Universal wheel linkage brake device not influenced by advancing direction

Abstract

The utility model discloses a universal wheel linkage brake device not affected by the advancing direction. The universal wheel linkage brake device comprises a support structure, a universal wheel assembly, a brake disc assembly and a brake assembly. When a user applies an acting force to the brake assembly, the brake assembly drives the brake disc assembly to move in a guide hole in the guide sleeve; due to the fact that one part of the brake disc is located over one part of the universal wheel all the time, in the process that the universal wheel moves forwards in any direction, the brake disc can make contact with the universal wheel all the time when moving downwards, movement of the universal wheel is limited, and the braking function of the cart is achieved. On the basis of the structural design, compared with the prior art that a brake structure is arranged on a universal wheel, the brake device is not influenced by the advancing direction of the universal wheel when achieving the brake function, and no matter which rotating direction the universal wheel is located, the brake disc can make contact with the universal wheel to achieve the brake function; the device is mainly applied to a cart with universal wheels, in particular to a baby carriage.

Description

Technical Field

[0001] The utility model relates to the technical field of universal wheels, in particular to a universal wheel linked brake device which is not affected by the traveling direction. Background Art

[0002] like Figure 1 As shown, universal casters with brakes are a common product on the market. However, since the brake plate of such universal casters moves with the direction of the universal caster, and each universal caster can only have one brake, it is not possible to brake two universal casters at the same time. This brings inconvenience and affects safety.

[0003] For example, the universal wheel under the flatbed cart. When the cart is moving forward, the brake plate is located in the opposite direction of the forward direction and is under the flatbed. The user's feet cannot reach under the flatbed and cannot brake. Utility Model Content

[0004] In response to the above-mentioned defects in the prior art, a universal wheel linked brake device is provided that is not affected by the direction of travel, so that the direction of travel of the brake is not affected by the forward direction of the universal wheel. The device is mainly used in strollers with universal wheels, especially baby strollers.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] The universal wheel linkage brake device is not affected by the direction of travel, and is characterized by:

[0007] The bracket structure is provided with a vertically arranged guide sleeve, a guide hole is provided in the middle of the guide sleeve, and an annular groove is provided on the outer side of the guide sleeve, and the guide hole and the annular groove are arranged coaxially;

[0008] A universal wheel assembly, the universal wheel assembly is rotatably mounted on the annular groove, a universal wheel is provided in the universal wheel assembly, and the universal wheel rotates on a horizontal plane perpendicular to the axis;

[0009] The brake disc assembly is arranged in the guide hole, and a horizontally arranged brake disc is provided at the bottom of the brake disc assembly; the brake disc moves up and down in the guide hole along with the brake disc assembly, and a part of the brake disc is always located directly above a part of the universal wheel;

[0010] The brake assembly is connected to the brake disc assembly to control the brake disc assembly to move up and down in the axial direction of the guide hole to achieve braking of one or more universal wheel assemblies.

[0011] According to the above technical solution, the brake disc assembly includes a brake rod that matches the size of the guide hole, a brake cap located at the top of the brake rod, a brake disc located at the bottom of the brake rod, and a first return spring mounted on the outside of the guide sleeve; the brake cap is squeezed by the brake assembly and cooperates with the first return spring to realize the up and down movement of the brake disc, brake rod and brake cap.

[0012] According to the above technical solution, the brake assembly includes a cam structure rotatably connected to the bracket and a driving unit that drives the cam structure to rotate. The cam structure includes a cam, a camshaft and a cam arm. An axial hole is provided on the bracket, and the camshaft is provided in the axial hole; the cam and the cam arm are both fixed on the camshaft, and are arranged at a certain angle between the two; the cam is located directly above the brake cap and is attached to the brake cap; the driving unit is connected to the cam arm; in the process of the cam rotating with the camshaft, the cam pushes the brake cap to move downward.

[0013] According to the above technical solution, on the cart, the camshafts of the brake assemblies corresponding to the two universal wheel assemblies in the same row are fixedly connected as an integral part; and the braking of the two universal wheel assemblies in the same row is achieved by a driving unit.

