An autonomous braking universal caster structure

Abstract

The present invention discloses a universal caster structure with autonomous braking, aiming to provide a universal caster structure with autonomous braking. It includes a rotating column, a connecting block and a roller. A placement groove is provided at the bottom of the connecting block, and the roller is placed in the placement groove. Both ends of the roller are rotatably connected to both sides of the placement groove. A fixing mechanism is provided on the roller, and the fixing mechanism is connected to the roller. One end of the roller penetrates through the connecting block and is located outside the connecting block. An overspeed fixing assembly is provided at the end of the roller located outside the connecting block, and the overspeed fixing assembly is connected to the roller. The upper end of the connecting block is connected to the rotating column. The beneficial effects of the present invention are: it can automatically brake when the universal caster speed is too fast, achieve better braking, prevent the fixing block from bouncing back, automatically release the fixation, reduce the speed of the universal wheel when going downhill, achieve the fixation when the roller is stationary, ensure the reliability of the fixation, is relatively convenient to turn, achieve the overall fixation, and can protect the caster.

Description

Technical Field

[0001] The present invention relates to the technical field related to universal casters, and particularly to a structure of a universal caster with autonomous braking. Background Art

[0002] In the prior art, casters can usually be installed on small transport vehicles or heavy objects such as furniture that need to be moved. Among the casters, there are universal casters, which are widely used because they can change multiple directions. The universal casters have better flexibility. When using a heavy object equipped with universal casters, when encountering a plane with a relatively large slope, due to the flexibility of the universal casters, the heavy object often slips out of the hand. After slipping out, the heavy object slides autonomously driven by the casters. If the slope is relatively large, as the heavy object moves, the speed will become faster and faster, which will pose a greater safety hazard. Therefore, there is a greater safety hazard when the universal casters in the prior art slip out on a steep slope.

[0003] Chinese Patent Grant Publication No.: CN2839005Y, Grant Publication Date: November 22, 2006, discloses a braking caster, which includes an insertion rod. The insertion rod is movably installed with a bracket through upper and lower wave discs. The bracket is sleeved with a roller through a wheel shaft. The characteristics are that: a braking block is fixedly installed at the lower end of the insertion rod, a pedal that can drive the roller to tightly press on the braking block is hinged on the bracket, a long hole for the left and right movement of the wheel shaft is arranged on the bracket, and a strip-shaped hole for the up and down movement of the wheel shaft is arranged on the pedal. The deficiency of this utility model is that when braking the caster, it can only be fixed in a fixed state, and it cannot solve the problem that there is a greater safety hazard when the universal caster slips out on a steep slope. Summary of the Invention

[0004] The present invention is to overcome the deficiency that there is a greater safety hazard when the universal caster slips out on a steep slope in the prior art, and provides a structure of a universal caster with autonomous braking that can automatically brake when the speed of the universal caster is too fast.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A structure of a universal caster with autonomous braking, including a rotating column, a connecting block and a roller. A placement groove is arranged at the bottom of the connecting block. The roller is placed in the placement groove. Both ends of the roller are rotatably connected to both sides of the placement groove. A fixing mechanism is arranged on the roller. The fixing mechanism is connected to the roller. One end of the roller penetrates through the connecting block and is placed outside the connecting block. A speed - over - limit fixing assembly is arranged at the end of the roller placed outside the connecting block. The speed - over - limit fixing assembly is connected to the roller. The upper end of the connecting block is connected to the rotating column.

[0007] The rotating column is rotatably connected to the connecting block, and the connecting block can rotate around the rotating column. A placement groove is opened on the connecting block, and a roller is installed in the placement groove. The roller is rotatably connected to the connecting block to move, and the connecting block can drive the roller to rotate around the rotating axis, thereby achieving the purpose of multi-directional rotation. Both ends of the roller are rotatably connected to the connecting block, and one end of the roller passes through the connecting block and is placed outside the connecting block. An overspeed fixing component is installed on this end. Under the action of the overspeed fixing component, when the speed of the roller is too fast, the overspeed fixing component works to fix the roller and stop it to prevent collision, thereby achieving the purpose of automatic braking when the speed of the universal caster is too fast.

