Trundle with adjustable height

Abstract

The utility model belongs to the field of casters, and particularly relates to a height-adjustable caster which comprises a connecting plate, and a support is arranged at the top of the connecting plate. A bracket is mounted at the bottom of the connecting plate; guide rails are symmetrically and fixedly connected to the middle of the support. A pulley is arranged in the bracket; the middle part of the pulley is rotationally connected with a sliding block; the sliding block is in sliding connection with the guide rail; a pair of barrels is arranged in the middle of the guide rail; the middle part of the barrel is rotationally connected with a handle; a cam part and a parallel part are arranged on the surface of the handle; a fixed plate is fixedly connected to the inner side wall of the barrel; the handle is rotated to enable the top plate to drive the pressing plate to slide, rapid locking and unlocking of the pulley and the sliding block by the device are achieved, the height of the pulley can be adjusted along with the sliding block after the pulley is unlocked, the convenience of adjusting the height of the pulley by the device is improved, and operation during height adjustment of the pulley is simplified.

Description

Technical Field

[0001] The utility model relates to the field of casters, in particular to a height-adjustable caster. Background Art

[0002] A caster is a small wheel mounted on the bottom of equipment, machinery, or furniture to improve mobility, flexibility, and load-bearing capacity. A caster typically consists of a wheel, a bracket, and a connector. The wheel is responsible for rolling, the bracket provides support and connection, and the connector ensures the caster is securely attached to the desired equipment.

[0003] Although some existing casters have a height adjustment function, it has been found in use and observation that their adjustment method is generally to remove bolts for adjustment. This adjustment method requires removing many bolts, resulting in a more complicated adjustment operation.

[0004] Therefore, a height-adjustable caster is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: the height-adjustable caster described in the present invention comprises a connecting plate, a support is provided on the top of the connecting plate; a bracket is installed at the bottom of the connecting plate; a guide rail is symmetrically fixed to the middle of the bracket; a pulley is provided inside the bracket; a slider is rotatably connected to the middle of the pulley; the slider and the guide rail are slidably connected; a pair of cylinders are provided in the middle of the guide rail; a handle is rotatably connected to the middle of the cylinder; a cam portion and a parallel portion are provided on the surface of the handle; a fixing plate is fixed to the inner side wall of the cylinder; the fixing plate A sliding rod is provided through the middle of the fixed plate and is slidably connected to it; a pressure plate is fixedly connected to the end of the sliding rod; the pressure plate and the fixed plate are connected by a spring; the spring is sleeved on the surface of the sliding rod; the other end of the sliding rod is fixedly connected to a top plate; the top plate is located between the fixed plate and the handle; the pressure plate is located between the fixed plate and the slider; the handle is turned so that the top plate drives the pressure plate to slide, thereby realizing rapid locking and unlocking of the pulley and the slider by the device, so that the pulley can be adjusted in height along with the slider after being unlocked, thereby improving the convenience of the device in adjusting the pulley height and simplifying the operation when adjusting the pulley height.

[0007] Preferably, a plurality of fixing holes are symmetrically provided on the surface of the guide rail; the cylinder and the fixing holes are threadedly connected; by providing the fixing holes, the device can quickly adjust the position of the cylinder, expand the adjustment range of the pulley height, and enhance the practicality of the pulley when in use.

[0008] Preferably, a first magnet is fixed to the end of the handle; a plurality of second magnets are fixed to the surface of the guide rail; the first magnet and the second magnet are arranged correspondingly; when the staff adjusts the height of the pulley, the handle will rotate and the parallel portion will be at the bottom of the cam portion. At this time, the first magnet will approach the second magnet as the handle rotates, and the first magnet will be fixed to the surface of the guide rail under the attraction of the second magnet, thereby reducing the workload required to fix the handle when adjusting the pulley and improving the convenience of fixing the handle when unlocking.

[0009] Preferably, a protective pad is fixed to the middle of the pressure plate; a plurality of grooves are provided on the surface of the protective pad; the protective pad is located between the pressure plate and the slider; when the pressure plate and the slider come into contact, the protective pad will also come into contact with the slider. Because the surface of the protective pad is made of flexible material, the pressure on the surface of the slider will be dispersed when the slider is squeezed by the pressure plate, reducing the damage to the slider surface caused by squeezing. At the same time, because a plurality of grooves are provided on the surface of the protective pad, the contact area between the protective pad and the slider is larger, the contact area between the pressure plate and the slider is increased, and the friction fixing effect between the pressure plate and the slider is increased.

