Compressor crankshaft with counterweight component

Abstract

The utility model relates to the technical field of compressor crankshafts, in particular to a compressor crankshaft with a counterweight component, which comprises a front end shaft, two cranks, an eccentric shaft and a rear end shaft, counterweight blocks and inner angle screws are arranged on the two cranks, and the counterweight blocks are fixedly embedded into crank bodies through the inner angle screws; the plurality of balancing weights are sequentially arranged in the direction perpendicular to the axis of the front end shaft; the balancing weight and the eccentric shaft are located on the opposite sides of the axis of the front end shaft. By means of the compressor crankshaft balancing weight replacing device, the efficiency of replacing the balancing weight of the compressor crankshaft can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor crankshafts, and specifically relates to a compressor crankshaft with a counterweight component. Background Art

[0002] Traditional refrigeration compressors are generally composed of two main parts: a motor and a piston. The rotor of the motor is connected to a crankshaft. The crankshaft includes an eccentric shaft and a straight shaft. The straight shaft is connected to the motor rotor, and the eccentric shaft is connected to the piston through a connecting rod. The motor drives the crankshaft to rotate and drives the piston to move. Therefore, the crankshaft is the main rotating part of the compressor, and the performance and structure of the crankshaft are related to the working performance of the compressor. In order to ensure that the eccentric shaft does not shake when the crankshaft rotates, it is necessary to reasonably counterweight the eccentric shaft so that it is symmetrical with respect to the center of gravity on both sides of the straight shaft. In view of the above problems, a Chinese patent in the prior art discloses a method for preparing a compressor crankshaft counterweight component and a compressor crankshaft. Publication number: CN116792391A. By installing a counterweight box assembly and a counterweight assembly on the crank, the counterweight block can be replaced according to the counterweight demand. However, the counterweight box assembly and the counterweight assembly in the patent have too many parts, and the installation and replacement are not simple and fast enough. Based on this, a simple and fast counterweight solution is proposed, which is a problem that needs to be solved in this field. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a compressor crankshaft with a counterweight component, which can improve the efficiency of replacing the counterweight of the compressor crankshaft.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a compressor crankshaft with a counterweight component, comprising a front end shaft, two cranks, an eccentric shaft, and a rear end shaft, wherein the two cranks are provided with a counterweight block and an internal angle screw, wherein the counterweight block is fixedly embedded in the crank body by the internal angle screw; a plurality of counterweight blocks are provided, and the plurality of counterweight blocks are arranged in sequence along a direction perpendicular to the axis of the front end shaft; the counterweight block and the eccentric shaft are located on opposite sides of the axis of the front end shaft.

[0005] Preferably, the axis of the internal angle screw is perpendicular to the axis of the front end shaft.

[0006] Preferably, a counterweight groove matching the counterweight block is provided on the crank body; the counterweight block is arranged in the counterweight groove; and the internal angle screw passes through the counterweight block and the counterweight groove to be fixedly connected to the crank body.

[0007] Preferably, the counterweight grooves are provided in a plurality and correspond one to one with the counterweight blocks; the plurality of counterweight grooves are distributed in an array along a direction perpendicular to the axis of the front end shaft.

[0008] Preferably, the counterweight block and the eccentric shaft are located at the front and rear sides of the corresponding crank body.

[0009] Preferably, the outer end surface of the counterweight block is flush with the outer side surface of the crank body at the corresponding position.

[0010] Preferably, the counterweight block is slidably connected to the internal angle screw.

[0011] Preferably, the counterweight groove is an arc-shaped structure or a square structure.

[0012] Preferably, the screw rod of the internal angle screw is threadedly connected to the middle portion of the crank body.