[0008] Preferably, the overspeed fixing assembly comprises a rotating disk, a fixed block and a gear ring, the rotating disk is connected to one end of the roller placed on the outside of the connecting block, the rotating disk is provided with a plurality of sliding grooves 1, and the plurality of sliding grooves 1 are distributed circumferentially on the rotating disk, a sliding block 1 is provided at the bottom of the fixed block, the fixed block is connected to the sliding block 1, the fixed block is slidably connected to the rotating disk through the cooperation of the sliding block 1 and the sliding groove 1, the fixed block is provided with meshing teeth at one end facing the outside of the rotating disk, the meshing teeth are connected to the fixed block, the gear ring is placed on the outside of the rotating disk and connected to the connecting block, the meshing teeth correspond to the gear ring, the rotating disk is provided with a connecting column, the connecting column is placed at the axis of the rotating disk and connected to the rotating disk, the fixed block is provided with a spring 1, one end of the spring 1 is connected to the fixed block, and the other end of the spring 1 is connected to the connecting column. The rotating disk of the overspeed fixing mechanism is placed on the outside of the connecting block and connected to the roller, and the rotating disk is driven by the roller to rotate together, and a plurality of sliding grooves are provided on the rotating disk and are distributed in a circle with the axis of the rotating disk, and the sliding grooves are all toward the center of the rotating disk, and a sliding block is provided in the sliding groove, and the sliding block is connected to the fixed block, and the sliding block can drive the fixed block to slide in the sliding groove, and the outer end surface of the fixed block is provided with meshing teeth, and the meshing teeth are connected to the fixed block, and a gear ring is installed on the outer side of the rotating disk, and the gear ring is coaxial with the rotating disk, and the gear ring is installed on the connecting block and fixedly connected, and the meshing teeth of the fixed block correspond to the gear ring, and the fixed block is fixed. A spring is installed at the other end of the spring, which is connected to the fixed block, and the other end is connected to the connecting column on the axis of the rotating disk. The spring provides tension. When the universal caster moves normally, the sliding block is restricted in the sliding groove by the shaking. As the roller speed increases, the centrifugal force of the fixed block is greater than the tension of the spring, one end of the fixed block disengages from the sliding groove, and the meshing teeth on the fixed block mesh with the gear ring. Since the gear ring is fixed, the fixed block stops rotating. The fixed block is placed in the sliding groove, which can limit the rotation of the rotating disk, and the rotating disk drives the roller to stop, thereby achieving the effect of automatic braking when overspeeding. This design can achieve better braking.

[0009] Preferably, a placement hole is provided on the side surface of the fixed block. The placement hole penetrates both sides of the fixed block. Retaining rings are provided at both ends of the placement hole. The retaining rings are placed at the ports of the placement hole and are connected to the fixed block. Two clamping blocks are provided in the placement hole. The cross-sectional shape of the clamping block corresponds to that of the retaining ring. A baffle is provided at one end of the clamping block placed in the placement hole. The cross-sectional shape of the baffle corresponds to that of the placement hole. A second spring is provided in the placement hole. Both ends of the second spring are connected to the baffle of the clamping block. The outer side of the clamping block contacts the side surface of the first sliding groove on the rotating disk. A placement hole is formed on the side surface of the fixed block. The placement hole penetrates the fixed block. Retaining rings are installed at both ends of the placement hole. Two clamping blocks are installed inside the placement hole. The two clamping blocks respectively correspond to both ends of the placement hole. The shape of the clamping block corresponds to that of the retaining ring. The clamping block can slide in the placement hole and slide out from the retaining ring. A baffle is installed at the rear end of the clamping block. The baffle corresponds to the placement hole. A second spring is installed between the two clamping blocks. The presence of the baffle can prevent the clamping block from popping out of the placement hole. The second spring provides an outward elastic force for the clamping block. After one end of the fixed block slides out of the first sliding groove, the clamping block pops out under the action of the second spring to fix the fixed block. Such a design can prevent the fixed block from bouncing back.

[0010] Preferably, a number of rebound mechanisms are provided on the rotating disk. The rebound mechanism includes a clamping plate and a first pneumatic cylinder. There are two clamping plates. The two clamping plates are placed on both sides of the fixed block. The inner side of the clamping plate contacts the fixed block. The shape of the clamping plate is L-shaped. The clamping plate includes a bottom edge and a side edge. The bottom edge and the side edge are connected. A rotating shaft is provided on the inner side of the bottom edge. The rotating shaft is connected to the clamping plate. The rotating shaft is rotatably connected to the rotating disk. The inner side of the side edge contacts the side surface of the rotating disk. The outer side of the clamping plate is connected to the pneumatic shaft of the first pneumatic cylinder. The first pneumatic cylinder is installed on the rotating disk. A number of rebound mechanisms correspond to the fixed block one by one. The clamping plate of the rebound mechanism is rotatably connected to the rotating disk through a rotating shaft. One side of the clamping plate contacts the fixed block. The rotating shaft is placed at the bottom edge of the first sliding groove. The clamping plate can rotate around the fixed block. When the inner side of the clamping plate is in full contact with the side surface of the fixed block, the side edge of the clamping plate can press the clamping block back into the placement hole. At this time, the fixed block can rebound into the first sliding groove and come into contact for fixation. Clamping plates are installed on both sides of the fixed block. The clamping plate is connected to the first pneumatic cylinder. The first pneumatic cylinder drives the clamping plate to rotate to compress the clamping block. When it is necessary to release the fixation, only the first pneumatic cylinder needs to act to press the clamping block back into the placement hole. Such a design can automatically release the fixation.

