CN219307835U - Foldable elliptical machine - Google Patents

Abstract

The utility model discloses a foldable elliptical machine, which comprises a chassis for supporting the foldable elliptical machine, a body fixed on the chassis, a pedal part hinged with the body and an armrest part arranged above the body. The handrail portion is equipped with coupling assembling in the bottom, the body is equipped with the spread groove of vertical direction at the top, coupling assembling cover is established in the spread groove. When the connecting assembly moves along the connecting groove, the armrest part moves between a first position vertical to the underframe and a second position parallel to the underframe, the armrest part rotates relative to the body, so that the switching between the use state and the folding state is realized. The foldable elliptical machine can be switched between the use state and the folding state through a simple structure, the packaging size can be reduced, the assembly of a user is facilitated, and the loading and unloading time is saved.

Description

Foldable elliptical machine

Technical Field

The utility model relates to the technical field of fitness equipment, in particular to a foldable elliptical machine.

Background

Elliptical machines are emerging fitness equipment which can effectively exercise the heart and lung abilities of users, and can organically combine the movements of arms and legs, thereby coordinating limbs and building bodies. Meanwhile, through the slope design, the impedance adjustment design and the preset movement mode of the elliptical machine, exercise plans of different intensities of users can be met. However, the elliptical machine needs to simultaneously consider the movements of arms and legs, and pedals and armrests are required to be arranged, so that the whole occupied area is large, and the elliptical machine is not beneficial to loading, unloading and transportation.

There is thus a need for improvements and improvements in the art.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present utility model aims to provide a foldable elliptical machine, which aims to solve the problems of overlarge occupation area and inconvenient loading, unloading and transportation of the elliptical machine in the prior art.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a foldable elliptical machine, comprising:

a chassis supporting the foldable elliptical machine;

the body is fixed on the underframe;

the pedal part is hinged with the body;

the handrail portion is arranged above the body, a connecting component is arranged at the bottom of the handrail portion, a connecting groove in the vertical direction is formed in the top of the body, the connecting component is sleeved in the connecting groove, and when the connecting component moves along the connecting groove, the handrail portion moves between a first position perpendicular to the underframe and a second position parallel to the underframe, so that the handrail portion rotates relative to the body.

In one embodiment, the bottom of the armrest portion is provided with an arcuate bottom plate, the top of the body is provided with a top plate adapted to the bottom plate, the bottom plate is in abutment with the top plate to effect the body to support the armrest portion when the armrest portion moves between the first position and the second position.

In one embodiment, the armrest portion comprises:

the handrail part body is arranged above the body;

the first handrail is rotationally connected with the handrail part body, and one end of the first handrail is hinged with the pedal part so as to drive the pedal part to move when the first handrail is pulled;

a second armrest fixed to the armrest portion body;

and the display device is fixed on the top of the armrest part body so as to display current movement data.

In one embodiment, the first handrail is vertically provided with a loop bar, the handrail part body is provided with a rotating bar, and the first handrail is sleeved on the rotating bar through the loop bar, so that the first handrail is rotationally connected with the handrail part body.

In one embodiment, the pedal portion includes:

a first lever hinged with the body;

one end of the second rod is hinged with the first rod, the other end of the second rod is arranged on the underframe and is in sliding connection with the underframe, and the second rod and the first rod form a connecting rod structure;

and one end of the third rod is hinged with the second rod and moves synchronously with the second rod, and the other end of the third rod is hinged with the first handrail so as to drive the pedal part to move when the first handrail is pulled.

In one embodiment, a pedal is provided at the end of the third rod hinged to the second rod for stepping on during use.

In one embodiment, the bottom plate is provided with a first screw hole, and the top plate is provided with a second screw hole at a position corresponding to the first screw hole, so that the body and the armrest part are fixed by using screws when the armrest part is respectively located at the first position and the second position.

In one embodiment, a bayonet is provided at the center of the top plate, a clamping column is provided at the center of the bottom plate, and when the armrest part is located at the first position, the armrest part body is inserted into the bayonet, so as to position the armrest part and the body.

