A shaft hole inspection fixture

Abstract

This utility model discloses a shaft hole inspection fixture, relating to the field of shaft part inspection technology. It includes a workpiece body, a three-coordinate worktable, a positioning structure, and a clamping structure. The three-coordinate worktable comprises a planar structure and a gantry structure, with the gantry structure mounted on top of the planar structure and a probe structure installed at the bottom. Through the combined action of the positioning and clamping structures, this shaft hole inspection fixture maintains the workpiece body perpendicular to the worktable body while ensuring stable installation. This effectively improves the vertical clamping accuracy of the workpiece body and reduces errors in the detection of hole diameter and position on the workpiece. Furthermore, multiple bases can be simultaneously installed on the worktable body, and by adjusting the position of the support columns on the bases, interference between workpiece bodies clamped at different positions can be avoided. This facilitates the inspection of multiple workpiece bodies by the three-coordinate worktable, effectively improving inspection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of shaft parts inspection technology, and more specifically, to a shaft hole inspection fixture. Background Technology

[0002] Shafts are among the most important components in mechanical equipment, and are key parts affecting the precision and lifespan of such equipment. They are mainly used to support rotating parts, such as gears and pulleys, and to transmit motion and torque. With the continuous advancement of industrial modernization, the application prospects of shafts are becoming increasingly broad. After production, existing shafts must be shipped only after ensuring there are no abnormalities; the size and geometry of the bore are crucial to the function and applicability of these shafts.

[0003] After production, existing shaft-type workpieces are usually inspected using a coordinate measuring machine (CMM). This involves using a CMM to inspect and measure the hole diameter and position of the workpiece. While CMM can achieve accurate measurements, it is time-consuming and cumbersome. It is not only inefficient but also requires highly skilled operators. When clamping parts for inspection, it is difficult for operators to control the perpendicularity of the parts. Each operator may clamp parts for inspection in either perpendicular or non-perpendicular positions, resulting in errors in the inspection data. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a shaft hole inspection fixture that improves the vertical clamping accuracy of the workpiece by optimizing the clamping and fixing structure, reduces the difficulty of clamping the workpiece, and enables the worktable to meet the simultaneous clamping requirements of multiple workpieces, thereby effectively reducing the inspection error of the workpiece and improving the inspection efficiency.

[0005] To achieve the above objectives, this utility model provides a shaft hole inspection fixture, including a workpiece body, and further comprising: A three-coordinate measuring machine includes a planar structure and a gantry structure mounted on top of the planar structure, with a probe structure mounted at the bottom of the gantry structure; The positioning structure includes several bases mounted on the top of the planar structure and support columns mounted on the top of the bases, with the workpiece body vertically placed on the top surface of the support columns; The clamping structure includes a fixed rear end mounted on the top of the support column and located on one side of the workpiece body, a fixed front end mounted on the fixed rear end and located on the other side of the workpiece body, and a limiting structure with a horizontal thread passing through the fixed front end. The fixed rear end is provided with a V-groove corresponding to the position of the limiting structure on the side near the support column. The positioning structure and the clamping structure work together to mount multiple workpiece bodies on the planar structure, making the workpiece bodies perpendicular to the planar structure. This allows the probe structure to detect the aperture and position of the workpiece bodies at different locations by adjusting the position of the gantry structure on the three-coordinate worktable.

[0006] Furthermore, the planar structure includes a support frame and a worktable body mounted on top of the support frame.

[0007] Furthermore, the gantry structure includes a longitudinal slide table installed on the top of the support frame, a vertical plate slidably installed on the top of the longitudinal slide table, a transverse slide rail horizontally installed on the vertical plate and located above the workbench body, a vertical slide rail slidably installed on the transverse slide rail, and a vertical slide rod slidably installed on the vertical slide rail, with the probe structure installed at the bottom end of the vertical slide rod.

[0008] Furthermore, the top of the base has mounting elongated holes on both sides along the length of the top surface of the base, and the bottom surface of the base has a connecting groove in the middle. The connecting groove is rectangular, and the top of the base has several connecting through holes corresponding to the positions of the connecting groove.