[0011] Preferably, a control panel is provided on the top surface of the connection block. A second pneumatic cylinder is provided in the placement groove of the connection block. The second pneumatic cylinder is connected to the bottom surface of the placement groove. A friction plate is provided on the pneumatic shaft of the second pneumatic cylinder. The friction plate is connected to the second pneumatic cylinder. The friction plate is arc-shaped and matches the roller. The second pneumatic cylinder is electrically connected to the control panel. An inclination sensor is provided on the top surface of the connection block. The inclination sensor is electrically connected to the control panel. The control panel installed on the top surface of the connection block controls the second pneumatic cylinder installed at the bottom of the placement groove. The pneumatic end of the second pneumatic cylinder is installed with a friction plate. The friction plate is arc-shaped and corresponds to the roller. The length that the pneumatic cylinder extends out is controlled by the control panel, so that the friction plate contacts the roller to increase the friction force. An inclination sensor is installed on the top surface of the connection block and is electrically connected to the control panel. Whether the caster is in a downhill position is determined by detecting the angle of the caster through the inclination sensor. When it is detected that the caster is located downhill, an electrical signal is transmitted to the control panel, and the control panel controls the telescopic movement of the pneumatic cylinder. The telescopic movement of the pneumatic cylinder can make the friction plate contact the roller, and can provide friction force when going downhill, thereby reducing the speed of the swivel caster. Such a design can reduce the speed of the swivel caster when going downhill.

[0012] Preferably, a plurality of fixing grooves are provided on the roller. The plurality of fixing grooves are circumferentially distributed on the roller. The fixing mechanism includes a pedal and a fixing plate. One end of the fixing plate is rotatably connected to the bottom surface of the placement groove. A clamping plate is provided at the other end of the fixing plate. The clamping plate is connected to the fixing plate. The clamping plate corresponds to the fixing groove. There are two fixing plates, and the two fixing plates are symmetrically installed on both sides of the roller. The pedal is connected to the fixing plate. The existence of the fixing groove is for fixing when the caster is stationary. A fixing plate is provided on the placement groove. One end of the fixing plate is rotatably connected to the connection block. A clamping plate is provided at the other end of the fixing plate. The clamping plate matches the fixing groove. When the fixing plate drops, the clamping plate falls into the fixing groove. Fixing plates are installed on both sides of the roller, and the roller can be fixed from both sides. The pedal is connected to the fixing plate to control the lifting of the fixing plate. Such a design can achieve the fixing of the roller when it is stationary.

[0013] Preferably, the pedal is placed at one end of the connecting block. Skateboards are provided on both sides of the pedal. The skateboards are connected to the pedal. A second sliding block is provided on the skateboard. A second sliding groove is provided on the side surface of the connecting block. The pedal is connected to the connecting block through the cooperation of the second sliding block and the second sliding groove. A sliding rod is provided on the skateboard. Both ends of the sliding rod penetrate through the connecting block and are then connected to the skateboard. A guiding groove is provided on the side surface of the fixed plate. The guiding groove penetrates through the fixed plate. The sliding rod is placed in the guiding groove. There are two sliding rods, and the two sliding rods correspond to two fixed blocks respectively. A pulling plate is provided on the side of the pedal away from the connecting block. The pulling plate is connected to the pedal. A clamping groove is provided on one side of the second sliding groove. The clamping groove communicates with the second sliding groove. The shape of the clamping groove corresponds to the shape of the second sliding block. The clamping groove is located at the top of the second sliding groove. The pedal is placed on one side of the connecting block. Skateboards are provided on both sides of the end of the pedal close to the connecting block. The skateboards and the connecting block are slidably connected through the cooperation of the second sliding block and the second sliding groove. Therefore, the pedal can move up and down. A sliding rod is provided on the pedal. The sliding rod penetrates through the connecting block and is then connected to the skateboards on both sides. The sliding rod passes through the guiding groove of the fixed plate. The sliding rod cooperates with the guiding groove. The up and down movement of the sliding rod can drive the fixed plate to rotate, and the fixing and releasing of the roller can be realized. There are two sliding rods, corresponding to two fixed plates respectively, and the simultaneous movement of the two fixed plates can be realized. A clamping groove is provided at the top of the second sliding groove. The clamping groove corresponds to the second sliding block. When fixing is not required, the second sliding block can be pushed into the clamping groove to fix the pedal and the fixed plate. A pulling plate is installed on the outside of the pedal. The existence of the pulling plate facilitates operation. Such a design can ensure the reliability of fixing.

[0014] Preferably, a rotating piece is provided at the bottom of the rotating column. A rotating groove is provided at the top of the connecting block. The rotating column is rotatably connected to the connecting block through the cooperation of the rotating piece and the rotating groove. The rotating column is placed on one side of the roller. The upper end of the rotating column is connected to the base. The rotating piece at the bottom of the rotating column cooperates with the rotating groove on the connecting block to achieve rotational connection, ensuring that the caster can face multiple directions. The position of the rotating column and the roller shaft are not in the same plane, and the two are arranged in a staggered manner. The staggered structure can achieve the effect of easier steering. The top end of the rotating column is connected to the base, which is used to support heavy objects. Such a design can achieve more convenient steering.

