CN220447576U - Caster wheel - Google Patents

Abstract

The utility model discloses a castor, which comprises a fixed plate, wherein two vertical plates which are spaced in parallel are fixedly connected to the side surface of the fixed plate, a rotating hole and an arc-shaped slotted hole are formed in the lower part of the vertical plates, a first shaft is arranged at the upper part of the vertical plates, two transverse beam plates are arranged between the two vertical plates in parallel at intervals, the transverse beam plates and the vertical plates are connected through rotating shafts, the rotating shafts penetrate through the rotating holes on the transverse beam plates and the vertical plates, a second shaft, a third shaft and a fourth shaft are also arranged on the two transverse beam plates, the second shaft and the third shaft are positioned on the same side of the rotating shafts, the fourth shaft is positioned on the other side of the rotating shaft, the fourth shaft penetrates through the transverse beam plates and the arc-shaped slotted holes on the vertical plates, a first damping mechanism is arranged between the third shaft and the first shaft, the second shaft is positioned on the outer side of the third shaft, and a universal wheel is arranged on the second shaft. The utility model obviously improves the reliability and the service life of the damping of the trundles.

Description

Caster wheel

Technical Field

The utility model particularly relates to a castor, and belongs to the technical field of castor equipment.

Background

The truckle is a common mechanical hardware fitting, and its wide application is in the bottom that bears equipment (such as furniture, shallow, machining equipment, medical hospital bed apparatus) for conveniently bear the removal of equipment, when the truckle passes through some rugged ground, can produce great vibration, not only can influence and bear equipment and use experience, can exert an influence to the life-span of truckle moreover. At present, some casters are generally provided with vibration damping parts to realize the vibration damping function, but the vibration damping effect of the vibration damping mode is poor due to the fact that the springs are compressed and damped directly and the stretching effect of the springs is rarely utilized, and the vibration damping mode is high in requirement on the springs and high in loss on the springs due to the fact that the springs are directly loaded, and meanwhile, when the vibration damping function is not needed after equipment is fixed, the vibration damping function of the casters cannot be disabled, and the application flexibility of the caster is limited to a certain extent.

Disclosure of Invention

Aiming at the problems existing in the prior art, the utility model provides a castor for solving the problems that the prior castor is not ideal in damping effect and does not have a structure for disabling the damping function.

The technical scheme of the utility model is as follows:

the utility model provides a truckle, including the fixed plate, the side fixedly connected with two parallel spaced risers of fixed plate, be provided with rotatory hole and arc slotted hole in the lower part of riser, upper portion at the riser is provided with first axle, parallel interval is provided with two crossbeam boards between two risers, rotate through the rotation axis between crossbeam board and the riser and be connected, the rotation axis passes the rotatory hole on crossbeam board and the riser, still be provided with the second shaft on two crossbeam boards, third axle and fourth axle, second shaft and third axle are located the homonymy of rotation axis, the fourth axle is located the opposite side of rotation axis, the fourth axle passes the arc slotted hole on crossbeam board and the riser, be provided with first damping mechanism between third axle and the first axle, the second axle is located the outside of third axle, be provided with the universal wheel on the second axle.

Further, the upper surfaces of the two vertical plates are fixedly provided with horizontal cover plates, threaded holes are formed in the cover plates, vertical screws are matched to penetrate through the threaded holes, a hand wheel is arranged at the upper end of each screw, the hand wheel can drive the screws to rotate, a top plate is arranged below each screw, and when the screws descend, the top plate can be driven to descend so as to prop against the fourth shaft.

Further, a second vibration reduction mechanism is also arranged between the cover plate and the fourth shaft.

Further, the first vibration reduction mechanism comprises a guide rod arranged on the third shaft and a guide sleeve arranged on the first shaft, the upper end of the guide rod is inserted into the guide sleeve, a first spring is further sleeved outside the guide rod and the guide sleeve, the upper end of the first spring is fixedly connected with the guide sleeve, and the lower end of the first spring is fixedly connected with the guide rod.

Further, the second vibration reduction mechanism comprises a chassis arranged on the fourth shaft, the chassis and the top disc are spaced at a certain distance, a second spring is sleeved on the periphery of the chassis, the top disc and the screw rod, the upper end of the second spring is fixedly connected with the cover plate, and the lower end of the second spring is fixedly connected with the chassis.

