagnetic release mechanism, a self-locking claw and a shaft sleeve; the electromagnetic release mechanism comprises an electromagnet and a first spring, the first spring is arranged between the electromagnet and the self-locking claw, and when the electromagnet is powered off, the self-locking claw can be bounced toward the shaft sleeve through the first spring, so that the self-locking claw holds the shaft sleeve. The purpose of the self-locking brake is to solve the problem of poor comprehensive performance of existing brakes.

Description

Technical Field

[0001] The invention belongs to the technical field of machine equipment braking, and in particular relates to a self-locking brake. Background Art

[0002] Most machines and equipment are now equipped with brakes to ensure that the machines and equipment stop working completely in the shortest possible time when an accident occurs. Brakes are mainly divided into electromagnetic and hydraulic types. Electromagnetic brakes have a small braking torque, poor braking effect, and slow braking speed. Hydraulic brakes have good braking effect, but are larger in size. With the increase in the types of machines and equipment, the requirements for brakes are getting higher and higher. While ensuring the braking effect, the braking speed must also be guaranteed. In addition, the volume requirements for brakes are also more stringent. Traditional brakes have gradually become difficult to meet the needs of machines.

[0003] In order to solve the problem of poor comprehensive performance of existing brakes, the present invention provides a self-locking brake. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the present invention is that the comprehensive performance of the existing brakes is poor.

[0006] (II) Technical solution

[0007] The present invention provides a self-locking brake, comprising an electromagnetic release mechanism, a self-locking claw and a shaft sleeve; the electromagnetic release mechanism comprises an electromagnet and a first spring, the first spring is arranged between the electromagnet and the self-locking claw, and the electromagnet can bounce the self-locking claw toward the shaft sleeve through the first spring when the power is off, so that the self-locking claw holds the shaft sleeve.

[0008] Optionally, the self-locking brake also includes a base plate and an outer shell, the outer shell cover is arranged on the base plate, the self-locking claw is claw-shaped, and the self-locking claw includes a claw tip section, a middle section and a connecting section connected in sequence, and the connecting section is movably connected to the inner wall of the outer shell.

[0009] Optionally, the inner surface of the claw tip section is provided with serrated stripes.

[0010] Optionally, the angle formed between the claw tip section and the middle section is greater than 90°, and the angle opens inward.

[0011] Optionally, the self-locking brake also includes a flexible adjustment mechanism, which includes a second spring and a connecting block, one end of the self-locking claw is movably connected to the inner wall of the outer shell through the connecting block, and the second spring is arranged in a compressed state between the connecting block and the inner wall of the outer shell.

[0012] Optionally, the housing includes a first baffle and a connecting block extension hole opened on the first baffle, the connecting block passes through the connecting block extension hole and is connected to the connecting section, and the second spring is arranged between the connecting block and the first baffle in a compressed state.

[0013] Optionally, the housing further includes a fixing hole, a stepped hole and a spring limiting hole, the positioning hole is used to install the electromagnet, the stepped hole is used to install the bushing, and the spring limiting hole is used to install the second spring.

[0014] Optionally, the flexibility adjustment mechanism further includes an adjusting screw, and the adjusting screw is used to adjust the elastic force of the second spring.

[0015] Optionally, the connecting block includes a second baffle plate and a second spring limiting hole provided on the second baffle plate, one end of the adjusting screw contacts the second baffle plate, and the second spring limiting hole is used for installing the second spring.

[0016] Optionally, there are two self-locking claws, which are symmetrically distributed, and the sleeve is arranged between the two self-locking claws.

[0017] (III) Beneficial effects

[0018] The above technical solution of the present invention has the following advantages:

[0019] When the self-locking brake provided by the present invention is powered off, the electromagnetic release mechanism quickly bounces the self-locking claw toward the shaft sleeve of the rotating shaft, and the electromagnetic release mechanism provides initial pressure for the self-locking claw. At this time, the rotating shaft is affected by the pressure to generate friction, and the friction causes the self-locking claw to rotate around the connection of the self-locking claw. Affected by the shape of the self-locking claw, the contact between the self-locking claw and the shaft sleeve is an inclined surface. At this time, the friction drives the self-locking claw to rotate, and at the same time, pressure is generated here, and part of the pressure is converted into friction. Therefore, the friction and pressure here gradually increase, forming a self-locking effect, which can stop the rotating shaft in a very short time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the internal structure of a self-locking brake provided in an embodiment of the present invention;

[0021] Figure 2 A schematic structural diagram of a self-locking claw in a self-locking brake provided in an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the structure of a connection block in a self-locking brake provided in an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the overall structure of a self-locking brake provided by an embodiment of the present invention;

[0024] Figure 5 A schematic diagram of the housing structure of a self-locking brake provided in an embodiment of the present invention.

