CN117644743B

CN117644743B - Brake castor

Info

Publication number: CN117644743B
Application number: CN202410124043.4A
Authority: CN
Inventors: 卢响根
Original assignee: Quanzhou Zhuoye Manganese Steel Castor Manufacturing Co ltd
Current assignee: Quanzhou Zhuoye Manganese Steel Castor Manufacturing Co ltd
Priority date: 2024-01-30
Filing date: 2024-01-30
Publication date: 2024-04-12
Anticipated expiration: 2044-01-30
Also published as: CN117644743A

Abstract

The invention relates to the field of casters, and provides a brake caster which comprises a caster body, wherein the caster body comprises a caster bracket, a roller rotatably arranged on the caster bracket and a brake mechanism arranged on the caster bracket, the brake mechanism comprises a first caster fixed shaft and a second caster fixed shaft which are arranged on the caster bracket in a penetrating way, a first caster rotating part rotatably arranged on the first caster fixed shaft, a third caster fixed shaft arranged on the first caster rotating part in a penetrating way, a second caster rotating part rotatably arranged on the second caster fixed shaft and a fourth caster fixed shaft arranged on the second caster rotating part in a penetrating way, a third caster rotating part is rotatably arranged between the third caster fixed shaft and the fourth caster fixed shaft, and a reset spring is arranged on the caster body. The four-bar structure is formed by the caster bracket, the first caster rotating part, the second caster rotating part and the third caster rotating part, so that the stability is high, the deformation is not easy to occur, and the braking effect is good.

Description

Brake castor

Technical Field

The invention relates to the field of casters, in particular to a brake caster.

Background

Some truckles are at the fixed brake portion of truckle support rear end installation, brake the truckle through pedal brake portion, need adopt great power to trample generally, brake portion receives great pedal effort for a long time, its stability is poor, warp even damage easily, influence the brake effect when the truckle is braked, when the truckle receives effort, brake portion gives the effort that the gyro wheel is fixed, if the effort is too big, brake portion probably can't stabilize the brake, lead to producing the friction between gyro wheel and the brake portion, especially under the circumstances that the truckle loading capacity is big, brake portion receives great effort for a long time, can take place to warp even damage.

Disclosure of Invention

Therefore, in order to solve the problems, the invention provides a brake castor which solves the technical problems that the castor is easy to deform or even damage in braking and has poor braking stability.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the brake castor comprises a castor main body, wherein the castor main body comprises a castor bracket, a roller rotatably arranged on the castor bracket and a brake mechanism arranged on the castor bracket, the brake mechanism comprises a first castor fixed shaft and a second castor fixed shaft which are arranged on the castor bracket in a penetrating manner, a first castor rotating part rotatably arranged on the first castor fixed shaft, a third castor fixed shaft arranged on the first castor rotating part in a penetrating manner, a second castor fixed shaft arranged on the second castor fixed shaft in a rotatable manner, a fourth castor fixed shaft arranged on the second castor rotating part in a penetrating manner, a third castor rotating part is rotatably arranged between the third castor fixed shaft and the fourth castor fixed shaft, a castor brake pedal is arranged on the second castor rotating part, a castor brake pedal is arranged on the first castor rotating part, and a brake pad can be abutted against the roller for braking; the caster body is provided with at least one reset spring, the reset spring is connected with two, three or four of the first caster fixing shaft, the second caster fixing shaft, the third caster fixing shaft and the fourth caster fixing shaft, and the reset spring can fix the braking state and the releasing state of the caster body; the caster comprises a caster bracket, a first caster rotating part, a second caster rotating part, a first sliding shaft, a second sliding shaft, a third caster rotating part, a fourth caster rotating part, a third caster rotating part and a fourth caster rotating part, wherein the first sliding shaft is arranged on the caster bracket; the first sliding shaft is provided with a first clamping part, the caster body comprises a rotating part, the rotating part is provided with a second clamping part, and when the caster is braked, the first clamping part can be clamped on the second clamping part to fix the rotating part.