[0009] Furthermore, a second connecting screw is vertically inserted through the mounting elongated hole at the top of the base, and the second connecting screw is threadedly connected to the workbench body. A plurality of first connecting screws located in the connecting groove are vertically inserted at the bottom of the base, and the first connecting screws are threadedly connected to the support column through the connecting through hole.

[0010] Furthermore, a bayonet groove is provided on the side of the fixed rear end near the fixed front end, located on both sides in the width direction of the fixed rear end. The bayonet groove includes a positioning part and a locking part. The positioning part is located on the side of the fixed rear end near the fixed front end, and the locking part is located on the side of the positioning part away from the fixed front end.

[0011] Furthermore, the fixed rear end is U-shaped, and the inner wall size of the fixed rear end is adapted to the size and width of the positioning part on the fixed rear end. Positioning blocks are provided at both ends of the fixed rear end near the inside. When the fixed front end and the fixed rear end are installed, the positioning blocks are located in the engaging part of the fixed rear end to allow the fixed rear end and the fixed front end to slide vertically.

[0012] Furthermore, two countersunk holes are vertically formed at the top of the fixed front end, and a third connecting screw is installed at the top of the fixed front end, passing through the countersunk holes and threaded to the top of the support column.

[0013] Furthermore, the limiting structure includes a threaded rod with a horizontal thread installed in the fixed rear end and a stop block installed on the threaded rod near the fixed front end.

[0014] Compared with the prior art, this utility model has the following advantages and effects: 1. The shaft hole inspection fixture in this utility model, through the combined action of the positioning structure and the clamping structure, can maintain the perpendicularity between the workpiece body and the worktable body while ensuring the stable installation of the workpiece body. This effectively improves the vertical clamping accuracy of the workpiece body and further reduces the detection error of the hole diameter and position on the workpiece. In addition, multiple bases can be installed on the worktable body at the same time, and by adjusting the position of the support column on the base, interference between workpiece bodies clamped at different positions can be avoided. This facilitates the inspection of multiple workpiece bodies by the three-coordinate worktable and effectively improves the inspection efficiency.

[0015] 2. The shaft hole inspection fixture in this utility model achieves the clamping and fixing of the workpiece body through the cooperation of the fixed front end and the fixed rear end. The structure of the fixed front end and the fixed rear end is simple and easy to operate. The clamping operation can be completed with one hand, which greatly reduces the clamping time of the workpiece body and can further improve the inspection efficiency. Attached Figure Description

[0016] Figure 1 This is a front view schematic diagram of the shaft hole detection fixture in an embodiment of this utility model; Figure 2 This is a schematic diagram of the connection structure of the base, support column, fixed rear end and fixed front end of the shaft hole detection fixture in this embodiment of the present invention; Figure 3 This is a schematic diagram of the base bottom structure of the shaft hole detection fixture in this embodiment of the present invention; Figure 4 This is a top view of the shaft hole detection fixture after removing the workpiece body in an embodiment of this utility model. Figure 5 for Figure 4 Schematic diagram of the structure at point AA; Figure 6 This is a top view of the fixed front end of the shaft hole detection fixture in an embodiment of this utility model.

[0017] Explanation of reference numerals in the attached figures: 1-Base; 11-Mounting elongated hole; 12-Connecting groove; 13-Connecting through hole; 14-First connecting screw; 15-Second connecting screw; 2-Supporting column; 3-Fixed backend; 31-V-groove; 32-Bayonet groove; 321-Positioning part; 322-Engaging part; 33-Third connecting screw; 34-Counterhead hole; 4-Workpiece body; 5-Fixed front end; 51-Location Card Block; 6-Limiting structure; 61-Threaded rod; 62-Abutment; 7-Three-coordinate worktable; 71-Support frame; 72-Workbench body; 73-Longitudinal slide; 74-Vertical plate; 75-Transverse slide rail; 76-Vertical slide rail; 77-Vertical slide rod; 8-Probe structure. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Please see Figure 1-6 As shown, this utility model embodiment provides a shaft hole inspection fixture, including a workpiece body 4, a three-coordinate worktable 7, a positioning structure, and a clamping structure.

[0021] The coordinate measuring machine table 7 includes a planar structure and a gantry structure. The gantry structure is installed on top of the planar structure, and a probe structure 8 is installed at the bottom of the gantry structure to drive the probe structure 8 to move directly above the planar structure.

