Air compressor driving device and air compressor

Abstract

The utility model belongs to the technical field of compressors, and particularly discloses an air compressor driving device and an air compressor. The air compressor driving device comprises a rotary driving part and an eccentric part, wherein the rotary driving part comprises an output shaft; the eccentric part comprises a first mounting hole, the eccentric part is arranged on the peripheral face of the output shaft through the first mounting hole, and the eccentric part is suitable for being in rolling connection with a plunger in a compressor valve body so as to drive the plunger to reciprocate in the preset direction when the eccentric part rotates. The plunger can not be driven to swing, and the sealing performance of the plunger can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and in particular relates to an air compressor driving device and an air compressor. Background Art

[0002] In the air supply unit of the automobile air suspension system, the air compressor driving device drives the plunger to reciprocate to achieve air suction and pumping. In the related art, the air compressor driving device includes a motor and an eccentric structure, the eccentric structure is connected to the output shaft of the motor, the eccentric structure includes an eccentric piece, a connecting shaft and a bearing, the connecting shaft is arranged on the eccentric piece and is arranged parallel to the output shaft of the motor, the bearing is arranged on the connecting shaft, the plunger is connected to the bearing, the eccentric piece is driven to rotate by the rotation of the motor, the eccentric piece drives the connecting shaft to rotate, and the connecting shaft drives the plunger to reciprocate and swing through the bearing to achieve continuous air pumping. However, the plunger does not need to swing during operation. The eccentric structure drives the plunger to swing, which will reduce the sealing performance of the plunger and reduce the pressure building efficiency. Summary of the invention

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiment of the utility model provides an air compressor driving device, which is conducive to improving the sealing performance of the plunger.

[0004] The embodiment of the utility model also provides an air compressor.

[0005] The air compressor driving device of the embodiment of the utility model includes: a rotating driving member, which includes an output shaft; an eccentric member, which includes a first mounting hole, and the eccentric member is arranged on the outer peripheral surface of the output shaft through the first mounting hole, and the eccentric member is suitable for rolling connection with the plunger in the compressor valve body to drive the plunger to reciprocate along a preset direction when the eccentric member rotates.

[0006] It can be understood that the rotating drive member drives the eccentric member to rotate through the output shaft, and the eccentric structure of the eccentric member allows the eccentric member to drive the plunger to move back and forth along the preset direction to achieve the effect of pumping air. While the plunger moves along the preset direction, it will not swing in a direction deviating from the preset direction, thereby avoiding the degradation of sealing performance caused by the swing of the plunger, which is beneficial to building pressure and improving air supply efficiency.

[0007] In this embodiment, the eccentric member is an eccentric bearing.

[0008] In this embodiment, the eccentric member and the output shaft are interference fit.

[0009] In this embodiment, the air compressor driving device is characterized in that it also includes a support member, the support member includes a second mounting hole, the support member is rotatably arranged on the outer peripheral surface of the output shaft through the second mounting hole, and the support member is located on the side of the eccentric member away from the rotating driving member, and the support member is suitable for being arranged in the valve body.

[0010] In this embodiment, the supporting member is a bearing.

[0011] In this embodiment, the output shaft includes a first shaft segment and a second shaft segment connected in sequence, the diameter of the first shaft segment is larger than the diameter of the second shaft segment, the eccentric member is arranged on the first shaft segment, and the support bearing is arranged on the second shaft segment.

[0012] The air compressor of the utility model embodiment comprises a valve body, a plunger and the above-mentioned air compressor driving device, wherein the plunger and the eccentric member are both arranged in the valve body, the plunger is located on the radial side of the eccentric member, and the plunger is movable relative to the valve body along the preset direction.

[0013] In this embodiment, two plungers are provided, the two plungers are arranged opposite to each other and connected to each other, the two plungers are respectively arranged on two opposite sides of the eccentric member, and the two plungers are connected to each other. .

[0014] In this embodiment, the two opposite end surfaces of the two plungers are both arc-shaped surfaces matching the side wall of the eccentric member, and an accommodating space for installing the eccentric member is formed between the two arc-shaped surfaces.

