Device for detecting diameter of piston rod of oil-free gas compressor

Abstract

The utility model discloses a device for detecting the diameter of a piston rod of an oil-free gas compressor, which relates to the technical field of diameter detection equipment and comprises a square frame, a fixed roller, a movable roller, a pair of limiting rods, a pair of extension springs, a transverse plate, a rack, a gear and a working box. A pair of limiting holes are formed in the side, correspondingly away from the fixed roller, of the frame, a pair of limiting rods movably penetrate through the limiting holes, the inner ends of the pair of limiting rods are rotationally connected with the two ends of the movable roller, and the outer ends of the pair of limiting rods are connected with the side wall of the transverse plate; the piston rod is clamped between the movable roller and the fixed roller, a worker holds the handle by hand to enable the two rollers to roll at any position on the piston rod and observe the scale change, the scale change is the opening distance of the movable roller and the fixed roller, namely the diameter of the piston rod, and the worker can easily, quickly and conveniently measure the piston rod in a rolling manner on the piston rod, and the measurement efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of diameter detection equipment, in particular to a diameter detection device for a piston rod of an oil-free gas compressor. Background Art

[0002] The piston rod of an oil-free gas compressor is a connecting component that supports the piston to do work. It is a moving component that moves frequently and has high technical requirements. The quality of the piston rod production will affect the working state of the entire compressor. Therefore, during the production process of the piston rod, its various data must be strictly tested, and one of the important data is its diameter.

[0003] Existing piston rod diameter detection generally uses a diameter detector and a micrometer or a vernier caliper. The diameter detector is generally used after the finished product to strictly control the product quality and has high precision; the micrometer or vernier caliper is a manual measuring device, generally used in semi-finished products or finished products, and is measured manually.

[0004] However, when using a micrometer or vernier caliper, measurements should be taken at different positions (at least three points) around the circumference of the piston rod, and the average value should be calculated to reduce the error. However, this multi-point and circumferential measurement method has low work efficiency and high labor intensity. Therefore, it is necessary to find a diameter detection device that is convenient for personnel to measure manually. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the utility model provides a device for detecting the diameter of the piston rod of an oil-free gas compressor. The piston rod is clamped between a movable roller and a fixed roller. A person holds a handle to roll the two rollers at any position on the piston rod and observes the scale change. The scale change is the distance between the movable roller and the fixed roller, that is, the diameter of the piston rod. The method of rolling measurement on the piston rod is easy, fast and convenient for personnel and has high measurement efficiency.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions: a device for detecting the diameter of a piston rod of an oil-free gas compressor, comprising a square frame, a fixed roller, a movable roller, a pair of limit rods, a pair of tension springs, a transverse plate, a rack, a gear and a working box, wherein the fixed roller is rotatably arranged on one side of the inner part of the frame, a pair of limit holes are opened on the side of the frame corresponding to the side away from the fixed roller, a pair of limit rods are movably inserted into the limit holes, one end of the inner side of the pair of limit rods is rotatably connected to the two ends of the movable roller, and one end of the outer side is connected to the side wall of the transverse plate, a pair of tension springs are sleeved on the limit rods, and one end is connected to the outer wall of the frame. The rack is connected to the side wall of the horizontal plate, and the other end is connected to the side wall of the horizontal plate. One end of the rack is fixedly connected to one end of the horizontal plate and is perpendicular to each other. The working box is arranged on the outer wall of the frame. A sliding opening is provided at the position of the working box corresponding to the rack. The rack passes through the sliding opening to the inside of the working box. The gear is arranged at the center position inside the working box by rotating on a rotating shaft fixed thereto. The rack is meshed with the gear. The rotating shaft passes through the surface of the working box and is connected with a pointer. A dial is provided on the surface of the working box corresponding to the rotation area of ​​the pointer, and a circle of the dial is provided with scales representing the distance. A handle is provided on the outside of the frame corresponding to the side away from the horizontal plate.

[0007] Preferably, the end of the transverse plate corresponding to the end away from the rack is connected with a connecting plate, and a gripping plate is arranged outside the connecting plate.

[0008] Preferably, both ends of the movable roller are slidably connected to the inner side of the frame through a sliding member, and the movable roller is rotationally connected to the movable end of the sliding member; the rack is slidably connected to the inner wall of the working box through a sliding member; the connecting plate is slidably connected to the outer wall of the frame through a sliding member.

[0009] Preferably, the sliding member is a slider and a slide groove sliding assembly.

[0010] Preferably, the outer cover of the tension spring is provided with a soft protective cover.

[0011] Preferably, a rubber sleeve is provided on the outside of the handle.

[0012] The utility model provides a device for detecting the diameter of a piston rod of an oil-free gas compressor, which has the following beneficial effects:

[0013] 1. The utility model clamps the piston rod between the movable roller and the fixed roller. The personnel hold the handle to roll the two rollers at any position on the piston rod and observe the scale change. The scale change is the distance between the movable roller and the fixed roller, that is, the diameter of the piston rod. The method of rolling measurement on the piston rod is easy, fast and convenient, and has high measurement efficiency.

