Diaphragm pump eccentric bushing, eccentric bushing assembly and mounting structure thereof

Abstract

The utility model discloses a diaphragm pump eccentric bushing, an eccentric bushing assembly and a mounting structure of the diaphragm pump eccentric bushing, a shaft hole is arranged inside the eccentric bushing, the shaft hole extends to one axial end of the eccentric bushing to form an opening, a radially raised shoulder part is arranged outside the eccentric bushing, one end of the shoulder part far away from the opening is a plane end, and the other end of the shoulder part is a plane end. The end, where the opening is located, of the eccentric sleeve is an inclined face end which is not parallel to the plane where the plane end is located, and the inclined face end is perpendicular to the shaft hole. A positioning structure capable of keeping the shaft hole vertical is arranged at the end, away from the opening, of the eccentric sleeve. According to the utility model, the positioning structure is arranged at one end, far away from the shaft hole, of the eccentric sleeve, so that the shaft hole is kept vertically upward during crimping, the output shaft of the motor is aligned with the shaft hole, the installation of the motor and the eccentric sleeve assembly can be completed only under the action of the vertical crimping head, a universal joint is not needed, the requirement on crimping equipment is low, and the installation efficiency is relatively high.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm pumps, in particular to an eccentric sleeve of a diaphragm pump, an eccentric sleeve assembly and a mounting structure thereof. Background Art

[0002] With the development of the home appliance industry and the upgrading of electrical appliances, diaphragm pumps are needed in more and more places.

[0003] The eccentric sleeve is the core part of the diaphragm pump, and the eccentric assembly assembled by it determines the performance of the diaphragm pump. The eccentric assembly used in the diaphragm pump on the market currently has a unique eccentric structure, such as the eccentric sleeve disclosed in CN216589054U, whose two end faces are not parallel. When crimping with the motor, the motor shaft is placed upward and the shaft hole of the eccentric sleeve is aligned with the motor shaft. At this time, the upward side of the eccentric sleeve is tilted, so it is necessary to use a universal crimping head to align the end face of the eccentric sleeve for crimping. The equipment requirements are high, and the universal crimping head moves vertically downward during crimping. At this time, the inclination of the upper surface of the eccentric sleeve will cause the eccentric sleeve to have a component force in the horizontal direction, causing the eccentric sleeve to move horizontally. Therefore, the eccentric sleeve needs to be manually adjusted continuously during the crimping process. The entire crimping process is cumbersome and the efficiency is extremely low.

[0004] Therefore, it is necessary to design an eccentric sleeve structure that can be crimped in a simpler and more efficient manner. Utility Model Content

[0005] In order to solve the technical problems in the prior art such as easy horizontal deviation, high requirements for crimping equipment and low crimping efficiency when the eccentric sleeve is crimped with the motor, the utility model provides a diaphragm pump eccentric sleeve, an eccentric sleeve assembly and its installation structure to solve the above problems.

[0006] The utility model proposes an eccentric sleeve of a diaphragm pump, wherein the interior of the eccentric sleeve is provided with an axial hole, the axial hole extends to one axial end of the eccentric sleeve to form an opening, the exterior of the eccentric sleeve is provided with a radially raised shoulder, the end of the shoulder away from the opening is a plane end, the end of the eccentric sleeve where the opening is located is a bevel end, the bevel end is not parallel to the plane where the plane end is located, and the bevel end is arranged perpendicular to the axial hole; the end of the eccentric sleeve away from the opening is provided with a positioning structure capable of keeping the axial hole vertical.

[0007] Furthermore, the positioning structure has an axial end face and a positioning side face, and the axial section where the highest point and the lowest point of the bevel end are located is the first plane. The axial end face and / or the positioning side face can rotate the bevel end around the normal of the first plane to a horizontal state.

[0008] Furthermore, the axial end surface is parallel to the plane end.

[0009] Furthermore, the positioning structure is a positioning groove recessed inwardly from the end surface of the eccentric sleeve or a positioning protrusion protruding from the end surface of the eccentric sleeve.

[0010] Furthermore, the eccentric sleeve includes a first shaft segment and a second shaft segment axially connected, the diameter of the first shaft segment is larger than the diameter of the second shaft segment, the opening and the bevel end are located at one end of the first shaft segment, the plane end is located at the other end of the first shaft segment, and the positioning structure is located at the end of the second shaft segment.

