Transmission mechanism and radial plunger pump

Abstract

The utility model discloses a transmission mechanism and a radial plunger pump, the transmission mechanism comprises a planetary driving wheel, a bearing and a resonance cam, and the bearing is respectively connected with the resonance cam and the planetary driving wheel; the resonance cam comprises a cam body and a rotating wheel, the cam body rotates around the center axis of the rotating wheel, the cam body and the rotating wheel are internally tangent, and the bearing is connected with the cam body in a sleeved mode. The bearing is arranged between the planetary driving wheel and the resonance cam, a cam on the resonance cam rotates around the rotating wheel, so that the planetary driving wheel is driven to rotate around a center shaft of the rotating wheel, the planetary driving wheel is driven by the resonance cam, and the planetary driving wheel rotates relative to the resonance cam; the inner ring of the bearing rotates relative to the outer ring, friction between the planetary gear and the resonance cam is converted into rolling friction with smaller loss, and the service life of the device is prolonged. The radial plunger pump comprises the transmission mechanism.

Description

Technical Field

[0001] The present application relates to the technical field of plunger pumps, and in particular to a transmission mechanism and a radial piston pump. Background Art

[0002] The plunger hydraulic pump is a positive displacement hydraulic pump. Through the repeated movement of the plunger in the cylinder hole, the capacity of the plunger cylinder is changed, low-pressure liquid is sucked into the cylinder body, and high-pressure liquid is output by pressing into the system. The plunger pump is widely used in the hydraulic system of engineering machinery due to its high working output pressure, high efficiency, high power, convenient variable, and strong and durable. According to the different arrangements of the plunger in the cylinder hole, the plunger pump can be divided into radial plunger pump head and axial plunger pump.

[0003] The current plunger pump uses a motor to drive the planetary gear to operate, thereby driving the connecting rod connected to the piston on the planetary gear to move. During operation, sliding friction occurs between the planetary gear and other mechanisms, causing wear of the mechanism and reducing its service life. Utility Model Content

[0004] The technical problem to be solved by the present application is that the current plunger pump uses a motor to drive the planetary gear to operate, thereby driving the connecting rod connected to the piston on the planetary gear to move. During operation, sliding friction will occur between the planetary gear and other mechanisms, causing wear of the mechanism and reducing its service life.

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a transmission mechanism and a radial piston pump.

[0006] In a first aspect, the utility model discloses a transmission mechanism, which includes a planetary drive wheel, a bearing, and a resonance cam, wherein the bearing is respectively connected to the resonance cam and the planetary drive wheel;

[0007] The resonance cam comprises a cam and a rotating wheel. The cam rotates around the central axis of the rotating wheel. The cam is inscribed in the rotating wheel. The bearing is sleeved with the cam.

[0008] Preferably, it comprises a driving rod, one end of which is connected to the planetary driving wheel, and the other end of which is connected to a piston.

[0009] Preferably, the planetary drive wheel comprises a mounting post, the mounting post is arranged around the edge of the planetary drive wheel, and the mounting post is connected to the drive rod.

[0010] Preferably, the mounting columns are evenly arranged on the planetary drive wheels.

[0011] Preferably, the driving rod comprises a collar portion, a rod-shaped portion, and a spherical portion;

[0012] The collar portion, the rod-shaped portion and the spherical portion are connected in sequence, and the collar portion, the rod-shaped portion and the spherical portion are integrally formed.

[0013] Preferably, the rod-shaped portion is in a curved or straight rod shape.

[0014] Preferably, the ferrule portion is sleeved with the mounting column.

[0015] Preferably, the outer diameter of the cam is smaller than or equal to the radius of the rotating wheel.

[0016] Preferably, the rotating wheel defines a first rotating hole, the cam defines a second rotating hole, the first rotating hole is connected to the second rotating hole, and the second rotating hole is arranged close to the edge of the cam.

[0017] In a second aspect, the utility model discloses a radial piston pump, which comprises the above-mentioned transmission mechanism.

[0018] The above technical solution provided by this application has the following advantages compared with the prior art:

[0019] The transmission mechanism and radial piston pump provided by the present application, in the transmission mechanism, the bearing is arranged between the planetary drive wheel and the resonance cam, the cam on the resonance cam rotates around the rotating wheel, thereby driving the planetary drive wheel to rotate around the central axis of the rotating wheel, so that the planetary drive wheel is driven by the resonance cam, and the planetary drive wheel rotates relative to the resonance cam, and a rolling element is arranged on the bearing, so that the inner ring of the bearing rotates relative to the outer ring, and the friction between the planetary gear and the resonance cam is converted into rolling friction with less loss, thereby extending the service life of the device. In the radial piston pump, the driving mechanism drives the transmission mechanism to operate, thereby driving the piston in the piston cylinder to reciprocate, thereby changing the pressure of the liquid output and obtaining a high-pressure output liquid, and the bearing is used between the planetary gear and the resonance cam in the transmission mechanism, which can reduce the friction between the mechanisms, thereby reducing the wear of the mechanism and extending the service life of the pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 A schematic diagram of the structure of a transmission mechanism provided in this application;

[0023] Figure 2 A schematic diagram of the exploded structure of a transmission mechanism provided in this application;

[0024] Figure 3 A schematic diagram of the structure of a resonant cam of a transmission mechanism provided in the present application;

[0025] Figure 4 A schematic diagram of the structure of a radial piston pump provided in this application.

