CN214699029U

CN214699029U - Tensioning device, transmission mechanism and elevator

Info

Publication number: CN214699029U
Application number: CN202120158128.6U
Authority: CN
Inventors: 张金虎
Original assignee: Beijing Jingdong Qianshi Technology Co Ltd
Current assignee: Beijing Jingdong Qianshi Technology Co Ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-11-12
Anticipated expiration: 2031-01-20

Abstract

The utility model relates to a overspeed device tensioner, drive mechanism and lifting machine, overspeed device tensioner are used for the tensioning hold-in range, and overspeed device tensioner includes frame, swing mechanism and operating parts, and swing mechanism includes swing span and take-up pulley, and the swing span articulates in the frame, and the take-up pulley is connected in the swing span, and the operating parts is connected in the frame, during the operation operating parts, can drive the swing span to the direction swing that is close to the hold-in range to make take-up pulley tensioning hold-in range. The utility model discloses the motion mode of take-up pulley is the swing, and hold-in range biasing's problem can not appear in the swing mode for the tensioning effect is better, and the structure is simpler.

Description

Tensioning device, transmission mechanism and elevator

Technical Field

The utility model discloses generally relate to the logistics technology field, particularly, relate to a overspeed device tensioner, drive mechanism and lifting machine.

Background

The synchronous belt can be loosened after running for a certain time, and in order to ensure the transmission capacity of the belt, a tensioning device is required to tension the synchronous belt.

In the related art, the synchronous belt is tensioned by a manner that a tensioning wheel presses against the synchronous belt. However, the existing tensioning wheel is supported by the translation mode, and the tensioning wheel is supported by the translation mode in the process of translation, so that the two ends of the tensioning wheel can be asynchronously supported by the synchronization belt, the bias phenomenon is caused, and the abrasion of the synchronization belt is caused in a long time.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an aspect provides a tensioning device that tensioning effect is good.

The embodiment of the utility model provides a another aspect provides a drive mechanism including above-mentioned overspeed device tensioner.

The embodiment of the utility model provides a still another aspect provides an elevator including above-mentioned drive mechanism.

The tensioning device provided by the embodiment of the utility model is used for tensioning a synchronous belt, and comprises a frame, a swinging mechanism and an operating part, wherein the swinging mechanism comprises a swinging frame and a tensioning wheel; the operating piece is connected with the frame; when the operating piece is operated, the swinging frame can be driven to swing towards the direction close to the synchronous belt, so that the tensioning wheel tensions the synchronous belt.

According to some embodiments of the invention, the synchronous belt is in driving connection with the master and slave synchronous wheels;

the rotation axis of the swing frame, the rotation axis of the master synchronizing wheel and the rotation axis of the slave synchronizing wheel are parallel to each other.

According to some embodiments of the invention, the tensioning wheel is rotatably connected to the swing frame, the axis of rotation of the tensioning wheel being parallel to the axis of rotation of the swing frame.

According to some embodiments of the invention, the swing mechanism further comprises a slider slidably connected to the swing frame;

when the operating piece is operated, the operating piece abuts against the sliding piece so as to drive the sliding piece to slide relative to the swinging frame.

According to some embodiments of the invention, the swing frame comprises two oppositely arranged swinging members and a support member arranged between the two swinging members, each swinging member having a guide portion;

the sliding part is provided with two sliding parts which are respectively connected with the two guide parts in a sliding way.

According to some embodiments of the invention, the frame is a box; the operating part is rod-shaped, and the operating part movably runs through the lateral wall of frame, the one end of operating part expose in the outer wall of lateral wall, the other end of operating part is located in the frame, be used for the butt swing mechanism.

According to some embodiments of the invention, the tensioning device further comprises a locking member for locking the position of the operating member relative to the side wall.

According to some embodiments of the invention, the operating member comprises an externally threaded portion, the externally threaded portion being threadedly connected to the side wall.

According to some embodiments of the present invention, the frame further comprises a sleeve, the sleeve runs through the side wall, the sleeve has an internal thread portion, the external thread portion is screwed in the telescopic internal thread portion, the length of the internal thread portion is greater than the thickness of the side wall.