Further:

the first caster wheel rotating part comprises at least two first link side plates and a braking plate connected between the first link side plates, the braking plate is fixed on the braking plate, a first clamping groove is formed in the middle of each first link side plate, and the fourth caster wheel fixing shaft is located in the first clamping groove when the vehicle brakes.

The second caster wheel rotating part comprises at least two second connecting rod side plates, the caster wheel brake pedal is connected to the second connecting rod side plates, second clamping grooves are formed in the second connecting rod side plates, and when the second caster wheel rotating part brakes, the third caster wheel fixing shaft can be abutted to the second clamping grooves, and the second connecting rod side plates are of V-shaped or arc-shaped structures.

The third trundle rotating part is of an L-shaped structure and comprises at least two third connecting rod side plates, and when in a brake release state, the trundle brake pedal can be propped against the trundle brake pedal.

The reset spring is sleeved on the second caster fixing shaft, one end of the reset spring is connected with the third caster fixing shaft or two ends of the reset spring are respectively connected with the first caster fixing shaft and the third caster fixing shaft.

Two connecting rod plates are rotatably connected between the third trundle fixing shaft and the fourth trundle fixing shaft.

A fifth caster rotating part is rotatably arranged between the second caster fixing shaft and the second sliding shaft.

The first clamping part comprises a fifth trundle fixing shaft arranged on the trundle bracket and a first sliding part rotatably connected with the first sliding shaft, a third sliding hole is formed in the first sliding part, the fifth trundle fixing shaft penetrates through the third sliding hole, and the first sliding shaft can drive the first sliding part to move.

The first clamping part further comprises a second sliding part which is slidably arranged on the first sliding part, the first sliding part is arranged on the second sliding part, a buffer spring is connected between the first sliding part and the second sliding part, the second clamping part comprises a plurality of grooves, the grooves are annularly arranged on the rotating part, the end part of the second sliding part is provided with an inserting part, and the inserting part can be inserted into one of the grooves to be fixed.

The first sliding part is provided with a fourth sliding hole, the second sliding part is provided with a fixing piece in a penetrating mode, the fixing piece is arranged in the fourth sliding hole in a penetrating mode, the fixing piece can slide along the fourth sliding hole, a bolt piece is fixedly arranged between the first sliding part and the second sliding part in a penetrating mode, and the bolt piece is sleeved with a buffer spring in a sleeved mode and is arranged in a sliding direction.

By adopting the technical scheme, the invention has the beneficial effects that:

