Pinion and rack type elevator
By using a combined structure of rack protective shell, gear protective shell and flexible plastic protective belt in the construction elevator, the impact of construction site pollution on gears and racks is solved, extending component life and reducing maintenance costs.
Patent Information
- Application Number
- CN202421759858.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-24
AI Technical Summary
Racks and lift drive gears in existing construction lifts are susceptible to dust, moisture and other contaminants at the construction site, resulting in reduced performance and accelerated wear.
A rack and rack elevator was designed, using rack and rack protective shell and gear protective shell, combined with flexible plastic protective belt, to form a sealed protective structure to effectively isolate key components.
Through the protective structure, the corrosion of dust, moisture and other pollutants is reduced, the service life of gears and racks is extended, maintenance frequency and cost are reduced, and the operation stability in harsh environments is improved.
Smart Images
Figure CN223032774U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of construction equipment, and particularly relates to a rack and pinion elevator. Background Art
[0002] Existing construction elevators are widely used in construction sites for lifting personnel and materials. These elevators generally include wall-attached frames, lifting cars, racks, and lifting drive motors. The racks are installed on the wall-attached frames, while the lifting drive motors are installed on the lifting cars. The lifting drive gears of the motors mesh with the racks to achieve the vertical movement of the lifting cars. However, in the prior art, the racks and lifting drive gears are usually exposed at the construction sites, resulting in the racks and gears being easily affected by dust, moisture, and other construction site pollutants, which may reduce their performance and accelerate wear. Content of the Utility Model
[0003] The utility model aims to provide a rack and pinion elevator that can solve the above problems.
[0004] To solve the above problems, the technical solution adopted by the utility model is as follows:
[0005] The utility model provides a rack and pinion elevator, which includes a wall-attached frame, a lifting car, a rack installed on the wall-attached frame, and a lifting drive motor installed on the lifting car. The lifting drive gear of the lifting drive motor meshes with the rack. The wall-attached frame is provided with a rack protective shell, and the rack protective shell is provided with a strip-shaped installation groove. The rack is installed at the bottom of the strip-shaped installation groove. The lifting car is provided with a gear protective shell, and the lifting drive gear is wrapped in the gear protective shell. The strip-shaped installation groove is provided with guide wheels, and the guide wheels are in rolling fit with a flexible plastic protective belt that closes the notch of the strip-shaped installation groove. The two ends of the flexible plastic protective belt are respectively connected to the top and bottom of the gear protective shell, and the flexible plastic protective belt and the gear protective shell form a closed-loop structure.
[0006] As a further description of the above technical solution: The strip-shaped installation groove is a through groove structure, and the guide wheels are provided at least at both ends of the strip-shaped installation groove.
[0007] As a further description of the above technical solution: A rib is provided on the side of the wall-attached frame facing away from the strip-shaped installation groove. The inner side of the flexible plastic protective belt is provided with a wheel contact surface that is in rolling fit with the guide wheels, and a lubricating and sealing surface that is in sliding fit with the rack protective shell and the rib.
[0008] As a further description of the above technical solution: The lifting car is further provided with a toothed anti-falling device. The anti-falling device gear of the toothed anti-falling device is wrapped in the gear protective shell and meshes with the rack.
[0009] As a further description of the above technical solution: a lubricating oil addition hole whose vertical projection is located at the top of the gear protective housing is provided, and the lubricating oil addition hole is configured with a lubricating oil hole sealing plug.
[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0011] The rack protective housing, the gear protective housing and the flexible plastic protective belt together constitute a protective structure for the gear and the rack, ensuring that the gear and the rack can be protected both in the static and moving states, reducing the erosion of dust, moisture and other pollutants, thereby prolonging the service life of the components; since the key components are effectively isolated, the frequency and difficulty of daily maintenance are reduced, the maintenance cost is lowered, and at the same time the maintenance efficiency is improved; due to the addition of protective measures, the lift can adapt to more severe construction environments, and can maintain stable operation whether it is humid, dusty or under extreme temperature conditions.
