Improved roller bearing for hydraulic motor

Abstract

The utility model discloses an improved roller bearing for a hydraulic motor, and aims to improve the durability of the roller bearing. The roller bearing comprises a crankshaft, a crankshaft sleeve and a plurality of pin rollers, the pin rollers are arranged between the crankshaft sleeve and the crankshaft, an annular blocking piece is arranged between every two adjacent pin rollers, and the blocking pieces are fixedly connected to the crankshaft sleeve or the crankshaft. The separation blades are arranged to separate the rollers independently, so that dislocation and abrasion of the rollers can be effectively reduced, the durability of the roller bearing is improved, and the service life of the roller bearing is prolonged; and meanwhile, the number of the pin rollers can be reduced under the same bearing width, so that the material cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic motors, and particularly to an improved roller bearing for a hydraulic motor, aiming to reduce the misalignment and wear of rollers during high-speed rotation through design optimization, and at the same time improve the lubrication effect of the roller bearing. Background Art

[0002] A hydraulic motor is a device that converts hydraulic energy into mechanical energy. As an important component in a hydraulic system, its performance directly affects the efficiency and reliability of the entire system. The working principle of a hydraulic motor is similar to that of a hydraulic cylinder, but the difference is that a hydraulic motor converts pressure energy into rotational motion instead of linear motion. The specific working principle is as follows: 1. Hydraulic oil enters: The hydraulic oil enters the cylinder of the hydraulic motor through a control valve. 2. Pressure difference drive: A pressure difference is formed on both sides of the cylinder, and this pressure difference drives the rotor or plunger of the motor to start rotating. 3. Energy conversion: The rotational motion is transmitted to the required device or machine through a drive shaft, thus realizing the conversion of hydraulic energy into mechanical energy. The working principle of the hydraulic motor enables it to produce high torque and high-speed output, so it is widely used in applications that require a large amount of power and continuous rotational motion.

[0003] As a key connecting component in a hydraulic motor, a roller bearing is used to fix the connecting rod on the crankshaft, enabling the connecting rod to rotate following the crankshaft, and playing an important role in fixing, sealing, and transmitting torque. In the design of traditional roller bearings for hydraulic motors, due to the lack of effective spacing and support between adjacent rollers, misalignment is likely to occur during high-speed rotation, resulting in increased wear, affecting the service life of the roller bearing and the overall performance of the hydraulic motor. In addition, traditional lubrication methods for roller bearings often have problems such as uneven lubrication and insufficient oil supply, further exacerbating the wear of the rollers. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides an improved roller bearing for a hydraulic motor. By designing an annular retaining ring to space the rollers, misalignment of the rollers is effectively avoided, wear is reduced, and by optimizing the oil passage design on the crankshaft sleeve and the crankshaft, the lubrication effect of the roller bearing is improved.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] An improved roller bearing for a hydraulic motor, comprising a crankshaft, a crankshaft sleeve, and a plurality of rollers, the rollers being arranged between the eccentric part of the crankshaft and the crankshaft sleeve; the roller bearing further comprises a plurality of annular retaining rings, one of the retaining rings being provided between adjacent rollers, the retaining ring being fixedly connected to the crankshaft sleeve or the eccentric part of the crankshaft for spacing adjacent rollers apart.

[0007] In order to improve the service life of the retaining piece, the retaining piece is made of wear-resistant and high-strength alloy material.

[0008] In order to lubricate the rollers, a first oil passage and a second oil passage are respectively arranged axially and radially along the crankshaft. The first oil passage communicates with the roller bearing through the second oil passage for introducing oil into the roller bearing for lubrication. A plurality of the second oil passages extend radially and uniformly along the crankshaft to form a lubricating layer on the contact surface with the rollers. The first oil passage extends axially along the crankshaft and leads out from one end of the crankshaft.

[0009] In order to reduce the processing cost of the roller bearing, the rollers of the roller bearing are made by reforming on the basis of the existing roller bearing, and the thickness d1 of the retaining piece + the width d2 of the roller ≤ the thickness d of the original roller.

[0010] In order to achieve uniform lubrication, a plurality of the second oil passages are arranged at equal intervals along the width direction of the roller bearing.

[0011] Furthermore, a boss is arranged on one side of the crankshaft sleeve facing the roller bearing. A lubricating cavity is formed between the boss and the crankshaft, and the boss is arranged at the middle position of the crankshaft sleeve.

[0012] In order to improve the service performance of the retaining piece, the surface of the retaining piece is subjected to carburizing, nitriding or surface quenching treatment to improve its hardness and wear resistance.

[0013] Furthermore, the retaining piece is connected to the crankshaft sleeve or the crankshaft through an elastic connecting piece to allow the retaining piece to have a certain elastic deformation when the roller rotates, further reducing friction and wear.

