Automatic reversing prevention mechanism for trolley pulley

Abstract

The utility model discloses a trolley pulley anti-automatic reversing mechanism which comprises a top plate, a pulley assembly and a positioning assembly used for fixing the direction of the pulley assembly, the pulley assembly comprises a wheel carrier and a pulley rotationally arranged in the wheel carrier, the wheel carrier is provided with a cylindrical part, and a plurality of positioning holes are formed in the outer end face of the cylindrical part in the circumferential direction; the positioning assembly comprises a positioning seat, a pull handle, a spring and an insertion rod matched with the positioning holes, the positioning seat is arranged on one side of one positioning hole, a through hole allowing the insertion rod to penetrate through is formed in the positioning seat in the transverse direction, the insertion rod is sleeved with the spring, the tail end of the spring is fixed in the positioning seat, and the pull handle is arranged on the insertion rod. And when the spring is in a compressed state. The positioning assembly used for limiting the moving direction of the pulley assembly is designed on one side of the pulley assembly, when the pulley assembly needs to move in one direction, the inserting rod can be correspondingly inserted into the positioning hole in the corresponding direction, and the advantage that the pulley assembly can be adjusted to be in directional driving at any time is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of trolley travel, in particular to a trolley pulley anti-automatic reversing mechanism. Background Art

[0002] A logistics trolley, also known as a cargo trolley, cage trolley, or turnover trolley, is a unit-moving containerized device equipped with four pulleys (universal wheels) for transporting and storing materials. It is commonly used for logistics distribution in large supermarkets or for logistics turnover between factory processes.

[0003] However, the above-mentioned pulley (universal wheel) has certain defects during use. When the trolley needs to be transported back and forth in one direction, due to the horizontal 360-degree rotation characteristics of the universal wheel, the direction of the moving trajectory may change during transportation. This requires the user to use greater force to move the object in the changed direction and adjust the moving trajectory of the universal wheel in real time, which is very inconvenient.

[0004] In view of this, a trolley pulley anti-automatic reversing mechanism is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a trolley pulley anti-automatic reversing mechanism in order to solve the above-mentioned problems.

[0006] The technical solution adopted by the present invention is as follows: a trolley pulley anti-automatic reversing mechanism, comprising a top plate, a pulley assembly and a positioning assembly for fixing the direction of the pulley assembly, wherein the pulley assembly comprises a wheel frame and a pulley rotatably arranged in the wheel frame, the wheel frame has a cylindrical portion and a plurality of positioning holes are circumferentially provided on the outer end surface of the cylindrical portion; the positioning assembly comprises a positioning seat, a handle, a spring and an insertion rod arranged in cooperation with the positioning hole, the positioning seat is arranged on one side of one of the positioning holes, the positioning seat is horizontally opened with a through hole for the insertion rod to pass through, the spring is sleeved on the insertion rod, and the tail end of the spring is fixed in the positioning seat, and when the spring is in a compressed state, the end of the insertion rod is inserted into one of the positioning holes to limit the walking direction of the pulley assembly.

[0007] In a preferred embodiment, a limiting seat is symmetrically provided on the outer end surface of the positioning seat, and the limiting seat is sunken in the longitudinal direction to form a limiting groove, and the limiting groove is located on the left side of the handle.

[0008] In a preferred embodiment, the handle is placed outside the positioning seat, and blocks that can be engaged with the limiting groove are symmetrically provided at both ends of the handle. When the blocks are engaged with the limiting groove, the insertion rod is located outside the positioning hole.

[0009] In a preferred embodiment, a fixing plate is integrally provided on the top of the positioning seat, and the fixing plate is fixed to the bottom of the top plate by screws.

[0010] In a preferred embodiment, an arc-shaped surface is integrally formed on one end of the insertion rod facing the positioning hole.

[0011] In a preferred embodiment, the top of the wheel frame is rotated to the bottom of the top plate, and waist-shaped holes are opened at the four corners of the top plate.

[0012] In a preferred embodiment, a brake for locking the pulley is further provided on one side of the wheel frame.

[0013] In summary, due to the adoption of the above-mentioned technical solution, the beneficial effect of the utility model is as follows: a positioning assembly is designed on one side of the pulley assembly to limit the moving direction of the pulley assembly. When it needs to move in one direction, the insertion rod can be inserted into the positioning hole in the corresponding direction. When it is required to meet universal movement, the corresponding card block can be inserted into the limit groove. At this time, the locking state can be released, which has the advantage that the pulley assembly can be adjusted to directional travel at any time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front plan structure of the entire utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional plan structure of the positioning component in the present invention;

[0016] Figure 3 This is a schematic side view of the planar structure of the positioning assembly in the present invention.

