CN215110343U

CN215110343U - Tensioning device and elevator

Info

Publication number: CN215110343U
Application number: CN202120420479.XU
Authority: CN
Inventors: 李洪涛
Original assignee: Beijing Jingdong Qianshi Technology Co Ltd
Current assignee: Beijing Jingdong Qianshi Technology Co Ltd
Priority date: 2021-02-25
Filing date: 2021-02-25
Publication date: 2021-12-10
Anticipated expiration: 2031-02-25

Abstract

The utility model relates to the technical field of warehouse logistics, in particular to a tensioning device and a hoister, wherein the tensioning device comprises a tensioning wheel shaft, a tensioning wheel, a synchronous belt, a screw rod seat and an elastic piece, the tensioning wheel is arranged on the tensioning wheel shaft, and the synchronous belt is wound on the tensioning wheel; the screw rod seat is fixedly arranged, the first end of the screw rod is connected with the tensioning wheel shaft, the second end of the screw rod penetrates through the through hole in the screw rod seat, and the second end of the screw rod is connected with the first locking nut; the elastic piece is compressed and arranged between the screw rod seat and the first locking nut. The utility model discloses a set up the elastic component of compression state between screw rod seat and first lock nut for the screw rod receives a tensile force that removes to tensioning hold-in range direction all the time, and when the hold-in range because long-time operation or temperature rise produce when extending, the screw rod can drive the take-up pulley and remove to the direction of tensioning hold-in range under the effect of the tensioning force of elastic component, thereby has compensated the extension of hold-in range, has avoided the hold-in range appearance to jump the tooth phenomenon.

Description

Tensioning device and elevator

Technical Field

The utility model relates to a storage logistics technical field especially relates to a overspeed device tensioner and lifting machine.

Background

The hoister generally adopts a motor reducer to drive a synchronous belt pulley to drive a synchronous belt to rotate, and the synchronous belt drives a platform to realize ascending or descending action. In the prior art, a screw is generally adopted to pull a tension pulley to tension a synchronous belt, at the initial debugging and running stage of a hoister, the screw can be adjusted to a proper position for tensioning the synchronous belt, but after the hoister is put into production and used, the synchronous belt can be stretched for a long time or can be stretched along with temperature rise, and the traditional hoister can not compensate the stretching amount of the synchronous belt, so that the phenomenon of tooth skipping of the synchronous belt is caused; in addition, when the tensioning became invalid, the prior hoister also can not give an early warning in advance, and only when the equipment can not normally run, the maintainer can know and maintain the equipment, so that the working efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a overspeed device tensioner and lifting machine to solve prior art unable compensation hold-in range and produce the extension because long-time operation or temperature rise, thereby the hold-in range that leads to jumps the technical problem of tooth.

To achieve the purpose, the utility model adopts the following technical proposal:

a tensioner for tensioning a synchronous belt, comprising:

the tensioning wheel is arranged on the tensioning wheel shaft, and the synchronous belt is wound on the tensioning wheel;

the screw rod and the screw rod seat are fixedly arranged, a through hole is formed in the screw rod seat, a first end of the screw rod is connected with the tensioning wheel shaft, a second end of the screw rod penetrates through the through hole, and the second end of the screw rod is connected with a first locking nut;

the elastic piece is sleeved on the screw rod and compressed between the screw rod seat and the first locking nut.

As a preferable technical solution of the tensioner, the tensioner further includes a detection unit, and the detection unit is capable of outputting an alarm signal when the tensioner moves in a direction in which the tensioner axially releases the synchronous belt.

As a preferable technical solution of the tensioner, the detecting assembly includes:

the detection plate is arranged on the tensioning wheel shaft;

and the proximity switch is fixedly arranged on the switch base, and when the tensioning wheel axially moves in a direction of loosening the synchronous belt, the detection plate can shield the proximity switch so as to trigger the proximity switch to output an alarm signal.

As a preferable technical scheme of the tensioning device, the cross section of the detection plate is in an L shape, and the detection plate comprises a first plate and a second plate which are vertically connected, wherein the first plate is connected with the tensioning wheel shaft, and the second plate is matched with the proximity switch.

