JP2016088418A - Buffer caster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a conventional structure requires a large number of components, cannot show the optimum vibration relaxation, and cannot achieve precise suppression means of vibration, against component damage or abnormal sound production caused by impact force generated when traveling along an irregular traveling road surface at faster speed than walking.SOLUTION: In a buffer caster 101, axle support and revolution support are constituted integrally, in which the axle support is carried out through a buffer 3 interposed between an axle 2 and a revolving frame 5, and the revolution support is carried out through a revolving slide plate 6 interposed between the revolving frame 5 and a stationary frame 7.SELECTED DRAWING: Figure 2

Description

In the present invention, the axle is supported via a shock absorber between the axle and the turning frame, and the turning support is provided via the turning sliding plate between the fixed frame and the turning frame, so that a simple configuration is transmitted from the wheel shaft. The present invention relates to a shock-absorbing caster that suppresses impact force and reduces component breakage and abnormal noise generation.

The structure and operation revealed from the patent publication publicity of “Patent Document 1” is that the fork 1 is divided into an upper fork 1A and a lower fork 1B, and the ends of the upper fork 1A and the lower fork 1B are movably supported by a shaft support 7. The axle 3 is fixed at the tip of the lower fork 1B, the spring 11 and the ball bearing 8 and the stopper piece 14 are provided at the turning center of the upper fork 1A, and many other components such as the spring receiver 9 and the turning bearing. It has become a complicated configuration. In this operation, the vertical load transmitted from the top plate 10 is borne by the wheel shafts 2 and 3 and the shaft support 7, and the distance between the fulcrums is short on the shaft support 7, so that a larger load than the wheel shafts 2 and 3 is borne. The vibration from the wheel shaft 3 is transmitted to the spring 11 and the shaft support 7 during traveling, and the displacement is absorbed by the spring 11, and the top plate 10 is connected to the upper fork 1A and the lower fork 1B by the shaft support 7, It is considered that the vertical vibration from the axle is directly transmitted to the top plate 10. In the present invention, since the spring 11 is arranged in the vertical direction at the bottom of the top plate 10, the supporting parts are indispensable, the height cannot be lowered, and the accurate vertical axle vibration cannot be insulated. There was a problem that no consideration was given to the longitudinal vibration and the lateral vibration.

The structure and operation revealed from the patent publication publicity of “Patent Document 2” is that the fork 1 is divided into an upper fork 1a and a lower fork 1b, and a conical coil spring is provided on the side surface of the substantially central portion of the upper fork 1a and the end of the lower fork 1b. 9 is disposed and is supported by the shafts 4 and 6 so as to be movable using the supports 18 and 19. The upper fork 1a and the lower fork 1b are connected to each other by a stepped pin 11 at shaft support holes 5 and 7, and the axle 3 is fixed to the lower end of the upper fork 1a. A pedestal 1 is attached to the upper center of the upper fork 1a via a swivel bearing 3. Since the conical coil spring 9 is installed sideways, its supporting parts are indispensable. In this operation, the vertical load transmitted from the pedestal 2 is borne by the wheel shafts 12 and 13 and the shaft support 7, and the load of the pedestal 2 acts on the shaft support 7 and the wheels 12, the axle 13 and the conical coil spring 9. It is thought that the moment with the part is balanced. The vertical vibration at the time of traveling is transmitted from the wheel 12 and the axle 13 to the conical coil spring 9 and the shaft support 7 part, and the displacement is absorbed by the conical coil spring 9, and the vibration of the axle 13 directly passes through the shaft support 7 part. It is thought that it is configured to be transmitted to. In the present invention, since the conical coil spring 9 is installed sideways, the number of parts is large, there are many shaft support holes accompanying the number of parts, there is a concern about the occurrence of part sliding and abnormal noise, and vertical axle vibration. However, there has been a problem that it has not been able to cut off properly, and at the same time, no consideration has been given to longitudinal vibration and lateral vibration.