[0017] Markings in the figure: 1-top plate, 2-positioning hole, 3-positioning assembly, 301-limiting seat, 302-handle, 303-insertion rod, 304-arc surface, 305-limiting groove, 306-spring, 307-block, 308-positioning seat, 4-wheel frame, 5-pulley, 6-brake, 7-fixing plate. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] Reference Figure 1-3, a trolley pulley anti-automatic reversing mechanism, including a top plate 1, a pulley assembly and a positioning assembly 3 for fixing the direction of the pulley assembly, wherein the pulley assembly includes a wheel frame 4 and a pulley 5 rotatably arranged in the wheel frame 4, the wheel frame 4 has a cylindrical portion and a plurality of positioning holes 2 are provided in the circumferential direction of the outer end surface of the cylindrical portion, the positioning assembly includes a positioning seat 308, a handle 302, a spring 306 and an insertion rod 303 provided in conjunction with the positioning hole 2, the positioning seat 308 is provided on one side of one of the positioning holes 2, and the positioning seat 308 is opened in the transverse direction. There is a through hole for the insertion rod 303 to pass through, and the spring 306 is sleeved on the insertion rod 303, and the tail end of the spring 306 is fixed in the positioning seat 308. When the spring 306 is in a compressed state, the end of the insertion rod 303 is inserted into one of the positioning holes 2 to limit the traveling direction of the pulley assembly. When it is necessary to move in one direction, the rebound force of the spring 306 can be used to insert the insertion rod 303 into the positioning hole 2 in the corresponding direction. This has the advantage that the pulley assembly can be adjusted to directional travel at any time.

[0020] There are at least four positioning holes 2 equidistantly distributed around the wheel frame 4 to enable directional movement in the front, back, left, and right directions.

[0021] Furthermore, a limit seat 301 is symmetrically provided on the outer end face of the positioning seat 308, and the limit seat 301 sinks longitudinally to form a limit groove 305, and the limit groove 305 is located on the left side of the pull handle 302. The pull handle 302 is placed outside the positioning seat 308, and blocks 307 that can be connected to the limit groove 305 are symmetrically provided at both ends of the pull handle 302. When the block 307 is connected to the limit groove 305, the insertion rod 303 is located outside the positioning hole 2. When the pulley assembly needs to be able to move universally, pull the pull handle 302 outward and rotate the pull handle 302 so that the block 307 is aligned with the limit groove 305, and then the pull handle 302 is loosened. Under the action of the rebound force, the block 307 is stuck in the limit groove 305, so that the insertion rod 303 is separated from the positioning hole 2. At this time, the pulley assembly can move in any direction.

[0022] Furthermore, a fixing plate 7 is integrally provided on the top of the positioning seat 308 , and the fixing plate 7 is fixed to the bottom of the top plate 1 by screws.

[0023] Furthermore, an arcuate surface 304 is integrally formed at one end of the insertion rod 303 facing the positioning hole 2. Since the contact area between the arcuate surface 304 and the cylindrical portion of the wheel frame 4 is small, the rotation resistance of the wheel frame 4 is small, thereby facilitating adjustment of the corresponding moving direction of the wheel frame 4.

[0024] Furthermore, the top of the wheel frame 4 is rotated to the bottom of the top plate 1, and waist-shaped holes are opened at the four corners of the top plate 1. Through the designed waist-shaped holes, the pulley assembly can be fixed to the bottom of the trolley by bolts.

[0025] Furthermore, a brake 6 for locking the pulley 5 is provided on one side of the wheel frame 4. When the trolley needs to be stabilized in one position, the brake shoe of the brake 6 clamps the pulley 5 to prevent the wheel from rotating, thereby achieving a braking effect.

[0026] The brake mainly includes a lever structure, a brake shoe and other structures. Since the brake 6 of the universal wheel is an existing technology, the specific structure will not be elaborated here.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A trolley pulley anti-automatic reversing mechanism, characterized in that: It includes a top plate, a pulley assembly and a positioning assembly for fixing the direction of the pulley assembly, wherein the pulley assembly includes a wheel frame and a pulley rotatable in the wheel frame, the wheel frame has a cylindrical portion and a plurality of positioning holes are circumferentially provided on the outer end surface of the cylindrical portion; the positioning assembly includes a positioning seat, a handle, a spring and an insertion rod arranged in cooperation with the positioning hole, the positioning seat is arranged on one side of one of the positioning holes, the positioning seat is horizontally opened with a through hole for the insertion rod to pass through, the spring is sleeved on the insertion rod, and the tail end of the spring is fixed in the positioning seat, when the spring is in a compressed state, the end of the insertion rod is inserted into one of the positioning holes to limit the walking direction of the pulley assembly.

2. The trolley pulley anti-automatic reversing mechanism according to claim 1, characterized in that: A limiting seat is symmetrically provided on the outer end surface of the positioning seat, and the limiting seat is sunken in the longitudinal direction to form a limiting groove, and the limiting groove is located on the left side of the handle.

3. The trolley pulley anti-automatic reversing mechanism according to claim 2, characterized in that: The handle is placed outside the positioning seat, and blocks that can be engaged with the limiting grooves are symmetrically provided at both ends of the handle. When the blocks are engaged with the limiting grooves, the insertion rod is located outside the positioning hole.

4. The trolley pulley anti-automatic reversing mechanism according to claim 1, characterized in that: A fixing plate is integrally provided on the top of the positioning seat, and the fixing plate is fixed to the bottom of the top plate by screws.

5. The trolley pulley anti-automatic reversing mechanism according to claim 1, characterized in that: An arc-shaped surface is integrally formed on one end of the insertion rod facing the positioning hole.

6. The trolley pulley anti-automatic reversing mechanism according to claim 1, characterized in that: The top of the wheel frame is rotated to the bottom of the top plate, and waist-shaped holes are opened at four corners of the top plate.

7. The trolley pulley anti-automatic reversing mechanism according to claim 1, characterized in that: One side of the wheel frame is also provided with a brake for locking the pulley.

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