Plunger roller assembly

Abstract

The utility model relates to a plunger roller assembly which comprises a roller formed by folding a first cylinder and a second cylinder and two supporting rings matched with the roller, and the two supporting rings are the first supporting ring and the second supporting ring respectively. The first cylinder and the second cylinder are arranged in a mirror symmetry mode, a first annular cavity with a certain length is formed in the first cylinder from right to left in the axial direction of the first cylinder, and a first annular step used for installing a first supporting ring is arranged in the first annular cavity; a second annular cavity is formed in the position, corresponding to the first annular cavity, in the second cylinder, and a second annular step used for installing a second supporting ring is arranged in the second annular cavity. The supporting ring is in a circular ring shape, a first lightening hole is formed in the middle of the supporting ring, the edge of the first lightening hole is connected with the first annular step or the second annular step in a clamped mode, and a plurality of second lightening holes are formed in the circumferential direction of the supporting ring at equal intervals. According to the utility model, the rigidity and strength can be ensured on the premise of realizing light weight.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic transmission, in particular to a plunger roller assembly. Background Art

[0002] The inner curve hydraulic motor is a common hydraulic transmission component, which consists of a housing, a rotor, an end cover, a bearing, a seal, a plunger body, a plunger roller and an inner curve stator guide rail. The inner curve hydraulic motor is widely used in actuators such as mining machinery, engineering machinery, ship deck machinery, and cranes due to its simple structure, large power-to-weight ratio, stable torque, wide speed range, strong load capacity, good sealing, large output torque and low speed. At present, the inner curve hydraulic motor is developing towards lightweight, high strength, high life, high performance, high efficiency and high maneuverability. Among them, the plunger roller is the key moving part of the inner curve hydraulic motor. The plunger roller is installed on the plunger body. Under the action of high-pressure oil, the plunger roller contacts the inner curve stator guide rail, generating a contact reaction force to drive the plunger roller to roll, thereby outputting torque through the plunger body. However, in the current technical solution, the plunger roller is mostly made of solid metal materials, which cannot have a certain rigidity while ensuring weight reduction.

[0003] Therefore, it is necessary to provide a new plunger roller assembly. Utility Model Content

[0004] The utility model aims to provide a plunger roller assembly which can ensure rigidity while achieving lightness.

[0005] The utility model discloses a plunger roller assembly, comprising a roller formed by a first cylinder and a second cylinder, and two support rings matched with the roller, wherein the two support rings are respectively a first support ring and a second support ring;

[0006] The first cylinder and the second cylinder are arranged in mirror symmetry, a first annular cavity of a certain length is arranged in the first cylinder from right to left along its axial direction, a first annular step for installing a first support ring is arranged in the first annular cavity; a second annular cavity is arranged in the second cylinder at a position corresponding to the first annular cavity, a second annular step for installing a second support ring is arranged in the second annular cavity;

[0007] The support ring is in an annular shape, with a first weight-reducing hole in the middle thereof, the edge of the first weight-reducing hole being engaged with the first annular step or the second annular step, and a plurality of second weight-reducing holes being arranged at equal distances in the circumferential direction of the support ring.

[0008] Furthermore, two ends of the roller are respectively provided with avoidance cavities.

[0009] Furthermore, the first annular cavity is communicated with the second annular cavity.

[0010] Furthermore, the contacting parts of the roller and the supporting ring are bonded together by heating and melting.

[0011] Furthermore, the outer surface of the roller is provided with a silver coating.

[0012] Furthermore, the support ring is made of carbon fiber reinforced composite material.

[0013] Furthermore, the first cylinder and the second cylinder are fixedly connected by welding to form a roller.

[0014] Beneficial effects of the utility model:

[0015] In the plunger roller assembly of the utility model, the first cylinder and the second cylinder are provided with a connected cavity in mirror symmetry, so the weight can be reduced to a certain extent. However, when the roller is subjected to force during movement, the deformation will increase. A support ring is provided inside the cavity to prevent excessive deformation, thereby achieving a certain weight reduction and ensuring rigidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional view of the plunger roller assembly of this embodiment;

[0017] Figure 2 This is a schematic diagram of the structure of the support ring of this embodiment;

[0018] Figure 3 It is a side view of the plunger roller assembly of this embodiment.

[0019] Description of reference numerals: 1-first cylinder, 2-second cylinder, 3-support ring, 4-avoidance cavity;

[0020] 11-first annular cavity, 111-first annular step;

[0021] 21-second annular cavity, 211-second annular step;

[0022] 31 - first support ring, 32 - second support ring, 33 - first weight-reducing hole, 34 - second weight-reducing hole. DETAILED DESCRIPTION

[0023] The following will describe the implementation of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0025] like Figures 1 to 3 As shown, in this embodiment, a plunger roller assembly includes a roller formed by a first cylinder 1 and a second cylinder 2, and two support rings 3 matched with the roller. The two support rings 3 are a first support ring 31 and a second support ring 32 respectively.

[0026] The first cylinder 1 and the second cylinder 2 are arranged in mirror symmetry, and a first annular cavity 11 of a certain length is arranged in the first cylinder 1 from right to left along its axial direction, and a first annular step 111 for installing a first support ring 31 is arranged in the first annular cavity 11. A second annular cavity 21 is arranged at a position corresponding to the first annular cavity 11 in the second cylinder 2, and a second annular step 211 for installing a second support ring 32 is arranged in the second annular cavity 21. Thus, the utility model can also have a certain rigidity under the premise of ensuring weight reduction. If the number of annular cavities is set to be more, the manufacturing difficulty will be increased.

