Lifting rod screw rod support transmission mechanism

Abstract

This invention relates to the field of lifting equipment technology, specifically to a lifting rod lead screw support transmission mechanism, including a base, a transmission mechanism, a drive mechanism, a lifting mechanism, and an adjustment component. The transmission mechanism includes a first sprocket, a second sprocket, a transmission chain, a first bearing, a bearing cover, and a lead screw. The drive mechanism drives the second sprocket to rotate, and the second sprocket drives the lead screw on the first sprocket to rotate via the transmission chain. The rotation of the lead screw drives the lifting mechanism to rise and fall. When the lifting mechanism tilts during operation, the lifting mechanism pushes a force onto the inner ring of the first bearing. The inner ring of the first bearing transmits the force to the outer ring of the first bearing through multiple balls, and then to the base. The bearing cover applies downward and inward pressing forces to the outer ring of the first bearing, achieving force balance with the upward and inward pushing forces from the center of the base. Through the above actions, the problem of excessive swing amplitude of the lead screw during lifting and falling is solved.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment technology, and in particular to a lifting rod screw support transmission mechanism. Background Technology

[0002] In traditional lead screw driven lifting rods, the lead screw assembly and transmission mechanism are mostly designed separately. The lower part of the lead screw is connected to the transmission box through the lead screw seat. The transmission box uses pulley or gear transmission. The support assembly and transmission mechanism are placed in a sealed box for waterproofing and lubrication.

[0003] However, this type of lead screw assembly requires two bearings, one above and one below, to fix the lead screw and prevent it from having large axial movement and radial sway. The transmission box also needs two bearings, one above and one below, to support the gears or pulleys. With this structure, the bearings, lead screw seats, and transmission box cover all occupy vertical space, resulting in a large closing height of the lifting rod and a small extension ratio. At the same time, this arrangement requires high precision in the installation position of the lead screw assembly and the transmission box. If the installation position precision is not met, the lead screw will move and swing significantly during the lifting process, causing abnormal noise. Summary of the Invention

[0004] The purpose of this invention is to provide a lifting rod lead screw support transmission mechanism, which aims to solve the problem of excessive swing amplitude of existing lead screws during lifting.

[0005] To achieve the above objectives, the present invention provides a lifting rod lead screw support transmission mechanism, including a base, a transmission mechanism, a drive mechanism, a lifting mechanism, and an adjustment component. The transmission mechanism is disposed within the base, the drive mechanism is disposed on one side of the base and connected to the transmission mechanism, the lifting mechanism is disposed on one side of the base and connected to the transmission mechanism, and the adjustment component is disposed on the side of the base near the transmission mechanism.

[0006] The transmission mechanism includes a first sprocket, a second sprocket, a transmission chain, a first bearing, a bearing cap, and a lead screw. The first sprocket is rotatably connected to the base and located on one side of the base. The second sprocket is disposed on one side of the adjusting assembly. The transmission chain is sleeved on the first sprocket and also on the second sprocket. The outer ring of the first bearing is fixedly connected to the base, and the inner ring of the first bearing is fixedly connected to the first sprocket. The lead screw is fixedly connected to the inner ring of the first bearing and also to the first sprocket. The bearing cap is fixedly connected to the base and located on the side of the base near the first bearing. The lead screw is fixedly connected to the first sprocket and also to the inner ring of the first bearing.

[0007] The transmission mechanism further includes multiple fixing screws, which pass through the base and are fixedly connected to the bearing cover.

[0008] The adjusting assembly includes a connecting plate, a bearing housing, a second bearing, and an adjusting screw. The connecting plate is fixedly connected to the base and located on one side of the base. The bearing housing is fixedly connected to the connecting plate and located on one side of the connecting plate. The outer ring of the second bearing is fixedly connected to the bearing housing, and the inner ring of the second bearing is fixedly connected to the second sprocket. The adjusting screw passes through the connecting plate and is threadedly connected to the base.

[0009] The connecting plate has an elongated hole, which is located on one side of the connecting plate.

[0010] The base has a drainage hole located on one side of the base.

[0011] The first bearing and the second bearing are any one of four-point contact ball bearings, slewing bearings, and crossed roller bearings.

