One-way motor self-locking device

Abstract

The utility model provides a one-way motor self-locking device, which comprises a motor main body and a gear box connected to the motor main body, a transmission shaft is arranged in the motor main body, and a worm gear is arranged in the gear box, and is characterized in that one end of the transmission shaft is meshed with the worm gear, and the other end of the transmission shaft is positioned in the motor main body; the transmission shaft is further connected with a brake ring capable of limiting, the gear box is provided with an installation part for installation of the brake ring, and the brake ring can release or tightly hold the transmission shaft. According to the structure, small friction force is used for increasing resistance to the rotating shaft of the motor, the braking self-locking effect is achieved, the structure is simple, the light-load effect is obvious, the electric lifting table with the load can be effectively prevented from sliding down under the action of the brake ring when the table stops, and the service life of the table is prolonged. Meanwhile, the situation that the electric lifting table is prone to sliding down due to the fact that the electric lifting table is loaded for a long time after being used for a period of time is effectively avoided, and the using effect is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of electric furniture technology and relates to a one-way motor self-locking device. Background Technology

[0002] Currently, most motors on the market have a worm gear and a drive shaft inside the motor housing, with the drive shaft driving the worm gear to rotate. When the motor is installed in conjunction with an electric lifting table, the table will slide down under the influence of gravity because it is under load when rising and when stopping. This can also occur after a period of use due to prolonged load, making the electric lifting table inconvenient to use. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a compact and stable unidirectional motor self-locking device.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A one-way motor self-locking device includes a motor body and a gearbox connected to the motor body. The motor body has a drive shaft inside, and the gearbox has a worm gear inside. The characteristic is that one end of the drive shaft meshes with the worm gear, and the other end is located inside the motor body. A brake ring capable of limiting the position is also connected to the drive shaft. The gearbox has a mounting part for mounting the brake ring, and the brake ring can release or lock the drive shaft.

[0006] In the aforementioned unidirectional motor self-locking device, the brake ring is annularly open, and the opening also has an outwardly extending contact block. A notch is provided at the mounting part, and the contact block is located at the notch.

[0007] The gearbox is connected to the motor body by bolts, etc. One end of the drive shaft is connected to the inside of the motor body, and the other end is connected to the worm gear inside the gearbox. In this way, the motor can drive the drive shaft to rotate, which in turn drives the worm gear to rotate.

[0008] The gearbox also has a mounting part for inserting the brake ring, and the mounting part also has a notch for inserting the contact block at the end of the brake ring. The brake ring is sleeved on the drive shaft, and the brake ring can release or tighten the drive shaft.

[0009] When the motor rotates forward, which drives the drive shaft to rotate forward, the brake ring contacts the trapezoidal notch at the gearbox mounting part. The force of the drive shaft rotating to the left is opposite to the force of the brake ring, so that the brake ring releases the drive shaft and is in a relaxed state.

[0010] When the motor reverses, that is, the transmission shaft is reversed, the brake ring contacts the right side of the trapezoidal notch at the gear box mounting portion, and the force of the transmission shaft is to the right. In this way, the brake ring holds the transmission shaft tightly, and the effect of the self-locking brake is achieved.

[0011] Such a structure uses small friction to increase the resistance of the motor shaft, which has the effect of a brake self-locking. The result is simple and the effect of light load is obvious.

[0012] In the above-mentioned one-way motor self-locking device, the end of the contact block is a T-shaped block.

[0013] The T-shaped contact block can contact and abut on the notch after rotation, increase the friction force, and enable the brake ring to be limited at the notch.

[0014] In the above-mentioned one-way motor self-locking device, the brake ring also has a convex edge, and the mounting portion also has a ring-shaped groove that communicates with the notch, and the convex edge abuts on the ring-shaped groove.

[0015] The convex edge and the ring-shaped groove can limit the brake ring, so that the brake ring is limited and fixed at the mounting portion, and will not be separated due to the rotation of the transmission shaft, thereby playing a limiting role.

[0016] In the above-mentioned one-way motor self-locking device, the depth of the notch is 3.8mm

[0017] In the above-mentioned one-way motor self-locking device, the rotation angle of the brake ring is 118°

[0018] In the above-mentioned one-way motor self-locking device, the opening size of the brake ring is 0.68mm

[0019] In the above-mentioned one-way motor self-locking device, the mounting portion is also provided with a bearing seat.

[0020] The mounting portion of the gear box is also provided with a bearing seat, which is convenient for installing the bearing. The outer ring of the bearing is connected to the gear box, and the inner ring is connected to the transmission shaft, thereby increasing the stability of the transmission shaft.

[0021] In the above-mentioned one-way motor self-locking device, the brake ring, the contact block and the convex edge are integrally formed.

[0022] The integrally formed brake ring has high strength, is firm and durable, and is not easy to wear.

[0023] Compared with the prior art, the one-way motor self-locking device adopts a brake ring arranged at the gear box and the transmission shaft for limiting the transmission shaft, and the brake ring is driven to rotate through forward and reverse rotation of the motor, that is, when the brake ring contacts the trapezoidal notch at the gear box mounting portion in the forward rotation, the force of the transmission shaft rotating to the left is opposite to the force of the brake ring, so that the brake ring loosens the transmission shaft and is in a relaxed state, and when the brake ring contacts the right side of the trapezoidal notch at the gear box mounting portion in the reverse rotation, the force of the transmission shaft is to the right, so that the brake ring tightly holds the transmission shaft, and the effect of self-locking brake is achieved. Such a structure uses smaller friction to increase the resistance of the motor rotating shaft, has the effect of self-locking brake, the result is simple, the effect is obvious under light load, and after the electric lifting table with load is stopped, the brake ring can effectively prevent the electric lifting table from sliding down, and the electric lifting table with load can also effectively prevent the electric lifting table from sliding down after being used for a period of time, so that the use effect is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a sectional view of the one-way motor self-locking device.

