Integrated die-casting type wheelchair side frame

Abstract

The utility model relates to a wheelchair, in particular to an integrated die-casting type wheelchair side frame. An integrated die-casting type wheelchair side frame comprises a side frame body in an enclosed shape, a backrest frame extending upwards is arranged on the upper portion of the rear side of the side frame body, a motor frame in an enclosed shape is arranged on the lower portion of the rear side of the side frame body, and the upper side and the lower side of the side frame body are each provided with a transverse extending section. The front portion and the rear portion of the transverse extending section located on the lower side are each provided with a lower connecting piece installation part, the lower connecting piece installation parts form a first installation groove with a lateral opening, reinforcing ribs connected with the upper side wall, the lower side wall, the front side wall and the rear side wall are arranged in the first installation groove, and the side walls of the reinforcing ribs are planes. A first fixing hole which is provided with a lateral opening and used for being matched with a fastener is formed in the position, connected with the front side wall and the rear side wall, of the reinforcing rib, and a lower connecting piece of the folding frame is fixed to the first mounting groove of the lower connecting piece mounting part through the fastener. The utility model has the advantages that the maintenance is convenient, the bearing capacity can be improved, the use stability can be improved, and the service life can be prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wheelchair, concretely relates to an integrated die-casting type wheelchair side frame. BACKGROUND

[0002] In order to improve production efficiency and reduce welding processing procedures, the side frame of the folding wheelchair is obtained by die casting, and then the two side frames are connected through the X-shaped folding frame.

[0003] As disclosed in the application No. 202223292782. X, the folding wheelchair includes two side frames, and an X-shaped folding frame is arranged between the two side frames. The X-shaped folding frame includes two groups of folding links, the folding links are rotatably connected with the two side frames, and the two groups of folding links are rotatably connected with each other. A connecting rod is rotatably arranged on the side frame, the connecting rod on one side frame is rotatably connected with the folding link on the other side frame, a support rod is arranged on the folding link, a support portion for supporting the support rod is arranged on the side frame, and a protrusion with a second hinge hole is further arranged on the side frame.

[0004] Since the protrusion and the support portion are stress points, stress concentration effect is easy to occur, leading to crack generation. The protrusion and the support portion have low strength, which affects the carrying capacity of the side frame and causes deformation. Safety accidents are easy to occur during the use of the wheelchair, and the entire side frame needs to be replaced after the protrusion and the support portion are aged. If the protrusion and the support portion are welded on the side frame, a welding robot needs to be used to ensure the welding precision, which is high in cost. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an integrated die-casting type wheelchair side frame which is convenient for die-casting forming and convenient for maintenance.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an integrated die-casting type wheelchair side frame includes a closed side frame body, the rear upper part of the side frame body has an upwardly extending backrest frame, the rear lower part of the side frame body is provided with a closed motor frame, the side frame body, the backrest frame and the motor frame are integrally formed, the upper side and the lower side of the side frame body are provided with a transversely extending section extending in the front-rear direction, the front part and the rear part of the transversely extending section on the lower side are provided with a lower connecting piece mounting portion, the lower connecting piece mounting portion constitutes a lateral opening and is used for accommodating a first mounting groove of a folding frame lower connecting piece portion, a reinforcing rib connecting the upper and lower front and rear side walls is arranged in the first mounting groove, the side wall of the reinforcing rib is a plane, the first fixing hole for cooperating with a fastener is formed in the reinforcing rib connecting the front and rear side walls, and the folding frame lower connecting piece is fixed to the first mounting groove of the lower connecting piece mounting portion through the fastener.

[0007] The utility model discloses a lower connecting piece mounting portion for connecting X-shaped folding frame is fixed on the side frame through fastener, can reduce the setting of the convex of the size shape not being identical of setting in the side frame main body side, make the side frame convenient to die casting and ejection, compared with welding, through the reinforcing rib side wall and the first installation slot groove wall guarantee the positioning position, can be under the guarantee installation accuracy condition, need not adopt the welding mechanical person and carry out the welding fixed, can reduce production cost.