The configuration and action that is revealed from the patent publication publicity of “Patent Document 3” is that 90 parts of the pivoting shaft member are attached to one end of the arm member 1 and the arm member 2 via the buffer member 5 between the arm member 1 and the support member 2. In this structure, the wheel 8 axle is attached to and supported by the pivot axis L8 at the distal end of the arm member 1. In this operation, the vertical load transmitted from the support member 2 is applied to the wheel 8, the axle, and the shock absorbing member 5 through 90 parts of the pivot shaft member. It is considered that the structure is a load that is several times larger than The vertical vibration at the time of traveling is transmitted through the path of the wheel 8 → the axle → the arm member 1 → the pivot shaft member 90 and the buffer member 5 → the support member 2 and the vertical displacement at the time of traveling on the uneven road surface is the deflection of the buffer member 5. It is considered that the axle vibration is directly transmitted to the support member 2, and the shock absorbing member 5 is subjected to a large load more than the axial weight, and the vertical vibration is not accurately mitigated. There was a problem that said.

JP 7-329505 A JP 2005-88846 A JP 2014-1000096 A

The problem to be solved is that, with shock absorbers, the conventional structure has a large number of parts and optimal vibration against the occurrence of parts damage and abnormal noise due to impact force when traveling on uneven road surfaces at a speed faster than walking. Relaxation cannot be exhibited, and effective vibration suppressing means cannot be realized.

The shock-absorbing caster according to the present invention is a simple means capable of appropriately suppressing vibration by supporting the axle through a buffer body between the axle and the frame as a means for suppressing vertical vibration when traveling on an uneven road surface at a speed faster than walking. The configuration was Further, as a means for suppressing horizontal vibration during turning, a simple structure is adopted in which turning is held between a turning frame and a fixed frame via a turning sliding plate to suppress lateral vibration or meandering.

The shock absorber of the present invention supports the axle via a shock absorber between the axle and the turning frame, and supports the turning via a turning sliding plate between the turning frame and the fixed frame. A caster that is fixed to a movable body and travels on a traveling road surface, and is formed by bending an axle on which wheels are rotated to hold both ends, a turning hole seat having a turning hole, and a right and left of the turning hole seat. A swivel frame of a concave plate-like body having a curved arm, the swivel frame having a cylindrical shock absorber fitting seat on the arm, and the shock absorber fitting seat of the swivel frame A shock absorber having an axle fitting portion through which the axle passes, a shaft end screw for fixing an axle end surface to the shock absorber, a square plate, and a center of the square plate. The provided cylindrical turning guide and the four corners of the rectangular plate A fixed frame provided with a moving body mounting hole, wherein the cylindrical turning guide is fitted into a turning hole of the turning frame, and a turning sliding plate fitted into the cylindrical turning guide, The swivel sliding plate located between the swivel frame and the fixed frame is integrally formed.

The shock-absorbing caster of the present invention is a caster that supports the axle via a shock absorber between the axle and the frame, travels on the traveling road surface with the movable body fixed seating surface of the frame fixed to the movable body, and has wheels. Rotating axles that are held at both ends, a movable body fixed seat surface, and arms formed by bending the left and right sides of the movable body fixed seat surface provided with movable body mounting holes at four corners of the movable body fixed seat surface, respectively. A frame of a concave plate-shaped body having a cylindrical buffer body fitting seat on the arm, and a buffer body fitted to the buffer body fitting seat of the frame. And the shock absorber having an axle hole through which the axle passes and a shaft end screw for fixing the axle end face to the shock absorber.

The shock-absorbing caster of the present invention is a twin-wheel caster that travels on the traveling road surface by supporting the axle between the axle and the frame via the shock-absorbing body, and fixing the movable-body fixed seat surface of the frame to the movable body. The wheel is held on both the left and right sides of the movable body fixed seat surface provided with the movable body fixed seat surface and the movable body fixed seat surface provided with the movable body mounting holes at the four corners. A frame of a concave plate-like body having the arm formed by bending inside the frame, the frame having a cylindrical buffer body fitting seat on the arm, and the buffer body fitting of the frame The shock absorber that fits into the seat, the shock absorber having an axle hole through which the axle passes, and the arm are formed by bending inside both wheels and integrally formed.

