Anti-rotation scroll compressor of pin-pin structure

Abstract

The utility model discloses a kind of anti-rotation scroll compressor of pin-pin structure, it includes meshing together static disc and dynamic disc and the crankshaft of driving dynamic disc rotation, the back surface of the dynamic disc is equipped with front cover, pin-pin structure is equipped between the dynamic disc and front cover, the pin-pin structure includes equal number of fixed pin and rotating pin, fixed pin is fixed in front cover, each fixed pin is annularly distributed with scroll compressor axis as center, rotating pin is fixed on the back surface of dynamic disc, each rotating pin is respectively contacted with each fixed pin, when the crankshaft drives dynamic disc rotation, each rotating pin rotates around each fixed pin respectively. The utility model sets up pin-pin structure between the front cover and dynamic disc of scroll compressor, and multiple pin-pin structures inhibit dynamic disc rotation around the center of circle.Compared with the ring pin structure of prior art, the assembly size and the size precision of pin-pin structure itself are higher, and the occupied space is less, rotating pin and fixed pin are linear contact, the contact area is small, and the noise generated is relatively smaller.

Description

Technical Field

[0001] This utility model relates to an anti-rotation scroll compressor with a pin-pin structure, belonging to the technical field of scroll compressors. Background Technology

[0002] Scroll compressors are a common type of compressor used in automotive air conditioning systems. They are characterized by their small size, low noise, and light weight, and are widely used in the automotive air conditioning field. A scroll compressor consists of a stationary disc and a moving disc meshing together. These meshing discs form several crescent-shaped compression chambers. Driven by a crankshaft, the moving disc rotates in a plane around the center of the stationary disc's base circle. As the crankshaft rotates, the volume of the crescent-shaped compression chambers changes, and the gas drawn into the chambers is compressed. To prevent the moving disc from rotating on its own, an anti-rotation mechanism is typically used. Existing anti-rotation mechanisms are ring pin structures. This structure involves a locating pin on the front cover and a locating hole on the back of the moving disc. A locating ring is placed inside the locating hole to limit the locating pin's movement. When the compressor is running, the locating pin contacts the inner wall of the locating ring, thereby inhibiting the moving disc's rotation. The anti-rotation mechanism of this ring pin structure has the following disadvantages: (1) It occupies a lot of space: the positioning ring occupies a lot of space, while the space on the back of the moving plate is limited, which limits the number of ring pin structures and thus affects the anti-rotation effect; (2) It is noisy: the contact area between the positioning pin and the inner wall of the positioning ring is large, which increases the friction and increases the noise of the compressor operation; (3) It is difficult to process and manufacture: the positioning hole must be set on the back of the moving plate first, and then the positioning ring is assembled into the positioning hole. The overall processing and assembly is time-consuming and laborious. Utility Model Content

[0003] The purpose of this invention is to provide a pin-pin structure anti-rotation scroll compressor to solve the technical problems of limited anti-rotation effect, high noise, and high processing and manufacturing difficulty of the existing ring pin structure.

[0004] This utility model adopts the following technical solution: a pin-pin structure anti-rotation scroll compressor, which includes a stationary disk and a moving disk meshing together, and a crankshaft that drives the moving disk to rotate. The back of the moving disk is provided with a front cover, and a pin-pin structure is provided between the moving disk and the front cover. The pin-pin structure includes an equal number of fixed pins and rotating pins. The fixed pins are fixed inside the front cover, and each fixed pin is distributed in a ring around the axis of the scroll compressor. The rotating pins are fixed on the back of the moving disk, and each rotating pin contacts each fixed pin. When the crankshaft drives the moving disk to rotate, each rotating pin rotates around each fixed pin.

[0005] There is a gap between the end of the fixed pin and the moving plate, and there is a gap between the rotating pin and the inner side of the front cover.

[0006] The height of the gap is 2-5mm, and the height of the contact area between the fixed pin and the rotating pin is 5-10mm.

