A toothed rigid chain and a transmission device
By designing a quiet, smooth-transmission, long-stroke toothed rigid chain and transmission device, the problems of environmental cleanliness, smooth operation, noiselessness, and high-frequency and high-speed use of villa stairs have been solved, achieving efficient and stable transmission effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- QINGDAO CHOHO IND CO LTD
- Filing Date
- 2026-06-03
- Publication Date
- 2026-07-21
Smart Images
Figure CN122429201A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of chain drive technology, specifically relating to a toothed rigid chain and a transmission device. Background Technology
[0002] To facilitate movement between floors, villas often require the installation of elevators. In the villa elevator industry, drive systems include hydraulic and screw-type elevators. Villa elevators require cleanliness, smooth operation, low noise, easy maintenance, and high-frequency / high-speed operation. However, current technology cannot simultaneously meet all these requirements. Hydraulic villa elevators suffer from drawbacks such as hydraulic oil leaks leading to environmental pollution and slow lifting speeds. Screw-type villa elevators cannot operate at high frequencies and speeds and are difficult to inspect and maintain regularly. Traditional pin-tooth rigid chains generate significant vibration and noise during engagement, affecting the elevator's riding experience. Summary of the Invention
[0003] To overcome the shortcomings of existing technologies, this invention discloses a toothed rigid chain and a transmission device. The purpose is to provide a quiet, smooth, long-stroke toothed rigid chain, and the transmission device equipped with this toothed rigid chain can achieve smooth, noiseless, and long-stroke transmission. Simultaneously, it solves the problems of small stroke, high noise, cumbersome maintenance, and significant pollution associated with hydraulic and screw drives.
[0004] To achieve the above objectives, the technical solution of the present invention is as follows: A toothed rigid chain includes a toothed chain body composed of a toothed chain plate, a pin, an outer roller, a washer, and a retaining ring. The toothed chain plate includes a connecting part and two chain plate teeth integrally connected to the bottom end of the connecting part. When the toothed chain body is straightened, the adjacent connecting parts limit each other. The toothed chain body constitutes a rigid chain that can only be bent on one side.
[0005] Preferably, the connecting part is a rectangular plate structure, with a tooth groove formed between the two chain plate teeth. The tooth groove has an arc transition, and the bottom ends of the chain plate teeth and the four corners of the connecting part are rounded. A connecting hole is provided at the root of each chain plate tooth and at the bottom of the connecting part.
[0006] Preferably, the toothed chain body includes several interlocking chain links, each chain link including several chain plates arranged side by side, the chain plates of adjacent chain links intersecting and interlocking, and adjacent chain links being connected by a pin passing through a connecting hole at the intersection. The outer end of the pin is provided with an outer roller, and the pin end outside the outer roller is interference-fitted with a retaining ring. A washer is provided on the pin between the outer roller and the outermost chain plate.
[0007] Preferably, among adjacent chain links, the number of chain plates in the first chain link is N, the number of chain plates in the second chain link is N-1, and the end of each chain plate in the second chain link intersects between the ends of adjacent chain plates in the first chain link. After being connected by a pin, the chain plate teeth corresponding to the same pin together form a tooth structure for meshing with the sprocket.
[0008] Preferably, the tooth structure is a straight tooth structure that cooperates with a straight tooth sprocket, or a helical tooth structure that cooperates with a helical tooth sprocket, or a herringbone tooth structure that cooperates with a herringbone tooth sprocket.
[0009] Preferably, the chain plate in the middle of the toothed structure is improved into a guide plate structure, and the sprocket is provided with a guide groove that cooperates with the guide plate structure.
[0010] A transmission device for a toothed rigid chain includes a toothed rigid chain, a transmission box, a sprocket, and a drive mechanism. The transmission box has an input port and an output port on both sides of its upper end. A U-shaped guide plate is provided inside the transmission box, with its two free ends respectively connecting to the input port and the output port. A sprocket is located inside the U-shaped guide plate, with its central shaft rotatably connected to two side walls of the transmission box at both ends, one end of which is connected to the drive mechanism. The toothed rigid chain is arranged along the U-shaped guide rail and meshes with the sprocket. One end of the toothed rigid chain extends outward from the input port, and the other end extends outward from the output port. The inner edge of the U-shaped guide rail rolls in cooperation with an outer roller.
[0011] Preferably, the driving mechanism is a motor, and wear-resistant blocks that slide in cooperation with the back of the toothed rigid chain are respectively provided at both ends of the side wall of the transmission box.