according to the invention, the first caster fixing shaft, the second caster fixing shaft, the fourth caster fixing shaft and the third caster fixing shaft are respectively connected in pairs to form a quadrilateral four-bar structure, the caster bracket positions play a role in fixing, the first caster rotating part, the second caster rotating part and the third caster rotating part can be rotatably arranged and are mutually connected and supported, so that the large acting force of the rollers can be born, the stability is high, the deformation is not easy to occur even if the force of the feet is large, the brake pad can be tightly attached to the rollers, the rollers can not roll when the caster main body is under large acting, the braking effect is good, the brake pad can be used on large equipment and bear large objects, and the brake can be well carried out; meanwhile, the fourth caster rotating part can push the first clamping part to slide, the first clamping part can be clamped on the second clamping part to fix the rotating part, and the brake mechanism also has the function of fixing the caster rotating part of the caster main body and can prevent the caster main body from rotating; the structure can set the brake mechanism at the position of the caster bracket of the caster main body, which is close to the rear and middle bottom, does not occupy the space of the top of the caster main body, and can be suitable for most casters, in particular low-gravity center casters or casters with special structures; further, when the brake is applied, the fourth trundle fixing shaft is positioned in the first clamping groove, and when the trundle main body receives an acting force, the fourth trundle fixing shaft cannot be separated from the first clamping groove, so that the fixing effect is better; further, during braking, the third trundle fixing shaft can be abutted against the second clamping groove, the second clamping groove is used for positioning the third trundle fixing shaft, and the first clamping groove and the second clamping groove are arranged, so that the third trundle fixing shaft and the fourth trundle fixing shaft cannot move, and no matter how much acting force is applied to the trundle main body, the whole trundle main body can keep a braking state; further, the fifth caster rotating part is provided with supporting and guiding functions, and as the second sliding shaft slides in the second sliding hole, the second sliding shaft and the second sliding part can be prevented from inclining when sliding, and further the first sliding shaft can be prevented from inclining when sliding, deformation caused by overlarge stress of the second caster rotating part is prevented, the stability of the braking mechanism during operation is improved, various structures are better protected, and the braking effect of the whole braking mechanism is improved; further, the first sliding part moves in a sliding manner, one end of the first sliding part is rotatably connected to the first sliding shaft and is not fixed to the first sliding shaft, when the first sliding part receives a large acting force, the first sliding part can be adjusted in a tiny range according to the situation, the first sliding part is prevented from being blocked when sliding, the first sliding part can be supported by two points of the first sliding shaft and the fifth caster fixing shaft, the strength of the first sliding part is improved, and the first sliding part cannot deform even if the first sliding part receives a large steering force; further, when the plug part fails to go up the recess, buffer spring has the cushioning effect, prevents to appear the condition of clamping, and this kind of structure even the plug part fails to go up the recess, does not influence the brake block and supports and lean on the gyro wheel to brake, prevents that the condition that can't brake from taking place or hard the bump hard and cause wearing and tearing.

Drawings

Fig. 1 is a schematic diagram of a brake release state of a caster body according to an embodiment.

Fig. 2 is a front view of the first embodiment in a brake release state.

Fig. 3 is a schematic view of another angle of the brake release state according to the first embodiment.

Fig. 4 is a schematic diagram of the structures of the first caster turning portion, the second caster turning portion, and the third caster turning portion.

Fig. 5 is a front view of a braking state according to an embodiment.

Fig. 6 is a schematic structural diagram of a braking state according to an embodiment.

Fig. 7 is a schematic structural diagram of the second embodiment.

Fig. 8 is a schematic structural view of a hidden caster bracket according to the second embodiment.

Fig. 9 is a schematic diagram showing a structure of hiding the caster bracket and the caster rotating portion according to the second embodiment.

Fig. 10 is a partial structural schematic diagram of the second embodiment.

Fig. 11 is a partially exploded view of the second embodiment.

Fig. 12 is a schematic structural view of a first sliding portion and a second sliding portion of the second embodiment.

Fig. 13 is a schematic structural diagram of the second braking state of the embodiment.

Fig. 14 is a schematic partial structure of the second embodiment in a braking state.

Fig. 15 is a schematic view of another partial structure of the second braking state of the embodiment.

Fig. 16 is a schematic structural view of the third embodiment.

Fig. 17 is a partial structure diagram of the third embodiment.

Fig. 18 is a cross-sectional view of an embodiment three spring pin.

Fig. 19 is a partial structure diagram of the fourth embodiment.

Reference numerals illustrate:

the caster bracket 1, the first slide hole 11, the roller 2, the first caster fixing shaft 31, the second caster fixing shaft 32, the third caster fixing shaft 33, the fourth caster fixing shaft 34, the return spring 35, the link plate 36, the bushing 37, the first slide shaft 38, the second slide shaft 39, the first caster rotating portion 4, the brake pad 40, the first link side plate 41, the first locking groove 410, the brake plate 42, the brake bolt 43, the second caster rotating portion 5, the caster brake pedal 50, the second link side plate 51, the second locking groove 510, the second slide hole 52, the third caster rotating portion 6, the caster release pedal 60, the third link side plate 61, the fourth caster rotating portion 7, the rotating portion 8, the second locking portion 80, the first locking portion 9, the fifth caster fixing shaft 91, the first slide portion 92, the third slide hole 921, the fourth slide hole 922, the second slide portion 93, the insert portion 930, the buffer spring 94, the fixing member 95, the bolt 97member 96, the spring pin 97, the housing 971, the spring portion 2, the fifth pin 3, and the fifth caster 10.