The shock-absorbing caster of the present invention supports the axle via a coil spring between the axle and the turning frame, supports turning via a turning sliding plate between the turning frame and the fixed frame, and provides a movable body fixed seat surface. A caster that is fixed to a movable body and travels on a traveling road surface, and is formed by bending an axle on which wheels are rotated to hold both ends, a turning hole seat having a turning hole, and a right and left of the turning hole seat. A swivel frame of a concave plate-like body having a plurality of arms, the swivel frame having a coil spring seat hole in the arm, and a coil spring member composed in the coil spring seat hole of the swivel frame, The coil spring member having an axle hole through which the axle passes, a shaft end screw for fixing the axle end face to the coil spring member, a rectangular plate-like body, and a cylindrical turning guide provided at the center of the square plate-like body; A fixed frame having movable body mounting holes at four corners of a rectangular plate-like body, wherein the cylindrical turning guide is fitted to the turning hole of the turning frame, and is fitted to the cylindrical turning guide. The swivel slide plate is configured to have an integral structure having the swivel slide plate positioned between the swivel frame and the fixed frame.

The shock-absorbing caster of the present invention is supported between the axle and the frame via a shock-absorbing member to suppress vibration when traveling on the uneven road surface at a speed faster than walking, and further between the fixed frame and the turning frame. By using a swing sliding member, the simple structure eliminates the root of abnormal noise generation, effectively suppresses vibrations transmitted from the wheel axle, and provides a turning resistance according to the load. As a result, it is possible to suppress lateral vibration and meandering. There is an advantage.

The effect of claim 1 is that, compared with the “prior art document”, the axle support of the present invention absorbs the vertical displacement by the buffer member between the axle and the frame, and the axle vibration is effectively mitigated and transmitted to the frame. . In addition, the turning support can provide a turning resistance in accordance with the vertical load, so that a lateral shake is suppressed. Further, since the axle support is transmitted to the frame via the buffer member, vibrations in the front-rear direction and the left-right direction can be mitigated, and the structure is small and simple. There is an advantage that said.

The effect of claim 2 is the same as that of claim 1 except for the swivel support, and has the advantage that it can be constructed into a frame that is easy to manufacture.

The effect of claim 3 is the same as that of claim 1, but there is an advantage that other parts can be diverted by changing the shapes of the frame and the swivel frame.

The effect of claim 4 is the same as that of claim 1, but has the advantage that vibration can be suppressed by taking a large displacement in the vertical direction by supporting the axle using a coil spring as a buffer member.

Furthermore, the effects of the present invention are advantageous in that the design is improved by making the structure compact, the manufacturing is facilitated, and the weight is reduced.

In Example 1 of this invention, it is the top view (a) and side view (b) which showed the flat turning buffer caster 101 of a buffer body axle shaft support. One side of the plan view (a) shows a cross section as viewed in the direction of arrow B in FIG. 2, and one side of the side view (b) shows a central section of the turning portion, and a turning sliding plate is provided between the turning frame and the fixed frame. It is explanatory drawing. It is a front view of FIG. One side of the front view shows an AA cross section of the center portion of the axle, and is an explanatory view in which the axle is supported via a buffer body between the axle and the turning frame. In Example 2 of this invention, it is the top view (a) and side view (b) which showed the flat fixed buffer caster 102 of a buffer body axle shaft support. One side of the plan view (a) shows an axle central cross section, and is an explanatory view in which the axle is supported via a buffer between the axle and the frame. In Example 3 of this invention, it is the front view which showed the flat fixed double-wheel buffer caster 103 of a buffer body axle shaft support. One side of the front view shows an axle center cross section, and is an explanatory view of a twin wheel and axle support relationship. In Example 4 of this invention, it is the top view (a) and side view (b) which showed the flat turning buffer caster 104 of a coil spring axle support. One side of the plan view shows a cross-sectional view of the upper surface of the coil spring, and is an explanatory view of the turning frame and the coil spring support portion. FIG. 6 is a front view of FIG. 5. One side of the front view (a) shows an axle center section and a turning section center section, and is an explanatory view of the axle support and turning holding section. FIG. 3 is a side view when FIG. 1 of the present invention is inserted into a swivel shock absorbing caster 105 and is an explanatory view of a movable body fixing portion.

