Eccentric shaft counterweight structure

Abstract

The utility model discloses a counterweight structure of an eccentric shaft. The counterweight structure comprises a counterweight block and a bearing block, a cylindrical hole is formed in the balancing weight and is eccentrically arranged relative to the balancing weight; the bearing block comprises a cylindrical fixed column and a connecting column eccentrically arranged on the fixed column; a rotating shaft hole is eccentrically formed in the connecting column; the central axis of the rotating shaft hole and the central axis of the fixing column are located on the same straight line and penetrate through the fixing column. The fixed column is assembled in the cylindrical hole; the rotating shaft hole is used for being matched and connected with an output shaft of a motor. The connecting column is used for being matched and connected with a piston connecting rod. According to the utility model, the device can be independently machined and then assembled, the error of the machining precision can be smaller than 0.01 mm, the device is convenient to assemble, and the assembly efficiency is improved; in addition, the balancing weight can be assembled into a compact structure, so that the balancing weight is closer to a rotating shaft hole, resonance is smaller during operation, the balancing effect is improved, and the balancing weight is more suitable for avoiding treatment.

Description

[Technical field]

[0001] The utility model relates to the technical field of pumps, in particular to an eccentric shaft counterweight structure. [Background technology]

[0002] The eccentric wheel structure has been widely used in various pump devices. The eccentric wheel is driven by a motor to rotate around the rotating shaft, and the piston can be reciprocated linearly in combination with a connecting rod. Since the eccentric wheel is eccentrically arranged relative to the rotating shaft, it is easy to resonate when rotating around the rotating shaft, and the running noise is very loud, so a counterweight block needs to be set to balance the eccentric wheel.

[0003] However, the existing counterweight structure is usually an integrated processing structure, that is, the counterweight block and the rotating shaft are processed and formed together. Due to the relatively complex overall structure, the overall processing accuracy is low and the efficiency is low during subsequent assembly. In addition, due to the low accuracy of the rotating shaft and bearings, the wear is faster during operation, resulting in a shorter bearing life.

[0004] In view of this, it is necessary to provide an eccentric shaft counterweight structure to overcome the above-mentioned defects. [Contents of the utility model]

[0005] The utility model aims to provide an eccentric shaft counterweight structure, aiming to improve the problems of low assembly efficiency, high processing cost and low precision caused by the complex structure of the existing eccentric counterweight structure.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an eccentric shaft counterweight structure, including a counterweight block and a bearing block; the counterweight block is provided with a cylindrical hole, and the cylindrical hole is eccentrically arranged relative to the counterweight block; the bearing block includes a cylindrical fixing column and a connecting column eccentrically arranged on the fixing column; the connecting column is eccentrically provided with a rotating shaft hole; the central axis of the rotating shaft hole and the central axis of the fixing column are located in the same straight line and pass through the fixing column; the fixing column is assembled in the cylindrical hole; the rotating shaft hole is used to cooperate and connect with the output shaft of the motor, and the connecting column is used to cooperate and connect with the piston connecting rod.

[0007] In a preferred embodiment, the counterweight block includes a sleeve portion and a counterweight portion; the overall center of gravity of the counterweight block is located in the counterweight portion, and the cylindrical hole is opened in the sleeve portion.

[0008] In a preferred embodiment, the counterweight block is provided with a first assembly hole, one end of which is connected to the outside world, and the other end is connected to the cylindrical hole; the fixed column is radially provided with a second assembly hole, one end of which is connected to the outside world, and the other end is connected to the rotating shaft hole; the first assembly hole and the second assembly hole are aligned.

[0009] In a preferred embodiment, the central axis of the connecting column is located on a side away from the counterweight portion.

[0010] The eccentric shaft counterweight structure provided by the utility model adopts a split design for the counterweight block and the bearing block, which can be machined separately and then assembled, with a machining accuracy of less than 0.01mm, and is easy to assemble, thereby improving assembly efficiency. In addition, the central axis of the connecting column and the center of the counterweight block are respectively arranged on opposite sides of the rotating shaft hole, and can be assembled into a compact structure, so that the counterweight block is closer to the rotating shaft hole, the resonance is smaller during operation, the balancing effect is improved, and it is more suitable for avoidance processing.

Brief Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 A three-dimensional diagram of a bearing block in an eccentric shaft counterweight structure provided by the utility model;

[0013] Figure 2 for Figure 1 A longitudinal section of the bearing block shown;

[0014] Figure 3 for Figure 2 A three-dimensional diagram of a counterweight block in the eccentric shaft counterweight structure shown;

[0015] Figure 4 for Figure 3 A three-dimensional view of the counterweight shown from another angle.

[0016] Numbers in the figure:

[0017] 10. counterweight block; 101. cylindrical hole; 102. first assembly hole; 11. sleeve connection portion; 12. counterweight portion;

[0018] 20. Bearing block; 201. Rotating shaft hole; 202. Second assembly hole; 21. Fixing column; 22. Connecting column. [Specific implementation method]

[0019] In order to make the purpose, technical solution and beneficial technical effect of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for explaining the utility model, and are not intended to limit the utility model.

