Plane friction non-return device

Abstract

The utility model discloses a plane friction non-return device which is provided with a bearing, a lower friction disc is fixed in an inner hole of an inner ring of the bearing, an inner ring is fixed on the outer wall of an outer ring of the bearing, a plurality of counter bores are evenly formed in the circumference of the lower end face of the inner ring at intervals, first compression springs are arranged in the counter bores, and an upper friction disc is embedded in the lower portions of the counter bores. A round hole is formed in the top of the upper friction disc, the lower portion of the first compression spring extends into the round hole of the upper friction disc, the wedge-caulking device further comprises a plurality of counterclockwise wedge-caulking mechanisms evenly distributed on the outer side of the inner ring, and each wedge-caulking mechanism comprises a pin roller, a guide column and a second compression spring. The roller is arranged in a rolling groove which is formed along the outer wall of the annular inner ring and provided with an approximately triangular section, a guide hole is further formed in the inner ring, a second compression spring and a guide column are arranged in the guide hole, and the guide column can abut against the side face of the roller under the elastic force effect of the second compression spring. 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[0001] The utility model relates to a device which can reduce the noise generated when a mechanical lifting rod is withdrawn, in particular to a plane friction check device.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 a plane friction check device. After the mechanical lifting rod is applied with the utility model, the noise is small when it descends and the operation is relatively stable.

[0004] In order to solve the above technical problems, the utility model provides a planar friction check device, which is characterized by comprising a bearing, wherein the bearing comprises a bearing inner ring and a bearing outer ring, an annular lower friction disk is fixed to the inner hole of the bearing inner ring, an annular inner ring is fixed to the outer wall of the bearing outer ring, a gap is provided between the lower end surface of the inner ring and the upper end surface of the lower friction disk, a plurality of countersunk holes are evenly spaced along the circumference of the lower end surface of the inner ring, a first compression spring is provided in each countersunk hole, an upper friction disk is embedded in the lower part of each countersunk hole, a circular hole is provided at the top of the upper friction disk, the lower part of the first compression spring extends into the circular hole of the upper friction disk, and under the elastic force of the first compression spring, the bottom of the upper friction disk can be pressed tightly against the upper end of the lower friction disk. The surface is provided with mounting holes at intervals along the outer circumference of the lower friction disk; it also includes a plurality of counterclockwise wedging mechanisms evenly distributed on the outer side of the annular inner ring, each wedging mechanism includes a roller, a guide column and a second compression spring, the roller is installed in a rolling groove with a cross-section approximately triangular and opened along the outer wall of the annular inner ring, the rolling groove is located between the upper and lower end faces of the annular inner ring, the diameter of the roller is slightly larger than the side size of the groove end of the rolling groove, and a guide hole communicating with the groove end side of the rolling groove is also provided inside the annular inner ring, the guide hole is equipped with the second compression spring and the guide column, and under the elastic force of the second compression spring, the guide column can be pressed against the side of the roller.

[0005] Furthermore, the number of the counterclockwise wedging mechanisms is 4.

[0006] As an improvement of the present invention, a friction plate that can form a friction fit with the upper friction plate is embedded in the upper end surface of the annular lower friction plate at a position corresponding to the upper friction plate. The upper end surface of the friction plate is located above the upper end surface of the lower friction plate. Under the elastic force of the first compression spring, the bottom of the upper friction plate can be pressed tightly against the friction plate embedded in the lower friction plate.

[0007] As a further improvement of the utility model, the inner ring of the bearing is covered with an inner bearing cover in an annular shape, and the outer ring of the bearing is covered with an outer bearing cover in an annular shape. The inner bearing cover is fixedly connected to the lower friction plate at the inner hole of the inner ring of the bearing by an inner fastening screw, and the outer bearing cover is fixedly connected to the annular inner ring on the outer wall of the outer ring of the bearing by an outer fastening screw.

