Go gauge testing fixture for piston blank pin hole location degree

Abstract

The utility model provides a go gauge testing fixture for piston blank pin hole position accuracy, comprising a piston blank, the outer side of the piston blank is provided with a pin hole, and the pin hole is of a circular hole-shaped structure; the profiling clamp is used for positioning the piston blank, and a detection through hole is formed in the corresponding position of the profiling clamp; the centering mechanism comprises a centering guide column and connecting rod pieces annularly distributed at the outer end of the centering guide column, and a fixed block is fixedly arranged on one side of the centering guide column. According to the device, by pushing the sliding block to move, the connecting rod piece can be rapidly expanded outwards, the contact block abuts against the inner wall of the pin hole, center positioning of the pin hole is achieved, the through rod is arranged in the centering guide column in a sliding mode, whether the position degree of the pin hole is qualified or not is judged according to whether the through rod can be inserted into the detection through hole in the profiling clamp or not, and rapid detection is achieved. The pushing piece facilitates the personnel to control the sliding block to move with one hand, the supporting plate at the outer end of the centering guide column facilitates the placement of the through rod, and the personnel can push the through rod to move through the rod handle, so that the personnel can conveniently control the through rod to move.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a through gauge inspection tool for the position of a pin hole of a piston blank. Background Art

[0002] The pin hole position of the forged piston blank needs to be inspected, and there are high requirements for the tolerance of the pin hole position of the forged piston blank. The current inspection method is to use a three-coordinate measuring instrument to take points for inspection. The inspection value has high accuracy, but the efficiency is very low. Other conventional inspection fixtures need to use a dial indicator to measure the value in each direction. The inspection value has low accuracy and low efficiency. When the output is large, it is easy to cause batch scrap loss due to insufficient inspection frequency, which is difficult to meet the product production inspection needs. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a through gauge inspection tool which can quickly inspect the position of the pin hole of a piston blank, so as to solve the problem raised in the above-mentioned background technology.

[0004] The technical problem solved by the utility model is achieved by the following technical solutions:

[0005] A through gauge inspection tool for the position of a piston blank pin hole, comprising:

[0006] A piston blank, wherein a pin hole is arranged on the outer side of the piston blank, and the pin hole is a circular hole structure;

[0007] A profiling fixture, which is used to position the piston blank, and a detection through hole is provided at a corresponding position of the profiling fixture;

[0008] A centering mechanism, which includes a centering guide column and a connecting rod member arranged at the outer end of the centering guide column in an annular distribution, a fixed block is fixedly arranged on one side of the centering guide column, a sliding block is slidingly sleeved at the corresponding position of the centering guide column, a penetrating centering hole is arranged in the middle of the centering guide column, the connecting rod member includes an active connecting rod and a driven connecting rod arranged to rotate crosswise, and the outer ends of the active connecting rod and the driven connecting rod are respectively provided with contact blocks to abut against the inner wall of the pin hole, the side of the active connecting rod away from the contact block is rotatably mounted on the sliding block, and the side of the driven connecting rod away from the contact block is rotatably mounted on the fixed block;

[0009] A through rod is inserted into the centering hole of the centering guide column and is slidably arranged in the centering hole to detect whether the through rod can be inserted into the detection through hole of the profiling fixture, thereby detecting whether the position of the pin hole of the piston blank is qualified.

[0010] Specifically, the personnel insert the centering mechanism into the pin hole and push the slider to move on the centering guide column so that the connecting rod members arranged in an annular manner are pressed against the inner wall of the pin hole through the contact block, thereby locating the center of the pin hole. The detection through hole is set corresponding to the center position of the standard piston blank pin hole. Therefore, when the through rod in the centering guide column is inserted into the detection through hole, it means that the pin hole of the piston blank is a standard qualified product. If the through rod cannot be inserted into the detection through hole, it means that there is a deviation in the position of the pin hole.

[0011] As a further solution of the utility model:

[0012] The middle of the active connecting rod and the driven connecting rod are respectively provided with shaft holes, one side of the active connecting rod and the driven connecting rod are fitted together, and rivets are passed through the shaft holes to make the active connecting rod and the driven connecting rod rotatably connected.

[0013] As a further solution of the utility model:

[0014] The centering guide column is a hexagonal column structure, and a hexagonal sliding groove is provided in the middle of the sliding block corresponding to the centering guide column to improve the sliding stability of the sliding block.