In one embodiment of the present utility model, in one embodiment, the connection assembly includes:

one end of the connecting piece is fixed on the bottom plate;

the screw rod is fixed at the other end of the connecting piece in the horizontal direction and penetrates through the connecting groove;

the rotating sleeve is sleeved on the screw rod and arranged between the screw rod and the connecting groove, so that the connecting assembly rotates when moving along the connecting groove, and sliding friction between the connecting assembly and the connecting groove is avoided.

In one embodiment, the body is provided with a pair of connecting grooves, the connecting grooves are respectively arranged on two sides of the connecting piece, and two ends of the screw rod respectively penetrate through the connecting grooves.

The utility model provides a foldable elliptical machine, which comprises a chassis for supporting the elliptical machine, a body fixed on the chassis, a pedal part hinged with the body and an armrest part arranged above the body. The handrail portion is equipped with coupling assembling in the bottom, the body is equipped with the spread groove of vertical direction at the top, coupling assembling cover is established in the spread groove. When the connecting assembly moves along the connecting groove, the armrest part moves between a first position vertical to the underframe and a second position parallel to the underframe so as to realize the rotation of the armrest part relative to the body. When the armrest part is positioned at the first position, the connecting assembly is positioned at the top of the connecting groove, and the elliptical machine is in a use state and can be used by a user; when the armrest part is located in the second position, the connecting assembly is located at the bottom of the connecting groove, and the foldable elliptical machine is in a folded state, so that the foldable elliptical machine is smaller in overall size and can be conveniently stored and transported. The foldable elliptical machine can be switched between the use state and the folding state through a simple structure, the packaging size can be reduced, the assembly of a user is facilitated, and the loading and unloading time is saved.

Drawings

FIG. 1 is a perspective view of a foldable elliptical machine according to the present utility model;

FIG. 2 is a schematic view of a foldable elliptical machine according to the present utility model;

FIG. 3 is a schematic view of a foldable elliptical machine according to the present utility model in a folded state;

FIG. 4 is an assembled schematic view of a foldable elliptical machine according to the present utility model;

FIG. 5 is a schematic view of a handrail portion of a foldable elliptical machine according to the present utility model;

FIG. 6 is a schematic view of the body and foot rest of the foldable elliptical machine of the present utility model;

fig. 7 is an assembled schematic view of a connecting piece and a connecting groove of the foldable elliptical machine according to the present utility model.

Detailed Description

In order to make the objects, technical solutions and effects of the present utility model clearer and more specific, the present utility model will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It should be noted that, the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "vertical", "horizontal", etc. are directions or positional relationships based on the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the structures to be referred to must have a specific direction or must be constructed in a specific direction, and are not to be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

The utility model provides a foldable elliptical machine, which comprises a chassis for supporting the elliptical machine, a body fixed on the chassis, a pedal part hinged with the body and an armrest part arranged above the body. The handrail portion is equipped with coupling assembling in the bottom, the body is equipped with the spread groove of vertical direction at the top, coupling assembling cover is established in the spread groove. When the connecting assembly moves along the connecting groove, the armrest part moves between a first position vertical to the underframe and a second position parallel to the underframe so as to realize the rotation of the armrest part relative to the body. When the armrest part is positioned at the first position, the connecting assembly is positioned at the top of the connecting groove, and the foldable elliptical machine is in a use state and can be used by a user; when the armrest part is located in the second position, the connecting assembly is located at the bottom of the connecting groove, and the foldable elliptical machine is in a folded state, so that the foldable elliptical machine is smaller in overall size and can be conveniently stored and transported. The elliptical machine can be switched between the use state and the folding state through a simple structure, the packaging size can be reduced, the assembly of a user is facilitated, and the loading and unloading time is saved.

Specifically, as shown in fig. 1 and 2, the foldable elliptical machine of the present utility model includes a body 100, a handrail portion 200, a pedal portion 300, and a bottom frame 400. Wherein the chassis 400 supports the foldable elliptical machine and the body 100 is fixed to the chassis 400. And the armrest part 200 can rotate relative to the body 100, and is switched between a first position perpendicular to the bottom frame 400 and a second position parallel to the bottom frame 400, thereby realizing the foldable function of the elliptical machine.