[0015] Preferably, a third sliding groove is provided on the side surface of the base, and a support plate is provided on the side surface of the base. The support plate is L-shaped. A third sliding block is provided on the outer side surface of the support plate. The support plate is slidably connected to the base through the cooperation of the third sliding block and the second sliding groove. A rack is provided on one side surface of the support plate. A first motor is provided on the base. The first motor is connected to the base. A first gear is provided on the motor shaft of the first motor. The first gear is connected to the first motor. The first gear meshes with the rack. The support plate is installed on the side surface of the base. The support plate is connected to the third sliding groove on the connecting block through the third sliding block on the back surface. The support plate is L-shaped. The bottom surface of the support plate can provide better support. A rack is provided on the side surface of the support plate. The rack meshes with the first gear installed on the motor shaft of the first motor to realize the lifting of the support plate. When the casters move to a specified position and do not need to be moved, the first motor installed on the base works. The first motor drives the first gear to rotate. Due to the meshing of the first gear and the rack, the lifting of the support plate can be realized. Such a design can realize the overall fixation.

[0016] Preferably, a rotating shaft is provided at the top end of the rotating column. The rotating shaft is connected to the rotating column. Both ends of the rotating shaft are rotatably connected to the base. One end of the rotating shaft penetrates through the base and is located outside the base. A second gear is provided at the end located outside the base. The second gear is connected to the rotating shaft. A second motor is provided on the base. The second motor is connected to the base. A third gear is provided on the motor shaft of the second motor. The third gear meshes with the second gear. A recovery groove is provided on the bottom surface of the base. The recovery groove corresponds to the rotating column. A rotating shaft is provided on the top surface of the rotating column. The rotating shaft is rotatably connected to both sides of the recovery groove of the base. One end of the rotating shaft penetrates through the base and is located outside the base. A second gear is installed on the rotating shaft located outside. A second motor is installed on the base. A third gear is installed on the motor shaft of the second motor. The third gear meshes with the second gear, which can realize the rotation of the second gear. After the support plate drops, when it is supported, the rotating column can be driven to rotate together by the second gear, and the rotating column can be rotated into the recovery groove, and the entire casters can be recovered. By rotating the casters, the casters can be repaired. Similarly, the casters can be protected when not in use.

[0017] The beneficial effects of the present invention are as follows: When the universal caster speed is too fast, it can be automatically braked, better braking, preventing the fixing block from bouncing back, automatically releasing the fixation, reducing the speed of the universal wheel when going downhill, realizing the fixation when the roller is stationary, ensuring the reliability of the fixation, being relatively convenient to turn, realizing the overall fixation, and protecting the casters. Description of the Drawings

[0018] Figure 1 is a structural schematic diagram of the present invention;

[0019] Figure 2 is Figure 1A schematic structural diagram of the middle connecting block;

[0020] Figure 3 is Figure 1 Another schematic structural diagram of the middle connecting block;

[0021] Figure 4 is Figure 1 A schematic structural diagram of the middle roller;

[0022] Figure 5 is Figure 4 A schematic structural diagram of the overspeed fixing component in the middle;

[0023] Figure 6 is Figure 5 The sectional view of;

[0024] Figure 7 is Figure 4 A schematic structural diagram of the middle rebounding mechanism;

[0025] Figure 8 is Figure 1 A schematic structural diagram of the middle fixing mechanism;

[0026] Figure 9 is Figure 8 A schematic structural diagram of the middle fixing plate;

[0027] Figure 10 is Figure 1 A schematic structural diagram of the middle rotating column;

[0028] Figure 11 is Figure 1 A schematic structural diagram of the middle base.

[0029] In the figure: 1. Rotating column; 11. Rotating piece; 12. Rotating shaft; 13. Second gear; 14. Second motor; 15. Third gear; 2. Connecting block; 21. Placing groove; 22. Tooth ring; 23. Rotating groove; 24. Inclination sensor; 25. Second sliding groove; 26. Card slot; 27. Control panel; 28. Second pneumatic cylinder; 29. Friction plate; 3. Roller; 31. Fixing groove; 32. Rotating disk; 33. First sliding groove; 34. Connecting column; 4. Fixing mechanism; 41. Pedal; 42. Slide plate; 43. Second sliding block; 44. Slide bar; 45. Fixing plate; 46. Guiding groove; 47. Pulling plate; 48. Clamping plate; 5. Overspeed fixing component; 51. Fixing block; 52. Engaging teeth; 53. Placing hole; 54. Retaining ring; 55. Block; 56. Baffle; 57. Second spring; 58. First sliding block; 6. Rebounding mechanism; 61. Clamping plate; 62. Bottom edge; 63. Side edge; 64. Rotating shaft; 65. First pneumatic cylinder; 7. Base; 71. Support plate; 72. Third sliding block; 73. First motor; 74. First gear; 75. Recycling groove; 76. Third sliding groove; 77. Rack. Detailed implementation mode

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation modes.