[0025] Figure 2 is a structure schematic view of the brake ring connected at the gear box in the one-way motor self-locking device.

[0026] Figure 3 is a structure schematic view of the mounting portion at the gear box in the one-way motor self-locking device.

[0027] Figure 4 is a structure schematic view of the brake ring in the one-way motor self-locking device. DETAILED DESCRIPTION

[0028] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the one-way motor self-locking device comprises a motor body 1 and a gear box 2 connected to the motor body 1, a transmission shaft 3 arranged in the motor body 1, and a worm gear 4 arranged in the gear box 2. One end of the transmission shaft 3 is engaged with the worm gear 4, and the other end is located in the motor body 1. A brake ring 6 capable of limiting is further connected to the transmission shaft 3. An installation portion 5 for installing the brake ring 6 is arranged on the gear box 2, and the brake ring 6 can loosen or tightly hold the transmission shaft 3.

[0029] The brake ring 6 is annular and open, and the opening further has an outwardly extending contact block 7. A notch 10 is arranged at the installation portion 5, and the contact block 7 is located at the notch 10.

[0030] The end portion of the contact block 7 is a T-shaped block 8.

[0031] The brake ring 6 also has a protrusion 9, and the mounting portion 5 is also provided with an annular groove 11, and the annular groove 11 is communicated with the notch 10, and the protrusion 9 abuts against the annular groove 11.

[0032] The depth of the notch 10 is 3.8mm

[0033] The rotation angle of the brake ring 6 is 118°

[0034] The opening size of the brake ring 6 is 0.68mm

[0035] The mounting portion 5 is also provided with a bearing seat 12.

[0036] The brake ring 6, the contact block 7 and the protrusion 9 are integrally formed.

[0037] The gear box 2 is connected at the end of the motor body 1 by bolts, the transmission shaft 3 penetrates into the gear box 2, one end of the transmission shaft 3 is connected with the inside of the motor body 1, and the other end is connected with the worm gear 4 in the gear box 2, so that the motor can drive the transmission shaft 3 to rotate and drive the worm gear 4 to rotate.

[0038] The gear box 2 is also provided with a mounting portion 5 for the brake ring 6, and the mounting portion 5 is also provided with a notch 10 for the contact block 7 at the end of the brake ring 6, and the mounting portion 5 is also provided with an annular groove 11 for the protrusion 9 to abut against, and the notch 10 is communicated with the annular groove 11, the brake ring 6 is sleeved on the transmission shaft 3, the T-shaped block 8 at the end of the brake ring 6 is located in the notch 10, and the protrusion 9 on the brake ring 6 abuts against the annular groove 11 on the gear box 2.

[0039] The transmission shaft 3 can drive the brake ring 6 to rotate, so that the brake ring 6 can loosen or tightly hold the transmission shaft 3.

[0040] When the motor rotates forward, that is, drives the transmission shaft 3 to rotate forward, the brake ring 6 contacts the trapezoidal notch 10 at the mounting portion 5 of the gear box 2, and the force of the transmission shaft 3 rotating to the left is opposite to the force of the brake ring 6, so that the brake ring 6 loosens the transmission shaft 3 and is in a relaxed state.

[0041] When the motor reverses, that is, drives the transmission shaft 3 to reverse, the brake ring 6 contacts the right side of the trapezoidal notch 10 at the mounting portion 5 of the gear box 2, and the force of the transmission shaft 3 is to the right, so that the brake ring 6 tightly holds the transmission shaft 3, and has the effect of self-locking brake.

[0042] The structure uses small friction to increase resistance of the motor rotating shaft, plays a brake self-locking effect, the result is simple, the light load effect is obvious, after the electric lifting table with load is stopped, can effectively avoid the slide under the action of the brake ring, also effectively avoids the slide after a period of use due to the electric lifting table with load for a long time, greatly improves the use effect.

[0043] All the technical features in the embodiment can be freely combined according to actual needs.

[0044] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of the present application.

Claims

1. A unidirectional motor self-locking device, comprising a motor body and a gearbox connected to the motor body, wherein a drive shaft is provided inside the motor body and a worm gear is provided inside the gearbox, characterized in that, One end of the drive shaft meshes with a worm gear, and the other end is located inside the motor body. A brake ring capable of limiting movement is also connected to the drive shaft. The gearbox has a mounting part for mounting the brake ring. The brake ring can be released or tightened on the drive shaft. The brake ring is annularly open, and the opening also has an outwardly extending contact block. A notch is provided at the mounting part, and the contact block is located at the notch. The end of the contact block is a T-shaped block. The brake ring also has a raised edge. An annular groove is provided at the mounting part, and the annular groove is connected to the notch. The raised edge abuts against the annular groove.

2. The unidirectional motor self-locking device according to claim 1, characterized in that, The depth of the notch is 3.8 mm.

3. The unidirectional motor self-locking device according to claim 1, characterized in that, The brake ring rotates at an angle of 118°.

4. A unidirectional motor self-locking device according to claim 1, characterized in that, The brake ring opening size is 0.68mm.

5. A unidirectional motor self-locking device according to claim 1, characterized in that, The brake ring, contact block, and flange are integrally formed.

6. A unidirectional motor self-locking device according to claim 1, characterized in that, A bearing housing is also provided at the mounting section.

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