CN220163576U

CN220163576U - Wheel pretensioner

Info

Publication number: CN220163576U
Application number: CN202321033725.1U
Authority: CN
Inventors: 赵飞
Original assignee: Kunshan Jinaer Car Material Co ltd
Current assignee: Kunshan Jinaer Car Material Co ltd
Priority date: 2023-05-04
Filing date: 2023-05-04
Publication date: 2023-12-12
Anticipated expiration: 2033-05-04

Abstract

The utility model provides a wheel pretensioner, which is used for screwing spokes on a hub of a bicycle, and comprises a supporting platform, a hub rotating mechanism, a pushing mechanism and a screwing mechanism, wherein the hub rotating mechanism and the pushing mechanism are arranged on the supporting platform, the hub of the bicycle is detachably arranged on the hub rotating mechanism, the pushing mechanism is provided with an output end moving towards the peripheral surface of the hub, the screwing mechanism is arranged on the output end of the pushing mechanism, and the screwing mechanism is used for screwing the spokes on the hub. The hub rotating mechanism is used for driving the hub to correspondingly rotate, so that the position of the hub is convenient to adjust; the pushing mechanism is used for driving the screwing mechanism to linearly move, so that the screwing mechanism can screw spokes on the hub conveniently. This scheme can screw the spoke voluntarily, has saved the human cost of wheel hub production.

Description

Wheel pretensioner

Technical Field

The utility model relates to the field of bicycle production equipment, in particular to a wheel pretensioner.

Background

The wheel of the bicycle generally comprises a hub, spokes and a tire, wherein the spokes can improve the structural strength of the hub, so that the hub is uniformly stressed in the running process, and the hub deformation can be effectively avoided.

Traditional spoke is all rotatory screw up the spoke through manual, owing to have many spokes on every wheel, adopts artificial mode to tighten the spoke and is comparatively wasted time and energy, and machining efficiency is low. Because the spokes are relatively slender, there is no corresponding mechanical device in the prior art to mechanically tighten the spokes.

In summary, the technical problem that this scheme solved is: how to mechanically tighten the spokes.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a wheel pretensioner, wherein a wheel hub rotating mechanism is used for driving a wheel hub to correspondingly rotate, so that the position of the wheel hub is convenient to adjust; the pushing mechanism is used for driving the screwing mechanism to linearly move, so that the screwing mechanism can screw spokes on the hub conveniently. This scheme can screw the spoke voluntarily, has saved the human cost of wheel hub production.

The wheel pretensioner comprises a supporting platform, a wheel hub rotating mechanism, a pushing mechanism and a screwing mechanism, wherein the wheel hub rotating mechanism and the pushing mechanism are arranged on the supporting platform, the wheel hub of the bicycle is detachably arranged on the wheel hub rotating mechanism, the pushing mechanism is provided with an output end moving towards the peripheral surface of the wheel hub, the screwing mechanism is arranged on the output end of the pushing mechanism, and the screwing mechanism is used for screwing the spokes on the wheel hub.

Preferably, the hub rotating mechanism comprises a turntable and a driving assembly, the turntable is rotatably arranged in a mounting groove on the upper end face of the supporting platform, the driving assembly is arranged on the lower end face of the supporting platform and is provided with a rotatable output shaft, the output shaft of the driving assembly is used for driving the turntable to rotate, and a positioning hole for positioning a wheel shaft of a bicycle is formed in the upper end face of the turntable.

Preferably, the spoke comprises a steel bar and a threaded sleeve rotatably mounted in the hub mounting hole, one end of the steel bar facing the threaded sleeve is provided with a threaded section, and one end of the steel bar is screwed into a threaded hole of the threaded sleeve.

Preferably, a limit part is fixed at one end of the threaded sleeve, which is far away from the steel bar, and a polygonal hole is arranged at one end face of the limit part, which is opposite to the steel bar.

Preferably, the screwing mechanism comprises a first motor, an elastic telescopic part and a polygonal rotating column, the first motor is installed at the output end of the pushing mechanism, the elastic telescopic part is fixed on the output shaft of the first motor, the polygonal rotating column is fixed at one end, far away from the first motor, of the elastic telescopic part, and the polygonal rotating column is used for being inserted into the polygonal hole.