Specifically, as shown in fig. 2 and 3, the armrest portion 200 includes a first armrest 210, a second armrest 220, an armrest portion body 230, a connection assembly 240, and a display device 250. The armrest portion body 230 supports the entire armrest portion 200, and the first armrest 210, the second armrest 220, the connection assembly 240, and the display device 250 are respectively connected to the armrest portion 200.

Specifically, as shown in fig. 4 and 5, the first handrail 210 is rotatably connected to the handrail portion body 230. As shown in fig. 4 and 5, the first handrail 210 is formed with a sleeve rod 211 vertically, the handrail portion body 230 is extended in a horizontal direction to form a rotating rod 233, the sleeve rod 211 is sleeved on the rotating rod 233, so as to realize the rotational connection between the first handrail 210 and the handrail portion body 230, and the sleeve rod 211 can rotate freely relative to the rotating rod 233. When the armrest portion 200 is located at the first position, the first armrest 210 rotates around the rotation rod 233 to a vertical direction through the loop bar 211, and one end of the first armrest 210 is hinged to the pedal portion 300, so that when a user pulls the first armrest 210, the user drives the pedal portion 300 to synchronously move, and thus, the cooperative movement of the arm and the leg is realized; when the armrest portion 200 is in the second position, the first armrest 210 rotates around the rotation rod 233 to the horizontal direction through the loop bar 211, and the first armrest 210 is separated from the pedal portion 300, so as to form a folded state with smaller volume, reduce the packaging size, save the assembly time, and facilitate transportation.

The second handrail 220 is fixedly connected to the handrail portion body 230, and moves synchronously with the handrail portion body 230. The second armrest 220 remains stationary while the armrest portion 200 is in the first position to provide a stationary grip position for a user to secure the body when he is unfamiliar with using the elliptical machine and cannot achieve cooperative movement of the arms and legs.

The display device 250 is fixed to the top of the armrest portion body 230 and moves synchronously with the armrest portion body 230. The display device 250 is electrically connected to the monitoring module disposed in the body 100, so as to display current movement data of the user in real time, and help the user determine the current exercise state and effect. Optionally, the armrest portion body 230 is hollow, so that the wires connected to the monitor module by the display device 250 can pass through.

Further, as shown in fig. 3 and 4, a bottom of the armrest portion body 230 is provided with a bottom plate 231, and the armrest portion 200 is abutted against the body 100 through the bottom plate 231 to obtain support from the body 100. Further, the bottom plate 231 is an arc-shaped bottom plate, so that the armrest portion 200 is conveniently rotated relative to the body 100, and is switched between the first position and the second position. Further, the bottom plate 231 is provided with a first screw hole 232, so that when the armrest portion 200 is located at the first position and the second position, the armrest portion 200 and the body 100 can be fixed by using screws, which is convenient for a user to assemble and disassemble, and saves time. Alternatively, first screw holes 232 are provided at four corners of the bottom plate 231, respectively, so that the armrest portion 200 is fixed to the body 100 by screws using the first screw holes 232 at different positions when the armrest portion 200 is at the first position and the second position, respectively. Optionally, a hollow clamping column is disposed at the center of the bottom plate 231, so as to assist in positioning the relative position of the armrest portion 200 and the body 100 when the armrest portion 200 is located at the first position, thereby reducing assembly difficulty and saving assembly time.

Further, as shown in fig. 5 and 7, the connection assembly 240 includes a connection member 241, a screw 242, and a rotating sleeve 243. Wherein the connection member 241 is a 7-shaped connection member, and a lateral portion of the connection member 241 is fixed to the bottom plate 231. Preferably, the lateral portion of the connecting member 241 is fixed to the center of the edge of the bottom plate 231. Further, the vertical portion of the connecting member 241 extends downward to a position corresponding to the connecting slot 120 of the body 100, and the screw 242 horizontally passes through the connecting slot 120 and is fixed to the connecting member 241, so as to sleeve the connecting assembly 240 in the connecting slot 120. Further, the rotating sleeve 243 is sleeved on the screw 242, and is disposed at a position corresponding to the connecting groove 120. Preferably, the outer diameter of the rotating sleeve 243 is smaller than the inner diameter of the connecting groove 120, the inner diameter of the rotating sleeve 243 is larger than the outer diameter of the screw 242, and the rotating sleeve 243 rotates synchronously when the connecting assembly 240 moves along the connecting groove 120, so that only rolling friction is generated between the connecting assembly 240 and the connecting groove 120 without sliding friction, friction force is reduced, and assembly and disassembly are more convenient and simple.