[0012] This invention discloses a lifting rod lead screw support transmission mechanism. The base provides installation conditions for the transmission mechanism, the drive mechanism, the lifting mechanism, and the adjustment component. The drive mechanism drives the second sprocket to rotate, and the second sprocket drives the first sprocket to rotate via the transmission chain. The rotation of the first sprocket drives the lead screw to rotate, and the rotation of the lead screw drives the lifting mechanism to rise and fall. When the lifting mechanism tilts due to external force during operation, the lifting mechanism pushes the force downward along the lead screw to the inner ring of the first bearing. The inner ring of the first bearing is transmitted to the outer ring of the first bearing through multiple balls. The outer ring of the first bearing is transmitted to the base through the bearing cover and the end face of the outer ring. At the same time, the bearing cover applies downward and inward pressing forces to the outer ring of the first bearing, which balances the upward and inward pushing forces of the center of the base. Through the above actions, resistance against shaft tilting is generated, thereby solving the problems of excessive swing amplitude and axial movement of existing lead screws during lifting and falling. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a structural diagram of the lifting boom.

[0015] Figure 2 This is a schematic diagram of a lifting rod lead screw support transmission mechanism according to the present invention.

[0016] Figure 3 This is a cross-sectional view of a lifting rod lead screw support transmission mechanism according to the present invention.

[0017] 1-Transmission mechanism, 2-Drive mechanism, 3-Lifting mechanism, 4-Base, 5-First bearing, 6-Bearing cover, 7-First sprocket, 8-Transmission chain, 9-Screw, 10-Second bearing, 11-Second sprocket, 12-Bearing seat, 13-Connecting plate, 14-Adjusting assembly, 15-Fixing screw, 16-Adjusting screw, 17-Elongated hole, 18-Drainage hole. Detailed Implementation

[0018] Please see Figures 1-3 The present invention provides a lifting rod lead screw support transmission mechanism, including a base 4, a transmission mechanism 1, a drive mechanism 2, a lifting mechanism 3, and an adjustment component 14. The transmission mechanism 1 is disposed in the base 4, the drive mechanism 2 is disposed on one side of the base 4 and connected to the transmission mechanism 1, the lifting mechanism 3 is disposed on one side of the base 4 and connected to the transmission mechanism 1, and the adjustment component 14 is disposed on the side of the base 4 close to the transmission mechanism 1.

[0019] The transmission mechanism 1 includes a first sprocket 7, a second sprocket 11, a transmission chain 8, a first bearing 5, a bearing cover 6, and a lead screw 9. The first sprocket 7 is rotatably connected to the base 4 and is located on one side of the base 4. The second sprocket 11 is disposed on one side of the adjusting assembly 14. The transmission chain 8 is sleeved on the first sprocket 7 and on the second sprocket 11. The outer ring of the first bearing 5 is fixedly connected to the base 4, and the inner ring of the first bearing 5 is fixedly connected to the first sprocket 7. The lead screw 9 is fixedly connected to the inner ring of the first bearing 5 and is also fixedly connected to the first sprocket 7. The bearing cover 6 is fixedly connected to the base 4 and is located on the side of the base 4 near the first bearing 5. The lead screw 9 is fixedly connected to the first sprocket 7 and is also fixedly connected to the inner ring of the first bearing 5.

[0020] In this embodiment, the base 4 provides installation conditions for the transmission mechanism 1, the drive mechanism 2, the lifting mechanism 3, and the adjustment component 14. The drive mechanism 2 drives the second sprocket 11 to rotate. The second sprocket 11 drives the first sprocket 7 to rotate through the transmission chain 8. The rotation of the first sprocket 7 drives the lead screw 9 to rotate. The rotation of the lead screw 9 drives the lifting mechanism 3 to lift. When the lifting mechanism 3 tilts due to external force during operation, the lifting mechanism 3 pushes the force downward along the lead screw 9 to the inner ring of the first bearing 5. The inner ring of the first bearing 5 is transmitted to the outer ring of the first bearing 5 through multiple balls. The outer ring of the first bearing 5 is transmitted to the base 4 through the bearing cover 6 and the end face of the outer ring of the first bearing 5. At the same time, the bearing cover 6 applies downward and inward pressing forces to the outer ring of the first bearing 5, which balances the upward and inward pushing forces of the center of the base 4. Through the above actions, resistance to shaft tilt is generated, thereby solving the problem of excessive swing amplitude and axial movement of the lead screw 9 during lifting.

[0021] Furthermore, the transmission mechanism 1 also includes a plurality of fixing screws 15, which pass through the base 4 and are fixedly connected to the bearing cover 6 respectively.

