Hole depth detection jig

Abstract

The utility model relates to the technical field of detection jigs, in particular to a hole depth detection jig. Comprising a base, a dial indicator is fixedly connected to the upper surface of the base, a measuring end rod is fixedly arranged on a measuring head of the dial indicator, a positioning sleeve is fixedly connected to one side of the dial indicator, the measuring end rod is coaxially arranged in the positioning sleeve in a sliding mode, and the end, away from the dial indicator, of the measuring end rod extends out of the positioning sleeve. Two extension plates are symmetrically hinged to the end, away from the dial indicator, of the positioning sleeve, and a rotating mechanism is arranged on the positioning sleeve and used for driving the two extension plates to rotate. According to the utility model, after one end of the measuring end rod is contacted with the deepest part of the inner wall of the stepped hole, a product extrudes the measuring end rod towards the direction close to the dial indicator until the end face of the product is contacted with the two extension plates, and the maximum depth of the stepped hole can be accurately measured through the reading on the dial indicator.

Description

Technical Field

[0001] The utility model relates to the technical field of detection jigs, in particular to a hole depth detection jig. Background Art

[0002] As the manufacturing industry continues to develop towards high speed, high efficiency and flexibility, the use of many precision shaft parts has also increased sharply. Sometimes it is necessary to process blind holes on the end faces of shaft parts. Since such parts have high requirements for dimensional accuracy, the hole depth needs to be tested after blind hole processing.

[0003] In the prior art, a caliper and a plug gauge are usually used to measure the hole depth of a product. During the measurement process, a worker needs to insert the caliper and the plug gauge into the hole, and then keep the caliper and the plug gauge stable to accurately measure the hole depth. However, in the process of using the caliper and the plug gauge, it is necessary to ensure that the caliper and the plug gauge do not shake to ensure the accuracy of the hole depth detection. However, in the process of stabilizing the caliper and the plug gauge, the worker may cause the caliper and the plug gauge to shake in a small range because he cannot position his limbs. This will lead to errors in the hole depth detection. The worker needs to perform multiple measurements and take the average value to reduce the error. The above method not only has a long detection cycle, but also increases the time it takes for workers to detect the hole depth. In view of this, we propose a hole depth detection jig. Utility Model Content

[0004] The purpose of the present invention is to provide a hole depth detection jig to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, one of the objectives of the present utility model is to provide a hole depth detection jig, including a base, a dial indicator fixedly connected to the upper surface of the base, a measuring end rod fixedly arranged on the probe of the dial indicator, a positioning sleeve fixedly connected to one side of the dial indicator, the measuring end rod coaxially slidingly arranged in the positioning sleeve, and the end of the measuring end rod away from the dial indicator extends to the outside of the positioning sleeve, the end of the positioning sleeve away from the dial indicator is symmetrically hinged to two extension plates, and a rotating mechanism is provided on the positioning sleeve, and the rotating mechanism is used to drive the two extension plates to rotate. When the extension plate is rotated to a position perpendicular to the axis of the positioning sleeve, the extension plate and the side of the positioning sleeve away from the dial indicator are located in the same vertical plane, and two locking mechanisms are symmetrically provided on the positioning sleeve. When the rotating mechanism drives the extension plate to rotate to a position parallel to the axis of the positioning sleeve, the rotating mechanism pushes the two locking mechanisms close to each other, so that the locking mechanism limits the position of the measuring end rod.

[0006] As a further improvement of the present technical solution, a threaded groove is provided on the positioning sleeve, and the rotating mechanism includes a nut threadedly connected to the threaded groove, a sleeve is rotatably provided on the side of the nut close to the extension plate, and the sleeve is slidably sleeved on the positioning sleeve, and two connecting rods are symmetrically hinged on one side of the sleeve, and an embedded groove is provided on the side wall of the extension plate, and the other ends of the two connecting rods are respectively rotatably provided inside the two embedded grooves.

