A pressure wheel

Abstract

The present invention discloses a pressure wheel, comprising a foot fork, the foot fork having two foot fork pieces arranged symmetrically, a brake block being arranged on the foot fork, a guide hole extending upward and in the direction opposite to the brake block being opened on the foot fork piece, a wheel axle being slidably connected in the guide hole, a wheel arranged between the two foot fork pieces being rotatably connected on the wheel axle, an elastic member being arranged on the foot fork piece to abut against the wheel axle and keep it naturally at the lower end of the guide hole; when the wheel axle is located at the lower end of the guide hole, the wheel surface of the wheel is in close contact with the brake block; the elastic member is a torsion spring; the elastic member comprises a spring body, a first torsion arm extending from one end of the spring body and a second torsion arm extending from the other end, the second torsion arm being fixed on the foot fork piece, the first torsion arm abutting against the wheel axle and keeping it naturally at the lower end of the guide hole. The pressure wheel has the characteristics of strong bearing capacity and good braking effect, complete overall functions and strong practicality.

Description

Technical Field

[0001] The present invention relates to a caster, and more particularly to a pressure wheel. Background Art

[0002] When a traditional caster needs to brake, the brake pad or brake block must be manually controlled to make it close to the wheel surface to limit the rotation of the wheel; when the brake needs to be released, the brake pad or brake block must be reset, which is a cumbersome process and easy to forget. In addition, when the external thrust is large, the brake pad or brake block is very easy to break free, which poses a safety hazard and has a poor overall effect. Based on this, the present invention proposes a pressure wheel. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a pressure wheel having the characteristics of strong bearing capacity and good braking effect.

[0004] To solve the above technical problems, the object of the present invention is achieved as follows: the pressure wheel involved in the present invention includes a foot fork, the foot fork has two foot fork plates arranged symmetrically on the left and right, the foot fork is provided with a brake block, the foot fork plate is provided with a guide hole extending upward and away from the brake block, a wheel axle is slidably connected in the guide hole, a wheel arranged between the two foot fork plates is rotatably connected on the wheel axle, the foot fork plate is provided with an elastic member which resists the wheel axle and naturally maintains it at the lower end of the guide hole; when the wheel axle is located at the lower end of the guide hole, the wheel surface is in close contact with the brake block.

[0005] The present invention is further configured as follows: the elastic member is a torsion spring; the elastic member includes a spring body, a first torsion arm extends from one end of the spring body, a second torsion arm extends from the other end, the second torsion arm is fixed on the fork plate, and the first torsion arm resists the wheel axle and naturally maintains it at the lower end of the guide hole.

[0006] The present invention is further configured as follows: a positioning column is provided on the fork piece, and the spring body is sleeved on the positioning column.

[0007] The present invention is further configured as follows: an insertion hole is provided on the fork piece, and the second torsion arm is fixed in the insertion hole.

[0008] In summary, the present invention has the following beneficial effects: the pressure wheel involved in the present invention can maintain self-locking in a natural state without pressure, so that the wheel cannot rotate, thereby achieving a good braking effect; and the pressure wheel has a strong load-bearing capacity, can be used in combination with a single wheel, has a good braking effect, has complete overall functions, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0010] Figure 2 It is a partial structural schematic diagram of the present invention;

[0011] Figure 3 It is a partial structural schematic diagram of the present invention;

[0012] Figure 4 It is a schematic diagram of the structure of the positioning column used in the present invention;

[0013] Figure 5 It is a schematic diagram of the structure of the wheel used to embody the present invention;

[0014] Figure 6 It is a schematic diagram of the structure of the elastic member of the present invention. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred embodiments of the present invention are described below in conjunction with specific embodiments, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the patent requirements of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0016] The present invention is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0017] Example 1

[0018] See also Figures 1 to 6 As shown, a pressure wheel involved in this embodiment includes a fork 1, the fork 1 has two fork pieces 2 which are symmetrically arranged on the left and right, a brake block 3 is provided on the fork 1, a guide hole 4 extending upward and away from the brake block 3 is opened on the fork piece 2, a wheel axle 5 is slidably connected in the guide hole 4, a wheel 6 arranged between the two fork pieces 2 is rotatably connected on the wheel axle 5, and an elastic member 7 is provided on the fork piece 2 for resisting the wheel axle 5 and naturally maintaining it at the lower end of the guide hole 4; when the wheel axle 5 is located at the lower end of the guide hole 4, the wheel surface of the wheel 6 is in close contact with the brake block 3.