As a preferred technical scheme of the tensioning device, a connecting hole is formed in the tensioning wheel shaft, the first end of the screw rod is provided with a limiting part, a second locking nut is connected to the screw rod, the screw rod penetrates through the connecting hole, and the tensioning wheel shaft is fixed between the limiting part and the second locking nut; the first plate of the detection plate is sleeved on the screw rod, and the first plate is fixed between the limiting part and the tensioning wheel shaft.

As a preferable technical solution of the tensioning device, a surface of the tensioning axle abutting against the second lock nut is provided as a flat surface.

As a preferred technical scheme of the tensioning device, the tensioning device further comprises a transmission case, strip-shaped holes are formed in two opposite side surfaces of the transmission case along the tightness direction of the synchronous belt, the tensioning wheel shaft is located in the transmission case, two ends of the tensioning wheel shaft extend out of the strip-shaped holes, and the screw rod seat and the switch seat are fixedly arranged in the transmission case.

As a preferable technical scheme of the tensioning device, the switch base is L-shaped in cross section and comprises a third plate and a fourth plate which are vertically connected, the third plate is fixedly connected with the transmission case, and the proximity switch is arranged on the fourth plate.

As a preferable technical solution of the tensioning device, a spacer is provided between the elastic member and the first lock nut.

A hoisting machine comprising a tensioning device as defined in any one of the preceding claims.

The utility model has the advantages that:

the utility model provides a tensioning device, which comprises a tensioning wheel shaft, a tensioning wheel, a screw rod seat and an elastic piece, wherein the tensioning wheel is arranged on the tensioning wheel shaft, and a synchronous belt is wound on the tensioning wheel; the screw rod seat is fixedly arranged, a through hole is formed in the screw rod seat, the first end of the screw rod is connected with the tensioning wheel shaft, the second end of the screw rod penetrates through the through hole, and the second end of the screw rod is connected with a first locking nut; the screw rod is located to the elastic component cover, and the elastic component compression sets up between screw rod seat and first lock nut. Through the elastic component that sets up compression state between screw rod seat and first lock nut for the screw rod receives a tensile force that removes to tensioning hold-in range direction all the time, and when the hold-in range because long-time operation or temperature rise produced the extension, the screw rod can drive the take-up pulley to the direction removal of tensioning hold-in range under the effect of the tensioning force of elastic component, thereby has compensated the extension of hold-in range, has avoided the hold-in range to appear jumping the tooth phenomenon.

Drawings

Fig. 1 is a perspective view of a tensioning device provided by an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a perspective view of the tensioning device according to the embodiment of the present invention with a side plate of the transmission case removed;

fig. 4 is a front view of a tensioner provided by an embodiment of the present invention;

fig. 5 is a side view of a tensioning device provided by an embodiment of the present invention.

In the figure:

10. a transmission case; 11. a strip-shaped hole; 20. a tension pulley shaft; 30. a tension wheel; 40. a synchronous belt; 50. a screw; 51. a first lock nut; 52. a limiting part; 53. a second lock nut; 54. a gasket; 60. a screw seat; 70. an elastic member; 80. a detection component; 81. detecting a plate; 811. a first plate; 812. a second plate; 82. a proximity switch; 90. a switch base; 91. a third plate; 92. and a fourth plate.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 5, the present invention provides a tensioning device for tensioning a synchronous belt 40, comprising a tensioning wheel shaft 20, a tensioning wheel 30, a screw 50, a screw seat 60 and an elastic element 70, wherein the tensioning wheel 30 is arranged on the tensioning wheel shaft 20, and the synchronous belt 40 is wound on the tensioning wheel 30; the screw rod seat 60 is fixedly arranged, a through hole is formed in the screw rod seat 60, the first end of the screw rod 50 is connected with the tensioning wheel shaft 20, the second end of the screw rod 50 penetrates through the through hole, and the second end of the screw rod 50 is connected with the first locking nut 51; the elastic element 70 is sleeved on the screw 50, and the elastic element 70 is compressed between the screw seat 60 and the first lock nut 51. Preferably, a spacer 54 is disposed between the elastic member 70 and the first lock nut 51. Through the elastic member 70 that sets up the compression state between screw rod seat 60 and first lock nut 51 for screw rod 50 receives a tensile force that removes to tensioning hold-in range 40 direction all the time, and when hold-in range 40 because long-time operation or temperature rise produced the extension, screw rod 50 can drive take-up pulley 30 to tensioning hold-in range 40's direction removal under the effect of the tensioning force of elastic member 70, thereby compensated hold-in range 40's extension, avoided hold-in range 40 to appear jumping the tooth phenomenon.