[0027] The support ring 3 is annular, and a first weight-reducing hole 33 is provided in the middle thereof. The edge of the first weight-reducing hole 33 is engaged with the first annular step 111 or the second annular step 211, and a plurality of second weight-reducing holes 34 are provided at equal distances in the circumferential direction of the support ring 3. In this embodiment, the number of the second weight-reducing holes 34 is nine.

[0028] In summary, in order to achieve the purpose of having a certain rigidity while being lightweight, the first cylinder 1 and the second cylinder 2 are provided with a connected cavity in mirror symmetry, so that a certain weight can be reduced. However, when the roller is subjected to force during movement, the deformation will increase, so a support ring 2 is provided inside the cavity to prevent excessive deformation, thereby achieving a certain weight reduction and ensuring rigidity.

[0029] As a specific implementation of this embodiment, both ends of the roller are provided with avoidance cavities 4. The purpose is to reduce the contact area between the plunger roller assembly and the inner curve stator guide rail during movement, so as to reduce friction.

[0030] As a specific implementation of this embodiment, the first annular cavity 11 is communicated with the second annular cavity 21 .

[0031] As a specific implementation of this embodiment, the contact area between the roller and the support ring 3 is bonded together by heating and melting.

[0032] As a specific implementation of this embodiment, the outer surface of the roller is provided with a silver coating. First, the provision of the silver coating can protect the roller from corrosion and oxidation, thereby improving its durability and stability. Secondly, the silver coating can enhance the solderability of the surface, making welding easier and more reliable. Then, the silver coating has a bright appearance, which can add beauty to the product and improve the market competitiveness of the product. Finally, silver has good thermal conductivity and good anti-bite ability, which can reduce the friction loss of the plunger roller, inhibit the heat accumulation of the plunger roller friction pair, and improve the life and mechanical efficiency of the plunger roller.

[0033] As a specific implementation of this embodiment, the support ring 2 is made of carbon fiber reinforced composite material. First, the strength of carbon fiber composite material is 5 times that of steel, so it can provide good support. Secondly, the specific gravity of carbon fiber composite material is smaller than that of steel, which can greatly reduce the weight of the support ring and facilitate installation and maintenance. Then, carbon fiber composite material has good corrosion resistance and radiation resistance, and can be used for a long time in harsh environments. Finally, carbon fiber composite material is easy to process and manufacture, and can be made into support rings of various shapes and sizes to meet different needs.

[0034] As a specific implementation of this embodiment, the first cylinder 1 and the second cylinder 2 are fixedly connected by welding to form a roller. Specifically, the first cylinder 1 and the second cylinder 2 are fixedly connected by friction welding to form a roller. Firstly, the stability and load-bearing capacity of the overall structure between the rollers can be improved. Secondly, friction welding does not require the use of welding materials, which can avoid problems such as pores, slag inclusions and cracks caused by improper welding materials or poor welding processes. Then, friction welding has a high welding speed, which can realize automated production and improve production efficiency. Finally, the friction welding workplace is free of sparks, arcs and harmful gases, and is an environmentally friendly welding method.

[0035] It should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various utility model aspects, in the above description of the exemplary embodiments of the utility model, the various features of the utility model are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the following intention: the claimed utility model requires more features than the features explicitly recited in each claim. More specifically, as reflected in the above claims, the utility model aspects are less than all the features of the single embodiment disclosed above. Therefore, the claims following the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the utility model.

[0036] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and to form different embodiments. It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation to the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names.

Claims

1. A plunger roller assembly, characterized in that: It comprises a roller formed by a first cylinder (1) and a second cylinder (2) matched together, and two support rings (3) matched with the roller, the two support rings (3) being respectively a first support ring (31) and a second support ring (32); The first cylinder (1) and the second cylinder (2) are arranged in mirror symmetry; a first annular cavity (11) of a certain length is provided in the first cylinder (1) from right to left along its axial direction; a first annular step (111) for mounting a first support ring (31) is provided in the first annular cavity (11); a second annular cavity (21) is provided in the second cylinder (2) at a position corresponding to the first annular cavity (11); a second annular step (211) for mounting a second support ring (32) is provided in the second annular cavity (21); The support ring (3) is in the shape of a ring, with a first weight-reducing hole (33) provided in the middle thereof, the edge of the first weight-reducing hole (33) being engaged with the first annular step (111) or the second annular step (211), and a plurality of second weight-reducing holes (34) being arranged at equal distances in the circumferential direction of the support ring (3).

2. The plunger roller assembly according to claim 1, characterized in that: Both ends of the roller are respectively provided with avoidance cavities (4).

3. The plunger roller assembly according to claim 1 or 2, characterized in that: The first annular cavity (11) is communicated with the second annular cavity (21).

4. The plunger roller assembly according to claim 1, characterized in that: The contact area between the roller and the support ring (3) is bonded together by heating and melting.

5. The plunger roller assembly according to claim 1, characterized in that: The outer surface of the roller is provided with a silver coating.

6. The plunger roller assembly according to claim 1, characterized in that: The support ring (3) is made of carbon fiber reinforced composite material.

7. The plunger roller assembly according to claim 1, characterized in that: The first cylinder (1) and the second cylinder (2) are fixedly connected by welding to form a roller.

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