[0011] Furthermore, the first shaft segment and the second shaft segment are integrally formed.

[0012] Furthermore, the cross section of the positioning groove or positioning protrusion is in the shape of a straight line.

[0013] Furthermore, the width of the positioning structure is 20%-40% of the outer diameter of the second shaft segment; the depth of the positioning structure is 40%-60% of the axial length of the second shaft segment.

[0014] The utility model also proposes an eccentric sleeve assembly, including a thrust ring, a gasket, a bearing, a diaphragm seat and the diaphragm pump eccentric sleeve described above, wherein the bearing axial limit is located between the diaphragm seat and the plane end, the inner bracket of the bearing is connected to the outer peripheral surface of the eccentric sleeve of the diaphragm pump, the outer bracket of the bearing is connected to the diaphragm seat, and the thrust ring, gasket, bearing and diaphragm seat are axially connected and fixed in sequence.

[0015] The utility model also proposes an installation structure, including an installation fixture and the eccentric sleeve assembly described above, the top of the installation fixture has a groove for placing the eccentric sleeve assembly, the inner bottom surface of the groove has a limiting portion that cooperates with the positioning structure, when the positioning structure and the limiting portion are assembled, the shaft hole is vertical.

[0016] Furthermore, the inner bottom surface of the groove also has one or more bearing plates abutting against the end surface of the inner bracket of the bearing.

[0017] The beneficial effects of the utility model are:

[0018] The utility model provides a positioning structure at the end of the eccentric sleeve away from the shaft hole, so that the shaft hole is kept vertically upward during crimping, thereby aligning the motor output shaft with the shaft hole. The installation of the motor and the eccentric sleeve assembly can be completed only under the action of the vertical crimping head, without the need for a universal joint, low requirements on the crimping equipment, and high installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 This is a front view of the eccentric sleeve of the diaphragm pump described in the utility model;

[0021] Figure 2 It is a three-dimensional diagram of the eccentric sleeve of the diaphragm pump described in the utility model (the inclined surface end faces upward);

[0022] Figure 3 This is a three-dimensional diagram of the eccentric sleeve of the diaphragm pump described in the utility model (with the flat side facing upwards)

[0023] Figure 4 It is a stereoscopic diagram of the eccentric sleeve assembly of the utility model;

[0024] Figure 5 It is an exploded view of the eccentric sleeve assembly of the utility model;

[0025] Figure 6 It is an axial cross-sectional view of the eccentric sleeve assembly of the utility model;

[0026] Figure 7 It is a front view of a specific implementation of the installation structure of the utility model;

[0027] Figure 8 It is an axial cross-sectional view of the installation structure of the utility model.

[0028] In the figure, 1, eccentric sleeve, 101, shaft hole, 102, opening, 103, plane end, 104, bevel end, 2, positioning groove, 201, positioning side, 202, axial end face, 3, first shaft section, 4, second shaft section, 5, thrust ring, 6, gasket, 7, bearing, 8, diaphragm seat, 9, eccentric sleeve assembly, 10, mounting fixture, 1001, groove, 1002, limit part, 1003, bearing plate, 11, carrier, 12, base, 13, fastening screw, 14, first plane. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] Embodiment 1

[0031] like Figure 1-Figure 3 and Figure 6As shown, a diaphragm pump eccentric sleeve, the eccentric sleeve 1 has an axial hole 101 inside, the axial hole 101 extends to one axial end of the eccentric sleeve 1 to form an opening 102, when the eccentric sleeve assembly 9 is crimped with the motor, the motor shaft is inserted into the axial hole 101 from the opening 102, the eccentric sleeve 1 has a radially raised shoulder on the outside, the end of the shoulder away from the opening 102 is a plane end 103, the raised shoulder makes the eccentric sleeve 1 form a stepped shaft structure, the shaft section with a smaller outer diameter is used to be fixed with the inner bracket of the bearing 7 of the eccentric sleeve assembly 9, the plane end 103 is used to abut against the end face of the inner bracket of the bearing 7, one end of the eccentric sleeve 1 where the opening 102 is located is a bevel end 104, the bevel end 104 is not parallel to the plane where the plane end 103 is located, and the bevel end 104 is arranged perpendicular to the axial hole 101; the end of the eccentric sleeve 1 away from the opening 102 is provided with a positioning structure that can keep the axial hole 101 vertical, so that the bevel end 104 is horizontal.

