CN210440475U

CN210440475U - Stepless reducing coupling

Info

Publication number: CN210440475U
Application number: CN201920898188.4U
Authority: CN
Inventors: 邓垚; 杜妍睿
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-05-01
Anticipated expiration: 2029-06-14

Abstract

The utility model relates to a stepless reducing coupling, which comprises a coupling main body, and a bevel gear part and a clamping part which are arranged at the two ends of the coupling main body; the bevel gear component comprises a driving bevel gear and a driven bevel gear, and a spiral track is arranged on one side of the driven bevel gear; the clamping component comprises a plurality of clamping jaws arranged on the spiral track and can move along the radial direction of the coupler body, and a spiral toothed plate matched with the spiral track is arranged on the contact surface of the clamping jaws and the spiral track; when the driving bevel gear rotates in a single direction, the driven bevel gear is driven to rotate, so that the distance between the clamping jaws and the center of the spiral track is increased or decreased, and shaft rods with different shaft diameters are clamped. Compared with the prior art, the utility model adopts the bevel gear and the spiral wire coil to complete the clamping of the shaft, and the spiral wire can be reversely self-locked, so that the clamping is more stable; the method can be perfectly applied to the scene of shaft connection on the premise that the machining size is not standard and the specific size is not measured.

Description

Stepless reducing coupling

Technical Field

The utility model relates to a shaft coupling especially relates to a stepless reducing shaft coupling.

Background

The coupling is also called coupling, and is used for firmly coupling a driving shaft and a driven shaft in different mechanisms to rotate together and transmitting mechanical components of movement and torque. Sometimes also to couple the shaft with other parts (e.g. gears, pulleys, etc.). Most of the current couplings are standardized and mainly divided into rigid couplings and flexible couplings.

The aperture of the existing coupler needs to be matched with the diameter of a connected shaft, and couplers with different apertures need to be selected for connection even though the shafts with close diameters are connected. When the shaft is not precisely dimensioned, it may cause difficulties in matching the shaft to the coupling. Therefore, it is urgently needed to design a coupling capable of realizing stepless diameter change of a coupling hole and adapting to the connection matching requirements of different shafts.

CN205244172U provides a variable-diameter one-way transmission coupling for vibratory roller, which includes two connecting sleeves and a connecting outer tube, the two connecting sleeves have the same outer diameter and different inner diameters, and one end surface of the connecting sleeve with small inner diameter is provided with a ratchet wheel, the inner surface of one end of the connecting sleeve with large inner diameter is provided with a pawl, the ratchet wheel extends into the connecting sleeve with large inner diameter and is matched with the pawl, so that the connecting sleeve with small inner diameter can only perform one-way transmission relative to the connecting sleeve with large inner diameter; the connecting outer pipe is sleeved on the outer surfaces of the two connecting sleeve pipes, and the contact surfaces of the two connecting sleeve pipes and the connecting outer pipe rotate relatively; the technical scheme can not be applied to the scene of shaft connection on the premise that the machining size is not standard and the specific size is not measured, and the practicability is poor.

SUMMERY OF THE UTILITY MODEL

The present invention aims to overcome the above-mentioned drawbacks of the prior art and to provide a stepless variable diameter coupling.

The purpose of the utility model can be realized through the following technical scheme:

a stepless reducing coupling comprises a coupling main body, and bevel gear components and clamping components which are arranged at two ends of the coupling main body;

the bevel gear component comprises a driving bevel gear and a driven bevel gear, one side of the driven bevel gear is a gear surface meshed with the gear on the driving bevel gear, and the other side of the driven bevel gear is provided with a spiral track;

the clamping component comprises a plurality of clamping jaws arranged on the spiral track, the clamping jaws are arranged at one end of the coupler main body and can move along the radial direction of the coupler main body, a clamping part with a concave arc surface is arranged at one end, facing the center of the spiral track, of each clamping jaw, and a spiral toothed plate matched with the spiral track is arranged on the contact surface of each clamping jaw and the spiral track;

when the driving bevel gear rotates in a single direction, the driven bevel gear is driven to rotate, the spiral tooth plates slide relative to the spiral tracks, the distance between the clamping jaws and the centers of the spiral tracks is increased or decreased, and shaft rods with different shaft diameters are clamped.

Furthermore, the end part of the coupler main body is provided with a clamping jaw accommodating cavity distributed along the radial direction of the spiral track, and the clamping jaw is movably arranged in the clamping jaw accommodating cavity, so that the clamping jaw can only perform linear displacement along the radial direction of the spiral track.

Furthermore, the radial section of the jaw accommodating cavity perpendicular to the spiral track is inverted T-shaped.

Furthermore, the jack catch along the radial both sides of spiral track seted up the sliding tray for the radial cross-section of jack catch perpendicular spiral track is the I shape, and the jack catch can imbed in the jack catch holds the chamber and follows the radial slip of spiral track.

