Gear-rack anti-disengaging mechanism of elevator

Abstract

The utility model discloses an elevator gear and rack tooth-disengaging-preventing mechanism which comprises a rack and a climbing gear which are meshed with each other, the rack is installed on a stand column, the climbing gear is installed on a transmission shaft, the transmission shaft is installed at the bottom of a lifting frame, and a climbing motor installed at the bottom of the lifting frame is connected with the transmission shaft through a chain wheel and chain transmission pair. A limiting assembly for preventing the climbing gear from being separated from the rack is arranged and comprises a limiting wheel and a guide wheel which are arranged on the two sides of the stand column respectively; the guide wheel is coaxially mounted on the transmission shaft and is in rolling contact with the corresponding side surface of the stand column; the wheel shaft is installed on the wheel frame, the wheel frame is installed at the bottom of the lifting frame, and the limiting wheel is installed on the wheel shaft and makes rolling contact with the corresponding side face of the stand column. When the lifting frame is used for carrying cargoes to ascend and descend, the climbing gear and the rack are normally meshed and are not blocked, the lifting frame cannot fall off due to tooth disengagement, the safety of equipment is guaranteed, and the requirement of normal production operation is met.

Description

Technical Field

[0001] The utility model relates to the structure of a hoist component, in particular to an anti - tooth - disengaging mechanism for the gear and rack of a hoist. Background Technique

[0002] In the existing intensive storage system, a hoist is often used to realize the up - and - down transmission of goods. For example, the "Self - climbing Pallet Hoist" with the authorization announcement number CN219098633U is a hoist with relatively advanced technology.

[0003] In the technical solution of the "Self - climbing Pallet Hoist", its lifting solution includes limit rollers rotatably connected to each corner of the cargo - carrying frame, a lifting motor fixedly installed at the bottom of the cargo - carrying frame, and a transmission shaft rotatably installed at the bottom of the cargo - carrying frame. The limit rollers are in rolling cooperation with the lifting guide rail. A driving gear is fixedly connected to the output shaft of the lifting motor, a driven gear is fixedly connected to the transmission shaft near the driving gear, and the driving gear and the driven gear are connected by a transmission chain. Lifting gears meshing with the rack are fixedly connected to both ends of the transmission shaft, so as to realize the lifting movement of the cargo - carrying frame.

[0004] The gear - rack is a common mechanical transmission structure. During operation, there is an interaction force between the gear and the rack. Especially when the cargo - carrying frame is heavily loaded, there is a risk of mutual disengagement between the gear and the rack, which poses a hazard to the operation. Content of the Utility Model

[0005] In view of the deficiencies of the prior art, the utility model proposes an anti - tooth - disengaging mechanism for the gear and rack of a hoist.

[0006] The anti - tooth - disengaging mechanism for the gear and rack of a hoist that can solve the problems of the prior art includes a rack and a climbing gear that mesh with each other. The rack is installed on the column, the climbing gear is installed on the transmission shaft, the transmission shaft is installed at the bottom of the lifting frame, and a climbing motor installed at the bottom of the lifting frame is connected to the transmission shaft through a sprocket - chain transmission pair. The difference is as follows:

[0007] 1. A limit component for preventing the climbing gear from disengaging from the rack is provided. The limit component includes limit wheels and guide wheels respectively arranged on both sides of the column.

[0008] 2. The guide wheel is coaxially installed on the transmission shaft and rolls in contact with the corresponding side surface of the column.

[0009] 3. The wheel shaft is installed on the wheel frame, the wheel frame is installed at the bottom of the lifting frame, and the limit wheel is installed on the wheel shaft and rolls in contact with the corresponding side surface of the column.

[0010] Further, the upright column is a vertical H-shaped steel beam, the H-shaped steel beam includes inner and outer wing plates connected by an intermediate web, the rack is installed on the inner wing plate, and the limiting wheel and the guiding wheel are respectively in rolling contact with the two side end faces of the inner wing plate.

[0011] Advantages of the utility model:

[0012] In the structure of the anti-tooth-drop mechanism of the hoist gear rack of the utility model, the limiting component adopts a combination of a limiting wheel and a guiding wheel, so as to ensure the normal meshing of the climbing gear and the rack. The climbing gear and the rack are normally meshed without tooth dropping. When the lifting frame makes ascending and descending movements during loading, the climbing gear and the rack are normally meshed without jamming, and the lifting frame will not fall due to tooth dropping, ensuring the safety of the equipment and meeting the requirements of normal production operations. Description of the drawings

[0013] Figure 1 It is an isometric view from the first perspective of an embodiment of the utility model.

[0014] Figure 2 is Figure 1 the isometric view from the second perspective in the embodiment.

