Slow descent control mechanism of lifter

Abstract

The utility model discloses a slow descending control mechanism of a lifter, and belongs to the technical field of lifters. The technical problem of slow descending operation control of the lifter is solved. According to the technical scheme, the device is characterized by comprising a rotating shaft on a rope winding wheel in the lifter, the rotating shaft extends out of a shell of the lifter, and the device further comprises a control base, a control knob, a threaded base, a one-way clutch shaft and a friction block; the control base is fixed to the shell, the one-way clutch shaft is fixed to the rotating shaft, the one-way clutch shaft and an inner cavity of the control base form a clutch cavity allowing the friction block to be embedded and move, the inner wall of the control base and the threaded base are assembled through threads, the threaded base and the control knob are fixed, and the threaded base achieves loosening and tightening of the side wall of the friction block through a thread structure on the control base. The device has the effects of simplicity and convenience in operation and safety and reliability in slow descending operation.

Description

Technical Field

[0001] The present application relates to the technical field of lifters, and in particular to a slow-descent control mechanism for lifters. Background Art

[0002] At present, the existing lifters are used for lifting and lowering heavy objects. To lift goods by ropes, a lifter tool is required. For example, in the prior patent application number: CN202321461845.1, it is disclosed that the rope body can pass through the rope reel, and by driving the rope reel to rotate, the lifter can be lifted up and down on the rope body, and the heavy object can be fixed on the outer shell of the lifter, thereby realizing the lifting function of the goods.

[0003] This lifter includes a shell, a rope reel is arranged inside the shell, the rope reel is used to reel in the rope, the rope reel is provided with a rotating shaft, the rotating shaft of the rope reel extends out of the shell, the rotating shaft can generally allow an electric drill tool to be inserted, and the rotating shaft is driven forward or reversely by starting the electric drill tool to realize the rotation of the rope reel to realize up and down rope climbing and lifting.

[0004] It is found that during the operation of the above structure, the lifter descends very quickly, which is dangerous without braking. Therefore, it is necessary to control its descent. Utility Model Content

[0005] In view of the above-mentioned shortcomings (problems) of the prior art, in order to be able to slowly lower the lifter, the present application provides a slow-lowering control mechanism for the lifter.

[0006] To achieve the above objectives and other related objectives, this application adopts the following technical solutions:

[0007] A slow-descent control mechanism for an elevator, comprising a rotating shaft on a rope reel in the elevator, the rotating shaft extending out of a housing of the elevator, and further comprising a control seat, a control knob, a threaded seat, a one-way clutch shaft, and a friction block;

[0008] The control seat is fixed on the outer shell, the one-way clutch shaft is assembled on the rotating shaft and forms a clutch cavity with the inner cavity of the control seat for the friction block to be embedded and movable, the inner wall of the control seat is assembled with the threaded seat through threads, the threaded seat and the control knob are fixed, and the threaded seat realizes tightening and loosening of the side wall of the friction block through the threaded structure on the control seat.

[0009] Optionally, the one-way clutch shaft includes a ring body and limbs, the ring body is assembled on the rotating shaft, multiple limbs are arranged and evenly distributed around the circumference of the ring body, and fan-shaped friction blocks are placed between adjacent limbs; when the rotating shaft rotates in one direction, the friction blocks are not driven, and when the rotating shaft rotates in the opposite direction, the friction blocks are driven through the one-way clutch shaft.

[0010] Optionally, the ring body is assembled on the rotating shaft via an overrunning clutch, the overrunning clutch and the rotating shaft are assembled in a key connection manner, and the ring body is sleeved on the overrunning clutch.

[0011] Optionally, a wear-resistant ring is provided on the inner wall of the control seat, and the friction block rubs against the inner wall of the wear-resistant ring under the centrifugal force.

[0012] Optionally, a first clamping block is provided on the outer circumference of the control seat, and a second clamping block is provided on the inner wall of the control knob, and the first clamping block and the second clamping block limit the rotation stroke in the circumferential direction.

[0013] Optionally, a plurality of either the first block or the second block are provided to form a limiting path.

[0014] Optionally, a sealing ring is sleeved on the outer wall of the control seat, and the sealing ring is located between the outer wall of the control seat and the inner wall of the control knob.

[0015] In summary, the present application includes at least one of the following beneficial technical effects:

[0016] 1. When the rope reel reverses, the shaft rotates, driving the one-way clutch shaft to rotate as well. Then the one-way clutch shaft moves the friction block. The friction block moves outward under the action of centrifugal force until it fits on the inner wall of the threaded seat. At this time, the friction resistance provided by the friction block can effectively reduce the speed of the shaft rotation and realize the function of slow descent.

