CN211895879U

CN211895879U - Electric hoist

Info

Publication number: CN211895879U
Application number: CN202020442362.7U
Authority: CN
Inventors: 张乐廷; 吴云峰
Original assignee: Chengdu Kaidepu Automation Equipment Co ltd
Current assignee: Chengdu Kaidepu Automation Equipment Co ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-11-10
Anticipated expiration: 2030-03-31

Abstract

The utility model provides an electric hoist relates to lifting means technical field, and it includes the guide beam of vertical setting, and it is provided with the lift slide to slide on the guide beam, is connected with lift platform on the lift slide, and on the lift slide was fixed in the chain, the chain meshing was connected on setting up drive sprocket and the driven sprocket on guide beam bottom and top respectively, and drive sprocket connects on drive unit, and driven sprocket connects on driven unit, is provided with anti-falling device on the lift slide. The problems that delivery of lifting equipment is not stable and failure rate is high in the prior art are solved.

Description

Electric hoist

Technical Field

The utility model relates to a lifting means technical field especially relates to an electric hoist.

Background

With the development of automation technology, material distribution, especially in the field of oil and gas equipment, carrying and distribution of hazardous chemical materials and the like is a potential safety hazard to artificial physical harm and strong labor force. Especially in high-altitude lifting distribution, the distribution process is difficult to realize in terms of safety, material distribution smoothness, high efficiency, durability and high precision.

In the existing distribution lifting equipment, the rough common lifting equipment is adopted, the structure configuration is simple, the cost is low, the distribution is not stable, the precision is rough, and the failure rate is high.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem among the prior art, the utility model provides an electric hoist has solved the problem that the lifting means delivery among the prior art is not steady, the fault rate is high.

In order to achieve the purpose of the invention, the technical scheme adopted by the utility model is as follows:

the utility model provides an electric hoist, its guide beam that includes vertical setting, the slip is provided with the lift slide on the guide beam, is connected with lift platform on the lift slide, and on the lift slide was fixed in the chain, the chain meshing was connected on setting up drive sprocket and the driven sprocket on guide beam bottom and top respectively, and drive sprocket connects on drive unit, and driven sprocket connects on driven unit, is provided with anti-falling device on the lift slide.

Further, the left end and the right end of the lifting sliding plate are respectively provided with a chain, the outer side of each chain is correspondingly provided with a guide beam, the bottom end and the top end of each guide beam are respectively provided with a driving chain wheel and a driven chain wheel, the two driving chain wheels are synchronously driven by the driving unit, and the two driven chain wheels are connected to the driven unit. The left side and the right side of the lifting sliding plate are respectively provided with the chain and the guide beam, so that the dynamic stability of the lifting sliding plate in the lifting process is improved; the two chains are driven by the same driving unit, so that the two chains are better in moving synchronism, and the stability and the reliability of the whole elevator in the process of lifting materials are greatly improved.

Furthermore, one end of the lifting sliding plate is connected to the corresponding guide beam in a sliding manner through the directional guide wheel, and the other end of the lifting sliding plate is connected to the corresponding guide beam in a sliding manner through the eccentric guide wheel. The directional guide wheel and the eccentric guide wheel can rotate while sliding along the guide beam so as to reduce the friction resistance in the sliding process; the fixed lifting slide of directional guide pulley is along the gliding direction of guide beam, adjusts eccentric guide pulley and can let eccentric guide pulley and guide beam zero clearance precision laminating to make lifting slide zero clearance rock along the guide beam and go up and down, improved the ride comfort of lifting slide lift in-process.

Furthermore, the lifting slide plate is fixedly connected with the chain through a chain connecting block, the anti-falling device comprises anti-falling beams which are arranged at the rear side of the chain in parallel, hanging holes are distributed on the anti-falling beams at intervals, the middle part of the anti-falling hook is connected to the chain connecting block through a pivot, the top end of the anti-falling hook is connected to the chain in a clamping mode through a pin shaft, one end of the tension spring is connected to the pin shaft, and the other end of the tension spring is connected to the lifting slide plate.

