Novel plastic stop block

Abstract

The utility model relates to the technical field of inner curve hydraulic motors, in particular to a novel plastic check block. Comprising a plastic stop block, a roller is arranged in the plastic stop block, a piston assembly is arranged on the outer side of the plastic stop block, a rotor assembly is arranged on the outer side of the piston assembly, the plastic stop block is composed of a plastic stop block body, a reinforcing protruding step edge and an edge protrusion, a base body of the plastic stop block body is round, and the size of the base body is matched with the appearance of the roller. The edge protrusion is arranged on the edge of the outer side of the plastic check block body, is semicircular and is used for wrapping and limiting swinging of the roller, and the reinforcing protruding step edge is located on the inner side of the edge protrusion. According to the novel plastic check block provided by the utility model, the stress distribution path is optimized and the anti-fatigue performance is obviously improved by introducing the integrated design of the reinforced convex step edge and the semicircular edge bulge.

Description

Technical Field

[0001] This utility model relates to the field of internal curve hydraulic motor technology, and in particular to a novel plastic stop. Background Technology

[0002] In an internal curved radial piston hydraulic motor, the rotor assembly and the piston assembly within the bore are the core moving parts. The rotor assembly rotates continuously under hydraulic drive, while the piston assembly reciprocates along the rotor bore under hydraulic pressure. When the piston contacts the curved cam, it experiences a reaction force from the cam, generating a tangential force and circumferential torque, driving the piston to rotate and causing the rollers to oscillate within the piston groove. During this process, the plastic stop block must withstand the thrust of the rollers and the rotational force of the piston; its structural strength directly affects the operational stability and service life of the hydraulic motor.

[0003] In existing technologies, traditional plastic stops typically employ a simple planar connection structure. Due to the prolonged exposure to concentrated loads from the rollers and rotational stress from the piston, stress concentration easily occurs at the intermediate connection points, leading to fatigue fracture. These problems not only reduce the service life of the plastic stops but can also cause wear or even jamming of internal components of the hydraulic motor due to stop fracture, increasing equipment maintenance costs and safety hazards. Utility Model Content

[0004] This invention provides a novel plastic stop block that optimizes stress distribution path and significantly improves fatigue resistance by introducing an integrated design that strengthens the protruding step edge and the semi-circular edge protrusion.

[0005] The technical solution adopted by this utility model is as follows: a novel plastic stop block, comprising a plastic stop block, a roller provided inside the plastic stop block, a piston assembly provided on the outer side of the plastic stop block, a rotor assembly provided on the outer side of the piston assembly, the plastic stop block being composed of a plastic stop block body, a reinforcing protruding step edge, and an edge protrusion, the base of the plastic stop block body being circular and its size being adapted to the shape of the roller, the edge protrusion being provided on the outer edge of the plastic stop block body and the edge protrusion being semi-circular, used to enclose and restrict the swing of the roller, and the reinforcing protruding step edge being located on the inner side of the edge protrusion.

[0006] As a further improvement of this utility model, the plastic block body, the edge protrusion, and the reinforcing protruding step edge are integrally formed.

[0007] As a further improvement of this utility model, the cross-section of the reinforcing protruding step edge is a right trapezoid and its inclined surface faces the central axis of the plastic block body.

[0008] As a further improvement of this utility model, the width of the reinforcing protruding step edge gradually increases along the radial direction of the plastic block body to form a gradient support structure.

[0009] The beneficial effects of this utility model are: the raised step plastic block of this utility model has better strength and longer service life; during the movement, the reinforced edge of the raised step can offset some of the stress transmitted by the roller, making it less likely to break at this point. Attached Figure Description

[0010] Figure 1 This is a cross-sectional structural diagram illustrating an application example of a novel plastic stop block according to this utility model.

[0011] Figure 2 This is an isometric view of a novel plastic stop block according to this utility model;

[0012] Figure 3 This is a front view of a novel plastic block according to this utility model;

[0013] Figure 4 This is a cross-sectional view of a novel plastic block according to this utility model.

