Rotary cam reversing limit mechanism and its electric dust collector scraping drive device

Abstract

The utility model discloses a rotary cam reversing limit mechanism and an electrostatic precipitator scraping drive device thereof, including a proximity switch, a driven shaft, a cam assembly, a cam assembly support, and a driving assembly. The proximity switch includes a plurality of cams, which are evenly arranged on the inner wall of one side of the cam assembly support. The driven shaft is installed on the cam assembly support with deep groove ball bearings at the top and bottom. The cam assembly is arranged in the cam assembly support through the driven shaft and is located on one side of the proximity switch. One end of the driven shaft is connected to the driving assembly. The utility model does not require high installation concentricity by directly connecting the rotary cam reversing limit mechanism to a two-stage worm reducer. It is a cam-type rotating structure, which relies on different cam rotations to open the proximity switch. The upper and lower layers of the cam mechanism adjust the relative angle to change the scraping rotation angle, thereby realizing the limit and reversing functions.

Description

Technical Field

[0001] The utility model belongs to the technical field of dust scraping devices for electric dust collectors, and in particular relates to a rotary cam reversing limiting mechanism and a dust scraping driving device for electric dust collectors. Background Art

[0002] In the scraping system of the cylindrical electrostatic precipitator, the driving device is a CWO80-20-Ⅱ reducer installed behind a two-stage worm reducer. The reducer is equipped with structural parts such as proximity switches, travel switches, proximity switch brackets, and electrical components as the reversing mechanism of the driving device; the reversing mechanism of the driving device drives the CWO80-20-Ⅱ reducer to rotate through the two-stage worm reducer, and the reversing mechanism installed on the CWO80-20-Ⅱ reducer realizes reversing through left and right reciprocating operation with the proximity switch and the travel switch, and sends signals to the two-stage worm reducer to realize the reversing function.

[0003] The reversing and limit functions of the existing CWO80-20-Ⅱ reducer proximity switch and travel switch are achieved by the joint action of electrical components and mechanical structures;

[0004] Disadvantages:

[0005] 1) The overall cost of the reversing mechanism is high and the structure is complex;

[0006] 2) The proximity switch bracket requires a stable on-site installation structure, high installation concentricity between the two-stage worm reducer and the CWO80-20-Ⅱ reducer, and high strength requirements for the coupling between the two-stage worm reducer and the CWO80-20-Ⅱ reducer.

[0007] 3) On-site debugging requires multiple adjustments of the travel switch and proximity switch to achieve the best scraping rotation angle;

[0008] 4) The dimensions of travel switches and proximity switches from different batches and manufacturers are more or less different. The hole size of the mounting bracket is fixed, and subsequent replacement may result in mismatch. Utility Model Content

[0009] In view of this, the main purpose of the utility model is to provide a rotary cam reversing limit mechanism and an electrostatic precipitator scraping drive device thereof.

[0010] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0011] Embodiment 1 of the utility model provides a rotary cam reversing limit mechanism, including a proximity switch, a driven shaft, a cam assembly, a cam assembly support, and a driving assembly. The proximity switch includes a plurality of cams that are evenly arranged on an inner wall of one side of the cam assembly support. The driven shaft is mounted on the cam assembly support with deep groove ball bearings at the top and bottom. The cam assembly is arranged in the cam assembly support through the driven shaft and is located on one side of the proximity switch. One end of the driven shaft is connected to the driving assembly.

[0012] In the above scheme, the driving assembly includes a plane gear, a driving shaft support, a driving shaft, and a cylindrical gear. The plane gear is installed at one end of the driven shaft and placed in the driving shaft support. The driving shaft is installed on the driving shaft support with deep groove ball bearings on the left and right sides. The cylindrical gear is mounted on the driving shaft and meshes with the plane gear.

[0013] In the above scheme, the cam assembly includes at least four layers of cams, each layer of cams is composed of two rubber discs sandwiching a steel arc-shaped protrusion, the upper surface of the rubber disc is engraved with angle lines, and the lower surface is attached with an angle engraved disc.