[0032] The positioning structure cooperates with the installation fixture 10 to achieve the vertical positioning effect of the shaft hole 101. The utility model adds a positioning structure to the end of the traditional eccentric sleeve 1, and adjusts the crimping surface from the upper end surface of the traditional eccentric sleeve 1 (the end facing away from the shaft hole 101) to the lower end surface (the end where the shaft hole 101 is located). The pre-installed posture of the eccentric sleeve 1 is adjusted by the positioning structure, and the lower end surface of the eccentric sleeve 1, that is, the bevel end 104 in the utility model is adjusted to a horizontal plane, so that the motor shaft can be crimped downward. The press directly crimps the tail of the motor to keep the press, the motor, and the eccentric sleeve 1 on the same vertical line. Therefore, there is no need to use a universal joint. A simpler vertical joint can be used. The vertical joint does not need to adjust the position in real time (no horizontal displacement will occur), thereby improving the crimping efficiency and the crimping success rate.

[0033] When the plane end 103 is in a horizontal state, the bevel end 104 is inclined. At this time, the bevel end 104 has a highest point and a lowest point. An axial section is cut through the highest point and the lowest point on the eccentric sleeve to obtain a first plane 14, that is, Figure 6The plane where the shadow surface in the figure is located, the bevel end 104 can be regarded as an inclined surface obtained by rotating around the normal of the plane. Therefore, if you want to adjust the bevel end 104 to a horizontal state, the simplest way is to rotate the eccentric sleeve as a whole in the opposite direction around the normal of the first plane 14. In a specific embodiment of the utility model, the positioning structure has an axial end face 202 and a positioning side face 201. The axial end face 202 and / or the positioning side face 201 can rotate the bevel end 104 around the normal of the first plane 14 to a horizontal state, that is, the two ends are made horizontal by raising the lowest point of the bevel end 104 or sinking the highest point of the bevel end 104. When the axial end face 202 abuts against the mounting fixture 10, the axial end face 202 can play an axial limiting role, and the positioning side face 201 is only used for radial limiting. The axial end face 202 and the positioning side face 201 cooperate to adjust the bevel end 104 to a horizontal state. The bevel end 104 can also be adjusted to be horizontal by positioning the structure of the side surface 201 itself (such as a curved surface design). At this time, the axial end surface 202 may not abut against the mounting fixture 10, and support can be achieved only by the contact between the bearing 7 and the end surface of the mounting fixture 10.

[0034] When the axial end face 202 is used for axial positioning, for ease of processing, the axial end face 202 is preferably parallel to the plane end 103. During installation, the axial end face 202 is tilted in the opposite direction to the bevel end 104 to make the originally tilted bevel end 104 reach a horizontal state.

[0035] The positioning structure can be a positioning groove 2 that is recessed inwardly from the end surface of the eccentric sleeve 1 or a positioning protrusion that protrudes from the end surface of the eccentric sleeve 1. Specifically, the positioning structure can be only the positioning groove 2, or only the positioning protrusion, or a combination of the positioning groove 2 and the positioning protrusion. Usually, only the positioning groove 2 or the positioning protrusion needs to be designed separately. When the positioning groove 2 is used, the inner side surface of the positioning groove 2 is the positioning side surface 201, and when the positioning protrusion is used, the outer side surface of the positioning protrusion is the positioning side surface 201.

[0036] Regarding the shape of the positioning structure, taking the positioning groove 2 as an example (the same applies to the positioning boss), the positioning groove 2 can have a non-circular cross section or a circular cross section, such as a semicircular, polygonal, straight, etc.