When the chain is in a tensioned state (namely the state of the chain in normal operation), the pin shaft clamped on the chain cannot rotate relative to the pivot joint, once the chain is loosened (namely equipment faults occur, such as chain breakage), the chain loses the constraint capacity on the pin shaft, the top end of the anti-falling hook is pulled under the elastic action generated by the recovery deformation of the tension spring, so that the anti-falling hook rotates around the pivot, in the rotating process, the bottom end of the anti-falling hook is inserted into a hanging hole in the anti-falling beam at the rear side, and therefore the lifting sliding plate and the lifting platform are prevented from falling in high altitude, not only is goods on the lifting platform prevented from being damaged, but also surrounding workers are prevented from being injured by falling objects in high altitude, and the operation safety of the equipment is improved.

Furthermore, an automatic tensioning device is arranged on the chain and comprises a tensioning wheel pressed on the chain, the tensioning wheel is rotatably connected to a tensioning swing arm, the middle of the tensioning swing arm is abutted to the tensioning seat, one end, far away from the tensioning wheel, of the tensioning swing arm is connected with a pull rod, and the pull rod is elastically pressed on the tensioning seat.

Tensioning swing arm and tensioning seat butt department form a fulcrum, and tensioning swing arm's one end supports tight chain through the take-up pulley, and the other end passes through pull rod elasticity and presses on the tensioning seat for as long as take-up pulley one end has not hard up, under the effect of elasticity, can promote the take-up pulley and be close to the chain until supporting tight chain, make the chain be in the tensioning state all the time, improved the validity of chain drive, and this in-process is automatic to be realized through mechanical structure, and the reliability is higher, and the cost is lower, need not the manpower and participates in.

Furthermore, the top and the bottom of guide beam all are provided with stop device. The limiting device comprises an electrical limiting device and a mechanical limiting device, and the electrical limiting device controls the accurate stopping position of the lifting platform; the mechanical limit is used as a limit, so that the equipment is prevented from rushing out and falling due to faults, and the operation reliability and safety of the elevator are improved.

Furthermore, the lifting platform is hinged to the top end of the lifting sliding plate, and the lifting sliding plate is vertically provided with a supporting leg for supporting the lifting platform. Lifting platform is articulated with lifting slide for lifting platform can fold to parallel with lifting slide in the transportation, can expand again during the use to be perpendicular with lifting slide, reduces the thickness of lifting machine, improves the convenience of transportation.

Furthermore, an upper pedal platform is fixed at the top end of the guide beam. The upper pedal platform is used for manual operation walking, and operability of the elevator is improved.

Furthermore, the driving unit comprises a motor, a speed reducer and a driving shaft which are sequentially connected along the horizontal direction, two ends of the driving shaft are rotatably connected to the driving base, the driving base is fixed at the bottom of the guide beam, and the driving chain wheel is fixed on the driving shaft.

Furthermore, a protective cover is arranged outside the driving chain wheel, and a chain through hole for the chain to pass through is formed in the protective cover. The safety cover prevents workers from being hurt by touching the driving chain wheel in rotation, and the safety is improved.

The utility model has the advantages that: the lifting platform can be precisely guided in the lifting process through the arranged guide beam, so that the lifting process is more stable; the anti-falling device can prevent the falling of the lifting platform caused by chain breakage or insufficient driving/failure, and ensures the reliability and safety of the operation of the elevator.

Drawings

Fig. 1 is a perspective view of an electric hoist.

Fig. 2 is a perspective view of the elevation slide plate of fig. 1.

Fig. 3 is a rear view of the elevator slide of fig. 1.

Fig. 4 is a sectional view taken along a-a in fig. 3.

Fig. 5 is a sectional view taken in the direction B-B in fig. 3.

Fig. 6 is a perspective view of the automatic tensioning device of fig. 1.

Fig. 7 is a perspective view of the driving unit of fig. 1.

Fig. 8 is a perspective view of the driven unit of fig. 1.