When the foldable elliptical machine is in an operating state, the armrest portion 200 is in the first position perpendicular to the bottom frame 400, and at this time, the armrest portion 200 is vertically fixed to the body 100, and the connection assembly 240 is located at the top of the connection slot 120. When the foldable elliptical machine is in a folded state, the armrest portion 200 is in the second position parallel to the bottom frame 400, and the armrest portion 200 is fixed to the body 100 perpendicular to the body 100, and the connection assembly 240 is located at the bottom of the connection slot 120. Through setting up coupling assembling and spread groove, can realize the collapsible function of collapsible elliptical machine to reduce the packing size, practice thrift the time of equipment and dismantlement, convenient transportation.

Further, as shown in fig. 1 and 3, the body 100 is vertically fixed on the bottom frame 400, and a top plate 110 is disposed on top of the body 100, and the top plate 110 is disposed corresponding to the bottom plate 231. The top plate 110 is an arc-shaped top plate, so as to correspond to the bottom plate 231 and abut against the bottom plate 231, thereby providing support for the armrest portion 200, so as to facilitate rotation of the armrest portion 200 relative to the body 100, and switch between the first position and the second position. Further, the first screw hole 232 of the top plate 110 corresponding to the bottom plate 231 is provided with a second screw hole 112, so that the first screw hole 232 corresponds to the second screw hole 112 no matter the armrest portion 200 is located at the first position or the second position, so that the armrest portion 200 is fixed at the first position or the second position by a screw, the assembling and disassembling steps are simple, and the use is convenient for a user.

The top plate 110 is provided with a bayonet 111 at a center corresponding to the bottom plate 231, so as to assist positioning when the armrest portion 200 is located at the first position, thereby reducing assembly difficulty. Preferably, the body 100 is of a hollow structure and is opened through the bayonet 111, so as to allow the electric wires connected with the display device 250 to pass through, and the display device 250 is electrically connected with the monitoring module set in the body 100, so as to display current movement data of a user in real time, and help the user determine the current exercise state and effect.

Further, as shown in fig. 7, a pair of connecting grooves 120 is provided in the vertical direction, the connecting grooves 120 are respectively provided on two sides of the connecting piece 241 in the connecting assembly 240, the screw 242 sequentially passes through the connecting grooves 120, and the rotating sleeves 243 are respectively provided corresponding to two connecting grooves, so that the relative positions of the connecting assembly 240 and the connecting grooves 120 are ensured to be fixed, the connecting assembly 240 is prevented from being blocked in the connecting grooves 120 due to skew, the stability of the foldable elliptical machine in switching the working state and the folding state is improved, and the foldable elliptical machine is convenient for a user to assemble and disassemble.

Further, as shown in fig. 2, 3 and 6, the pedal 300 includes a first rod 310, a second rod 320 and a third rod 330 connected in sequence, and a pedal 350 is fixedly disposed at one end of the third rod 330 away from the body 100, so that a user steps on the foldable elliptical machine to realize coordinated movement of the arms and legs.

Specifically, as shown in fig. 4 and 6, one end of the first rod 310 is hinged to the body 100, the other end of the first rod 310 is hinged to one end of the second rod 320, and the other end of the second rod 320 is disposed on the bottom frame 400 and can slide along the bottom frame 400, so that the first rod 310 and the second rod 320 form a link structure, and when the second rod 320 slides along the bottom frame 400 in a straight line, the first rod 310 rotates relative to the body 100. Optionally, a pulley is provided between the other end of the second lever 320 and the bottom chassis 400, so as to facilitate the movement of the second lever 320 along the bottom chassis 400.