[0022] The positioning structure includes a base 1 and a support column 2. Several bases 1 are installed on the top of the planar structure, and the support column 2 is installed on the top of the base 1. The workpiece body 4 is placed vertically on the top surface of the support column 2 to maintain the perpendicularity of the support column 2 to the planar structure on the three-coordinate worktable 7, so that the workpiece body 4 is perpendicular to the planar structure on the three-coordinate worktable 7 when it is installed.

[0023] The clamping structure includes a fixed rear end 3, a fixed front end 5, and a limiting structure 6. The fixed rear end 3 is installed on the top of the support column 2 and located on one side of the workpiece body 4. The fixed front end 5 is installed on the fixed rear end 3 and located on the other side of the workpiece body 4. The limiting structure 6 is threaded horizontally through the fixed front end 5. The fixed rear end 3 has a V-groove 31 on the side near the support column 2 that corresponds to the position of the limiting structure 6, so that the V-groove 31 of the limiting structure 6 can clamp the workpiece body 4, thereby maintaining the installation stability of the workpiece body 4 without affecting the perpendicularity of the workpiece body 4 to the plane structure on the three-coordinate worktable 7.

[0024] The positioning structure and clamping structure work together to mount multiple workpiece bodies 4 on the planar structure and make the workpiece bodies 4 perpendicular to the planar structure, so that the probe structure 8 can perform hole diameter and position measurement on the workpiece bodies 4 at different positions by adjusting the position of the gantry structure on the three-coordinate worktable 7.

[0025] Please see Figure 1 As shown, the planar structure includes a support frame 71 and a worktable body 72, and the worktable body 72 is fixedly installed on the top of the support frame 71; the arrangement of the worktable body 72 makes the installation of the base 1 convenient.

[0026] Please see Figure 1 As shown, the gantry structure includes a longitudinal slide table 73, a vertical plate 74, a transverse slide rail 75, a vertical slide rail 76, and a vertical slide rod 77. The longitudinal slide table 73 is mounted on top of the support frame 71. The vertical plate 74 is slidably mounted on top of the longitudinal slide table 73. The transverse slide rail 75 is horizontally mounted on the vertical plate 74 and located above the worktable body 72. The vertical slide rail 76 is vertically slidably mounted on the transverse slide rail 75. The vertical slide rod 77 is slidably mounted on the vertical slide rail 76. The probe structure 8 is mounted at the bottom of the vertical slide rod 77. The longitudinal position of the vertical plate 74 and the transverse slide rail 75 can be adjusted by operating the longitudinal slide table 73. The transverse slide rail 75 can be used to adjust the transverse position of the vertical slide rail 76. The vertical slide rail 76 can be used to adjust the position of the vertical slide rod 77. By controlling the longitudinal slide table 73, the transverse slide rail 75, and the vertical slide rail 76, the position of the probe structure 8 on the vertical slide rod 77 can be precisely adjusted.

[0027] As a further description of the above scheme, the worktable body 72 is equipped with a control component for controlling the operation of the longitudinal slide 73, the transverse slide rail 75 and the vertical slide rail 76.

[0028] Please see Figure 1-5As shown, the top of the base 1 has mounting elongated holes 11 on both sides along the length of the top surface of the base 1. A second connecting screw 15 passes vertically through the mounting elongated holes 11 on the top of the base 1, and the second connecting screw 15 is threadedly connected to the workbench body 72. This facilitates the installation of the base 1 onto the workbench body 72 using the provided second connecting screw 15, and maintains the stability of the base 1.

[0029] Please see Figure 3 and Figure 5 As shown, a connecting groove 12 is provided in the middle of the bottom surface of the base 1. The connecting groove 12 is rectangular. Several connecting through holes 13 corresponding to the positions of the connecting groove 12 are provided at the top of the base 1. Several first connecting screws 14 located in the connecting groove 12 are vertically inserted at the bottom of the base 1. The first connecting screws 14 pass through the connecting through holes 13 and are threadedly connected to the support column 2. This facilitates the connection and fixation of the support column 2 and the base 1 by using the first connecting screws 14. The connecting groove 12 can prevent the end of the first connecting screw 14 from contacting the workbench body 72, thus maintaining the fit between the base 1 and the workbench body 72, making the base 1 parallel to the workbench body 72, and making the installed support column 2 perpendicular to the base 1.

