Transmission mechanism and radial plunger pump

Abstract

The utility model discloses a transmission mechanism and a radial plunger pump, the transmission mechanism comprises a worm, a transmission piece, a transmission rod and a rotating shaft, the transmission piece is connected with the rotating shaft, and the rotating piece rotates by taking the rotating shaft as a central shaft; the transmission part is divided into an eccentric rotating part and a transmission gear, the eccentric rotating part is installed on the surface of one side of the transmission gear and connected with the transmission rod, and the transmission gear is meshed with the worm. The worm is connected with the driving mechanism providing driving force, the worm drives the transmission gear to rotate, the eccentric rotating piece rotates around the center shaft of the transmission gear, and the eccentric rotating piece is connected with the transmission rod, so that the driving force is provided for the transmission rod, and a piston of the piston cylinder is driven to do reciprocating motion. The transmission rod provides driving force for the piston, direct driving of a motor and conversion of a worm and a transmission gear are avoided, the transmission rod can provide large torque, the piston is better driven to operate, and the pump body outputs high-pressure liquid. The radial plunger pump comprises the transmission mechanism.

Description

Technical Field

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

[0002] A piston hydraulic pump is a positive displacement hydraulic pump. By the repeated movement of the piston in the cylinder bore, the volume in the piston cylinder is changed, sucking in low-pressure liquid into the cylinder block and pressing it into the system to output high-pressure liquid. Due to its advantages such as high working output pressure, high efficiency, large power, convenient variable displacement, and durability, piston pumps are widely used in the hydraulic systems of construction machinery. According to the different arrangements of the pistons in the cylinder bore, piston pumps can be divided into radial piston pump heads and axial piston pumps.

[0003] Current radial piston pumps are all directly driven by motors, but the motors themselves can provide insufficient torque, resulting in the inability to achieve large-torque driving of the piston operation. Summary of the Utility Model

[0004] The technical problem to be solved by this application is that current radial piston pumps are all directly driven by motors, but the motors themselves can provide insufficient torque, resulting in the inability to achieve large-torque driving of the piston operation.

[0005] To solve the above technical problem or at least partially solve the above technical problem, this application provides a transmission mechanism and a radial piston pump.

[0006] In a first aspect, the present utility model discloses a transmission mechanism, which includes a worm, a transmission member, a transmission rod, and a rotating shaft. The transmission member is connected to the rotating shaft, and the rotating member rotates around the rotating shaft as the central axis;

[0007] The transmission member is divided into an eccentric rotating member and a transmission gear. The eccentric rotating member is installed on one side surface of the transmission gear. The eccentric rotating member is connected to the transmission rod, and the transmission gear meshes with the worm.

[0008] Preferably, the eccentric rotating member and the transmission gear are integrally formed.

[0009] Preferably, the eccentric rotating member includes a connecting rod and a connecting sleeve. The connecting rod is connected to the connecting sleeve. The connecting rod is installed on the circumferential side of the connecting sleeve. The connecting rod is parallel to the rotating shaft, and the connecting sleeve is connected to the rotating shaft.

[0010] Preferably, the central axis of the worm is perpendicular to the rotating shaft.

[0011] Preferably, the thread of the worm is a left-handed thread.

[0012] Preferably, the transmission gear is a helical gear, and the teeth of the transmission gear are left-handed teeth.

[0013] Preferably, the transmission rod is sequentially installed on the connecting rod.

[0014] Preferably, the transmission rod includes a ferrule portion, a rod portion, and a spherical portion;

[0015] The ferrule portion, the rod portion, and the spherical portion are sequentially connected, and the ferrule portion, the rod portion, and the spherical portion are integrally formed;

[0016] The rod portion is curved or straight.

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

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

[0019] For the transmission mechanism and the radial piston pump provided by the present application, in the transmission mechanism, the worm is connected to the driving mechanism that provides the driving force. The worm drives the transmission gear to rotate, and the eccentric rotating member is arranged on the transmission gear and rotates coaxially with the transmission gear. The eccentric rotating member rotates around the central axis of the transmission gear, and the eccentric rotating member is connected to the transmission rod, thereby providing a driving force for the transmission rod and driving the piston of the piston cylinder to perform reciprocating motion. Since the cooperation between the worm and the transmission member enables the transmission rod to provide a driving force for the piston, direct driving by the motor is avoided. The conversion between the worm and the transmission gear allows the transmission rod to provide a large torque, better driving the piston to operate and enabling the pump body to output high-pressure liquid. In the radial piston pump, the driving mechanism is connected to the transmission mechanism, and the transmission mechanism is connected to the piston cylinder. The piston of the piston cylinder is driven by the transmission rod of the transmission mechanism and performs reciprocating motion in the piston cylinder. The driving force of the driving mechanism is transmitted to the piston cylinder through the transmission mechanism, avoiding direct driving of the piston in the piston cylinder by the driving mechanism and enabling the piston in the piston cylinder to obtain a larger torque during reciprocating motion, achieving large-torque driving of the piston operation. Description of the Drawings

[0020] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present utility model and used together with the specification to explain the principles of the present utility model.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of a transmission mechanism provided by the present application;

[0023] Figure 2 Exploded structural schematic diagram of a transmission mechanism provided for this application;

[0024] Figure 3 Structural schematic diagram of a radial piston pump provided for this application.