[0014] According to the above technical solution, the driving unit and the cam arm are replaced by a shift lever, which is fixedly connected to the camshaft. The person pushing the cart drives the rotation of the camshaft by shifting the shift lever with his hands or feet.

[0015] According to the above technical solution, the drive unit includes a brake cable, a brake pipe, a brake pipe fixing seat, a second return spring, and a rotating handle mechanism; one end of the brake cable is fixedly connected to the rotating handle mechanism, and the other end is fixedly connected to the cam arm; the brake pipe is sleeved on the brake cable and serves as a guide structure for the brake cable; the two ends of the brake pipe are respectively fixed between two brake pipe fixing seats, and the two brake pipe fixing seats are respectively arranged on a bracket near the cam arm and a bracket near the rotating handle mechanism; the second return spring is sleeved on the brake cable between the cam arm and the brake pipe fixing seat closest to it.

[0016] According to the above technical solution, the handle rotation mechanism includes a handle and a handle connecting seat; the handle connecting seat is fixed on a bracket within the range of the pusher's arm movement, and the handle is rotatably connected to the handle connecting seat; when the handle rotates toward the pusher, the brake line is pulled.

[0017] According to the above technical solution, the rotating handle mechanism includes a handle and a handle connecting bracket, and the handle connecting bracket is provided with an arc-shaped rotating groove and a locking groove that are interconnected, and the locking groove is located at the end of the rotating groove close to the cart pusher; a connecting shaft is provided on the handle connecting bracket, and the handle is rotatably connected to the connecting shaft, and the handle has a certain axial movement along the connecting shaft on the connecting shaft, and the range of axial movement matches the width of the connection between the locking groove and the arc-shaped rotating groove.

[0018] According to the above technical solution, the universal wheel assembly also includes a wheel frame, a wheel axle, and a steel ball. The universal wheel is rotatably connected to the wheel frame through the wheel axle. A rotating hole is provided on one side of the top of the wheel frame, and a circle of rotating grooves is provided on the outside of the rotating hole. The size of the rotating groove matches the size of the steel ball. The wheel frame is arranged in the annular groove of the guide sleeve through the rotating hole, the bottom of the steel ball fits in the rotating groove, and the top of the steel ball fits in the annular groove.

[0019] According to the above technical solution, the bracket structure also includes a rectangular frame, a limiting ring, and a fixed component mounting seat. The rectangular frame is installed on the main structure of the external cart, the guide sleeve is fixed on the lower base plate of the rectangular frame, and the top and bottom of the guide sleeve protrude from the upper surface and lower surface of the lower base plate respectively; the limiting ring is fixed on the bottom of the outer wall of the guide sleeve, and the annular groove is formed between the limiting ring and the lower base plate; the fixed component mounting seat is arranged on the upper base plate.

[0020] The utility model has the following beneficial effects:

[0021] 1. When a user applies force to the brake assembly, the brake assembly drives the brake disc assembly to move within the guide hole in the guide sleeve. Because a portion of the brake disc is always located directly above a portion of the universal wheel, the brake disc can always contact the universal wheel when moving downward during the process of the universal wheel moving in any direction, thereby limiting the movement of the universal wheel and achieving the braking function of the stroller. Based on the above structural design, compared with the prior art of providing a brake structure on the universal wheel, the brake device described in this application is not affected by the forward direction of the universal wheel when achieving the braking function. Regardless of the rotation direction of the universal wheel, the brake disc can contact the universal wheel and perform the braking function. This device is mainly used in strollers with universal wheels, especially children's strollers.