Wherein, 1, a guide beam; 11. a slide bar; 2. a lifting slide plate; 21. a chain connecting block; 22. a directional guide wheel; 221. an annular groove; 23. an eccentric guide wheel; 231. an eccentric shaft; 24. a support leg; 3. a lifting platform; 4. a chain; 41. a drive sprocket; 42. a driven sprocket; 5. an automatic tensioning device; 51. a tension wheel; 52. tensioning the swing arm; 53. a tensioning seat; 54. a pull rod; 55. a pressure spring; 56. a pressure spring baffle plate; 57. locking the nut; 6. a limiting device; 7. a drive unit; 71. a motor; 72. a speed reducer; 73. a drive shaft; 74. a drive base; 75. a protective cover; 751. a chain via hole; 8. a driven unit; 9. the anti-falling device; 91. an anti-falling beam; 92. hanging holes; 93. the anti-falling hook is arranged on the hook; 94. a tension spring; 95. a pin shaft; 10. an upper deck platform.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes will be apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all inventions contemplated by the present invention are protected.

As shown in fig. 1, the electric hoist includes a vertically arranged guide beam 1, a lifting slider 2 is slidably arranged on the guide beam 1, a lifting platform 3 is connected on the lifting slider 2, the lifting slider 2 is fixed on a chain 4, the chain 4 is engaged and connected to a driving sprocket 41 and a driven sprocket 42 respectively arranged at the bottom end and the top end of the guide beam 1, the driving sprocket 41 is connected to a driving unit 7, the driven sprocket 42 is connected to a driven unit 8, and a falling prevention device 9 is arranged on the lifting slider 2. The engagement of the chain and the chain wheel means that a whole chain which is connected into a ring is sleeved on the driving chain wheel and the driven chain wheel and is respectively engaged, the driving chain wheel drives the chain to rotate, and the driven chain wheel changes the transmission direction.

The lifting platform 3 is hinged to the top end of the lifting sliding plate 2, and the lifting sliding plate 2 is vertically provided with a support leg 24 for supporting the lifting platform 3, so that the lifting platform 3 can be turned and folded during transportation and turned and opened during use. An upper-layer pedal platform 10 is fixed at the top end of the guide beam 1.

A chain 4 can be fixed in the middle of the lifting sliding plate 2, and the top end and the bottom end of the chain 4 are respectively meshed with the driven sprocket 42 and the driving sprocket 41 in a sleeved mode. The left side and the right side of the lifting slide plate 2 are respectively provided with a guide beam 1 for guiding.

Also can be provided with a chain 4 respectively at the left end and the right-hand member of lift slide 2, every chain 4's the outside all corresponds and is provided with a guide beam 1, and every guide beam 1's bottom and top all are provided with drive sprocket 41 and driven sprocket 42, and two drive sprockets 41 are by drive unit 7 synchronous drive, and two driven sprocket 42 are connected on driven unit 8. The chain 4 is a special hoisting chain with the safety coefficient more than 5 times.

As shown in fig. 1 to 5, one end of each of the lifting skids 2 is slidably connected to the corresponding guide beam 1 through a directional guide wheel 22, and the other end of each of the lifting skids 2 is slidably connected to the corresponding guide beam 1 through an eccentric guide wheel 23. The inner sides of the two guide beams 1 are fixed with slide bars 11 along the vertical direction, the cross sections of the slide bars 11 are trapezoidal, annular grooves 221 with trapezoidal cross sections are formed in the directional guide wheel 22 and the eccentric guide wheel 23 along the circumference, and the annular grooves 221 are clamped on the slide bars 11 in a clearance mode. The guide roller 22 and the eccentric guide roller 23 rotate during the movement in the vertical direction along the slide bar 11. The directional guide wheel 22 is rotationally connected to a central shaft through a bearing, and the central shaft is fixed on the lifting sliding plate 2; the eccentric guide wheel 23 is rotatably connected by means of bearings to an eccentric shaft which is fixed to the lifting slide 2.