[0017] 2. During the slow-descent operation, you can also adjust the position of the threaded seat by rotating the control knob. The squeezing force of the threaded seat on the friction block can further adjust the resistance, thereby adjusting the speed of the slow-descent.

[0018] 3. The operation of slow descent is simple and convenient, thus improving the safety and reliability of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;

[0020] Figure 2 It is a structural exploded diagram of an embodiment of the present application;

[0021] Figure 3 is a structural explosion diagram of an embodiment of the present application from another perspective;

[0022] Figure 4 is a rear view of an embodiment of the present application;

[0023] Figure 5 yes Figure 4 Section view at AA.

[0024] Description of main reference numerals:

[0025] 1. Rope reel; 2. Rotating shaft; 3. Housing; 4. Control seat; 5. Control knob; 6. Threaded seat; 7. One-way clutch shaft; 71. Ring body; 72. Limb; 8. Friction block; 9. Clutch chamber; 10. Wear-resistant ring; 11. Block 1; 12. Block 2; 13. Sealing ring; 14. Overrunning clutch. DETAILED DESCRIPTION

[0026] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0027] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0028] The specific implementation methods of the present application will be further described below in conjunction with the accompanying drawings. Example

[0029] The embodiment of the present application discloses a slow-descent control mechanism for an elevator, including a rotating shaft 2 on a rope reel 1 in the elevator, the rotating shaft 2 can be on the rope reel 1, or can be implemented by other drive conversion. The rotating shaft 2 extends out of the housing 3 of the elevator, so that other tools such as electric drills can drive the rotating shaft 2 to rotate.

[0030] Reference Image Figure 1 , Figure 2 and Figure 3 The core of the solution of the present application lies in: a control seat 4, a control knob 5, a threaded seat 6, a one-way clutch shaft 7, and a friction block 8.

[0031] Combination Figure 4 and Figure 5 The control seat 4 is fixed on the housing 3, and the one-way clutch shaft 7 is assembled on the rotating shaft 2 and forms a clutch cavity 9 with the inner cavity of the control seat 4 for the friction block 8 to be embedded in the movable. When the rotating shaft 2 rotates in one direction, the friction block 8 is not driven, and when the rotating shaft 2 rotates in the opposite direction, the friction block 8 is driven through the one-way clutch shaft 7.

[0032] Based on the assembly relationship between the one-way clutch shaft 7 and the rotating shaft 2, it can also be selected that the ring body 71 is fixed to the rotating shaft 2 through the overrunning clutch 14, the overrunning clutch 14 and the rotating shaft 2 are assembled in a key connection manner, and the ring body 71 is sleeved on the socket and fastened, or fixed in a key connection manner. The advantage of doing so is that the assembly parts can be processed separately. Of course, it is also possible to design them as one. Specifically, in this scheme, preferably, the one-way clutch shaft 7 includes a ring body 71 and a limb 72, the ring body 71 is fastened to the rotating shaft 2, and the limb 72 is provided in multiple and evenly distributed around the circumference of the ring body 71, and there are three limbs 72, and fan-shaped friction blocks 8 are placed between adjacent two limbs 72, and there are three friction blocks 8. The fan-shaped friction blocks 8 are for achieving reliable friction contact.

[0033] The inner wall of the control seat 4 is assembled with the threaded seat 6 through threads, the threaded seat 6 is fixed to the control knob 5, and the threaded seat 6 can loosen or tighten the side wall of the friction block 8 through the threaded structure on the control seat 4. The control knob 5 rotates, so that the threaded seat 6 rotates synchronously, and approaches and clings to the side wall of the friction block 8 under the action of the threaded structure, thereby increasing the friction resistance to achieve slow descent or even braking (stopping).

[0034] In order to prevent the inner wall of the control seat 4 from being worn by the friction block 8, other materials need to be used for isolation. The inner wall of the control seat 4 is provided with a wear-resistant ring 10, which is made of stainless steel. The friction block 8 is rubbed on the inner wall of the wear-resistant ring 10 by the centrifugal force. The friction block 8 can be made of rubber or other materials.

[0035] A block 11 is provided on the outer circumference of the control seat 4, and a block 2 12 is provided on the inner wall of the control knob 5. Blocks 11 and 12 are used to limit the rotational stroke in the circumferential direction. Multiple blocks 11 or 12 are provided to form a limiting path. For example, two blocks 11 are provided on the circumference to divide the circular path into two parts (two paths of equal length are also possible). For the sake of illustration, an example is given: a large arc and a small arc (path). When block 2 12 is placed on the large arc path, its stroke path is the large arc, and when it is placed on the small arc path, it is the small arc. Similarly, block 11 and block 2 12 can be interchanged with each other. Based on the above-mentioned design principle (concept), there are multiple design schemes, and the stroke length range is selected according to actual needs.