Preferably, the elastic expansion piece comprises a first column body, a second column body and a spring, wherein the first column body is fixed on an output shaft of the first motor, a chute is formed in the first column body, the spring is embedded into the chute, the second column body is slidably arranged in the chute, one end of the second column body is in pressure contact with the spring, and the other end of the second column body is fixed with the polygonal rotating column.

Preferably, the cross section of the sliding groove along the direction vertical to the length direction of the sliding groove is polygonal, and the cross section of the second column along the direction vertical to the length direction of the sliding groove is polygonal.

Preferably, the pushing mechanism comprises an air cylinder, a sliding block, a sliding rail and a mounting plate, wherein the mounting plate is fixed on the supporting platform, the cylinder body of the air cylinder is fixed on the mounting plate, and the piston rod of the air cylinder is arranged along the horizontal direction; the mounting plate is fixedly provided with a sliding rail, the sliding block is slidably arranged on the sliding rail, the first motor is fixed on the sliding block, and a piston rod of the air cylinder is used for driving the sliding block to linearly move.

The beneficial effects are that:

the utility model provides a wheel pretensioner, which is characterized in that a hub rotating mechanism is used for driving a hub to correspondingly rotate, so that the position of the hub is convenient to adjust; the pushing mechanism is used for driving the screwing mechanism to linearly move, so that the screwing mechanism can screw spokes on the hub conveniently. This scheme can screw the spoke voluntarily, has saved the human cost of wheel hub production.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic perspective view of a wheel pretensioner according to the present embodiment;

FIG. 2 is a schematic view of a partial enlarged structure at A in FIG. 1;

FIG. 3 is a schematic view of a partially enlarged structure at B in FIG. 1;

FIG. 4 is an axial cross-sectional view of the elastic telescoping member and polygonal rotating post in this embodiment;

FIG. 5 is a schematic perspective view of the driving assembly in the present embodiment;

fig. 6 is a schematic perspective view of the turntable in the present embodiment.

Wherein reference numerals are as follows:

11-a hub; 12-a support platform; 13-a hub rotation mechanism; 14-a pushing mechanism; 15-a screwing mechanism; 16-a turntable; 17-positioning holes; 18-steel bar; 19-a threaded sleeve; 20-limiting parts; 21-polygonal holes; 22-a first motor; 23-elastic telescoping member; 24-polygonal rotating columns; 25-a first column; 26-a second column; 27-a spring; 28-sliding grooves; 29-cylinder; 30-sliding blocks; 31-sliding rails; 32-mounting plates; 33-a second motor; 34-speed reducer.

Detailed Description

The utility model is described in further detail below with reference to the accompanying drawings.

As shown in fig. 1 to 6, the present embodiment provides a wheel pretensioner for tightening spokes on a hub 11 of a bicycle, which includes a support platform 12, a hub rotation mechanism 13, a pushing mechanism 14 and a tightening mechanism 15, wherein the hub rotation mechanism 13 and the pushing mechanism 14 are mounted on the support platform 12, the hub 11 of the bicycle is detachably mounted on the hub rotation mechanism 13, the pushing mechanism 14 has an output end moving towards the circumferential surface of the hub 11, the tightening mechanism 15 is mounted on the output end of the pushing mechanism 14, and the tightening mechanism 15 is used for tightening spokes on the hub 11.

The technical effect of this scheme lies in: the hub rotating mechanism 13 is used for driving the hub 11 to correspondingly rotate, so that the position of the hub 11 is convenient to adjust; the pushing mechanism 14 is used for driving the screwing mechanism 15 to linearly move, so that the screwing mechanism 15 can screw the spokes on the hub 11 conveniently. This scheme can screw the spoke voluntarily, has saved the human cost of hub 11 production.

As an implementation manner of this embodiment, the hub rotation mechanism 13 includes a turntable 16 and a driving assembly, the turntable 16 is rotatably mounted in a mounting groove on an upper end surface of the support platform 12, the driving assembly is mounted on a lower end surface of the support platform 12, and the driving assembly has a rotatable output shaft, the output shaft of the driving assembly is used for driving the turntable 16 to rotate, and a positioning hole 17 for positioning a wheel shaft of the bicycle is provided on the upper end surface of the turntable 16.