[0012] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, specific embodiments of the present utility model are hereinafter given, and in conjunction with the accompanying drawings, the detailed description is as follows. Description of the Drawings
[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0014] Figure 1 is a schematic structural diagram of the rack and pinion type lift described in the embodiment;
[0015] Figure 2 is a schematic structural diagram of the rack and pinion type lift described in the embodiment, in which one flexible plastic protective belt is removed and the corresponding rack is exposed;
[0016] Figure 3 is Figure 2 a partial enlarged view of part A in
[0017] Figure 4 is a schematic diagram of the internal and peripheral structures of the gear protective housing described in the embodiment;
[0018] Figure 5 is a schematic structural diagram of the rack and pinion type lift described in the embodiment, showing its back, and in which one flexible plastic protective belt is removed and the corresponding rib is exposed;
[0019] Figure 6It is a schematic structural diagram of the flexible plastic protective belt described in the embodiment;
[0020] In the figure: 1, wall; 2, wall-attached frame; 3, rack protective shell; 4, flexible plastic protective belt; 41, lubricating and sealing surface; 42, wheel contact surface; 5, gear protective shell; 6, lubricating oil hole sealing plug; 7, lifting drive motor; 8, toothed anti-falling device; 9, lifting car; 10, rack; 11, anti-falling device gear; 12, lubricating oil adding hole; 13, rib; 14, guide wheel; 15, lifting drive gear. Specific embodiments
[0021] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.
[0022] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , this embodiment provides a rack and pinion elevator, including a wall-attached frame 2, a lifting car 9, a rack 10 installed on the wall-attached frame 2, and a lifting drive motor 7 installed on the lifting car 9. The lifting drive gear 15 of the lifting drive motor 7 meshes with the rack 10. The wall-attached frame 2 is provided with a rack protective shell 3, and the rack protective shell 3 is provided with a strip-shaped installation groove. The rack 10 is installed at the bottom of the strip-shaped installation groove; the lifting car 9 is provided with a gear protective shell 5, and the lifting drive gear 15 is wrapped in the gear protective shell 5; the strip-shaped installation groove is provided with a guide wheel 14, and the guide wheel 14 is in rolling cooperation with a flexible plastic protective belt 4 that closes the opening of the strip-shaped installation groove. The two ends of the flexible plastic protective belt 4 are respectively connected to the top and bottom of the gear protective shell 5, and the flexible plastic protective belt 4 and the gear protective shell 5 enclose a closed-loop structure.
[0023] Combined with Figure 2 and Figure 4 as shown, the lifting car 9 is also provided with a toothed anti-falling device 8. The anti-falling device gear 11 of the toothed anti-falling device 8 is wrapped in the gear protective shell 5 and meshes with the rack 10.
[0024] The protection principle of this rack and pinion elevator is as follows:
[0025] When the lifting car 9 is stationary, the flexible plastic protective belt 4, the gear protective shell 5 and the rack protective shell 3 enclose a space with a relatively high sealing degree. The anti-falling device gear 11, the lifting drive gear 15 and the rack 10 are all located in this space, greatly reducing the possibility of external dust, moisture and other construction site pollutants contacting the anti-falling device gear 11, the lifting drive gear 15 and the rack 10.
[0026] During the up-and-down movement of the lifting car 9, the gear protective housing 5 moves up and down together with the lifting car 9. Subsequently, under the pulling action of the gear protective housing 5, the flexible plastic protective belt 4 also moves accordingly. The moving direction of the flexible plastic protective belt 4 is the belt length direction. The guide wheel 14 plays a role in supporting and guiding the flexible plastic protective belt 4. During this process, the flexible plastic protective belt 4, the gear protective housing 5, and the rack protective housing 3 still enclose a space with a relatively high sealing degree. The anti-falling gear 11, the lifting drive gear 15, and the rack 10 are all located in this space.
[0027] In an alternative embodiment of the present utility model, the strip-shaped installation groove is a through groove structure, and guide wheels 14 are provided at least at both ends of the strip-shaped installation groove, as shown in Figure 2 and Figure 5 shown. The through groove structure of the strip-shaped installation groove and the design of the guide wheels 14 at both ends ensure the smooth movement of the flexible plastic protective belt 4, and improve the stability and sealing performance of the elevator operation.