Further, the track of the spiral track is a two-dimensional spiral line.

Furthermore, the concave cambered surfaces on the clamping parts are positioned in the same virtual cylindrical surface.

Furthermore, the number of the clamping jaws is 3, and the clamping jaws are distributed in a centrosymmetric mode relative to the center of the spiral track.

Furthermore, the driven bevel gear is perpendicular to the central axis of the coupling body.

Furthermore, 3 driving bevel gears are respectively arranged at one end of the coupler main body, and the meshing points of the 3 driving bevel gears and the driven bevel gears are symmetrical relative to the center of a circle of the driven bevel gears.

Furthermore, the middle part of the driving bevel gear is provided with a socket, and the driving bevel gear can be driven to rotate in one direction by matching an external auxiliary rotating tool with the socket.

The utility model provides a tight principle of operation clamp does: similar threaded connection, along a direction rotatory drive bevel gear, bevel gear drives driven disc wheel and rotates, is driven through the three jack catch of thread line and driven disc wheel complex, and virtual cylinder face diameter changes, is applicable to different hub connections. The coupler ensures that the three clamping jaws can not rotate freely through the one-way threads, so that the clamping of the shaft is ensured.

Compared with the prior art, the utility model has the advantages of it is following

1) The utility model adopts the bevel gear and the spiral wire coil to complete the clamping of the shaft, and the spiral wire can be reversely self-locked, so that the clamping is more stable, and the basic function of the shaft coupling is ensured;

2) the shaft clamping mode of the utility model can realize stepless reducing, is suitable for the connection requirements of shafts with different diameters, and improves the practicability of the shaft coupling;

3) the utility model discloses a can be perfect be applied to and carry out the scene of coupling under the not standard, the not measured prerequisite of specific size of machining dimension, the practicality is better.

Drawings

Fig. 1 is a perspective structure diagram of the stepless reducing coupling of the present invention;

fig. 2 is a schematic side view of the stepless reducing coupling of the present invention;

fig. 3 is a schematic view of a top view structure of the stepless reducing coupling of the present invention;

FIG. 4 is a schematic structural view of a claw receiving cavity of the present invention;

fig. 5 is a schematic structural view of a jaw in the present invention;

fig. 6 is the matching structure schematic diagram of the middle jaw and the jaw holding cavity of the present invention.

In the figure: 1. the driving bevel gear 11, the socket 2, the driven bevel gear 21, the spiral track 3, the jaws 31, the clamping part 32, the spiral toothed plate 33, the sliding groove 4 and the jaw accommodating cavity.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Examples

The stepless reducing coupling in this embodiment includes the coupling main part and locates bevel gear part and the clamping part on the coupling main part, and the both ends symmetry of coupling main part all is equipped with clamping part and the bevel gear part that matches with clamping part promptly.

The stepless reducing coupling in the embodiment includes a coupling main body, and a bevel gear part and a clamping part which are arranged at two ends of the coupling main body, as shown in fig. 1 and 2.

The coupler main body: the end part of the coupler main body is provided with a clamping jaw accommodating cavity 4 which is radially distributed along the spiral track 21, and the clamping jaw 3 is movably arranged in the clamping jaw accommodating cavity 4, so that the clamping jaw 3 can only perform linear displacement along the radial direction of the spiral track 21. The section of the claw receiving cavity 4 perpendicular to the radial direction of the spiral track 21 is in an inverted T shape.

Bevel gear components: the bevel gear component comprises a driving bevel gear 1 and a driven bevel gear 2, one side of the driven bevel gear 2 is a gear surface engaged with the gear on the driving bevel gear 1, and the other side is provided with a spiral track 21, which is shown in fig. 1 and the drawing. The track of the spiral track 21 is a two-dimensional spiral.

A clamping component: the clamping part comprises a plurality of clamping jaws 3 arranged on the spiral track 21, referring to fig. 1, the clamping jaws 3 are arranged at one end of the coupler body and can move along the radial direction of the coupler body, one end, facing the center of the spiral track 21, of each clamping jaw 3 is provided with a clamping part 31 with a concave arc surface, and a spiral toothed plate 32 matched with the spiral track 21 is arranged on the contact surface of each clamping jaw 3 and the spiral track 21, referring to fig. 5. When the driving bevel gear 1 rotates in a single direction, the driven bevel gear 2 is driven to rotate, and the spiral tooth plates 32 slide relative to the spiral tracks 21, so that the distance between the clamping jaws 3 and the centers of the spiral tracks 21 is increased or decreased, and shaft rods with different shaft diameters are clamped. The clamping jaw 3 is provided with sliding grooves 33 along two radial sides of the spiral track 21, so that the section of the clamping jaw 3 perpendicular to the radial direction of the spiral track 21 is I-shaped, and the clamping jaw 3 can be embedded into the clamping jaw accommodating cavity 4 and can slide along the radial direction of the spiral track 21. The concave arc surfaces on the clamping part 31 are positioned in the same virtual cylindrical surface.

