Straight shaft eccentric counterweight structure

Abstract

The utility model discloses a straight shaft eccentric counterweight structure which comprises a rotating shaft hole, an eccentric wheel and a counterweight part, wherein the eccentric wheel and the counterweight part are respectively arranged on two opposite sides of the rotating shaft hole; an eccentric hole is formed in the center of the eccentric wheel; the rotating shaft hole is used for matching connection with a rotating shaft of a motor, and the eccentric hole is used for matching connection with a straight shaft. According to the straight shaft eccentric counterweight structure provided by the utility model, the straight shaft can be firstly connected into the eccentric hole, and the rotating shaft hole is sleeved on the rotating shaft of the motor, so that the assembly efficiency is higher; in addition, the eccentric wheel and the balance weight part are arranged on the two opposite sides of the rotating shaft hole respectively, an integrated compact structure is formed, the balance weight part is closer to the rotating shaft hole, resonance is smaller during operation, the balance effect is improved, and the balance device is more suitable for avoiding treatment. In addition, the whole structure can be manufactured through casting, machining is not needed, and the machining cost is reduced.

Description

[Technical field]

[0001] The utility model relates to the technical field of pumps, in particular to a straight-axis eccentric 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 blocks need to be machined separately, which is very costly. In addition, the existing counterweight blocks need to be assembled on the motor shaft after machining. Due to the complex structure, the assembly efficiency is low. Moreover, the center of gravity of the counterweight blocks is usually far away from the shaft, resulting in greater resonance during operation and poor balancing effect.

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

[0005] The utility model aims to provide a straight-axis eccentric counterweight structure, aiming to improve the existing eccentric counterweight structure, which has the problems of low assembly efficiency, high processing cost and poor balancing effect due to its complex structure.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a straight shaft eccentric counterweight structure, including a rotating shaft hole and an eccentric wheel and a counterweight part respectively arranged on opposite sides of the rotating shaft hole; an eccentric hole is opened at the center of the eccentric wheel; the rotating shaft hole is used to cooperate with the rotating shaft of the motor, and the eccentric hole is used to cooperate with the straight shaft.

[0007] In a preferred embodiment, the counterweight portion is provided with an assembly hole; the central axis of the assembly hole is parallel to the line connecting the center of the shaft hole and the center of the eccentric hole; one end of the assembly hole is connected to the outside world, and the other end is connected to the shaft hole.

[0008] In a preferred embodiment, the counterweight portion is symmetrically arranged along a straight line connecting the center of the shaft hole and the center of the eccentric hole.

[0009] In a preferred embodiment, the counterweight portion includes a first side surface, a second side surface and a third side surface respectively arranged at both ends of the first side surface, and a fourth side surface connected to the same side of the second side surface and the third side surface; the central axis of the shaft hole is located in the plane where the first side surface is located; the fourth side surface is an arc surface with the center of the shaft hole as the center of the circle.

[0010] In a preferred embodiment, the second side surface and the third side surface are both arranged perpendicular to the first side surface.

[0011] In a preferred embodiment, the connection between the first side surface and the second side surface and the connection between the first side surface and the third side surface are chamfered.

[0012] The straight shaft eccentric counterweight structure provided by the utility model can be assembled more efficiently by first connecting the straight shaft to the eccentric hole and sleeve the rotating shaft hole on the motor shaft; in addition, the eccentric wheel and the counterweight are respectively arranged on opposite sides of the rotating shaft hole, forming an integrated compact structure, so that the counterweight is closer to the rotating shaft hole, the resonance is smaller during operation, the balancing effect is improved, and it is more suitable for avoiding position processing. In addition, the entire structure can be made by casting, without machining, reducing the processing cost.

Brief Description of the Drawings

[0013] 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.

[0014] Figure 1 A three-dimensional diagram of the straight-axis eccentric counterweight structure provided by the utility model during assembly;

[0015] Figure 2 for Figure 1 A three-dimensional diagram of the straight shaft eccentric counterweight structure shown;

[0016] Figure 3 for Figure 2 A three-dimensional view of the straight-axis eccentric counterweight structure from another angle.

[0017] Numbers in the figure: 100, straight shaft eccentric counterweight structure; 200, motor; 300, straight shaft; 101, rotating shaft hole; 20, eccentric wheel; 201, eccentric hole; 30, counterweight part; 301, assembly hole; 31, first side; 32, second side; 33, third side; 34, fourth side. [Specific implementation method]

[0018] 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.

[0019] 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.

[0020] 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.

[0021] In an embodiment of the utility model, a straight shaft eccentric weight structure 100 is provided, which is used to be arranged in various pump structures to connect the motor 200 and the straight shaft 300, which can convert the rotation drive of the motor 200 into linear reciprocating motion through the straight shaft 300, and can also reduce resonance and operating noise during operation. The straight shaft 300 is also rotatably connected to the piston connecting rod.

[0022] like Figure 1-Figure 3 As shown, the straight-axis eccentric counterweight structure 100 includes a rotating shaft hole 101 and an eccentric wheel 20 and a counterweight portion 30 respectively disposed on two opposite sides of the rotating shaft hole 101 .