[0012] A design method for helical tooth chain plates and herringbone chain plates in a toothed rigid chain transmission device includes: (1) Design method of helical tooth chain plate: According to the helix angle of the helical tooth sprocket that the helical tooth chain plate needs to be adapted to, on the basis of the original chain plate teeth, the two sides of each chain plate tooth are moved to the left or right by a certain distance according to the angle of the helix angle, and an inclined surface is constructed at the part that meshes with the gear, so that the toothed chain plate constitutes a separate helical tooth chain plate element, and several stacked helical tooth chain plate elements constitute the whole helical tooth chain plate; that is, after the multiple helical tooth chain plate elements of the toothed rigid chain are stacked, the central helical tooth chain plate element With the same meshing position as the original chain plate teeth, the two sides of the chain plate teeth of the two adjacent helical tooth chain plate elements one are moved to the left or right by a distance x, respectively. The two adjacent helical tooth chain plate elements two located outside the two helical tooth chain plate elements one are moved to the left or right by a distance 2x, and so on. Since the chain plate teeth of the helical tooth chain plate elements and the meshing part of the helical tooth sprocket form an inclined surface that matches the teeth of the helical tooth sprocket, after multiple helical tooth chain plate elements are stacked, the toothed rigid chain forms an integral meshing inclined surface. The helix angle is 5°-15°. (2) Design method of herringbone chain plate: design the structure of the herringbone toothed sprocket to be meshed. On the basis of several stacked toothed chain plates, the meshing position of the central toothed chain plate and the herringbone toothed sprocket remains unchanged. The toothed chain plates on both sides are designed as oblique toothed chain plate elements that match the shape of the herringbone gear, and thus the whole constitutes a herringbone chain plate.
[0013] The beneficial effects of the toothed rigid chain and transmission device of the present invention are as follows: (1) The toothed rigid chain of the present invention can achieve tooth shapes such as straight teeth, helical teeth, and herringbone teeth by changing the shape of the chain plate and the sprocket. It has a good noise reduction effect and significantly reduces the vibration generated during meshing compared with traditional chains. It can adapt to different working conditions.
[0014] (2) The toothed push chain of the present invention can flexibly adjust the number of chain plates according to the load conditions, without redesigning or manufacturing new chain plates, and can adapt to different load conditions, thus improving economy and shortening the construction period.
[0015] (3) The present invention uses a motor-driven toothed push chain to realize the lifting of the platform. The lifting speed depends on the motor speed and is not limited by the slow hydraulic oil flow rate. Therefore, the lifting speed of the present invention is higher than that of hydraulic and screw drive methods, and can be used in high-frequency and high-speed application scenarios.
[0016] (4) The lifting height of the present invention depends on the length of the lifting guide rail, chain guide rail and rigid chain of the villa ladder. All three are modular. The guide rail is usually spliced into a long whole from multiple sections. The push chain is made up of many chain links and its length is almost unlimited. Therefore, the present invention can achieve a lifting height of tens of meters, which is higher than hydraulic, screw and other drive methods.
[0017] (5) The lifting chain system of the present invention is a purely mechanical transmission system that does not use hydraulic oil and has no risk of polluting the environment. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of the toothed rigid chain of the present invention; Figure 2 This is a top view of the toothed rigid chain of the present invention. Figure 3 This is a three-dimensional structural diagram of the meshing of the toothed rigid chain and the straight toothed sprocket of the present invention; Figure 4 This is a three-dimensional structural diagram of the meshing of the toothed rigid chain and the helical toothed sprocket of the present invention; Figure 5 This is a three-dimensional structural diagram of the invention where the chain plate in the middle of the toothed structure is improved into a guide plate structure that meshes with the sprocket; Figure 6 This is a front view structural diagram of the chain plate of the present invention; Figure 7 A schematic diagram of a herringbone toothed sprocket structure; Figure 8 This is a three-dimensional structural diagram of the meshing of the toothed rigid chain and the herringbone toothed sprocket of the present invention; Figure 9 This is a cross-sectional view of the transmission box. Figure 10 This is a front view of a helical tooth sprocket meshing with a helical tooth rigid chain; Figure 11 A bottom view of the helical tooth chain plate arrangement; Figure 12 A bottom view of the herringbone toothed chain plate arrangement; Figure 13 This is a three-dimensional view of the guide plate structure; Figure 14 The image shows a front view of the oblique toothed chain plate at different stacking positions.