[0036] In this preferred embodiment, a solution is selected in which two clamping blocks 11 and two clamping blocks 12 are respectively provided to achieve the limit of the starting point and the end point of the rotation position to prevent the control knob 5 from rotating excessively.

[0037] A sealing ring 13 is sleeved on the outer wall of the control seat 4, and the sealing ring 13 is located between the outer wall of the control seat 4 and the inner wall of the control knob 5. This can prevent dust from entering and improve work reliability. The block 11 also prevents the sealing ring 13 from falling off.

[0038] During the operation of this scheme, when the rope winding wheel 1 reverses, the rotating shaft 2 rotates, thereby driving the one-way clutch shaft 7 to rotate as well, and then the one-way clutch shaft 7 moves the friction block 8, and the friction block 8 moves outward under the action of centrifugal force until the friction block 8 fits on the inner wall of the threaded seat 6. When there is a wear-resistant ring 10, the friction block 8 rubs against the wear-resistant ring 10. At this time, the friction resistance provided by the friction block 8 can effectively reduce the rotation speed of the rotating shaft 2, thereby realizing the function of slow descent.

[0039] Furthermore, in the slow-descent operation, the position of the threaded seat 6 can be adjusted by rotating the control knob 5, and the squeezing force of the threaded seat 6 on the friction block 8 can further adjust the resistance, thereby adjusting the slow-descent speed. It can be seen that the structure is simple and convenient for the slow-descent operation, thereby improving the safety and reliability of the operation.

[0040] The above embodiments are only illustrative of the principles and effects of the present application, and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A slow-descent control mechanism for an elevator, comprising a rotating shaft (2) on a rope reel (1) in the elevator, the rotating shaft (2) extending out of a housing (3) of the elevator, characterized in that: It also includes a control seat (4), a control knob (5), a threaded seat (6), a one-way clutch shaft (7), and a friction block (8); The control seat (4) is fixed on the housing (3), the one-way clutch shaft (7) is assembled on the rotating shaft (2) and forms a clutch cavity (9) with the inner cavity of the control seat (4) for the friction block (8) to be embedded in the movable clutch cavity (9), the inner wall of the control seat (4) and the threaded seat (6) are assembled by threads, the threaded seat (6) and the control knob (5) are fixed, and the threaded seat (6) realizes the tightening and loosening of the side wall of the friction block (8) through the threaded structure on the control seat (4).

2. The slow-descent control mechanism of the lifter according to claim 1, characterized in that: The one-way clutch shaft (7) comprises a ring body (71) and limbs (72), wherein the ring body (71) is assembled on the rotating shaft (2), a plurality of limbs (72) are arranged and evenly distributed around the ring body (71), and fan-shaped friction blocks (8) are placed between adjacent limbs (72); When the rotating shaft (2) rotates in one direction, the friction block (8) is not driven; when the rotating shaft (2) rotates in the opposite direction, the friction block (8) is driven via the one-way clutch shaft (7).

3. The slow-descent control mechanism of the lifter according to claim 2, characterized in that: The ring body (71) is mounted on the rotating shaft (2) via an overrunning clutch (14); the overrunning clutch (14) and the rotating shaft (2) are assembled in a key connection manner, and the ring body (71) is sleeved on the overrunning clutch (14).

4. The slow-descent control mechanism of the lifter according to claim 2, characterized in that: The inner wall of the control seat (4) is provided with a wear-resistant ring (10), and the friction block (8) rubs against the inner wall of the wear-resistant ring (10) under the influence of centrifugal force.

5. The slow-descent control mechanism of the lifter according to claim 1, characterized in that: A first clamping block (11) is arranged on the outer circumference of the control seat (4), and a second clamping block (12) is arranged on the inner wall of the control knob (5). The first clamping block (11) and the second clamping block (12) are used to limit the rotation stroke in the circumferential direction.

6. The slow-descent control mechanism of the lifter according to claim 5, characterized in that: A plurality of either the first block (11) or the second block (12) is provided to form a limiting path.

7. The slow-descent control mechanism for a lifter according to any one of claims 1 to 6, characterized in that: A sealing ring (13) is sleeved on the outer wall of the control seat (4), and the sealing ring (13) is located between the outer wall of the control seat (4) and the inner wall of the control knob (5).

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