[0008] The utility model has the following effective technical effects: after the utility model is installed in the gear at the bottom of the screw of the mechanical lifting rod, the noise generated when the mechanical lifting rod is lowered can be effectively reduced, making the lifting rod more stable when lowering; after the friction plate is arranged in the utility model, it can be replaced separately when the friction plate is worn, which can extend the service life of the utility model; in the utility model, the lower friction plate and the inner ring are fixed by the inner and outer bearing covers, and the fixing method is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0010] Figure 1 The utility model is a schematic diagram of the planar friction check device in a top view.

[0011] Figure 2 is along Figure 1 Schematic diagram of the cross-sectional structure along line AA.

[0012] Figure 3 yes Figure 1 A magnified schematic diagram of the structure at position I.

[0013] Figure 4 The utility model is a top view of the structure when the flat friction check device is installed in the inner hole of the gear. In the figure, the lower friction plate and the mounting plate are fixed by screws.

[0014] Figure 5 is along Figure 1 Schematic diagram of the cross-sectional structure along line BB. DETAILED DESCRIPTION

[0015] See also Figure 1 - Figure 3The utility model of the plane friction check device comprises a bearing 1, wherein the bearing comprises a bearing inner ring 101 and a bearing outer ring 102, wherein a circular ring-shaped lower friction disk 2 is fixed to the inner hole of the bearing inner ring, and a circular ring-shaped inner ring 3 is fixed to the outer wall of the bearing outer ring, and a gap 4 is provided between the lower end surface of the inner ring and the upper end surface of the lower friction disk, and a plurality of countersunk holes 5 are evenly spaced along the circumference of the lower end surface of the inner ring, wherein a first compression spring 6 is installed in each countersunk hole, and an upper friction disk 7 is embedded in the lower part of each countersunk hole, and a circular hole 8 is provided on the top of the upper friction disk, and the lower part of the first compression spring extends into the circular hole of the upper friction disk, and under the elastic force of the first compression spring, the bottom of the upper friction disk can be pressed tightly against the upper end surface of the lower friction disk 2, and the lower friction disk is compressed along the lower friction disk. The outer circumference of the annular inner ring 3 is provided with mounting holes 9 at intervals; it also includes a plurality of counterclockwise wedging mechanisms evenly arranged on the outer side of the annular inner ring 3, each of which includes a roller 10, a guide post 11 and a second compression spring 12. The roller is installed in a rolling groove 13 with a cross section approximately triangular and opened along the outer wall of the annular inner ring. The rolling groove is located between the upper and lower end faces of the annular inner ring. The diameter of the roller 10 is slightly larger than the size of the groove end side 131 of the rolling groove. The inner part of the annular inner ring is also provided with a guide hole 14 communicating with the groove end side of the rolling groove. The second compression spring and guide post are installed in the guide hole. Under the elastic force of the second compression spring, the guide post can be pressed against the side of the roller. The number of the counterclockwise wedging mechanisms is 4. A friction plate 15 that can form a friction fit with the upper friction plate is also embedded in the upper end surface of the annular lower friction plate 2 at a position corresponding to the upper friction plate 7. The upper end surface of the friction plate is located above the upper end surface of the lower friction plate. Under the elastic force of the first compression spring 6, the bottom of the upper friction plate can be pressed against the friction plate 15 embedded on the lower friction plate 2. The inner ring 101 of the bearing is covered with an inner bearing cover 16 in an annular shape, and the outer ring 102 of the bearing is covered with an outer bearing cover 17 in an annular shape. The inner bearing cover is fixedly connected to the lower friction plate 2 at the inner hole of the inner ring of the bearing by an inner fastening screw 18, and the outer bearing cover is fixedly connected to the annular inner ring 3 on the outer wall of the outer ring of the bearing by an outer fastening screw 19.

