Steering lock for trundle

Abstract

The steering lock comprises a trundle frame, a through hole is formed in the middle of the trundle frame, a bearing is arranged in the through hole, a first rotating shaft is rotationally arranged on the axis of the bearing, and a fixing plate capable of being connected with a vehicle body is fixedly arranged at the top of the first rotating shaft. A fixed barrel coaxial with the bearing is fixed at the bottom of the trundle frame, a shaft barrel is transversely communicated with the bottom of the fixed barrel, arc-shaped baffles are arranged at the two ends of the shaft barrel respectively, a second rotating shaft is rotationally arranged on the shaft barrel, and wheels are arranged at the two ends of the second rotating shaft respectively; a braking system and a direction fixing system can be integrated on the trundle, so that the trundle can be fixed at the current position at any time when a vehicle body is used, the situation that the vehicle body slides and accidents happen is avoided, the rotating direction of the trundle can be fixed, and therefore the trundle is fully locked; and workers can operate the vehicle body more conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of casters, and particularly to a steering lock for casters. Background Art

[0002] Casters is a general term, including swivel casters, fixed casters and swivel casters with brakes. Swivel casters, also known as universal wheels, have a structure that allows for 360-degree rotation; fixed casters, also called directional casters, do not have a rotating structure and cannot rotate. Usually, these two types of casters are used in combination.

[0003] For example, in Chinese Patent: Application No. 202123120393.4, Patent Name: A Caster, "including: a connection component; a mounting seat, on which there is a mounting area connected and cooperated with the connection component; a wheel body, rotatably connected to the mounting seat; wherein, the horizontal cross-section of the mounting area is rectangular, and at least two corners at one end of the mounting area are provided with rounded corners". In the above technology, it can rotate freely, so that the vehicle body has better flexibility and can turn and move flexibly on complex terrains. However, there is no braking system in the above technology. When the user needs to fix the vehicle body, the casters cannot be fully locked, and a braking system needs to be additionally installed on the vehicle body, which will increase the cost and the maintenance cost. Summary of the Invention

[0004] The purpose of the present invention is to provide a steering lock for casters.

[0005] To achieve the above purpose, the present invention adopts the following solutions:

[0006] A steering lock for casters, comprising a caster frame, a through hole is provided in the middle of the caster frame, a bearing is provided in the through hole, a first rotating shaft is rotatably provided on the axis of the bearing, a fixing plate that can be connected to the vehicle body is fixedly provided at the top of the first rotating shaft, a fixing cylinder coaxial with the bearing is fixedly provided at the bottom of the caster frame, a shaft cylinder is horizontally communicated at the bottom of the fixing cylinder, arc-shaped baffles are respectively provided at both ends of the shaft cylinder, a second rotating shaft is rotatably provided on the shaft cylinder, and wheels are respectively provided at both ends of the second rotating shaft;

[0007] A brake pad, a first through groove is provided on the outer wall of the arc-shaped baffle, and a brake pad is hinged on the first through groove;

[0008] A direction locking component, an installation cavity is provided on the inner wall of the shaft cylinder, a moving plate that can move along the installation cavity is provided in the installation cavity, a top rod is fixedly provided at the top of the moving plate, and a direction locking component that can lock the current direction of the caster is provided between the top rod and the first rotating shaft;

[0009] The central control component is composed of a first link group, a second link group and a gear spring plate group. Arc-shaped guide grooves are symmetrically arranged on two arc-shaped baffles. A pedal that can move along the arc-shaped guide groove is arranged on the arc-shaped guide groove. A first link group that can connect the brake pad and the wheel to move upward is arranged between the brake pad and the pedal. A second link group that can drive the direction locking component to work is arranged between the pedal and the moving plate. A gear spring plate group that can lock the current position of the second link group is arranged on the outer wall of the fixed cylinder.