Further, the utility model provides a overspeed device tensioner still includes detection component 80, and detection component 80 can be at tensioning wheel axle 20 when the direction that makes hold-in range 40 relax removes output alarm signal. Through the arrangement, maintenance personnel can be timely reminded to maintain when the elastic piece 70 fails, and equipment halt is avoided.

In this embodiment, the detecting assembly 80 includes a detecting plate 81 and a proximity switch 82, the detecting plate 81 is disposed on the tension pulley shaft 20, the proximity switch 82 is fixedly disposed on the switch base 90, and when the tension pulley shaft 20 moves to a direction to loosen the timing belt 40, the detecting plate 81 can shield the proximity switch 82 to trigger the proximity switch 82 to output an alarm signal. Simple structure and reliable detection. Or in other embodiments, the detecting assembly 80 may further include a detecting plate 81 and a sensor, the detecting plate 81 is disposed on the tension pulley shaft 20, a detecting hole is formed on the detecting plate 81, the sensor includes a light emitter and a light receiver that are oppositely and fixedly disposed, when the tension pulley shaft 20 moves in a direction to loosen the synchronous belt 40, light emitted from the light emitter can pass through the detecting hole and be received by the light receiver, so as to trigger the sensor to output an alarm signal. Of course, the above is merely exemplary, and the form of the detection assembly 80 is not limited thereto.

Preferably, and referring to FIG. 2, sensing plate 81 is L-shaped in cross-section and includes a first plate 811 and a second plate 812 connected perpendicularly, first plate 811 being connected to tensioner shaft 20 and second plate 812 cooperating with proximity switch 82. The detection plate 81 is reasonable in structure arrangement, and is convenient to connect with the tensioning wheel shaft 20 and match with the proximity switch 82. Further preferably, a connecting hole is formed in the tensioning axle 20, a first end of the screw rod 50 is provided with a limiting part 52, a second locking nut 53 is connected to the screw rod 50, the screw rod 50 penetrates through the connecting hole, and the tensioning axle 20 is fixed between the limiting part 52 and the second locking nut 53; the first plate 811 of the detecting plate 81 is fitted over the screw 50, and the first plate 811 is fixed between the limiting portion 52 and the tension pulley shaft 20. Through the arrangement, the connection and the fixation of the screw 50 and the tensioning wheel shaft 20 are facilitated, and the connection and the fixation of the detection plate 81 are also facilitated. It is further preferred that the surface of the tensioner axle 20 abutting the second lock nut 53 is provided as a flat surface, so that the locking of the second lock nut 53 is more secure.

The utility model provides a overspeed device tensioner still includes transmission case 10, has seted up bar hole 11 along hold-in range 40's elasticity direction on the two opposite flanks of transmission case 10, and tensioning shaft 20 is located transmission case 10, and tensioning shaft 20's both ends are stretched out by bar hole 11, and screw rod seat 60 and switch seat 90 are all fixed to be set up in transmission case 10. Through setting up transmission case 10, can enough shelter from the protection to take-up pulley 30 and take-up pulley shaft 20, the fixed setting of screw base 60 and switch seat 90 of still being convenient for.

Preferably, referring to fig. 2, the switch base 90 has an L-shaped cross section, and includes a third plate 91 and a fourth plate 92 vertically connected, the third plate 91 is fixedly connected to the transmission case 10, and the proximity switch 82 is disposed on the fourth plate 92. Through the arrangement, the switch base 90 is convenient to be connected and fixed with the transmission case 10, and the proximity switch 82 is convenient to be arranged.