[0023] The eccentric wheel 20 and the counterweight part 30 are integrated, and the shaft hole 101 is provided at the connection between the two. Therefore, the entire structure can be made by casting without machining, which reduces the processing cost. At the same time, in order to improve the balancing effect, the weight difference between the counterweight part 30 and the eccentric wheel 20 is small. Compared with the traditional counterweight structure, the center of gravity of the counterweight part 30 is closer to the shaft hole 101, which makes the resonance smaller during operation and is more suitable for avoidance treatment.

[0024] It should be noted that the diameter of the shaft hole 101 is adapted to the output shaft of the motor 200 , and the output shaft can be inserted into the shaft hole 101 for assembly. That is, the shaft hole 101 is used to cooperate with the shaft of the motor 200 .

[0025] An eccentric hole 201 is provided at the center of the eccentric wheel 20. The eccentric hole 201 is used to be connected with the straight shaft 300. When the eccentric hole 201 rotates around the output shaft of the motor 200, the straight reciprocating motion of the piston connecting rod can be achieved through the action of the straight shaft 300. The counterweight part 30 is arranged on the opposite side of the eccentric wheel 20 to balance the rotation of the eccentric wheel 20.

[0026] Specifically, the counterweight part 30 is provided with an assembly hole 301. The central axis of the assembly hole 301 is parallel to the line connecting the center of the shaft hole 101 and the center of the eccentric hole 201. That is, one end of the assembly hole 301 is connected to the outside, and the other end is connected to the shaft hole 101. When the output shaft of the motor 200 extends into the shaft hole 101, the output shaft can be firmly fixed in the shaft hole 101 by screwing the assembly hole 301.

[0027] Furthermore, the counterweight part 30 is symmetrically arranged along the straight line connecting the center of the shaft hole 101 and the center of the eccentric hole 201. The assembly hole 301 can be opened and arranged along the symmetrical straight line.

[0028] Specifically, the counterweight portion 30 is in the shape of a sheet of uniform thickness, and includes a first side surface 31 , a second side surface 32 and a third side surface 33 respectively disposed at two ends of the first side surface 31 , and a fourth side surface 34 connected to the same side of the second side surface 32 and the third side surface 33 .

[0029] The central axis of the rotating shaft hole 101 is located in the plane where the first side surface 31 is located, that is, the first side surface 31 is the dividing surface between the counterweight part 30 and the eccentric wheel 20 (the dividing surface is integrally connected at the connecting portion of the counterweight part 30 and the eccentric wheel 20, refer to Figure 2 and Figure 3 The fourth side surface 34 is an arc surface with the center of the shaft hole 101 as the center. When the counterweight 30 rotates around the shaft hole 101, the fourth side surface 34 located on the outside rotates along the circular surface where it is located, thereby improving the balancing effect.

[0030] Furthermore, the second side surface 32 and the third side surface 33 are both arranged perpendicular to the first side surface 31 , and the connection between the first side surface 31 and the second side surface 32 and the connection between the first side surface 31 and the third side surface 33 are chamfered.

[0031] In summary, the straight shaft eccentric counterweight structure 100 provided by the utility model can be assembled more efficiently by first connecting the straight shaft 300 to the eccentric hole 201 and sleeve the rotating shaft hole 101 on the rotating shaft of the motor 200; in addition, the eccentric wheel 20 and the counterweight part 30 are respectively arranged on opposite sides of the rotating shaft hole 101, forming an integrated compact structure, so that the counterweight part 30 is closer to the rotating shaft hole 101, the resonance is smaller during operation, the balancing effect is improved, and it is more suitable for avoidance treatment. In addition, the entire structure can be made by casting, without machining, reducing the processing cost.

[0032] 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. A straight axis eccentric counterweight structure, characterized in that: It includes a rotating shaft hole and an eccentric wheel and a counterweight part respectively arranged on opposite sides of the rotating shaft hole; an eccentric hole is opened at the center of the eccentric wheel; the rotating shaft hole is used for matching and connecting with the rotating shaft of the motor, and the eccentric hole is used for matching and connecting with the straight shaft.

2. The straight-axis eccentric weight structure according to claim 1, characterized in that: The counterweight part is provided with an assembly hole; the central axis of the assembly hole is parallel to the line connecting the center of the shaft hole and the center of the eccentric hole; one end of the assembly hole is connected to the outside, and the other end is connected to the shaft hole.

3. The straight-axis eccentric weight structure according to claim 1, characterized in that: The counterweight part is symmetrically arranged along a straight line where a line connecting the center of the rotating shaft hole and the center of the eccentric hole is located.

4. The straight-axis eccentric counterweight structure according to claim 3, characterized in that: The counterweight portion includes a first side surface, a second side surface and a third side surface respectively arranged at two ends of the first side surface, and a fourth side surface connected to the same side of the second side surface and the third side surface; the central axis of the shaft hole is located in the plane where the first side surface is located; the fourth side surface is an arc surface with the center of the shaft hole as the center of the circle.

5. The straight-axis eccentric counterweight structure according to claim 4, characterized in that: The second side surface and the third side surface are both arranged perpendicular to the first side surface.

6. The straight-axis eccentric weight structure according to claim 5, characterized in that: A connection between the first side surface and the second side surface and a connection between the first side surface and the third side surface are chamfered.

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