[0010] Preferably, a damping spring is fixed to the top of the connecting plate; the damping spring is installed at the bottom of the support; when the device is installed at the bottom of the equipment through the support, the pulley will transport the equipment, and the pulley will be bumpy due to the ground conditions during movement. At this time, the damping spring will absorb the impact caused by the bumps and transmit the attenuated impact to the equipment through the support, thereby reducing the impact on the equipment when it moves.

[0011] Preferably, a plurality of bristles are fixedly connected to the inner side wall of the bracket; the bristles are located on the top of the pulley; when the pulley moves, the surface will be stained with dust or dirt on the ground, and the bristles will remove impurities on the surface of the pulley, thereby realizing self-cleaning of the pulley by the device, improving the smoothness and neatness of the pulley surface, and making the pulley move more smoothly.

[0012] The utility model is beneficial in that:

[0013] 1. The utility model describes an adjustable height caster. By turning the handle, the top plate drives the pressure plate to slide, thereby realizing the rapid locking and unlocking of the pulley and the slider by the device. After the pulley is unlocked, the height can be adjusted along with the slider, thereby improving the convenience of the device for adjusting the pulley height and simplifying the operation when adjusting the pulley height.

[0014] 2. The height-adjustable caster described in the present invention is provided with a fixing hole so that the device can quickly adjust the position of the cylinder, expand the adjustment range of the pulley height, and enhance the practicality of the pulley when used. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the main body of the utility model;

[0017] Figure 2 This is a structural diagram of the slider in the utility model;

[0018] Figure 3 This is a schematic structural diagram of the guide rail in the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the handle in the utility model;

[0020] Figure 5 It is a structural diagram of the protective pad in the utility model.

[0021] In the figure: 1. Connecting plate; 12. Support; 13. Bracket; 14. Guide rail; 15. Pulley; 16. Slider; 17. Cylinder; 18. Handle; 19. Fixing plate; 110. Sliding rod; 111. Pressing plate; 112. Top plate; 2. Fixing hole; 3. First magnet; 32. Second magnet; 4. Protective pad; 42. Groove; 5. Damping spring; 6. Bristles. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Specific examples are given below.

[0024] See also Figures 1 to 5As shown, an adjustable height caster according to an embodiment of the present invention comprises a connecting plate 1, a support 12 is provided on the top of the connecting plate 1; a bracket 13 is installed at the bottom of the connecting plate 1; a guide rail 14 is symmetrically fixed to the middle of the bracket 13; a pulley 15 is provided inside the bracket 13; a slider 16 is rotatably connected to the middle of the pulley 15; the slider 16 and the guide rail 14 are slidably connected; a pair of cylinders 17 are provided in the middle of the guide rail 14; a handle 18 is rotatably connected to the middle of the cylinder 17; a cam portion and a parallel portion are provided on the surface of the handle 18; the inner side of the cylinder 17 The wall is fixed with a fixed plate 19; a sliding rod 110 is provided through the middle of the fixed plate 19 and is slidably connected; a pressure plate 111 is fixed to the end of the sliding rod 110; the pressure plate 111 and the fixed plate 19 are connected by a spring; the spring is sleeved on the surface of the sliding rod 110; the other end of the sliding rod 110 is fixed with a top plate 112; the top plate 112 is located between the fixed plate 19 and the handle 18; the pressure plate 111 is located between the fixed plate 19 and the slider 16; when the pulley 15 is working normally, the cam portion of the handle 18 will be located at the bottom of the parallel portion and come into contact with the top plate 112 and press it. The top plate 112 will make the slide bar 110 slide along the fixed plate 19 with the pressure plate 111 as shown in the protective pad 4. The spring will be in a stretched state. The pressure plate 111 will squeeze and fix the surface of the slider 16 under the squeezing action of the handle 18, so that the pulley 15 and the slider 16 will be in a stable state. When the height of the pulley 15 needs to be adjusted, the staff can rotate the handle 18 so that the parallel part of the handle 18 is located at the bottom of the cam part. At this time, the top plate 112 will be separated from the squeezing of the cam part, and the pressure plate 111 will also be reset along with the slide bar 110 under the action of the spring. The slider 16 and the pressure plate 111 are out of contact and in an active state. Sliding the slider 16 adjusts the height of the pulley 15. After the adjustment is completed, the handle 18 can be turned again to fix the slider 16 with the pressure plate 111, thereby realizing rapid height adjustment of the pulley 15 by the device; turning the handle 18 causes the top plate 112 to drive the pressure plate 111 to slide, thereby realizing rapid locking and unlocking of the pulley 15 and the slider 16 by the device, so that the pulley 15 can be adjusted in height along with the slider 16 after being unlocked, thereby improving the convenience of the device in adjusting the height of the pulley 15 and simplifying the operation when adjusting the height of the pulley 15.