Detailed Description

The invention will now be further described with reference to the drawings and detailed description.

Examples

Referring to fig. 1 to 6, the present embodiment provides a brake caster comprising a caster body including a caster bracket 1, a roller 2 rotatably provided on the caster bracket 1, a brake mechanism provided on the caster bracket 1, the brake mechanism including a first caster fixing shaft 31 and a second caster fixing shaft 32 provided on the caster bracket 1 in a penetrating manner, a first caster rotating portion 4 rotatably provided on the first caster fixing shaft 31, a third caster fixing shaft 33 provided on the first caster rotating portion 4 in a penetrating manner, a second caster rotating portion 5 provided on the second caster fixing shaft 32 in a rotatable manner, a fourth caster fixing shaft 34 provided on the second caster rotating portion 5 in a penetrating manner, a third caster rotating portion 6 provided between the third caster fixing shaft 33 and the fourth caster fixing shaft 34 in a rotatable manner, a caster brake pedal 50 provided on the second caster rotating portion 5, a caster brake pedal 60 provided on the third caster rotating portion 6, the caster brake pedal 60 being capable of being abutted against the second caster rotating portion 5, a brake pad 40 provided on the first caster rotating portion 4 being capable of being braked against the roller 2; the caster body is provided with a return spring 35, and the return spring 35 can fix the braking state and the releasing state of the caster body. The first caster rotating part 4 comprises two first link side plates 41 and a braking plate 42 connected between the first link side plates 41, the braking plate 40 is fixed on the braking plate 42, a first clamping groove 410 is arranged in the middle of the first link side plates 41, and the fourth caster fixing shaft 34 is positioned in the first clamping groove 410 during braking. The second caster rotating part 5 includes two second link side plates 51, the caster brake pedal 50 is connected to the second link side plates 51, the second link side plates 51 are provided with second clamping grooves 510, and the third caster fixing shaft 33 can abut against the second clamping grooves 510 when braking, and the second link side plates 51 are V-shaped. The third caster rotating portion 6 has an L-shaped structure, and the third caster rotating portion 6 includes two third link side plates 61, and in the brake release state, the caster brake pedal 60 can abut against the caster brake pedal 50. The return spring 35 is sleeved on the second caster fixing shaft 32, and both ends of the return spring 35 are respectively connected to the first caster fixing shaft 31 and the third caster fixing shaft 33.

A link plate 36 is rotatably connected between the third caster fixing shaft 33 and the fourth caster fixing shaft 34. The link plate 36 has the functions of improving strength and preventing friction, and when the third caster rotating portion 6 rotates, the link plate 36 can share the acting force borne by the third caster rotating portion 6, preventing the third caster rotating portion 6 from being worn or deformed. The number of the link plates 36 may be one, two, three or even more, or the link plates 36 may not be provided, particularly according to circumstances.

The fourth caster fixing shaft 34 and the fifth caster fixing shaft 91 are provided with a sleeve 37, and the sleeve 37 has the functions of positioning, friction resistance, strength improvement and stress balance. The collar 37 may not be provided, and the collar 37 may be provided on the first caster fixing shaft 31, the second caster fixing shaft 32, and the third caster fixing shaft 33, as the case may be. The first, second, third, fourth and fifth caster fixing shafts 31, 32, 33, 34, 91 may be bolt and nut structures, rod bodies or other structures, as the case may be. The number of the first link side plates 41 may be three or more, and two first link side plates 41 are preferably used, and are specifically set according to circumstances. The number of the second link side plates 51 may be three or more, and two second link side plates 51 are preferably used, and are specifically set according to circumstances. The number of the third link side plates 61 may be three or more, and two third link side plates 61 are preferably used, and are specifically set according to circumstances.