[0026] Description of reference numerals:

[0027] 100. Radial piston pump; 2. Driving mechanism; 3. Piston cylinder;

[0028] 1. Transmission mechanism;

[0029] 11. Planetary drive wheel; 111. Mounting column;

[0030] 12. Bearings;

[0031] 13. Resonance cam; 131. Cam; 1311. Second rotating hole; 132. Rotating wheel; 1321. First rotating hole;

[0032] 14. driving rod; 141. collar portion; 142. rod-shaped portion; 143. spherical portion. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0034] First, see Figure 1-3 The utility model discloses a transmission mechanism 1, which can drive the piston or plunger of a plunger pump to move. The transmission mechanism 1 includes a planetary driving wheel 11, a bearing 12, a resonance cam 13, and a driving rod 14. The bearing 12 is respectively connected to the resonance cam 13 and the planetary driving wheel 11, and the planetary driving wheel 11 is connected to the driving rod 14.

[0035] Specifically, the resonant cam 13 is connected to the driving mechanism 2, and the driving force is transmitted to the bearing 12 and the planetary driving wheel 11. The planetary driving wheel 11 drives the driving rod 14 to move. The number of driving rods 14 matches the number of piston cylinders 3 set in the connected radial pump. One end of the driving rod 14 is connected to the planetary driving wheel 11, and the other end of the driving rod 14 is connected to the piston. The outer ring of the bearing 12 is connected to the planetary driving wheel 11, and the inner ring is connected to the resonant cam 13. The planetary driving wheel 11 and the outer ring of the bearing 12 are interference fit, and the resonant cam 13 and the inner ring of the bearing 12 are interference fit.

[0036] The resonance cam 13 includes a cam 131 and a rotating wheel 132 . The cam 131 is connected to the rotating wheel 132 . The cam 131 rotates around the central axis of the rotating wheel 132 . The cam 131 is inscribed in the rotating wheel 132 . The bearing 12 is sleeved with the cam 131 .

[0037] Specifically, the rotating wheel 132 defines a first rotating hole 1321, and the cam 131 defines a second rotating hole 1311. The first rotating hole 1321 is connected to the second rotating hole 1311, and the second rotating hole 1311 is arranged close to the edge of the cam 131, that is, the second rotating hole 1311 is not colinear with the central axis of the cam 131, and the outer diameter of the cam 131 is less than or equal to the radius of the rotating wheel 132. The first rotating hole 1321 of the rotating wheel 132 is connected to the output shaft of the driving mechanism 2 as the central axis of rotation. When rotating, the rotating wheel 132 rotates around the first rotating hole 1321, and the cam 131 also rotates around the first rotating hole 1321, so that the planetary driving wheel 11 installed on the cam 131 also rotates around the first rotating hole 1321.

[0038] It can be understood that the bearing 12 is arranged between the planetary drive wheel 11 and the resonance cam 13, and the cam 131 on the resonance cam 13 rotates around the rotating wheel 132, thereby driving the planetary drive wheel 11 to rotate around the central axis of the rotating wheel 132, so that the planetary drive wheel is driven by the resonance cam 13, and the planetary drive wheel 11 rotates relative to the resonance cam 13. Rolling elements are arranged on the bearing 12, so that the inner ring of the bearing 12 rotates relative to the outer ring, and the friction between the planetary gear and the resonance cam 13 is converted into rolling friction with less loss, thereby extending the service life of the device.

[0039] In particular, the cam 131 and the rotating wheel 132 are integrally formed, which reduces the installation structure between the cam 131 and the rotating wheel 132. The cam 131 and the rotating wheel 132 are fixedly arranged and can move synchronously without friction between the mechanisms, thereby avoiding the generation of noise.

[0040] The planetary driving wheel 11 includes a mounting post 111 . The mounting post 111 is disposed around an edge of the planetary driving wheel 11 . The mounting post 111 is connected to the driving rod 14 .

[0041] Specifically, the mounting columns 111 are evenly arranged on the planetary drive wheel 11. The side of the planetary drive wheel 11 close to the cam 131 is set in a bowl shape to facilitate buckling on the cam 131. The mounting columns 111 are evenly distributed along the circumference of the planetary drive wheel 11. The number of mounting columns 111 corresponds to the driving rod 14. When the planetary drive wheel 11 rotates around the second rotating hole 1311, the mounting columns 111 also rotate with the planetary drive wheel 11, so that the driving rod 14 drives the piston to extend or enter the piston cylinder 3.