The driving assembly comprises a second motor 33 and a speed reducer 34, the second motor 33 is used for driving the speed reducer 34 to work, an output shaft on the speed reducer 34 is used for driving the turntable 16 to rotate, and the second motor 33 and the speed reducer 34 are respectively fixed on the lower end face of the supporting platform 12. The rotation speed of the turntable 16 can be slowed down, and the rotation torque provided for the turntable 16 is increased, so that the rotation of the turntable 16 is more stable.

As an implementation of this embodiment, the spoke comprises a steel bar 18 and a threaded sleeve 19, the threaded sleeve 19 being rotatably mounted in the hub 11 mounting hole, the end of the steel bar 18 facing the threaded sleeve 19 being provided with a threaded section, and the end of the steel bar 18 being screwed into a threaded hole in the threaded sleeve 19. The structure of the spoke belongs to the prior art, and the content of the spoke is not described in detail.

As an implementation manner of this embodiment, a limiting portion 20 is fixed to an end of the threaded sleeve 19 away from the steel bar 18, and a polygonal hole 21 is formed in an end surface of the limiting portion 20 facing away from the steel bar 18.

Further, the screwing mechanism 15 includes a first motor 22, an elastic telescopic member 23 and a polygonal rotating column 24, the first motor 22 is mounted on the output end of the pushing mechanism 14, the elastic telescopic member 23 is fixed on the output shaft of the first motor 22, the polygonal rotating column 24 is fixed on one end of the elastic telescopic member 23 far away from the first motor 22, and the polygonal rotating column 24 is used for being inserted into the polygonal hole 21.

The polygonal rotation post 24 in this solution rotates the threaded sleeve 19 through the polygonal hole 21, so that tightening between the threaded sleeve 19 and the steel bar 18 takes place.

As an implementation manner of this embodiment, the elastic expansion member 23 includes a first cylinder 25, a second cylinder 26 and a spring 27, the first cylinder 25 is fixed on the output shaft of the first motor 22, a chute 28 is provided on the first cylinder 25, the spring 27 is embedded in the chute 28, the second cylinder 26 is slidably provided in the chute 28, one end of the second cylinder 26 is in pressure contact with the spring 27, and the polygonal rotating cylinder 24 is fixed on the other end of the second cylinder 26.

Further, the cross-sectional shape of the chute 28 along the direction perpendicular to the longitudinal direction thereof is polygonal, and the cross-sectional shape of the second column 26 along the direction perpendicular to the longitudinal direction thereof is polygonal. The present solution is used to place the second cylinder 26 in rotation in the chute 28.

As one implementation of the present embodiment, the pushing mechanism 14 includes an air cylinder 29, a slider 30, a slide rail 31, and a mounting plate 32, the mounting plate 32 is fixed on the support platform 12, the cylinder body of the air cylinder 29 is fixed on the mounting plate 32, and the piston rod of the air cylinder 29 is arranged in the horizontal direction; the mounting plate 32 is fixed with a slide rail 31, the slide block 30 is slidably mounted on the slide rail 31, the first motor 22 is fixed on the slide block 30, and a piston rod of the air cylinder 29 is used for driving the slide block 30 to linearly move.

In this scheme, the cylinder 29 stretches and contracts to drive the slider 30 to move linearly, and the position of the screwing mechanism 15 is adjusted by the movement of the slider 30.

Working principle:

of the spokes on the hub 11 of the bicycle, the positions of the threaded sleeves 19 on four spokes next to each other are offset, the four spokes being a set of spokes, and the bicycle having a plurality of sets of spokes arranged periodically, this part of the description of the prior art.

In order to effectively screw the threaded sleeve 19 on each spoke, four pushing mechanisms 14 and screwing mechanisms 15 are arranged, the working principle of each pushing mechanism 14 and screwing mechanism 15 is the same, and for convenience of explanation, only the working process of one pushing mechanism 14 and one screwing mechanism 15 is described below.

After the person manually installs the spoke on the hub 11, the threaded sleeve 19 on the spoke is not tightened and the spoke is in a relaxed state. Then, the hub 11 is mounted in the positioning hole 17 of the turntable 16, wherein the positioning hole 17 is in a regular hexagon shape and is attached to a nut on a wheel shaft, and the hub 11 can be effectively prevented from rotating.