[0022] 2. Set up a variety of drive unit structures to meet the needs of various usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The utility model provides an embodiment of the existing universal wheel brake device;

[0024] Figure 2 This is a schematic diagram of the structure of the embodiment provided by the utility model Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the structure of the embodiment provided by the utility model Figure 2 ;

[0026] Figure 4 This is a structural diagram of the cam structure of an embodiment provided by the utility model;

[0027] Figure 5This is a structural diagram of a rotating handle mechanism provided in an embodiment of the utility model;

[0028] Figure 6 This is a structural diagram of another rotating handle mechanism provided in an embodiment of the present utility model;

[0029] Figure 7 This is a schematic structural diagram of the universal wheel structure provided in an embodiment of the present utility model;

[0030] Figure 8 This is a schematic structural diagram of a bracket structure according to an embodiment of the present invention;

[0031] In the figure, 1. bracket structure; 1-1. rectangular frame; 1-2. limiting ring; 1-3. fixing assembly mounting seat; 2. guide sleeve; 3. annular groove; 4. universal wheel assembly; 4-1. universal wheel; 4-2. wheel frame; 4-3. wheel axle; 4-4. steel ball; 5. brake disc assembly; 5-1. brake disc; 5-2. brake lever; 5-3. brake cap; 5-4. first return spring; 6. cam structure; 6-1. cam; 6-2. camshaft; 6-3. cam arm; 7. drive unit; 7-1. brake line; 7-2. brake pipe; 7-3. brake pipe fixing seat; 7-4. second return spring; 7-5. rotating handle mechanism; 7-51. handle; 7-52. handle connecting seat; 7-53. handle connecting bracket; 7-54. arc-shaped rotating groove; 7-55. locking groove; 7-56. connecting shaft; 8. main structure of the external cart. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0033] Reference Figures 2 to 8 As shown, the utility model provides a universal wheel linked brake device that is not affected by the traveling direction.

[0034] Example 1

[0035] The invention comprises a support structure 1, on which a vertically arranged guide sleeve 2 is provided, a guide hole is provided in the middle of the guide sleeve, and an annular groove 3 is provided on the outer side of the guide sleeve, and the guide hole and the annular groove are arranged coaxially;

[0036] A universal wheel assembly 4, which is rotatably mounted on the annular groove, and a universal wheel 4-1 is provided in the universal wheel assembly, and the universal wheel rotates on a horizontal plane perpendicular to the axis;

[0037] The brake disc assembly 5 is arranged in the guide hole, and a horizontally arranged brake disc 5-1 is provided at the bottom of the brake disc assembly; the brake disc moves up and down in the guide hole along with the brake disc assembly, and a part of the brake disc is always located directly above a part of the universal wheel;

[0038] Braking assemblies 6 and 7 are connected to the brake disc assembly to control the brake disc assembly to move up and down in the axial direction of the guide hole to achieve braking of one or more universal wheel assemblies.

[0039] In this embodiment, when a user applies force to the brake assembly, the brake assembly drives the brake disc assembly to move within the guide hole in the guide sleeve. Because a portion of the brake disc is always located directly above a portion of the universal wheel, the brake disc can always contact the universal wheel when moving downward during the process of the universal wheel moving in any direction, thereby limiting the movement of the universal wheel and achieving the braking function of the stroller. Based on the above structural design, compared with the prior art of providing a brake structure on the universal wheel, the brake device described in this application is not affected by the forward direction of the universal wheel when achieving the braking function. It is mainly used in strollers with universal wheels, especially children's strollers.

[0040] Example 2

[0041] The structure and principle of Example 2 are similar to those of Example 1, with the difference being that a preferred structural form of a brake disc assembly is provided, the brake disc assembly comprising a brake rod 5-2 matching the size of the guide hole, a brake cap 5-3 provided at the top end of the brake rod, a brake disc 5-1 provided at the bottom end of the brake rod, and a first return spring 5-4 sleeved on the outside of the guide sleeve; the brake cap is squeezed by the brake assembly, and the first return spring is cooperated to realize the up and down movement of the brake disc, brake rod and brake cap.