[0020] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0021] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0022] In an embodiment of the utility model, an eccentric shaft counterweight structure is provided, which is used to be arranged in various pump structures to connect the motor and the piston connecting rod. It can not only convert the rotational drive of the motor into the linear reciprocating motion of the piston connecting rod, but also reduce the resonance during operation and reduce the operating noise.

[0023] like Figure 1-Figure 4 As shown, the eccentric shaft counterweight structure includes a counterweight block 10 and a bearing block 20 .

[0024] Specifically, the counterweight block 10 is provided with a cylindrical hole 101 , and the cylindrical hole 101 is eccentrically arranged relative to the entire counterweight block 10 .

[0025] The counterweight block 10 includes a sleeve portion 11 and a counterweight portion 12. The center of gravity of the counterweight block 10 is located in the counterweight portion 12, and the cylindrical hole 101 is formed in the sleeve portion 11.

[0026] In this embodiment, the bearing block 20 includes a cylindrical fixing column 21 and a connecting column 22 eccentrically arranged on the fixing column 21. The fixing column 21 and the connecting column 22 are stacked up and down, and the cross-sectional radius of the connecting column 22 is smaller than the cross-sectional radius of the fixing column 21. The central axis of the fixing column 21 does not coincide with the central axis of the connecting column 22.

[0027] The connecting column 22 is eccentrically provided with a rotating shaft hole 201, that is, the central axis of the rotating shaft hole 201 does not coincide with the central axis of the connecting column 22. The central axis of the rotating shaft hole 201 and the central axis of the fixing column 21 are located in the same straight line and pass through the fixing column 21. The fixing column 21 is assembled in the cylindrical hole 101. Furthermore, the central axis of the connecting column 22 is located on a side away from the counterweight portion 12.

[0028] The rotating shaft hole 201 is used to cooperate with the output shaft of the motor, that is, the motor can drive the bearing block 20 and the counterweight block 10 to rotate. The connecting column 22 is used to cooperate with the piston connecting rod, and one end of the piston connecting rod is sleeved on the connecting column 22. When the fixed column 21 rotates around the central axis of the rotating shaft hole 201, the central axis of the connecting column 22 also rotates around the central axis of the rotating shaft hole 201, and the rotational motion can be converted into a linear motion at the other end of the piston connecting rod through the action of the piston connecting rod.

[0029] Specifically, the counterweight 10 is provided with a first assembly hole 102, one end of which is in communication with the outside, and the other end of which is in communication with the cylindrical hole 101. The fixing column 21 is provided with a second assembly hole 202 in the radial direction, one end of which is in communication with the outside, and the other end of which is in communication with the rotating shaft hole 201. The first assembly hole 102 is aligned with the second assembly hole 202, so that the fixing column 21 can be firmly fixed on the counterweight 10.

[0030] To sum up, the eccentric shaft counterweight structure provided by the utility model adopts a split design for the counterweight block 10 and the bearing block 20, which can be machined separately and then assembled, and the machining accuracy can achieve an error of less than 0.01mm, and it is convenient to assemble, thereby improving the assembly efficiency; in addition, the central axis of the connecting column 22 and the center of the counterweight block 10 are respectively arranged on the opposite sides of the shaft hole 201, and can be assembled into a compact structure, so that the counterweight block 10 is closer to the shaft hole 201, and the resonance is smaller during operation, thereby improving the balancing effect, and being more suitable for avoidance processing.

[0031] The present invention is not limited to what is described in the specification and implementation modes, and therefore, additional advantages and modifications can be easily realized by those familiar with the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein.

Claims

1. An eccentric shaft counterweight structure, characterized in that: It includes a counterweight block and a bearing block; the counterweight block is provided with a cylindrical hole, which is eccentrically arranged relative to the counterweight block; the bearing block includes a cylindrical fixing column and a connecting column eccentrically arranged on the fixing column; the connecting column is eccentrically provided with a rotating shaft hole; the central axis of the rotating shaft hole and the central axis of the fixing column are located in the same straight line and pass through the fixing column; the fixing column is assembled in the cylindrical hole; the rotating shaft hole is used to cooperate and connect with the output shaft of the motor, and the connecting column is used to cooperate and connect with the piston connecting rod.

2. The eccentric shaft counterweight structure according to claim 1, characterized in that: The counterweight block includes a sleeve connection portion and a counterweight portion; the overall center of gravity of the counterweight block is located in the counterweight portion, and the cylindrical hole is opened in the sleeve connection portion.

3. The eccentric shaft counterweight structure according to claim 2, characterized in that: The counterweight block is provided with a first assembly hole, one end of which is connected to the outside world, and the other end is connected to the cylindrical hole; the fixed column is radially provided with a second assembly hole, one end of which is connected to the outside world, and the other end is connected to the rotating shaft hole; the first assembly hole is aligned with the second assembly hole.

4. The eccentric shaft counterweight structure according to claim 2, characterized in that: The central axis of the connecting column is located at a side away from the counterweight portion.

Images