Detection device

Abstract

The utility model relates to the technical field of detection tools, in particular to a detection device. The device comprises a base, a fixing rod, a supporting frame, a first dial indicator and a limiting assembly. The fixing rod is arranged on the surface of the base, the supporting frame is arranged on the fixing rod and can slide in the first direction, the first direction is the height direction of the fixing rod, and the first dial indicator is installed on the supporting frame; the limiting assembly comprises a first limiting piece and a second limiting piece which are oppositely arranged in the first direction, the first limiting piece is arranged on the supporting frame and can move relative to the supporting frame in the first direction, the second limiting piece is arranged on the base, the first limiting piece is provided with a first limiting part used for being matched with one end of a to-be-tested piece, and the second limiting piece is provided with a second limiting part. The second limiting part is used for being matched with the other end of the to-be-measured piece, so that a space for accommodating the to-be-measured piece is formed between the first limiting piece and the second limiting piece, and the surface, deviating from the to-be-measured piece, of the first limiting piece is in contact with a measuring head of the first dial indicator. The device is simple to operate and suitable for large-scale detection tasks.

Description

Technical Field

[0001] This application relates to the technical field of inspection tools, and particularly to a detection device. Background Art

[0002] The valve push rod is an important component in the valve train. It is located between the tappet and the rocker arm and undertakes the function of transmitting the force conducted by the tappet to the rocker arm, thereby driving the opening and closing of the valve. If there is a problem with the valve push rod, it will inevitably affect the opening and closing of the valves in each cylinder, resulting in the intake of fresh air and the exhaust of waste gas not being carried out as required, thus affecting the working state of the engine.

[0003] Among them, the rod body of the valve push rod is usually made of cold-drawn seamless steel pipe, and then ball heads and ball seats are welded to both ends of the rod body to form the valve push rod to ensure its mechanical properties. For components with a specific structure similar to the valve push rod, it is impossible to directly measure its size and the runout of the rod body using conventional measuring tools. Although the coordinate measuring method can be used for detection, the operation is complex, the detection cycle is long, and the cost is high, which is not suitable for performing large-scale inspection tasks. Utility Model Content

[0004] This application discloses a detection device to solve the problem that existing measuring tools cannot directly measure the size of components with a specific structure or are not suitable for large-scale inspection tasks.

[0005] To achieve the above object, this application provides the following technical solutions:

[0006] In a first aspect, this application provides a detection device, which includes a base, a fixed rod, a support frame, a first dial indicator, and a limiting component. Among them, the fixed rod is arranged on the surface of the base, the support frame is arranged on the fixed rod and can slide along a first direction, the first direction is the height direction of the fixed rod, and the first dial indicator is installed on the support frame; the limiting component includes a first limiting member and a second limiting member arranged oppositely along the first direction. The first limiting member is arranged on the support frame and can move relative to the support frame along the first direction. The second limiting member is arranged on the base. One side of the first limiting member facing the second limiting member has a first limiting portion, and the first limiting portion is used to match one end of the component to be measured. One side of the second limiting member facing the first limiting member has a second limiting portion, and the second limiting portion is used to match the other end of the component to be measured, so as to form a space for accommodating the component to be measured between the first limiting member and the second limiting member. The surface of the first limiting member facing away from the component to be measured is in contact with the measuring head of the first dial indicator.

[0007] The detection device provided by the present application, wherein the first limiting portion matches one end of the component to be measured, and the second limiting portion matches the other end of the component to be measured. Therefore, a space for accommodating the component to be measured is formed between the first limiting member and the second limiting member, and the component to be measured can be stably fixed. During use, first adjust the support frame relative to the fixed rod along the first direction to a suitable position according to the height of the standard component, place the standard component between the first limiting member and the second limiting member, and calibrate the first dial indicator to zero; after removing the standard component, place the component to be measured between the first limiting member and the second limiting member, record the reading value B of the first dial indicator, and the length of the component to be measured is equal to the sum of the length H of the standard component and the reading value B. The detection device in the present application can simply obtain the length of the component to be measured, has simple operation, and is suitable for large-scale detection tasks.

[0008] Further, the first limiting member includes a first base and a first limiting portion provided on the surface of the first base, and the first limiting portion is a convex structure; and / or, the second limiting portion is a groove structure.