The beneficial effects are that: the utility model provides a truckle with damping function, when the road surface is high and low at ordinary times, the crossbeam board can drive the truckle and rotate round the rotation axis to make crossbeam board left and right sides both ends rise or descend, be equipped with first damping mechanism and second damping mechanism respectively at crossbeam board left and right sides both ends simultaneously and play the damping effect, when first spring receives the compression, the second spring receives the extension, or when first spring receives the extension, the second spring receives the compression, thereby obviously improved the reliability and the life of damping; meanwhile, when the hand wheel is rotated to enable the screw rod to descend, the top plate is utilized to extrude the chassis to enable the fourth shaft to reach the lowest end of the arc-shaped slotted hole, at the moment, the beam plate is limited to be not rotated any more, so that the vibration reduction function is disabled, and the application flexibility of the caster is improved.

Drawings

Fig. 1 is a schematic perspective view of a caster.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a cross-sectional view of AA of fig. 2.

The marks in the figure: the novel steering wheel comprises a fixed plate 1, a vertical plate 2, a transverse beam plate 3, a cover plate 4, a screw rod 5, a hand wheel 6, a universal wheel 7, a first spring 8, a second spring 9, a first shaft 21, an arc-shaped slot hole 22, a rotary hole 23, a rotary shaft 31, a second shaft 32, a third shaft 33, a fourth shaft 34, a guide sleeve 211, a guide rod 331 and a chassis 341.

Detailed Description

The technical scheme of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

A castor, as shown in fig. 1-3, comprises a fixed plate 1, which fixed plate 1 is used to fixedly mount the castor on a mobile device to be used, including for example a trolley, a hospital bed, etc. The fixing plate 1 is in the shape of right angle iron, and is provided with a mounting and fixing hole on the plane thereof. Two parallel spaced vertical plates 2 are fixedly connected to the vertical side face of the fixing plate 1, a horizontal cover plate 4 is fixedly arranged on the upper surfaces of the two vertical plates 2, and welding and fixing connection can be adopted between the vertical plates 2 and the fixing plate 1 and between the vertical plates 2 and the cover plate 4. The cover plate 4 is provided with a threaded hole, the threaded hole is matched with a vertical screw rod 5, the upper end of the screw rod 5 is provided with a hand wheel 6, the hand wheel 6 can drive the screw rod 7 to rotate, and a top disc 51 is arranged below the screw rod 5.

The lower parts of the two vertical plates 2 are provided with a rotary hole 23 and an arc-shaped slotted hole 22, wherein the center of the arc-shaped slotted hole and the center of the rotary hole are positioned at the same height, and the circle center of the arc-shaped edge of the arc-shaped slotted hole coincides with the circle center of the rotary hole. A first shaft 21 is provided at the upper portion of the riser 2, the first shaft 21 passing through both risers at the same time. Two beam plates 3 are arranged at a parallel interval on the inner side of the lower part between two vertical plates 2, the beam plates 3 and the vertical plates 2 are rotatably connected through a rotary shaft 31, the rotary shaft 31 penetrates through rotary holes 23 on the beam plates and the vertical plates, a second shaft 32, a third shaft 33 and a fourth shaft 34 are further arranged on the two beam plates 3, wherein the second shaft 32 and the third shaft 33 are positioned on the same side (left side in fig. 1) of the rotary shaft 31, the fourth shaft 34 is positioned on the other side (right side in fig. 1) of the rotary shaft 31, the fourth shaft 34 penetrates through arc-shaped slotted holes 22 on the beam plates and the vertical plates, the beam plates 3 can rotate around the rotary shaft 31, and the rotating angle range is limited by the arc-shaped slotted holes. The second shaft 32 is located outside the third shaft 33, and the universal wheel 7 with the foot brake is fixedly arranged on the second shaft 32. A first damping means is arranged between the third shaft 33 and the first shaft 21 and a second damping means is arranged between the cover plate 4 and the fourth shaft 34.