According to some embodiments of the invention, the swing mechanism further comprises a slider slidably connected to the swing frame, the slider having a limit portion;

the operating piece further comprises a rotating part, and the rotating part is arranged at one end of the external thread part and is rotatably connected to the limiting part;

when the operating piece is rotated, the rotating part rotates relative to the limiting part, and the operating piece moves relative to the side wall to drive the sliding piece to slide relative to the swinging frame.

According to some embodiments of the present invention, the tensioner further comprises a guide synchronizing wheel rotatably connected to the frame and adjacent to the main synchronizing wheel; the guide synchronizing wheel is in contact with the inner side face of the synchronous belt, and the rotation axis of the guide synchronizing wheel is parallel to the rotation axis of the swing frame.

The transmission mechanism of the embodiment of the utility model comprises a main synchronizing wheel, a slave synchronizing wheel, a synchronous belt and any one of the tension devices, wherein the synchronous belt is wound on the main synchronizing wheel and the slave synchronizing wheel; the tensioning device is used for tensioning the synchronous belt.

The utility model discloses lifting machine, include like foretell drive mechanism.

An embodiment in the above-mentioned utility model has following advantage or beneficial effect:

the utility model discloses overspeed device tensioner through the operation operating parts to drive swing mechanism is to the direction swing of being close to the hold-in range, makes the take-up pulley support and presses the hold-in range, thereby realizes the tensioning effect. Compare the motion mode of take-up pulley translation among the correlation technique, the utility model discloses the motion mode of take-up pulley is the swing, and hold-in range biasing's problem can not appear in the swing mode for the tensioning effect is better, and the structure is simpler.

Drawings

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 shows a schematic structural diagram of a transmission mechanism according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of an internal structure of a transmission mechanism according to an embodiment of the present invention.

Fig. 3 is another schematic internal structure diagram of the transmission mechanism according to the embodiment of the present invention.

Fig. 4 is a schematic structural diagram of the transmission mechanism removing frame according to the embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a swing mechanism according to an embodiment of the present invention.

Fig. 6 is a sectional view of the swing mechanism according to the embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a slider according to an embodiment of the present invention.

Fig. 8 is a schematic structural view of an operating element according to an embodiment of the present invention.

Fig. 9 shows a partial enlarged view at a in fig. 4.

Fig. 10 shows a cross-sectional view of a transmission mechanism according to an embodiment of the present invention.

Fig. 11 shows a partial enlarged view at B in fig. 10.

Wherein the reference numerals are as follows:

100. rack

110. Side wall

120. Sleeve barrel

200. Swing mechanism

210. Swing frame

211. Swinging member

2111. Guide part

212. Support piece

220. Tension wheel

230. Sliding member

231. Sliding part

232. Limiting part

300. Operating element

310. External thread part

320. Rotating part

410. Synchronous belt

420. Main synchronizing wheel

500. Locking piece

600. Guide synchronizing wheel

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

As shown in fig. 1 to 3, fig. 1 is a schematic structural diagram of a transmission mechanism according to an embodiment of the present invention, fig. 2 is a schematic structural diagram of an internal structure of a transmission mechanism according to an embodiment of the present invention, and fig. 3 is a schematic structural diagram of another internal structure of a transmission mechanism according to an embodiment of the present invention. The utility model discloses drive mechanism includes main synchronizing wheel 420, follows synchronizing wheel, hold-in range 410 and overspeed device tensioner, and hold-in range 410 is around locating main synchronizing wheel 420 and following synchronizing wheel, and hold-in range 410 is connected with main synchronizing wheel 420 and follow the synchronizing wheel transmission, and overspeed device tensioner is used for tensioning hold-in range 410. The timing belt 410 may be annular, and a master synchronizing wheel 420 and a slave synchronizing wheel are wound around both ends thereof, respectively, and in fig. 1 to 3, the slave synchronizing wheel is not shown.