The return spring 35 may be connected to the third caster fixing shaft 33 at one end and not connected to the first caster fixing shaft 31 at the other end; the return spring 35 may be provided so as to be connected to the first caster fixing shaft 31 and the third caster fixing shaft 33, may be provided so as to be connected to the first caster fixing shaft 31 and the fourth caster fixing shaft 34, and may be provided so as to be connected to the second caster fixing shaft 32 and the fourth caster fixing shaft 34. The brake device can also be sleeved on the fourth caster fixing shaft 34 and respectively connected with the second caster fixing shaft 32 and the third caster fixing shaft 33, and other connection modes can also be adopted to enable the return spring 35 to fix the braking state and the releasing state of the caster body, and the brake device is specifically arranged according to the situation.

The third caster rotating portion 6 may be arc-shaped or have other shapes and configurations, as the case may be.

The second link side plate 51 may also have an arc shape or other shape, as the case may be.

The first embodiment works as follows:

when the caster body is braked, the caster brake pedal 50 is stepped on by the foot, the second caster rotating part 5 rotates downwards along the direction of the roller 2, the second caster rotating part 5 drives the third caster rotating part 6 to rotate through the fourth caster fixing shaft 34, the third caster rotating part 6 pushes the brake pad 40 of the first caster rotating part 4 to abut against the roller 2 to brake through the fourth caster fixing shaft 34, at this time, the axle center points of the first caster fixing shaft 31, the second caster fixing shaft 32, the fourth caster fixing shaft 34 and the third caster fixing shaft 33 can be sequentially connected into a quadrilateral, the inner angle positioned at the end point of the fourth caster fixing shaft 34 is larger than 180 degrees, the reset spring 35 pulls the second caster fixing shaft 32 and the third caster fixing shaft 33, so that the fourth caster fixing shaft 34 is pushed towards the direction of the roller 2, meanwhile, the fourth caster fixing shaft 34 is positioned in the first clamping groove 410, and the third caster fixing shaft 33 is positioned in the second clamping groove 510, the first clamping groove 410 and the second clamping groove 510 are arranged, so that the third caster fixing shaft 33 and the fourth caster fixing shaft 34 cannot move, and the whole caster body can be kept in a braked state no matter how large the caster body receives force.

When the caster body is released and braked, the caster release and brake pedal 60 is stepped on by the foot, the third caster rotating part 6 rotates to change the positions of the third caster fixing shaft 33 and the fourth caster fixing shaft 34, so that the inner angle of the end point of the fourth caster fixing shaft 34 is smaller than 180 degrees, the return spring 35 pulls the second caster fixing shaft 32 and the third caster fixing shaft 33, so that the fourth caster fixing shaft 34 is pushed away from the roller 2 until the caster release and brake pedal 60 abuts against the second caster rotating part 5, the brake block 40 is separated from the roller 2, and the return spring 35 has a positioning function, so that the caster release and brake pedal 60 can firmly abut against the second caster rotating part 5.

In this structure, the first caster fixing shaft 31, the second caster fixing shaft 32, the third caster fixing shaft 33 and the fourth caster fixing shaft 34 are connected to form a quadrangular connecting rod structure by changing the pushing direction of the fourth caster fixing shaft 34 for braking and braking fixation, so that the rotation stability is high, even if the force applied by the feet is large, the roller 2 can not be tightly attached to the brake pad 40, even if the caster body receives a large force, the roller 2 can not roll, the braking effect is good, the device can be used for large equipment and bear a large object, and the brake can be well performed.