[0009] Further, the convex structure includes N stacked protrusions, and along the protruding direction of the convex structure, the radial dimensions of the N protrusions gradually decrease to form a stepped structure, where N is a positive integer greater than or equal to 2.

[0010] Further, the inner wall of the groove structure is provided with M annular stepped structures to form (M + 1) annular grooves, and along the direction from the bottom of the groove structure to the opening of the groove structure, the inner diameters of the (M + 1) annular grooves gradually increase, where M is a positive integer greater than or equal to 1.

[0011] Further, the support frame includes a first support plate and a second support plate arranged at intervals; the first dial indicator is provided on the first support plate, and the measuring rod of the first dial indicator faces the second support plate. The second support plate is provided with a first through hole. The first base is located on the side of the second support plate facing the first support plate, and the convex structure extends into the first through hole. The inner diameter of the first through hole is smaller than the outer diameter of the first base.

[0012] Further, the detection device further includes a compression spring sleeved on the measuring rod of the first dial indicator. One end of the compression spring abuts against the first support plate, and the other end of the compression spring abuts against the first limiting member.

[0013] Further, the first limiting member is slidably connected to the support frame through a sliding component; wherein, the sliding component includes a slide rail extending along the first direction and a slider cooperating with the slide rail. The slide rail is provided on the support frame, and the slider is provided on the first limiting member.

[0014] Further, the detection device further includes a first baffle and a second baffle. The first baffle is provided at one end of the slide rail, and the second baffle is provided at the other end of the slide rail.

[0015] Further, the detection device further includes a dial gauge stand disposed on the base and a second dial indicator mounted on the dial gauge stand. The probe of the second dial indicator is used to contact the rod body of the workpiece to be measured to detect the runout of the workpiece to be measured. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of a detection device according to an embodiment of the present application;

[0017] Figure 2 is a schematic structural diagram of a first limiting member according to an embodiment of the present application;

[0018] Figure 3 is a schematic structural diagram of a second limiting member according to an embodiment of the present application;

[0019] Figure 4 is a schematic structural diagram of a detection device according to another embodiment of the present application;

[0020] Figure 5 is a schematic structural diagram of a detection device according to still another embodiment of the present application.

[0021] Reference numerals in the drawings: 100 - base; 200 - fixing rod; 300 - support frame; 310 - first support plate; 320 - second support plate; 330 - connecting plate; 400 - first dial indicator; 500 - limiting assembly; 510 - first limiting member; 511 - first limiting portion; 511a - protruding portion; 512 - first base; 520 - second limiting member; 521 - second limiting portion; 600 - compression spring; 700 - sliding assembly; 710 - slide rail; 800a - first baffle; 800b - second baffle; 900 - dial gauge stand; 910 - second dial indicator;

[0022] 10 - first fixing member; 20 - second fixing member; 30 - workpiece to be measured;

[0023] 01 - annular groove. Detailed Embodiments

[0024] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0025] Figure 1 is a schematic structural diagram of a detection device according to an embodiment of the present application. Refer to Figure 1, in the embodiments of the present application, a detection device is provided. The detection device includes a base 100, a fixing rod 200, a support frame 300, a first dial indicator 400, and a limiting component 500. Among them, the fixing rod 200 is arranged on the surface of the base 100, the support frame 300 is arranged on the fixing rod 200 and can slide along a first direction, the first direction is the height direction of the fixing rod 200, and the first dial indicator 400 is installed on the support frame 300. Thus, by adjusting the position of the support frame 300 along the first direction on the fixing rod 200, the position of the first dial indicator 400 can be adjusted. The limiting component 500 includes a first limiting member 510 and a second limiting member 520 arranged oppositely along the first direction. The first limiting member 510 is arranged on the support frame 300 and can move relative to the support frame 300 along the first direction, and the second limiting member 520 is arranged on the base 100. One side of the first limiting member 510 facing the second limiting member 520 has a first limiting portion 511, and the first limiting portion 511 is used to match one end of the workpiece to be measured (not shown in the figure). One side of the second limiting member 520 facing the first limiting member 510 has a second limiting portion 521, and the second limiting portion 521 is used to match the other end of the workpiece to be measured, so as to form a space for accommodating the workpiece to be measured between the first limiting member 510 and the second limiting member 520. The surface of the first limiting member 510 facing away from the workpiece to be measured is in contact with the probe of the first dial indicator 400.