[0025] Explanation of reference numerals:

[0026] 100, radial piston pump; 1, transmission mechanism; 2, drive mechanism; 3, piston cylinder;

[0027] 11, worm;

[0028] 12, transmission part; 121, eccentric rotating part; 1211, connecting rod; 1212, connecting sleeve; 122, transmission gear;

[0029] 13, transmission rod; 131, ferrule part; 132, rod-shaped part; 133, spherical part;

[0030] 14, rotating shaft. Specific embodiments

[0031] To make the objectives, 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 accompanying drawings in this application. Obviously, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0032] In a first aspect, referring to Figure 1-2 , the present utility model discloses a transmission mechanism 1, which includes a worm 11, a transmission part 12, a transmission rod 13, and a rotating shaft 14. The transmission part 12 is connected to the rotating shaft 14, the worm 11 is connected to the transmission part 12, the transmission part 12 is connected to the transmission rod 13, and the rotating part rotates around the rotating shaft 14 as the central axis. Specifically, the worm 11 is connected to a drive mechanism 2 that provides driving force, the worm 11 rotates around the central axis, drives the transmission part 12 to rotate, and the installation position of the rotating shaft 14 coincides with the central axis position of the transmission part 12.

[0033] The transmission part 12 is divided into an eccentric rotating part 121 and a transmission gear 122. The eccentric rotating part 121 is installed on one side surface of the transmission gear 122. The eccentric rotating part 121 is connected to the transmission rod 13, and the transmission gear 122 meshes with the worm 11.

[0034] In the transmission mechanism 1, the worm 11 is connected to the driving mechanism 2 that provides driving force. The worm 11 drives the transmission gear 122 to rotate. The eccentric rotating member 121 is arranged on the transmission gear 122 and rotates coaxially with the transmission gear 122. The eccentric rotating member 121 rotates around the central axis of the transmission gear 122. The eccentric rotating member 121 is connected to the transmission rod 13, thereby providing driving force for the transmission rod 13 and driving the piston of the piston cylinder 3 to reciprocate. Since the cooperation between the worm 11 and the transmission member 12 enables the transmission rod 13 to provide driving force for the piston, direct driving by the motor is avoided. The conversion between the worm 11 and the transmission gear 122 can enable the transmission rod 13 to provide large torque and better drive the piston to operate, so that the pump body outputs high-pressure liquid.

[0035] Specifically, the eccentric rotating member 121 and the transmission gear 122 are integrally formed. That is, the eccentric rotating member 121 and the transmission gear 122 are integrally manufactured and arranged, and the rotating speed of the transmission gear 122 is the same as that of the eccentric rotating member 121.

[0036] The thread of the worm 11 is a left-handed thread, the transmission gear 122 is a helical gear, and the teeth of the transmission gear 122 are left-handed teeth. Specifically, the transmission gear 122 meshes with the worm 11, and the central axis of the worm 11 is perpendicular to the central axis of the transmission gear 122. This enables the worm 11 to drive the transmission gear 122 to rotate, thereby causing the transmission rod 13 connected to the eccentric rotating member 121 to move. When the transmission gear 122 rotates one circle around the rotating shaft 14, each transmission rod 13 can push the connected piston to perform a reciprocating motion once.

[0037] The eccentric rotating member 121 includes a connecting rod 1211 and a connecting sleeve 1212. The connecting rod 1211 is connected to the connecting sleeve 1212. The connecting rod 1211 is installed on the circumferential side of the connecting sleeve 1212. The connecting rod 1211 is parallel to the rotating shaft 14, and the connecting sleeve 1212 is connected to the rotating shaft 14.

[0038] Specifically, the connecting rod 1211 and the connecting sleeve 1212 are integrally provided. The central axis of the connecting rod 1211 is parallel to the central axis of the connecting sleeve 1212. The connecting rod 1211 rotates around the central axis of the connecting sleeve 1212. The connecting sleeve 1212 and the rotating shaft 14 are in interference fit, enabling the connecting rod 1211 to rotate around the rotating shaft 14. The transmission rods 13 are sequentially installed on the connecting rod 1211. After the connecting rod 1211 rotates one circle around the rotating shaft 14, each transmission rod 13 can push the connected piston to complete a reciprocating motion once.