[0016] The utility model can be used to reduce vibration and noise when the mechanical lifting rod is withdrawn, so that the mechanical lifting rod can be more stable when it descends. Figure 4 , Figure 5When in use, the plane friction check device of the utility model is installed into the inner hole of the driven gear 50 at the bottom of the lead screw 60 in the mechanical lifting rod, and the lower friction plate 2 is fixed to the mounting plate 51 by screws 52. At this time, the outer circle contour formed by the rollers 10 in the counterclockwise wedging mechanism uniformly arranged on the outer side of the annular inner ring 3 forms a clearance fit with the inner hole of the gear. When the gear rotates in the clockwise direction, the multiple rollers are loosened from the inner hole of the gear under the action of friction force. At this time, the gear and the plane friction check device of the utility model are clearance fit, and the reverse torque on the gear is very small; when the gear When the wheel rotates counterclockwise, multiple rollers are wedged with the inner hole of the gear under the action of friction. At this time, the gear can drive the inner ring 3 to rotate. Since the friction distance between the upper friction plate 7 and the lower friction plate 2 is transmitted to the inner ring through the upper friction plate, the gear 50 will be subjected to a reverse torque when rotating counterclockwise. The magnitude of the reverse torque can be adjusted by the number of counterclockwise wedging mechanisms and the characteristics of the first compression spring 6 in each counterclockwise wedging mechanism. By selecting a first compression spring with corresponding characteristics and setting a corresponding number of counterclockwise wedging mechanisms, the corresponding reverse torque can be obtained. The gearbox is driven by the gear of the motor to rotate in the clockwise direction, and the gearbox is driven by the gear of the motor to rotate in the counterclockwise direction, so that the gearbox can be driven to move upward and downward, thereby effectively reducing the noise when the lifting rod is lowered and making the lifting rod more stable.

[0017] 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. A plane friction check device, characterized in that: The invention relates to a bearing (1), wherein the bearing has a bearing inner ring (101) and a bearing outer ring (102), wherein an inner hole of the bearing inner ring is fixed with an annular lower friction disk (2), and an outer wall of the bearing outer ring is fixed with an annular inner ring (3), a gap (4) is provided between the lower end surface of the inner ring and the upper end surface of the lower friction disk, and a plurality of countersunk holes (5) are evenly spaced along the circumference of the lower end surface of the inner ring, each countersunk hole is provided with a first compression spring (6), an upper friction disk (7) is embedded at the lower part of each countersunk hole, a circular hole (8) is provided at the top of the upper friction disk, and the lower part of the first compression spring extends into the circular hole of the upper friction disk. Under the elastic force of the first compression spring, the bottom of the upper friction disk can be pressed tightly against the upper end surface of the lower friction disk (2), and a plurality of countersunk holes (5) are evenly spaced along the circumference of the lower end surface of the inner ring. The invention also includes mounting holes (9) evenly spaced at intervals; and a plurality of counterclockwise wedging mechanisms evenly spaced on the outside of the annular inner ring (3), each wedging mechanism including a roller (10), a guide post (11) and a second compression spring (12). The roller is mounted in a rolling groove (13) with a cross section approximately triangular and opened along the outer wall of the annular inner ring. The rolling groove is located between the upper and lower end faces of the annular inner ring. The diameter of the roller (10) is slightly larger than the size of the groove end side edge (131) of the rolling groove. The annular inner ring also includes a guide hole (14) in communication with the groove end side edge of the rolling groove. The second compression spring and the guide post are installed in the guide hole. Under the elastic force of the second compression spring, the guide post can be pressed against the side of the roller.

2. The plane friction check device according to claim 1, characterized in that: The number of the counterclockwise wedging mechanisms is 4.

3. The plane friction check device according to claim 1, characterized in that: A friction plate (15) capable of forming a friction fit with the upper friction plate is embedded in a position on the upper end surface of the annular lower friction plate (2) corresponding to the upper friction plate (7); the upper end surface of the friction plate is located above the upper end surface of the lower friction plate; under the elastic force of the first compression spring (6), the bottom of the upper friction plate can be pressed against the friction plate (15) embedded on the lower friction plate (2).

4. The plane friction check device according to claim 1, characterized in that: The bearing inner ring (101) is covered with an annular inner bearing cover (16), and the bearing outer ring (102) is covered with an annular outer bearing cover (17); the inner bearing cover is fixedly connected to the lower friction plate (2) at the inner hole of the bearing inner ring by an inner fastening screw (18), and the outer bearing cover is fixedly connected to the annular inner ring (3) on the outer wall of the bearing outer ring by an outer fastening screw (19).

Images