[0019] 1. Toothed chain plate; 2. Pin; 3. Retaining ring; 4. Outer roller; 5. Washer; 6. Straight tooth sprocket; 7. Helical tooth sprocket; 8. Guide plate structure; 9. Guide groove; 10. Herringbone tooth sprocket; 11. Connecting part; 12. Chain plate teeth; 121. Helical tooth chain plate arrangement; 122. Herringbone chain plate arrangement; 123. Inclined surface; 13. Connecting hole; 14. Transmission box; 15. Guide rail plate; 16. Wear-resistant block; 101. First chain link; 102. Second chain link. Detailed Implementation
[0020] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
[0021] The following embodiments should be understood as either explaining a part of the technical content of the present invention individually or combining the embodiments to explain the broader technical content of the present invention.
[0022] In the initial embodiment, the present invention provides a toothed rigid chain, such as Figure 1-9 As shown, the toothed chain body comprises a toothed chain plate 1, a pin 2, an outer roller 4, a washer 5, and a retaining ring 3. The toothed chain plate 1 includes a connecting portion 11 and two chain plate teeth 12 integrally connected to the bottom end of the connecting portion 11. When the toothed chain body is straightened, adjacent connecting portions 11 limit each other, thus forming a rigid chain that can only bend on one side. In this embodiment, the shape of the connecting portion can be designed as needed to ensure that when the toothed chain body is straightened, it can only bend to one side while remaining rigid to the other.
[0023] In a further embodiment, such as Figure 6As shown, the connecting part 11 is a rectangular plate structure, with a tooth groove formed between the two chain plate teeth 12. The tooth groove has an arc transition, and the bottom ends of the chain plate teeth 12 and the four corners of the connecting part 11 are all rounded. A connecting hole 13 is provided at the root of each chain plate tooth 12 and at the bottom of the connecting part 11. This embodiment provides one implementation of the chain plate. The two ends of the connecting part are bearing surfaces. When the toothed rigid chain has heavy load requirements, it is not necessary to redesign and manufacture the toothed rigid chain. The bearing surface between each chain link can be increased by increasing the length of the pin to stack more chain plates, thereby increasing the load-bearing capacity of the entire toothed rigid chain.
[0024] In a further embodiment, such as Figure 1 , 2 As shown, the toothed chain body includes several interlocking chain links. Each chain link includes several chain plates 1 arranged side by side. The chain plates 1 of adjacent chain links intersect and are arranged alternately. Adjacent chain links are connected by a pin 2 passing through a connecting hole 13 at the intersection. An outer roller 4 is provided on the outer end of the pin 2. A retaining ring 3 is interference-fitted on the end of the pin 2 outside the outer roller 4 to prevent axial movement of the outer roller. A shim 5 is provided on the pin 2 between the outer roller 4 and the outermost chain plate 1. In this embodiment, the outer roller is rotatably connected to the pin and is used to contact the guide surface of the transmission box or the guide rail of the villa ladder, providing motion guidance and limiting for the toothed rigid chain, and improving the stability of the toothed rigid chain operation. The retaining ring is located outside the outer roller and is interference-fitted with the pin to prevent axial misalignment of the chain plate and the outer roller. The shim is used to prevent wear between the outer roller and the outer chain plate.
[0025] In a further embodiment, such as Figure 1 , 2 As shown, in adjacent links, the number of chain plates in the first link 101 is N, and the number of chain plates in the second link 102 is N-1 (i.e., combinations such as 4×3, 6×5, 8×7, etc.). Each chain plate 1 end of the second link crosses between the ends of adjacent chain plates 1 of the first link. After being connected by a pin 2, several chain plate teeth corresponding to the same pin 2 together form a toothed structure for meshing with the sprocket. The first and second links of the toothed rigid chain form a rotating pair composed of a pin and a connecting hole, retaining the advantage of the chain being foldable and easy to store.
[0026] In a further embodiment, such as Figure 1-9As shown, the tooth structure can be a straight tooth structure that meshes with the straight tooth sprocket 6, or a helical tooth structure that meshes with the helical tooth sprocket 7 or a herringbone tooth structure that meshes with the herringbone tooth sprocket 10, to improve the overlap ratio when the toothed rigid chain meshes with the sprocket and make the transmission smoother. Several meshing forms are given above. Based on the straight tooth structure, by appropriately modifying the external contour of each set of tooth structures, they can be used in conjunction with the helical tooth sprocket 7 and the herringbone tooth sprocket 10 of a set shape.
[0027] In a further embodiment, such as Figure 5 As shown, in order to prevent axial displacement when the toothed rigid chain meshes with the sprocket, the chain plate in the middle of the toothed structure is improved into a guide plate structure 8, and the sprocket is provided with a guide groove 9 that cooperates with the guide plate structure 8. The guide plate structure provides guidance and alignment for the toothed rigid chain.