[0031] As Figure 1 In the embodiment, an autonomous braking universal caster structure includes a rotating column 1, a connecting block 2 and a roller 3. A placement groove 21 is provided at the bottom of the connecting block 2. The roller 3 is placed in the placement groove 21. Both ends of the roller 3 are rotatably connected to both sides of the placement groove 21. A fixing mechanism 4 is provided on the roller 3. The fixing mechanism 4 is connected to the roller 3. One end of the roller 3 penetrates through the connecting block 2 and is placed outside the connecting block 2. An overspeed fixing assembly 5 is provided at the end of the roller 3 placed outside the connecting block 2. The overspeed fixing assembly 5 is connected to the roller 3. The upper end of the connecting block 2 is connected to the rotating column 1.

[0032] As Figure 2 、 Figure 4 As shown, the overspeed fixing assembly 5 includes a rotating disk 32, a fixing block 51 and a toothed ring 22. The rotating disk 32 is connected to the end of the roller 3 placed outside the connecting block 2. A plurality of sliding grooves 33 are provided on the rotating disk 32. The plurality of sliding grooves 33 are circumferentially distributed on the rotating disk 32. A sliding block 58 is provided at the bottom of the fixing block 51. The fixing block 51 is connected to the sliding block 58. The fixing block 51 is slidably connected to the rotating disk 32 through the cooperation of the sliding block 58 and the sliding groove 33. One end of the fixing block 51 facing the outside of the rotating disk 32 is provided with a meshing tooth 52. The meshing tooth 52 is connected to the fixing block 51. The toothed ring 22 is placed outside the rotating disk 32 and is connected to the connecting block 2. The meshing tooth 52 corresponds to the toothed ring 22. A connecting column 34 is provided on the rotating disk 32. The connecting column 34 is placed at the center of the rotating disk 32 and is connected to the rotating disk 32. A spring 59 is provided on the fixing block 51. One end of the spring 59 is connected to the fixing block 51, and the other end of the spring 59 is connected to the connecting column 34.

[0033] As Figure 5 、 Figure 6 As shown, a placement hole 53 is provided on the side of the fixing block 51. The placement hole 53 penetrates through both sides of the fixing block 51. Retaining rings 54 are provided at both ends of the placement hole 53. The retaining rings 54 are placed at the ports of the placement hole 53 and are connected to the fixing block 51. Two clamping blocks 55 are provided in the placement hole 53. The cross-sectional shape of the clamping block 55 corresponds to that of the retaining ring 54. A baffle 56 is provided at the end of the clamping block 55 placed in the placement hole 53. The cross-sectional shape of the baffle 56 corresponds to that of the placement hole 53. A spring 57 is provided in the placement hole 53. Both ends of the spring 57 are connected to the baffle 56 of the clamping block 55. The outside of the clamping block 55 is in contact with the side surface of the sliding groove 33 on the rotating disk 32.

[0034] As Figure 7As shown in the figure, several rebound mechanisms 6 are provided on the rotating disk 32. The rebound mechanism 6 includes clamping plates 61 and pneumatic cylinder 1 65. There are two clamping plates 61, and the two clamping plates 61 are placed on both sides of the fixed block 51. The inner sides of the clamping plates 61 are in contact with the fixed block 51. The shape of the clamping plate 61 is L-shaped. The clamping plate 61 includes a bottom edge 62 and a side edge 63. The bottom edge 62 and the side edge 63 are connected. A rotating shaft 64 is provided on the inner side of the bottom edge 62. The rotating shaft 64 is connected to the clamping plate 61, and the rotating shaft 64 is rotatably connected to the rotating disk 32. The inner side of the side edge 63 is in contact with the side surface of the rotating disk 32. The outer side of the clamping plate 61 is connected to the pneumatic shaft of the pneumatic cylinder 1 65. The pneumatic cylinder 1 65 is installed on the rotating disk 32. The several rebound mechanisms 6 correspond to the fixed block 51 one by one.

[0035] As Figure 3 shown, a control panel 27 is provided on the top surface of the connecting block 2. A pneumatic cylinder 2 28 is provided on the placement groove 21 of the connecting block 2. The pneumatic cylinder 2 28 is connected to the bottom surface of the placement groove 21. A friction plate 29 is provided on the pneumatic shaft of the pneumatic cylinder 2 28. The friction plate is connected to the pneumatic cylinder 2 28. The shape of the friction plate 29 is arc-shaped and matches the roller 3. The pneumatic cylinder 2 28 is electrically connected to the control panel 27. An inclination sensor 24 is provided on the top surface of the connecting block 2. The inclination sensor 24 is electrically connected to the control panel 27.