The tensioning device comprises a machine frame 100, a swing mechanism 200 and an operating member 300, wherein the swing mechanism 200 comprises a swing frame 210 and a tension wheel 220, the swing frame 210 is hinged to the machine frame 100, the tension wheel 220 is connected to the swing frame 210, and the operating member 300 is connected to the machine frame 100. When the operation member 300 is operated, the swing frame 210 can be driven to swing in a direction close to the synchronous belt 410, so as to drive the tension pulley 220 to abut against the synchronous belt 410, thereby realizing tension.

The rack 100 may be a box and includes four sidewalls 110 connected in sequence, the four sidewalls 110 enclose an accommodation space, and the main synchronizing wheel 420 is rotatably accommodated in the accommodation space. The swing mechanism 200 is adjacent to the main synchronizing wheel 420, and the tension wheel 220 of the swing mechanism 200 can press the part of the synchronous belt 410 close to the main synchronizing wheel 420, so that the wrap angle of the main synchronizing wheel 420 is large enough to ensure the transmission effect. The oscillating mechanism 200 can be oscillated inward against the timing belt 410 to generate a tension.

As shown in fig. 2, the tension pulley 220 is rotatably connected to the swing frame 210, and the rotation axis of the swing frame 210, the rotation axis of the tension pulley 220, the rotation axis of the master synchronizing wheel 420 and the rotation axis of the slave synchronizing wheel are parallel to each other.

Through the design that the above-mentioned axis of rotation is parallel to each other, when the swing span 210 swung to the direction that is close to hold-in range 410, the axis of rotation of take-up pulley 220 can remain parallel with the axis of rotation of main synchronizing wheel 420 throughout, ensured that the both ends of take-up pulley 220 can support in step and press hold-in range 410, one end take-up pulley 220 can not appear and has supported and press hold-in range 410, and the other end has not supported and presses hold-in range 410 yet, leads to hold-in range 410 off tracking.

As shown in fig. 2 and 4, fig. 4 is a schematic structural diagram of the transmission mechanism of the embodiment of the present invention with the frame removed. The utility model discloses overspeed device tensioner still includes direction synchronizing wheel 600, and direction synchronizing wheel 600 rotates to be connected in frame 100, and the adjacent main synchronizing wheel 420 of locating. The guide synchronizing wheel 600 is in contact with the inner side surface of the timing belt 410, and the rotation axis of the guide synchronizing wheel 600 is parallel to the rotation axis of the swing frame 210. The guide synchronizing wheel 600 is added, the swing mechanism 200 only needs to swing by a small angle, the synchronous belt 410 can be tensioned, and the tensioning effect of the tensioning device is further improved.

As shown in fig. 5 and 6, fig. 5 is a schematic structural diagram of a swing mechanism according to an embodiment of the present invention, and fig. 6 is a cross-sectional view of the swing mechanism according to an embodiment of the present invention. The swing mechanism 200 further includes a slider 230, the slider 230 being slidably coupled to the swing frame 210. When the operation member 300 is operated, the operation member 300 abuts against the slider 230 to push the slider 230 to slide with respect to the swing frame 210. Specifically, when the operating member 300 is operated inward, the operating member 300 and the slider 230 can move in one direction, and the slider 230 can drive the swing frame 210 to swing since the slider 230 is slidably connected to the swing frame 210.

The swing frame 210 includes two swing members 211 disposed opposite to each other and a support member 212 disposed between the two swing members 211, and each swing member 211 has a guide portion 2111. The slider 230 has two sliding portions 231, and the two sliding portions 231 are slidably connected to the two guide portions 2111, respectively. The tension pulley 220 is rotatably interposed between the two oscillating members 211.

Referring to fig. 5, the guiding portion 2111 may be a slot, and the sliding portion 231 may be inserted into the slot and can slide along the slot.

Of course, it is understood that the guiding portion 2111 may have other guiding structures, which are not listed here.