[0014] In the above solution, each layer of the cam corresponds to a proximity switch, and when each layer of the cam rotates to a preset angle of the proximity switch, the proximity switch can receive a signal and be turned on.

[0015] In the above solution, the mating portion between the driven shaft and the cam is a hexagonal structure.

[0016] Embodiment 2 of the present utility model provides an electrostatic precipitator scraping drive device, comprising the above-mentioned rotary cam reversing limit mechanism, a coupling, and a two-stage worm reducer, wherein the driving shaft of the rotary cam reversing limit mechanism is connected to the rotating shaft of the reducer through a coupling.

[0017] The above scheme also includes a reversing limit mechanism support seat, a base, and the driving shaft support of the rotary cam reversing limit mechanism is installed on the reversing limit mechanism support seat. The reversing limit mechanism support seat and the two-stage worm reducer are both arranged on the base.

[0018] Compared with the prior art, the utility model has low requirements on installation concentricity by directly connecting the rotary cam reversing limit mechanism with the two-stage worm reducer. It is a cam-type rotating structure, which relies on different cam rotations to open the proximity switch. The upper and lower cam mechanisms adjust the relative angles to change the scraping rotation angle, thereby realizing the limit and reversing functions. It is suitable for the differences in scraping angles of dust collectors of different specifications, is easy to debug and operate, has a low failure rate, a simple structure, easy inspection and maintenance, a long service life, low cost, and easy installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to disclose a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 This is a structural schematic diagram of a rotary cam reversing and limiting mechanism according to an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the cam assembly according to an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the cam described in the embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the driven shaft according to the embodiment of the utility model;

[0024] Figure 5 It is a structural schematic diagram of the scraping drive device of the electrostatic precipitator described in an embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of more restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, article or device including the element.

[0028] The utility model provides a rotary cam reversing limit mechanism. Figure 1-4 As shown, it includes a proximity switch 1, a driven shaft 2, a cam assembly 3, a cam assembly support 4, and a driving assembly. The proximity switch 1 includes a plurality of cams evenly arranged on the inner wall of one side of the cam assembly support 4. The driven shaft 2 is installed on the cam assembly support 4 with deep groove ball bearings at the top and bottom. The cam assembly 3 is arranged in the cam assembly support 4 through the driven shaft 2 and is located on one side of the proximity switch 1. One end of the driven shaft 2 is connected to the driving assembly.

[0029] In the above solution, the driven shaft 2 is mounted on the cam assembly support 4 with deep groove ball bearings at the top and bottom to ensure that the driven shaft 2 rotates stably and smoothly.

[0030] like Figure 1 As shown, the driving assembly includes a plane gear 5, a driving shaft support 6, a driving shaft 7, and a cylindrical gear 8. The plane gear 5 is installed at one end of the driven shaft 2 and placed in the driving shaft support 6. The driving shaft 7 is installed on the driving shaft support 6 with deep groove ball bearings on the left and right. The cylindrical gear 8 is mounted on the driving shaft 7 and meshes with the plane gear 5.

[0031] In the above scheme, when the driving shaft 7 rotates, the driven shaft 2 is driven to rotate through the meshing action of the cylindrical gear 8 and the flat gear 5.

[0032] like Figure 1-3 As shown, the cam assembly 3 includes at least four layers of cams 31, each layer of cams 31 is composed of two rubber discs 311 sandwiching a steel arc-shaped protrusion 312, the upper surface of the rubber disc 311 is engraved with angle lines 313, and the lower surface is attached with an angle disc 314 for accurately indicating the rotation angle.

[0033] like Figure 1-3 As shown, each layer of cam 31 corresponds to a proximity switch 1. When each layer of cam 31 rotates to a preset angle of the proximity switch 1, the proximity switch 1 can receive a signal and switch on, thereby achieving precise control of the rotation angle of the driven shaft 2.