In the shock caster, the axle is supported between the axle and the frame through a shock absorber to reliably suppress the vibration. Further, in the turning caster, the swinging caster is held between the turning frame and the fixed frame via a turning sliding plate and is laterally supported. The purpose of reducing vibration or meandering and reducing the damage to parts and the generation of abnormal noise due to impact force has been realized in a compact form without reducing the number of parts and aesthetics.

1 and 2, the first embodiment is a flat turning buffer caster 101 that supports a shock absorber axle that travels on a road surface 9, and the shock absorber 3 is interposed between the axle 2 and the turning frame 5. As shown in FIG. As a caster that supports the axle 2 and supports the turning between the turning frame 5 and the fixed frame 7 via the turning sliding plate 6, the axle support is the axle of the axle 2 in which the wheels 1 are rotated and both ends are held. The shock absorber 3 is formed by integrating the shock absorber 32 between the inner cylinder 31 fitted to the fitting portion 21 and the outer cylinder 33 fitted to the revolving frame 5. The swivel frame 5 includes a swivel hole seat 51 at the center of the concave plate-like body 50 and an arm 52 formed by bending the swivel hole seat 51 at the left and right of the swivel hole seat 51 and a buffer fitting seat 53 at the tip of the arm 52. The shock absorber 3 is fitted to the axle 2 and the turning frame 5 and supports the axle 2 by a shaft end fixing screw 8 that fixes the axle end surface 22. In addition, the fixed frame 7 is provided with a swivel frame 5 fitted into a cylindrical swivel guide 71 provided with a cylindrical swivel holding hole 61 in a cylindrical swivel guide 71 provided at the center of the rectangular plate-shaped body 70 to support swivel. Furthermore, the movable body mounting holes 72 are provided at the four corners of the rectangular plate-shaped body 70 so that the movable body is attached to the movable body fixed seat surface 10.

Further, the revolving frame 5 and the fixed frame 7 of the first embodiment enable the steel plate press molding, and the buffer body 3 is fitted and held by press fitting or the like to the axle 2 and the revolving frame 5, and the buffer member 32 is They can be integrated by press-fitting using a rubber material or a resin material that is easily elastically deformed. Further, the swivel slide plate 6 is made of a resin with excellent friction and wear characteristics and has a hooked shape, and the tip of the cylindrical swivel guide 71 can be held open by press molding or the like.

Furthermore, the buffer body 3 of Example 1 can also be set so that the buffer member has a hollow cross section as a shape that matches the material characteristics that can obtain the optimum spring characteristics depending on the use conditions.

The embodiment 2 is a flat fixed shock-absorbing caster 102 for supporting the shock absorber axle that travels on the road surface 9 as shown in FIG. 3, and the axle support is provided between the axle 2 and the frame 4 via the shock absorber 3. As a caster for attaching the movable body to the frame 4, the axle support is performed between the inner cylinder 31 that fits the axle 2 in which the wheel 1 rotates and both ends are held, and the outer cylinder 33 that fits the frame 4. The frame 4 is formed by bending the movable body fixed seat 41 at the center of the concave plate-like body 40 and the left and right sides of the movable body fixed seat 41 respectively. The arm 43 and a shock absorber fitting seat 44 are provided at the tip of the arm 43, and the shock absorber 3 is fitted between the axle 2 and the frame 4 and supports the axle 2 by a shaft end fixing screw 8 that fixes the axle end surface 22. . Further, the movable body is mounted on the movable body fixed seat surface 10 by the movable body mounting holes 42 provided at the four corners of the movable body fixed seat 41.