[0025] See also Figure 3As shown, the guide rail 14 is symmetrically provided with a plurality of fixing holes 2; the cylinder 17 and the fixing holes 2 are threadedly connected; when the pulley 15 needs a greater degree of height adjustment, such as when it needs to be hidden inside the bracket 13 or in other situations, the staff can rotate the cylinder 17 so that the cylinder 17 is disengaged from the current fixing hole 2, and then it can be installed inside the corresponding fixing hole 2, so that the device can quickly adjust the position of the cylinder 17 and expand the height adjustment range of the pulley 15 by the device; by setting the fixing holes 2, the device can quickly adjust the position of the cylinder 17, expand the adjustment range of the pulley 15 height, and enhance the practicality of the pulley 15 when in use.

[0026] See also Figure 3 and Figure 4 As shown, the end of the handle 18 is fixed with a first magnet 3; the surface of the guide rail 14 is fixed with multiple second magnets 32; the first magnet 3 and the second magnet 32 ​​are correspondingly arranged; when the staff adjusts the height of the pulley 15, the handle 18 will rotate and make the parallel portion at the bottom of the cam portion. At this time, the first magnet 3 will approach the second magnet 32 ​​as the handle 18 rotates, and the first magnet 3 will be fixed to the surface of the guide rail 14 under the attraction of the second magnet 32, reducing the workload required to fix the handle 18 when the pulley 15 is adjusted, and improving the convenience of fixing the handle 18 when unlocking.

[0027] See also Figure 5 As shown, a protective pad 4 is fixed to the middle of the pressure plate 111; a plurality of grooves 42 are provided on the surface of the protective pad 4; the protective pad 4 is located between the pressure plate 111 and the slider 16; when the pressure plate 111 and the slider 16 come into contact, the protective pad 4 will also come into contact with the slider 16. Because the surface of the protective pad 4 is made of flexible material, the surface pressure of the slider 16 will be dispersed when the slider 16 is squeezed by the pressure plate 111, reducing the damage to the surface of the slider 16 caused by squeezing. At the same time, because a plurality of grooves 42 are provided on the surface of the protective pad 4, the contact area between the protective pad 4 and the slider 16 is larger, the contact area between the pressure plate 111 and the slider 16 is increased, and the friction fixing effect between the pressure plate 111 and the slider 16 is increased.

[0028] See also Figure 1 As shown, a damping spring 5 is fixed to the top of the connecting plate 1; the damping spring 5 is installed at the bottom of the support 12; when the device is installed at the bottom of the equipment through the support 12, the pulley 15 will transport the equipment. When moving, the pulley 15 will be bumpy due to the ground conditions. At this time, the damping spring 5 will absorb the impact caused by the bumps and transmit the attenuated impact to the equipment through the support 12, thereby reducing the impact on the equipment when it moves.

[0029] See also Figure 1As shown, a plurality of bristles 6 are fixedly connected to the inner wall of the bracket 13; the bristles 6 are located on the top of the pulley 15; when the pulley 15 moves, the surface will be stained with dust or dirt on the ground, and the bristles 6 will remove impurities on the surface of the pulley 15, thereby realizing the self-cleaning of the pulley 15 by the device, improving the smoothness and neatness of the surface of the pulley 15, and making the pulley 15 more stable when moving.

[0030] See also Figure 4 As shown, the surface of the top plate 112 is an arc-shaped transition. Because the surface of the top plate 112 is an arc-shaped transition, the handle 18 encounters less resistance when squeezing the top plate 112, thereby reducing the wear between the handle 18 and the top plate 112 caused by friction.