[0015] As a further solution of the utility model:

[0016] The centering guide column is also provided with a pusher for driving the slider to move. The pusher includes a jacket sleeved on the centering guide column, a handle fixedly provided at the lower end of the jacket, and a push rod slidably provided on the jacket. The jacket is provided with a locking knob to fix the jacket on the centering guide column. The jacket is provided with a guide sleeve corresponding to the push rod. The push rod is slidably connected in the guide sleeve. One side of the push rod is fixedly connected to the slider, and the other side is provided with a push handle for easy pushing. Specifically, a person holds the handle and pulls the push handle to move. The push rod drives the slider to move on the centering guide column. The connecting rod expands outward, so that the contact block abuts against the inner wall of the blank pin hole, which is convenient for the person to operate with one hand.

[0017] As a further solution of the utility model:

[0018] The outer end of the centering guide column is also provided with a supporting plate, and the supporting plate is provided with an arc groove for placing a through rod. The outer end of the through rod is provided with a rod handle, so that people can push the through rod to move.

[0019] As a further solution of the utility model:

[0020] The outer ends of the fixed block and the sliding block are circular, and the outer end surface of the sliding block is provided with a plurality of groups of first supports in a circular distribution corresponding to the active connecting rod, and the active connecting rod is rotatably connected to the first support, and the outer end surface of the fixed block is provided with a plurality of groups of second supports in a circular distribution corresponding to the driven connecting rod, and the driven connecting rod is rotatably connected to the second support.

[0021] As a further solution of the utility model:

[0022] The first support includes two groups of support plates arranged in parallel, and a rotation groove for accommodating the active connecting rod is provided between the two groups of support plates. Support shafts are fixedly provided on the two groups of support plates, and the support shafts pass through the openings corresponding to the active connecting rods, so that the active connecting rod is rotatably connected to the first support; the structure of the second support is consistent with that of the first support.

[0023] Compared with the prior art, the utility model has the following beneficial effects: the device can quickly open the connecting rod by pushing the slider to move, the contact block is set against the inner wall of the pin hole to realize the center positioning of the pin hole, the through rod is slidably set in the centering guide column, and whether the position of the pin hole is qualified is judged by whether the through rod can be inserted into the detection through hole on the profiling fixture, so as to realize rapid detection. The pushing member is convenient for personnel to control the movement of the slider with one hand, and the support plate at the outer end of the centering guide column is convenient for the placement of the through rod. Personnel can push the through rod to move through the rod handle, so as to facilitate personnel to control the movement of the through rod.

[0024] The device uses a pass or fail method to determine whether the position of a piston blank pin hole is qualified or not. It is suitable for the detection of piston pin holes with particularly large production volumes. It does not need to use a dial indicator to detect the specific position value, and can quickly determine whether the pin hole position is qualified. The device has a simple structure, low cost of the inspection tool, easy installation, fast operation, and relatively accurate inspection, which can greatly improve the inspection efficiency. In addition, the device simplifies the determination of the piston pin hole position: there is no need to use three-coordinate point sampling, no need to use a dial indicator to measure the value, and it can accurately detect whether the pin hole position is qualified, which can meet the needs of large-scale piston blank production. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 The centering mechanism structure of the utility model is shown in FIG. Figure 1 ;

[0027] Figure 3 The centering mechanism structure of the utility model is shown in FIG. Figure 2 ;

[0028] Markings in the figure: 1. Piston blank; 2. Pin hole; 3. Profiling fixture; 4. Detection through hole; 5. Centering mechanism; 6. Through rod; 7. Jacket; 51. Centering guide column; 52. Fixed block; 53. Slider; 54. Active connecting rod; 55. Driven connecting rod; 56. Contact block; 57. Support plate; 58. First support; 59. Second support; 61. Rod handle; 71. Handle; 72. Locking knob; 73. Push rod; 74. Guide sleeve; 75. Push handle. DETAILED DESCRIPTION

[0029] In order to make the technical means for realizing the utility model, creative features, objectives and effects easy to understand, the utility model is further explained below with reference to specific illustrations.

[0030] like Figures 1 to 3 As shown,

[0031] This embodiment provides a through gauge inspection tool for the position of a piston blank pin hole, comprising:

[0032] A piston blank 1, a pin hole 2 is provided on the outer side of the piston blank 1, and the pin hole 2 is a circular hole structure;

[0033] A profiling fixture 3, which is used to position the piston blank 1, and a detection through hole 4 is provided at a corresponding position of the profiling fixture 3;

[0034] A centering mechanism 5, which includes a centering guide column 51 and a connecting rod member arranged in an annular distribution at the outer end of the centering guide column 51, a fixed block 52 is fixedly provided on one side of the centering guide column 51, a sliding block 53 is slidably sleeved at the corresponding position of the centering guide column 51, and a penetrating centering hole is provided in the middle of the centering guide column 51, and the connecting rod member includes an active connecting rod 54 and a driven connecting rod 55 arranged to rotate crosswise, and the outer ends of the active connecting rod 54 and the driven connecting rod 55 are respectively provided with a contact block 56 to abut against the inner wall of the pin hole 2, and the side of the active connecting rod 54 away from the contact block 56 is rotatably installed on the sliding block 53, and the side of the driven connecting rod 55 away from the contact block 56 is rotatably installed on the fixed block 52;

[0035] The through rod 6 is inserted into the centering hole of the centering guide column 51 and slidably arranged in the centering hole to detect whether the through rod 6 can be inserted into the detection through hole 4 of the profiling fixture 3, thereby detecting whether the position of the pin hole 2 of the piston blank 1 is qualified.