[0007] As a further improvement of the present technical solution, when the nut contacts the end of the thread groove away from the dial indicator, the extension plate rotates to a position perpendicular to the axis of the positioning sleeve.

[0008] As a further improvement of the present technical solution, a guide groove is provided on the side wall of the positioning sleeve, and the locking mechanism includes a clamping rod slidably arranged inside the guide groove, a convex ring is fixedly connected to the side wall of the clamping rod, and the convex ring is arranged inside the positioning sleeve, and a spring mounted on the clamping rod is fixedly connected between the convex ring and the inner wall of the positioning sleeve.

[0009] As a further improvement of the present technical solution, two card slots are provided on the side wall of the measuring end rod at positions corresponding to the two card rods. When the connecting rod drives the extension plate to rotate to a position parallel to the axis of the positioning sleeve, the two connecting rods respectively push the two card rods close to the measuring end rod, so that one end of the card rod is inserted into the corresponding card slot.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. This hole depth detection fixture makes one end of the measuring end rod contact the deepest part of the inner wall of the stepped hole, and then the product squeezes the measuring end rod toward the dial indicator until the end face of the product contacts the two extension plates. The maximum depth of the stepped hole can be accurately measured by the reading on the dial indicator, thereby obtaining the hole depth data, which is convenient for workers to record the data.

[0012] 2. After the measurement work is completed, the hole depth detection fixture can reduce the space occupied by the fixture by rotating the extension plate to a position parallel to the measuring end rod, making it easier for the inspectors to store the fixture and reducing the possibility of the extension plate being bent and broken due to compression.

[0013] 3. After the measurement work is completed, when the extension plate of the hole depth detection fixture is rotated to a position parallel to the measuring end rod, the two connecting rods push the two clamping rods close to the measuring end rod, so that one end of the clamping rod is inserted into the corresponding clamping slot. The clamping rod and the clamping slot cooperate to limit the movement of the measuring end rod, thereby preventing the squeezed measuring end rod from approaching the dial indicator, ensuring that the dial indicator can be stored in a relaxed state, thereby extending the service life of the dial indicator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a cross-sectional view of the overall structure of the utility model;

[0016] Figure 3 It is a cross-sectional view of a local structure of the utility model;

[0017] Figure 4 For the utility model Figure 3 A magnified view of the structure at point A;

[0018] Figure 5 It is a structural schematic diagram of the rotating mechanism of the utility model.

[0019] The meaning of each number in the figure is:

[0020] 1. Base; 2. Dial indicator;

[0021] 3. Positioning sleeve; 31. Extension plate;

[0022] 4. Measuring end rod; 41. Card slot;

[0023] 5. Rotating mechanism; 51. Nut; 52. Sleeve; 53. Connecting rod;

[0024] 6. Locking mechanism; 61. Lever; 62. Raised ring; 63. Spring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1

[0027] See also Figure 1-Figure 4When the measuring end rod 4 moves, the pointer of the dial indicator 2 rotates. When the end face of the positioning sleeve 3 contacts the product, the reading indicated by the pointer of the dial indicator 2 is the hole depth to be measured. This jig can be used to measure the hole depth of the product quickly and accurately.

