Universal wheel of draw-bar box

Abstract

The utility model discloses a universal wheel of a draw-bar box, which comprises a wheel carrier, guide wheels and a tray, the guide wheels and the tray are arranged on two sides of the wheel carrier, a brake groove is arranged on the wheel carrier, a brake part is arranged on the wheel carrier, a sliding groove is arranged in the middle of the brake part, connecting holes are arranged on two sides of the brake part on the sliding groove, and connecting columns are arranged on two sides of the wheel carrier. The brake part is detachably connected with the wheel frame through the connecting hole and the connecting column, a brake shaft is arranged on the side, away from the sliding groove, of the brake part, a baffle is arranged above the brake shaft, a plurality of limiting columns are arranged in the guide wheel, and the brake shaft abuts against the limiting columns to form limiting fit during braking. When the brake piece anticlockwise rotates around the connecting column to the top of the brake groove, the brake shaft is arranged in the space between any two adjacent limiting columns, at the moment, the universal wheels rotate, the brake shaft can abut against the limiting columns to achieve stopping of the universal wheels, and compared with a downward pressing brake mode, the brake piece can effectively prevent the trunk from being braked due to misoperation.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of trolley case accessories, especially to a trolley case universal wheel. BACKGROUND

[0002] Trolley case has been widely applied as a tool for travel, and the existing trolley case is all equipped with a roller, which is convenient for the user to pull the case forward. In the use process, in order to make the trolley case keep still when standing, a brake structure is arranged on the guide wheel. The traditional brake structure adopts the way of pressing the brake piece downward to make the brake structure and the wheel body resist each other to complete the braking. In the driving process, the trolley case is prone to overturning due to accidental touch.

[0003] The Chinese utility model patent with the publication number "CN221417851U" discloses a trolley case roller, which comprises a wheel frame and guide wheels arranged on both sides of the wheel frame. A brake piece is hingedly connected to the wheel frame. The brake piece comprises a body, a button block arranged on the upper end of the body, and a brake shaft arranged on the lower end of the body. The brake shaft is used to limit the rotation of the guide wheel. A brake groove is arranged on the wheel frame, and the brake shaft can slide in the brake groove. A movable limiting block is arranged in the body, and the lower end of the limiting block extends to the outside of the body. Two limiting grooves for limiting the limiting block are arranged on the inner wall of the brake groove. A plurality of limiting ribs are arranged on the inner side of the guide wheel along the axis of the guide wheel. A limiting column is arranged in the limiting rib. The brake shaft and the limiting column abut against each other to form a limiting fit when the brake is applied. The distance between the axis of the limiting column and the axis of the guide wheel is greater than the radius of the guide wheel.

[0004] However, the above-mentioned trolley case roller has the following technical defects:

[0005] Firstly, the brake piece realizes the brake by the mutual cooperation of the brake shaft and the limiting column through the sliding of the limiting block in the limiting groove. Since the overall volume of the limiting block is small and the limiting block is limited by the spring, the spring is prone to elastic deformation. The brake piece cannot maintain a stable position in the brake groove, resulting in the failure of the brake function.

[0006] Secondly, the brake piece is fixed on the wheel frame by the pin shaft. Since the structure strength of the limiting groove part is low, the entire wheel frame needs to be disassembled and replaced when it is broken. The replacement process is relatively complicated.

[0007] Thirdly, the wheel frame is connected with the tray through the connecting shaft, and the roller is installed on the luggage case through the tray. When the connecting shaft fails, the connecting shaft cannot be quickly checked and replaced. The tray needs to be disassembled from the luggage case before the connecting shaft can be repaired, which is relatively inconvenient.

[0008] Therefore, it is necessary to improve the above-mentioned defects. UTILITY MODEL CONTENTS

[0009] The utility model discloses a kind of trolley case universal wheels to solve the above problems existing in prior art.

