CN-224207037-U - Overlap joint structure of involute toothed chain, guide rail and straight rack

CN224207037UCN 224207037 UCN224207037 UCN 224207037UCN-224207037-U

Abstract

The utility model relates to an overlap joint structure of an involute toothed chain, a guide rail and a straight toothed bar, which comprises a backrest frame, a seat frame and a manipulator, wherein the backrest frame guide rail on the backrest frame is provided with a first rack, the seat frame guide rail on the seat frame is provided with a second rack, the toothed chain is connected between the backrest frame guide rail and the seat frame guide rail, the toothed chain comprises a toothed plate, the toothed plates at the head end and the tail end of the toothed chain are respectively and fixedly connected with the seat frame guide rail and the backrest frame guide rail through toothed chain fixing pieces, a bottom plate in the toothed chain is fixedly connected with the bottom surface of the seat frame guide rail or the backrest frame guide rail, a baffle plate extends out from the position between the first rack or the second rack and is fixedly connected with at least two points of the toothed plates at the head end and the tail end of the toothed chain, a sprocket in a manipulator walking wheel assembly is aligned with the axial tooth shape of the toothed chain, and a straight gear in the manipulator walking wheel assembly is aligned with the axial tooth shape of the first rack or the second rack. The utility model has the beneficial effects that the superposition of the index circle of the toothed chain and the index circle of the chain wheel in the travelling wheel assembly and the superposition of the axial tooth form position can be ensured.

Inventors

XU GANG
YIN GANG
Lei Chuanmao
WU FENGZHANG
LUO XIANSHUN
XIE JICHUN
WU JIANQIANG

Assignees

浙江豪中豪健康产品有限公司

Dates

Publication Date: 20260508
Application Date: 20250107

Claims (5)

1. The utility model provides an overlap joint structure of involute toothed chain and guide rail, straight rack, includes back frame (1), seat frame (2) and manipulator (4), back frame (1) installs on seat frame (2), back frame (1) both sides are equipped with back frame guide rail (10), seat frame (2) both sides are equipped with seat frame guide rail (20), be equipped with two first racks (11) on back frame guide rail (10), be equipped with two second racks (21) on seat frame guide rail (20), be connected with profile of tooth chain (3) between first racks (11) and second racks (21), manipulator (4) can realize walking with first racks (11) or profile of tooth chain (3) or second racks (21) looks meshing through walking wheel sub-assembly (5), profile of tooth chain (3) include a plurality of sprocket (31), characterized in that sprocket (31) at both ends of profile of tooth chain (3) are respectively with seat frame (20) and back frame guide rail (10) between fixed part (321) and seat frame guide rail (321) through profile of tooth chain (321) and base plate (20) fixed connection in order to locate base plate (32) fixed on seat frame (20) bottom plate (322, the baffle plate (322) extends out from between the two first racks (11) or the two second racks (21) and is fixedly connected with at least two points of the sprocket plates (31) at the head end and the tail end of the toothed chain (3), the sprocket at the middle part of the travelling wheel assembly (5) is aligned with the axial tooth form of the toothed chain (3), and the spur gears at the two sides of the travelling wheel assembly (5) are aligned with the axial tooth form of the first racks (11) or the second racks (21).
2. The overlapping structure of the involute toothed chain and the guide rail and the straight toothed bar according to claim 1, wherein two first toothed portions (311) are respectively arranged at the head and the tail of each toothed plate (31), the first toothed portions (311) of the adjacent two toothed plates (31) at the head and the tail along the length direction of the toothed chain (3) are in staggered hinge fit, each first toothed portion (311) is provided with a first pin hole (312), the toothed plates (31) are mutually hinged through the first pin holes (312), two second toothed portions (313) with the same shape as the first toothed portions (311) are arranged at the top of the baffle plate (322), second pin holes (314) are respectively arranged on the second toothed portions (313), the second pin holes (314) are respectively matched with the first pin holes (312) of the toothed plates (31) at the head and the tail ends of the toothed chain (3) to realize fixed connection, two ends of the bottom plate (321) are provided with welding plates (323), and the welding plates (323) are fixed on the bottom of the guide rail (20) or the bottom of the backrest frame (10) through welding.
3. The overlapping structure of the involute toothed chain and the guide rail and the straight toothed bar according to claim 2, wherein the straight gears in the travelling wheel assembly (5) are the integral multiple of the number of teeth of the chain gears (54), and the welding plates (323) can be arranged into 1 group and respectively arranged on the front side surface and the rear side surface of the baffle plate (322) arranged on the bottom plate (321).
4. The overlapping structure of the involute toothed chain and the guide rail and the straight toothed bar according to claim 2, wherein the number of teeth of the straight gear and the number of teeth of the chain gear in the travelling wheel assembly (5) are equal, the number of second toothed portions (313) at the top of the baffle plate (322) can be 3, two second toothed portions (313) are adjacently arranged and form a load-carrying portion (315), the other second toothed portion (313) is staggered with the load-carrying portion (315) and forms a connecting portion (316), and the load-carrying portion (315) and the connecting portion (316) are fixedly embedded in the inner walls of the two first racks (11) or the two second racks (21).
5. The overlapping structure of involute toothed chain and guide rail and straight toothed bar according to claim 4, characterized in that the welding plates (323) can be arranged in 2 groups and are respectively arranged at the bottoms of two sides of the bottom plate (321) where the loading part (315) is arranged and the bottoms of two sides of the bottom plate (321) where the connecting part (316) is arranged.