[0015] In this embodiment, the air compressor further comprises a retaining ring, and the tops of both ends of the two plungers adjacent to each other are provided with protrusions, and the peripheral side walls of the two protrusions are provided with retaining grooves, and the retaining ring is engaged in the retaining grooves to connect the two plungers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of an air compressor driving device according to an embodiment of the utility model.

[0017] Figure 2 It is a side structural schematic diagram of an air compressor driving device according to an embodiment of the utility model.

[0018] Figure 3 to Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle.

[0019] Figure 4 It is a partial structural schematic diagram of an air compressor according to an embodiment of the utility model.

[0020] Reference numerals:

[0021] 1. Rotating driving member; 11. Output shaft; 111. First shaft section; 112. Second shaft section; 2. Eccentric member; 3. Plunger; 31. Protrusion; 311. Slot; 4. Accommodating space. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0023] In this embodiment, if Figures 1 to 4 As shown, the air compressor driving device includes a rotary driving member 1 and an eccentric member 2, and the rotary driving member 1 includes an output shaft 11. The eccentric member 2 includes a first mounting hole, and the eccentric member 2 is arranged on the outer peripheral surface of the output shaft 11 through the first mounting hole. The eccentric member 2 is suitable for rolling connection with the plunger 3 in the compressor valve body to drive the plunger 3 to reciprocate along a preset direction (the X direction in the figure is the preset direction) when the eccentric member 2 rotates.

[0024] For example, the rotary drive member 1 is a motor, and the eccentric member 2 is arranged on the output shaft 11 of the motor, and the motor drives the eccentric member 2 to rotate. The eccentric member 2 can be an eccentric wheel, which can be easily manufactured and has a simple process.

[0025] It can be understood that the rotating drive member 1 drives the eccentric member 2 to rotate through the output shaft 11. The eccentric structure of the eccentric member 2 allows the eccentric member 2 to drive the plunger 3 to move back and forth along a preset direction to achieve the effect of pumping air. While the plunger 3 moves along the preset direction, it will not swing in other directions, thereby avoiding the reduction in sealing performance caused by the swing of the plunger 3 in a direction deviating from the preset direction, which is beneficial to building pressure and improving air supply efficiency.

[0026] In this embodiment, the eccentric member 2 is an eccentric bearing.

[0027] It is understandable that setting the eccentric piece 2 as an eccentric bearing can reduce the friction between the eccentric piece 2 and the plunger 3, which is beneficial to improving the operating effect. In addition, the eccentric bearing is a standard part and does not require separate mold opening and processing, which is beneficial to reducing costs and facilitating assembly.

[0028] In this embodiment, the eccentric member 2 and the output shaft 11 are interference fit.

[0029] It should be noted that the eccentric member 2 and the output shaft 11 are interference fit, and the eccentric member 2 and the output shaft 11 can be connected by press fitting, which is convenient for assembly. Whether the motor rotates forward or reverse, the eccentric member 2 will not be loosened, thereby improving the reliability of the connection between the eccentric member 2 and the output shaft 11. Of course, the eccentric member 2 and the output shaft 11 can also be connected by other means, for example, by a key connection, which is not limited here.

[0030] In this embodiment, the air compressor driving device also includes a support member (not shown in the figure), the support member includes a second mounting hole, the support member is rotatably arranged on the outer peripheral surface of the output shaft 11 through the second mounting hole, and the support member is located on the side of the eccentric member 2 away from the rotating driving member 1, and the support member is suitable for being arranged in the valve body.

[0031] Specifically, when the output shaft 11 is connected to the support member, the support member may be first installed in the valve body (not shown in the figure), and then the output shaft 11 may be inserted into the second installation hole of the support member.

[0032] It can be understood that the support member supports and fixes the shaft end of the output shaft 11, preventing the output shaft 11 from forming a cantilever beam. The movement clearance of the output shaft 11 is small. Even when the output shaft 11 of the rotating drive member 1 runs at a high speed, the shaft end will not increase the vibration amplitude with the increase of the loading load, which effectively reduces the vibration of the output shaft 11, is conducive to reducing noise, and can also reduce the flexible deformation of the output shaft 11.

[0033] In this embodiment, the supporting member is a bearing.