[0037] In the specific implementation of the utility model, the positioning structure is a straight-line positioning groove 2, such as Figure 3 As shown, the length direction of the positioning groove 2 is the direction in which the axial end face 202 needs to be inclined during installation, and the two ends of the positioning groove 2 in the length direction are connected, and the two ends in the width direction form positioning side faces 201. The positioning side faces 201 can be a plane or a curved surface. When the positioning side faces 201 are curved surfaces, the positioning side faces 201 may have a certain slope with the axial end face 202. When the positioning side faces 201 are planes, the positioning side faces 201 can be perpendicular to the axial end face 202 for easy processing.

[0038] The eccentric sleeve 1 specifically includes a first shaft segment 3 and a second shaft segment 4 connected axially, the diameter of the first shaft segment 3 is larger than the diameter of the second shaft segment 4, the opening 102 and the bevel end 104 are located at one end of the first shaft segment 3, the plane end 103 is located at the other end of the first shaft segment 3, and the positioning structure is located at the end of the second shaft segment 4. The shaft hole 101 extends from the first shaft segment 3 to the second shaft segment 4, but does not penetrate the second shaft segment 4, and the first shaft segment 3 and the second shaft segment 4 can be made separately and then welded and fixed, or can be integrally formed.

[0039] The positioning structure added to the eccentric sleeve 1 will have a certain impact on the structural strength of the eccentric sleeve 1 and the installation position of the eccentric sleeve 1 in the diaphragm pump. In order to ensure the structural strength of the eccentric sleeve 1 while avoiding installation interference, when the positioning structure is a straight-line structure, the width of the positioning structure is 20%-40% of the outer diameter of the second shaft segment 4, and the width of the positioning structure refers to the shorter side length of the cross-section of the positioning structure; the depth of the positioning structure is 40%-60% of the axial length of the second shaft segment 4.

[0040] Embodiment 2

[0041] An eccentric sleeve assembly 9, such as Figure 4-Figure 6 As shown, it includes a thrust ring 5, a gasket 6, a bearing 7, a diaphragm seat 8 and the diaphragm pump eccentric sleeve 1 mentioned above. The bearing 7 is axially limited between the diaphragm seat 8 and the flat end 103. The inner bracket of the bearing 7 is connected to the outer peripheral surface of the diaphragm pump eccentric sleeve 1, and the outer bracket of the bearing 7 is connected to the diaphragm seat 8. The thrust ring 5, the gasket 6, the bearing 7 and the diaphragm seat 8 are axially connected and fixed in sequence. As shown in the figure, the diaphragm seat 8 is provided with a screw hole, and the fastening screw 13 is fixed to the diaphragm seat 8 after passing through the thrust ring 5. The gasket 6 is pressed on the end of the outer bracket of the bearing 7, and the thrust ring 5 presses the gasket 6. The diaphragm seat 8 is annular, so that the positioning groove 2 of the eccentric sleeve 1 is exposed, and the installation fixture 10 can pass through the center of the diaphragm seat 8 and cooperate with the positioning groove 2.

[0042] Embodiment 3

[0043] like Figure 7 and Figure 8 As shown, a mounting structure includes a mounting fixture 10 and the eccentric sleeve assembly 9 described above. The top of the mounting fixture 10 has a groove 1001 for placing the eccentric sleeve assembly 9. The inner bottom surface of the groove 1001 has a limiting portion 1002 that cooperates with the positioning structure. When the positioning structure and the limiting portion 1002 are assembled, the shaft hole 101 is vertical. Figure 6 and Figure 8As shown, the positioning structure is a positioning groove 2, and the limiting portion 1002 is a limiting block inserted into the positioning groove 2. The two relative positioning side surfaces 201 of the positioning groove 2 cooperate with the limiting portion 1002 to keep the inclined surface end 104 horizontal and prevent tilting. The end surfaces of the positioning groove 2 and the limiting portion 1002 may or may not be in contact, and preferably abut against each other.

[0044] The inner bottom surface of the groove 1001 is further provided with one or more bearing plates 1003 that abut against the end surface of the inner bracket of the bearing 7 to support the eccentric sleeve assembly 9.

[0045] like Figure 8 As shown, the mounting fixture 10 is divided into a carrier 11 located at the top and a base 12 located at the bottom. The carrier 11 is used to place the eccentric sleeve assembly 9. The inclined surface end 104 is horizontal through the cooperation of the limiting portion 1002 on the carrier 11 and the positioning structure. The base 12 can be fixed normally. The carrier 11 can be designed according to the structure of the eccentric sleeve 1. When the size and model of the eccentric sleeve 1 changes, only the carrier 11 needs to be replaced accordingly.