The control system automatically controls the cylinder 29 to move, at this time, the sliding block 30 drives the first motor 22, the elastic telescopic piece 23 and the polygonal rotating column 24 to move towards the hub 11 under the action of the cylinder 29, and when the polygonal rotating column 24 is inserted into the polygonal hole 21 on the threaded sleeve 19, the first motor 22 starts to work and screws the threaded sleeve 19 through the polygonal rotating column 24. Then the control system controls the cylinder 29 to reset, and after the hub rotation mechanism 13 drives the hub 11 to rotate a certain angle, the control system continues to control the cylinder 29 and the first motor 22 to screw the threaded sleeve 19.

It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.

Claims

1. The utility model provides a wheel pretensioner for screw spoke on wheel hub (11) of bicycle, a serial communication port, including supporting platform (12), wheel hub rotary mechanism (13), push mechanism (14) and screw mechanism (15), install on supporting platform (12) wheel hub rotary mechanism (13) with push mechanism (14), wheel hub rotary mechanism (13) detachably installs wheel hub (11) of bicycle, push mechanism (14) are last to have one orientation wheel hub (11) peripheral face motion's output, screw mechanism (15) are installed on the output of push mechanism (14), just screw mechanism (15) are used for screwing the spoke on wheel hub (11).

2. Wheel pretensioner according to claim 1, characterized in that the hub rotation mechanism (13) comprises a turntable (16) and a driving assembly, the turntable (16) is rotatably mounted in a mounting groove of the upper end surface of the support platform (12), the driving assembly is mounted on the lower end surface of the support platform (12), and the driving assembly has a rotatable output shaft, the output shaft of the driving assembly is used for driving the turntable (16) to rotate, and the upper end surface of the turntable (16) is provided with a positioning hole (17) for positioning the wheel axle of the bicycle.

3. Wheel pretensioner according to claim 2, wherein the spokes comprise a steel bar (18) and a threaded sleeve (19), the threaded sleeve (19) being rotatably mounted in the hub (11) mounting hole, the steel bar (18) being provided with a threaded section towards one end of the threaded sleeve (19), and one end of the steel bar (18) being arranged in a threaded hole of the threaded sleeve (19) in a screwed manner.

4. A wheel pretensioner according to claim 3, characterized in that the end of the threaded sleeve (19) remote from the bar (18) is fixed with a limit part (20), and that an end surface of the limit part (20) facing away from the bar (18) is provided with a polygonal hole (21).

5. The wheel pretensioner according to claim 4, wherein the tightening mechanism (15) includes a first motor (22), an elastic telescopic member (23) and a polygonal rotating post (24), the first motor (22) is mounted on an output end of the pushing mechanism (14), the elastic telescopic member (23) is fixed on an output shaft of the first motor (22), the polygonal rotating post (24) is fixed at an end of the elastic telescopic member (23) away from the first motor (22), and the polygonal rotating post (24) is used for being inserted into the polygonal hole (21).

6. The wheel pretensioner according to claim 5, wherein the elastic expansion member (23) includes a first cylinder (25), a second cylinder (26) and a spring (27), the first cylinder (25) is fixed on an output shaft of the first motor (22), a chute (28) is provided on the first cylinder (25), the spring (27) is embedded into the chute (28), the second cylinder (26) is slidably provided in the chute (28), one end of the second cylinder (26) is in pressure contact with the spring (27), and the other end of the second cylinder (26) is fixed with the polygonal rotating column (24).

7. The wheel pretensioner according to claim 6, wherein the chute (28) has a polygonal cross-sectional shape perpendicular to the longitudinal direction thereof, and the second cylinder (26) has a polygonal cross-sectional shape perpendicular to the longitudinal direction thereof.

8. The wheel pretensioner according to claim 5, wherein the pushing mechanism (14) includes a cylinder (29), a slider (30), a slide rail (31), and a mounting plate (32), the mounting plate (32) is fixed on the support platform (12), a cylinder body of the cylinder (29) is fixed on the mounting plate (32), and a piston rod of the cylinder (29) is arranged in a horizontal direction; the mounting plate (32) is fixedly provided with a sliding rail (31), the sliding block (30) is slidably arranged on the sliding rail (31), the first motor (22) is fixed on the sliding block (30), and a piston rod of the air cylinder (29) is used for driving the sliding block (30) to linearly move.