Device for detecting inner diameter of part

Abstract

The utility model belongs to the technical field of part inspection, and discloses a part inner diameter detection device. The device comprises a frame, a lifting assembly is installed in the frame, a detection shaft is installed on the upper side of the frame, a tray is installed on the lifting assembly, a shell is placed on the tray, a first through hole is formed in the tray, the detection shaft is installed in the first through hole, and the lifting assembly drives the tray to move along the axis of the detection shaft and drives an inner cavity of the shell to be arranged outside the detection shaft in a sleeving mode; the detection shaft comprises a sliding section and a stopping section, the sliding section is smaller than the standard diameter of the shell, and the stopping section is larger than the standard diameter of the shell; the problems that in the prior art, manual detection of the diameter of the inner cavity of the shell is low in efficiency and large in error are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of parts inspection, in particular to a parts inner diameter detection device. Background Art

[0002] The compressor includes multiple groups of parts with different functions, among which the outer shell of the compressor is more difficult to process. The inner cavity of the shell forms a circular cavity, and an iron core is placed in the circular cavity. The inner diameter of the circular center cavity is the standard diameter, but due to processing errors, the actual processing diameter of the circular cavity is larger than the standard diameter, which will cause the gap between the iron core and the circular cavity to be too large. When the compressor is working, the efficiency of the compressor is low and the noise is too loud, which affects normal use. In order to enable the compressor to work normally, it is necessary to manually use measuring tools to detect the diameter of the circular cavity in the compressor. However, the efficiency of manual detection is low, and it cannot guarantee that all areas in the circular cavity meet the standards. In addition, the error is large, and unqualified shells will still pass the inspection, resulting in a high failure rate of compressors made of the above shells. Utility Model Content

[0003] The utility model aims to provide a device for detecting the inner diameter of a part, so as to solve the problem that the efficiency is low and the error is large in the manual detection of the inner diameter of a shell in the prior art.

[0004] To achieve this object, the utility model adopts the following technical scheme: the utility model provides a part inner diameter detection device, including a frame, a lifting assembly is installed in the frame, a detection shaft is installed on the upper side of the frame, a tray is installed on the lifting assembly, a shell is placed on the tray, a first through hole is formed on the tray, the detection shaft is installed in the first through hole, the lifting assembly drives the tray to move along the axis of the detection shaft, and drives the inner cavity of the shell to be mounted outside the detection shaft; the detection shaft includes a sliding section and a stop section, the sliding section is smaller than the standard diameter of the shell, and the stop section is larger than the standard diameter of the shell.

[0005] Preferably, the lifting assembly comprises a cylinder, a lifting rod is formed in the cylinder, the cylinder pushes the lifting rod to reciprocate along the axis of the detection shaft, and the lifting rod is connected to the tray.

[0006] Preferably, a connecting plate is installed on the lifting rod, and the connecting plate is connected to the tray via a connecting shaft. A linear bearing is installed on the upper side of the frame, and the connecting shaft is inserted into the linear bearing.

[0007] Preferably, a second through hole is formed on the connecting plate, a first screw hole is formed on one end of the connecting shaft close to the connecting plate, and a first bolt passes through the second through hole and is screwed into the first screw hole.

[0008] Preferably, a third through hole is formed on the tray, a second screw hole is formed at one end of the connecting shaft close to the tray, and a second bolt passes through the third through hole and is screwed into the second screw hole.

[0009] Preferably, the part inner diameter detection device also includes a photoelectric sensor and an alarm, the photoelectric sensor and the alarm are electrically connected, the detection end of the photoelectric sensor is arranged in the stop section, when the tray drives the shell to reach the first set position of the stop section, the photoelectric sensor sends a signal to the alarm, and the alarm can emit an audible and visual alarm.

[0010] Preferably, the lower end of the detection shaft is inserted into a plate on the upper side of the frame.

[0011] Preferably, the axial length of the sliding section is not less than the axial length of the housing.

[0012] Preferably, the photoelectric sensor is further provided corresponding to the sliding section, and when the tray drives the shell to fail to reach the second set position on the sliding section, the photoelectric sensor sends an alarm signal.

[0013] Beneficial effect: by placing the shell on a pallet and inserting the cavity of the shell into the upper end of the detection axis, the pallet drives the shell to move downward. If the shell cannot move freely in the sliding section, the actual diameter of the shell is too small and the size of the shell inner cavity is unqualified. If the shell can move freely in the sliding section, the actual processing of the shell meets the minimum standard of the standard diameter. The pallet continues to drive the shell to move downward. If the shell can move freely in the stop section, the processing diameter of the shell inner cavity is too large. If the shell cannot move in the stop section, it means that the shell processing is qualified at this time. The shell on the pallet is automatically driven to move once along the detection axis by the lifting assembly, and the diameter of the shell inner cavity is measured by the detection axis. The steps are simpler, avoiding the error caused by manual direct measurement of the shell inner diameter, so that unqualified shells can be quickly screened out, saving labor costs, and increasing detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of a device for detecting inner diameter of parts of the utility model.