[0042] In this embodiment, the brake lever is positioned within the guide hole. The matching connection between the brake lever and the guide hole provides a limited and guided position for the entire brake disc assembly, allowing it to move up and down within the guide hole. Furthermore, a first return spring is positioned outside the guide sleeve. The brake assembly drives the brake cap downward, causing the brake disc to contact the universal wheel, thereby braking the universal wheel. During this process, the first return spring is compressed. When the brake assembly removes its force from the brake cap, the first return spring pushes it upward. At this point, the brake disc separates from the universal wheel, engaging the universal wheel and braking it.

[0043] In Example 2, a preferred structural form of the brake assembly is also given, which includes a cam structure 6 rotatably connected to the bracket, and a driving unit 7 for driving the cam structure to rotate. The cam structure includes a cam 6-1, a camshaft 6-2 and a cam arm 6-3. An axial hole is provided on the bracket, and the camshaft is provided in the axial hole; the cam and the cam arm are both fixed on the camshaft, and are arranged at a certain angle therebetween; the cam is located directly above the brake cap and is attached to the brake cap; the driving unit is connected to the cam arm; in the process of the cam rotating with the camshaft, the cam pushes the brake cap to move downward.

[0044] In this embodiment, the driving unit acts on the cam arm, indirectly driving the camshaft to rotate, and synchronously driving the cam to rotate around the camshaft; during the rotation of the cam, its vertical length increases, pushing the brake cap to move downward, thereby realizing the downward movement of the brake disc and fitting it with the universal wheel.

[0045] Example 3

[0046] The structure and principle of Example 3 are similar to those of Example 2, except that: in order to meet the requirements of synchronous linkage braking of two universal wheel assemblies in the same row; on the cart, the camshafts of the brake assemblies corresponding to the two universal wheel assemblies in the same row are fixedly connected as an integral part; and the braking of the two universal wheel assemblies in the same row is achieved by a drive unit.

[0047] Example 4

[0048] The structure and principle of Example 4 are similar to those of Example 2, differing in that a drive unit structure is provided. In this embodiment, the cam arm, which does not function in Example 2, is eliminated. The drive unit and cam arm are replaced by a lever fixedly connected to the camshaft. The pusher manually or foot-operated on the lever to drive the camshaft.

[0049] Example 5

[0050] The structure and principle of Example 5 are similar to those of Example 2, except that: another structural form of a driving unit is provided, the driving unit including a brake line 7-1, a brake pipe 7-2, a brake pipe fixing seat 7-3, a second return spring 7-4, and a rotating handle mechanism 7-5; one end of the brake line is fixedly connected to the rotating handle mechanism, and the other end is fixedly connected to the cam arm; the brake pipe is sleeved on the brake line as a guide structure for the brake line; the two ends of the brake pipe are respectively fixed between two brake pipe fixing seats, and the two brake pipe fixing seats are respectively arranged on a bracket near the cam arm and a bracket near the rotating handle mechanism; the second return spring is sleeved on the brake line between the cam arm and the brake pipe fixing seat closest to it.

[0051] In this embodiment, the person pushing the cart applies a force to the rotating handle mechanism, which pulls the brake wire to rotate the cam arm, thereby driving the brake disc downward to contact the universal wheel, thereby achieving the braking function.

[0052] There are many forms of rotating handle mechanisms, and two common forms are given in this embodiment.

[0053] The first type: A rotating handle mechanism includes a handle 7-51 and a handle connector 7-52. The connector is fixed to a bracket within the pusher's arm range, and the handle is rotatably connected to the connector. When the handle is rotated toward the pusher, the brake cable is pulled. In this embodiment, the rotating handle mechanism is similar to a conventional bicycle brake handle and immediately resets when the external force is removed.

[0054] The second type: The rotating handle mechanism includes a handle 7-51 and a handle connecting bracket 7-53. The handle connecting bracket is provided with an interconnected arc-shaped rotating groove 7-54 and a locking groove 7-55. The locking groove is located at the end of the rotating groove closest to the pusher. The handle connecting bracket is provided with a connecting shaft 7-56. The handle is rotatably connected to the connecting shaft. The handle has a certain axial movement along the connecting shaft, and the range of axial movement matches the width of the connection between the locking groove and the arc-shaped rotating groove. In this embodiment, the rotating handle mechanism is provided with a locking groove. When the handle is engaged with the locking groove, the universal wheel assembly is fixed in the braking state, meeting the pusher's need to temporarily park the cart in a fixed location.