[0039] The transmission rod 13 includes a ferrule portion 131, a rod portion 132, and a spherical portion 133; the ferrule portion 131, the rod portion 132, and the spherical portion 133 are connected in sequence, the ferrule portion 131, the rod portion 132, and the spherical portion 133 are integrally formed, and the rod portion 132 is in a curved or straight rod shape. Specifically, the ferrule portion 131 is sleeved on the connecting rod 1211, the spherical portion 133 is installed on the piston, the number of the transmission rods 13 is matched with the number of the piston cylinders 3, and the ferrule portions 131 of all the transmission rods 13 are stacked on the connecting rod 1211. In order to enable each ferrule portion 131 to operate normally, the rod portion 132 can be set to a curved shape or a straight rod shape to avoid collision or blockage between the transmission rods 13 during rotation.

[0040] In a second aspect, referring to Figure 3 , the present utility model discloses a radial piston pump 100, which includes the above-mentioned transmission mechanism 1, driving mechanism 2, housing, and piston cylinder 3. The transmission mechanism 1 is respectively connected to the driving mechanism 2 and the piston cylinder 3. The transmission mechanism 1 and the piston cylinder 3 are installed in the housing, the driving mechanism 2 is installed on the housing and penetrates the housing to drive the transmission mechanism 1 to operate. A piston is provided in the piston cylinder 3, and the transmission mechanism 1 is connected to the piston to drive the piston to perform a reciprocating motion in the piston cylinder 3. The driving mechanism 2 includes a high-speed motor and a large-torque reducer. The worm 11 is installed on the output shaft of the driving mechanism 2, and through the cooperation of the worm 11 and the transmission gear 122, the operation of the transmission rod 13 is driven, enabling the transmission gear 122 to generate a large torque, thereby better driving the transmission rod 13 and the piston.

[0041] Specifically, in the radial piston pump 100, the driving mechanism 2 is connected to the transmission mechanism 1, the transmission mechanism 1 is connected to the piston cylinder 3, and the piston of the piston cylinder 3 is driven by the transmission rod 13 of the transmission mechanism 1 to perform a reciprocating motion in the piston cylinder 3. The driving force of the driving mechanism 2 is transmitted to the piston cylinder 3 through the transmission mechanism 1, avoiding the driving mechanism 2 directly driving the piston in the piston cylinder 3, enabling the piston in the piston cylinder 3 to obtain a larger torque during the reciprocating motion, and realizing the driving of the piston with a large torque.

[0042] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailedly described in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0043] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically and clearly defined.

[0045] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above the top of", and "on the top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below the bottom of", and "under the bottom of" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0047] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. 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 utility model. In this specification, the schematic expression of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0048] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, provided that these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these changes and modifications therein.

[0049] As described above, the above is the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered by the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A transmission mechanism, characterized in that: It includes a worm, a transmission member, a transmission rod, and a rotating shaft, wherein the transmission member is connected to the rotating shaft, and the rotating member rotates around the rotating shaft as the central axis; The transmission member is divided into an eccentric rotating member and a transmission gear. The eccentric rotating member is installed on one side surface of the transmission gear. The eccentric rotating member is connected to the transmission rod, and the transmission gear is meshed with the worm.

2. The transmission mechanism according to claim 1, characterized in that: The eccentric rotating member and the transmission gear are formed integrally.

3. The transmission mechanism according to claim 1, characterized in that: The eccentric rotating member includes a connecting rod and a connecting sleeve, wherein the connecting rod is connected to the connecting sleeve, the connecting rod is installed on the circumferential side of the connecting sleeve, the connecting rod is parallel to the rotating shaft, and the connecting sleeve is connected to the rotating shaft.

4. The transmission mechanism according to claim 1, characterized in that: The central axis of the worm is arranged perpendicular to the rotation axis.

5. The transmission mechanism according to claim 1, characterized in that: The thread of the worm is a left-hand thread.

6. The transmission mechanism according to claim 1, characterized in that: The transmission gear is a helical gear, and the teeth of the transmission gear are left-handed teeth.

7. The transmission mechanism according to claim 3, characterized in that: The transmission rod is sequentially mounted on the connecting rod.

8. The transmission mechanism according to claim 1, characterized in that: The transmission rod comprises a collar portion, a rod-shaped portion, and a spherical portion; The collar portion, the rod portion and the spherical portion are connected in sequence, and the collar portion, the rod portion and the spherical portion are integrally formed; The rod-shaped portion is in a curved or straight rod shape.

9. The transmission mechanism according to claim 8, characterized in that: The ferrule portion is sleeved with the connecting rod.

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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