[0025] In the figure: 1, bottom plate; 2, outer shell; 21, fixing hole; 22, stepped hole; 23, first spring limiting hole; 24, connecting block extension hole; 25, first baffle; 3, connecting block; 31, second spring limiting hole; 32, second baffle; 4, second spring; 5, self-locking claw; 51, claw tip section; 511, serrated stripes; 52, middle section; 53, connecting section; 6, electromagnet; 61, armature; 7, first spring; 8, bushing; 81, keyway; 9, adjusting screw. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figure 1 As shown, an embodiment of the present invention provides a self-locking brake, including an electromagnetic release mechanism, a self-locking claw 5 and a sleeve 8; the electromagnetic release mechanism includes an electromagnet 6 and a first spring 7, the first spring 7 is arranged between the electromagnet 6 and the self-locking claw 5, and the electromagnet 6 can bounce the self-locking claw 5 toward the sleeve 8 through the first spring 7 when the power is off, so that the self-locking claw 5 holds the sleeve 8.

[0030] In this embodiment, when in use, when the self-locking brake is powered off, the electromagnetic release mechanism quickly bounces the self-locking claw 5 toward the shaft sleeve 8 of the rotating shaft, and the electromagnetic release mechanism provides initial pressure for the self-locking claw 5. At this time, the rotating shaft is affected by the pressure and generates friction. The friction causes the self-locking claw 5 to rotate around the connection of the self-locking claw. Affected by the shape of the self-locking claw 5, the contact between the self-locking claw 5 and the shaft sleeve 8 is an inclined surface. At this time, the friction drives the self-locking claw 5 to rotate, and at the same time, pressure is generated here, and part of the pressure is converted into friction. Therefore, the friction and pressure here gradually increase, forming a self-locking effect, which can stop the rotating shaft in a very short time.

[0031] Specifically, the self-locking claw 5 is installed on the slider, and the electromagnet 6 is arranged behind the slider to control the forward and backward movement of the slider. The self-locking claw 5 is designed to be opposite, and the opening and closing of the self-locking claw 5 is controlled by a connecting rod mechanism to realize the release and control of the rotating shaft.

[0032] Optional, such as Figure 1 As shown, an armature 61 is provided between the electromagnet 6 and the first spring 7, and one end of the first spring 7 is in contact with the armature 61. Specifically, the electromagnet 6 and the armature 61 are rectangular.

[0033] In some optional embodiments, such as Figure 2 As shown, the self-locking brake further includes a bottom plate 1 and a housing 2, the housing 2 is covered on the bottom plate 1, the self-locking claw 5 is claw-shaped, and the self-locking claw 5 includes a claw tip section 51, a middle section 52 and a connecting section 53 connected in sequence, and the connecting section 53 is movably connected to the inner wall of the housing 1. The self-locking claw 5 is designed to be claw-shaped in order to better lock the shaft sleeve 8 and generate greater pressure and friction, and the connecting section 53 is used to connect the self-locking claw 5 to the inner wall of the housing 2.

[0034] In some optional embodiments, such as Figure 3 As shown, the inner surface of the claw tip section 51 is provided with sawtooth stripes 511. Specifically, the self-locking claw 5 is designed to be approximately U-shaped, so that the pressure can generate friction as much as possible, so that the torque of the rotating shaft can be converted into braking torque as much as possible. The setting of the sawtooth stripes 511 is to increase the friction generated when the self-locking claw 5 contacts the shaft sleeve 8, so that the friction generated by the two is greater. The surface where the sawtooth stripes 511 are located is a plane, ensuring that the surface can be tangent to the shaft sleeve 8 when rotating.

[0035] Optionally, the sawtooth stripes 511 are surface convex particles or a mesh structure. There is no specific limitation, as long as the friction of the self-locking claw 5 can be increased. In addition, the surface where the sawtooth stripes 511 are located can be replaced with a composite material with good wear resistance and anti-slip.

[0036] In some optional embodiments, the angle formed between the claw tip section 51 and the middle section 52 is greater than 90°, and the angle opens inward. Specifically, the angle formed between the claw tip section 51 and the middle section 52 inward refers to the direction of the self-locking claw 5 pointing to the concave part.

[0037] In some optional embodiments, such as Figure 2 As shown, the self-locking brake also includes a flexible adjustment mechanism, which includes a second spring 4 and a connecting block 3. One end of the self-locking claw 5 is movably connected to the inner wall of the shell 2 through the connecting block 3, and the second spring 4 is arranged in a compressed state between the connecting block 3 and the inner wall of the shell 2.