[0026] It can be understood that the first limiting portion 511 matches one end of the workpiece to be measured, and the second limiting portion 521 matches the other end of the workpiece to be measured. Therefore, a space for accommodating the workpiece to be measured is formed between the first limiting member 510 and the second limiting member 520, and the workpiece to be measured can be stably fixed. Among them, the structures of the first limiting member 510 and the second limiting member 520 are designed according to the structure and shape of the workpiece to be measured. For example, one end of the valve push rod is a ball head, and the ball head is usually concave spherical so that the ball head of the valve rocker adjusting screw can be seated therein; the other end is a ball seat, and the ball seat is usually spherical to be inserted into the concave spherical seat of the valve tappet. When the workpiece to be measured is a valve push rod, the first limiting member 510 includes a first base 512 and a first limiting portion 511 arranged on the surface of the first base 512, and the first limiting portion 511 is a convex structure to be inserted into the concave spherical ball head of the valve push rod. The second limiting portion 521 is a groove structure, that is, one side of the second limiting member 520 facing the first limiting member 510 has a groove structure so that the ball seat can be inserted into the above groove structure. Thus, the first limiting member 510 and the second limiting member 520 can clamp the valve push rod in the middle.

[0027] Of course, when the component to be measured has other shapes and structures, the shapes and structures of the first limiting member 510 and the second limiting member 520 are adjusted accordingly. For example, the first limiting portion 511 may be a groove structure, the second limiting portion 521 may be a protrusion structure, or both the first limiting portion 511 and the second limiting portion 521 are protrusion structures, etc., as long as it is ensured that the component to be measured can be clamped in the middle.

[0028] In some embodiments of the present application, the first limiting member 510 is detachably connected to the support frame 300, and the second limiting member 520 is detachably connected to the base 100. Thus, the corresponding first limiting member 510 and second limiting member 520 can be replaced according to the size of the component to be measured, so that the detection device in the present application can detect components to be measured with different shapes and sizes.

[0029] Figure 2 Schematic diagram of the structure of the first limiting member according to an embodiment of the present application, refer to Figure 2 The protrusion structure includes N stacked protrusion parts 511a, and along the protruding direction D1 of the protrusion structure, the radial dimensions of the N protrusion parts 511a gradually decrease to form a stepped structure, where N is a positive integer greater than or equal to 2. Exemplarily, N can be 2, 3, 4, 5, 6, etc. Because it includes N protrusion parts 511a with different radial dimensions, the first limiting member 510 can match components to be measured with different sizes, and its applicable range is expanded. It can be understood that the size of each protrusion part 511a is designed according to the specific size of the component to be measured.

[0030] Figure 3 Schematic diagram of the structure of the second limiting member according to an embodiment of the present application, refer to Figure 3 The inner wall of the groove structure is provided with M annular stepped structures to form (M + 1) annular grooves 01, and along the direction from the bottom of the groove structure to the opening of the groove structure, the inner diameters of the (M + 1) annular grooves 01 gradually increase, where M is a positive integer greater than or equal to 1. Exemplarily, M can be 2, 3, 4, 5, 6, etc. It can be understood that the inner diameter of each annular groove 01 is designed according to the specific size of the component to be measured. Because it includes (M + 1) annular grooves 01 with different inner diameters, the second limiting member 520 can match components to be measured with different sizes, and its applicable range is expanded.

[0031] Continue to refer to Figure 1, the support frame 300 includes a first support plate 310 and a second support plate 320 which are spaced apart. The first dial indicator 400 is disposed on the first support plate 310, and the measuring rod of the first dial indicator 400 faces the second support plate 320. The second support plate 320 is provided with a first through hole (not shown in the figure). The first base 512 is located on the side of the second support plate 320 facing the first support plate 310, and the convex structure extends into the first through hole. The inner diameter of the first through hole is smaller than the outer diameter of the first base 512. When no standard part or part to be measured is placed, the first base 512 can abut against the second support plate 320.

[0032] Reference can continue to Figure 1 , the support frame 300 further includes a connecting plate 330. The first support plate 310 and the second support plate 320 are connected by the connecting plate 330 and form a U-shaped structure. The connecting plate 330 and the fixed rod 200 are detachably connected by a first fixing member 10. Among them, the first fixing member 10 can be a bolt, a screw, etc. By adjusting the connection position of the first fixing member 10 and the fixed rod 200, the position of the support frame 300 relative to the fixed rod 200 can be adjusted.