[0055] In Examples 1-5, a common universal wheel assembly structure is provided, which can be replaced with other common universal wheel assembly structures. The universal wheel assembly also includes a wheel frame 4-2, a wheel axle 4-3, and a steel ball 4-4. The universal wheel is rotatably connected to the wheel frame via the wheel axle. A rotation hole is provided on one side of the top of the wheel frame, and a rotation groove is provided around the outer side of the rotation hole. The size of the rotation groove matches the size of the steel ball. The wheel frame is mounted within the annular groove of the guide sleeve through the rotation hole. The bottom of the steel ball fits into the rotation groove, and the top of the steel ball fits into the annular groove.

[0056] In Examples 1-5, a preferred form of bracket structure is provided, and the bracket can be adjusted for suitability according to usage requirements. The bracket structure also includes a rectangular frame 1-1, a retaining ring 1-2, and a fixed component mounting seat 1-3. The rectangular frame is mounted on the main structure 8 of the external cart. The guide sleeve is fixedly mounted on the lower base plate of the rectangular frame, and the top and bottom of the guide sleeve protrude from the upper and lower surfaces of the lower base plate, respectively. The retaining ring is fixedly mounted on the bottom of the outer wall of the guide sleeve, and the retaining ring and the lower base plate form the annular groove. The fixed component mounting seat is mounted on the upper base plate.

[0057] This is the working principle and process of the utility model (with Figure 2 For example):

[0058] The user applies force to the handle with their hand, rotating it away from the brake cable, which in turn drives the cam arm toward the cable. As the cam arm rotates toward the cable, the second return spring is compressed, and the camshaft rotates, squeezing the brake nut. The cam's compressive force causes the brake nut to move downward, driving the brake lever and brake disc, which are fixed to it, to move downward synchronously, compressing the first return spring. Once the brake disc contacts the caster, the caster is braked.

[0059] When the user releases the handle, the compressed return spring pushes the cam arm open, pulling the brake cable and handle back to their original position. Simultaneously, the cam and brake cap are lifted by the first return spring, causing the brake disc to move upward and separate from the caster, releasing the brake on the caster.

[0060] The above are merely preferred embodiments of the present invention and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope of protection of the present invention.

Claims

1. A universal wheel linkage brake device that is not affected by the direction of travel, characterized by: include The bracket structure is provided with a vertically arranged guide sleeve, a guide hole is provided in the middle of the guide sleeve, and an annular groove is provided on the outer side of the guide sleeve, and the guide hole and the annular groove are arranged coaxially; A universal wheel assembly, the universal wheel assembly is rotatably mounted on the annular groove, a universal wheel is provided in the universal wheel assembly, and the universal wheel rotates on a horizontal plane perpendicular to the axis; The brake disc assembly is arranged in the guide hole, and a horizontally arranged brake disc is provided at the bottom of the brake disc assembly; the brake disc moves up and down in the guide hole along with the brake disc assembly, and a part of the brake disc is always located directly above a part of the universal wheel; The brake assembly is connected to the brake disc assembly to control the brake disc assembly to move up and down in the axial direction of the guide hole to achieve braking of one or more universal wheel assemblies.

2. The universal wheel linked brake device not affected by the direction of travel according to claim 1, characterized in that: The brake disc assembly includes a brake rod that matches the size of the guide hole, a brake cap located at the top of the brake rod, a brake disc located at the bottom of the brake rod, and a first return spring mounted on the outside of the guide sleeve; the brake cap is squeezed by the brake assembly and cooperates with the first return spring to realize the up and down movement of the brake disc, brake rod and brake cap.