[0015] Figure 3 is Figure 1 , Figure 2 the view from direction A in

[0016] Figure 4 is Figure 3 the top view of

[0017] Drawing number identification: 1, rack; 2, climbing gear; 3, transmission shaft; 4, lifting frame; 5, climbing motor; 6, sprocket chain transmission pair; 7, limiting wheel; 8, guiding wheel; 9, wheel shaft; 10, wheel frame; 11, H-shaped steel beam. Specific embodiments

[0018] The technical solution of the utility model will be further described below in conjunction with the embodiments shown in the drawings.

[0019] The anti-tooth-drop mechanism of the hoist gear rack of the utility model includes a gear rack transmission pair (two pairs in the front and rear are arranged in the middle) that drives the lifting frame 4 to move up and down along the guide rail mechanism arranged at the four corners, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 .

[0020] Taking the front-side gear-rack transmission pair as an example, the gear-rack transmission pair includes a rack 1 and a climbing gear 2 that mesh with each other. The rack 1 is installed on a vertically arranged H-shaped steel beam 11. The H-shaped steel beam 11 includes front and rear wing plates and a middle web plate. Specifically, the rack 1 is installed on the rear wing plate, and the tooth claws of the rack 1 are exposed at the left end of the rear wing plate. The climbing gear 2 is installed at the front shaft end of a transmission shaft 3. The transmission shaft 3 is installed at the bottom of a lifting frame 4 through front and rear bearing assemblies. A climbing motor 5 is installed at the bottom of the lifting frame 4 on the left side of the transmission shaft 3. The climbing motor 5 is connected to the front part of the transmission shaft 3 through a sprocket-chain transmission pair 6, as Figure 1 , Figure 2 , Figure 3 , Figure 4 shown.

[0021] A limit assembly is provided to prevent the climbing gear 2 from disengaging from the rack 1. The limit assembly includes a guide wheel 8 and a limit wheel 7 respectively arranged on the left and right sides of the rear wing plate of the H-shaped steel beam 11: The guide wheel 8 is coaxially installed on the transmission shaft 3 on the front side of the climbing gear 2, and the guide wheel 8 forms a rolling relationship with the left end face of the rear wing plate. Its function is to ensure that the climbing gear 2 and the rack 1 will not be over-engaged to cause jamming of the lifting and lowering movements. The limit wheel 7 is installed on a wheel frame 10 through a wheel shaft 9, and the limit wheel 7 forms a rolling relationship with the right end face of the rear wing plate. Its function is to ensure the normal engagement of the climbing gear 2 and the rack 1 without tooth disengagement. The wheel frame 10 is installed on the bottom of the lifting frame 4, as Figure 1 , Figure 2 , Figure 3 , Figure 4 shown.

[0022] The operation mode of the present utility model is as follows:

[0023] When the hoist needs to lift and lower goods, the climbing motor 5 is started, and the transmission shaft 3 is driven to rotate through the sprocket-chain transmission pair 6. The climbing gears 2 meshing with the corresponding racks 1 at the front and rear ends of the transmission shaft 3 rotate synchronously, thereby driving the lifting frame 4 to move up and down. The guide wheels 8 and the limit wheels 7 arranged on the left and right sides of each H-shaped steel beam 11 respectively limit each other with the rear wing plate to form a limit, so as to ensure perfect engagement of the climbing gear 2 and the rack 1 without tooth disengagement, ensure the normal lifting and lowering operation of the equipment, and ensure the safety performance of the equipment.

Claims

1. A hoist gear rack anti-slip mechanism, comprising a gear rack (1) and a climbing gear (2) meshing with each other, wherein the gear rack (1) is mounted on a column, the climbing gear (2) is mounted on a transmission shaft (3), the transmission shaft (3) is mounted on the bottom of a lifting frame (4), and a climbing motor (5) mounted on the bottom of the lifting frame (4) is connected to the transmission shaft (3) through a sprocket chain transmission pair (6), characterized in that: A limiting assembly is provided to prevent the climbing gear (2) from being separated from the rack (1), and the limiting assembly comprises a limiting wheel (7) and a guide wheel (8) respectively arranged on both sides of the column; The guide wheel (8) is coaxially mounted on the transmission shaft (3) and rolls in contact with the corresponding side surface of the column; The wheel axle (9) is mounted on a wheel frame (10), the wheel frame (10) is mounted on the bottom of the lifting frame (4), and the limiting wheel (7) is mounted on the wheel axle (9) and rolls in contact with the corresponding side surface of the column.

2. The hoist gear rack anti-gear disengagement mechanism according to claim 1, characterized in that: The column is a vertical H-shaped steel beam (11), and the H-shaped steel beam (11) includes inner and outer wing plates connected by an intermediate web plate. The rack (1) is installed on the inner wing plate, and the limiting wheel (7) and the guide wheel (8) are respectively in rolling contact with the end surfaces of both sides of the inner wing plate.

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