[0010] To achieve the above object, the utility model employs the technical scheme: a kind of trolley case universal wheel, including wheel frame, guide wheel and tray being located the both sides of wheel frame, brake groove is opened in wheel frame, brake piece is equipped on wheel frame, sliding slot is opened in brake piece middle part, connecting hole is opened in brake piece and is located the both sides of sliding slot, connecting column is equipped on the both sides of wheel frame, connecting column is integrally formed with wheel frame, brake piece is realized with wheel frame by connecting hole and connecting column The detachable connection of brake piece is equipped with brake shaft on the side of brake piece away from sliding slot, brake shaft is integrally formed with brake piece, baffle is equipped above brake shaft, a plurality of limit posts are equipped in guide wheel, brake shaft is abutted to form limit cooperation when braking, the distance of limit post axis to guide wheel axis is greater than the radius of guide wheel.

[0011] By adopting the above technical scheme: brake piece is detachably connected on wheel frame by connecting column, when brake piece slides in brake groove, sliding slot makes brake piece can move around connecting column smoothly, and the baffle on brake shaft can improve the strength of brake piece as a whole and prevent foreign matter from being stuck in brake groove, causing the blockage in brake groove and affecting the rotation of brake piece. In addition, brake piece is initially located at the bottom of brake groove, brake shaft cannot contact with limit post, universal wheel is in movable state, when brake piece rotates counterclockwise around connecting column to the top of brake groove, brake shaft is placed in the space between any two adjacent limit posts, at this time, universal wheel rotates, brake shaft will be in contact with limit post to realize the stop of universal wheel. Compared with the way of pressing brake, brake piece can effectively prevent the luggage case from braking caused by misoperation.

[0012] The above-mentioned trolley case universal wheel can be further provided with: the inner wall of the brake groove near one side of the outer periphery is provided with a blocking boss, the inner wall of the brake groove is provided with a first limiting groove and a second limiting groove for limiting the brake shaft, the first limiting groove and the second limiting groove form a limiting boss therebetween, the blocking boss is slightly higher than the limiting boss, the inner wall of the side of the brake groove away from the limiting groove is a sliding part, and the outer periphery of the brake shaft is in sliding connection with the sliding part.

[0013] By adopting the above technical scheme: when brake piece switches between braking and non-braking gears, because brake piece and brake groove are both elastic, when brake shaft slides from the first limiting groove to the second limiting groove, brake shaft is in contact with the limiting boss, when the applied force is greater than the directional force of the limiting boss on brake shaft, brake shaft is displaced, and the switching of the braking state of universal wheel is completed. Moreover, the blocking boss on the outer side of the brake groove is slightly higher than the limiting boss, when brake shaft moves from the first limiting groove to the second limiting groove, the blocking boss can resist brake shaft, which can effectively prevent brake piece from rotating too much and coming off the brake groove. In addition, brake piece can be quickly detached by applying greater force to make brake shaft slide out of the brake groove.

[0014] The trolley case universal wheel can be further provided with: the brake member is provided with a connecting portion on both sides of the sliding groove, the connecting portion is connected with a button block, the button block is integrally formed with the brake member, and the surface of the button block is provided with a plurality of anti-skid blocks.

[0015] By adopting the above technical scheme: the sliding groove makes the both sides of the brake member have high elasticity, the button block is arranged on the connecting portion, the brake member is prevented from being separated from the wheel frame due to elastic deformation of the both sides of the brake member, and the stability of the connection of the brake member is improved. In addition, the button block can provide a contact portion for the brake member, the arrangement of the anti-skid blocks can improve the friction force during contact, and the stability when the button block is pressed is improved.

[0016] The trolley case universal wheel can be further provided with: the wheel frame is provided with a reinforcing rib structure, the inner side of the guide wheel is provided with a plurality of limiting ribs distributed in radial lines along the axis of the guide wheel, the limiting column is located on the limiting ribs, and the limiting ribs are further provided with reinforcing ribs.

[0017] By adopting the above technical scheme: the reinforcing ribs on the wheel frame can improve the overall strength of the wheel frame and improve the durability of the wheel frame, the limiting ribs distributed in radial lines on the inner side of the guide wheel can transmit the force to the entire wheel body when the brake shaft and the limiting column are in contact, and the reinforcing ribs arranged on the basis of the limiting ribs further improve the strength of the wheel body.

