Tail tensioning mechanism with buffering and sealing functions

Abstract

The tail tensioning mechanism with the buffering and sealing functions comprises a tensioning lead screw, a sliding sleeve, an adjusting nut, a spring and a sealing cover, the sliding sleeve is arranged on an installation base in a sliding and penetrating mode, the tensioning lead screw in threaded connection with the sliding sleeve is arranged in the sliding sleeve, the adjusting nut in threaded connection with the sliding sleeve is arranged on the sliding sleeve, and the spring is arranged on the adjusting nut. A spring is arranged on the sliding sleeve between the adjusting nut and the mounting base in a sleeving mode, a sealing cover connected with the sliding sleeve in a sliding and sealing mode is arranged at the upper end of the mounting base, and an anti-disengaging step is arranged at the upper end of the sliding sleeve. Compared with the prior art, the chain transmission stability and safety can be achieved, and the sealing performance of the elevator is improved.

Description

[Technical field]

[0001] The utility model relates to the technical field of hoists, in particular to a tail tensioning mechanism with buffering and sealing functions. [Background technology]

[0002] Bucket elevator is mainly composed of head casing, middle casing, tail, running parts (chain, bucket), drive device and tensioning device.

[0003] As the main equipment for material transportation, the transmission structure of the elevator is mostly chain drive and belt drive. Generally, in order to ensure the stability and safety of the equipment transmission process, a tensioning device is set, that is, one side of the transmission is set as the active end, and the tensioning of the overall transmission is achieved by applying a load to the active end. However, the tensioning structure is prone to ash leakage and is prone to damage to structures such as the screw rod when adjusting the tension, and the adjustment is unstable. Therefore, a tail tensioning mechanism with buffering and sealing functions is needed to greatly improve its sealing performance and have a buffering effect, so as to control the tensioning of the elevator chain drive more stably and safely, achieve the stability and safety of the chain drive, and improve the sealing performance of the elevator. [Contents of the utility model]

[0004] The purpose of the utility model is to solve the problems in the prior art and to provide a tail tensioning mechanism with buffering and sealing functions, which can achieve the stability and safety of the chain drive and improve the sealing of the hoist.

[0005] To achieve the above-mentioned purpose, the utility model proposes a tail tensioning mechanism with buffering and sealing functions, including a tensioning screw, a sliding sleeve, an adjusting nut, a spring and a sealing cover. The sliding sleeve is slidably inserted into the mounting seat, and the sliding sleeve is provided with a tensioning screw threadedly connected to the sliding sleeve. The sliding sleeve is provided with an adjusting nut threadedly connected to the sliding sleeve. A spring is provided on the sliding sleeve between the adjusting nut and the mounting seat. The upper end of the mounting seat is provided with a sealing cover slidingly and sealingly connected to the sliding sleeve, and the upper end of the sliding sleeve is provided with an anti-slip step.

[0006] Preferably, the sealing cover comprises a sealing seat, a sealing gland and a packing, the sealing seat is provided with a packing for sealing with the sliding sleeve, and the upper end of the sealing seat is provided with a sealing gland for pressing and fixing the packing.

[0007] Preferably, a screwing head is provided at the upper end of the tensioning screw rod.

[0008] Preferably, the circumferential surface of the anti-slip step is provided with two symmetrically arranged anti-rotation planes.

[0009] The beneficial effects of the utility model are as follows: the utility model is achieved by sliding a sleeve through the mounting seat, a tensioning screw is provided in the sleeve and is threadedly connected to the sleeve, an adjusting nut is provided on the sleeve and is threadedly connected to the sleeve, a spring is provided on the sleeve between the adjusting nut and the mounting seat, a sealing cover is provided at the upper end of the mounting seat and is slidingly and sealingly connected to the sleeve, and an anti-slip step is provided at the upper end of the sleeve. Compared with the prior art, the utility model can achieve the stability and safety of the chain drive and improve the sealing of the hoist.

[0010] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0011] Figure 1 It is a structural schematic diagram of a tail tensioning mechanism with buffering and sealing functions of the utility model;

[0012] Figure 2 It is a cross-sectional view of a tail tensioning mechanism with buffering and sealing functions of the utility model;

[0013] Figure 3 It is a schematic diagram of the connection between the utility model and the tail transmission device.