[0010] As a further solution of the present invention, the direction locking component includes a circular plate arranged at the top of the ejector rod. A plurality of first teeth are sequentially arranged along the circumference on the top of the circular plate. A plurality of second teeth that can mesh with the first teeth are sequentially arranged along the circumference at the bottom of the first rotating shaft. A first return spring is sleeved on the ejector rod.

[0011] As a further solution of the present invention, a notch that can communicate with the fixed cylinder is arranged on the outer wall of the fixed cylinder. Second through grooves that can penetrate the notch are arranged on both sides of the notch. A connecting block that can extend out of the notch is fixed on the outer wall of the moving plate. Fixed shafts that can extend out of the second through grooves are fixed at both ends of the connecting block. The fixed shafts are connected to the second link group.

[0012] As a further solution of the present invention, the second link group includes a lever hinged on the pedal. Both ends of the fulcrum of the lever are respectively fixed on the arc-shaped baffles. Arc-shaped guide through grooves are arranged on the two arc-shaped baffles. A second rotating shaft is rotatably arranged at one end of the lever. Both ends of the second rotating shaft extend into the arc-shaped guide through grooves. Swing rods are symmetrically hinged on the second rotating shaft. One end of the swing rod is hinged on the fixed shaft.

[0013] As a further solution of the present invention, fixed rods are respectively fixed at one end of the second rotating shaft. One end of the fixed rod is hinged on the brake pad.

[0014] As a further solution of the present invention, the gear spring plate group includes planes arranged on both sides of the notch. Grooves are arranged on the planes. Jacks are arranged in the grooves. Elastic pieces are arranged in the grooves. A plurality of arc-shaped card slots are sequentially arranged on the elastic pieces. One end of the swing rod can cooperate with the arc-shaped card slots on the elastic piece. A guide rod is fixed at one end of the elastic piece. One end of the guide rod extends into the jack. A second return spring is sleeved on the guide rod.

[0015] As a further solution of the present invention, anti-sliding blocks that can contact the wheel are arranged on the inner wall of the brake pad.

[0016] As a further solution of the present invention, a plurality of threaded holes are arranged on the fixing plate.

[0017] In summary, the beneficial effects of the invention compared with the prior art are as follows: The invention can integrate a braking system and a direction fixing system on the casters, so that the vehicle body can be fixed at the current position at any time during use, preventing the vehicle body from slipping and thus avoiding accidents. Moreover, the rotation direction of the casters can be fixed, achieving full locking of the casters and making it more convenient for workers to operate the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of the present invention.

[0019] Figure 2 is an exploded view of the present invention.

[0020] Figure 3 is one of the sectional views of the present invention.

[0021] Figure 4 is another sectional view of the present invention.

[0022] Figure 5 of the present invention Figure 2 is an enlarged view of part A in the present invention.

[0023] Figure 6 is a structural view of the direction locking assembly in the figure of the present invention.

[0024] Description of the reference numerals: 1, caster frame; 2, through hole; 3, bearing; 4, first rotating shaft; 5, fixing plate; 6, fixing cylinder; 7, shaft cylinder; 8, arc-shaped baffle; 9, second rotating shaft; 10, wheel; 11, brake pad; 12, first through groove; 30, direction locking assembly; 13, installation cavity; 14, moving plate; 15, ejector rod; 40, central control assembly; 50, first link group; 60, second link group; 16, arc-shaped guide groove; 17, pedal; 31, circular plate; 32, first tooth; 33, second tooth; 34, first return spring; 35, notch; 36, second through groove; 37, connecting block; 38, fixed shaft; 61, lever; 62, fulcrum; 63, arc-shaped guide through groove; 64, swing rod; 65, fixed rod; 71, plane; 72, groove; 73, jack; 74, elastic sheet; 75, arc-shaped clamping groove; 76, guide rod; 77, second return spring; 81, anti-slip block; 82, threaded hole. DETAILED DESCRIPTION OF THE INVENTION

