CN103009921B - Shock-absorbing caster - Google Patents

Abstract

The invention relates to a damping caster which is characterized in that: the shock absorption device comprises a mounting bracket which can be connected with a car body or a box body, a swing frame which is pivoted with the mounting bracket and is provided with a front support plate and a rear support plate, a wheel shaft which is arranged between the front support plate and the rear support plate of the swing frame, a trundle which is arranged on the wheel shaft, and a shock absorption device which is arranged between the tail part of the swing frame and the mounting bracket. The damping caster has simple structure, can realize the damping function and can greatly improve the service life of the caster.

Description

A shock-absorbing caster

Technical field:

The invention relates to a shock-absorbing caster.

Background technique:

Existing casters generally only include a mounting bracket that can be connected to a car body or a box body, a wheel shaft that is located on the mounting bracket, and a caster wheel that is installed on the wheel shaft. Because the existing casters have no damping device, when the casters pass through the uneven ground, they cannot play a shock-absorbing effect, and the service life of the casters will be greatly shortened.

Invention content:

The object of the present invention is to provide a shock-absorbing caster, which has a simple structure, can realize the shock-absorbing function, and can greatly improve the service life of the caster.

A shock-absorbing caster, characterized in that: it includes a mounting bracket that can be connected with a car body or a box body, a swing frame with a front support plate and a rear support plate pivotally connected to the mounting bracket, and a front support plate and a rear support plate installed on the swing frame. The wheel shaft between the rear support plates, the casters installed on the wheel shaft, and the shock absorbing device between the tail of the swing frame and the mounting bracket, when the casters encounter obstacles, the casters and the front of the swing frame move upward together The sway frame can use the pivot joint between it and the mounting bracket as a fulcrum to make its tail move downwards and act on the shock absorbing device to realize the shock absorbing function.

The shock-absorbing caster of the present invention has a simple structure. When the caster and the front of the swing frame move upward together when the caster hits an obstacle, the swing frame can use the pivot joint between the swing frame and the mounting bracket as a fulcrum to make its tail downward Displace and act on the shock absorbing device to realize the shock absorbing function, and can greatly improve the service life of the casters.

As an improvement of the above scheme, it also includes a shock absorbing device load-bearing capacity adjustment device arranged at the tail of the swing frame. Move left and right along the tail of the swing frame under the action of the adjusting device of the bearing capacity of the shock absorbing device. The lower part of the shock absorber can be moved left and right along the tail of the swing frame through the adjustment device for the bearing capacity of the shock absorber, thereby changing the distance between the lower part of the shock absorber and the pivot joint between the swing frame and the mounting bracket, Thereby adjust the size of the bearing capacity of the shock absorber.

As a further improvement of the above solution, the adjusting device for the bearing capacity of the shock absorbing device includes an adjusting screw rod and a nut slider; the rear part of the swing frame is respectively provided with horizontally arranged adjusting chute on its front support plate and rear support plate , the first connecting rod is arranged between the two adjusting chute, the bottom of the shock absorbing device is connected with the first connecting rod; the tail of the swing frame is also provided with a left connecting plate, The right connecting plate, the adjusting screw is arranged between the left connecting plate and the right connecting plate and is located below the adjusting chute, the lower part of the nut slider cooperates with the adjusting screw, and the upper part is sleeved outside the first connecting rod , rotating the adjusting screw, the nut slider can drive the first connecting rod and the lower part of the shock absorbing device to move left and right along the adjusting chute, thereby changing the distance between the lower part of the shock absorbing device and the pivot joint between the swing frame and the mounting bracket. distance, so as to realize the adjustment of the bearing capacity of the shock absorbing device, the structure is simple, and the adjustment is convenient.

As a further improvement of the above solution, the front support plate and the rear support plate of the swing frame are provided with swing limit slots near the pivot joints with the mounting bracket, and the swing limit slots embedded in the swing limit are provided on the mounting bracket. The limit post in the slot. When the swing frame swings with its pivot joint with the mounting bracket as a fulcrum due to vibration, the limit post can cooperate with the swing limit slot to make the swing frame swing within the length of the swing limit slot, with a simple structure .

As a further improvement of the above solution, the mounting bracket includes a mounting seat and two legs protruding from the mounting seat, and the middle part of the swing frame is pivotally connected to the lower parts of the two legs. Simple structure and convenient assembly.

As a further improvement of the above solution, the mounting bracket also includes a shock absorbing device mounting frame, the shock absorbing device mounting frame is riveted with the upper right side of the two legs, and the upper part of the shock absorbing mounting frame is provided with a second The lower part of the connecting rod is in contact with the front support plate and the end surface of the rear support plate of the swing frame, and the structure is simple.