[0014] As shown in the figure: 1. Rotor assembly; 2. Piston assembly; 3. Roller; 4. Plastic stop; 41. Plastic stop body; 42. Reinforced protruding step edge; 43. Edge protrusion. Detailed Implementation

[0015] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to their structure and are relative concepts. Therefore, they may vary depending on their location and usage; thus, these or other directional terms should not be interpreted as restrictive terms.

[0016] The singular forms “a,” “the,” and “the” used in this specification are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes one or more of the associated listed items, any or all possible combinations thereof.

[0017] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0018] This utility model provides the following: Figure 1-4The novel plastic stop block shown includes a plastic stop block 4, a roller 3 inside the plastic stop block 4, a piston assembly 2 on the outside of the plastic stop block 4, and a rotor assembly 1 on the outside of the piston assembly 2. The plastic stop block 4 is composed of a plastic stop block body 41, a reinforcing protruding step edge 42, and an edge protrusion 43. The base of the plastic stop block body 41 is circular and its size is adapted to the shape of the roller 3. The edge protrusion 43 is located on the outer edge of the plastic stop block body 41 and is semi-circular, used to contain and restrict the swing of the roller 3. The reinforcing protruding step edge 42 is located inside the edge protrusion 43.

[0019] like Figure 2-4 As shown, in this utility model, the plastic block body 41, the edge protrusion 43, and the reinforcing protruding step edge 42 are integrally molded, which improves the overall strength of the plastic block 4, simplifies the manufacturing process, and reduces production costs.

[0020] like Figure 2-4 As shown, the cross-section of the reinforcing protruding step edge 42 in this utility model is a right trapezoid and its inclined surface faces the central axis of the plastic block body 41, which enables the reinforcing protruding step edge 42 to better disperse and resist the stress transmitted by the roller 3, and further improves the fatigue resistance of the plastic block 4.

[0021] like Figure 2-4 As shown, in this utility model, the width of the reinforced protruding step edge 42 gradually increases along the radial direction of the plastic block body 41 to form a gradient support structure, which can more effectively disperse stress and also enhance the stability of the plastic block 4 during long-term use.

[0022] Working principle: In the specific implementation of this utility model, when the oil drives the rotor assembly 1 to move, the piston assembly 2 moves in the hole of the rotor assembly 1 under the push of the hydraulic oil. When it contacts the curved cam, it will be subjected to the reaction force of the curved cam, generating a tangential force and a circumferential torque. This torque will drive the piston to rotate, and the tangential force will push the piston to return to the rotor hole in a straight line. During this period, the roller 3 is driven to swing in a straight line in the piston groove. The plastic stop block body 41 needs to resist the thrust of the roller 3 in this movement, the outer edge resists the thrust of the curved cam, and the edge protrusion 43 resists the rotational force of the piston. The increased reinforcement of the protruding step edge 42 strengthens the plastic stop block body 41 and the edge protrusion 43, and offsets the stress generated in this movement.

[0023] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A novel plastic stop block, comprising a plastic stop block (4), characterized in that: The plastic block (4) is provided with a roller (3) inside, and a piston assembly (2) is provided on the outside of the plastic block (4). A rotor assembly (1) is provided on the outside of the piston assembly (2). The plastic block (4) is composed of a plastic block body (41), a reinforcing protruding step edge (42), and an edge protrusion (43). The base of the plastic block body (41) is circular and its size is adapted to the shape of the roller (3). The edge protrusion (43) is located on the outer edge of the plastic block body (41) and is semi-circular, used to enclose and restrict the swing of the roller (3). The reinforcing protruding step edge (42) is located on the inner side of the edge protrusion (43).

2. The novel plastic stop block according to claim 1, characterized in that: The plastic block body (41), edge protrusion (43), and reinforced protruding step edge (42) are integrally formed structures.

3. The novel plastic stop block according to claim 1, characterized in that: The cross section of the reinforced protruding step edge (42) is a right trapezoid and its inclined surface faces the central axis of the plastic block body (41).

4. A novel plastic stop block according to claim 1, characterized in that: The width of the reinforced protruding step edge (42) gradually increases along the radial direction of the plastic block body (41) to form a gradient support structure.

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