[0018] The trolley case universal wheel can be further provided with: the guide wheel is provided with a plurality of clamping holes in the middle of the limiting ribs, the outer side of the guide wheel is provided with a cover plate, the side of the cover plate close to the guide wheel is provided with a clamping buckle corresponding to the clamping hole, the cover plate is detachably connected with the guide wheel by clamping the clamping buckle in the clamping hole, the clamping buckle comprises a connecting block and a buckling block, and the clamping buckle is provided with a supporting block on the side of the buckling block away from the buckling block.

[0019] By adopting the above technical scheme: the cover plate is clamped in the clamping hole of the guide wheel through the clamping buckle, the cover plate can protect the side of the guide wheel, prevent pollutants splashed during the movement of the luggage from entering the inside of the guide wheel, and can also carve various patterns on the cover plate to improve the appearance of the universal wheel. In addition, the supporting block can support the connecting block to improve the strength of the clamping buckle structure and the sealing ability of the cover plate.

[0020] The trolley case universal wheel can be further provided with: the wheel frame is provided with a rotating shaft hole penetrating through the wheel frame at the end away from the brake groove, a riveting shaft is arranged in the rotating shaft hole, a bearing portion is arranged above the rotating shaft hole of the wheel frame, the middle of the bearing portion is a reinforcing rib structure, a first annular groove is arranged on the outer periphery of the bearing portion, an installation portion is arranged at the bottom of the tray, a second annular groove is arranged at the bottom of the installation portion, an annular ball element is arranged between the first annular groove and the second annular groove, and one end of the riveting shaft is sequentially sleeved with the annular ball element and the wheel frame in the tray.

[0021] By adopting the technical scheme, the wheel frame is hinged to the tray through the hinge shaft in the rotating shaft hole, the rotating shaft hole penetrates the wheel frame, the hinge shaft can be directly checked in the rotating shaft hole, the hinge shaft is easier to check and maintain, the first annular groove of the bearing part of the wheel frame and the second annular groove of the mounting part on the tray can limit the annular ball element, the annular ball element can be stably arranged between the bearing part and the mounting part, the wheel frame can be conveniently rotated relative to the tray, and the rotation speed of the wheel frame is improved.

[0022] The universal wheel of the trolley case can be further provided with a resisting block arranged on the riveting shaft, the resisting block can abut against the wheel frame, an enclosing groove is arranged at the end of the rotating shaft hole away from the tray, and an enclosing cover is arranged in the enclosing groove and connected with the rotating shaft hole through the enclosing groove.

[0023] By adopting the technical scheme, the resisting block can prevent the riveting shaft from moving up and down in the rotating shaft hole during the movement of the universal wheel, the stability of the connection between the wheel frame and the tray is improved, the enclosing cover in the rotating shaft hole can protect the riveting shaft, foreign matters are prevented from entering the rotating shaft hole to affect the production of the riveting shaft, damage of the riveting shaft is avoided, and the service life of the riveting shaft is prolonged.

[0024] The universal wheel of the trolley case can be further provided with a gasket arranged at the middle part of the mounting part away from the wheel frame, the middle part of the mounting part is arranged on the reinforcing rib structure, a plurality of fixing columns are arranged on the side of the tray away from the wheel frame, a fixing hole is arranged in the middle part of each fixing column, and a plurality of clamping blocks are arranged on the outer periphery of each fixing column.

[0025] By adopting the technical scheme, when the tray is fixed to the luggage case, the gasket in the mounting part can provide a certain buffer for the tray, and the friction between the case and the riveting shaft is reduced. In addition, the tray can be stably connected to the case through the fixing columns and the fixing holes, and the stability of the connection between the tray and the case is further improved.