In a practical implementation, there are 3 claws 3, which are distributed in a central symmetry with respect to the center of the spiral track 21, see fig. 3 and 6. The driven bevel gear 2 is vertical to the central axis of the coupler body. The number of the drive bevel gears 1 is 3 respectively arranged at one end of the coupler body, and the meshing points of the 3 drive bevel gears 1 and the driven bevel gears 2 are symmetrical relative to the center of a circle of the driven bevel gears 2, as shown in fig. 2. The middle part of the driving bevel gear 1 is provided with a socket 11, and the driving bevel gear 1 can be driven to rotate in one direction by matching an external auxiliary rotating tool with the socket 11.

The use process comprises the following steps: the middle part of the driving bevel gear 1 is provided with a socket 11, and the driving bevel gear 1 can be driven to rotate by matching an external auxiliary rotating tool with the socket 11. When the driving bevel gear 1 is screwed, the driven bevel gear 2 is driven to operate, the clamping jaws 3 are driven by the spiral track 21 to move along the radial direction of the spiral track 21 through the sliding of the spiral tooth plates 32 relative to the spiral track 21, and the distance between the clamping jaws 3 and the center of the spiral track 21 is increased or decreased through the forward rotation or the reverse rotation of the driving bevel gear 1, so that shaft rods with different shaft diameters are clamped. The coupler ensures that 3 clamping jaws 3 can not rotate freely through one-way threads, so that the clamping of a shaft is ensured.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. A stepless variable diameter coupling is characterized by comprising a coupling main body, and bevel gear components and clamping components which are arranged at two ends of the coupling main body;

the bevel gear component comprises a driving bevel gear (1) and a driven bevel gear (2), one side of the driven bevel gear (2) is a gear surface meshed with a gear on the driving bevel gear (1), and the other side is provided with a spiral track (21);

the clamping component comprises a plurality of clamping jaws (3) arranged on the spiral track (21), the clamping jaws (3) are arranged at one end of the coupler main body and can move along the radial direction of the coupler main body, one ends, facing the center of the spiral track (21), of the clamping jaws (3) are provided with clamping parts (31) with concave arc surfaces, and spiral toothed plates (32) matched with the spiral track (21) are arranged on the contact surfaces of the clamping jaws (3) and the spiral track (21);

when the driving bevel gear (1) rotates in a single direction, the driven bevel gear (2) is driven to rotate, the spiral toothed plate (32) slides relative to the spiral track (21), so that the distance between the clamping jaws (3) and the center of the spiral track (21) is increased or reduced, and shaft rods with different shaft diameters are clamped.

2. The stepless reducing coupling according to claim 1, wherein the end of the coupling body is provided with claw receiving cavities (4) which are radially distributed along the spiral track (21), and the claws (3) are movably arranged in the claw receiving cavities (4), so that the claws (3) can only linearly displace along the radial direction of the spiral track (21).

3. A coupling as claimed in claim 2, wherein the jaw receiving cavity (4) is inverted T-shaped in cross section perpendicular to the radial direction of the helical track (21).

4. The stepless variable diameter coupling according to claim 3, wherein the jaws (3) are provided with sliding grooves (33) along two radial sides of the spiral track (21), so that the radial section of the jaws (3) perpendicular to the spiral track (21) is in an I shape, and the jaws (3) can be embedded into the jaw accommodating cavities (4) and slide along the radial direction of the spiral track (21).

5. A coupling as claimed in claim 1, wherein the track of the helical track (21) is a two-dimensional helix.

6. A coupling according to claim 1, characterized in that the concave surfaces of the clamping portions (31) are located on the same virtual cylinder.

7. A coupling according to claim 1, characterized in that there are 3 dogs (3) which are arranged in a central symmetrical arrangement with respect to the centre of the spiral track (21).

8. The stepless variable diameter coupling according to claim 1, wherein the driven bevel gear (2) is perpendicular to the central axis of the coupling body.

9. The stepless variable diameter coupling according to claim 1, wherein the number of the drive bevel gears (1) is 3 at one end of the coupling body, and the meshing points of the 3 drive bevel gears (1) and the driven bevel gears (2) are symmetrical relative to the center of the circle of the driven bevel gears (2).

10. The stepless variable diameter coupling according to claim 1, wherein the middle part of the drive bevel gear (1) is provided with a socket (11), and the drive bevel gear (1) can be driven to rotate in one direction by matching an external auxiliary rotating tool with the socket (11).