3. The universal wheel linked brake device not affected by the direction of travel according to claim 2, characterized in that: The brake assembly includes a cam structure rotatably connected to a bracket and a driving unit for driving the cam structure to rotate. The cam structure includes a cam, a camshaft and a cam arm. An axial hole is provided on the bracket, and the camshaft is provided in the axial hole. The cam and the cam arm are both fixed on the camshaft, and are arranged at a certain angle therebetween. The cam is located directly above the brake cap and is attached to the brake cap. The driving unit is connected to the cam arm. As the cam rotates with the camshaft, the cam pushes the brake cap to move downward.

4. The universal wheel linked brake device not affected by the direction of travel according to claim 3, characterized in that: On the cart, the camshafts of the brake assemblies corresponding to the two universal wheel assemblies in the same row are fixedly connected as an integral part; and the braking of the two universal wheel assemblies in the same row is achieved by a driving unit.

5. The universal wheel linked brake device not affected by the direction of travel according to claim 3, characterized in that: The driving unit and the cam arm are replaced by a lever, which is fixedly connected to the camshaft. The person pushing the cart drives the camshaft to rotate by pushing the lever with his hands or feet.

6. The universal wheel linked brake device not affected by the direction of travel according to claim 3, characterized in that: The driving unit includes a brake cable, a brake pipe, a brake pipe fixing seat, a second return spring, and a rotating handle mechanism; one end of the brake cable is fixedly connected to the rotating handle mechanism, and the other end is fixedly connected to the cam arm; the brake pipe is sleeved on the brake cable and serves as a guide structure for the brake cable; the two ends of the brake pipe are respectively fixed between two brake pipe fixing seats, and the two brake pipe fixing seats are respectively arranged on a bracket near the cam arm and a bracket near the rotating handle mechanism; the second return spring is sleeved on the brake cable between the cam arm and the brake pipe fixing seat closest to it.

7. The universal wheel linked brake device not affected by the direction of travel according to claim 6, characterized in that: The handle rotation mechanism includes a handle and a handle connecting seat; the handle connecting seat is fixed on a bracket within the range of the pusher's arm movement, and the handle is rotatably connected to the handle connecting seat; when the handle rotates toward the pusher, the brake line is pulled.

8. The universal wheel linked brake device not affected by the direction of travel according to claim 6, characterized in that: The rotating handle mechanism includes a handle and a handle connecting bracket. The handle connecting bracket is provided with an arc-shaped rotating groove and a locking groove that are interconnected. The locking groove is located at the end of the rotating groove close to the person pushing the cart; a connecting shaft is provided on the handle connecting bracket, and the handle is rotatably connected to the connecting shaft. The handle has the ability to move axially along the connecting shaft on the connecting shaft, and the range of axial movement matches the width of the connection between the locking groove and the arc-shaped rotating groove.

9. The universal wheel linked brake device not affected by the traveling direction according to any one of claims 1 to 8, characterized in that: The universal wheel assembly also includes a wheel frame, a wheel axle, and a steel ball. The universal wheel is connected to the wheel frame through the rotation of the wheel axle. A rotating hole is provided on one side of the top of the wheel frame, and a circle of rotating grooves is provided on the outside of the rotating hole. The size of the rotating groove matches the size of the steel ball. The wheel frame is set in the annular groove of the guide sleeve through the rotating hole, the bottom of the steel ball fits in the rotating groove, and the top of the steel ball fits in the annular groove.

10. The universal wheel linked brake device not affected by the traveling direction according to any one of claims 1 to 8, characterized in that: The bracket structure also includes a rectangular frame, a limiting ring, and a fixed component mounting seat. The rectangular frame is installed on the main structure of the external cart. The guide sleeve is fixed on the lower base plate of the rectangular frame, and the top and bottom of the guide sleeve protrude from the upper surface and lower surface of the lower base plate respectively; the limiting ring is fixed on the bottom of the outer wall of the guide sleeve, and the annular groove is formed between the limiting ring and the lower base plate; the fixed component mounting seat is arranged on the upper base plate.

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