[0038] In this embodiment, when the torque of the rotating shaft is large, the friction and pressure generated before the rotating shaft stops will be large. Therefore, when the pressure exceeds the elastic force of the second spring 4 in the flexible adjustment mechanism, the elastic force of the second spring 4 will absorb part of the pressure to ensure that the rotating shaft and the self-locking claw 5 will not be damaged. In addition, since the connection of the self-locking claw 5 at the inner wall is unilateral, the force is unbalanced. The flexible adjustment mechanism can adjust the impact of the unbalanced force and extend the service life of the self-locking brake.

[0039] In some optional embodiments, such as Figure 5 As shown, the housing 2 includes a first baffle plate 25 and a connecting block extension hole 24 opened on the first baffle plate 25, the connecting block 3 passes through the connecting block extension hole 24 and is connected to the connecting section 53, and the second spring 4 is arranged between the connecting block 3 and the first baffle plate 25 in a compressed state.

[0040] In some optional embodiments, such as Figure 5 As shown, the housing 2 further includes a fixing hole 21 , a stepped hole 22 and a first spring limiting hole 23 . The fixing hole 21 is used to install the electromagnet 6 , the stepped hole 22 is used to install the sleeve 8 , and the first spring limiting hole 23 is used to install the second spring 4 .

[0041] In some optional embodiments, such as Figure 1 As shown, the flexibility adjustment mechanism further includes an adjustment screw 9 , and the adjustment screw 9 is used to adjust the elastic force of the second spring 4 .

[0042] In this embodiment, before the shaft sleeve 8 stops rotating, the pressure generated at the contact point between the self-locking claw 5 and the shaft sleeve 8 gradually increases. When the pressure generated reaches the set value, the flexible adjustment mechanism will absorb the pressure generated here. The second spring 4 is arranged between the first baffle 25 and the second baffle 32. In the first spring limiting hole 23, under the action of the adjusting screw 9, the second spring 4 is compressed to generate elastic force. When the pressure of the self-locking claw 5 is greater than the elastic force of the second spring 4, the second spring 4 will absorb part of the pressure and convert it into elastic force to avoid damage to the self-locking brake; when the self-locking brake is working, the flexible adjustment mechanism can also absorb part of the concentrated force.

[0043] In some optional embodiments, such as Figure 4 As shown, the connecting block 3 includes a second baffle plate 32 and a second spring limiting hole 31 opened on the second baffle plate 32 , one end of the adjusting screw 9 contacts the second baffle plate 32 , and the second spring limiting hole 31 is used to install the second spring 4 .

[0044] In some optional embodiments, such as Figure 1 As shown, there are two self-locking claws 5, which are symmetrically distributed, and the shaft sleeve 8 is arranged between the two self-locking claws 5. The self-locking claws 5 are symmetrically arranged to better lock the shaft sleeve 8 when the self-locking brake is working, and the force is more even.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A self-locking brake, characterized in that: It includes an electromagnetic release mechanism, a self-locking claw and a shaft sleeve; the electromagnetic release mechanism includes an electromagnet and a first spring, the first spring is arranged between the electromagnet and the self-locking claw, and when the electromagnet is powered off, the self-locking claw can be bounced toward the shaft sleeve through the first spring, so that the self-locking claw holds the shaft sleeve; It also includes a bottom plate and a shell, wherein the shell cover is arranged on the bottom plate, the self-locking claw is claw-shaped, and the self-locking claw includes a claw tip section, a middle section and a connecting section connected in sequence, the connecting section is movably connected to the inner wall of the shell, the inner surface of the claw tip section is provided with sawtooth stripes, and the angle formed between the claw tip section and the middle section is greater than 90°, and the angle opens inward; It also includes a flexible adjustment mechanism, which includes a second spring and a connecting block, one end of the self-locking claw is movably connected to the inner wall of the shell through the connecting block, and the second spring is arranged between the connecting block and the inner wall of the shell in a compressed state; the shell includes a first baffle and a connecting block extension hole opened on the first baffle, the connecting block passes through the connecting block extension hole and is connected to the connecting section, and the second spring is arranged between the connecting block and the first baffle in a compressed state.

2. The self-locking brake according to claim 1, characterized in that: The housing further comprises a fixing hole, a stepped hole and a spring limiting hole, wherein the fixing hole is used for installing the electromagnet, the stepped hole is used for installing the shaft sleeve, and the spring limiting hole is used for installing the second spring.

3. The self-locking brake according to claim 1, characterized in that: The flexibility adjustment mechanism also includes an adjustment screw, and the adjustment screw is used to adjust the elastic force of the second spring.

4. The self-locking brake according to claim 3, characterized in that: The connecting block includes a second baffle plate and a second spring limiting hole formed on the second baffle plate, one end of the adjusting screw contacts the second baffle plate, and the second spring limiting hole is used for installing the second spring.

5. The self-locking brake according to any one of claims 1 to 4, characterized in that: There are two self-locking claws, which are symmetrically distributed, and the shaft sleeve is arranged between the two self-locking claws.

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