Examples

Referring to fig. 1 to 15, the main difference between the second embodiment and the first embodiment is that: the caster bracket 1 of the second embodiment is provided with two first sliding holes 11, a first sliding shaft 38 is slidably arranged between the two first sliding holes 11, two second sliding holes 52 are arranged on the second caster rotating part 5, a second sliding shaft 39 is slidably arranged between the two second sliding holes 52, and a fourth caster rotating part 7 is rotatably connected between the first sliding shaft 38 and the second sliding shaft 39; the first sliding shaft 38 is provided with a first clamping part 9, the caster body comprises a rotating part 8, the rotating part 8 is provided with a second clamping part 80, and when the brake is applied, the first clamping part 9 can be clamped on the second clamping part 80 to fix the rotating part 8. A fifth caster rotating portion 10 is rotatably provided between the second caster fixing shaft 32 and the second slide shaft 39. The first clamping portion 9 includes a fifth caster fixing shaft 91 provided on the caster bracket 1, and a first sliding portion 92 rotatably connected to the first sliding shaft 38, a third sliding hole 921 is provided on the first sliding portion 92, the fifth caster fixing shaft 91 is provided through the third sliding hole 921, and the first sliding shaft 38 can drive the first sliding portion 92 to move. The first clamping portion 9 further includes a second sliding portion 93 slidably disposed on the first sliding portion 92, the first sliding portion 92 is disposed on the second sliding portion 93, a buffer spring 94 is connected between the first sliding portion 92 and the second sliding portion 93, the second clamping portion 80 includes a plurality of grooves (not labeled in the drawing, those skilled in the art will understand the arrangement of the grooves), the plurality of grooves are annularly disposed on the rotating portion 8, an inserting portion 930 is disposed at an end portion of the second sliding portion 93, and the inserting portion 930 can be inserted into one of the grooves to be fixed. The first sliding portion 92 is provided with a fourth sliding hole 922, the second sliding portion 93 is provided with a fixing piece 95 in a penetrating mode, the fixing piece 95 is arranged in the fourth sliding hole 922 in a penetrating mode, the fixing piece 95 can slide along the fourth sliding hole 922, a bolt 96 is fixedly arranged between the first sliding portion 92 and the second sliding portion 93 in a penetrating mode, the buffer spring 94 is sleeved on the bolt 96, and the bolt 96 is arranged along the sliding direction of the first sliding shaft 38.

The first engaging portion 9 may be fixed to the rotating portion 8, that is, the first sliding portion 92 may be fixed to the rotating portion 8 so as not to rotate, and thus the first sliding portion 92 may not be adjusted adaptively according to circumstances, and may be deformed or worn, and at this time, the fifth caster fixing shaft 91 may not be provided, specifically according to circumstances. The grooves may also be replaced by holes or other structures, and are specifically arranged according to the situation. The second sliding portion 93 may be provided in a non-slidable structure or without the second sliding portion 93, and when the insert portion 930 fails to press the upper groove, the caster brake pedal 50 is difficult to press down, which may cause wear or even damage.

The working mode of the second embodiment is as follows:

when the brake is applied, the second caster rotating portion 5 rotates, the second sliding shaft 39 slides to the end of the second sliding hole 52, the second caster rotating portion 5 drives the second sliding shaft 39 to move in an obliquely upward direction away from the roller 2, the rear end of the fourth caster rotating portion 7 is driven to rotate in an obliquely upward direction, and the front end of the fourth caster rotating portion 7 can only move horizontally along the first sliding shaft 38, so that a forward force is applied to the first sliding shaft 38, the first sliding shaft 38 slides forward, and the first sliding portion 92 slides forward, so that the insertion portion 930 is inserted into the groove.

During brake release, the second pin wheel rotating part 5 rotates, the second sliding shaft 39 slides to the other end part of the second sliding hole 52, and the second pin wheel rotating part 5 drives the second sliding shaft 39 to move towards the obliquely lower direction of the roller 2, so that a force is applied to the first sliding shaft 38 backwards, the first sliding shaft 38 slides backwards, and the first sliding part 92 slides backwards, so that the inserting part 930 is separated from the groove.