[0036] As Figure 8 、 Figure 9 shown, several fixing grooves 31 are provided on the roller 3. The several fixing grooves 31 are circumferentially distributed on the roller 3. The fixing mechanism 4 includes a pedal 41 and a fixing plate 45. One end of the fixing plate 45 is rotatably connected to the bottom surface of the placement groove 21. A clamping plate 48 is provided at the other end of the fixing plate 45. The clamping plate 48 is connected to the fixing plate 45. The clamping plate 48 corresponds to the fixing groove 31. There are two fixing plates 45, and the two fixing plates 45 are symmetrically installed on both sides of the roller 3. The pedal 41 is connected to the fixing plate 45.

[0037] The pedal 41 is placed at one end of the connecting block 2. Sliding plates 42 are provided on both sides of the pedal 41. The sliding plates 42 are connected to the pedal 41. Sliding blocks two 43 are provided on the sliding plates 42. A sliding groove two 25 is provided on the side surface of the connecting block 2. The pedal 41 is connected to the connecting block 2 through the cooperation of the sliding block two 43 and the sliding groove two 25. A sliding rod 44 is provided on the sliding plate 42. Both ends of the sliding rod 44 penetrate through the connecting block 2 and are connected to the sliding plate 42. A guiding groove 46 is provided on the side surface of the fixing plate 45. The guiding groove 46 penetrates through the fixing plate 45. The sliding rod 44 is placed in the guiding groove 46. There are two sliding rods 44, and the two sliding rods 44 correspond to the two fixed blocks 51 respectively. A pulling plate 47 is provided on the side of the pedal 41 away from the connecting block 2. The pulling plate 47 is connected to the pedal 41. A clamping groove 26 is provided on one side of the sliding groove two 25. The clamping groove 26 is communicated with the sliding groove two 25. The shape of the clamping groove 26 corresponds to the shape of the sliding block two 43. The clamping groove 26 is placed at the top of the sliding groove two 25.

[0038] As shown Figure 10 in the figure, a rotating piece 11 is provided at the bottom of the rotating column 1, a rotating groove 23 is provided at the top of the connecting block 2, and the rotating column 1 is rotationally connected to the connecting block 2 through the cooperation of the rotating piece 11 and the rotating groove 23. The rotating column 1 is placed on one side of the roller 3, and a base 7 is provided at the upper end of the rotating column 1. The upper end of the rotating column 1 is connected to the base 7.

[0039] As shown Figure 11 in the figure, a sliding groove three 76 is provided on the side surface of the base 7, a support plate 71 is provided on the side surface of the base 7, the shape of the support plate 71 is L-shaped, a sliding block three 72 is provided on the outer side surface of the support plate 71, and the support plate 71 is slidably connected to the base 7 through the cooperation of the sliding block three 72 and the sliding groove three 76. A rack 77 is provided on one side surface of the support plate 71, a motor one 73 is provided on the base 7, the motor one 73 is connected to the base 7, a gear one 74 is provided on the motor shaft of the motor one 73, the gear one 74 is connected to the motor one 73, and the gear one 74 meshes with the rack 77.

[0040] A rotating shaft 12 is provided at the top end of the rotating column 1, the rotating shaft 12 is connected to the rotating column 1, both ends of the rotating shaft 12 are rotationally connected to the base 7, one end of the rotating shaft 12 penetrates through the base 7 and is placed outside the base 7, a gear two 13 is provided at the end of the rotating shaft 12 placed outside the base 7, the gear two 13 is connected to the rotating shaft 12, a motor two 14 is provided on the base 7, the motor two 14 is connected to the base 7, a gear three 15 is provided on the motor shaft of the motor two 14, the gear three 15 meshes with the gear two 13, and a recovery groove 75 is provided on the bottom surface of the base 7, and the recovery groove 75 corresponds to the rotating column 1.

[0041] During installation, the connecting block 2 is installed on the base 7 through the rotating column 1. The rotating column 1 is rotationally connected to the connecting block 2 through the cooperation of the rotating piece 11 and the rotating groove 23. The roller 3 is installed in the placement groove 21 of the connecting block 2 and is in rolling connection with the placement groove 21. An overspeed fixing component 5 is installed on one side of the roller 3, and a spring two 57 and a clamping block 55 are installed in the placement hole 53 of the fixing block 51. The fixing block 51 is placed in the sliding groove one 33 of the rotating disc 32, and the sliding block one 58 at the bottom of the fixing block 51 is slidably connected to the sliding groove one 33. One end of the fixing block 51 and the connecting column 34 are connected through a spring one 57. The meshing teeth 52 of the fixing block 51 correspond to the tooth ring 22 installed on the connecting block, and three fixing blocks 51 are circumferentially distributed on the rotating disc 32.