[0028] When using the jig to measure the maximum depth of a stepped hole to be measured, there is a situation where the diameter of the inlet end of the hole to be measured is larger than the diameter of the positioning sleeve 3. When one end of the measuring end rod 4 contacts the deepest inner wall of the hole to be measured, the inspector cannot squeeze and push the measuring end rod 4 to make the end face of the positioning sleeve 3 contact the product, resulting in the inability to complete the measurement of the hole to be measured. To solve this problem, two extension plates 31 are symmetrically hinged at the end of the positioning sleeve 3 away from the dial indicator 2. At the same time, a rotating mechanism 5 is provided on the positioning sleeve 3. The rotating mechanism 5 is used to drive the two extension plates 31 to rotate. The structure of the rotating mechanism 5 is detailed below. Figure 2 、 Figure 3 and Figure 5, a thread groove is provided on the positioning sleeve 3, and the rotating mechanism 5 includes a nut 51 threadedly connected to the thread groove. A sleeve 52 is rotatably provided on one side of the nut 51 close to the extension plate 31. The sleeve 52 is slidably sleeved on the positioning sleeve 3. Two connecting rods 53 are symmetrically hinged on one side of the sleeve 52. The connecting rod 53 is tilted. An embedded groove is provided on the side wall of the extension plate 31. The other ends of the two connecting rods 53 are respectively rotatably provided inside the two embedded grooves. Before measuring the hole depth, the inspection personnel first rotate the nut 51. Through the threaded connection between the nut 51 and the thread groove, the nut 51 moves horizontally along the axis direction of the positioning sleeve 3. The moving nut 51 drives the sleeve 52 close to the extension plate 31. The extension plate 31 and the sleeve 52 drive one end of the two connecting rods 53 to move, so that the other end of the connecting rod 53 drives the corresponding extension plate 31 to rotate. When the nut 51 contacts the end of the thread groove away from the dial indicator 2, the distance between the nut 51 and the dial indicator 2 reaches the maximum, and the extension plate 31 rotates to a position perpendicular to the axis of the positioning sleeve 3. At this time, the extension plate 31 and the side of the positioning sleeve 3 away from the dial indicator 2 are located on the same vertical plane. When one end of the measuring end rod 4 contacts the deepest inner wall of the step hole, the inspector pushes the measuring end rod 4 through the product squeeze until the end face of the product contacts the two extension plates 31. The maximum depth of the step hole can be measured using the fixture.

[0029] When the measuring work is finished and the inspector stores the jig, the inspector rotates the nut 51 in the opposite direction to rotate the two extension plates 31 to a position parallel to the axis of the positioning sleeve 3, thereby reducing the space occupied by the jig, making it easier for the inspector to store the jig, and reducing the possibility of the extension plates 31 being bent and broken due to squeezing.

[0030] However, when the fixture is stored, there is a situation where the measuring end rod 4 is squeezed close to the dial indicator 2. When the measuring end rod 4 is squeezed, the components inside the dial indicator 2 will be in a stressed state, and the components of the dial indicator 2 will suffer from metal fatigue, shortening the service life of the dial indicator 2. To solve this problem, two locking mechanisms 6 are symmetrically arranged on the positioning sleeve 3. When the rotating mechanism 5 drives the extension plate 31 to rotate to a position parallel to the axis of the positioning sleeve 3, the rotating mechanism 5 pushes the two locking mechanisms 6 close to each other, so that the locking mechanism 6 limits the position of the measuring end rod 4, prevents the measuring end rod 4 from approaching the dial indicator 2, keeps the components of the dial indicator 2 in a relaxed state, and extends the service life of the dial indicator 2.

[0031] The structure of the locking mechanism 6 is detailed below. Figure 4, a guide groove is provided on the side wall of the positioning sleeve 3, and the locking mechanism 6 includes a card rod 61 slidably arranged inside the guide groove, and a convex ring 62 is fixedly connected to the side wall of the card rod 61. The convex ring 62 is arranged inside the positioning sleeve 3, and a spring 63 arranged on the card rod 61 is fixedly connected between the convex ring 62 and the inner wall of the positioning sleeve 3. When the connecting rod 53 is not in contact with the card rod 61, the end of the card rod 61 away from the measuring end rod 4 is located outside the positioning sleeve 3, the spring 63 is in a relaxed state, and the side wall of the measuring end rod 4 is in contact with the two Two card slots 41 are provided at the positions corresponding to the card rod 61. When the connecting rod 53 drives the extension plate 31 to rotate to a position parallel to the axis of the positioning sleeve 3, the two connecting rods 53 respectively push the two card rods 61 close to the measuring end rod 4, so that one end of the card rod 61 is inserted into the corresponding card slot 41. The card rod 61 and the card slot 41 cooperate to limit the movement of the measuring end rod 4, thereby preventing the squeezed measuring end rod 4 from approaching the dial indicator 2, ensuring that the dial indicator 2 can be stored in a relaxed state, thereby extending the service life of the dial indicator 2.