[0036] Specifically, personnel insert the centering mechanism 5 into the pin hole 2, and push the slider 53 to move on the centering guide column 51, so that the connecting rod members arranged in an annular manner are pressed against the inner wall of the pin hole 2 through the contact block 56, thereby positioning the center of the pin hole 2. The detection through hole 4 is set corresponding to the center position of the pin hole 2 of the standard piston blank 1. Therefore, when the through rod 6 in the centering guide column 51 is inserted into the detection through hole 4, it means that the pin hole 2 of the piston blank 1 is a standard qualified product. If the through rod 6 cannot be inserted into the detection through hole 4, it means that the position of the pin hole 2 is deviated.

[0037] like Figure 2 and Figure 3 As shown, in this embodiment, the active connecting rod 54 and the driven connecting rod 55 are respectively provided with shaft holes in the middle, and one side of the active connecting rod 54 and the driven connecting rod 55 are fitted together, and rivets are passed through the shaft holes to make the active connecting rod 54 and the driven connecting rod 55 rotatably connected.

[0038] The centering guide column 51 is a hexagonal column structure, and a hexagonal sliding groove is provided in the middle of the sliding block 53 corresponding to the centering guide column 51 to improve the sliding stability of the sliding block 53.

[0039] like Figure 2 and Figure 3 As shown, in this embodiment, a pusher for driving the slider 53 is also installed on the centering guide column 51, and the pusher includes a jacket 7 sleeved on the centering guide column 51, a handle 71 fixedly arranged at the lower end of the jacket 7, and a push rod 73 slidably installed on the jacket 7. The jacket 7 is provided with a locking knob 72 to fix the jacket 7 on the centering guide column 51. The jacket 7 is provided with a guide sleeve 74 corresponding to the push rod 73. The push rod 73 is slidably connected in the guide sleeve 74. One side of the push rod 73 is fixedly connected to the slider 53, and the other side is provided with a push handle 75 for easy pushing. Specifically, a person holds the handle 71 and pulls the push handle 75 to move, and the slider 53 is driven to move on the centering guide column 51 through the push rod 73. The connecting rod expands outward, so that the contact block 56 is against the inner wall of the blank pin hole 2, which is convenient for the person to operate with one hand.

[0040] like Figure 2 and Figure 3 As shown, in this embodiment, a support plate 57 is further provided at the outer end of the centering guide column 51. The support plate 57 is provided with an arc groove for placing the through rod 6. The outer end of the through rod 6 is provided with a handle 61 to facilitate personnel to push the through rod 6 to move.

[0041] like Figure 2 and Figure 3 As shown, in this embodiment, the outer ends of the fixed block 52 and the sliding block 53 are circular, and the outer end surface of the sliding block 53 is provided with a plurality of groups of first supports 58 distributed in an annular manner corresponding to the active connecting rod 54, and the active connecting rod 54 is rotatably connected to the first support 58, and the outer end surface of the fixed block 52 is provided with a plurality of groups of second supports 59 distributed in an annular manner corresponding to the driven connecting rod 55, and the driven connecting rod 55 is rotatably connected to the second support 59.

[0042] The first support 58 includes two groups of support plates arranged in parallel, and a rotation groove for accommodating the active connecting rod 54 is provided between the two groups of support plates. Support shafts are fixed on the two groups of support plates, and the support shafts pass through the openings corresponding to the active connecting rod 54 to enable the active connecting rod 54 to be rotatably connected to the first support 58; the second support 59 has the same structure as the first support 58.

[0043] The device can quickly open the connecting rod by pushing the slider 53 to move, and the contact block 56 is set against the inner wall of the pin hole 2 to realize the center positioning of the pin hole 2. The rod 6 is slidably set in the centering guide column 51, and whether the position of the pin hole 2 is qualified is judged by whether the rod 6 can be inserted into the detection through hole 4 on the profiling fixture 3, so as to realize rapid detection. The pusher is convenient for personnel to control the movement of the slider 53 with one hand, and the support plate 57 at the outer end of the centering guide column 51 is convenient for the placement of the rod 6. The personnel can push the rod 6 to move through the rod handle 61, so as to facilitate the personnel to control the movement of the rod 6.