[0008] As preferred, the side frame body has vertical extension sections on both front and back sides, the vertical extension section on the back side extends upward to form the backrest frame, and the vertical extension section on the front side has a front connecting section between its lower end and the front end of the horizontal extension section on the lower side, the cross-sectional area of the front connecting section is larger than that of the vertical extension section at the deviated end and that of the horizontal extension section at the deviated lower connecting piece mounting portion.

[0009] The increased cross-sectional area of the front connecting section can increase the load bearing capacity of the whole structure, especially in the area with larger stress, which helps to improve the stability and durability of the side frame; by increasing the cross-sectional area of the front connecting section, the stress can be more effectively dispersed, reducing the risk of stress concentration and deformation or damage of the side frame

[0010] As preferred, the lower connecting piece mounting portion on the front side is connected with the front end of the front connecting section. The lower connecting piece mounting portion is located at the front connecting section with larger cross-sectional area, which can improve the load bearing capacity, use stability and service life.

[0011] As preferred, the lower end of the vertical extension section on the back side is higher than the rear end of the horizontal extension section on the lower side, and an inclined rear connecting section is connected between the lower end of the vertical extension section on the back side and the rear end of the horizontal extension section on the lower side, the rear connecting section is the overlapping part of the side frame body in the form of enclosure and the motor frame in the form of enclosure.

[0012] As preferred, the lower connecting piece mounting portion on the back side is connected with the front end of the rear connecting section. Connecting the lower connecting piece mounting portion on the back side with the front end of the rear connecting section can form a more solid structure, which helps to improve the overall rigidity and strength of the wheelchair side frame, especially when bearing larger load or external force impact.

[0013] Preferably, the lower part of the front vertical extension is provided with a front wheel connecting part having a lateral opening and a second mounting groove for accommodating part of the upper end of the front wheel assembly, and the front wheel connecting part is provided with a second fixing hole and is located at the upper end of the front connecting part.

[0014] The above arrangement can more reasonably distribute the stress, especially when the side frame bears vertical and lateral forces, which helps to disperse the force and reduce local stress concentration, thereby improving the durability and stability of the side frame. The inclined rear connecting part can serve as an additional support structure to enhance the connection strength between the side frame body and the motor frame, and facilitate the support of the motor and the rear wheels on the entire frame.

[0015] Preferably, the upper and lower transverse extensions of the side frame body form a space for accommodating the controller or battery box, and the lower connecting part mounting part is provided with a positioning groove that opens upward and backward or backward to accommodate the controller or battery box. By providing the positioning groove, the battery box or controller can be pre-positioned, facilitating the fixation of the battery box or controller to the side frame by fasteners, and the positioning groove can also serve as a certain limiting function to limit the shaking of the battery box and controller during wheelchair travel.

[0016] Preferably, the cross section of the side frame body, backrest frame, and motor frame is an integrally formed 8-shaped structure. The above arrangement facilitates demolding and reduces weight while ensuring structural strength.

[0017] Preferably, the upper transverse extension on the upper side is fixed with an upper connecting part mounting part by fasteners, and the upper connecting part mounting part has a support groove for supporting the upper end of the X-shaped folding frame, and the support groove opens upward and penetrates the upper connecting part mounting part front and back. To facilitate the rotation of the upper end support rod of the X-shaped folding frame, the support groove should be a U-shaped groove.

[0018] The utility model discloses have the advantages of convenient maintenance, can improve the carrying capacity, can improve the use stability and prolong the service life. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a structural schematic view of the device of the utility model.

[0020] Fig. 2 It is a structural schematic view of the assembly of the side frame body and the X-shaped folding frame of the device of the utility model.

[0021] Fig. 3 It is a structural schematic view of the assembly of the side frame body and the X-shaped folding frame of the device of the utility model. DETAILED DESCRIPTION

[0022] The utility model will be further described below according to the drawings and specific embodiments.