[0028] In a further embodiment, such as Figure 9 As shown, a toothed rigid chain transmission device includes a toothed rigid chain, a transmission box 14, a sprocket, and a drive mechanism. The transmission box 14 has an input port (not marked in the figure) and an output port (not marked in the figure) on both sides of its upper end. The transmission box 14 has a U-shaped guide plate (refer to guide plate 15, i.e., a U-shaped guide plate is formed by combining multiple guide plates of different shapes to guide the chain throughout its movement within the transmission box 14). The two free ends of the U-shaped guide plate are respectively connected to the input port and the output port, allowing the chain to smoothly enter and exit the transmission box. A sprocket is provided on the inner side of the U-shaped guide plate. The two ends of the central shaft of the sprocket are rotatably connected to the two side walls of the transmission box 14, with one end connected to the drive mechanism. The toothed rigid chain is arranged along the U-shaped guide rail, with one end extending out of the outside of the input port and the other end extending out of the outside of the output port. The rigid chain located on the outer side moves up and down along the chain guide rail of the villa ladder. The inner edge of the U-shaped guide rail is in rolling cooperation with the outer roller 4.
[0029] Specifically, the drive mechanism is a motor, and wear-resistant blocks 16 are respectively provided at both ends of the side wall of the transmission box 14 to slide in cooperation with the back of the toothed rigid chain.
[0030] In this embodiment, a U-shaped guide rail is provided inside the transmission box. The outer roller of the toothed rigid chain rolls along the U-shaped guide rail, guiding the toothed rigid chain within the box and ensuring tight meshing between the rigid chain and the sprocket. The wear-resistant block inside the transmission box 14 slides against the back of the toothed rigid chain. In the main meshing section between the toothed rigid chain and the sprocket, the toothed rigid chain bears tangential and normal forces along the sprocket's pitch circle. Under the action of the normal force, friction occurs between the back of the chain plate and the side wall of the box. The wear-resistant block prevents direct friction between the back of the chain plate and the side wall of the box, reducing chain plate wear and eliminating friction noise. The wear-resistant block is preferably made of non-metallic wear-resistant materials such as polytetrafluoroethylene (PTFE) or ultra-high molecular weight polyethylene (UHMWPE). For aspects of the transmission box design not described in this embodiment, refer to existing rigid chain or push chain transmission boxes.
[0031] In a further embodiment, such as Figure 1-14 As shown, to improve the overlap ratio when the toothed rigid chain meshes with the sprocket and make the transmission smoother, this invention provides a design method for the helical tooth chain plate and herringbone chain plate in the transmission device of the toothed rigid chain, including: (1) Design method of helical tooth chain plate: According to the helix angle of the helical tooth sprocket that the helical tooth chain plate needs to be adapted to, on the basis of the original chain plate teeth, the two sides of each chain plate tooth are moved to the left or right by a certain distance according to the angle of the helix angle, and an inclined surface 123 is constructed at the part that meshes with the gear, so that the toothed chain plate 1 constitutes a separate helical tooth chain plate element, and several stacked helical tooth chain plate elements constitute the whole helical tooth chain plate; that is, after the multiple helical tooth chain plate elements of the toothed rigid chain are stacked, the central helical tooth chain plate element The meshing position of the component is the same as that of the original chain plate teeth. The two sides of the chain plate teeth of the two adjacent helical tooth chain plate components one are moved to the left or right by a distance x, respectively. The two adjacent helical tooth chain plate components two located outside the two helical tooth chain plate components one are moved to the left or right by a distance 2x, and so on. Since the meshing part of the chain plate teeth of the helical tooth chain plate components and the helical tooth sprocket forms an inclined surface 123 that matches the teeth of the helical tooth sprocket, after multiple helical tooth chain plate components are stacked, the toothed rigid chain forms an integral meshing inclined surface. The helix angle is 5°-15°. (2) Design method of herringbone chain plate: design the structure of the herringbone toothed sprocket to be meshed. On the basis of several stacked toothed chain plates, the meshing position of the central toothed chain plate and the herringbone toothed sprocket remains unchanged. The toothed chain plates on both sides are designed as oblique toothed chain plate elements that match the shape of the herringbone gear, and thus the whole constitutes a herringbone chain plate.
Claims
1. A toothed rigid chain, characterized in that it comprises a toothed chain body consisting of a toothed chain plate, a pin, an outer roller, a washer, and a retaining ring, wherein the toothed chain plate includes a connecting part and two chain plate teeth integrally connected to the bottom end of the connecting part, and when the toothed chain body is straightened, the adjacent connecting parts limit each other, and the toothed chain body constitutes a rigid chain that can only be bent on one side.