[0042] On both sides of the three fixed blocks 51, a resilience mechanism 6 is installed. A fixing mechanism 4 is installed on the roller 3. The fixing plate 45 is rotatably connected to the bottom of the placement groove 21. The clamping plates 48 on the two fixing plates 45 correspond to the fixing grooves 31 on the roller 3. The pedal 41 is slidably connected to the connecting block 2 through the sliding plate 42. A sliding rod 44 is installed in the middle of the sliding plates 42 on both sides. The sliding rod 44 passes through the guiding groove 46 of the fixing plate 45. The fixing plate 45 can realize the fixation and relaxation of the roller 3 following the lifting and lowering of the pedal 41.

[0043] The base 7 is connected to the rotating shaft 12 of the rotating column 1. A second motor 14 is installed. The third gear 15 on the second motor 14 meshes with the second gear 13 on the rotating shaft 12 to realize the storage of the rotating column 1. The rotating column 1 is stored in the recovery groove 75. A support plate 71 is installed on the base 7. The support plate 71 is slidably connected to the base 7. The support plate 71 is lifted and lowered through the engagement of the rack 77 with the first gear 74 on the first motor 73, and the base 1 can be supported by the support plate 71.

Claims

1. An autonomous braking universal caster structure, characterized in that, It includes a rotating column (1), a connecting block (2) and a roller (3). A placement groove (21) is provided at the bottom of the connecting block (2). The roller (3) is placed in the placement groove (21). Both ends of the roller (3) are rotatably connected to both sides of the placement groove (21). A fixing mechanism (4) is provided on the roller (3). The fixing mechanism (4) is connected to the roller (3). One end of the roller (3) penetrates through the connecting block (2) and is placed outside the connecting block (2). An overspeed fixing assembly (5) is provided at the end of the roller (3) placed outside the connecting block (2). The overspeed fixing assembly (5) is connected to the roller (3). The upper end of the connecting block (2) is connected to the rotating column (1). The overspeed fixing assembly (5) includes a rotating disk (32), a fixing block (51) and a toothed ring (22). The rotating disk (32) is connected to the end of the roller (3) placed outside the connecting block (2). A number of first sliding grooves (33) are provided on the rotating disk (32). The number of first sliding grooves (33) is circumferentially distributed on the rotating disk (32). A first sliding block (58) is provided at the bottom of the fixing block (51). The fixing block (51) is connected to the first sliding block (58). The fixing block (51) is slidably connected to the rotating disk (32) through the cooperation of the first sliding block (58) and the first sliding groove (33). An engaging tooth (52) is provided at the end of the fixing block (51) facing the outside of the rotating disk (32). The engaging tooth (52) is connected to the fixing block (51). The toothed ring (22) is placed outside the rotating disk (32) and is connected to the connecting block (2). The engaging tooth (52) corresponds to the toothed ring (22). A connecting column (34) is provided on the rotating disk (32). The connecting column (34) is placed at the center of the rotating disk (32) and is connected to the rotating disk (32). A first spring (59) is provided on the fixing block (51). One end of the first spring (59) is connected to the fixing block (51). The other end of the first spring (59) is connected to the connecting column (34). A placement hole (53) is provided on the side of the fixing block (51). The placement hole (53) penetrates both sides of the fixing block (51). A retaining ring (54) is provided at both ends of the placement hole (53). The retaining ring (54) is placed at the port of the placement hole (53) and is connected to the fixing block (51). Two clamping blocks (55) are provided in the placement hole (53). The cross-sectional shape of the clamping block (55) corresponds to that of the retaining ring (54). A baffle (56) is provided at the end of the clamping block (55) placed in the placement hole (53). The cross-sectional shape of the baffle (56) corresponds to that of the placement hole (53). A second spring (57) is provided in the placement hole (53). Both ends of the second spring (57) are respectively connected to the baffles (56) of the two clamping blocks (55). The outside of the clamping block (55) is in contact with the side surface of the first sliding groove (33) on the rotating disk (32). A number of rebound mechanisms (6) are provided on the rotating disk (32).The described rebound mechanism (6) includes clamping plates (61) and a first pneumatic cylinder (65). There are two clamping plates (61), and the two clamping plates (61) are placed on both sides of the fixed block (51). The inner sides of the clamping plates (61) are in contact with the fixed block (51). The shape of the clamping plate (61) is L-shaped. The clamping plate (61) includes a bottom side (62) and a side edge (63). The bottom side (62) and the side edge (63) are connected. A rotating shaft (64) is provided inside the bottom side (62). The rotating shaft (64) is connected to the clamping plate (61). The rotating shaft (64) is rotatably connected to the rotating disk (32). The inner side of the side edge (63) is in contact with the side surface of the rotating disk (32). The outer side of the clamping plate (61) is connected to the pneumatic shaft of the first pneumatic cylinder (65). The first pneumatic cylinder (65) is installed on the rotating disk (32). A number of rebound mechanisms (6) correspond to the fixed block (51) one by one.