The axle center points of the first sliding shaft 38, the second sliding shaft 39 and the second foot wheel fixing shaft 32 are sequentially connected to form a triangle, wherein the distance between the first sliding shaft 38 and the second sliding shaft 39 is fixed, the axle center points of the first sliding shaft 38, the second sliding shaft 39 and the second foot wheel fixing shaft 32 are in the same straight line at a certain moment in the process of braking and braking rotation, and the triangle is adopted, so that the stability is good, and the fixing effect is better. The second caster rotating part 5, the fourth caster rotating part 7 and the first sliding part 92 can be regarded as connecting rod structures which are connected in sequence, the connecting rod structures are adopted to rotate, the stability is good, the whole brake mechanism adopts a multi-connecting rod structure, one connecting rod drives the other connecting rod to move, the rings are buckled, and the mutual supporting effect is achieved, so that the pressure resistance of the brake mechanism and the stability in the brake process are greatly improved.

Examples

Referring to fig. 1 to 18, the main difference between the third embodiment and the second embodiment is that: the first clamping portion 9 of the third embodiment is a spring pin 97, the spring pin 97 includes a housing 971 fixed to the first sliding shaft 38, a spring portion 972 provided in the housing 971, and a pin 973 connected to the spring portion 972, the pin 973 is slidably provided in the housing 971, the second clamping portion 80 includes a plurality of slots, and the pin 973 can be inserted into the slots (not labeled in the figure, and a person skilled in the art will understand the arrangement of the slots).

The spring pin 97 may be replaced by a cylindrical pin, a plate-shaped pin, a block-shaped pin, or other structures, which are well known components and will not be described in detail herein. The caster brake pedal 60 and the caster brake pedal 50 of the third embodiment are disposed up and down, and the caster brake pedal 60 and the caster brake pedal 50 of the first and second embodiments may also adopt this structure; the caster brake pedal 60 and the caster brake pedal 50 of the first and second embodiments are arranged in the left-right direction, and the third embodiment can adopt the structure; the two are different in appearance, but the braking effect is the same.

The structure of the third embodiment is simpler and less costly than the second embodiment, but the first clamping portion 9 is only supported by the first sliding shaft 38, and when the first clamping portion 9 receives a larger force from the rotating portion 8, deformation or even damage may occur.

Examples

Referring to fig. 1 to 19, the main difference between the fourth embodiment and the second embodiment is that: in the fourth embodiment, the brake bolts 43 are used instead of the brake pads 40 of the second embodiment, and a plurality of brake slots (not labeled in the figure, those skilled in the art will understand the arrangement of the brake slots) are provided at the ends of the brake bolts 43.