As shown in fig. 7, fig. 7 is a schematic structural diagram of a sliding member according to an embodiment of the present invention. The sliding member 230 has sliding portions 231 at two ends thereof, and the sliding portions 231 may be cylinders capable of being inserted into the elongated holes. The cylinder is also able to rotate relative to the oscillating piece 211 during the sliding of the sliding piece 230 along the elongated hole.

The slider 230 further includes a limiting portion 232, and one end of the operating element 300 can be engaged with the limiting portion 232, so that one end of the operating element 300 can abut against the slider 230, and the operating element 300 can rotate relative to the slider 230.

The position-limiting portion 232 may be a hole, and one end of the operating element 300 is rotatably received in the hole.

The operating element 300 movably penetrates through the sidewall 110 of the rack 100, one end of the operating element 300 is exposed out of the outer wall surface of the sidewall 110, and the other end of the operating element 300 is located in the rack 100 and is used for abutting against the swing mechanism 200.

When tensioning the timing belt 410, an operator may move the operation member 300 into the frame 100, so that one end of the operation member 300 can gradually press the swing mechanism 200, thereby swinging the swing mechanism 200, and finally tensioning the timing belt 410.

As shown in fig. 8, fig. 8 is a schematic structural diagram of an operating element according to an embodiment of the present invention. The operating member 300 according to the embodiment of the present invention includes an externally threaded portion 310 and a rotating portion 320. The external thread portion 310 is threadedly coupled to the sidewall 110, and the rotating portion 320 is engaged with the stopper portion 232 of the slider 230.

Since the operator rotates the operation element 300 and the operation element 300 is screwed to the side wall 110, the operation element 300 can move in the housing 100 relative to the side wall 110. In the process of rotating the operating element 300, the rotating portion 320 is rotatably connected to the limiting portion 232, and an end surface of the external thread portion 310 can press against the sliding member 230, so as to finally swing the swing frame 210.

The rotating portion 320 may be a cylinder, the outer surface of the cylinder may be a smooth surface, and the cylinder and the limiting portion 232 of the sliding member 230 may be in clearance fit, so that the operating member 300 can rotate relative to the sliding member 230.

As shown in fig. 9 to 11, fig. 9 is a partial enlarged view of a portion a in fig. 4, fig. 10 is a sectional view of a transmission mechanism according to an embodiment of the present invention, and fig. 11 is a partial enlarged view of a portion B in fig. 10. The rack 100 further includes a sleeve 120, the sleeve 120 penetrates the sidewall 110, the sleeve 120 has an internal thread portion, the external thread portion 310 of the operating member 300 is screwed to the internal thread portion of the sleeve 120, and the length of the internal thread portion is greater than the thickness of the sidewall 110.

Instead of being directly threaded onto the sidewall 110, the operator 300 is designed to be threaded onto the sleeve 120, primarily because the sidewall 110 has a relatively thin wall thickness and a relatively small number of threads, which cannot take up the thread locking force. By increasing the sleeve 120 and making the length of the internal thread portion of the sleeve 120 greater than the thickness of the sidewall 110, the length of the threaded engagement of the operation element 300 can be increased, ensuring stability of the operation element 300 during rotation.

The tensioning device of the embodiment of the present invention further includes a locking member 500 for locking the position of the operation member 300 with respect to the side wall 110. The locker 500 may be a nut based on the operator 300 having the male screw portion 210.

The embodiment of the utility model provides an on the other hand still provides a lifting machine, drive mechanism in the above-mentioned arbitrary embodiment. The elevator of the present embodiment has all the advantages and benefits of the above embodiments due to the inclusion of the transmission mechanism of any of the above embodiments, and further description is omitted here.

To sum up, the utility model discloses overspeed device tensioner, drive mechanism and lifting machine's advantage and beneficial effect lie in:

In the embodiments of the present invention, the terms "mounting," "connecting," "fixing," and the like are used in a broad sense, for example, the term "connecting" may be a fixed connection, a detachable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the embodiments of the present invention should be included in the scope of the embodiments of the present invention.