The lifting slide plate 2 is fixedly connected with the chain 4 through the chain connecting block 21, the anti-falling device 9 comprises an anti-falling beam 91 which is arranged at the rear side of the chain 4 in parallel, hanging holes 92 are distributed on the anti-falling beam 91 at intervals, and the hanging holes 92 are circular holes. The middle part of the anti-falling hook 93 is pivotally connected to the chain connecting block 21, the top end of the anti-falling hook 93 is clamped on the chain 4 through a pin shaft 95, one end of a tension spring 94 is connected to the pin shaft 95, and the other end of the tension spring 94 is obliquely and downwardly connected to the lifting sliding plate 2. The tension spring 94 is in tension.

As shown in fig. 1 and 6, an automatic tensioning device 5 is disposed on the chain 4, the automatic tensioning device 5 includes a tensioning wheel 51 pressed on the chain 4, the tensioning wheel 51 is rotatably connected to a tensioning swing arm 52 through a bearing, a middle portion of the tensioning swing arm 52 abuts against a tensioning seat 53, one end of the tensioning swing arm 52 away from the tensioning wheel 51 is connected to a pull rod 54, and a compression spring 55 is sleeved on the pull rod 54. One end of the pressure spring 55 is pressed on the tensioning seat 53, the other end of the pressure spring is pressed on the pressure spring baffle 56, one end, far away from the pressure spring 55, of the pressure spring baffle 56 is tightly abutted through a locking nut 57, and the pressure spring 55 is in a compression state. The lower end of the tension shoe 53 is attached to a mounting mechanism of the hoist, such as a mounting bracket, mounting beam or mounting shoe, by threaded fasteners. The tensioning swing arm 52 is forced to swing upwards by the elastic force of the pressure spring 55, so that the tensioning wheel 51 compresses the chain 4, and the tensioning moment is adjustable.

The top and the bottom of guide beam 1 all are provided with stop device 6. Specifically, a mechanical limiting device is fixed at the top end and the bottom end of the guide beam 1, the mechanical limiting device is a rigid limiting block, and a proximity sensor is further arranged at the bottom end of the guide beam 1 and serves as a zero return detection device.

As shown in fig. 7, the driving unit 7 includes a motor 71, a reducer 72, and a driving shaft 73 connected in sequence in a horizontal direction, both ends of the driving shaft 73 are rotatably connected to the driving base 74, the driving base 74 is fixed to the bottom of the guide beam 1, and the driving sprocket 41 is fixed to the driving shaft 73. A guard 75 is provided outside the drive sprocket 41, and a chain passing hole 751 through which the chain 4 passes is provided on the guard 75. The motor 71 may be a servo motor, a stepping motor, or a three-phase asynchronous motor. The reducer 72 may be a planetary gear reducer or a worm gear reducer. The drive housing 74 is mounted by threaded fasteners to a mounting mechanism of the hoist, such as a mounting bracket, mounting beam or mounting block.

As shown in fig. 8, the driven unit 8 includes a driven shaft supported on the driven machine base through a bearing, two driven sprockets 42 are fixedly sleeved on the driven shaft, the driven sprockets 42 are covered with a driven protective cover, and the two driven sprockets 42 are axially positioned at intervals through a driven shaft sleeve. The driven machine base is mounted on a mounting mechanism of the hoist, such as a mounting frame, a mounting beam or a mounting base, by a threaded fastener.

The operation process of the electric hoist comprises the following steps:

when the material is lifted in high altitude, a lifting signal is triggered, the electric lifter can be automatically started to start lifting, the whole lifting speed process is divided into three stages of acceleration lifting, uniform lifting and deceleration stopping, and three-stage speeds can be independently adjusted, so that the purpose of stable lifting is realized. The lifting speed can be infinitely adjustable within a range, a plurality of lifting speeds can be set to meet different lifting requirements, a gravity sensor is configured, and the lifting speed is automatically matched and called when the lifting load is detected.

And after the lifting is in place, the lifting is automatically stopped, and the motor is braked. The in-place signal realizes automatic in-place stop through a servo motor running position mode, and can also realize in-place detection and feedback control of motor stop through a servo motor running speed mode. Waiting for unloading, after the unloading is finished, triggering a descending signal, and automatically descending the elevator at a no-load speed to return to zero.