Further, as shown in fig. 4 and 6, the other end of the second lever 320 is hinged to one end of the third lever 330 to move the third lever 330 in synchronization with the second lever 320. Further, the end of the third rod 330 hinged to the second rod 320 is the end far from the body 100, where the pedal 350 is fixedly disposed. Further, the other end of the third rod 330 is hinged to one end of the first armrest 210, so as to enable the pedal 300 to move synchronously when the first armrest 210 is pulled. Therefore, when the foldable elliptical machine is in the working state, the armrest portion 200 is in the first position, and at this time, the armrest portion 200 is connected with the pedal portion 300 through the first armrest 210 and the third lever 330, and when the user pulls the first armrest 210 in the armrest portion 200, the third lever 330 moves along with the first armrest 210, so that the third lever 330 pulls the second lever 320 to slide along the bottom frame 400 in a straight line, and finally drives the first lever 310 to rotate relative to the body 100, and achieves the forward and backward rolling movement of the pedal 350, so as to achieve the coordinated movement of the arm and the leg, and simultaneously exercise the muscles of the arm and the leg.

Optionally, the third rod 330 is detachably hinged to the first armrest 210, when the armrest portion 200 needs to be switched from the first position to the second position, the first armrest 210 is separated from the third rod 330, and the first armrest 210 is rotated to the horizontal direction, so that the folding state of the foldable elliptical machine is not affected, the operation is simple and quick, the assembly and disassembly of the elliptical machine are facilitated, and the assembly and disassembly time is saved.

Further, as shown in fig. 4 and 6, a damping mechanism 130 is provided at the hinge of the first lever 310 and the body 100, so as to increase resistance to the movement of the foot rest 300 following the first armrest 210 of the armrest portion 200, and provide different intensity exercise effects to the user by adjusting the resistance.

Further, a foot pad is provided under the bottom frame 400 to support the foldable elliptical machine and absorb vibration or shaking of the user during exercise, thereby improving the stability of the foldable elliptical machine.

The following describes the usage procedure of the foldable elliptical machine according to the present utility model in detail with reference to specific embodiments:

when the foldable elliptical machine is in a folded state, the armrest portion 200 is in a second position parallel to the bottom frame 400, at this time, the armrest portion 200 is fixed on the body 100 perpendicular to the body 100, and the connection assembly 240 on the armrest portion 200 is located at the bottom of the connection slot 120 on the body 100. At this time, the first armrest 210 in the armrest portion 200 is separated from the pedal portion 300 and rotated to a horizontal state, so that the size of the foldable elliptical machine in the vertical direction is reduced to the greatest extent, and the foldable elliptical machine can be stored in a smaller package, thereby facilitating storage and movement.

When the foldable elliptical machine needs to be switched from the folded state to the use state, the armrest portion 200 is pushed to be turned into the vertical state, the connecting assembly 240 moves along the connecting groove 120, and moves from the bottom of the connecting groove 120 to the top of the connecting groove, so that the armrest portion 200 is synchronously driven to be switched from the second position parallel to the bottom frame 400 to the first position perpendicular to the bottom frame 400, the first armrest 210 is clamped and hinged with the third rod 330 in the pedal portion 300, the armrest portion 200 is fixed with the body 100, the use state of the foldable elliptical machine is realized, and at the moment, a user steps on the pedal 350 of the pedal portion 300, the first armrest 210 is pulled to drive the pedal portion 300 to complete corresponding movement, and the coordinated movement of the arm and the leg is realized in combination with the movement of stepping on the pedal 350. By arranging the connecting assembly 240 and the connecting groove 120 between the armrest portion 200 and the body 100, the folding function of the foldable elliptical machine can be realized, the packaging size can be reduced, the assembly of a user is facilitated, the assembly time is saved, and the use of the user is facilitated.