[0014] Furthermore, the cross-sectional shape of the first oil passage and / or the second oil passage is oval or rectangular to increase the contact area between the oil and the contact surface of the roller and improve the lubrication effect.

[0015] Furthermore: an oil distribution groove is also arranged on the crankshaft for uniformly distributing the oil introduced from the oil inlet hole into each second oil passage to ensure the uniformity of lubrication.

[0016] The beneficial effects of the present invention are:

[0017] 1. By designing an annular retaining piece to separate each roller, the dislocation and wear of the rollers during high-speed rotation are effectively avoided, and the service life of the roller bearing and the overall performance of the hydraulic motor are improved;

[0018] 2. By optimizing the oil passage design on the crankshaft sleeve and the crankshaft, uniform lubrication of the roller bearing is achieved, and the service life of the roller bearing is further extended. Description of the Drawings

[0019] Figure 1 According to some embodiments of the present application, a schematic installation structure diagram of the roller bearing is shown;

[0020] Figure 2 According to some embodiments of the present application, Figure 1 a cross-sectional view taken along line A-A in

[0021] Figure 3 According to some embodiments of the present application, Figure 1 a partial enlarged view of part B in Detailed Description of the Embodiments

[0022] The technical features and advantages of the present application will be described in more detail below in conjunction with the accompanying drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, thereby making the scope of protection of the present invention more clearly defined.

[0023] It should be noted that in the description of the present application, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0024] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the importance of the indicated technical features.

[0025] In addition, it should be noted that in the description of the present application, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" 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, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Embodiment 1

[0026] As Figures 1-3 shown, this embodiment provides an improved roller bearing for a hydraulic motor, including a crankshaft 1, a crankshaft sleeve 2, and a plurality of rollers 3. The rollers 3 are arranged between the crankshaft 1 and the crankshaft sleeve 2 to support the crankshaft 1 and allow it to rotate relative to each other.

[0027] The roller bearing further includes a plurality of annular retaining plates 4. A retaining plate 4 is arranged between two adjacent rollers 3. The retaining plate 4 is fixedly connected to the inner wall of the crankshaft sleeve 2 and can be installed on the crankshaft sleeve 2 by interference fit. The retaining plate 4 is made of wear-resistant and high-strength materials, such as stainless steel, to improve the durability and load-bearing capacity of the retaining plate. The shape of the retaining plate 4 is a flat ring, and its size is precisely calculated to ensure a reasonable gap between the retaining plate 4 and the rollers 3. By arranging the retaining plate 4, each roller 3 is independently spaced apart, which can effectively prevent the misalignment and wear of the rollers 3 and avoid excessive resistance to the normal rotation of the rollers 3.

[0028] In order to lubricate the rollers 3 and the retaining plates 4 and reduce material wear, a lubrication system is designed on the crankshaft 1. Specifically, an oil inlet hole 5 is opened on the crankshaft 1, and a first oil passage 6 and a second oil passage 7 are respectively opened along the radial and axial directions. The oil inlet hole 5 is communicated with the second oil passage 7 through the first oil passage 6 for introducing external oil into the roller bearing for lubrication. The second oil passage 7 extends along the radial direction of the crankshaft 1 and forms a lubricating layer with the contact surface of the rollers 3 to reduce the friction and wear between the rollers 3 and the crankshaft 1. In order to achieve uniform lubrication, a plurality of second oil passages 7 can be evenly spaced along the width direction of the bearing to uniformly lubricate each roller 3.

[0029] During use, external oil enters the crankshaft 1 through the oil inlet hole 5 and is evenly distributed to the contact surfaces of the rollers 3 through the first oil passage 6 and the second oil passage 7 to achieve the lubrication of the roller bearing and ensure that the roller bearing always maintains a good lubrication state.

[0030] To further enhance lubrication, a convex platform 201 is designed on one side of the middle part of the crankshaft sleeve 2 facing the crankshaft 1. A plurality of rollers 3 are symmetrically arranged on both sides of the convex platform 201, and a lubrication cavity 8 for the lubricating liquid to pass through is formed between the convex platform 201 and the crankshaft 1. Embodiment 2

[0031] This embodiment is basically the same as Embodiment 1, except for the material and manufacturing process of the retaining plate 4. In this embodiment, the retaining plate 4 is manufactured by powder metallurgy process to improve the precision and durability of the retaining plate. At the same time, the surface of the retaining plate 4 is carburized to improve its hardness and wear resistance. Embodiment 3

