A mechanism for detecting the size of the center point of an axial arc surface of an interlocking rod

Abstract

The application belongs to the technical field of mechanical processing, and particularly relates to a mechanism for detecting the axial arc surface center point size of an interlocking rod. The mechanism mainly comprises a measurement standard base (1), the axial center of the measurement standard base (1) is consistent with the center size of each arc surface of the standard interlocking rod, each measurement standard base (1) comprises a center through hole, the measurement standard base (1) has a lateral positioning hole with a through hole on the side edge, which is used for installing a first wedge block (2), and has a top edge positioning hole with a through hole on the top edge, which is used for installing a second wedge block (3). The interlocking rod installed in the center through hole is adjusted through the two wedge blocks, the end of the interlocking rod is pressed against a touch screen instrument (4), and the size of the arc surface center of the interlocking rod (5) deviating from the axial center of the measurement standard base (1) is determined through the touch screen instrument. The application can quickly and accurately determine the axial size deviation of the four arc surface center points of the interlocking rod.

Description

Technical Field

[0001] This application belongs to the field of machining technology, specifically relating to a mechanism for detecting the size of the center point of the axial arc surface of an interlocking rod. Background Technology

[0002] The interlock lever is a component used in heavy-duty truck gearboxes. The component's dimensional requirements are as follows: Figure 1 As shown, the material is 8620H, the surface hardness requirement for the part is HRC58-63, the cyanide diffusion layer depth is 0.76-0.89, and the outer surface roughness requirement is Ra0.8. The axial dimensions of the neutral points of the four arc segments are as follows: The four curved surfaces are required to have a surface roughness of Ra0.8 and a runout of no more than 0.025mm. The function of this part is to: link the four shift fork shafts in the gearbox, pushing the curved surfaces to cause the interlocking rods to shift left and right, thereby pushing the push rod on the curved end face to act on the switch button, realizing the transmission of motion and on / off function information. Due to the product's structural characteristics, it is prone to bending and deformation after heat treatment; the radial dimension undulates in a stepped manner along the axial direction of the four curved surfaces, and the axial dimension of the center point of each of the four curved surfaces is a spatial position point, making conventional inspection methods inconvenient.

[0003] Due to the structural characteristics of the interlocking rod parts and the influence of surface hardness after heat treatment, vibrations are easily generated during the machining of the arc surface, resulting in unevenness and poor surface roughness of the four axial arc segments. This affects machining accuracy, including linear dimensions, surface runout tolerances, and symmetry tolerances. Currently, measurements can only be taken by randomly selecting points on the four arc segments using a coordinate measuring machine (CMM) or projector to generate virtual contour lines that intersect with the outer circle. This results in poor consistency in the dimensions from the center of the four arc segments to the vertex of the end arc surface when measured around the circumference, and significant differences in repeated measurements. Furthermore, CMM or projector measurements have drawbacks: long inspection cycles, distance from the production line, and severe impact on production cycle time. Therefore, the bottleneck problem of accurately measuring and promptly determining the center dimensions of the four arc segments online, and adjusting and controlling the machining programming, urgently needs to be solved. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a mechanism for detecting the center point dimensions of the axial arc surfaces of an interlocking rod, used to measure whether the axial dimensions of the center points of the four arc surfaces of the interlocking rod meet the design requirements.

[0005] The mechanism for detecting the center point dimension of the axial arc surface of the interlocking rod in this application mainly includes:

[0006] The base has four standard measuring bases, each of which is detachably mounted on the base. Each measuring base includes a central through hole, and the annular groove portion of the interlocking rod can be located within the through hole. Each measuring base has a lateral positioning hole on its side that connects to the through hole, and a top positioning hole on its top side that also connects to the through hole. After the four measuring bases are mounted on the base, the cross-sections at the axial center of the lateral positioning hole and the top positioning hole of each measuring base overlap. This cross-section is perpendicular to the axial direction of the interlocking rod, and the axial center serves as the axial center of the measuring base, which is consistent with the axial position of the center points of the four arc surfaces of the standard interlocking rod.

[0007] The first wedge block has an upper end face that is an arc-shaped structure that fits and conforms to the arc surface of the interlocking rod, and a lower end face that is divided into a wedge-shaped structure. The first wedge block is adapted to be inserted into the lateral positioning hole.

[0008] The second wedge block has an upper surface that is an arc-shaped structure that fits and conforms to the arc surface of the interlocking rod, and forms a wedge-shaped structure from one end to the other. The lower surface is a planar structure. The second wedge block is adapted to be inserted into the top edge positioning hole.