[0022] In this embodiment, the stability between the bearing cover 6 and the base 4 can be improved by using multiple fixing screws 15.

[0023] Furthermore, the adjusting assembly 14 includes a connecting plate 13, a bearing seat 12, a second bearing 10, and an adjusting screw 16. The connecting plate 13 is fixedly connected to the base 4 and located on one side of the base 4. The bearing seat 12 is fixedly connected to the connecting plate 13 and located on one side of the connecting plate 13. The outer ring of the second bearing 10 is fixedly connected to the bearing seat 12, and the inner ring of the second bearing 10 is fixedly connected to the second sprocket 11. The adjusting screw 16 passes through the connecting plate 13 and is threadedly connected to the base 4.

[0024] In this embodiment, the connecting plate 13 is fastened to the base 4, and the adjusting screw 16 connects the connecting plate 13 to the second sprocket 11 through the elongated hole 17. After long-term use, the length of the transmission chain 8 increases, so the adjusting screw 16 is loosened, and the drive mechanism 2 and the second sprocket 11 are moved in the opposite direction. Then the adjusting screw 16 is fastened to the connecting plate 13 to realize the sprocket distance adjustment.

[0025] Furthermore, the connecting plate 13 has an elongated hole 17, which is located on one side of the connecting plate 13.

[0026] In this embodiment, the preload of the transmission mechanism 1 can be adjusted through the elongated hole 17.

[0027] Furthermore, the base 4 has a drainage hole 18, which is located on one side of the base 4.

[0028] In this embodiment, water that has seeped into the base 4 and water generated by condensation can be discharged through the drainage hole 18.

[0029] The first bearing 5 and the second bearing 10 are any one of four-point contact ball bearings, slewing bearings, crossed roller bearings, deep groove ball bearings, tapered roller bearings, and angular contact bearings; preferably, any one of four-point contact ball bearings, slewing bearings, and crossed roller bearings.

[0030] This invention features a simple structure, reduces the closed height of the lifting rod, and solves problems such as excessive swing amplitude of the existing lead screw during lifting, non-compact axial structure, large closed height of the lifting rod, and small telescopic ratio.

[0031] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A lifting rod lead screw support transmission mechanism, characterized in that, It includes a base, a transmission mechanism, a drive mechanism, a lifting mechanism, and an adjustment component. The transmission mechanism is disposed within the base, the drive mechanism is disposed on one side of the base and connected to the transmission mechanism, the lifting mechanism is disposed on one side of the base and connected to the transmission mechanism, and the adjustment component is disposed on the side of the base near the transmission mechanism. The transmission mechanism includes a first sprocket, a second sprocket, a transmission chain, a first bearing, a bearing cover, and a lead screw. The first sprocket is rotatably connected to the base and located on one side of the base. The second sprocket is disposed on one side of the adjusting assembly. The transmission chain is sleeved on the first sprocket and also on the second sprocket. The outer ring of the first bearing is fixedly connected to the base, and the inner ring of the first bearing is fixedly connected to the first sprocket. The lead screw is fixedly connected to the inner ring of the first bearing and also fixedly connected to the first sprocket. The bearing cover is fixedly connected to the base and located on the side of the base near the first bearing. The lead screw is fixedly connected to the first sprocket and also fixedly connected to the inner ring of the first bearing. The transmission mechanism also includes a plurality of fixing screws, which pass through the base and are fixedly connected to the bearing cover.

2. The lifting rod lead screw support transmission mechanism as described in claim 1, characterized in that, The adjustment assembly includes a connecting plate, a bearing housing, a second bearing, and an adjusting screw. The connecting plate is fixedly connected to the base and located on one side of the base. The bearing housing is fixedly connected to the connecting plate and located on one side of the connecting plate. The outer ring of the second bearing is fixedly connected to the bearing housing, and the inner ring of the second bearing is fixedly connected to the second sprocket. The adjusting screw passes through the connecting plate and is threadedly connected to the base.

3. The lifting rod lead screw support transmission mechanism as described in claim 2, characterized in that, The connecting plate has an elongated hole on one side of the connecting plate.

4. The lifting rod lead screw support transmission mechanism as described in claim 1, characterized in that, The base has a drainage hole located on one side of the base.

5. The lifting rod lead screw support transmission mechanism as described in claim 2, characterized in that, The first bearing and the second bearing are any one of four-point contact ball bearings, slewing bearings, and crossed roller bearings.

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