The third embodiment is a flat fixed twin-wheel buffer caster 103 that supports a shock absorber axle that travels on a road surface 9 as shown in FIGS. 3 and 4, and the shock absorber 3 is interposed between the axle 2 and the frame 4. As a twin-wheel caster that supports the axle and attaches the movable body to the movable body fixed seating surface 10, the axle support includes an inner cylinder 31 and a frame that fits the axle 2 in which the wheels 1 on both sides rotate to hold the central portion. The frame 4 is composed of a movable body fixed seat 41 and a movable body at the center of the concave plate-shaped body 40. A movable body mounting hole 42 is provided at each of the four corners of the fixed seat 41, and 43 arms formed by bending the left and right sides of the movable body fixed seat 41 and a buffer fitting seat 44 at the tip of the arm 43 are provided. 2 is fitted between the frame 4 and the axle end face 22 is fixed. The axle 2 is supported by the end fixing screws 8. Further, the movable body is mounted on the movable body fixed seat surface 10 by the movable body mounting holes 42 provided at the four corners of the movable body fixed seat 41.

The fourth embodiment is a flat turning cushioning caster 104 that supports a coil spring axle as shown in FIGS. 5 and 6, and the axle is supported between the axle 2 and the turning frame 5 via a coil spring member 121. As a shock-absorbing caster that turns and supports between the frame 5 and the fixed frame 7 via the turning sliding plate 6, the axle support includes a vehicle bearing seat 13 that fits the axle 2 on which the wheels 1 rotate and both ends are held. The axle 2 is supported by a shaft end fixing screw 8 that fixes the axle end surface 22 between the coil spring 12 and the coil spring seat 14 between the turning frame 5. The vehicle bearing seat 13 includes a guide groove 131, a bearing hole 132, and a spring lower surface support seat 133, and the coil spring seat 14 includes a fitting protrusion 141 and a spring seat 142. The revolving frame 5 includes a revolving hole seat 51 at the center of the concave plate-like body 50 and a coil spring seat hole 54 provided on the upper surface between the left and right centers of the arms 52 formed by bending the left and right sides of the revolving hole seat 51. A guide groove receiver 55 and a spring insertion hole 56 provided on the side surface are provided. In addition, the fixed frame 7 is supported by turning the turning frame 5 through the turning sliding plate 6 provided with the cylindrical turning holding seat 61 in the cylindrical turning guide 71 provided at the center of the rectangular plate-like body 70. In addition, the movable body is attached to the movable body fixed seat surface 10 by the movable body attachment holes 72 provided at the four corners of the rectangular plate-like body 70.

Further, as the material of the vehicle bearing seat 13 used in the fourth embodiment, a resin having excellent mechanical strength and wear characteristics is used.

Further, the movable body mounting hole 72 of the first to fourth embodiments is configured to be flattened on the movable body fixed seat surface 10 with four bolts, but like the insertion swivel buffer caster 105 of the shock absorber axle support shown in FIG. In addition, it is possible to adopt a configuration of insertion and screwing.

Further, the turning support in Examples 1 and 4 has a configuration that does not hinder the use of a ball bearing instead of the turning sliding plate 6, and Example 2 can be applied to any turning support.

The structure in which the axle is supported between the front and rear wheel forks and the axle via a shock absorber can be applied to an application for improving the riding comfort of the bicycle.