[0019] Furthermore, the elastic member 7 is a torsion spring; the elastic member 7 includes a spring body 71, a first torsion arm 72 extends from one end of the spring body 71, and a second torsion arm 73 extends from the other end, the second torsion arm 73 is fixed on the fork plate 2, and the first torsion arm 72 resists the wheel axle 5 and keeps it naturally at the lower end of the guide hole 4.

[0020] Furthermore, a positioning column 8 is provided on the fork plate 2 , and the spring body 71 is sleeved on the positioning column 8 .

[0021] Furthermore, a plug hole 9 is provided on the fork piece 2 , and the second torsion arm 73 is fixed in the plug hole 9 .

[0022] In this embodiment, when the load on the fork 1 is within a set range, the first torsion arm 72 abuts against the axle 5, and the axle 5 is still kept at the lower end position of the guide hole 4, so that the wheel surface of the wheel 6 is closely attached to the brake block 3, and the wheel 6 is restricted from rotating relative to the fork 1, thereby realizing the braking function;

[0023] When the load on the fork 1 is greater than the set range, the first torsion arm 72 continues to press against the wheel axle 5. However, due to the large downward force, the spring body 71 is twisted through the force transmitted on the first torsion arm 72, and the wheel axle 5 slides upward along the guide hole 4 to the upper end of the guide hole 4, causing the wheel surface of the wheel 6 to disengage from the brake block 3 and release the brake. At this time, if a forward and backward thrust is applied, the wheel 6 can rotate relative to the fork 1.

[0024] In the above scheme, the guide hole 4 is set to extend upward and away from the brake block 3, so that when the lateral thrust is large, the wheel axle 5 cannot easily break away from the first torque arm 72, avoiding the wheel 6 from rolling when the load force above the fork 1 is insufficient, thereby further improving the safety of use.

[0025] The positioning column 8 is added to be used for positioning and installing the spring body 71 on the elastic member 7 (ie, the torsion spring).

[0026] The additional insertion hole 9 is used for positioning and installing the second torsion arm 73 on the elastic member 7 (ie, the torsion spring).

[0027] The pressure wheel involved in the present invention can maintain self-locking in a natural state without pressure, so that the wheel cannot rotate, achieving a good braking effect; and the pressure wheel has a strong load-bearing capacity, can be used in conjunction with a single wheel, has a good braking effect, has complete overall functions, and is highly practical.

[0028] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationship are based on the orientation or positional relationship actually shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in combination with the embodiments and according to specific circumstances.

[0029] Unless otherwise clearly specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A pressure wheel, comprising a fork, the fork having two fork pieces arranged symmetrically on both sides, characterized in that: The fork is provided with a brake block, the fork plate is provided with a guide hole extending upward and in the direction opposite to the brake block, a wheel axle is slidably connected in the guide hole, a wheel arranged between the two fork plates is rotatably connected on the wheel axle, and an elastic member is provided on the fork plate to abut against the wheel axle and keep it naturally at the lower end of the guide hole; when the wheel axle is located at the lower end of the guide hole, the wheel surface is in close contact with the brake block; The elastic member is a torsion spring; the elastic member includes a spring body, a first torsion arm extends from one end of the spring body, and a second torsion arm extends from the other end, the second torsion arm is fixed on the fork plate, and the first torsion arm resists the wheel axle and naturally maintains it at the lower end of the guide hole.

2. The pressure wheel according to claim 1, characterized in that: The fork piece is provided with a positioning column, and the spring body is sleeved on the positioning column.

3. The pressure wheel according to claim 1 or 2, characterized in that: The fork piece is provided with an inserting hole, and the second torsion arm is fixed in the inserting hole.

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