[0013] Preferably, the counterweight slot is provided with a plurality of counterweight blocks which are stacked one by one in the counterweight slot along a direction perpendicular to the axis of the front end shaft by means of internal angle screws.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: a counterweight groove for accommodating a counterweight block and a screw hole for accommodating a screw are provided at the lower end of the crank; after the screw hole and the counterweight groove are assembled, the screw passes through the counterweight block and is threadedly connected to the middle part of the crank to fix the counterweight block; the counterweight block can be fixed by using only one screw, which is convenient and quick, and can improve the efficiency of replacing the counterweight of the compressor crankshaft; at the same time, multiple counterweight grooves and counterweight blocks can be provided, and when in use, the number of counterweight blocks can be increased or decreased to perform gradient counterweighting, thereby improving the accuracy after counterweighting and making the crankshaft rotation more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model;

[0016] Figure 2 It is a schematic diagram of the front structure of the crankshaft of the utility model after removing the counterweight block;

[0017] Figure 3 It is a schematic diagram of the rear structure of the crankshaft of the utility model after removing the counterweight block;

[0018] Figure 4 It is a schematic diagram of a longitudinal section of the crank and counterweight installation structure of the utility model.

[0019] In the figure: 1 front end shaft, 2 crank, 3 eccentric shaft, 4 rear end shaft, 5 counterweight block, 6 internal angle screw, 21 counterweight slot, 22 screw hole. DETAILED DESCRIPTION

[0020] The following describes the specific implementation of the utility model in detail in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand how to practice the utility model. Although the utility model is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative, rather than limiting the scope of the utility model.

[0021] Specific embodiment 1: Please refer to Figure 1-4 A compressor crankshaft with a counterweight component comprises: a front end shaft 1, two cranks 2, an eccentric shaft 3, and a rear end shaft 4, wherein the front end shaft 1 and the rear end shaft 4 are coaxially arranged, the two cranks 2 and the eccentric shaft 3 are arranged between the front end shaft 1 and the rear end shaft 4, wherein the two cranks 2 are arranged opposite to each other, and the upper ends of the two cranks 2 are fixedly connected by the eccentric shaft 3; each crank 2 is provided with a counterweight block 5 and an internal angle screw 6, and the counterweight block 5 is fixed to the lower end of the crank 2 by the internal angle screw 6. It can be understood that in order to prevent the eccentric shaft 3 of the crankshaft from shaking when the crankshaft rotates, the counterweight block 5 and the eccentric shaft 3 are placed on opposite sides of the axis of the front end shaft 1, so that the center of gravity on both sides of the axis of the front end shaft 1 is symmetrical.

[0022] Furthermore, the crank 2 is provided with two arc-shaped counterweight grooves 21, which are adapted to the counterweight block 5. The two counterweight grooves 21 are distributed in an array along a direction perpendicular to the axis of the front end shaft 1, which can also be understood as the two counterweight grooves 21 being diffusely distributed in a direction perpendicular to the axis of the front end shaft 1; the lower part of the crank 2 is also provided with a screw hole 22 for accommodating an internal angle screw 6 along a direction perpendicular to the axis of the front end shaft 1. In order to achieve fixation, the screw hole 22 is connected to the two counterweight grooves 21; the counterweight block 5 is also provided with a through hole coaxial with the screw hole 22; further, the counterweight groove 21 and the eccentric shaft 3 are located on both sides of the corresponding crank 2 body, that is, the counterweight groove 21 is located on the outside, which is convenient for subsequent counterweighting.

[0023] When in use, the counterweight block 5 is placed in the counterweight groove 21, and the internal angle screw 6 passes through the counterweight groove 21 and the through hole and is threadedly connected and fixed to the middle part of the crank 2. At this time, the outer periphery of the counterweight block 5 and the screw of the internal angle screw 6 are slidably connected.

[0024] The outer end surface of the counterweight block 5 is flush with the outer side surface of the crank 2 at the corresponding position.

[0025] In one embodiment, the number of counterweight slots 21 is not limited to the two mentioned above, and can be one or more. If there are multiple counterweight slots 21, the multiple counterweight slots 21 are still distributed in an array in a direction perpendicular to the axis of the front end shaft 1. Similarly, the number of counterweight blocks 5 is consistent with the number of counterweight slots 21, and the two are set accordingly. When in use, the number of counterweight blocks 5 can be increased or decreased to perform gradient counterweighting, thereby improving the accuracy after counterweighting and making the crankshaft rotation more stable.

