Inner wall friction rotation non-return device

Abstract

The utility model discloses an inner wall friction rotation non-return device which comprises an upper cover, a lower cover and an annular sleeve body, a first bearing is arranged on the inner circumference of the upper cover, a second bearing is arranged on the inner circumference of the lower cover, a one-way bearing is arranged between the first bearing and the second bearing, and a non-return sleeve is fixed on the outer circumference of the one-way bearing. A third bearing is arranged between the upper part of the non-return sleeve and the lower part of the upper cover; a fourth bearing is arranged between the lower part of the non-return sleeve and the upper part of the lower cover; mounting holes are uniformly formed in the outer circumference of the non-return sleeve at intervals, supporting sleeves and friction blocks are arranged in the mounting holes, the supporting sleeves are provided with sleeves, supporting rings are formed on the outer sides of the sleeves, compression springs sleeve the sleeves, and under the elastic force action of the compression springs, the supporting sleeves can tightly abut against the friction blocks on the inner wall of the annular sleeve body. After the mechanical lifting rod is applied, the noise is low when the mechanical lifting rod descends, and the operation is relatively stable.

Description

Technical Field

[0001] The utility model relates to a device which can reduce the noise generated when a mechanical lifting rod is withdrawn, in particular to an inner wall friction rotation check device. Background Art

[0002] The mechanical lifting rod in the prior art is used for lifting antennas. The top rod of the lifting rod is equipped with a pan platform, and the pan platform is equipped with an antenna device. The weight of the pan platform and the antenna is relatively large. The lifting action of the mechanical lifting rod is driven by a reduction motor. The output shaft of the reduction motor is equipped with a driving gear. The bottom end of the lead screw of the mechanical lifting rod is equipped with a driven gear, and the driving gear is meshed with the driven gear. When the mechanical lifting rod rises, the lead screw can be driven to rotate by the reduction motor. The rotation of the lead screw can drive multiple lifting rods to rise in sequence. When the lifting rod rises, it usually runs smoothly and has less noise. The reduction motor rotates in the opposite direction to drive the mechanical lifting rod to descend. Since the weight of the pan platform and the antenna is large, the load of the lifting rod is also large, and the inertia of the lifting rod when descending is also large, which makes the lead screw always have a tendency to accelerate during the rotation process. Since the speed of the reduction motor is constant, this will cause intermittent collisions between the driven gear at the bottom of the lead screw and the driving gear on the output shaft of the reduction motor, resulting in large noise and the lifting rod not running smoothly when descending. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an inner wall friction rotation check device. After the mechanical lifting rod is applied with the utility model, the noise is small when descending and the operation is relatively stable.

[0004] In order to solve the above technical problems, the inner wall friction rotation check device of the utility model comprises an annular upper cover, a lower cover and an annular sleeve body fixed between the upper and lower covers, a first bearing is installed on the inner circumference of the upper cover, a second bearing is installed on the inner circumference of the lower cover, a one-way bearing shaft is arranged between the first and second bearings, an annular check sleeve is fixed on the outer circumference of the one-way bearing shaft, a third bearing is installed between the upper outer side of the check sleeve and the lower inner side of the upper cover, and a fourth bearing is installed between the lower outer side of the check sleeve and the upper inner side of the lower cover. Bearing; mounting holes are evenly spaced along the outer circumference of the check sleeve, the axes of the mounting holes are perpendicular to the axis of the check sleeve, and a cylindrical support sleeve and a friction block are sequentially arranged in the mounting hole from the inside to the outside, the support sleeve has a sleeve, a support ring is formed on the outside of the sleeve, the diameter of the support ring is larger than the outer diameter of the sleeve, the diameter of the support ring is equal to the diameter of the friction block, and a compression spring is arranged outside the sleeve, and under the elastic force of the compression spring, the support sleeve can press the friction block tightly against the inner wall of the annular sleeve body.

[0005] As an improvement of the present utility model, adjustment washers are respectively arranged between the inner ring of the one-way bearing shaft and the inner rings of the first and second bearings.

[0006] As a further improvement of the utility model, the inner circumference of the check sleeve and the outer ring of the one-way bearing shaft are connected and fixed by a T-key, the bottom of the T-key is pressed onto the bottom wall of the check sleeve by a pressure plate, and the pressure plate is fixed to the check sleeve by screws.

[0007] The utility model has the following effective technical effects: the utility model is installed on the bare rod section at the lower part of the lead screw of a mechanical lifting rod, which can effectively reduce the noise generated when the mechanical lifting rod is lowered, making the lifting rod more stable when it descends; after the adjustment washer is arranged in the utility model, it is convenient for the installation of the check sleeve; in the utility model, the inner circumference of the check sleeve and the outer ring of the one-way bearing shaft are connected and fixed by a T-key, and the fixing method is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0009] Figure 1 The utility model is an assembly schematic diagram when the inner wall friction rotation check device is installed at the bottom of the screw.