In summary, the utility model discloses a foldable elliptical machine, which comprises a chassis for supporting the foldable elliptical machine, a body fixed on the chassis, a pedal part hinged with the body, and a handrail part arranged above the body. The handrail portion is equipped with coupling assembling in the bottom, the body is equipped with the spread groove of vertical direction at the top, coupling assembling cover is established in the spread groove. When the connecting assembly moves along the connecting groove, the armrest part moves between a first position vertical to the underframe and a second position parallel to the underframe so as to realize the rotation of the armrest part relative to the body. When the armrest part is positioned at the first position, the connecting assembly is positioned at the top of the connecting groove, and the foldable elliptical machine is in a use state and can be used by a user; when the armrest part is located in the second position, the connecting assembly is located at the bottom of the connecting groove, and the foldable elliptical machine is in a folded state, so that the foldable elliptical machine is smaller in overall size and can be conveniently stored and transported. The foldable elliptical machine can be switched between the use state and the folding state through a simple structure, the packaging size can be reduced, the assembly of a user is facilitated, and the loading and unloading time is saved.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the disclosed embodiments. This utility model is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.

Claims (10)

1. A foldable elliptical machine, comprising:

a chassis supporting the foldable elliptical machine;

the body is fixed on the underframe;

the pedal part is hinged with the body;

the handrail portion is arranged above the body, a connecting component is arranged at the bottom of the handrail portion, a connecting groove in the vertical direction is formed in the top of the body, the connecting component is sleeved in the connecting groove, and when the connecting component moves along the connecting groove, the handrail portion moves between a first position perpendicular to the underframe and a second position parallel to the underframe, so that the handrail portion rotates relative to the body.

2. The foldable elliptical machine of claim 1, wherein the bottom of the armrest portion is provided with an arcuate bottom plate, the top of the body is provided with a top plate that mates with the bottom plate, the bottom plate is against the top plate to effect the body to support the armrest portion as the armrest portion moves between the first position and the second position.

3. The foldable elliptical machine of claim 2, wherein the armrest portion comprises:

the handrail part body is arranged above the body;

the first handrail is rotationally connected with the handrail part body, and one end of the first handrail is hinged with the pedal part, so that the pedal part is driven to move when the first handrail is pulled;

a second armrest fixed to the armrest portion body;

and the display device is fixed on the top of the armrest part body so as to display current movement data.

4. The foldable elliptical machine of claim 3, wherein the first armrest is vertically provided with a sleeve rod, the armrest portion body is provided with a rotating rod, and the first armrest is sleeved on the rotating rod through the sleeve rod, so that the first armrest is in rotational connection with the armrest portion body.

5. A foldable elliptical machine according to claim 3, wherein the foot rest comprises:

a first lever hinged with the body;

one end of the second rod is hinged with the first rod, the other end of the second rod is arranged on the underframe and is in sliding connection with the underframe, and the second rod and the first rod form a connecting rod structure;

and one end of the third rod is hinged with the second rod and moves synchronously with the second rod, and the other end of the third rod is hinged with the first handrail so as to drive the pedal part to move when the first handrail is pulled.

6. The foldable elliptical machine of claim 5, wherein a pedal is provided at an end of the third bar that is hinged to the second bar for stepping upon during use.

7. The foldable elliptical machine of claim 2, wherein the bottom plate is provided with a first screw hole, and the top plate is provided with a second screw hole at a position corresponding to the first screw hole, so that the body and the armrest part are fixed by screws when the armrest part is respectively positioned at the first position and the second position.

8. A foldable elliptical machine according to claim 3, wherein the centre of the top plate is provided with a bayonet into which the armrest portion body is inserted when the armrest portion is in the first position, to effect positioning of the armrest portion and the body.

9. The foldable elliptical machine of claim 2, wherein the connection assembly comprises:

one end of the connecting piece is fixed on the bottom plate;

the screw rod is fixed at the other end of the connecting piece in the horizontal direction and penetrates through the connecting groove;

the rotating sleeve is sleeved on the screw rod and arranged between the screw rod and the connecting groove, so that the connecting assembly rotates when moving along the connecting groove, and sliding friction between the connecting assembly and the connecting groove is avoided.

10. The foldable elliptical machine of claim 9, wherein the body is provided with a pair of the connection grooves, the connection grooves are respectively provided at both sides of the connection member, and both ends of the screw rod respectively pass through the connection grooves.

Images