Description

Overlap joint structure of involute toothed chain, guide rail and straight rack Technical Field The utility model relates to the technical field of massage chairs, in particular to a lap joint structure of an involute toothed chain, a guide rail and a straight rack. Background Along with the continuous progress of science and technology, the design and the function of the massage armchair are more advanced so as to better serve the daily life of people, the development from the initial sitting type function to the leaning type to the 'zero gravity' lying type function is realized, the massage armchair can be flattened into a bed-like development, and the massage experience is more comfortable and personalized, namely the effect of 'extremely stretching' can be met on the massage armchair. The toothed chain used on the massage chair is generally hinged with the straight teeth of the seat frame guide rail or the backrest frame guide rail directly through a pin shaft, however, the manner is easy to cause that the reference circle of the toothed chain and the reference circle of the chain wheel in the travelling wheel can not be overlapped when the massage chair is laid down and raised, so that the condition that the massage manipulator can not walk when passing through the joint section of the toothed chain and the travelling wheel is easy to cause. Disclosure of Invention The technical problem to be solved by the utility model is to provide a lap joint structure capable of ensuring the coincidence of the pitch circle of the toothed chain and the pitch circle of the chain wheel in the travelling wheel assembly and the coincidence of axial tooth-shaped positions aiming at the defects of the prior art. The technical scheme is that the overlap joint structure of the involute toothed chain, the guide rail and the straight toothed bar comprises a backrest frame, a seat frame and a manipulator, wherein the backrest frame is arranged on the seat frame, two sides of the backrest frame are provided with backrest frame guide rails, two sides of the seat frame are provided with seat frame guide rails, two first racks are arranged on the backrest frame guide rails, two second racks are arranged on the seat frame guide rails, a toothed chain is connected between the first racks and the second racks, the manipulator can realize meshing walking with the first racks or the toothed chain or the second racks through a travelling wheel assembly, the toothed chain comprises a plurality of toothed plates, the toothed plates at the front end and the tail end of the toothed chain are respectively fixedly connected with the seat frame guide rails and the backrest frame guide rails through toothed chain fixing pieces, the toothed chain fixing pieces comprise a bottom plate and baffle plates arranged at two sides of the bottom plate, the bottom plate is fixedly connected with the bottom surface of the seat frame guide rails or the backrest frame guide rails, the baffle plates extend out of the two first racks or the two second racks and are connected with at least two toothed shafts at the front end and tail end of the toothed chain, and the toothed chain assembly is aligned with the toothed wheels at the two toothed wheels or the two toothed wheels, and the toothed chain assembly is aligned with the two toothed wheels. By adopting the technical scheme, the baffle plate on the tooth-shaped chain fixing piece is fixed with two tooth pin shafts on the chain tooth plates at the head end and the tail end of the tooth-shaped chain through two points, the tooth-shaped chain fixing piece is welded at the bottom of the seat frame guide rail or the backrest frame guide rail through an ultrasonic welding machine, then the baffle plate extends out from the bottom of the seat frame guide rail or the backrest frame guide rail to between two first racks or two second racks, the chain tooth plates and the tooth-shaped chain can be directly fixed by the pin shafts, the installation is faster because the chain tooth plates are fixed with the bottom of the seat frame guide rail or the backrest frame guide rail, the pin shafts can also pass through the first racks or the second racks firstly, then pass through the baffle plate, finally are hinged with the two points of the chain tooth plates on the tooth-shaped chain, so that the installation is more stable, the tooth-shaped chain fixing pieces in two installation modes can both supply a certain supporting force at the head end and the tail end of the tooth-shaped chain, when the width of the toothed chain is wider, the baffle plate and the toothed plate are fixed at three points or fixed at four points so as to realize stronger supporting force, the toothed chain has stronger bearing force, the installation is more convenient and quicker when the backrest frame is fixed at two points, the toothed chain can be bent or flattened along with the backrest frame when the backrest frame is laid down or is erec