[0014] In the figure: 1-tensioning screw, 2-sliding sleeve, 3-adjusting nut, 4-spring, 5-sealing cover, 6-mounting seat, 7-anti-slip step, 8-twist head, 9-anti-rotation plane, 51-sealing seat, 52-sealing gland, 53-packing. [Specific implementation method]

[0015] See also Figure 1 , Figure 2 , Figure 3 The utility model discloses a tail tensioning mechanism with buffering and sealing functions, comprising a tensioning screw 1, a sleeve 2, an adjusting nut 3, a spring 4 and a sealing cover 5. The sleeve 2 is slidably inserted into a mounting seat 6. A tensioning screw 1 threadedly connected to the sleeve 2 is provided inside the sleeve 2. An adjusting nut 3 threadedly connected to the sleeve 2 is provided on the sleeve 2. A spring 4 is sleeved on the sleeve 2 between the adjusting nut 3 and the mounting seat 6. A sealing cover 5 slidably and sealingly connected to the sleeve 2 is provided at the upper end of the mounting seat 6. An anti-slip step 7 is provided at the upper end of the sleeve 2.

[0016] The sealing cover 5 comprises a sealing seat 51 , a sealing gland 52 and a packing 53 . The sealing seat 51 is provided with the packing 53 for sealing with the sliding sleeve 2 . The upper end of the sealing seat 51 is provided with a sealing gland 52 for pressing and fixing the packing 53 .

[0017] A screwing head 8 is provided at the upper end of the tensioning screw rod 1 .

[0018] The circumferential surface of the anti-slip step 7 is provided with two symmetrically arranged anti-rotation planes 9 .

[0019] Working process of this utility model:

[0020] The utility model discloses a tail tensioning mechanism with buffering and sealing functions. During the working process, during the overall operation of the hoist, the tail tensioning structure is installed on the upper side of the tensioning movable door 11 of the tail housing 10. By rotating the tensioning screw 1, the sleeve position of the sliding sleeve 2 and the tensioning screw 1 is changed to change the tension of the chain. The tension of the spring 4 in the tail tensioning structure is mainly used to realize the control of the tension of the chain by the tensioning screw 1. By rotating the adjustment nut 3, the tightness of the spring 4 is changed, so that the sliding sleeve 2 moves up and down, driving the tensioning screw 1, so that the tail transmission device 12 moves up and down along the slide rail 13 as a whole, thereby changing the tension of the chain. At the same time, due to the elasticity of the spring 4, it plays a buffering role during adjustment, so that the structure has a certain flexibility in controlling the tension of the chain, avoiding damage to the tensioning screw 1. During the actual operation of the hoist, the tension of the tail tensioning mechanism will also change with the change of the chain transmission, thereby improving the stability of operation.

[0021] The tensioning screw rod 1 is sleeved with the sliding sleeve 2, and the tensioning screw rod 1 is fully threaded, so the relative position of the sleeved tensioning screw rod 1 and the sliding sleeve 2 can be adjusted, and the threaded connection strength is high; the sliding sleeve 2 is sleeved with the spring 4, because the sliding sleeve 2 can move up and down, adding the compression spring 4 can limit the moving distance of the sliding sleeve 2 and play a buffering role;

[0022] The sealing structure composed of the sealing gland 52, the packing 53 and the sealing seat 51 can prevent the sliding sleeve from leaking dust during the movement and play a sealing role.

[0023] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A tail tensioning mechanism with buffering and sealing functions, characterized in that: The invention comprises a tensioning screw rod (1), a sliding sleeve (2), an adjusting nut (3), a spring (4) and a sealing cover (5); the sliding sleeve (2) is slidably inserted into a mounting seat (6); a tensioning screw rod (1) threadedly connected to the sliding sleeve (2) is arranged inside the sliding sleeve (2); an adjusting nut (3) threadedly connected to the sliding sleeve (2) is arranged on the sliding sleeve (2); a spring (4) is sleeved on the sliding sleeve (2) between the adjusting nut (3) and the mounting seat (6); a sealing cover (5) slidably and sealingly connected to the sliding sleeve (2) is arranged at the upper end of the mounting seat (6); and an anti-slip step (7) is arranged at the upper end of the sliding sleeve (2).

2. A tail tensioning mechanism with buffering and sealing functions as claimed in claim 1, characterized in that: The sealing cover (5) comprises a sealing seat (51), a sealing gland (52) and a packing (53); the sealing seat (51) is provided with a packing (53) for sealing with the sliding sleeve (2); the upper end of the sealing seat (51) is provided with a sealing gland (52) for pressing and fixing the packing (53).

3. A tail tensioning mechanism with buffering and sealing functions as claimed in claim 1, characterized in that: The upper end of the tensioning screw rod (1) is provided with a screwing head (8).

4. A tail tensioning mechanism with buffering and sealing functions as claimed in any one of claims 1 to 3, characterized in that: The circumferential surface of the anti-slip step (7) is provided with two symmetrically arranged anti-rotation planes (9).

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