[0026] The universal wheel of the trolley case has the following beneficial effects:

[0027] First, the sliding groove of the brake element cooperates with the wheel frame, when the brake element rotates to the top of the brake groove through the connecting column, the brake shaft abuts against the limiting column, the baffle closes the brake groove, and foreign matters cannot enter the brake groove, which not only ensures the effective realization of the brake function, but also improves the stability of the brake function of the universal wheel and prolongs the service life of the universal wheel. In addition, when the brake shaft slides between the first limiting groove and the second limiting groove, the brake state is switched through the limiting protrusion, the smooth transition of the brake shaft is realized through the self-elasticity of the brake element and the wheel frame, and the resisting protrusion can prevent the brake element from rotating excessively and separating from the brake groove.

[0028] Second, the reinforcing structure arranged on the wheel frame and the guide wheel can improve the strength of the universal wheel structure, can maintain stable function under various conditions, improve the overall strength and durability of the wheel frame and the wheel body, and make the universal wheel more solid and durable.

[0029] Third, the cover plate can effectively protect the guide wheel, and the sealing cover can close and protect the rotating shaft hole, both of which are connected in a detachable manner, so that the wheel frame and the guide wheel are convenient to maintain and replace, and the maintenance efficiency of the universal wheel is improved.

[0030] The utility model will be further explained in detail in combination with the drawings and examples. DRAWINGS

[0031] Figure 1 It is the whole schematic view of the utility model's universal wheel;

[0032] Figure 2 It is the exploded schematic view of the utility model's universal wheel;

[0033] Figure 3 It is the wheel frame structure schematic view of the utility model;

[0034] Figure 4 It is the wheel frame cross section schematic view of the utility model;

[0035] Figure 5 It is the brake piece structure schematic view of the utility model;

[0036] Figure 6 It is the guide wheel structure schematic view of the utility model;

[0037] Figure 7 It is the cover plate mechanism schematic view of the utility model;

[0038] Figure 8 It is the tray structure schematic view of the utility model;

[0039] Figure 9 It is the tray structure schematic view of the utility model;

[0040] Label notes: wheel frame 1, brake groove 11, resistance boss 111, first limit groove 112, second limit groove 113, limit boss 114, sliding part 115, brake piece 12, sliding groove 121, connecting hole 122, brake shaft 123, baffle 124, connecting part 125, button block 126, anti-skid block 127, connecting column 13, reinforcing rib 14, rotating shaft hole 15, sealing groove 151, sealing cover 152, riveting shaft 16, resistance block 161, bearing part 17, first annular groove 171, guide wheel 2, limit column 21, limit rib 22, clamping hole 23, cover plate 24, clamping buckle 25, connecting block 251, buckling block 252, support block 253, tray 3, mounting part 31, second annular groove 311, annular ball element 312, washer 313, fixed column 32, fixed hole 321, clamping block 322. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0042] As Figures 1 to 9The universal wheel of the trolley case includes a wheel frame 1, guide wheels 2 and trays 3 arranged on both sides of the wheel frame 1, a brake slot 11 arranged on the wheel frame 1, a brake piece 12 arranged on the wheel frame 1, a sliding slot 121 arranged in the middle of the brake piece 12, connecting holes 122 arranged on both sides of the brake piece 12, connecting columns 13 arranged on both sides of the wheel frame 1, the connecting columns 13 being integrally formed with the wheel frame 1, the brake piece 12 being detachably connected with the wheel frame 1 through the connecting holes 122 and the connecting columns 13, a brake shaft 123 arranged on the side of the brake piece 12 away from the sliding slot 121, the brake shaft 123 being integrally formed with the brake piece 12, a baffle 124 arranged above the brake shaft 123, a plurality of limiting columns 21 arranged in the guide wheels 2, the brake shaft 123 being in limiting cooperation with the limiting columns 21 when braking, and the distance between the axis of the limiting columns 21 and the axis of the guide wheels 2 being greater than the radius of the guide wheels 2. The brake piece 12 is detachably connected with the wheel frame 1 through the connecting columns 13, the sliding slot 121 enables the brake piece 12 to smoothly move around the connecting columns 13 when the brake piece 12 slides in the brake slot 11, and the baffle 124 on the brake shaft 123 can improve the strength of the brake piece 12 as a whole and prevent foreign matters from being stuck in the brake slot 11, thereby preventing the brake slot 11 from being blocked and affecting the rotation of the brake piece 12. In addition, the brake piece 12 is initially arranged at the bottom of the brake slot 11, the brake shaft 123 cannot contact the limiting columns 21, and the universal wheel is in a movable state. When the brake piece 12 rotates counterclockwise around the connecting columns 13 to the top of the brake slot 11, the brake shaft 123 is arranged in the space between any two adjacent limiting columns 21, at this time, the universal wheel rotates, the brake shaft 123 will be in contact with the limiting columns 21 to stop the universal wheel. Compared with the pressing brake mode, the brake piece 12 can effectively prevent the suitcase from being braked due to misoperation.