[0009] The touchscreen device is set at one end of the base. After the interlocking rod is installed on a measuring base, the arc structure of the first wedge block and the second wedge block drives the arc surface of the interlocking rod to move axially, so that the end of the interlocking rod abuts against the touchscreen device. Based on the result of the touchscreen device, the axial deviation of the center of the arc surface of the interlocking rod from the axial center of the measuring base is determined.

[0010] Preferably, four measuring bases are selectively installed on the base. When one of the measuring bases is installed on the base, the corresponding annular groove of the interlocking rod is located at the central through hole of the measuring base, and the portion of the interlocking rod outside the central through hole of the measuring base is supported by a V-groove.

[0011] Preferably, when the first measuring base is installed on the base, starting from the end closest to the touchscreen device, the annular groove at the leftmost end of the interlocking rod is located at the central through hole of the first measuring base, and the portion of the interlocking rod on the right side outside the central through hole of the measuring base is supported by a V-groove.

[0012] Preferably, when the second measuring base is installed on the base starting from the end closest to the touchscreen device, the second annular groove from the left end of the interlocking rod is located at the central through hole of the second measuring base, and the part of the interlocking rod on the right side outside the central through hole of the measuring base is supported by a V-groove.

[0013] Preferably, when the third measuring base is installed on the base starting from the end closest to the touchscreen device, the third annular groove from the left end of the interlocking rod is located at the central through hole of the third measuring base, and the part of the interlocking rod on the left side outside the central through hole of the measuring base is supported by a V-groove.

[0014] Preferably, when the fourth measuring base is installed on the base starting from the end closest to the touchscreen device, the fourth annular groove from the left end of the interlocking rod is located at the central through hole of the fourth measuring base, and the part of the interlocking rod on the left side outside the central through hole of the measuring base is supported by a V-groove.

[0015] This application simplifies the measurement of linear dimensions caused by unevenness and poor surface roughness of the four arc surfaces along the axial direction of the interlocking rod. It also avoids the cumbersome instrument measurement process and the misjudgment of the interlocking rod dimensions by selecting points and establishing lines during the measurement process. This application can quickly and accurately determine the deviation of the axial dimensions of the center points of the four arc surfaces of the interlocking rod. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the interlocking rod structure and dimensions.

[0017] Figure 2 This is a schematic diagram of a preferred embodiment of the mechanism for detecting the center point dimension of the axial arc surface of the interlocking rod in this application.

[0018] Figure 3 for Figure 2 Top view of the embodiment shown.

[0019] Figure 4 This is the main view of the first wedge block.

[0020] Figure 5 for Figure 4 The left view of the first wedge block shown.

[0021] Figure 6 This is the main view of the second wedge block.

[0022] Figure 7 for Figure 6 The left view of the second wedge shown.

[0023] Figure 8 The main view for measuring the second arc surface to install the second measuring base.

[0024] Figure 9 The second arc surface measurement main view is taken for the installation of the third measuring base.

[0025] Figure 10 The second arc surface measurement front view is taken for the installation of the fourth measuring base.

[0026] Among them, 1-measuring base, 2-first wedge block, 3-second wedge block, 4-touchscreen device, 5-interlocking rod. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0028] This application provides a mechanism for detecting the center point dimension of the axial arc surface of an interlocking rod, mainly comprising:

[0029] The base has four standard measuring bases 1, each of which is detachably mounted on the base. Each measuring base 1 includes a central through hole, and the part of the interlocking rod with an annular groove can be located in the through hole. Each measuring base 1 has a lateral positioning hole on its side that connects to the through hole, and a top positioning hole on its top side that connects to the through hole. After the four measuring bases are mounted on the base, the cross-sections where the lateral positioning holes and top positioning holes of each measuring base are located overlap. This cross-section is perpendicular to the axial direction of the interlocking rod, and the axial center serves as the axial center of the measuring base 1, which is consistent with the axial position of the center points of the four arc surfaces of the standard interlocking rod.

[0030] The first wedge block 2 has an upper end face that is an arc-shaped structure adapted to fit the arc surface of the interlocking rod, and a lower end face that is divided into a wedge-shaped structure. The first wedge block 2 is adapted to be inserted into the lateral positioning hole.

[0031] The second wedge block 3 has an upper surface that is an arc-shaped structure that fits and conforms to the arc surface of the interlocking rod, and forms a wedge-shaped structure from one end to the other. The lower surface is a planar structure. The second wedge block 3 is adapted to be inserted into the top edge positioning hole.