[0025] The following specific implementation content provides various different embodiments or examples for implementing the invention. Of course, these are only embodiments or examples and are not intended to be restrictive. Additionally, repeated reference numerals may be used in different embodiments, such as repeated numbers and / or letters. These repetitions are for the purpose of simply and clearly describing the invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0026] In addition, spatial-related terms may be used, such as "below", "lower side", "from the inside to the outside", "above", "upper side", and similar terms. These relative terms are used to facilitate the description of the relationship between some elements or features and other elements or features in the attached drawings. These spatial relationship terms include different orientations of the device during use or operation, as well as the orientations described in the attached drawings. The device may be rotated to different orientations or other positions, and the spatial-related adjectives used therein can be interpreted in the same way. Therefore, it should not be construed as a limitation of the invention. The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0027] The invention will be further described below in conjunction with the attached drawing illustration and specific embodiments: As Figures 1 to 6 shown, a steering lock for a caster includes a caster frame 1. A through hole 2 is provided in the middle of the caster frame 1. A bearing 3 is provided in the through hole 2. A first rotating shaft 4 is rotatably provided on the axis of the bearing 3. A fixing plate 5 that can be connected to the vehicle body is fixedly provided at the top of the first rotating shaft 4. A fixing cylinder 6 that can be coaxial with the bearing 3 is fixedly provided at the bottom of the caster frame 1. An axle cylinder 7 is horizontally communicated with the bottom of the fixing cylinder 6. Arc-shaped baffles 8 are respectively provided at both ends of the axle cylinder 7. A second rotating shaft 9 is rotatably provided on the axle cylinder 7. Wheels 10 are respectively provided at both ends of the second rotating shaft 9;

[0028] A brake pad 11. A first through groove 12 is provided on the outer wall of the arc-shaped baffle 8. The brake pad 11 is hinged on the first through groove 12;

[0029] A direction locking assembly 30. An installation cavity 13 is provided on the inner wall of the axle cylinder 7. A moving plate 14 that can move along the installation cavity 13 is provided in the installation cavity 13. A top rod 15 is fixedly provided at the top of the moving plate 14. A direction locking assembly 30 that can lock the current direction of the caster is provided between the top rod 15 and the first rotating shaft 4;

[0030] A central control assembly 40, which is composed of a first link group 50, a second link group 60, and a gear spring plate group 70. Arc-shaped guide grooves 16 are symmetrically provided on two arc-shaped baffles 8. A pedal 17 that can move along the arc-shaped guide groove 16 is provided on the arc-shaped guide groove 16. A first link group 50 that can connect the brake pad 11 and the wheel 10 to move upward is provided between the brake pad 11 and the pedal 17. A second link group 60 that can drive the direction locking assembly 30 to work is provided between the pedal 17 and the moving plate 14. A gear spring plate group 70 that can lock the current position of the second link group 60 is provided on the outer wall of the fixing cylinder 6.

[0031] A further embodiment of the direction locking assembly 30 in the present invention: The direction locking assembly 30 includes a circular plate 31 disposed at the top of the ejector rod 15. A plurality of first teeth 32 are sequentially arranged along the circumference on the top of the circular plate 31. A plurality of second teeth 33 that can mesh with the first teeth 32 are sequentially arranged along the circumference at the bottom of the first rotating shaft 4. A first return spring 34 is sleeved on the ejector rod 15.

[0032] A further embodiment of the fixed cylinder 6 in the present invention: A notch 35 that can communicate with the fixed cylinder 6 is provided on the outer wall of the fixed cylinder 6. Second through grooves 36 that can penetrate the notch 35 are provided on both sides of the notch 35. A connecting block 37 that can extend out of the notch 35 is fixed on the outer wall of the moving plate 14. Fixed shafts 38 that can extend out of the second through grooves 36 are fixed at both ends of the connecting block 37. The fixed shafts 38 are connected to the second link group 60.