[0015] In the figure: 1. frame; 2. cylinder; 3. connecting shaft; 4. tray; 5. linear bearing; 6. connecting plate; 7. detection shaft; 71. sliding section; 72. stop section; 8. photoelectric sensor. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0017] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0019] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0020] Under the existing technology, the inner cavity diameter of the shell is detected manually using a measuring tool, which may result in errors and has low detection efficiency and cannot cope with large-scale production.

[0021] In order to solve the above problems, Figure 1As shown, the utility model provides a device for detecting the inner diameter of a part, including a frame 1, a lifting assembly installed in the frame 1, a detection shaft 7 installed on the upper side of the frame 1, a tray 4 installed on the lifting assembly, a shell placed on the tray 4, a first through hole formed on the tray 4, the detection shaft 7 installed in the first through hole, the lifting assembly drives the tray 4 to move along the axis of the detection shaft 7, and drives the inner cavity of the shell to be sleeved outside the detection shaft 7; the detection shaft 7 includes a sliding section 71 and a stop section 72, the sliding section 71 is smaller than the standard diameter of the shell, and the stop section 72 is larger than the standard diameter of the shell. It should be particularly noted that the standard diameter needs to be calibrated in combination with the processing tolerance, so the standard diameter is a range value, the diameter of the sliding section 71 is slightly smaller than or equal to the minimum value of the standard diameter, and the diameter of the stop section 72 is slightly larger than or equal to the maximum value of the standard diameter.

[0022] The shell is placed on the tray 4, which is higher than the detection axis 7 at this time, so that the axis of the circular inner cavity of the shell coincides with the detection axis 7, and the lifting assembly drives the tray 4 to move downward. The tray 4 drives the shell to pass through the sliding section 71 first. If the shell cannot move freely in the sliding section 71, the actual diameter of the shell is too small, and the size of the shell inner cavity is unqualified. If the shell can move freely in the sliding section 71, the actual processing of the shell meets the minimum standard of the standard diameter. The tray 4 continues to drive the shell to move downward. If the shell can move freely in the stop section 72, the processing diameter of the shell inner cavity is too large, and the shell inner diameter is unqualified. If the shell cannot move in the stop section 72, it means that the shell inner diameter processing is qualified at this time. The utility model drives the shell to move downward automatically by the tray 4, and intuitively judges whether the shell is processed and qualified by whether the shell can pass through the sliding section 71 and the stop section 72. There is no need to manually measure the diameter, which saves labor costs. At the same time, because the tray 4 drives the shell to descend once, it can detect whether the shell is processed and qualified, which can improve the detection efficiency, so that the utility model can cope with large-scale production.

[0023] Since the axial length of the sliding section 71 of the utility model is not less than the axial length of the circular inner cavity of the shell, when the sliding section 71 is inserted into the inner cavity of the shell, the sliding section 71 can detect whether the diameters of all positions on the axial direction of the inner cavity meet the requirements, thereby improving the detection accuracy, reducing the error of the inner diameter detection device of the parts of the utility model, and improving the yield rate of the shell.

[0024] The lifting assembly includes a cylinder 2 , in which a lifting rod is formed. The cylinder 2 pushes the lifting rod to reciprocate along the axis of the detection shaft 7 , and the lifting rod is connected to the tray 4 .

[0025] The lifting rod drives the tray 4 to move along the axis of the detection shaft 7. The cooperation between the cylinder 2 and the lifting rod can make the movement of the tray 4 more stable, improve the accuracy of the final detection of the inner cavity diameter of the shell, and avoid the shell not coinciding with the axis of the detection shaft 7 during the movement.

[0026] A connecting plate 6 is installed on the lifting rod, and the connecting plate 6 is connected to the tray 4 through the connecting shaft 3. A linear bearing 5 is installed on the upper side of the frame 1, and the connecting shaft 3 is inserted into the linear bearing 5.

[0027] By providing the linear bearing 5, the connecting shaft 3 can move more smoothly, the resistance encountered by the cylinder 2 during operation can be reduced, a low-power cylinder 2 can be used, and the manufacturing cost of the part inner diameter detection device can be reduced.

[0028] The connecting plate 6 of the utility model is formed with a second through hole, and the end of the connecting shaft 3 close to the connecting plate 6 is formed with a first screw hole, and the first bolt passes through the second through hole and is screwed into the first screw hole. The tray 4 is formed with a third through hole, and the end of the connecting shaft 3 close to the tray 4 is formed with a second screw hole, and the second bolt passes through the third through hole and is screwed into the second screw hole.