[0044] The device uses a pass or fail method to determine whether the position of a piston blank 1 pin hole 2 is qualified or not. It is suitable for the detection of piston pin holes 2 with particularly large production volumes. It does not need to use a dial indicator to detect the specific position value, and can quickly determine whether the position of the pin hole 2 is qualified. The device has a simple structure, low cost of the inspection tool, easy installation, fast operation, and relatively accurate inspection, which can greatly improve the inspection efficiency. In addition, the device simplifies the determination of the position of the piston pin hole 2: there is no need to use three-coordinate point sampling, no need to use a dial indicator to measure the value, and it can accurately detect whether the position of the pin hole 2 is qualified, which can meet the needs of mass production of piston blanks 1.

[0045] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and the description only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will also have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents. It should be noted that in this article, if there are first and second relationship terms such as only used to distinguish one entity or operation from another entity or operation, it does not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or equipment. Without more constraints, an element defined by the phrase "comprising a..." does not exclude the existence of other identical elements in the process, method, article or apparatus comprising the element.

Claims

1. A through gauge for the position of a piston blank pin hole, characterized by: include: A piston blank, wherein a pin hole is arranged on the outer side of the piston blank, and the pin hole is a circular hole structure; A profiling fixture, which is used to position the piston blank, and a detection through hole is provided at a corresponding position of the profiling fixture; A centering mechanism, which includes a centering guide column and a connecting rod member arranged at the outer end of the centering guide column in an annular distribution, a fixed block is fixedly arranged on one side of the centering guide column, a sliding block is slidingly sleeved at the corresponding position of the centering guide column, a penetrating centering hole is arranged in the middle of the centering guide column, the connecting rod member includes an active connecting rod and a driven connecting rod arranged to rotate crosswise, and the outer ends of the active connecting rod and the driven connecting rod are respectively provided with contact blocks to abut against the inner wall of the pin hole, the side of the active connecting rod away from the contact block is rotatably mounted on the sliding block, and the side of the driven connecting rod away from the contact block is rotatably mounted on the fixed block; A through rod is inserted into the centering hole of the centering guide column and is slidably arranged in the centering hole.

2. A through gauge for measuring the position of a piston blank pin hole according to claim 1, characterized in that: The middle of the active connecting rod and the driven connecting rod are respectively provided with shaft holes, one side of the active connecting rod and the driven connecting rod are fitted together, and rivets are passed through the shaft holes to make the active connecting rod and the driven connecting rod rotatably connected.

3. A through gauge for measuring the position of a piston blank pin hole according to claim 2, characterized in that: The centering guide column is a hexagonal column structure, and a hexagonal sliding groove is provided in the middle of the sliding block corresponding to the centering guide column.

4. A through gauge for measuring the position of a piston blank pin hole according to claim 1, characterized in that: The centering guide column is also equipped with a pushing member for driving the slider to move. The pushing member includes a sleeve mounted on the centering guide column, a handle fixedly arranged at the lower end of the sleeve, and a push rod slidably mounted on the sleeve. The sleeve is provided with a locking knob to fix the sleeve on the centering guide column. The sleeve is provided with a guide sleeve corresponding to the push rod. The push rod is slidably connected in the guide sleeve. One side of the push rod is fixedly connected to the slider, and the other side is provided with a push handle for easy pushing.

5. A through gauge for measuring the position of a piston blank pin hole according to claim 1, characterized in that: The outer end of the centering guide column is also provided with a supporting plate, and the supporting plate is provided with an arc groove for placing a through rod, and the outer end of the through rod is provided with a rod handle.

6. A through gauge for measuring the position of a piston blank pin hole according to claim 2, characterized in that: The outer ends of the fixed block and the sliding block are circular, and the outer end surface of the sliding block is provided with a plurality of groups of first supports in a circular distribution corresponding to the active connecting rod, and the active connecting rod is rotatably connected to the first support, and the outer end surface of the fixed block is provided with a plurality of groups of second supports in a circular distribution corresponding to the driven connecting rod, and the driven connecting rod is rotatably connected to the second support.

7. A through gauge for measuring the position of a pin hole in a piston blank according to claim 6, characterized in that: The first support includes two groups of support plates arranged in parallel, and a rotation groove for accommodating the active connecting rod is provided between the two groups of support plates. Support shafts are fixedly provided on the two groups of support plates, and the support shafts pass through the openings corresponding to the active connecting rods, so that the active connecting rod is rotatably connected to the first support; the structure of the second support is consistent with that of the first support.

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