[0033] A further embodiment of the second link group 60 in the present invention: The second link group 60 includes a lever 61 hinged on the pedal 17. Both ends of the fulcrum 62 of the lever 61 are respectively fixed on the arc-shaped baffle 8. Arc-shaped guiding through grooves 63 are provided on the two arc-shaped baffles 8. A second rotating shaft 9 is rotatably provided at one end of the lever 61. Both ends of the second rotating shaft 9 extend into the arc-shaped guiding through grooves 63. Swing rods 64 are symmetrically hinged on the second rotating shaft 9. One end of the swing rod 64 is hinged on the fixed shaft 38.

[0034] A further embodiment of the second rotating shaft 9 in the present invention: Fixed rods 65 are respectively fixed at one end of the second rotating shaft 9. One end of the fixed rod 65 is hinged on the brake pad 11.

[0035] A further embodiment of the gear spring plate group 70 in the present invention: The gear spring plate group 70 includes planes 71 provided on both sides of the notch 35. Grooves 72 are provided on the planes 71. Jack holes 73 are provided in the grooves 72. Elastic pieces 74 are provided in the grooves 72. A plurality of arc-shaped card slots 75 are sequentially provided on the elastic pieces 74. One end of the swing rod 64 can cooperate with the arc-shaped card slots 75 on the elastic piece 74. A guide rod 76 is fixed at one end of the elastic piece 74. One end of the guide rod 76 extends into the jack hole 73. A second return spring 77 is sleeved on the guide rod 76.

[0036] A further embodiment of the brake pad 11 in the present invention: Anti-slip blocks 81 that can contact the wheel 10 are provided on the inner wall of the brake pad 11.

[0037] A further embodiment of the fixing plate 5 in the present invention: A plurality of threaded holes 82 are provided on the fixing plate 5.

[0038] During use: When the user needs to park the vehicle body in a fixed position and prevent the vehicle body from rolling backward, only need to step on the pedal 17 to swing the lever 61. The second rotating shaft 9 at one end of the lever 61 will move along the arc-shaped guiding groove 63, and drive the brake pad 11 to fit with the wheel 10 through the fixing rod 65. Through the friction force of the anti-sliding block 81, the effect of fixing the caster is achieved. At this time, one end of the swing rod 64 will move upward and cooperate with the arc-shaped clamping groove 75 of the upper level. Stepping on the pedal 17 again, the lever 61 will swing again, and the ejector rod 15 will move upward to engage the first tooth 32 with the second tooth 33, thereby fixing the first rotating shaft 4 and preventing the first rotating shaft 4 from rotating, thus locking the rotation direction of the caster. At this time, one end of the swing rod 64 will move upward and cooperate with the arc-shaped clamping groove 75 of the upper level. And because the lever 61 swings again, the brake pad 11 will be further pressed against the wheel 10, making it more difficult for the wheel to rotate, realizing the fully locked state of the caster.

[0039] The above shows and describes the basic principles, main features and advantages of the invention. Those skilled in the art should understand that the invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the invention. Without departing from the spirit and scope of the invention, the invention will have various changes and improvements, and these changes and improvements all fall within the scope of the claimed invention. The scope of the invention claimed is defined by the appended claims and their equivalents.