[0043] The brake groove 11 is provided with a resisting boss 111 near the inner wall of the outer peripheral side, the inner wall of the brake groove 11 is provided with a first limiting groove 112 and a second limiting groove 113 for limiting the brake shaft 123, the first limiting groove 112 and the second limiting groove 113 form a limiting boss 114, the resisting boss 111 is slightly higher than the limiting boss 114, the inner wall of the side of the brake groove 11 away from the limiting groove is a sliding part 115, the outer periphery of the brake shaft 123 is in sliding connection with the sliding part 115. When the brake part 12 switches between the brake and non-brake positions, because the brake part 12 and the brake groove 11 are both elastic, when the brake shaft 123 slides from the first limiting groove 112 to the second limiting groove 113, the brake shaft 123 is in contact with the limiting boss, when the applied force is greater than the directional force of the limiting boss on the brake shaft 123, the brake shaft 123 is displaced, and the switching of the state of the universal wheel brake is completed. Moreover, the resisting boss 111 on the outside of the brake groove 11 is slightly higher than the limiting boss 114, when the brake shaft 123 moves from the first limiting groove 112 to the second limiting groove 113, the resisting boss can resist the brake shaft 123, which can effectively prevent the brake part 12 from rotating too much and coming off the brake groove 11, in addition, a greater force can be applied to make the brake shaft 123 slide out of the brake groove 11, and the brake part 12 can be quickly disassembled.

[0044] The brake part 12 is provided with a connecting part 125 on both sides of the sliding groove 121, the connecting part 125 is connected with a button block 126, the button block 126 is integrally formed with the brake part 12, and the surface of the button block 126 is provided with a plurality of anti-skid blocks 127. The sliding groove 121 makes the both sides of the brake part 12 more elastic, by providing the button block 126 on the connecting part 125, the brake part 12 can be prevented from coming off the wheel frame 1 due to elastic deformation of the both sides of the brake part 12, and the stability of the connection of the brake part 12 is improved. In addition, the button block 126 can provide a contact part for the brake part 12, and the setting of the anti-skid blocks 127 can improve the friction force when contacting and improve the stability when pressing the button block 126.

[0045] The wheel frame 1 is provided with a reinforcing rib 14 structure, the inner side of the guide wheel 2 is provided with a plurality of limiting ribs 22 distributed along the axis of the guide wheel 2, the limiting column 21 is located on the limiting rib 22, and the reinforcing rib 14 is further provided between the limiting ribs 22. The reinforcing rib 14 on the wheel frame 1 can improve the overall strength of the wheel frame 1 and improve the durability of the wheel frame 1, and the radially distributed limiting ribs 22 on the inner side of the guide wheel 2 can transmit the force to the entire wheel body when the brake shaft 123 is in contact with the limiting column 21, and the reinforcing rib 14 provided on the basis of the limiting rib 22 further improves the strength of the wheel body.