[0026] In one embodiment, the shape of the counterweight slot 21 is not limited to the above-mentioned arc structure, for example, it can be a circular, square or other structure.

[0027] In one embodiment, one counterweight slot 21 can be provided, and multiple counterweight blocks 5 can be provided. The multiple counterweight blocks 5 are all set in the counterweight slot 21 through internal angle screws 6, and the multiple counterweight blocks 5 are stacked one by one along a direction perpendicular to the axis of the front end shaft 1.

[0028] In addition, as an optimization, if multiple counterweight slots are provided, the multiple counterweight slots do not have to be identical. For example, a large and a small counterweight slot may be provided to optimize the gradient counterweight.

[0029] Through the technical solution, a counterweight groove for accommodating a counterweight block and a screw hole for accommodating a screw are opened at the lower end of the crank. After the screw hole and the counterweight groove are assembled, the screw passes through the counterweight block and is threadedly connected to the middle part of the crank to fix the counterweight block. The counterweight block can be fixed by using one screw, which is convenient and quick, and can improve the efficiency of replacing the counterweight of the compressor crankshaft. At the same time, multiple counterweight grooves and counterweight blocks can be provided, and when in use, the number of counterweight blocks can be increased or decreased to perform gradient counterweighting, thereby improving the accuracy after counterweighting and making the crankshaft rotation more stable.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A compressor crankshaft with a counterweight component, comprising a front end shaft (1), two cranks (2), an eccentric shaft (3), and a rear end shaft (4), characterized in that: The two cranks (2) are both provided with a counterweight (5) and an internal angle screw (6), wherein the counterweight (5) is fixedly embedded in the crank (2) body by the internal angle screw (6); a plurality of counterweights (5) are provided, and the plurality of counterweights (5) are arranged in sequence along a direction perpendicular to the axis of the front end shaft (1); the counterweight (5) and the eccentric shaft (3) are located on opposite sides of the axis of the front end shaft (1).

2. A compressor crankshaft with a counterweight component according to claim 1, characterized in that: The axis of the internal angle screw (6) is perpendicular to the axis of the front end shaft (1).

3. A compressor crankshaft with a counterweight component according to claim 1, characterized in that: The crank (2) body is provided with a counterweight groove (21) matching the counterweight block (5); the counterweight block (5) is arranged in the counterweight groove (21); and the internal angle screw (6) penetrates the counterweight block (5) and the counterweight groove (21) to be fixedly connected to the crank (2) body.

4. A compressor crankshaft with a counterweight component according to claim 3, characterized in that: A plurality of the counterweight grooves (21) are provided and correspond one to one with the counterweight blocks (5); the plurality of the counterweight grooves (21) are distributed in an array along a direction perpendicular to the axis of the front end shaft (1).

5. A compressor crankshaft with a counterweight component according to claim 3, characterized in that: The counterweight block (5) and the eccentric shaft (3) are located at the front and rear sides of the corresponding crank (2) body.

6. A compressor crankshaft with a counterweight component according to claim 5, characterized in that: The outer end surface of the counterweight block (5) is flush with the outer side surface of the crank (2) body at the corresponding position.

7. A compressor crankshaft with a counterweight component according to claim 3, characterized in that: The counterweight block (5) is slidably connected to the internal angle screw (6).

8. A compressor crankshaft with a counterweight component according to claim 3, characterized in that: The counterweight groove (21) is an arc-shaped structure or a square structure.

9. A compressor crankshaft with a counterweight component according to claim 1, characterized in that: The screw rod of the internal angle screw (6) is threadedly connected to the middle part of the crank (2) body.

10. A compressor crankshaft with a counterweight component according to claim 3, characterized in that: The counterweight groove (21) is provided with a plurality of counterweight blocks (5) which are stacked one by one in the counterweight groove (21) along a direction perpendicular to the axis of the front end shaft (1) via internal angle screws (6).

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