[0014] 2. The sliding parts in the utility model include sliding grooves and sliding blocks to ensure the relative stability of the components and improve the measurement accuracy; a protective cover is arranged on the outside of the tension spring to protect the spring and improve the service life; a connecting plate and a gripping plate are arranged on the other end of the horizontal plate to open the movable roller and the fixed roller, and can also be used to keep them fixed when checking the scale, so that the checking is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top cross-sectional view of the utility model;

[0016] Figure 2 It is a schematic diagram of the dial of the utility model.

[0017] In the figure: 1. rubber sleeve; 2. handle; 3. fixed roller; 4. frame; 5. working box; 6. rack; 7. rotating shaft; 8. sliding part; 9. gear; 10. sliding mouth; 11. horizontal plate; 12. protective cover; 13. movable roller; 14. tension spring; 15. limit rod; 16. limit hole; 17. grip plate; 18. connecting plate; 19. dial; 20. scale; 21. pointer. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1-2As shown, a piston rod diameter detection device for an oil-free gas compressor comprises a square frame 4, a fixed roller 3, a movable roller 13, a pair of limiting rods 15, a pair of tension springs 14, a transverse plate 11, a rack 6, a gear 9 and a working box 5, wherein the fixed roller 3 is rotatably arranged on one side of the inner part of the frame 4, a pair of limiting holes 16 are provided on the side of the frame 4 corresponding to the side away from the fixed roller 3, a pair of limiting rods 15 movably penetrate the limiting holes 16, an inner end of the pair of limiting rods 15 is rotatably connected to the two ends of the movable roller 13, and an outer end is connected to the side wall of the transverse plate 11, a pair of tension springs 14 are sleeved on the limiting rods 15, and one end is connected to the outer wall of the frame 4, and the other end is connected to the side wall of the transverse plate 11, one end of the rack 6 is fixedly connected to one end of the transverse plate 11 and is perpendicular to each other, the working box 5 is arranged on the outer wall of the frame 4, a sliding opening 10 is provided on the position of the working box 5 corresponding to the rack 6, the rack 6 penetrates the sliding opening 10 to the inside of the working box 5, and the gear 9 rotates through the rotating shaft 7 fixed thereto The movable roller 13 is arranged at the central position inside the working box 5, the rack 6 is meshed with the gear 9, the rotating shaft 7 passes through the surface of the working box 5 and is connected with a pointer 21, and a dial 19 is arranged on the surface of the working box 5 corresponding to the rotation area of ​​the pointer 21, and a scale 20 representing the distance is arranged around the dial 19; a handle 2 is arranged on the side of the outside of the frame 4 corresponding to the side away from the horizontal plate 11; a connecting plate 18 is connected to the end of the horizontal plate 11 corresponding to the side away from the rack 6, and a grip plate 17 is arranged on the outside of the connecting plate 18; both ends of the movable roller 13 are slidably connected to the inner side of the frame 4 through a sliding member 8, and the movable roller 13 is rotatably connected to the moving end of the sliding member 8; the rack 6 is slidably connected to the inner wall of the working box 5 through the sliding member 8; the connecting plate 18 is slidably connected to the outer wall of the frame 4 through the sliding member 8; the sliding member 8 is a slider and a slide groove sliding assembly; the outer sleeve of the tension spring 14 is provided with a soft protective cover 12; the outer side of the handle 2 is provided with a rubber cover 1.

[0020] The detailed connection means are well-known in the art. The following mainly introduces the working principle and process, which are as follows:

[0021] According to the instruction manual Figure 1-2It can be known that when the utility model is working, the personnel manually move the movable roller 13, increase the distance between the movable roller 13 and the fixed roller, and put it on the piston rod to be measured. When the movable roller 13 is moved, the movable roller 13 pushes the limit rod 15, the cross plate 11 and the rack 6 to move. Since the rack 6 penetrates into the working box 5 and is meshed with the gear 9, and the gear 9 is rotatably connected to the working box 5 through the rotating shaft 7, the movement of the rack 6 drives the gear 9 and the rotating shaft 7 fixedly connected thereto to rotate. Since the rotating shaft 7 penetrates the workbench and is connected with the pointer 21, the workbench corresponds to the pointer A dial 19 is provided at the working range of 21, and a scale 20 representing the distance is provided on the dial 19, that is, when the movable roller 13 moves, the pointer 21 will be driven to rotate, and when the piston rod is sandwiched between the movable roller 13 and the fixed roller 3, the distance between the movable roller 13 and the fixed roller 3 is the diameter of the piston rod. At this time, the pointer 21 points to a certain scale 20. Since the change in the movement of the rack 6 is proportional to the change in the rotation of the gear 9, the personnel can set the scale 20 on the dial 19 according to the change in the movable roller 13, and the scale 20 represents the distance. Since the manual measuring device needs to be measured at different positions, at this time, one hand can hold the piston rod and keep it still, and the other hand can hold the handle 2 and move along the axis of the piston rod. Under the action of the tension spring 14 between the frame 4 and the horizontal plate 11 on the limit rod 15, the movable rod tends to clamp to the side of the fixed rod, and the distance between the movable roller 13 and the fixed roller 3 will change with the diameter of the piston rod, so that it can stay at any position, observe the scale 20 of the dial 19, and record the diameter. Since the two ends of the movable roller 13 are rotatably connected with the limit rod 15, and the fixed roller 3 is rotatably connected with the inner wall of the frame 4, it is labor-saving to roll on the piston rod, and there is no need to disassemble to measure other positions. Compared with the manual clamping of the micrometer or vernier caliper and the removal and re-selection of the position clamping, it is much easier, quicker and more convenient, and has high measurement efficiency. The sliding limit of the limit rod 15 and the limit hole 16 ensures the stability of the movement of the movable roller 13, and the sliding limit of the rack 6 and the sliding mouth 10 ensures the stability of the movement of the rack 6.