[0033] Optionally, the first dial indicator 400 and the first support plate 310 are detachably connected by a second fixing member 20. Among them, the second fixing member 20 can be a screw, a bolt, a pin, etc.

[0034] Reference can continue to Figure 1 , the first support plate 310 is provided with a mounting hole (not shown in the figure) that penetrates the first support plate 310 in the first direction. The head of the first dial indicator 400 is disposed on the surface of the first support plate 310 facing away from the second support plate 320, and the measuring rod of the first dial indicator 400 passes through the above mounting hole and points to the second support plate 320.

[0035] In some embodiments of the present application, the detection device further includes a compression spring 600. The compression spring 600 is sleeved on the measuring rod of the first dial indicator 400. One end of the compression spring 600 abuts against the first support plate 310, and the other end of the compression spring 600 abuts against the first limiting member 510. The compression spring 600 can play a limiting role on the first limiting member 510, so that under the jacking action of the standard part or the part to be measured, the first limiting member 510 can only move in the direction close to the head of the first dial indicator 400.

[0036] Among them, the structure of the support frame 300 of the present application can be set according to actual needs. The structure of the detection device including the first support plate 310 and the second support plate 320 is simple. However, the adjustment of the position of the first limiting member 510 in the first direction is not flexible enough.

[0037] In view of this, another structure of the detection device is also provided in the present application. Figure 4The structural schematic diagram of the detection device according to another embodiment of the present application is shown in reference to Figure 4 , the first limiting member 510 and the support frame 300 are slidably connected through a sliding assembly 700, so that the first limiting member 510 can slide along the first direction, and the adjustment method of the position of the first limiting member 510 is more flexible and convenient.

[0038] Among them, the sliding assembly 700 includes a slide rail 710 extending along the first direction and a slider cooperating with the slide rail 710. In some alternative embodiments, the slide rail 710 is provided on the support frame 300, and the slider (not shown in the figure) is provided on the first limiting member 510, specifically, it can be provided on the first base 512. In other embodiments of the present application, the slide rail 710 can also be provided on the first limiting member 510, and correspondingly, the slider is provided on the support frame 300.

[0039] It can be understood that when the first limiting member 510 and the support frame 300 are slidably connected through the sliding assembly 700, when the test piece 30 is a valve push rod, the first limiting portion 511 can be a convex structure, and the second limiting portion 521 can be a groove structure; the first limiting portion 511 can also be a groove structure, and the second limiting portion 521 is a convex structure.

[0040] In some embodiments of the present application, the detection device further includes a first baffle 800a and a second baffle 800b. The first baffle 800a is provided at one end of the slide rail 710, and the second baffle 800b is provided at the other end of the slide rail 710, so as to prevent the first limiting member 510 from disengaging from the slide rail 710.

[0041] Figure 5 The structural schematic diagram of the detection device according to still another embodiment of the present application is shown in reference to Figure 5 , the detection device further includes a dial gauge holder 900 provided on the base 100 and a second dial indicator 910 mounted on the dial gauge holder 900. The probe of the second dial indicator 910 is used to contact the rod body of the test piece 30 to detect the runout of the test piece 30. The second dial indicator 910 can be a lever dial indicator.

[0042] The structures of the detection devices in various possible embodiments of the present application have been specifically described above. Next, the working process of the detection device will be introduced in detail:

[0043] First, select a suitable limiting component 500 according to the shape and size of the component to be measured 30, and assemble the limiting component 500. Then, adjust the support frame 300 relative to the fixed rod 200 along the first direction to a suitable position according to the height of the standard component, place the standard component between the first limiting member 510 and the second limiting member 520, and calibrate the first dial indicator 400 to zero; after removing the standard component, place the component to be measured 30 between the first limiting member 510 and the second limiting member 520, record the reading value B of the first dial indicator 400, and the length of the component to be measured 30 is equal to the sum of the length H of the standard component and the reading value B. The same component to be measured 30 needs to be clamped and measured three times repeatedly and the maximum value is taken. Among them, the standard component is a component with a known length, and this component is of the same type as the component to be measured, that is, the shape and structure are the same as those of the component to be measured, only the length is different.