Specifically, as shown in fig. 3, the first vibration damping mechanism includes a guide rod 331 disposed on the third shaft 33 and a guide sleeve 211 disposed on the first shaft 21, wherein the upper end of the guide rod 331 can be inserted into the guide sleeve 211, a first spring 8 is further sleeved outside the guide rod 331 and the guide sleeve 211, the upper end of the first spring 8 is fixedly welded with the upper end of the guide sleeve 211, and the lower end of the first spring 8 is fixedly welded with the lower end of the guide rod 331. The second vibration reduction mechanism comprises a chassis 341 arranged on the fourth shaft 34, the chassis 341 is positioned below the top disc 51, the chassis 341 and the top disc 51 are spaced at a certain distance, a second spring 9 is sleeved on the peripheries of the chassis 341, the top disc 51 and the screw 5, the upper end of the second spring 9 is fixedly connected with the cover plate 4, and the lower end of the second spring 9 is fixedly connected with the lower portion of the chassis. The first spring 8 and the second spring 9 are separated on both sides of the rotation shaft 31.

In the free state, the universal wheel 7 is grounded, and the beam plate 3 is simultaneously restrained by the first spring 8 and the second spring 9 to be kept horizontal. When the ground is uneven, the universal wheels 7 drive the transverse beam plate 3 to rotate around the rotating shafts 31, so that the left end and the right end of the transverse beam plate 3 are lifted or lowered, at the moment, the first vibration reduction mechanism and the second vibration reduction mechanism simultaneously play a role in vibration reduction, specifically, when the first spring 8 is compressed, the second spring 9 is stretched, or when the first spring 8 is stretched, the second spring 9 is compressed, the stability of the mechanism is improved by the cooperation of the guide rods 331 and the guide sleeves 211, and the reliability and the service life of the caster vibration reduction are obviously improved due to the fact that the compression and the stretching characteristics of the two springs are utilized for vibration reduction; further, when the hand wheel 6 is rotated clockwise to enable the screw 5 to descend, the top plate 51 is driven to descend, the top plate 51 is utilized to extrude the bottom plate 341 to enable the fourth shaft 34 to descend to the lowest end of the arc-shaped slot 22, at the moment, the beam plate 3 is limited and cannot rotate any more, so that the damping function of the castor is disabled, the application flexibility of the castor is improved, and the castor is suitable for occasions where damping is not needed any more.

Claims (5)

1. The utility model provides a truckle, includes fixed plate, its characterized in that: the side fixedly connected with two parallel spaced risers of fixed plate is provided with rotatory hole and arc slotted hole in the lower part of riser, upper portion at the riser is provided with first axle, parallel interval is provided with two crossbeams boards between two risers, rotate through the rotation axis between crossbeams board and the riser and be connected, the rotation axis passes rotatory hole on crossbeams board and the riser, still be provided with the second shaft on two crossbeams boards, third axle and fourth axle, second shaft and third axle are located the same side of rotation axis, the fourth axle is located the opposite side of rotation axis, the fourth axle passes the arc slotted hole on crossbeams board and the riser, be provided with first damping mechanism between third axle and the first axle, the second shaft is located the outside of third axle, be provided with the universal wheel on the second shaft.

2. A castor as claimed in claim 1, wherein: the upper surfaces of the two vertical plates are also fixedly provided with a horizontal cover plate, threaded holes are formed in the cover plate, vertical screws are matched to penetrate through the threaded holes, a hand wheel is arranged at the upper end of each screw, the hand wheel can drive the screws to rotate, a top plate is arranged below each screw, and when the screws descend, the top plate can be driven to descend so as to prop against the fourth shaft.

3. A castor as claimed in claim 2, wherein: a second vibration reduction mechanism is also arranged between the cover plate and the fourth shaft.

4. A castor as claimed in claim 1, wherein: the first vibration reduction mechanism comprises a guide rod arranged on a third shaft and a guide sleeve arranged on a first shaft, wherein the upper end of the guide rod is inserted into the guide sleeve, a first spring is sleeved outside the guide rod and the guide sleeve, the upper end of the first spring is fixedly connected with the guide sleeve, and the lower end of the first spring is fixedly connected with the guide rod.

5. A castor according to claim 3, wherein: the second vibration reduction mechanism comprises a chassis arranged on the fourth shaft, the chassis and the top disc are spaced at a certain distance, a second spring is sleeved on the periphery of the chassis, the top disc and the screw rod, the upper end of the second spring is fixedly connected with the cover plate, and the lower end of the second spring is fixedly connected with the chassis.