Claims

1. A tensioning device for tensioning a synchronous belt (410), comprising:

a frame (100);

the swinging mechanism (200) comprises a swinging frame (210) and a tension pulley (220), the swinging frame (210) is hinged to the machine frame (100), and the tension pulley (220) is connected to the swinging frame (210); and

an operating member (300) connected to the chassis (100); when the operating element (300) is operated, the swing frame (210) can be driven to swing in a direction approaching the synchronous belt (410), so that the tension pulley (220) tensions the synchronous belt (410).

2. The tensioner as in claim 1, wherein the timing belt (410) is in driving connection with a master timing wheel (420) and a slave timing wheel;

the axis of rotation of the swing frame (210), the axis of rotation of the master synchronizing wheel (420) and the axis of rotation of the slave synchronizing wheel are parallel to each other.

3. The tensioning device according to claim 2, characterized in that the tensioning wheel (220) is rotatably connected to the swing frame (210), the axis of rotation of the tensioning wheel (220) being parallel to the axis of rotation of the swing frame (210).

4. The tensioning device according to claim 1, characterized in that the oscillating mechanism (200) further comprises a slider (230), the slider (230) being slidably connected to the oscillating frame (210);

when the operating piece (300) is operated, the operating piece (300) abuts against the sliding piece (230) to drive the sliding piece (230) to slide relative to the swinging frame (210).

5. Tensioner according to claim 4, characterized in that said oscillating bracket (210) comprises two oppositely arranged oscillating members (211) and a support member (212) arranged between said oscillating members (211), each oscillating member (211) having a guide portion (2111);

the slider (230) has two sliding portions (231), and the two sliding portions (231) are slidably connected to the two guide portions (2111), respectively.

6. Tensioner according to claim 1, characterized in that said frame (100) is a box; the operating part (300) is in a rod shape, the operating part (300) movably penetrates through a side wall (110) of the rack (100), one end of the operating part (300) is exposed out of the outer wall surface of the side wall (110), and the other end of the operating part (300) is located in the rack (100) and used for being abutted to the swinging mechanism (200).

7. The tensioning device according to claim 6, characterized in that it further comprises a locking member (500) for locking the position of the operating member (300) with respect to the side wall (110).

8. The tensioning device according to claim 6, characterized in that the operating member (300) comprises an externally threaded portion (310), the externally threaded portion (310) being screwed to the side wall (110).

9. The tensioner as claimed in claim 8, characterized in that the frame (100) further comprises a sleeve (120), the sleeve (120) extending through the side wall (110), the sleeve (120) having an internal thread, the external thread (310) being screwed to the internal thread of the sleeve (120), the internal thread having a length greater than the thickness of the side wall (110).

10. The tensioning device according to claim 8, characterized in that the oscillating mechanism (200) further comprises a slider (230), the slider (230) being slidably connected to the oscillating frame (210), the slider (230) having a limit stop (232);

the operating piece (300) further comprises a rotating part (320), wherein the rotating part (320) is arranged at one end of the external thread part (310) and is rotatably connected to the limiting part (232);

when the operating piece (300) is rotated, the rotating part (320) rotates relative to the limiting part (232), and the operating piece (300) moves relative to the side wall (110) so as to drive the sliding piece (230) to slide relative to the swing frame (210).

11. The tensioning device according to claim 2, characterized in that it further comprises a guide synchronizing wheel (600), said guide synchronizing wheel (600) being rotatably connected to said frame (100) and being arranged adjacent to said main synchronizing wheel (420); the guide synchronizing wheel (600) is in contact with the inner side face of the synchronous belt (410), and the rotation axis of the guide synchronizing wheel (600) is parallel to the rotation axis of the swing frame (210).

12. A transmission mechanism, comprising:

a main synchronizing wheel (420);

a slave synchronizing wheel;

the synchronous belt (410) is wound on the main synchronous wheel (420) and the auxiliary synchronous wheel (410); and

the tensioning device of any of claims 1 to 11, for tensioning the timing belt (410).

13. A hoisting machine comprising a drive mechanism as claimed in claim 12.