[0032] This embodiment is basically the same as Embodiment 1, except for the shape and installation method of the retaining plate. In this embodiment, the retaining plate 4 is connected to the crankshaft sleeve 2 through an elastic connecting piece (such as a spring piece). Specifically, a retaining plate groove 401 is opened on the crankshaft sleeve 2, and the end of the retaining plate 4 is clamped into the above-mentioned retaining plate groove 401, and elastic thin sheets are arranged on both sides of the retaining plate 4 to allow the retaining plate 4 to have a certain elastic deformation when the rollers 3 rotate, further reducing friction and wear. Embodiment 4

[0033] This embodiment is basically the same as Embodiment 1, except for the optimization of the oil passage design. In this embodiment, the cross-sectional shape of the first oil passage 6 is oval to increase the contact area between the oil and the contact surface of the roller 3 and improve the lubrication effect. At the same time, an oil distribution groove (not shown) is also provided on the crankshaft 1 for evenly distributing the oil introduced through the oil inlet hole 5 into each first oil passage 6 to ensure the uniformity of lubrication. Embodiment 5

[0034] This embodiment is basically the same as Embodiment 1, except for the intelligence of the lubrication system. In this embodiment, it further includes an oil pressure sensor (not shown) and a control system (not shown). The oil pressure sensor is used to monitor the pressure and flow rate of the oil in real time, and the control system automatically adjusts the opening degree of the oil inlet hole 5 or the supply amount of the oil according to the monitoring results to ensure that the roller bearing always maintains a good lubrication state. Embodiment 6

[0035] This embodiment is basically the same as Embodiment 1, except for the maintenance of the roller bearing. In this embodiment, a detachable maintenance cover (not shown) is provided on the crankshaft sleeve 2 for conveniently checking and replacing the retaining piece 4 or performing other maintenance work.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features, and these modifications or replacements 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 the present invention.

[0037] In the description of this specification, the description with reference to terms such as "some embodiments", "some examples", "exemplarily", "examples", "preferably", or "further" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. An improved roller bearing for a hydraulic motor, comprising a crankshaft (1), a crankshaft sleeve (2) and a plurality of rollers (3), the rollers (3) being arranged between an eccentric portion of the crankshaft (1) and the crankshaft sleeve (2), characterized in that: It also includes a plurality of annular retaining plates (4), one of the retaining plates (4) is arranged between two adjacent rollers (3), and the retaining plate (4) is fixedly connected to the eccentric part of the crankshaft sleeve (2) or the crankshaft (1) for spacing apart the adjacent rollers (3).

2. The improved roller bearing according to claim 1, characterized in that: The retaining plate (4) is made of a wear-resistant and high-strength alloy material.

3. The improved roller bearing according to claim 1, characterized in that: The crankshaft (1) is provided with a first oil passage (6) and a second oil passage (7) axially and radially respectively. The first oil passage (6) communicates with the roller bearing through the second oil passage (7) for introducing oil into the roller bearing for lubrication. A plurality of the second oil passages (7) extend radially and uniformly along the crankshaft (1) to form a lubricating layer on the contact surface with the roller (3). The first oil passage (6) extends axially along the crankshaft (1) and exits from one end of the crankshaft (1).

4. The improved roller bearing according to claim 3, characterized in that: The roller (3) of the roller bearing is made by reforming on the basis of the existing roller bearing, and the thickness d1 of the retaining plate (4)+ the width d2 of the roller (3) ≤ the thickness d of the original roller.

5. The improved roller bearing according to claim 3, characterized in that: A plurality of the second oil passages (7) are arranged at equal intervals along the width direction of the roller bearing.

6. The improved roller bearing according to claim 3, characterized in that, A boss (201) is provided on one side of the crankshaft sleeve (2) facing the crankshaft (1). A lubricating cavity (8) is formed between the boss (201) and the crankshaft (1). The boss (201) is arranged at the middle position of the crankshaft sleeve (2), and a plurality of the rollers (3) are symmetrically arranged on both sides of the boss (201).

7. The improved roller bearing according to claim 3, characterized in that, The surface of the retaining plate (4) is subjected to carburizing, nitriding or surface quenching treatment to improve its hardness and wear resistance.

8. The improved roller bearing according to claim 1, characterized in that: The retaining plate (4) is connected to the crankshaft sleeve (2) or the crankshaft (1) through an elastic connecting piece to allow the retaining plate (4) to have a certain elastic deformation when the roller (3) rotates, further reducing friction and wear.

9. The improved roller bearing according to claim 3, characterized in that: The cross-sectional shape of the first oil passage (6) and / or the second oil passage (7) is oval or rectangular to increase the contact area between the oil and the contact surface of the roller (3) and improve the lubrication effect.

10. The improved roller bearing according to claim 3, characterized in that: An oil distribution groove is also provided on the crankshaft (1) for evenly distributing the oil introduced through the oil inlet hole (5) into each second oil passage (7) to ensure the uniformity of lubrication.

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