[0046] The guide wheel 2 is located in the middle of the limiting rib 22 and is provided with a plurality of clamping holes 23. The outer side of the guide wheel 2 is provided with a cover plate 24. The side of the cover plate 24 close to the guide wheel 2 is provided with clamping buckles 25 corresponding to the clamping holes 23. The cover plate 24 is detachably connected with the guide wheel 2 through the clamping of the clamping buckles 25 and the clamping holes 23. The clamping buckles 25 include connecting blocks 251 and buckling blocks 252. The clamping buckles 25 are provided with supporting blocks 253 on the side away from the buckling blocks 252. The cover plate 24 is buckled in the clamping holes 23 of the guide wheel 2 through the clamping buckles 25. The cover plate 24 can protect the side of the guide wheel 2, preventing the pollutants splashed during the movement of the luggage from entering the inside of the guide wheel 2. Meanwhile, the cover plate 24 can carve various patterns to improve the aesthetic appearance of the universal wheel. In addition, the supporting blocks 253 can support the connecting blocks 261 to improve the strength of the structure of the clamping buckles 25 and the sealing capacity of the cover plate 24.

[0047] The wheel frame 1 is provided with a rotating shaft hole 15 penetrating the wheel frame 1 at the end away from the brake groove 11. The rotating shaft hole 15 is provided with a riveting shaft 16. The wheel frame 1 is provided with a bearing part 17 above the rotating shaft hole 15. The middle part of the bearing part 17 is provided with a reinforcing rib 14 structure. The bearing part 17 is provided with a first annular groove 171 outside the reinforcing rib 14. The bottom of the tray 3 is provided with a mounting part 31. The bottom of the mounting part 31 is provided with a second annular groove 311. The first annular groove 171 and the second annular groove 311 are provided with annular ball members 312 therebetween. One end of the riveting shaft 16 is sequentially sleeved with the annular ball members 312 and the wheel frame 1 in the tray 3. The wheel frame 1 is hingedly connected with the tray 3 through the riveting shaft in the rotating shaft hole 15. Since the rotating shaft hole 15 penetrates the wheel frame 1, the riveting shaft can be directly checked in the rotating shaft hole 15. The checking and maintenance of the riveting shaft are more simple. The first annular groove 171 of the bearing part 17 of the wheel frame 1 and the second annular groove 311 of the mounting part 31 on the tray 3 can limit the annular ball members 312. The annular ball members 312 can be stably arranged between the bearing part 17 and the mounting part 31. The wheel frame 1 can be conveniently rotated relative to the tray 3 to improve the quickness of the rotation of the wheel frame 1.

[0048] The riveting shaft 16 is provided with a resisting block 161 which can resist the wheel frame 1. The end of the rotating shaft hole 15 away from the tray 3 is provided with a sealing groove 151. The sealing groove 151 is provided with a sealing cover 152. The sealing cover 152 is hingedly connected with the rotating shaft hole 15 through the sealing groove 151. During the movement of the universal wheel, the resisting block 161 can prevent the riveting shaft 16 from moving up and down in the rotating shaft hole 15 to improve the stability of the connection between the wheel frame 1 and the tray 3. Meanwhile, the sealing cover 152 in the rotating shaft hole 15 can protect the riveting shaft 16 to prevent foreign matters from entering the rotating shaft hole 15 to affect the production of the riveting shaft 16 and cause damage to the riveting shaft 16, thereby improving the service life of the riveting shaft 16.

[0049] The mounting part 31 is provided with a gasket 313 at the middle of the one end of the wheel frame 1, and the middle of the mounting part 31 is arranged in the structure of the reinforcing rib 14. The tray 3 is provided with a plurality of fixing columns 32 at the one side of the wheel frame 1, the middle of the fixing column 32 is provided with a fixing hole 321, and the outer periphery of the fixing column 32 is provided with a plurality of clamping blocks 322. When the tray 3 is fixed with the luggage box, the gasket 313 in the mounting part 31 can provide a certain buffer for the tray 3, so as to reduce the friction between the box body and the riveting shaft 16. In addition, the tray 3 can be stably connected with the box body through the fixing column 32 and the fixing hole 321, and the setting of the clamping block 322 further improves the stability of the connection between the tray 3 and the box body.

[0050] The above-mentioned embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model.