[0044] Adjust the position of the head of the second dial indicator 910 so that it has a certain amount of pressure on the dial (about 0.2 mm) after contacting the component to be measured 30. Slowly and uniformly rotate the rod body of the component to be measured 30 for one week, and observe the change of the second dial indicator 910. The difference between the maximum value and the minimum value is the runout of the rod body of the component to be measured 30. The same part needs to be measured once at three different positions, and the maximum difference is taken as the runout of the component to be measured 30.

[0045] In summary, the detection device in this application has the following advantages:

[0046] 1. The limiting component 500 can stably fix the component to be measured 30, such as a valve push rod, to accurately detect the length and runout of the component to be measured 30;

[0047] 2. The limiting component 500 in this application can be adapted to components to be measured 30 with different sizes, thereby expanding the application range of the detection device;

[0048] 3. The operation method of the detection device in this application is simple, and rapid detection of a large number of parts can be realized;

[0049] 4. The structure of the detection device in this application is firm, has a long service life, and has no additional requirements for the use and storage environment.

[0050] Obviously, those skilled in the art can make various changes and modifications to the embodiments of this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application also intends to include these changes and modifications.

Claims

1. A detection device, characterized in that, It includes a base, a fixed rod, a support frame, a first dial indicator, and a limiting component. Among them, the fixed rod is arranged on the surface of the base, the support frame is arranged on the fixed rod and can slide along a first direction, and the first direction is the height direction of the fixed rod. The first dial indicator is installed on the support frame; The limiting component includes a first limiting member and a second limiting member arranged oppositely along the first direction. The first limiting member is arranged on the support frame and can move relative to the support frame along the first direction. The second limiting member is arranged on the base. One side of the first limiting member facing the second limiting member has a first limiting portion, and the first limiting portion is used to match one end of the workpiece to be measured. One side of the second limiting member facing the first limiting member has a second limiting portion, and the second limiting portion is used to match the other end of the workpiece to be measured, so as to form a space for accommodating the workpiece to be measured between the first limiting member and the second limiting member. The surface of the first limiting member facing away from the workpiece to be measured contacts the probe of the first dial indicator.

2. The detection device according to claim 1, wherein The first limiting member includes a first base and the first limiting portion arranged on the surface of the first base, and the first limiting portion is a convex structure; And / or, the second limiting portion is a groove structure.

3. The detection device according to claim 2, wherein The convex structure includes N stacked protrusions, and along the protruding direction of the convex structure, the radial dimensions of the N protrusions gradually decrease to form a stepped structure, where N is a positive integer greater than or equal to 2.

4. The detection device according to claim 2, wherein The inner wall of the groove structure is provided with M annular stepped structures to form (M + 1) annular grooves, and along the direction from the bottom of the groove structure to the opening of the groove structure, the inner diameters of the (M + 1) annular grooves gradually increase, where M is a positive integer greater than or equal to 1.

5. The detection device according to any one of claims 2-4, characterized in that, The support frame includes a first support plate and a second support plate arranged at intervals; The first dial indicator is arranged on the first support plate, and the measuring rod of the first dial indicator faces the second support plate. The second support plate is provided with a first through hole. The first base is located on the side of the second support plate facing the first support plate, and the convex structure extends into the first through hole. The inner diameter of the first through hole is smaller than the outer diameter of the first base.

6. The detection device according to claim 5, characterized in that The detection device further includes a compression spring. The compression spring is sleeved on the measuring rod of the first dial indicator. One end of the compression spring abuts against the first support plate, and the other end of the compression spring abuts against the first base.

7. The detection device according to any one of claims 1-4, characterized in that, The first limiting member is slidably connected to the support frame through a sliding component; among them, the sliding component includes a slide rail extending along the first direction and a slider cooperating with the slide rail. The slide rail is arranged on the support frame, and the slider is arranged on the first limiting member.

8. The detection device according to claim 7, characterized in that, The detection device further includes a first baffle and a second baffle. The first baffle is arranged at one end of the slide rail, and the second baffle is arranged at the other end of the slide rail.

9. The detection device according to claim 1, characterized in that, The second limiting member is detachably connected to the base.

10. The detection device according to any one of claims 1-3, characterized in that, The detection device further includes a dial gauge stand disposed on the base and a second dial indicator mounted on the dial gauge stand. The probe of the second dial indicator is used to contact the rod body of the workpiece to be measured so as to detect the runout of the workpiece to be measured.

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