2. A toothed rigid chain as described in claim 1, characterized in that, The connecting part is a rectangular plate structure, with a tooth groove formed between the two chain plate teeth. The tooth groove has an arc transition, and the bottom ends of the chain plate teeth and the four corners of the connecting part are rounded. A connecting hole is provided at the root of each chain plate tooth and at the bottom of the connecting part.
3. A toothed rigid chain as described in claim 2, characterized in that, The toothed chain body includes several interlocking chain links. Each chain link includes several chain plates arranged side by side. The chain plates of adjacent chain links intersect and are arranged in an alternating manner. Adjacent chain links are connected by a pin that passes through a connecting hole at the intersection. The outer end of the pin is provided with an outer roller. The pin end outside the outer roller is press-fitted with a retaining ring. A washer is provided on the pin between the outer roller and the outermost chain plate.
4. A toothed rigid chain as described in claim 3, characterized in that, In adjacent chain links, the number of chain plates in the first chain link is N, and the number of chain plates in the second chain link is N-1. The end of each chain plate in the second chain link crosses between the ends of adjacent chain plates in the first chain link. After being connected by a pin, the chain plate teeth corresponding to the same pin together form a tooth structure for meshing with the sprocket.
5. A toothed rigid chain as described in claim 4, characterized in that, The tooth structure is a straight tooth structure that mates with a straight tooth sprocket, a helical tooth structure that mates with a helical tooth sprocket, or a herringbone tooth structure that mates with a herringbone tooth sprocket.
6. A toothed rigid chain as described in claim 5, characterized in that, The chain plate in the middle of the toothed structure is improved into a guide plate structure, and the sprocket is provided with a guide groove that cooperates with the guide plate structure.
7. A transmission device for a toothed rigid chain, characterized in that, The device includes a toothed rigid chain, a transmission box, a sprocket, and a drive mechanism as described in any one of claims 1-6. The transmission box has an input port and an output port on both sides of its upper end. A U-shaped guide rail plate is provided inside the transmission box. The two free ends of the U-shaped guide rail plate are respectively connected to the input port and the output port. A sprocket is provided on the inner side of the U-shaped guide rail plate. The two ends of the central shaft of the sprocket are rotatably connected to the two side walls of the transmission box, one end of which is connected to the drive mechanism. The toothed rigid chain is arranged along the U-shaped guide rail and meshes with the sprocket. One end of the toothed rigid chain extends out of the outside of the input port, and the other end extends out of the outside of the output port. The inner edge of the U-shaped guide rail is in rolling cooperation with the outer roller.
8. The transmission device of a toothed rigid chain as described in claim 7, characterized in that, The drive mechanism is a motor, and wear-resistant blocks that slide in contact with the back of the toothed rigid chain are respectively provided at both ends of the side wall of the transmission box.
9. The design method of the helical tooth chain plate and the herringbone chain plate in the transmission device of the toothed rigid chain as described in claim 8, comprising: (1) Design method of helical tooth chain plate: According to the helix angle of the helical tooth sprocket that the helical tooth chain plate needs to be adapted to, on the basis of the original chain plate teeth, the two sides of each chain plate tooth are moved to the left or right by a certain distance according to the angle of the helix angle, and an inclined surface is constructed at the part that meshes with the gear, so that the toothed chain plate constitutes a separate helical tooth chain plate element, and several stacked helical tooth chain plate elements constitute the whole helical tooth chain plate; that is, after the multiple helical tooth chain plate elements of the toothed rigid chain are stacked, the central helical tooth chain plate element With the same meshing position as the original chain plate teeth, the two sides of the chain plate teeth of the two adjacent helical tooth chain plate elements one are moved to the left or right by a distance x, respectively. The two adjacent helical tooth chain plate elements two located outside the two helical tooth chain plate elements one are moved to the left or right by a distance 2x, and so on. Since the chain plate teeth of the helical tooth chain plate elements and the meshing part of the helical tooth sprocket form an inclined surface that matches the teeth of the helical tooth sprocket, after multiple helical tooth chain plate elements are stacked, the toothed rigid chain forms an integral meshing inclined surface. The helix angle is 5°-15°. (2) Design method of herringbone chain plate: design the structure of the herringbone toothed sprocket to be meshed. On the basis of several stacked toothed chain plates, the meshing position of the central toothed chain plate and the herringbone toothed sprocket remains unchanged. The toothed chain plates on both sides are designed as oblique toothed chain plate elements that match the shape of the herringbone gear, and thus the whole constitutes a herringbone chain plate.