As a further improvement of the above solution, the shock absorbing device includes a movable frame, a guide rod, a bottom plate, and a first spring. The upper connecting plate of the plate, the upper part of the guide rod passes through the upper connecting plate and is sleeved on the second connecting rod through a connecting piece with lugs, the lower part of the guiding rod is fixedly installed with the bottom plate, and the bottom plate There is a protrusion matched with the longitudinal chute, the first spring is sleeved on the guide rod and its two ends are against the upper connecting plate and the bottom plate respectively, the lower part of the front and rear side plates of the movable frame is in contact with the The first connecting rod is connected, and the movable frame can move downward under the cooperation and guidance of the guide rod and the protrusion of the bottom plate and the longitudinal chute and compress the first spring to realize the damping function, and the structure is simple.

As a further improvement of the above solution, the damping device also includes a second spring sleeved on the guide rod and located inside the first spring, an upper cover and a lower cover sleeved at both ends of the second spring, the upper cover and the lower cover have Under the action of the second spring, it is offset against the upper connecting plate and the bottom plate of the movable frame respectively, wherein the upper connecting plate of the movable frame can drive the upper cover to overcome the active force of the first and second springs and move down along the guide rod, and the structure is simple.

Description of drawings:

Fig. 1 is a perspective view of the present invention:

Circle 2 is another perspective view of the present invention;

Fig. 3 is A--A sectional view of Fig. 1:

Fig. 4 is an exploded view of the structure of the present invention:

Fig. 5 is the structural assembly drawing of the wooden invention after hiding the casters.

Detailed ways:

As shown in Figures 1 to 5, a shock-absorbing caster includes a mounting bracket 1 that can be connected to a vehicle body or a box body, and a swing frame 2 that is pivotally connected to the mounting bracket 1 and has a front support plate 21 and a rear support plate 22 , the wheel shaft 3 installed on the front support plate 21 of the swing frame 2, the rear two support plates 22, the caster 4 installed on the wheel shaft 3, the shock absorber 5 between the tail of the swing frame 2 and the mounting bracket 1, and the The shock-absorbing device bearing capacity adjustment device 6 at the tail of the swing frame 2, the upper part of the shock-absorbing device 5 is connected to the mounting bracket 1, and its lower part is movably connected with the tail of the swing frame 2 and can be adjusted in the load-bearing capacity of the shock absorber Move left and right under the effect of device 6. When the caster 4 runs into an obstacle and the front portion of the caster 4 and the swing frame 2 are displaced upward, the swing frame 2 can use the pivot joint 10 with the mounting bracket 1 as a fulcrum to make its tail move downward and act on The damping device 5 realizes the damping function.

The mounting bracket 1 includes a mounting seat 11, two legs 12 protruding downward from the mounting seat 11, and a shock absorbing device mounting frame 13 riveted to the upper right side of the two legs 12, the middle part of the swing frame 2 and the two legs 12 The lower part is pivotally connected, and the upper part of the shock absorbing device installation frame 13 is provided with a second connecting rod 130 , and its lower part abuts against the upper end surfaces of the front support plate 21 and the rear support plate 22 of the swing frame 2 .

The front support plate 21 and the rear support plate 22 of the swing frame 2 are provided with a swing limit groove 23 near the pivot joint 10 of the installation bracket 1, and the installation bracket 1 is provided with a swing limit groove embedded in the swing limit. The limit column 14 in the groove 23.

The adjusting device 6 of the bearing capacity of the shock absorbing device includes an adjusting screw rod 61 and a nut slide block 62; the rear part of the swing frame 2 is provided with an adjusting chute 24 without a horizontal setting on the front support plate 21 and the rear support plate 22 respectively. The first connecting rod 240 is arranged between the two adjusting chute 24, and the bottom of the shock-absorbing spring 5 is connected with the first connecting rod 240; Left and right connecting plates 25, 26 are respectively provided, and the adjusting screw rod 61 is arranged between the left and right connecting pulleys 25, 26 and is located below the adjusting chute 24, and the bottom of the nut slider 62 cooperates with the adjusting screw rod 61, Its upper part is sleeved on the outside of the first connecting rod 240, rotating the adjusting screw 61, the nut slider 62 can drive the lower part of the first connecting rod 240 and the shock absorbing device 5 to move left and right along the adjusting chute 24, so as to realize shock absorbing and spring loading. 5 The size adjustment of the bearing capacity.

The damping device 5 comprises a movable frame 51, a guide rod 52, a base plate 53, and a first spring 54, and the movable frame 51 includes front and rear side plates respectively provided with longitudinal chute 510 and connecting front and rear side plates The upper connecting plate, the upper part of the guide rod 52 passes through the upper connecting plate and is sleeved on the second connecting rod 130 through a connecting piece 55 with a lug, and the bottom plate 53 is fixedly installed on the lower part of the guiding rod 52 , and the bottom plate 53 is provided with a protrusion that matches the longitudinal chute 510, the first spring 54 is sleeved on the guide rod 52 and its two ends are respectively against the upper connecting plate and the bottom plate 53, and the movable frame 51 The lower parts of the front and rear side plates are connected with the first connecting rod 240, and the movable frame 51 can move downward and be compressed under the guidance of the guide rod 52 and the protrusion of the bottom plate 53 and the longitudinal groove 510. The first spring 54 realizes the damping function.