[0022] Among them, the end of the horizontal plate 11 corresponding to the end away from the rack 6 is connected with a connecting plate 18, and a grip plate 17 is arranged outside the connecting plate 18 for opening the movable roller 13 and the fixed roller 3, and can also be used to keep them fixed when checking the scale 20, so that the checking is more accurate.

[0023] Among them, the two ends of the movable roller 13 are slidably connected to the inner side of the frame 4 through the sliding member 8, and the movable roller 13 is rotatably connected to the moving end of the sliding member 8; the rack 6 is slidably connected to the inner wall of the working box 5 through the sliding member 8; the connecting plate 18 is slidably connected to the outer wall of the frame 4 through the sliding member 8. The sliding frame ensures the stability of the moving parts in the device, and the sliding member 8 can be a sliding assembly in which a slider and a slide groove cooperate. Here, the two ends of the movable roller 13 need to be rotatably connected to the surface of the slider.

[0024] Among them, the outer sleeve of the tension spring 14 is provided with a soft protective sleeve 12 to protect the spring and increase the service life; the outer side of the handle 2 is provided with a rubber sleeve 1 to facilitate people to hold it.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the diameter of a piston rod of an oil-free gas compressor, characterized in that: The invention comprises a square frame (4), a fixed roller (3), a movable roller (13), a pair of limiting rods (15), a pair of tension springs (14), a transverse plate (11), a rack (6), a gear (9) and a working box (5); the fixed roller (3) is rotatably arranged on one side of the inner part of the frame (4); a pair of limiting holes (16) are opened on the side of the frame (4) corresponding to the side away from the fixed roller (3); a pair of limiting rods (15) are movably inserted into the limiting holes (16); one end of the inner side of the pair of limiting rods (15) is rotatably connected to the two ends of the movable roller (13); one end of the outer side is connected to the side wall of the transverse plate (11); a pair of tension springs (14) are sleeved on the limiting rods (15); one end of the pair of tension springs is connected to the outer wall of the frame (4) and the other end is connected to the side wall of the transverse plate (11); one end of the rack (6) is connected to the transverse plate (11); The plate (11) is fixedly connected at one end and is perpendicular to each other. The working box (5) is arranged on the outer wall of the frame (4). A sliding opening (10) is opened at a position of the working box (5) corresponding to the rack (6). The rack (6) passes through the sliding opening (10) to the inside of the working box (5). The gear (9) is arranged at the center position of the working box (5) by rotating on a rotating shaft (7) fixed thereto. The rack (6) is meshedly connected with the gear (9). The rotating shaft (7) passes through the surface of the working box (5) and is connected with a pointer (21). A dial (19) is arranged on the surface of the working box (5) corresponding to the rotation area of ​​the pointer (21). A scale (20) representing the distance is arranged around the dial (19). A handle (2) is arranged on the side of the outside of the frame (4) corresponding to the side away from the horizontal plate (11).

2. The oil-free gas compressor piston rod diameter detection device according to claim 1, characterized in that: The end of the transverse plate (11) corresponding to the end away from the rack (6) is connected to a connecting plate (18), and a gripping plate (17) is arranged outside the connecting plate (18).

3. The oil-free gas compressor piston rod diameter detection device according to claim 2, characterized in that: The two ends of the movable roller (13) are slidably connected to the inner side of the frame (4) via a sliding member (8), and the movable roller (13) is rotationally connected to the movable end of the sliding member (8); the rack (6) is slidably connected to the inner wall of the working box (5) via the sliding member (8); and the connecting plate (18) is slidably connected to the outer wall of the frame (4) via the sliding member (8).

4. The oil-free gas compressor piston rod diameter detection device according to claim 3, characterized in that: The sliding member (8) is a sliding block and a sliding groove sliding assembly.

5. The oil-free gas compressor piston rod diameter detection device according to claim 1, characterized in that: The outer cover of the tension spring (14) is provided with a soft protective cover (12).

6. The oil-free gas compressor piston rod diameter detection device according to claim 1, characterized in that: A rubber sleeve (1) is arranged outside the handle (2).

Images