The brake pad 40 and the brake bolt 43 may be replaced by a brake pad or other components capable of braking the roller 2, and the brake pad and the brake bolt are specifically set according to circumstances.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a brake truckle, includes truckle main part, its characterized in that: the novel bicycle wheel brake device comprises a wheel body and is characterized in that the wheel body comprises a wheel support (1), a wheel (2) rotatably arranged on the wheel support (1) and a brake mechanism arranged on the wheel support (1), the brake mechanism comprises a first wheel fixing shaft (31) and a second wheel fixing shaft (32) which are arranged on the wheel support (1) in a penetrating mode, a first wheel rotating part (4) rotatably arranged on the first wheel fixing shaft (31), a third wheel fixing shaft (33) penetrating through the first wheel rotating part (4), a second wheel rotating part (5) rotatably arranged on the second wheel fixing shaft (32) and a fourth wheel fixing shaft (34) penetrating through the second wheel fixing shaft (5), a third wheel rotating part (6) is rotatably arranged between the third wheel fixing shaft (33) and the fourth wheel fixing shaft (34), a brake pedal (50) is arranged on the second wheel rotating part (5), a wheel brake releasing pedal (60) is arranged on the third wheel rotating part (6), a brake block (40) is arranged on the first wheel rotating part (4), and the wheel rotating part can be rotatably provided with a brake block (40) against the wheel (2); the caster comprises a caster body, wherein the caster body is provided with at least one reset spring (35), the reset spring (35) is connected with two, three or four of a first caster fixing shaft (31), a second caster fixing shaft (32), a third caster fixing shaft (33) and a fourth caster fixing shaft (34), and the reset spring (35) can fix the braking state and the releasing state of the caster body; the caster comprises a caster bracket (1), wherein at least two first sliding holes (11) are formed in the caster bracket, a first sliding shaft (38) is slidably arranged in the first sliding holes (11), at least two second sliding holes (52) are formed in a second caster rotating part (5), a second sliding shaft (39) is slidably arranged in the second sliding holes (52), and a fourth caster rotating part (7) is rotatably connected between the first sliding shaft (38) and the second sliding shaft (39); the first sliding shaft (38) is provided with a first clamping part (9), the caster body comprises a rotating part (8), the rotating part (8) is provided with a second clamping part (80), and the first clamping part (9) can be clamped in the second clamping part (80) to fix the rotating part (8) during braking; the first caster rotating part (4) comprises at least two first link side plates (41) and a braking plate (42) connected between the first link side plates (41), the braking block (40) is fixed on the braking plate (42), a first clamping groove (410) is formed in the middle of each first link side plate (41), and the fourth caster fixing shaft (34) is positioned in the first clamping groove (410) during braking; the second caster rotating part (5) comprises at least two second connecting rod side plates (51), the caster brake pedal (50) is connected to the second connecting rod side plates (51), second clamping grooves (510) are formed in the second connecting rod side plates (51), and when the second caster rotating part brakes, the third caster fixing shaft (33) can be abutted against the second clamping grooves (510), and the second connecting rod side plates (51) are of V-shaped or arc-shaped structures; the third trundle rotating part (6) is of an L-shaped structure, the third trundle rotating part (6) comprises at least two third connecting rod side plates (61), and when in a brake release state, the trundle brake pedal (60) can be abutted against the trundle brake pedal (50).

2. A brake castor according to claim 1, wherein: the return spring (35) is sleeved on the second caster fixing shaft (32), one end of the return spring (35) is connected with the third caster fixing shaft (33) or two ends of the return spring (35) are respectively connected with the first caster fixing shaft (31) and the third caster fixing shaft (33).

3. A brake castor according to claim 1, wherein: a fifth caster rotating part (10) is rotatably arranged between the second caster fixing shaft (32) and the second sliding shaft (39).

4. A brake castor according to claim 1, wherein: the first clamping portion (9) comprises a fifth trundle fixing shaft (91) arranged on the trundle bracket (1) and a first sliding portion (92) rotatably connected to the first sliding shaft (38), a third sliding hole (921) is formed in the first sliding portion (92), the fifth trundle fixing shaft (91) penetrates through the third sliding hole (921), and the first sliding shaft (38) can drive the first sliding portion (92) to move.

5. A brake caster as defined in claim 4, wherein: the first clamping part (9) further comprises a second sliding part (93) slidably arranged on the first sliding part (92), the first sliding part (92) is arranged on the second sliding part (93), a buffer spring (94) is connected between the first sliding part (92) and the second sliding part (93), the second clamping part (80) comprises a plurality of grooves, the grooves are annularly arranged on the rotating part (8), and an inserting part is arranged at the end part of the second sliding part (93) and can be inserted into one of the grooves for fixing.

6. A brake caster as defined in claim 5, wherein: be equipped with fourth slide hole (922) on first sliding part (92), wear to establish mounting (95) on second sliding part (93), mounting (95) wear to locate fourth slide hole (922), mounting (95) can slide along fourth slide hole (922), wear to establish between first sliding part (92) and second sliding part (93) and fix a bolt piece (96), buffer spring (94) cover is located bolt piece (96), bolt piece (96) are along the slip direction setting.