[0034] like Figure 1-4 As shown, the mating portion between the driven shaft 2 and the cam 31 is a hexagonal structure. This structural design enhances the connection stability between the driven shaft 2 and the cam 31 and improves the motion accuracy of the entire mechanism.

[0035] The utility model provides a second embodiment of an electrostatic precipitator scraping drive device, such as Figure 5As shown, it includes the above-mentioned rotary cam reversing limit mechanism, coupling 10, and two-stage worm reducer 12. The driving shaft 7 of the rotary cam reversing limit mechanism is connected to the rotating shaft 13 of the two-stage worm reducer 12 through the coupling 10 to ensure stable power transmission.

[0036] like Figure 5 As shown, it also includes a reversing limit mechanism support seat 9, a base 11, and the driving shaft support 6 of the rotary cam reversing limit mechanism is installed on the reversing limit mechanism support seat 9. The reversing limit mechanism support seat 9 and the two-stage worm reducer 12 are both arranged on the base 11 to ensure the structural stability and installation convenience of the entire device.

[0037] The working process of this utility model:

[0038] like Figure 1-5 As shown, in actual application of the utility model, when the dust scraping drive device of the electrostatic precipitator is working, the two-stage worm reducer 12 drives the rotating shaft 13 to rotate, and transmits the power to the driven shaft 2 of the rotary cam reversing and limiting mechanism through the coupling 10. The driven shaft 2 drives the cam assembly 3 to rotate, and when the cam 31 rotates to the preset angle of the proximity switch 1, the proximity switch 1 receives the signal and is turned on, so as to realize the precise reversing and limiting of the dust scraping device.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A rotary cam reversing limit mechanism, characterized in that: It includes a proximity switch, a driven shaft, a cam assembly, a cam assembly support, and a driving assembly. The proximity switch includes a plurality of cams that are evenly arranged on an inner wall of one side of the cam assembly support. The driven shaft is mounted on the cam assembly support with deep groove ball bearings at the top and bottom. The cam assembly is arranged in the cam assembly support through the driven shaft and is located on one side of the proximity switch. One end of the driven shaft is connected to the driving assembly.

2. The rotary cam reversing and limiting mechanism according to claim 1, characterized in that: The driving assembly includes a plane gear, a driving shaft support, a driving shaft, and a cylindrical gear. The plane gear is installed at one end of the driven shaft and placed in the driving shaft support. The driving shaft is installed on the driving shaft support with deep groove ball bearings on the left and right sides. The cylindrical gear is mounted on the driving shaft and meshes with the plane gear.

3. The rotary cam reversing and limiting mechanism according to claim 2, characterized in that: The cam assembly comprises at least four layers of cams, each layer of cams is composed of two rubber discs sandwiching a steel arc-shaped protrusion, the upper surface of the rubber disc is engraved with angle lines, and the lower surface is attached with an angle engraved disc.

4. The rotary cam reversing and limiting mechanism according to claim 3, characterized in that: Each layer of the cam corresponds to a proximity switch. When each layer of the cam rotates to a preset angle of the proximity switch, the proximity switch can receive a signal and be turned on.

5. The rotary cam reversing and limiting mechanism according to claim 4, characterized in that: The matching portion between the driven shaft and the cam is in a hexagonal structure.

6. An electrostatic precipitator scraping drive device, characterized in that: It comprises a rotary cam reversing limit mechanism, a coupling, and a two-stage worm reducer as described in any one of claims 1 to 5, wherein the driving shaft of the rotary cam reversing limit mechanism is connected to the rotating shaft of the two-stage worm reducer through the coupling.

7. The electric dust collector scraping drive device according to claim 6, characterized in that: It also includes a reversing limit mechanism support seat, a base, and a driving shaft support of the rotary cam reversing limit mechanism installed on the reversing limit mechanism support seat. The reversing limit mechanism support seat and the two-stage worm reducer are both arranged on the base.

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