[0032] The touch screen device 4 is set at one end of the base. After the interlocking rod 5 is installed on a measuring base 1, the arc structure of the first wedge block 2 and the second wedge block 3 drives the arc surface of the interlocking rod 5 to move axially, so that the end of the interlocking rod 5 presses against the touch screen device. The size of the axial deviation of the center of the arc surface of the interlocking rod 5 from the axial center of the measuring base 1 is determined according to the result of the touch screen device.

[0033] refer to Figure 2 The first wedge 2 is inserted into the square hole on the front side, for reference. Figure 3 The second wedge 3 is inserted into the square hole on the top side, and the structure of the first wedge 2 is as follows: Figure 4 and Figure 5 As shown, the structure of the second wedge block 3 is as follows: Figure 6 and Figure 7 As shown, by using the first wedge block 2 and the second wedge block 3, which are embedded at a specific angle and are symmetrical, a transverse radial positioning and locking is performed to ensure the three-dimensional spatial symmetry requirements of the parts, so that the interlocking rod parts are supported in the central through hole of the measuring base 1, and the arc surface of the interlocking rod is in the designated position in the central through hole.

[0034] It is understandable that, since both the first wedge block 2 and the second wedge block 3 have arc-shaped structures that adapt to the arc surface of the interlocking rod, when the first wedge block 2 and the second wedge block 3 are inserted, the interlocking rod will move axially within the central through hole of the measuring base 1 through the mating arc surface. When the measuring base 1 moves axially within the central through hole, the end of the measuring base 1 will press against the touch screen device 4. The degree of pressing is measured by the touch screen device 4, which can then provide the axial movement distance of the interlocking rod 5. Since the position of the measuring base is preset, that is, the position of the measuring base on the base is set according to the axis position of the arc surface of the interlocking rod as the standard, when the interlocking rod 5 is pressed against it by 1mm by the touch screen device 4, it is considered that the center point of this arc surface of the interlocking rod 5 corresponding to the measuring base deviates from the design value by 1mm.

[0035] It should be noted that the center of the arc surface of the interlocking rod 5's annular groove has a straight, short axial extension section. Therefore, refer to... Figure 5 and Figure 7 The top of the arc-shaped structure of the first wedge block 2 and the second wedge block 3 has a straight edge with a length of 1.472 mm. In addition, when the interlocking rod 5 is processed, the axial dimension of the center point of each annular groove is the same around the circumference. Therefore, with the first wedge block 2 and the second wedge block 3 having arc-shaped structures, even if the interlocking rod 5 is rotated to different angles in the central through hole of the measuring standard base 1, the top of the arc-shaped structure of the first wedge block 2 and the second wedge block 3 can abut against the center of the lowest point of the arc surface of the annular groove of the interlocking rod 5, and the axial position of the interlocking rod 5 will not change due to rotation.

[0036] This application uses the display value of the touch screen device 4 to determine whether the axial position of the center point of each arc surface is within the design tolerance range, thereby reasonably avoiding the influence of unevenness and poor surface roughness of the four axial arc surfaces on the measurement of linear dimensions. It can accurately determine whether the interlocking shaft dimension is qualified and how much the deviation is, and adjust the machining program in time, thereby improving the accuracy of detection and the production efficiency of the interlocking rod.

[0037] In some alternative embodiments, four measuring bases 1 are selectively mounted on the base. When one of the measuring bases 1 is mounted on the base, the corresponding annular groove of the interlocking rod is located at the central through hole of the measuring base 1, and the portion of the interlocking rod 5 outside the central through hole of the measuring base 1 is supported by a V-groove.

[0038] In some alternative implementations, such as Figure 2 and Figure 3 As shown, starting from the end closest to the touchscreen device 4, when the first measuring base 1 is installed on the base, the annular groove at the leftmost end of the interlocking rod is located at the central through hole of the first measuring base 1, and the part of the interlocking rod 5 on the right side outside the central through hole of the measuring base 1 is supported by a V-groove.

[0039] In some alternative implementations, such as Figure 8 As shown, starting from the end closest to the touchscreen device 4, when the second measuring base 1 is installed on the base, the second annular groove from the left end of the interlocking rod is located at the central through hole of the second measuring base 1, and the part of the interlocking rod 5 on the right side outside the central through hole of the measuring base 1 is supported by a V-groove.

[0040] In some alternative implementations, such as Figure 9 As shown, starting from the end closest to the touchscreen device 4, when the third measuring base 1 is installed on the base, the third annular groove from the left end of the interlocking rod is located at the central through hole of the third measuring base 1, and the part of the interlocking rod 5 on the left side outside the central through hole of the measuring base 1 is supported by a V-groove.