[0029] The two ends of the connecting shaft 3 are respectively connected to the connecting plate 6 and the tray 4 by the first bolt and the second bolt, which is convenient for workers to disassemble and repair. It is also convenient to replace the trays 4 of different areas, so that the tray 4 can support a larger volume of the shell, making the part inner diameter detection device of the utility model more versatile.

[0030] The part inner diameter detection device of the utility model also includes a photoelectric sensor 8 and an alarm, which are electrically connected. The detection end of the photoelectric sensor 8 is arranged on the side of the stop section 72 close to the sliding section 71. When the tray 4 drives the shell to reach the stop section 72, the photoelectric sensor 8 sends a signal to the alarm, and the alarm can emit an audible and visual alarm.

[0031] When the inner diameter of the shell is qualified and the tray 4 moves to the stop section 72, the shell cannot move downward. At this time, the detection end cannot detect that there is an object passing through the upper side of the tray 4, and the alarm does not sound; when the inner diameter of the shell is larger, the shell will move to the stop section 72 with the tray 4, and the detection end will detect that there is an object on the tray 4 at the first set position, and the alarm will sound an alarm. A group of photoelectric sensors 8 can also be set on the upper side of the sliding section 71. If it is detected that the shell cannot enter the sliding section 71, that is, the shell cannot enter the second set position, an alarm signal will be sent to the alarm; the photoelectric sensor 8 and alarm used in the utility model are prior art and are not described here.

[0032] The lower end of the detection shaft 7 of the present invention is inserted into the first through hole on the plate on the upper side of the frame 1. The present invention can replace detection shafts 7 of different diameters to adapt to different inner diameters of the housing, making the present invention more adaptable.

[0033] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A device for detecting inner diameter of a part, characterized in that: The invention comprises a frame (1), a lifting assembly is installed in the frame (1), a detection shaft (7) is installed on the upper side of the frame (1), a tray (4) is installed on the lifting assembly, a shell is placed on the tray (4), a first through hole is formed on the tray (4), the detection shaft (7) is installed in the first through hole, and the lifting assembly drives the tray (4) to move along the axis of the detection shaft (7), thereby driving the inner cavity of the shell to be sleeved outside the detection shaft (7); The detection shaft (7) comprises a sliding section (71) and a stop section (72); the sliding section (71) is smaller than the standard diameter of the housing, and the stop section (72) is larger than the standard diameter of the housing.

2. The part inner diameter detection device according to claim 1, characterized in that: The lifting assembly comprises a cylinder (2), a lifting rod is formed inside the cylinder (2), the cylinder (2) pushes the lifting rod to move back and forth along the axis of the detection shaft (7), and the lifting rod is connected to the tray (4).

3. The part inner diameter detection device according to claim 2, characterized in that: A connecting plate (6) is installed on the lifting rod, and the connecting plate (6) is connected to the tray (4) via a connecting shaft (3). A linear bearing (5) is installed on the upper side of the frame (1), and the connecting shaft (3) is inserted into the linear bearing (5).

4. The part inner diameter detection device according to claim 3, characterized in that: A second through hole is formed on the connecting plate (6), and a first screw hole is formed at one end of the connecting shaft (3) close to the connecting plate (6); a first bolt passes through the second through hole and is screwed into the first screw hole.

5. The part inner diameter detection device according to claim 3, characterized in that: A third through hole is formed on the tray (4), a second screw hole is formed at one end of the connecting shaft (3) close to the tray (4), and a second bolt passes through the third through hole and is screwed into the second screw hole.

6. The part inner diameter detection device according to claim 1, characterized in that: The part inner diameter detection device also includes a photoelectric sensor (8) and an alarm, wherein the photoelectric sensor (8) and the alarm are electrically connected, and a detection end of the photoelectric sensor (8) is arranged at the stop section (72). When the tray (4) drives the shell to reach a first set position of the stop section (72), the photoelectric sensor (8) sends a signal to the alarm, and the alarm can emit an audible and visual alarm.

7. The part inner diameter detection device according to claim 1, characterized in that: The lower end of the detection shaft (7) is inserted into the plate on the upper side of the frame (1).

8. The part inner diameter detection device according to claim 1, characterized in that: The axial length of the sliding section (71) is not less than the axial length of the housing.

9. The part inner diameter detection device according to claim 6, characterized in that: The photoelectric sensor (8) is also provided corresponding to the sliding section (71), and when the tray (4) drives the shell to fail to reach the second set position on the sliding section (71), the photoelectric sensor (8) sends an alarm signal.

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