The utility model also provides a hoisting machine, including the overspeed device tensioner as above, through adopting above-mentioned overspeed device tensioner, can be when hold-in range 40 produces the extension because long-time operation or temperature rise, screw rod 50 drives take-up pulley 30 to the direction removal of tensioning hold-in range 40 under the effect of the tensioning force of elastic component 70, thereby compensate the extension of hold-in range 40, avoid hold-in range 40 to appear jumping the tooth phenomenon; in addition, maintenance personnel can be reminded to maintain in time when the elastic piece 70 fails, and equipment halt is avoided.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A tensioning device for tensioning a synchronous belt (40), comprising:

the tensioning device comprises a tensioning wheel shaft (20) and a tensioning wheel (30), wherein the tensioning wheel (30) is arranged on the tensioning wheel shaft (20), and the synchronous belt (40) is wound on the tensioning wheel (30);

the tensioning wheel comprises a screw (50) and a screw seat (60), wherein the screw seat (60) is fixedly arranged, a through hole is formed in the screw seat (60), a first end of the screw (50) is connected with the tensioning wheel shaft (20), a second end of the screw (50) penetrates through the through hole, and the second end of the screw (50) is connected with a first locking nut (51);

the elastic piece (70) is sleeved on the screw rod (50), and the elastic piece (70) is compressed and arranged between the screw rod seat (60) and the first locking nut (51).

2. The tensioner as in claim 1, further comprising a detection assembly (80), the detection assembly (80) being capable of outputting an alarm signal when the tensioner roller (20) moves in a direction to loosen the timing belt (40).

3. Tensioner according to claim 2, characterized in that said detection assembly (80) comprises:

a detection plate (81) arranged on the tensioning wheel shaft (20);

and the proximity switch (82) is fixedly arranged on the switch base (90), and when the tensioning wheel shaft (20) moves towards the direction of loosening the synchronous belt (40), the detection plate (81) can shield the proximity switch (82) so as to trigger the proximity switch (82) to output an alarm signal.

4. A tensioner as claimed in claim 3, characterised in that said detecting plate (81) is L-shaped in cross-section and comprises a first plate (811) and a second plate (812) connected perpendicularly, said first plate (811) being connected to said tensioner axle (20) and said second plate (812) cooperating with said proximity switch (82).

5. The tensioning device according to claim 4, wherein a connecting hole is formed in the tensioning axle (20), the first end of the screw (50) is provided with a limiting part (52), a second locking nut (53) is connected to the screw (50), the screw (50) penetrates through the connecting hole, and the tensioning axle (20) is fixed between the limiting part (52) and the second locking nut (53); the first plate (811) of the detection plate (81) is sleeved on the screw (50), and the first plate (811) is fixed between the limiting part (52) and the tensioning wheel shaft (20).

6. Tensioner according to claim 5, characterized in that the face of the tensioner wheel spindle (20) against which the second lock nut (53) abuts is arranged as a plane.

7. The tensioning device according to claim 3, further comprising a transmission case (10), wherein a strip-shaped hole (11) is formed in each of two opposite side surfaces of the transmission case (10) along the tightness direction of the synchronous belt (40), the tensioning wheel shaft (20) is located in the transmission case (10), two ends of the tensioning wheel shaft (20) extend out from the strip-shaped holes (11), and the screw seat (60) and the switch seat (90) are both fixedly arranged on the transmission case (10).

8. Tensioner according to claim 7, characterized in that said switch seat (90) is L-shaped in cross-section and comprises a third plate (91) and a fourth plate (92) connected vertically, said third plate (91) being fixedly connected to said transmission case (10), said proximity switch (82) being arranged on said fourth plate (92).

9. Tensioner according to claim 1, characterized in that a spacer (54) is arranged between said elastic element (70) and said first lock nut (51).

10. A hoisting machine comprising a tensioning device according to any one of claims 1-9.