[0041] In some alternative implementations, such as Figure 10 As shown, starting from the end closest to the touchscreen device 4, when the fourth measuring base 1 is installed on the base, the fourth annular groove from the left end of the interlocking rod is located at the central through hole of the fourth measuring base 1, and the part of the interlocking rod 5 on the left side outside the central through hole of the measuring base 1 is supported by a V-groove.

[0042] The dimensions of the second, third, and fourth annular grooves were accurately measured and determined using the method described above, thus improving measurement efficiency.

[0043] Although this application has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, such modifications or improvements made without departing from the spirit of this application are all within the scope of protection claimed in this application.

Claims

1. A mechanism for detecting the center point dimension of the axial arc surface of an interlocking rod, wherein the interlocking rod (5) has four annular grooves along the axial direction, and the cross-section of each annular groove is an arc surface, characterized in that, The mechanism for detecting the center point dimension of the axial arc surface of the interlocking rod includes: The base has four measuring bases (1), each measuring base (1) is detachably mounted on the base, each measuring base (1) includes a central through hole, the part of the interlocking rod with an annular groove can be located in the through hole, the measuring base (1) has a lateral positioning hole on the side that connects to the through hole, and a top positioning hole on the top that connects to the through hole. After the four measuring bases are mounted on the base, the cross section where the axial position center of the lateral positioning hole of each measuring base is located overlaps with the cross section where the axial position center of the top positioning hole is located. This cross section is perpendicular to the axial direction of the interlocking rod, and the axial position center is the axial center of the measuring base (1), which is consistent with the axial position of the center point of the four arc surfaces of the standard interlocking rod. The first wedge block (2) has an upper end face that is an arc-shaped structure that fits the arc surface of the interlocking rod, and a lower end face that is divided into a wedge-shaped structure. The first wedge block (2) is adapted to be inserted into the lateral positioning hole. The second wedge block (3) has an upper surface that is an arc-shaped structure that fits the arc surface of the interlocking rod and forms a wedge-shaped structure from one end to the other. The lower surface is a planar structure. The second wedge block (3) is adapted to be inserted into the top edge positioning hole. The touch screen device (4) is set at one end of the base. After the interlocking rod (5) is installed on a measuring base (1), the arc structure of the first wedge block (2) and the second wedge block (3) drives the arc surface of the interlocking rod (5) to move axially, so that the end of the interlocking rod (5) presses against the touch screen device. The size of the center of the arc surface of the interlocking rod (5) deviating axially from the axial center of the measuring base (1) is determined according to the result of the touch screen device.

2. The mechanism for detecting the center point dimension of the axial arc surface of the interlocking rod as described in claim 1, characterized in that, Four measuring bases (1) are selectively installed on the base. When one of the measuring bases (1) is installed on the base, the corresponding annular groove of the interlocking rod is located at the central through hole of the measuring base (1), and the part of the interlocking rod (5) outside the central through hole of the measuring base (1) is supported by a V-groove.

3. The mechanism for detecting the center point dimension of the axial arc surface of the interlocking rod as described in claim 2, characterized in that, Starting from the end closest to the touchscreen device (4), when the first measuring base (1) is installed on the base, the annular groove at the leftmost end of the interlocking rod is located at the central through hole of the first measuring base (1), and the part of the interlocking rod (5) on the right side outside the central through hole of the measuring base (1) is supported by a V-groove.

4. The mechanism for detecting the center point dimension of the axial arc surface of the interlocking rod as described in claim 2, characterized in that, Starting from the end closest to the touchscreen device (4), when the second measuring base (1) is installed on the base, the second annular groove from the left end of the interlocking rod is located at the central through hole of the second measuring base (1), and the part of the interlocking rod (5) on the right side outside the central through hole of the measuring base (1) is supported by a V-groove.

5. The mechanism for detecting the center point dimension of the axial arc surface of the interlocking rod as described in claim 2, characterized in that, Starting from the end closest to the touchscreen device (4), when the third measuring base (1) is installed on the base, the third annular groove from the left end of the interlocking rod is located at the central through hole of the third measuring base (1), and the part of the interlocking rod (5) on the left side outside the central through hole of the measuring base (1) is supported by a V-groove.

6. The mechanism for detecting the center point dimension of the axial arc surface of the interlocking rod as described in claim 2, characterized in that, Starting from the end closest to the touchscreen device (4), when the fourth measuring base (1) is installed on the base, the fourth annular groove from the left end of the interlocking rod is located at the central through hole of the fourth measuring base (1), and the part of the interlocking rod (5) on the left side outside the central through hole of the measuring base (1) is supported by a V-groove.

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