Claims

1. A universal wheel of a trolley case, comprising a wheel frame, guide wheels arranged on both sides of the wheel frame, and a tray, a brake groove is formed on the wheel frame, and a brake piece is arranged on the wheel frame, characterized in that: The brake member is provided with a sliding groove in the middle, and connecting holes are arranged on both sides of the sliding groove, connecting columns are arranged on both sides of the wheel frame, the connecting columns are integrally formed with the wheel frame, the brake member is detachably connected with the wheel frame through the connecting holes and the connecting columns, a brake shaft is arranged on the side of the brake member away from the sliding groove, the brake shaft is integrally formed with the brake member, a baffle is arranged above the brake shaft, a limiting column is arranged in the guide wheel, the brake shaft abuts against the limiting column when braking to form a limiting fit, and the distance from the axis of the limiting column to the axis of the guide wheel is greater than the radius of the guide wheel.

2. The universal wheel for a trolley case of claim 1, wherein: The brake groove is provided with a resisting boss on the inner wall of the side close to the outer periphery, the inner wall of the brake groove is provided with a first limiting groove and a second limiting groove for limiting the brake shaft, the limiting boss is formed between the first limiting groove and the second limiting groove, the resisting boss is slightly higher than the limiting boss, and the inner wall of the side of the brake groove away from the limiting groove is a sliding part, and the outer periphery of the brake shaft is in sliding connection with the sliding part.

3. The universal wheel for a trolley case of claim 2, wherein: The brake member is provided with a connecting part on both sides of the sliding groove, a button block is connected to the connecting part, the button block is integrally formed with the brake member, and a plurality of anti-skid blocks are arranged on the surface of the button block.

4. The universal wheel for a draw-suitcase according to claim 3, wherein: The wheel frame is provided with a reinforcing rib structure, a plurality of limiting ribs are arranged on the inner side of the guide wheel and distributed along the axis of the guide wheel, the limiting column is located on the limiting rib, and reinforcing ribs are further arranged between the limiting ribs.

5. The universal wheel for a trolley case of claim 4, wherein: The guide wheel is provided with a plurality of clamping holes in the middle of the limiting rib, the outer side of the guide wheel is provided with a cover plate, the side of the cover plate close to the guide wheel is provided with a clamping buckle corresponding to the clamping hole, the cover plate is detachably connected with the guide wheel by clamping the clamping buckle with the clamping hole, the clamping buckle comprises a connecting block and a buckling block, and the clamping buckle is provided with a supporting block on the side of the connecting block away from the buckling block.

6. The universal wheel for a trolley case according to any one of claims 1 to 5, characterized in that: The wheel frame is provided with a rotating shaft hole penetrating through the wheel frame at the end away from the brake groove, a riveting shaft is arranged in the rotating shaft hole, the wheel frame is provided with a bearing part above the rotating shaft hole, the middle of the bearing part is a reinforcing rib structure, the bearing part is provided with a first annular groove on the outer periphery of the reinforcing rib, the bottom of the tray is provided with a mounting part, the bottom of the mounting part is provided with a second annular groove, an annular ball part is arranged between the first annular groove and the second annular groove, and one end of the riveting shaft is sequentially sleeved with the annular ball part and the wheel frame in the tray.

7. The universal wheel for a draw-suitcase according to claim 6, characterized in that: The riveting shaft is provided with a resisting block, the resisting block can abut against the wheel frame, an enclosing groove is formed at the end of the rotating shaft hole away from the tray, an enclosing cover is arranged in the enclosing groove, and the enclosing cover is clamped with the rotating shaft hole through the enclosing groove.

8. The universal wheel for a draw-suitcase according to claim 7, characterized in that: A gasket is arranged in the middle of the mounting part away from the wheel frame, the middle of the mounting part is arranged on the reinforcing rib structure, a plurality of fixing columns are arranged on the side of the tray away from the wheel frame, a fixing hole is formed in the middle of each fixing column, and a plurality of clamping blocks are arranged on the outer periphery of each fixing column.

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