[0007] A wear-resistant plate is provided between the front cover and the moving plate. The wear-resistant plate has pin holes through which the fixing pins on the front cover pass. The number of pin holes is equal to the number of wear-resistant plates.

[0008] The fixed pin and the rotating pin are the same size.

[0009] The diameter of the fixing pin is 3-5mm and the height is 10-14mm.

[0010] The number of fixing pins is an odd number, which is four or more.

[0011] The number of the fixing pins is divisible by 360.

[0012] The number of fixed pins and rotating pins is 9 each.

[0013] The beneficial effects of this invention are as follows: This invention incorporates a pin-pin structure between the front cover and the moving disc of the scroll compressor. When the scroll compressor is running, the moving disc rotates, and each rotating pin on the moving disc rotates around each fixed pin on the front cover. Multiple pin-pin structures can suppress the rotation of the moving disc around its center. Compared to the existing ring pin structure, the pin-pin structure has higher assembly and dimensional accuracy, which is more conducive to the stability of the compressor during translational operation. The pin-pin structure occupies less space than the ring pin structure, allowing for more pins to be placed on the back of the moving disc, further suppressing the swaying of the moving disc during operation. In the pin-pin structure, the rotating pin and the fixed pin have line contact, resulting in a smaller contact area and relatively lower noise. Compared to the machining and assembly of positioning holes and positioning rings, the machining and assembly process of the rotating pins and fixed pins is simpler, thus improving the machining and assembly efficiency of the compressor.

[0014] As a preferred embodiment, there are gaps between the end of the fixed pin and the moving plate, and between the rotating pin and the inner side of the front cover. Therefore, the end of the fixed pin and the moving plate do not contact each other, and the rotating pin and the front cover do not contact each other. This ensures that the fixed pin and the rotating pin only have line contact, resulting in a small contact area, low friction, and low compressor operating noise.

[0015] As a preferred option, since compressor motors mostly use an even number of pole pairs, in order to avoid resonance during operation, the number of pins should be avoided to the extent that there are no even numbers. Therefore, the number of fixed pins and rotating pins is always an odd number.

[0016] As a preferred option, the number of both the fixed pins and the rotating pins is divisible by 360, which makes the pin-pin structure easy to machine and position. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a pin-pin structure anti-rotation scroll compressor; Figure 2 yes Figure 1 Exploded view; Figure 3 yes Figure 1 A plan view of the moving disc rotating relative to the front cover; Figure 4 This is a simplified diagram of a sales-to-sales structure.

[0018] In the diagram: 1-crankshaft, 2-front cover, 2.1-fixed pin, 3-cylindrical roller bearing, 4-wear-resistant plate, 5-eccentric sleeve, 6-sliding bearing, 7-moving disc, 7.1-rotating pin. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1 to 4 As shown in the figure, an anti-rotation scroll compressor with a pin-pin structure according to an embodiment of the present invention includes a stationary disc (the stationary disc is omitted in the figure) and a moving disc 7 meshing together, and a crankshaft 1 that drives the moving disc 7 to rotate. A front cover 2 is provided on the back of the moving disc 7. A cylindrical roller bearing 3 is provided between the crankshaft 1 and the front cover 2. An eccentric sleeve 5 is connected to the crankshaft 1. A sliding bearing 5 is provided between the eccentric sleeve 5 and the moving disc 6. A wear-resistant plate 4 is provided between the front cover 2 and the moving disc 6.

[0021] A pin-pin structure is provided between the moving disk 7 and the front cover 2. This pin-pin structure includes an equal number of fixed pins 2.1 and rotating pins 7.1. The fixed pins 2.1 are fixed inside the front cover 2, and are arranged in a ring around the axis of the scroll compressor. The wear-resistant plates 4 have pin holes through which the fixed pins 2.1 on the front cover 2 pass, and the number of pin holes is equal to the number of wear-resistant plates. The rotating pins 7.1 are fixed to the back of the moving disk 7, and each rotating pin 7.1 contacts each fixed pin 2.1. When the crankshaft 1 drives the moving disk 7 to rotate, each rotating pin 7.1 rotates around each fixed pin 2.1. There is a gap between the end of the fixed pin 2.1 and the moving disk, and a gap between the rotating pin 2.1 and the inner side of the front cover 2. The height of these gaps is 2-5 mm, and the height of the contact area between the fixed pin 2.1 and the rotating pin 7.1 is 5-10 mm.