[0042] The driving rod 14 includes a ring portion 141, a rod-shaped portion 142, and a spherical portion 143. The ring portion 141, the rod-shaped portion 142 and the spherical portion 143 are connected in sequence. The ring portion 141, the rod-shaped portion 142 and the spherical portion 143 are integrally formed. The ring portion 141 is socketed with the mounting column 111, and the spherical portion 143 is inserted into the piston, thereby driving the piston to move.

[0043] Specifically, the spherical portion 143 is used at the location where the drive rod 14 connects to the piston, which allows the drive rod 14 to move more flexibly relative to the piston, thereby preventing the drive rod 14 from jumping in the vertical direction during movement, reducing noise, and extending the service life of the mechanism.

[0044] Optionally, the rod-shaped portion 142 is in a curved or straight rod shape.

[0045] As an embodiment, a bearing 12 is arranged between the driving rod 14 and the mounting column 111, the sleeve portion of the driving rod 14 is interference fit with the outer ring of the bearing 12, and the mounting column 111 is interference fit with the inner ring of the bearing 12. The driving rod 14 is rotated on the mounting column 111 through the bearing 12, thereby avoiding sliding friction between the driving rod 14 and the mounting column 111, reducing the east-west friction loss between the driving rod 14 and the mounting column 111, and extending the service life of the transmission mechanism 1.

[0046] Second, see Figure 4 The utility model discloses a radial piston pump 100, which includes the above-mentioned transmission mechanism 1, drive mechanism 2 and piston cylinder 3, wherein the transmission mechanism 1 and piston cylinder 3 are arranged in a shell, the drive mechanism 2 installation column 111 is outside the shell and penetrates the shell, the transmission mechanism 1 is respectively connected to the drive mechanism 2 and the piston cylinder 3, the drive mechanism 2 includes a drive motor for providing a driving force for the pump body, the liquid is pressurized in the piston cylinder 3, a piston or a plunger is arranged in the piston cylinder 3, the transmission mechanism 1 transmits the driving force generated by the drive mechanism 2 to the piston cylinder 3, and the piston in the piston cylinder 3 reciprocates to pressurize the liquid in the cylinder, thereby outputting high-pressure liquid.

[0047] It can be understood that the driving mechanism 2 drives the transmission mechanism 1 to operate, thereby driving the piston in the piston cylinder 3 to reciprocate, thereby changing the pressure of the liquid output and obtaining a high-pressure output liquid. The bearing 12 is used between the planetary gear and the resonance cam 13 in the transmission mechanism 1, which can reduce the friction between the mechanisms, thereby reducing the wear of the mechanisms and extending the service life of the pump body.

[0048] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between 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.

[0052] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0054] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0055] The above is a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A transmission mechanism, characterized in that: It includes a planetary driving wheel, a bearing, and a resonance cam, wherein the bearing is respectively connected to the resonance cam and the planetary driving wheel; The resonance cam comprises a cam and a rotating wheel. The cam rotates around the central axis of the rotating wheel. The cam is inscribed in the rotating wheel. The bearing is sleeved with the cam.

2. The transmission mechanism according to claim 1, characterized in that: It comprises a driving rod, one end of which is connected to the planetary driving wheel, and the other end of which is connected to a piston.

3. The transmission mechanism according to claim 2, characterized in that: The planetary drive wheel comprises a mounting post, which is arranged around the edge of the planetary drive wheel and is connected to the drive rod.

4. The transmission mechanism according to claim 3, characterized in that: The mounting columns are evenly arranged on the planetary drive wheels.

5. The transmission mechanism according to claim 2, characterized in that: The driving rod comprises a collar portion, a rod-shaped portion, and a spherical portion; The collar portion, the rod-shaped portion and the spherical portion are connected in sequence, and the collar portion, the rod-shaped portion and the spherical portion are integrally formed.

6. The transmission mechanism according to claim 5, characterized in that: The rod-shaped portion is in a curved or straight rod shape.

7. The transmission mechanism according to claim 5, characterized in that: The ferrule portion is sleeved with the mounting column.

8. The transmission mechanism according to claim 1, characterized in that: The outer diameter of the cam is smaller than or equal to the radius of the rotating wheel.

9. The transmission mechanism according to claim 1, characterized in that: The rotating wheel defines a first rotating hole, the cam defines a second rotating hole, the first rotating hole is connected to the second rotating hole, and the second rotating hole is arranged close to the edge of the cam.

10. A radial piston pump, characterized in that: It comprises the transmission mechanism described in any one of claims 1 to 9 above.

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