[0030] Please see Figure 2 , Figure 4 and Figure 6 As shown, a bayonet groove 32 is provided on both sides of the fixed rear end 3 in the width direction of the fixed front end 5 on the side of the fixed rear end 3. The bayonet groove 32 includes a positioning part 321 and a locking part 322. The positioning part 321 is located on the side of the fixed rear end 3 near the fixed front end 5, and the locking part 322 is located on the side of the positioning part 321 away from the fixed front end 5.

[0031] Please see Figure 2-4 As shown, the fixed rear end 3 is U-shaped, and the inner wall size of the fixed rear end 3 is adapted to the size and width of the positioning part 321 on the fixed rear end 3. Positioning blocks 51 are provided at both ends of the fixed rear end 3 near the inside. When the fixed front end 5 and the fixed rear end 3 are installed, the positioning blocks 51 are located in the engaging part 322 of the fixed rear end 3 to allow the fixed rear end 3 and the fixed front end 5 to slide vertically. The positioning part 321 on the fixed rear end 3 is used to restrict the movement of the fixed rear end 3 along the width direction of the fixed rear end 3. The positioning blocks 51 placed in the engaging part 322 of the fixed rear end 3 can prevent the fixed front end 5 from disengaging from the fixed rear end 3 due to movement along the length direction of the fixed rear end 3.

[0032] Please see Figure 2 , Figure 4 and Figure 6As shown, two countersunk holes 34 are vertically opened on the top of the fixed front end 5. A third connecting screw 33 is installed on the top of the fixed front end 5, which passes through the countersunk holes 34 and is threaded to the top of the support column 2. This allows the fixed front end 5 to be installed on the top of the support column 2 using the third connecting screw 33, so that the fixed front end 5 is parallel to the worktable body 72.

[0033] Please see Figure 5 As shown, the limiting structure 6 includes a threaded rod 61 with a horizontal thread installed in the fixed rear end 3 and a stop block 62 installed on the side of the threaded rod 61 near the fixed front end 5; the rotation of the threaded rod 61 can drive the stop block 62 to move laterally, thereby facilitating the adjustment of the position of the stop block 62 according to the size of the workpiece body 4, so that the stop block 62 can cooperate with the V-groove 31 provided on the fixed rear end 3 to clamp the workpiece body 4.

[0034] As a preferred embodiment of the above solution, the abutment 62 can be used to prevent the workpiece body 4 to be inspected from being scratched due to rigid contact. In this embodiment, the abutment 62 is a copper cap.

[0035] The working process of the above-mentioned shaft hole inspection fixture is as follows: When installing this shaft hole inspection fixture, firstly, the support column 2 needs to be installed onto the base 1 using the first connecting screw 14. Then, the base 1 needs to be installed onto the worktable body 72 using the second connecting screw 15. By keeping the base 1 and the worktable body 72 in contact, the support column 2 can be ensured to be perpendicular to the worktable body 72. After that, the fixing front end 5 needs to be installed onto the top of the support column 2 using the third connecting screw 33, so that the fixing front end 5 is set parallel to the worktable body 72. Finally, the fixing front end 5 is snapped onto the side of the fixing rear end 3 with the V-groove 31 to complete the assembly of the inspection fixture. In use, the workpiece body 4 to be inspected needs to be placed vertically between the fixed front end 5 and the fixed rear end 3. While ensuring that the bottom surface of the workpiece body 4 is in contact with the top surface of the support column 2, the threaded rod 61 is rotated to allow the abutment 62 to move closer to the fixed rear end 3. This facilitates the abutment 62 to cooperate with the V-groove 31 on the fixed rear end 3 to clamp the workpiece body 4, thereby achieving the vertical installation of the workpiece body 4. After that, simply operate the longitudinal slide 73, the transverse slide rail 75 and the vertical slide rail 76 on the coordinate measuring machine table 7 respectively, and move the vertical slide rod 77 to move the probe structure 8 to the top of the workpiece body 4 to achieve the detection of the hole diameter and position of the workpiece body 4. Multiple tooling structures can be installed on the workbench body 72 to facilitate the simultaneous inspection of multiple workpiece bodies 4, effectively improving inspection efficiency. During this process, the position of the support column 2 on the base 1 can be adjusted to prevent the tooling structure from interfering with tooling structures in other positions.