[0028] In an alternative embodiment of the present utility model, in combination with Figure 2 , Figure 4 , Figure 5 and Figure 6 shown, a rib 13 is provided on the side of the wall-attaching frame 2 facing away from the strip-shaped installation groove. The inner side of the flexible plastic protective belt 4 is provided with a wheel contact surface 42 that rolls and mates with the guide wheel 14, and a lubricating and sealing surface 41 that slides and mates with the rack protective housing 3 and the rib 13 (this surface can be coated with lubricating oil to reduce friction); the gear protective housing 5 can also slide and mate on both sides of the rack protective housing 3. This design enables the gears and the rack to always be in a region with a very high sealing degree, and can isolate them from dust, moisture, and other construction site pollutants in the outside world to the greatest extent.
[0029] In an alternative embodiment of the present utility model, as shown in Figure 4 shown, a lubricating oil adding hole 12 whose vertical projection is located on the lifting drive gear 15 is provided at the top of the gear protective housing 5. The lubricating oil adding hole 12 is provided with a lubricating oil hole sealing plug 6. The design of the lubricating oil adding hole 12 and the sealing plug at the top of the gear protective housing 5 facilitates the addition of lubricating oil during maintenance.
[0030] In an alternative embodiment of the present utility model, the flexible plastic protective belt 4 is in clearance fit with the wall-attaching frame 2 and the rack protective housing 3, and the clearance width is less than 5 mm. That is, the flexible plastic protective belt 4, the rack protective housing 3, and the gear protective housing 5 do not seal the gears and the rack in a completely enclosed area, and there are a few gaps. This facilitates making the cross-section of the flexible plastic protective belt 4 into a rectangular structure, reducing the processing cost of the flexible plastic protective belt 4, and this structure and assembly method enable the flexible plastic protective belt 4 not to have sliding friction, and can extend the service life of the flexible plastic protective belt 4.
[0031] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A rack and pinion elevator, comprising a wall-mounted frame (2), a lift car (9), a rack (10) mounted on the wall-mounted frame (2), and a lift drive motor (7) mounted on the lift car (9), wherein a lift drive gear (15) of the lift drive motor (7) is meshed with the rack (10), characterized in that: The wall-mounted frame (2) is provided with a rack protection shell (3), the rack protection shell (3) is provided with a strip-shaped mounting groove, and the rack (10) is installed at the bottom of the strip-shaped mounting groove; the lifting car (9) is provided with a gear protection shell (5), and the lifting drive gear (15) is wrapped in the gear protection shell (5); the strip-shaped mounting groove is provided with a guide wheel (14), and the guide wheel (14) is rollingly matched with a flexible plastic protection belt (4) that closes the notch of the strip-shaped mounting groove, and the two ends of the flexible plastic protection belt (4) are respectively connected to the top and bottom of the gear protection shell (5), and the flexible plastic protection belt (4) and the gear protection shell (5) form a closed loop structure.
2. The rack and pinion elevator according to claim 1, characterized in that: The strip-shaped installation groove is a through groove structure, and the guide wheels (14) are arranged at least at two ends of the strip-shaped installation groove.
3. The rack and pinion elevator according to claim 2, characterized in that: A convex strip (13) is arranged on the side of the wall-mounted frame (2) facing away from the strip-shaped mounting groove, and a wheel contact surface (42) rollingly matched with the guide wheel (14) and a lubricating sealing surface (41) slidingly matched with the rack protective shell (3) and the convex strip (13) are arranged on the inner side of the flexible plastic protective belt (4).
4. The rack and pinion elevator according to claim 1, characterized in that: The lifting car (9) is also provided with a gear-type fall arrester (8), and the fall arrester gear (11) of the gear-type fall arrester (8) is wrapped in the gear protection shell (5) and meshed with the rack (10).
5. The rack and pinion elevator according to claim 1, characterized in that: The top of the gear protection shell (5) is provided with a lubricating oil adding hole (12) whose vertical projection is located on the lifting drive gear (15), and the lubricating oil adding hole (12) is provided with a lubricating oil hole sealing plug (6).