[0032] At the same time, the base 1 is used to improve the stability of the dial indicator 2 when in use. In order to ensure that the dial indicator 2 can be used normally, the upper surface of the base 1 and the lower surface of the extension plate 31 are not on the same horizontal plane, and there is a large gap between the measuring end rod 4 and the base 1. At the same time, the side of the base 1 away from the dial indicator 2 and the side surfaces of the two extension plates 31 when they are perpendicular to the axis of the positioning sleeve 3 are on the same plane, so as to prevent the base 1 from blocking the measuring end rod 4 from being inserted into the hole when the worker measures the hole depth, thereby ensuring the normal use of the device.

[0033] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A hole depth detection jig, comprising a base (1), characterized in that: The upper surface of the base (1) is fixedly connected to a dial gauge (2), a measuring end rod (4) is fixedly provided on the probe of the dial gauge (2), a positioning sleeve (3) is fixedly provided on one side of the dial gauge (2), the measuring end rod (4) is coaxially slidably provided in the positioning sleeve (3), and the end of the measuring end rod (4) away from the dial gauge (2) extends to the outside of the positioning sleeve (3), the end of the positioning sleeve (3) away from the dial gauge (2) is symmetrically hinged to two extension plates (31), and a rotating mechanism (5) is provided on the positioning sleeve (3), and the rotating mechanism ( 5) is used to drive the two extension plates (31) to rotate. When the extension plates (31) rotate to a position perpendicular to the axis of the positioning sleeve (3), the extension plates (31) and the positioning sleeve (3) are located on the same vertical plane on a side away from the dial indicator (2). Two locking mechanisms (6) are symmetrically arranged on the positioning sleeve (3). When the rotating mechanism (5) drives the extension plates (31) to rotate to a position parallel to the axis of the positioning sleeve (3), the rotating mechanism (5) pushes the two locking mechanisms (6) to approach each other, so that the locking mechanisms (6) limit the position of the measuring end rod (4).

2. The hole depth detection jig according to claim 1, characterized in that: The positioning sleeve (3) is provided with a threaded groove, and the rotating mechanism (5) includes a nut (51) threadedly connected to the threaded groove. A sleeve (52) is rotatably provided on one side of the nut (51) close to the extension plate (31). The sleeve (52) is slidably sleeved on the positioning sleeve (3). Two connecting rods (53) are symmetrically hinged on one side of the sleeve (52). An embedded groove is provided on the side wall of the extension plate (31), and the other ends of the two connecting rods (53) are rotatably provided in the two embedded grooves respectively.

3. The hole depth detection jig according to claim 2, characterized in that: When the nut (51) contacts the end of the thread groove away from the dial indicator (2), the extension plate (31) rotates to a position perpendicular to the axis of the positioning sleeve (3).

4. The hole depth detection jig according to claim 1, characterized in that: A guide groove is provided on the side wall of the positioning sleeve (3); the locking mechanism (6) comprises a clamping rod (61) slidably arranged inside the guide groove; a convex ring (62) is fixedly connected to the side wall of the clamping rod (61); the convex ring (62) is arranged inside the positioning sleeve (3); and a spring (63) sleeved on the clamping rod (61) is fixedly connected between the convex ring (62) and the inner wall of the positioning sleeve (3).

5. The hole depth detection jig according to claim 4, characterized in that: Two clamping grooves (41) are provided on the side wall of the measuring end rod (4) at positions corresponding to the two clamping rods (61). When the connecting rod (53) drives the extension plate (31) to rotate to a position parallel to the axis of the positioning sleeve (3), the two connecting rods (53) respectively push the two clamping rods (61) close to the measuring end rod (4), so that one end of the clamping rod (61) is inserted into the corresponding clamping groove (41).

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