[0034] For example, the bearing can be a needle bearing or a cylindrical bearing, so that the bearing has a higher radial load capacity and is suitable for high-speed rotation. Of course, the support member can also be set as other bearings, which is not limited here.

[0035] It can be understood that by configuring the support member as a bearing, the bearing is a standard part and does not need to be processed separately, which helps to reduce costs and facilitate assembly.

[0036] In this embodiment, the output shaft 11 is a round shaft or a square shaft, and the first mounting hole matches the output shaft 11 .

[0037] Specifically, the output shaft 11 can be a round shaft, or the output shaft 11 can be set as a square shaft for easy processing. Of course, the output shaft 11 can also be set as other shapes, which are not limited here.

[0038] In this embodiment, if Figure 2 and Figure 3 As shown, the output shaft 11 includes a first shaft segment 111 and a second shaft segment 112 connected in sequence, the diameter of the first shaft segment 111 is larger than the diameter of the second shaft segment 112 , the eccentric member 2 is arranged on the first shaft segment 111 , and the support member is arranged on the second shaft segment 112 .

[0039] It can be understood that the diameter of the first shaft section 111 of the output shaft 11 is larger than the diameter of the second shaft section 112. When the eccentric member 2 and the output shaft 11 are connected by interference fit, it is convenient to install the eccentric member 2 on the second shaft section 112. At the same time, the support member can abut against the shoulders of the second shaft section 112 and the first shaft section 111, which can facilitate the positioning of the support member.

[0040] In this embodiment, if Figure 4 As shown, the air compressor includes a valve body (not shown in the figure), a plunger 3 and the above-mentioned air compressor drive device, the plunger 3 and the eccentric member 2 are both arranged in the valve body, the plunger 3 is located on the radial side of the eccentric member 2, and the plunger 3 is movable relative to the valve body along a preset direction.

[0041] It should be noted that the specific structure of the valve body and the plunger 3 and the specific connection method between the plunger 3 and the valve body are prior arts and will not be described in detail here.

[0042] The rotating driving member 1 drives the eccentric member 2 to rotate through the output shaft 11. The eccentric structure of the eccentric member 2 allows the eccentric member 2 to drive the plunger 3 to move back and forth along a preset direction to achieve the effect of pumping air. While the plunger 3 moves along the preset direction, it will not swing in other directions, thereby avoiding the reduction in sealing performance caused by the swing of the plunger 3, which is beneficial to building pressure and improving air supply efficiency.

[0043] In this embodiment, the support member is disposed in the valve body, and the output shaft 11 is inserted into the second mounting hole of the support member.

[0044] Specifically, the support member is installed in the valve body, and the output shaft 11 is inserted in the support member. The support member supports and fixes the shaft end of the output shaft 11 to prevent the output shaft 11 from forming a cantilever beam. The movement clearance of the output shaft 11 is small. Even when the output shaft 11 of the rotating drive member 1 runs at a high speed, the vibration amplitude of the shaft end will not increase with the increase of the loading load, which effectively reduces the vibration of the output shaft 11 and is beneficial to reducing noise.

[0045] In this embodiment, if Figure 4 As shown, two plungers 3 are provided, and the two plungers 3 are respectively arranged on two opposite sides of the eccentric member 2, and the two plungers 3 are connected to each other.

[0046] It can be understood that the two plungers 3 are respectively arranged on the opposite sides of the eccentric member 2 and are connected to each other. The rotation of the eccentric member 2 can drive the two plungers 3 to move in the same direction, so that the plunger 3 on one side can inhale air and the plunger 3 on the other side can pump air, which can continuously output high-pressure gas and is conducive to improving efficiency.

[0047] In this embodiment, if Figure 4As shown, the two opposite end faces of the two plungers 3 are both arc-shaped surfaces matching the side wall of the eccentric member 2, and an accommodating space 4 for installing the eccentric member 2 is formed between the two arc-shaped surfaces.

[0048] By forming the accommodation space 4 between the two plungers 3, the installation of the eccentric piece 2 can be facilitated, and the plunger 3 abuts against the eccentric piece 2 through the arc surface, which is beneficial to improve the stability of the connection between the eccentric piece 2 and the plunger 3.