[0036] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A shaft hole detection tool comprising a workpiece body (4), characterized by, Also includes: The three-coordinate worktable (7) includes a planar structure and a gantry structure installed on top of the planar structure, and a probe structure (8) is installed at the bottom end of the gantry structure. The positioning structure includes several bases (1) installed on the top of the planar structure and support columns (2) installed on the top of the bases (1), and the workpiece body (4) is vertically placed on the top surface of the support columns (2); The clamping structure includes a fixed rear end (3) installed on the top of the support column (2) and located on one side of the workpiece body (4), a fixed front end (5) installed on the fixed rear end (3) and located on the other side of the workpiece body (4), and a limiting structure (6) with a horizontal thread passing through the fixed front end (5). The fixed rear end (3) has a V-groove (31) on the side near the support column (2) that corresponds to the position of the limiting structure (6). The positioning structure and the clamping structure work together to mount multiple workpiece bodies (4) on the planar structure and make the workpiece bodies (4) perpendicular to the planar structure, so that the probe structure (8) can detect the aperture and position of the workpiece bodies (4) at different positions by adjusting the position of the gantry structure on the three-coordinate worktable (7).

2. The bore inspection tool of claim 1, wherein, The planar structure includes a support frame (71) and a worktable body (72) mounted on top of the support frame (71).

3. The shaft hole inspection fixture according to claim 2, characterized in that, The gantry structure includes a longitudinal slide (73) mounted on the top of the support frame (71), a vertical plate (74) slidably mounted on the top of the longitudinal slide (73), a transverse slide rail (75) horizontally mounted on the vertical plate (74) and located above the workbench body (72), a vertical slide rail (76) vertically slidably mounted on the transverse slide rail (75), and a vertical slide rod (77) slidably mounted on the vertical slide rail (76). The probe structure (8) is mounted on the bottom end of the vertical slide rod (77).

4. The shaft hole inspection fixture according to claim 3, characterized in that, The base (1) has mounting holes (11) on both sides of the top surface of the base (1) along the length direction. The base (1) has a connecting groove (12) in the middle of the bottom surface. The connecting groove (12) is rectangular. The base (1) has several connecting through holes (13) at the top that correspond to the positions of the connecting groove (12).

5. The shaft hole inspection fixture according to claim 4, characterized in that, The top of the base (1) is vertically provided with a second connecting screw (15) that passes through the mounting elongated hole (11), and the second connecting screw (15) is threadedly connected to the workbench body (72). The bottom of the base (1) is vertically provided with a plurality of first connecting screws (14) located in the connecting groove (12), and the first connecting screws (14) pass through the connecting through hole (13) and are threadedly connected to the support column (2).

6. The shaft hole inspection fixture according to claim 1, characterized in that, The fixed rear end (3) has a bayonet groove (32) on both sides of the fixed rear end (3) in the width direction. The bayonet groove (32) includes a positioning part (321) and a locking part (322). The positioning part (321) is located on the side of the fixed rear end (3) near the fixed front end (5), and the locking part (322) is located on the side of the positioning part (321) away from the fixed front end (5).

7. The shaft hole inspection fixture according to claim 6, characterized in that, The fixed rear end (3) is U-shaped. The inner wall size of the fixed rear end (3) is adapted to the size and width of the positioning part (321) on the fixed rear end (3). Positioning blocks (51) are provided at both ends of the fixed rear end (3) near the inside. When the fixed front end (5) and the fixed rear end (3) are installed, the positioning blocks (51) are located in the engaging part (322) of the fixed rear end (3) to make the fixed rear end (3) and the fixed front end (5) slide vertically.

8. The shaft hole inspection fixture according to claim 1, characterized in that, The top of the fixed front end (5) has two countersunk holes (34) vertically opened, and the top of the fixed front end (5) is fitted with a third connecting screw (33) that passes through the countersunk holes (34) and is threaded to the top of the support column (2).

9. The shaft hole inspection fixture according to claim 1, characterized in that, The limiting structure (6) includes a threaded rod (61) with a horizontal thread installed in the fixed rear end (3) and a stop block (62) installed on the side of the threaded rod (61) near the fixed front end (5).

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