Of course, the damping device 5 can also include a second spring 56 sleeved on the guide rod 52 and positioned inside the first spring 54, an upper cover 57 and a lower cover 58 sleeved at both ends of the second spring 56, the upper cover 57, Under the action of the second spring 56, the lower cover 58 is respectively offset against the upper connecting plate and the bottom plate 53 of the movable frame 51, wherein the upper connecting plate of the movable frame 51 can drive the upper cover 57 to overcome the effects of the first and second springs 54, 56 The force moves down the guide rod 52 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the implementation scope of the present invention. All equivalent changes and modifications made according to the scope of the patent of the present invention fall within the scope covered by the patent of the present invention.

Claims (6)

1. a shock-absorbing caster wheel, it is characterized in that: comprise the mounting bracket that can be connected with car body or casing, there is front end panel with mounting bracket is articulated, the rocking carrier of rear bearing sheet, be installed on the wheel shaft between rocking carrier front end panel and rear bearing sheet, be installed on the castor on wheel shaft, and be located at the shock absorption device between rocking carrier afterbody and mounting bracket, in the time that castor is together upwards subjected to displacement in the front portion of encountering obstacle and make castor and rocking carrier, rocking carrier can itself and mounting bracket articulated section as fulcrum, make its tail down displacement and act on shock absorption device to realize shock-absorbing function, also comprise the shock absorption device bearing capacity size adjusting device of being located at rocking carrier afterbody, the top of described shock absorption device is connected on mounting bracket, and its underpart is flexibly connected with rocking carrier afterbody and can be along the left and right movement of rocking carrier afterbody under the effect of shock absorption device bearing capacity size adjusting device, described shock absorption device bearing capacity size adjusting device comprises adjusting screw mandrel and nut slider, described rocking carrier afterbody offers respectively the adjusting chute of horizontally set on its front end panel, rear bearing sheet, between two adjusting chutes, is provided with head rod, and the bottom of described shock absorption device is connected with head rod, described rocking carrier afterbody is also respectively equipped with left connecting panel and right connecting panel in the left and right sides of described adjusting chute, described adjusting screw mandrel is located between left connecting panel and right connecting panel and is positioned at and regulates chute below, the bottom of described nut slider coordinates with regulating screw mandrel, its top is sheathed on outside head rod, rotation regulates screw mandrel, can make nut slider drive the bottom of head rod and shock absorption device along regulating chute sway, realize the size adjustment of shock absorption device bearing capacity.

2. a kind of shock-absorbing caster wheel according to claim 1, it is characterized in that: on the front end panel of described rocking carrier and rear bearing sheet, near the articulated section of itself and mounting bracket, offer and wave position-limited trough, described mounting bracket is provided with described in embedding and waves the limited post in position-limited trough.

3. a kind of shock-absorbing caster wheel according to claim 2, is characterized in that: two legs that described mounting bracket comprises mount pad and stretches out downwards in mount pad, the bottom pivot joint of the middle part of rocking carrier and two legs.

4. a kind of shock-absorbing caster wheel according to claim 3, it is characterized in that: described mounting bracket also comprises shock absorption device erecting frame, this shock absorption device erecting frame is riveted mutually with the upper right side of described two legs, and the top of shock absorption device erecting frame is provided with the second pipe link, the front end panel of its underpart and rocking carrier, the upper surface of rear bearing sheet offset.

5. a kind of shock-absorbing caster wheel according to claim 4, it is characterized in that: described shock absorption device comprises tressel, pilot bar, base plate, and first spring, described tressel comprise offer respectively longitudinal chute before, before rear quarter panel and connection, the upper junction plate of rear quarter panel, the top of described pilot bar is passed upper junction plate and is sheathed on described the second pipe link with the attaching parts of lug by one, the bottom of pilot bar is installed with described base plate, and base plate is provided with the projection matching with described longitudinal chute, described the first spring housing is located on pilot bar and its two ends offset with upper junction plate and base plate respectively, before tressel, the bottom of rear quarter panel is connected with described head rod, and tressel can be in the projection of pilot bar and described base plate with longitudinally coordinating under guiding of chute moves down and compresses the first spring and realize shock-absorbing function.

6. a kind of shock-absorbing caster wheel according to claim 5, it is characterized in that: described shock absorption device also comprises the second spring that is enclosed within on pilot bar and be positioned at the first spring inner, the upper cover that is enclosed within the second both ends of the spring and lower cover, upper cover, under cover under the effect of the second spring and offset with upper junction plate and the base plate of tressel respectively, wherein, the application force that the upper junction plate of tressel can drive upper cover to overcome the first spring, the second spring moves down along pilot bar.