[0049] In this embodiment, the air compressor further includes a retaining ring (not shown in the figure), and the tops of the two adjacent ends of the two plungers 3 are provided with protrusions 31, and the outer peripheral side walls of the two protrusions 31 are provided with retaining grooves 311, and the retaining ring is clamped in the retaining grooves 311.

[0050] Specifically, the clamping grooves 311 on the two protrusions 31 are connected to each other to form an annular groove, so that the clamping ring can be clamped in the annular groove to connect the two plungers 3. The two plungers 3 are provided with grooves on the side away from the protrusions 31, so that the two plungers 3 can form a receiving space 4 after being connected. The clamping ring includes an opening to facilitate clamping the clamping ring on the two protrusions 31.

[0051] It can be understood that by providing a clamping groove 311 on the protruding portion 31 and clamping the clamping ring in the clamping groove 311, the two plungers 3 are connected to each other, which is convenient for operation and installation.

[0052] In this embodiment, an eccentric member 2 is provided on the output shaft 11 of the rotary drive member 1, and a support member is provided at the shaft end of the output shaft 11 to support the output shaft 11, so that the rotary drive member 1 drives the plunger 3 to reciprocate along the preset direction through the eccentric structure of the eccentric member 2, so as to achieve the effect of pumping air. While the plunger 3 moves along the preset direction, it will not swing in other directions, thereby avoiding the reduction in sealing performance caused by the swing of the plunger 3 in a direction deviating from the preset direction, which is beneficial to pressure building and improving the air supply efficiency. At the same time, the output shaft 11 is supported by the support member to avoid the formation of a cantilever beam of the output shaft 11, which can reduce the flexible deformation of the output shaft 11, and the movement clearance of the output shaft 11 is small. Even when the output shaft 11 of the rotary drive member 1 runs at a high speed, the vibration amplitude of the shaft end will not increase with the increase of the loading load, thereby effectively reducing the vibration of the output shaft 11 and helping to reduce noise.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must include a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0057] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0058] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An air compressor driving device, characterized in that: include: a rotary drive member, the rotary drive member comprising an output shaft; The eccentric member includes a first mounting hole, and the eccentric member is arranged on the outer peripheral surface of the output shaft through the first mounting hole. The eccentric member is suitable for rolling connection with the plunger in the compressor valve body to drive the plunger to reciprocate along a preset direction when the eccentric member rotates.

2. The air compressor driving device according to claim 1, characterized in that: The eccentric piece is an eccentric bearing.

3. The air compressor driving device according to claim 1, characterized in that: The eccentric member and the output shaft are interference fit.

4. The air compressor driving device according to claim 1, characterized in that: It also includes a support member, which includes a second mounting hole. The support member is rotatably arranged on the outer peripheral surface of the output shaft through the second mounting hole, and the support member is located on the side of the eccentric member away from the rotating drive member. The support member is suitable for being arranged in the valve body.

5. The air compressor driving device according to claim 4, characterized in that: The supporting member is a bearing.

6. The air compressor driving device according to claim 4, characterized in that: The output shaft comprises a first shaft section and a second shaft section which are connected in sequence, the diameter of the first shaft section is larger than the diameter of the second shaft section, the eccentric member is arranged on the first shaft section, and the support member is arranged on the second shaft section.

7. An air compressor, characterized in that: The invention comprises a valve body, a plunger and an air compressor driving device according to any one of claims 1 to 6, wherein the plunger and the eccentric member are both arranged in the valve body, the plunger is located on the radial side of the eccentric member, and the plunger is movable relative to the valve body along the preset direction.

8. The air compressor according to claim 7, characterized in that: The two plungers are provided with two plungers, which are respectively arranged on two opposite sides of the eccentric member and are connected to each other.

9. The air compressor according to claim 8, characterized in that: The two opposite end surfaces of the two plungers are both arc-shaped surfaces matching the side wall of the eccentric piece, and an accommodating space for installing the eccentric piece is formed between the two arc-shaped surfaces.

10. The air compressor according to claim 8, characterized in that It also includes a clamping ring. The tops of the two ends of the two plungers adjacent to each other are both provided with protrusions, and the outer peripheral side walls of the two protrusions are provided with clamping grooves. The clamping ring is clamped in the clamping groove to connect the two plungers.

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