[0031] Working principle: When the pulley 15 is working normally, the cam portion of the handle 18 will be located at the bottom of the parallel portion and will come into contact with and squeeze the top plate 112, that is, as shown in the protective pad 4, the top plate 112 will make the slide bar 110 slide along the fixed plate 19 with the pressure plate 111, and the spring will be in a stretched state. The pressure plate 111 will squeeze and fix the surface of the slider 16 under the squeezing action of the handle 18, so that the pulley 15 and the slider 16 will be in a stable state. When the height of the pulley 15 needs to be adjusted, the staff can rotate the handle 18 so that the parallel portion of the handle 18 is located at the bottom of the cam portion. At this time, the top plate 112 will be separated from the squeezing of the cam portion, and the pressure plate 111 will also be Under the action of the spring, as the slide rod 110 is reset, the slider 16 and the pressure plate 111 are disengaged and in an active state, the slider 16 is slid to adjust the height of the pulley 15. After the adjustment is completed, the handle 18 can be turned again to fix the pressure plate 111 to the slider 16, so that the device can quickly adjust the height of the pulley 15. When the pulley 15 needs to be adjusted to a greater extent, such as when it needs to be hidden inside the bracket 13 or in other situations, the staff can rotate the cylinder 17 to disengage the cylinder 17 from the current fixing hole 2, and then install it inside the corresponding fixing hole 2, so that the device can quickly adjust the position of the cylinder 17, expanding the device's control over the pulley 15. 5 height adjustment range; when the staff adjusts the height of the pulley 15, the handle 18 will rotate and the parallel portion will be at the bottom of the cam portion. At this time, the first magnet 3 will approach the second magnet 32 ​​as the handle 18 rotates. The first magnet 3 will be fixed to the surface of the guide rail 14 under the attraction of the second magnet 32, reducing the workload required to fix the handle 18 when adjusting the pulley 15; when the pressure plate 111 and the slider 16 come into contact, the protection pad 4 will also come into contact with the slider 16. Because the surface of the protection pad 4 is made of flexible material, the pressure on the surface of the slider 16 when being squeezed by the pressure plate 111 will be dispersed, reducing the damage to the surface of the slider 16 caused by squeezing. A plurality of grooves 42 are provided on the surface of the protective pad 4, so that the contact area between the protective pad 4 and the slider 16 is larger, and the contact area between the pressure plate 111 and the slider 16 is increased; when the device is installed at the bottom of the equipment through the support 12, the pulley 15 will transport the equipment, and the pulley 15 will be bumpy due to the ground conditions during movement. At this time, the damping spring 5 will absorb the impact caused by the bumps and transmit the attenuated impact to the equipment through the support 12; when the pulley 15 moves, the surface will be stained with dust or dirt on the ground, and the bristles 6 will remove impurities on the surface of the pulley 15, thereby realizing self-cleaning of the pulley 15 by the device and improving the smoothness and neatness of the surface of the pulley 15.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A height-adjustable caster comprising a connecting plate (1), characterized in that: The top of the connecting plate (1) is provided with a support (12); the bottom of the connecting plate (1) is installed with a bracket (13); the middle of the bracket (13) is symmetrically fixed with a guide rail (14); a pulley (15) is provided inside the bracket (13); the middle of the pulley (15) is rotatably connected to a slider (16); the slider (16) and the guide rail (14) are slidably connected; a pair of cylinders (17) are provided in the middle of the guide rail (14); the middle of the cylinder (17) is rotatably connected to a handle (18); the surface of the handle (18) is provided with a cam portion and a parallel portion; a fixed plate (19) is fixedly connected to the inner side wall of the cylinder (17); a sliding rod (110) is provided through the middle of the fixed plate (19) and is slidably connected; a pressing plate (111) is fixedly connected to the end of the sliding rod (110); the pressing plate (111) and the fixed plate (19) are connected by a spring; the other end of the sliding rod (110) is fixedly connected to a top plate (112); the top plate (112) is located between the fixed plate (19) and the handle (18); the pressing plate (111) is located between the fixed plate (19) and the slider (16).

2. The height-adjustable caster according to claim 1, characterized in that: The surface of the guide rail (14) is symmetrically provided with a plurality of fixing holes (2); the cylinder (17) and the fixing holes (2) are threadedly connected.

3. The height-adjustable caster according to claim 2, characterized in that: The end of the handle (18) is fixedly connected to a first magnet (3); the surface of the guide rail (14) is fixedly connected to a plurality of second magnets (32); the first magnet (3) and the second magnet (32) are correspondingly arranged.

4. The height-adjustable caster according to claim 3, characterized in that: A protection pad (4) is fixedly connected to the middle of the pressure plate (111); a plurality of grooves (42) are provided on the surface of the protection pad (4); and the protection pad (4) is located between the pressure plate (111) and the slider (16).

5. The height-adjustable caster according to claim 4, characterized in that: A damping spring (5) is fixed to the top of the connecting plate (1); the damping spring (5) is installed at the bottom of the support (12).

6. The height-adjustable caster according to claim 5, characterized in that: A plurality of bristles (6) are fixedly connected to the inner side wall of the bracket (13); the bristles (6) are located on the top of the pulley (15).

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