DESCRIPTION OF SYMBOLS 1 Wheel 2 Axle 21 Axle fitting part 22 Axle end surface 3 Buffer body 31 Inner cylinder 32 Buffer member 33 Outer cylinder 4 Frame 40 Concave plate-shaped body 41 Movable body fixing seat 42 Movable body mounting hole 43 Arm 44 Buffer body fitting seat 5 Revolving frame 50 Concave plate 51 Revolving hole seat 52 Arm 53 Buffer fitting seat 54 Coil spring seat hole 55 Guide groove receiver 56 Spring insertion hole 6 Revolving slide plate 61 Revolving holding hole 7 Fixed frame 70 Square plate 71 Cylindrical turning guide 72 Movable body mounting hole 8 Shaft end fixing screw 9 Traveling road surface 10 Movable body fixed seat surface 11 Insert member 12 Coil spring 121 Coil spring member 13 Car bearing seat 131 Guide groove 132 Bearing hole 133 Spring lower surface support seat 14 Coil spring seat 141 Fitting projection 142 Spring upper seat 101 Flat swing buffer caster 102 supporting shock absorber axle 102 Flat fixed shock caster supporting shock absorber axle 103 flat fixed shock-absorbing casters 104 for shock absorber axle support flat swivel shock absorbers for coil spring axle support 105 insertion swivel shock absorbers for shock absorber axle support

Claims (4)

An axle on which the wheels rotate and both ends are held,
A swivel frame of a concave plate-like body having a swivel hole seat having a swivel hole and arms formed by bending each of the swivel hole seat on the left and right sides, and a cylindrical buffer fitting seat on the arm The swivel frame comprising:
A shock absorber fitted to the shock absorber fitting seat of the swivel frame, the shock absorber having an axle fitting portion through which the axle passes;
A shaft end screw for fixing an axle end surface to the buffer body;
A rectangular plate-like body, a cylindrical turning guide provided in the center of the rectangular plate-like body, and a fixed frame provided with movable body mounting holes at four corners of the rectangular plate-like body, wherein the cylindrical turning guide is the turning The fixed frame that fits into the pivot hole of the frame;
A shock-absorbing caster having a swivel slide plate fitted to the cylindrical swivel guide, the swivel slide plate positioned between the swivel frame and the fixed frame. An axle on which the wheels rotate and both ends are held,
A frame of a concave plate-like body having a movable body fixed seat surface and arms formed by bending the left and right sides of the movable body fixed seat surface provided with movable body mounting holes at four corners of the movable body fixed seat surface. The frame having a cylindrical buffer fitting seat on the arm;
A shock absorber fitted to the shock absorber fitting seat of the frame, the shock absorber having an axle hole through which the axle penetrates;
A buffer caster having a shaft end screw for fixing an axle end surface to the buffer body. An axle on which the wheel rotates to hold the center,
The movable body fixed seat surface, and the arms formed by bending the arms on the inner sides of both wheels on the left and right of the movable body fixed seat surface provided with movable body mounting holes at four corners of the movable body fixed seat surface, respectively. A frame of a concave plate-like body, the frame having a cylindrical buffer fitting seat on the arm;
A shock absorber fitted to the shock absorber fitting seat of the frame, the shock absorber having an axle hole through which the axle penetrates;
The shock-absorbing caster according to claim 2, wherein the arm is formed by bending inside both wheels. An axle on which the wheels rotate and both ends are held,
A swivel frame of a concave plate-like body having a swivel hole seat having a swivel hole and arms formed by bending each of the swivel hole seat on the left and right sides, and the swivel frame having a coil spring seat hole in the arm When,
A coil spring member composed in the coil spring seat hole of the swivel frame, the coil spring member having an axle hole through which the axle passes;
A shaft end screw for fixing an axle end surface to the coil spring member;
A rectangular plate-like body, a cylindrical turning guide provided in the center of the rectangular plate-like body, and a fixed frame provided with movable body mounting holes at four corners of the rectangular plate-like body, wherein the cylindrical turning guide is the turning The fixed frame that fits into the pivot hole of the frame;
A shock-absorbing caster having a swivel slide plate fitted to the cylindrical swivel guide, the swivel slide plate positioned between the swivel frame and the fixed frame.

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