[0046] In the description of the present invention, it is necessary to understand that the terms "center", "width", "up", "down", "vertical", "horizontal", "inside", "outside", "axial" 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, in the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0048] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments.

[0049] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An eccentric sleeve of a diaphragm pump, characterized in that: The eccentric sleeve (1) has an axial hole (101) inside, the axial hole (101) extends to one axial end of the eccentric sleeve (1) to form an opening (102), the eccentric sleeve (1) has a radially protruding shoulder on the outside, the end of the shoulder away from the opening (102) is a plane end (103), the end of the eccentric sleeve (1) where the opening (102) is located is a bevel end (104), the bevel end (104) is not parallel to the plane where the plane end (103) is located, and the bevel end (104) is arranged perpendicular to the axial hole (101); An end of the eccentric sleeve (1) away from the bevel end (104) is provided with a positioning structure capable of keeping the shaft hole (101) vertical.

2. The eccentric sleeve of the diaphragm pump according to claim 1, characterized in that: The positioning structure comprises an axial end face (202) and a positioning side face (201), and the axial section where the highest point and the lowest point of the bevel end (104) are located is a first plane (14). The axial end face (202) and / or the positioning side face (201) can rotate the bevel end (104) around the normal of the first plane (14) to a horizontal state.

3. The eccentric sleeve of the diaphragm pump according to claim 2, characterized in that: The axial end surface (202) is parallel to the plane end (103).

4. The eccentric sleeve of the diaphragm pump according to any one of claims 1 to 3, characterized in that: The positioning structure is a positioning groove (2) recessed inwardly from the end surface of the eccentric sleeve (1) or a positioning protrusion protruding from the end surface of the eccentric sleeve (1).

5. The eccentric sleeve of the diaphragm pump according to claim 4, characterized in that: The eccentric sleeve (1) comprises a first shaft section (3) and a second shaft section (4) which are axially connected, the diameter of the first shaft section (3) being larger than the diameter of the second shaft section (4), the opening (102) and the bevel end (104) being located at one end of the first shaft section (3), the plane end (103) being located at the other end of the first shaft section (3), and the positioning structure being located at the end of the second shaft section (4).

6. The eccentric sleeve of the diaphragm pump according to claim 5, characterized in that: The first shaft section (3) and the second shaft section (4) are integrally formed.

7. The eccentric sleeve of the diaphragm pump according to claim 5, characterized in that: The cross section of the positioning groove (2) or the positioning protrusion is in the shape of a straight line.

8. The eccentric sleeve of the diaphragm pump according to claim 7, characterized in that: The width of the positioning structure is 20%-40% of the outer diameter of the second shaft segment (4); the depth of the positioning structure is 40%-60% of the axial length of the second shaft segment (4).

9. An eccentric sleeve assembly, characterized in that: The invention comprises a thrust ring (5), a gasket (6), a bearing (7), a diaphragm seat (8) and an eccentric sleeve of a diaphragm pump as claimed in any one of claims 1 to 8, wherein the bearing (7) is axially limited between the diaphragm seat (8) and the plane end (103), the inner bracket of the bearing (7) is connected to the outer peripheral surface of the eccentric sleeve of the diaphragm pump, the outer bracket of the bearing (7) is connected to the diaphragm seat (8), and the thrust ring (5), the gasket (6), the bearing (7) and the diaphragm seat (8) are axially connected and fixed in sequence.

10. A mounting structure, characterized in that: It comprises a mounting fixture (10) and the eccentric sleeve assembly (9) according to claim 9, wherein the top of the mounting fixture (10) has a groove (1001) for placing the eccentric sleeve assembly (9), and the inner bottom surface of the groove (1001) has a limiting portion (1002) that cooperates with the positioning structure, and when the positioning structure and the limiting portion (1002) are assembled, the shaft hole (101) is vertical.

11. The mounting structure according to claim 10, characterized in that: The inner bottom surface of the groove (1001) also has one or more bearing plates (1003) that abut against the end surface of the inner bracket of the bearing (7).

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