[0022] In this embodiment, the fixed pin 2.1 and the rotating pin 7.1 are the same size, with the fixed pin 2.1 having a diameter of 3-5 mm and a height of 10-14 mm.

[0023] Since compressor motors mostly use an even number of pole pairs, in order to avoid resonance, the number of pins should be avoided to the extent possible. Therefore, the number of fixed pins 2.1 is preferably an odd number of four or more. At the same time, for ease of processing and positioning, the number of fixed pins 2.1 is preferably divisible by 360. Therefore, in this embodiment, the number of fixed pins 2.1 and rotating pins 7.1 is 9 each.

[0024] When the scroll compressor is running, the moving disc rotates, and each rotating pin on the moving disc rotates around a fixed pin on the front cover. Multiple pin-pin structures can suppress the rotation of the moving disc around its center. Compared to the existing ring pin structure, the pin-pin structure has higher assembly and dimensional accuracy, which is more conducive to the stability of the compressor during translational operation. The pin-pin structure occupies less space than the ring pin structure, allowing for more pins to be placed on the back of the moving disc, further suppressing the swaying of the moving disc during operation. In the pin-pin structure, the rotating pin and the fixed pin have line contact, resulting in a smaller contact area and relatively less noise. Compared to the machining and assembly of positioning holes and positioning rings, the machining and assembly process of rotating pins and fixed pins is simpler, thus improving the machining and assembly efficiency of the compressor.

Claims

1. A pin-pin structure anti-rotation scroll compressor, comprising a stationary disc and a moving disc meshing together, and a crankshaft driving the moving disc to rotate, wherein a front cover is provided on the back of the moving disc, characterized in that: A pin-pin structure is provided between the moving disc and the front cover. The pin-pin structure includes an equal number of fixed pins and rotating pins. The fixed pins are fixed inside the front cover. Each fixed pin is distributed in a ring around the axis of the scroll compressor. The rotating pins are fixed on the back of the moving disc. Each rotating pin contacts each fixed pin. When the crankshaft drives the moving disc to rotate, each rotating pin rotates around each fixed pin.

2. The anti-rotation scroll compressor with a pin-pin structure according to claim 1, characterized in that: There is a gap between the end of the fixed pin and the moving plate, and there is a gap between the rotating pin and the inner side of the front cover.

3. The anti-rotation scroll compressor with a pin-pin structure according to claim 2, characterized in that: The height of the gap is 2-5mm, and the height of the contact area between the fixed pin and the rotating pin is 5-10mm.

4. The anti-rotation scroll compressor with a pin-pin structure according to claim 1, characterized in that: A wear-resistant plate is provided between the front cover and the moving plate. The wear-resistant plate has pin holes through which the fixing pins on the front cover pass. The number of pin holes is equal to the number of wear-resistant plates.

5. The anti-rotation scroll compressor with a pin-pin structure according to claim 1, characterized in that: The fixed pin and the rotating pin are the same size.

6. The anti-rotation scroll compressor with a pin-pin structure according to claim 5, characterized in that: The diameter of the fixing pin is 3-5mm and the height is 10-14mm.

7. The anti-rotation scroll compressor with a pin-pin structure according to claim 1, characterized in that: The number of fixing pins is an odd number, which is four or more.

8. The anti-rotation scroll compressor with a pin-pin structure according to claim 1, characterized in that: The number of the fixing pins is divisible by 360.

9. The anti-rotation scroll compressor with a pin-pin structure according to claim 1, characterized in that: The number of fixed pins and rotating pins is 9 each.

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