Claims

1. A steering lock for casters, comprising a caster frame (1), a through hole (2) is provided in the middle of the caster frame (1), a bearing (3) is provided in the through hole (2), a first rotating shaft (4) is rotatably provided on the axis of the bearing (3), a fixing plate (5) which can be connected to a vehicle body is fixedly provided on the top of the first rotating shaft (4), a fixing cylinder (6) which can be coaxial with the bearing (3) is fixedly provided at the bottom of the caster frame (1), a shaft cylinder (7) is horizontally connected to the bottom of the fixing cylinder (6), arc-shaped baffles (8) are respectively provided at both ends of the shaft cylinder (7), a second rotating shaft (9) is rotatably provided on the shaft cylinder (7), and wheels (10) are respectively provided at both ends of the second rotating shaft (9), characterized in that ； A brake pad (11), wherein a first through groove (12) is provided on the outer wall of the arc-shaped baffle plate (8), and the brake pad (11) is hingedly connected to the first through groove (12); A direction locking component (30), wherein a mounting cavity (13) is provided on the inner wall of the shaft cylinder (7), a movable plate (14) movable along the mounting cavity (13) is provided in the mounting cavity (13), a top rod (15) is fixed on the top of the movable plate (14), and a direction locking component (30) capable of locking the current direction of the caster is provided between the top rod (15) and the first rotating shaft (4); A central control assembly (40) is composed of a first connecting rod group (50), a second connecting rod group (60) and a gear spring sheet group (70), wherein arc-shaped guide grooves (16) are symmetrically arranged on two arc-shaped baffles (8), a pedal (17) movable along the arc-shaped guide groove (16) is arranged on the arc-shaped guide groove (16), a first connecting rod group (50) connected between the brake pad (11) and the pedal (17) for enabling the brake pad (11) and the wheel (10) to move upward is arranged, a second connecting rod group (60) capable of driving a direction locking assembly (30) to work is arranged between the pedal (17) and the movable plate (14), and a gear spring sheet group (70) capable of locking the current position of the second connecting rod group (60) is arranged on the outer wall of the fixed cylinder (6).

2. A steering lock for casters according to claim 1, characterized in that: The direction locking assembly (30) comprises a circular plate (31) arranged at the top of a push rod (15), a plurality of first teeth (32) are arranged in sequence along the circumference of the top of the circular plate (31), a plurality of second teeth (33) that can mesh with the first teeth (32) are arranged in sequence along the circumference of the bottom of the first rotating shaft (4), and a first return spring (34) is sleeved on the push rod (15).

3. A steering lock for casters according to claim 2, characterized in that: A notch (35) which can communicate with the fixed cylinder (6) is provided on the outer wall of the fixed cylinder (6), and second through slots (36) which can penetrate the notch (35) are provided on both sides of the notch (35). A connecting block (37) which can extend out of the notch (35) is fixed on the outer wall of the movable plate (14), and a fixed shaft (38) which can extend out of the second through slot (36) is fixed at both ends of the connecting block (37), and the fixed shaft (38) is connected to the second connecting rod group (60).

4. A steering lock for casters according to claim 3, characterized in that: The second connecting rod group (60) includes a lever (61) hinged on the pedal (17), the two ends of the fulcrum (62) of the lever (61) are respectively fixed on the arc-shaped baffle plates (8), and arc-shaped guide grooves (63) are provided on the two arc-shaped baffle plates (8). A second rotating shaft (9) is rotatably provided at one end of the lever (61), and the two ends of the second rotating shaft (9) extend into the arc-shaped guide groove (63). A rocker arm (64) is symmetrically hinged on the second rotating shaft (9), and one end of the rocker arm (64) is hinged on the fixed shaft (38).

5. A steering lock for casters according to claim 4, characterized in that: A fixing rod (65) is fixed to one end of each of the second rotating shafts (9), and one end of each of the fixing rods (65) is hinged to the brake pad (11).

6. A steering lock for casters according to claim 5, characterized in that: The gear spring sheet group (70) comprises a plane (71) arranged on both sides of the notch (35), a groove (72) is arranged on the plane (71), a plug hole (73) is arranged in the groove (72), a spring sheet (74) is arranged in the groove (72), a plurality of arc-shaped slots (75) are arranged in sequence on the spring sheet (74), one end of the swing rod (64) can be matched with the arc-shaped slots (75) on the spring sheet (74), a guide rod (76) is fixed on one end of the spring sheet (74), one end of the guide rod (76) is inserted into the plug hole (73), and a second return spring (77) is sleeved on the guide rod (76).

7. A steering lock for casters according to claim 5, characterized in that: An anti-sliding block (81) capable of contacting the wheel (10) is provided on the inner wall of the brake pad (11).

8. A steering lock for casters according to claim 1, characterized in that: A plurality of threaded holes (82) are provided on the fixing plate (5).

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