The triggering and lifting signal can adopt two modes of automatic triggering and manual triggering, and the automatic triggering needs to be combined with automatic feedback triggering such as a gravity sensor and a photoelectric sensor; manual triggering is realized in a button control mode and can be remotely controlled in a wireless mode; after a lifting signal is triggered, the servo motor is started to drive the planetary reducer and the chain wheel to rotate, so that the chain is driven to move linearly upwards, and the lifting slide plate and the lifting platform are driven to lift. Triggering the falling signal is the same.

Claims

1. The utility model provides an electric elevator, its characterized in that, pilot beam (1) including vertical setting, it is provided with lifting slide (2) to slide on pilot beam (1), be connected with lift platform (3) on lifting slide (2), lifting slide (2) are fixed in on chain (4), chain (4) meshing connection is in setting up respectively on the drive sprocket (41) and the driven sprocket (42) on pilot beam (1) bottom and top, drive sprocket (41) are connected on drive unit (7), driven sprocket (42) are connected on driven unit (8), be provided with anti-falling device (9) on lifting slide (2).

2. Electric hoist according to claim 1, characterized in that the left and right ends of the lifting slider (2) are provided with one chain (4) respectively, the outer side of each chain (4) is correspondingly provided with one guide beam (1), the bottom end and the top end of each guide beam (1) are provided with the driving sprocket (41) and the driven sprocket (42), the two driving sprockets (41) are synchronously driven by the driving unit (7), and the two driven sprockets (42) are connected to the driven unit (8).

3. Electric hoist as defined in claim 2, characterized in that one end of the lifting slider (2) is slidably connected to the corresponding guide beam (1) by means of a guide roller (22) and the other end of the lifting slider (2) is slidably connected to the corresponding guide beam (1) by means of an eccentric guide roller (23).

4. The electric hoist of claim 1, characterized in that the lifting slider (2) and the chain (4) are fixedly connected through a chain connecting block (21), the anti-falling device (9) comprises an anti-falling beam (91) which is arranged in parallel at the rear side of the chain (4), hanging holes (92) are distributed on the anti-falling beam (91) at intervals, the middle of the anti-falling hook (93) is pivotally connected to the chain connecting block (21), the top end of the anti-falling hook (93) is connected to the chain (4) through a pin shaft (95), one end of a tension spring (94) is connected to the pin shaft (95), and the other end of the tension spring (94) is obliquely connected to the lifting slider (2) downwards.

5. The electric hoist as claimed in claim 1, characterized in that an automatic tensioning device (5) is disposed on the chain (4), the automatic tensioning device (5) includes a tensioning wheel (51) pressed against the chain (4), the tensioning wheel (51) is rotatably connected to a tensioning swing arm (52), a middle portion of the tensioning swing arm (52) abuts against a tensioning seat (53), one end of the tensioning swing arm (52) away from the tensioning wheel (51) is connected to a pull rod (54), and the pull rod (54) is elastically pressed against the tensioning seat (53).

6. Electric hoist according to claim 1, characterized in that the guide beam (1) is provided with stop means (6) at both its top and bottom ends.

7. Electric hoist according to claim 1, characterized in that the lifting platform (3) is hinged to the top end of the lifting slider (2), and the lifting slider (2) is vertically provided with support legs (24) for supporting the lifting platform (3).

8. Electric hoist as defined in claim 1 or 2, characterized in that an upper step platform (10) is fixed to the top end of the guide beam (1).

9. The electric hoist as claimed in claim 1, characterized in that the drive unit (7) comprises a motor (71), a reducer (72) and a drive shaft (73) connected in sequence in the horizontal direction, both ends of the drive shaft (73) are rotatably connected to a drive base (74), the drive base (74) is fixed to the bottom of the guide beam (1), and the drive sprocket (41) is fixed to the drive shaft (73).

10. The electric hoist as claimed in claim 9, characterized in that a protective cover (75) is provided outside the drive sprocket (41), and a chain passing hole (751) through which the chain (4) passes is provided on the protective cover (75).