[0010] Figure 2 It is a schematic cross-sectional structural diagram of the support sleeve in the utility model. DETAILED DESCRIPTION

[0011] See also Figure 1 , Figure 2 The inner wall friction rotation check device of the utility model comprises an annular upper cover 1, a lower cover 2 and an annular sleeve body 3 fixed between the upper and lower covers, a first bearing 4 is mounted on the inner circumference of the upper cover, a second bearing 5 is mounted on the inner circumference of the lower cover, a one-way bearing shaft 6 is arranged between the first and second bearings, an annular check sleeve 7 is fixed on the outer circumference of the one-way bearing shaft, a third bearing 8 is mounted between the upper outer side of the check sleeve and the lower inner side of the upper cover, a fourth bearing 9 is mounted between the lower outer side of the check sleeve and the upper inner side of the lower cover; along the outer circumference of the check sleeve Mounting holes 10 are evenly spaced on the circumference, and the axis of the mounting holes is perpendicular to the axis of the check sleeve. A cylindrical support sleeve 11 and a friction block 12 are arranged in sequence from the inside to the outside of the mounting hole. The support sleeve has a sleeve 110, and a support ring 111 is formed on the outside of the sleeve. The diameter of the support ring is larger than the outer diameter of the sleeve, and the diameter of the support ring is equal to the diameter of the friction block. A compression spring 13 is arranged outside the sleeve 110. Under the elastic force of the compression spring, the support sleeve can press the friction block against the inner wall of the annular sleeve body 3. Adjustment washers 14 are respectively arranged between the inner ring of the one-way bearing shaft 6 and the inner rings of the first and second bearings 4 and 5. The inner circumference of the check sleeve 7 is connected and fixed to the outer ring of the one-way bearing shaft 6 through a T-key 15. The bottom of the T-key is pressed on the bottom wall of the check sleeve through a pressure plate 16, and the pressure plate is fixed to the check sleeve through a screw 17.

[0012] See again Figure 1 When in use, the inner wall friction rotation check device of the utility model is installed on the bare rod section at the lower part of the lead screw 100 in the mechanical lifting rod, the first bearing 4, the second bearing 5 and the one-way bearing shaft 6 are fixed on the bare rod section at the lower part of the lead screw, and an adjustment washer 14 is respectively arranged between the inner ring of the one-way bearing shaft and the inner rings of the first and second bearings. When the lead screw rotates counterclockwise, it can drive multiple lifting rods to rise in sequence. Due to the one-way rotation characteristic of the one-way bearing, the lead screw rotates with the inner ring of the one-way bearing, the outer ring of the one-way bearing does not move, the friction block and the check sleeve are in a static state, and no friction force is generated. When the lead screw rotates clockwise, it can drive multiple lifting rods to descend in sequence. The one-way bearing is in a locked state. The lead screw and the one-way bearing drive the check sleeve to rotate together. The friction block and the check sleeve are in a relative rotation state. The friction block is pressed against the inner wall of the annular sleeve 3 under the elastic force of the compression spring, thereby generating a reverse friction torque. When the lead screw rotates clockwise, it needs to overcome the reverse torque generated between the friction block and the annular sleeve 3 before it can rotate normally. This can effectively hinder the acceleration trend in the process of the lead screw rotation, and further prevent the intermittent collision between the driven gear at the bottom of the lead screw and the driving gear on the output shaft of the reduction motor. This can effectively reduce the noise when the mechanical lifting rod descends, and make the mechanical lifting rod land more smoothly when it is withdrawn. Adjusting the installation direction of the one-way bearing can adjust the direction of friction, that is, friction can be generated in both clockwise and counterclockwise directions. The magnitude of the friction can be adjusted by increasing or decreasing the number of friction blocks and selecting compression springs with corresponding characteristics.

[0013] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the embodiments of the utility model. Any modification or equivalent replacement of the utility model to achieve the same technical effect is within the protection scope of the utility model.

Claims

1. An inner wall friction rotation check device, characterized in that: The invention comprises an annular upper cover (1), a lower cover (2) and an annular sleeve body (3) fixed between the upper and lower covers, a first bearing (4) being mounted on the inner circumference of the upper cover, a second bearing (5) being mounted on the inner circumference of the lower cover, a one-way bearing shaft (6) being arranged between the first and second bearings, an annular backstop sleeve (7) being fixed on the outer circumference of the one-way bearing shaft, a third bearing (8) being mounted between the upper outer side of the backstop sleeve and the lower inner side of the upper cover, and a fourth bearing (9) being mounted between the lower outer side of the backstop sleeve and the upper inner side of the lower cover; and bearings are evenly spaced along the outer circumference of the backstop sleeve. A mounting hole (10) is provided, the axis of the mounting hole being perpendicular to the axis of the check sleeve, a cylindrical support sleeve (11) and a friction block (12) are arranged in sequence from the inside to the outside of the mounting hole, the support sleeve having a sleeve (110), a support ring (111) being formed on the outside of the sleeve, the diameter of the support ring being larger than the outer diameter of the sleeve, the diameter of the support ring being equal to the diameter of the friction block, a compression spring (13) being arranged on the outer sleeve of the sleeve (110), and under the elastic force of the compression spring, the support sleeve can press the friction block against the inner wall of the annular sleeve body (3).

2. The inner wall friction rotation check device according to claim 1, characterized in that: Adjustment washers (14) are respectively arranged between the inner ring of the one-way bearing shaft (6) and the inner rings of the first and second bearings (4, 5).

3. The inner wall friction rotation check device according to claim 1, characterized in that: The inner circumference of the check sleeve (7) and the outer ring of the one-way bearing shaft (6) are connected and fixed via a T-shaped key (15), the bottom of the T-shaped key is pressed onto the bottom wall of the check sleeve via a pressure plate (16), and the pressure plate is fixed to the check sleeve via a screw (17).

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