[0023] As shown by Figs. 1 to 3 The embodiment discloses a one-piece die-cast wheelchair side frame, which comprises a closed side frame body 100, an upwardly extending backrest frame 200 is arranged on the upper part of the rear side of the side frame body 100, and a closed motor frame 300 is arranged on the lower part of the rear side of the side frame body 100, and the side frame body 100, the backrest frame 200 and the motor frame 300 are integrally formed. Wherein, an X-shaped folding frame 400 is arranged between the two side frame bodies 100, a foot fixing section 101 extending forwardly and used for fixing a foot assembly 201 is arranged on the lower side of the front end of the side frame body 100, and a auxiliary wheel fixing section 301 extending rearwardly and used for fixing an auxiliary wheel assembly 302 is arranged on the lower side of the rear end of the motor frame 300, and the foot fixing section 101 is higher than the auxiliary wheel fixing section 301. Wherein, extension plates 303 are arranged on the upper and lower sides of the motor frame 300, and the two extension plates 303 are fixed with the upper and lower parts of the shell of a speed reducer 304 respectively. Wherein, the upper end of the backrest frame 200 is used for fixing a push handrail 203, and a seat handrail 204 is fixed on the front side of the upper part of the backrest frame 200.

[0024] The upper side and the lower side of the side frame body 100 are provided with transverse extension sections 1 extending in the front-rear direction, the front and rear sides of the side frame body 100 are provided with vertical extension sections 2, the two transverse extension sections 1 and the two vertical extension sections 2 form the closed side frame body 100, the vertical extension section on the rear side is integrally extended upwardly to form the backrest frame 200, the lower end of the vertical extension section on the front side and the front end of the transverse extension section on the lower side are provided with a front connecting section 3, the lower end of the vertical extension section on the rear side is higher than the rear end of the transverse extension section on the lower side, and the lower end of the vertical extension section on the rear side and the rear end of the transverse extension section on the lower side are connected with an inclined rear connecting section 4, and the rear connecting section 4 is the overlapping part of the closed side frame body 100 and the closed motor frame 300. Wherein, the cross section of the side frame body 100, the backrest frame 200 and the motor frame 300 is an integrally formed 8-shaped structure, that is, the upper and lower parts of the transverse extension section 1 are wide in the middle and thin at the sides, and the front and rear parts of the vertical extension section 2 are wide in the middle and thin at the sides.

[0025] The front part and the rear part of the transverse extension section on the lower side are provided with lower connecting piece mounting parts 5, the lower connecting piece mounting parts 5 form first mounting grooves 51 in the form of plates and used for accommodating the plate-shaped parts of folding frame lower connecting pieces 6, the first mounting grooves 51 are provided with cross-shaped reinforcing ribs 52 connecting the upper and lower front and rear first mounting groove side walls, the side walls of the reinforcing ribs 52 are planes, the reinforcing ribs 52 are provided with first fixing holes 53 in the form of side openings and used for cooperating with fasteners at the connecting positions of the front and rear side walls, the folding frame lower connecting pieces 6 are fixed to the first mounting grooves 51 of the lower connecting piece mounting parts 5 through the fasteners, and the lower ends of the X-shaped folding frame 400 and the folding frame lower connecting pieces 6 are hingedly connected.

[0026] The cross-sectional area of the front connecting section 3 is greater than the cross-sectional area of the vertically extending section 2 at the upper and lower ends and the cross-sectional area of the laterally extending section 1 at the lower connecting member mounting portion 5. The lower connecting member mounting portion on the front side is connected to the front end of the front connecting section 3, and the lower connecting member mounting portion on the rear side is connected to the front end of the rear connecting section 4. The front section of the motor bracket 300 extends upward and is connected to the front end of the lower connecting member mounting portion on the rear side.

[0027] The lower part of the vertically extending section 2 on the front side has a front wheel connecting portion 7 with a second mounting groove 71 that is open laterally and used to accommodate part of the upper end of the front wheel assembly 102. The front wheel connecting portion 7 is provided with a second fixing hole, and the front wheel connecting portion 7 is located at the upper end of the front connecting section 3.

[0028] The upper and lower laterally extending sections 1 of the side bracket body 100 form a space for accommodating the battery box 109. The lower connecting member mounting portion on the front side is provided with a positioning groove 54 that is open upward and rearward to accommodate the lower front end of the battery box 109.