2. The self - actuating swivel caster structure according to claim 1, characterized in that, The top surface of the described connecting block (2) is provided with a control panel (27). An air cylinder two (28) is provided on the placement groove (21) of the connecting block (2). The air cylinder two (28) is connected to the bottom surface of the placement groove (21). A friction plate (29) is provided on the air cylinder shaft of the air cylinder two (28). The friction plate (29) is connected to the air cylinder two (28). The shape of the friction plate (29) is arc-shaped and matches the roller (3). The air cylinder two (28) is electrically connected to the control panel (27). An inclination sensor (24) is provided on the top surface of the connecting block (2). The inclination sensor (24) is electrically connected to the control panel (27).

3. The structure of a universal caster with autonomous braking according to claim 1, characterized in that, A number of fixing grooves (31) are provided on the described roller (3). The number of fixing grooves (31) is circumferentially distributed on the roller (3). The fixing mechanism (4) includes a pedal (41) and a fixing plate (45). One end of the fixing plate (45) is rotatably connected to the bottom surface of the placement groove (21). A clamping plate (48) is provided at the other end of the fixing plate (45). The clamping plate (48) is connected to the fixing plate (45). The clamping plate (48) corresponds to the fixing groove (31). There are two fixing plates (45), and the two fixing plates (45) are symmetrically installed on both sides of the roller (3). The pedal (41) is connected to the fixing plate (45).

4. The structure of a universal caster with autonomous braking according to claim 3, characterized in that, The pedal (41) is placed at one end of the connecting block (2). Sliding plates (42) are provided on both sides of the pedal (41). The sliding plates (42) are connected to the pedal (41). A sliding block two (43) is provided on the sliding plates (42). A sliding groove two (25) is provided on the side surface of the connecting block (2). The pedal (41) is connected to the connecting block (2) through the cooperation of the sliding block two (43) and the sliding groove two (25). A sliding rod (44) is provided on the sliding plates (42). Both ends of the sliding rod (44) penetrate through the connecting block (2) and are connected to the sliding plates (42). A guiding groove (46) is provided on the side surface of the fixing plate (45). The guiding groove (46) penetrates through the fixing plate (45). The sliding rod (44) is placed in the guiding groove (46). There are two sliding rods (44), and the two sliding rods (44) respectively correspond to two fixing blocks (51). A pulling plate (47) is provided on the side of the pedal (41) away from the connecting block (2). The pulling plate (47) is connected to the pedal (41). A clamping groove (26) is provided on one side of the sliding groove two (25). The clamping groove (26) communicates with the sliding groove two (25). The shape of the clamping groove (26) corresponds to the shape of the sliding block two (43). The clamping groove (26) is placed at the top of the sliding groove two (25).

5. The structure of a universal caster with autonomous braking according to claim 1, characterized in that, The bottom of the rotating column (1) is provided with a rotating piece (11), the top of the connecting block (2) is provided with a rotating groove (23), the rotating column (1) is rotationally connected with the connecting block (2) through the cooperation of the rotating piece (11) and the rotating groove (23), the rotating column (1) is placed on one side of the roller (3), the upper end of the rotating column (1) is provided with a base (7), and the upper end of the rotating column (1) is connected to the base (7).

6. The structure of a swivel caster with autonomous braking according to claim 5, characterized in that, The side surface of the base (7) is provided with a sliding groove three (76), the side surface of the base (7) is provided with a support plate (71), the shape of the support plate (71) is L-shaped, the outer side surface of the support plate (71) is provided with a sliding block three (72), the support plate (71) is slidably connected to the base (7) through the cooperation of the sliding block three (72) and the sliding groove three (76), one side surface of the support plate (71) is provided with a rack (77), a motor one (73) is provided on the base (7), the motor one (73) is connected to the base (7), a gear one (74) is provided on the motor shaft of the motor one (73), the gear one (74) is connected to the motor one (73), and the gear one (74) is engaged with the rack (77).

7. The structure of a self - braking universal caster according to claim 5, characterized in that, The top end of the rotating column (1) is provided with a rotating shaft (12), the rotating shaft (12) is connected to the rotating column (1), both ends of the rotating shaft (12) are rotationally connected to the base (7), one end of the rotating shaft (12) penetrates through the base (7) and is placed outside the base (7), a gear two (13) is provided at the end of the rotating shaft (12) placed outside the base (7), the gear two (13) is connected to the rotating shaft (12), a motor two (14) is provided on the base (7), the motor two (14) is connected to the base (7), a gear three (15) is provided on the motor shaft of the motor two (14), the gear three (15) is engaged with the gear two (13), and a recovery groove (75) is provided on the bottom surface of the base (7), and the recovery groove (75) corresponds to the rotating column (1).

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