[0029] The upper laterally extending section is provided with an H-shaped upper connecting member mounting portion 8 that is fixed by fasteners. The upper connecting member mounting portion 8 spans the laterally extending section. The upper part of the upper connecting member mounting portion 8 has a support groove 80 that is open upward and extends through the upper connecting member mounting portion 8 from front to back and is used to support the upper end of the support rod 401 of the X-shaped folding bracket 400. To prevent the X-shaped folding bracket 400 from disengaging from the upper connecting member mounting portion 8, a connecting piece 402 is connected between the upper laterally extending section and the folding rod 403 of the X-shaped folding bracket 400. The two ends of the connecting piece 402 are hingedly connected to the laterally extending section and the folding rod, respectively.

[0030] The embodiment has the advantages of facilitating maintenance, improving load-carrying capacity, improving use stability, and prolonging service life.

Claims

1. An integrated die-cast wheelchair side frame, comprising a side frame body in a closed shape, an upper part of a rear side of the side frame body having a backrest frame extending upward, and a lower part of the rear side of the side frame body having a motor frame in a closed shape, characterized in that: The side frame body, the backrest frame and the motor frame are integrally formed, the upper side and the lower side of the side frame body are provided with a transverse extension section extending in the front-rear direction, the front part and the rear part of the transverse extension section at the lower side are provided with a lower connecting piece mounting part, the lower connecting piece mounting part forms a lateral opening and is used for accommodating a first mounting groove of the folding frame lower connecting piece part, a reinforcing rib connecting the upper and lower front and rear side walls is arranged in the first mounting groove, the side wall of the reinforcing rib is a plane, a first fixing hole for cooperating with a fastener is formed at the position where the reinforcing rib connects the front and rear side walls, and the folding frame lower connecting piece is fixed to the first mounting groove of the lower connecting piece mounting part through the fastener.

2. The one-piece die cast wheelchair side frame of claim 1, wherein: The side frame body is provided with a vertical extension section at the front and rear sides, the vertical extension section at the rear side extends upward to form the backrest frame, and the vertical extension section at the front side is provided with a front connecting section at the lower end and the front end of the transverse extension section at the lower side, the cross-sectional area of the front connecting section is greater than the cross-sectional area of the vertical extension section at the deviated end and the cross-sectional area of the transverse extension section at the deviated lower connecting piece mounting part.

3. The one-piece die cast wheelchair side frame of claim 2, wherein: The lower connecting piece mounting part at the front side is connected to the front end of the front connecting section.

4. The one-piece die cast wheelchair side frame of claim 2, wherein: The lower end of the vertical extension section at the rear side is higher than the rear end of the transverse extension section at the lower side, and an inclined rear connecting section is connected between the lower end of the vertical extension section at the rear side and the rear end of the transverse extension section at the lower side, and the rear connecting section is the overlapping position of the side frame body in the form of an enclosure and the motor frame in the form of an enclosure.

5. The one-piece die cast wheelchair side frame of claim 4, wherein: The lower connecting piece mounting part at the rear side is connected to the front end of the rear connecting section.

6. The one-piece die cast wheelchair side frame of claim 2, wherein: The vertical extension section at the front side is provided with a front wheel connecting part at the lower part, the front wheel connecting part is provided with a second mounting groove which is laterally open and is used for accommodating part of the upper end of the front wheel assembly, the front wheel connecting part is provided with a second fixing hole, and the front wheel connecting part is located at the upper end of the front connecting section.

7. The one-piece die cast wheelchair side frame of claim 2, wherein: The upper and lower transverse extension sections of the side frame body form a space for accommodating a controller or a battery box, and the lower connecting piece mounting part at the front side is provided with a positioning groove which is upwardly and rearwardly open to accommodate the front lower end of the controller or the front lower end of the battery box.

8. The one-piece die cast wheelchair side frame of claim 1, wherein: The cross section of the side frame body, the backrest frame and the motor frame is in the form of an integrally formed 8-shaped structure.

9. The one-piece die cast wheelchair side frame of claim 1 or 8, wherein: The upper connecting piece mounting part is fixed to the upper transverse extension section at the upper side through a fastener, and the upper connecting piece mounting part is provided with a supporting groove for supporting the upper end of the X-shaped folding frame, and the supporting groove is upwardly open and penetrates the upper connecting piece mounting part in the front-rear direction.

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