A three-coordinate fixture suitable for measuring the ferrule of oil pump neutron parts

Abstract

The present invention relates to a three-coordinate fixture suitable for measuring the ferrule of a neutron part of an oil pump, which comprises a base, a main rod, a support rod, a pressure frame and a pressure nut. The main rod is provided with a lifting frame and a locking member for limiting the movement of the lifting frame. The lifting frame is connected with a plurality of support columns, which correspond to the mounting grooves on the second ferrule one by one. The top of the support column is provided with a support step. When installed, the height of the top of the support column is higher than the height of the top of the support rod. The support column passes through the mounting groove of the second ferrule, and the support step fits the connecting plate. The pressure frame is provided on the second ferrule, and the pressure nut is threadedly engaged on the main rod and contacts the pressure frame. The present invention has the effect of improving the applicability of the three-coordinate fixture.

Description

Technical Field

[0001] The invention relates to the technical field of fixtures, in particular to a three-coordinate fixture suitable for measuring a ferrule of a neutron part of an oil pump. Background Art

[0002] A three-dimensional fixture is a clamping device used on a coordinate measuring machine (CMM). It securely holds the workpiece to the CMM's workbench. A CMM is a precision instrument used to measure the three-dimensional coordinates of an object, thereby determining its geometric size, shape, and position.

[0003] Reference Figure 1 The figure discloses a first ferrule 01 and a simple fixture for clamping the first ferrule 01, wherein the first ferrule 01 is a circular ring-shaped part. The simple fixture includes a base 1, a main rod 11, a support rod 12, a pressure frame 13, and a pressure nut 14. The support rods 12 and the main rod 11 are fixedly connected to the base 1, and three support rods 12 are provided. The first ferrule 01 is placed on the three support rods 12, the pressure frame 13 is set on the first ferrule 01, and the pressure nut 14 is threadedly engaged with the main rod 11 and pressed against the pressure frame 13.

[0004] Reference Figure 2 The figure discloses a second ferrule 02 , the bottom of the second ferrule 02 is open, a plurality of mounting grooves 021 are opened on the second ferrule 02 , and a connecting plate 022 is fixedly connected to the mounting groove 021 .

[0005] In the prior art, a support rod is used to contact the arc wall of the first ferrule, and a pressure nut is used to apply pressure to the pressure frame to secure the first ferrule on the simple fixture. However, this simple fixture can only be used to clamp the first ferrule. Due to the opening on the bottom wall of the second ferrule, the support rod cannot effectively support it. In this way, the simple fixture cannot stably restrict the second ferrule. The simple fixture is only suitable for the first ferrule, which reduces the applicability of the simple fixture. Summary of the Invention

[0006] In order to improve the applicability of a three-coordinate fixture, the present application provides a three-coordinate fixture suitable for measuring a ferrule of a neutron part of an oil pump.

[0007] This application provides a three-coordinate fixture suitable for measuring the ferrule of oil pump neutron parts, which adopts the following technical solutions:

[0008] A three-coordinate fixture suitable for measuring the ferrule of a neutron part of an oil pump, comprising a base, a main rod, a support rod, a pressure frame and a pressure nut. The main rod is provided with a lifting frame and a locking piece that limits the movement of the lifting frame. A plurality of support columns are connected to the lifting frame. The support columns correspond one-to-one to the mounting grooves on the second ferrule. The top ends of the support columns are provided with support steps. When installed, the height of the top ends of the support columns is higher than the height of the top ends of the support rods. The support columns pass through the mounting grooves of the second ferrule, and the support steps fit the connecting plate. The pressure frame is provided on the second ferrule. The pressure nut is threadedly engaged with the main rod and contacts the pressure frame.

[0009] By adopting the above technical solution, when clamping the second ferrule, the operator places the second ferrule on the top of the support column, the support column passes through the installation slot, the support step contacts the bottom wall of the second ferrule, and the side wall of the support step fits the connecting plate. Then, the pressure frame is placed on the main rod and contacts the second ferrule. Finally, the pressure nut is rotated to contact the second ferrule, thereby achieving the installation of the second ferrule. The operator uses the support step to contact the bottom wall of the second ferrule to ensure the horizontality of the second ferrule. At the same time, the side wall of the support step fits the connecting plate to limit the position of the second ferrule and ensure that the center of the second ferrule coincides with the axis of the main rod. Finally, the pressure frame is used to press the second ferrule, thereby limiting the degree of freedom of the second ferrule. The operator uses the support rod and the pressure frame to achieve the clamping of the first ferrule. The cooperation between the support step and the installation slot and the pressure of the pressure frame achieves the clamping of the second ferrule. Compared with the simple clamp in the prior art, the three-coordinate clamp can be applied to the clamping of the first and second ferrules, thereby improving the applicability of the three-coordinate clamp.

[0010] Optionally, the locking member is a locking bolt, the lifting frame is vertically slidably fitted on the main rod, the locking member passes through the lifting frame and presses against the main rod, and the locking member is threadedly fitted with the lifting frame.

[0011] By adopting the above technical solution, when adjusting the height of the lifting frame, the operator raises the lifting frame until the height of the top of the support column is higher than the height of the top of the support rod, and then rotates the locking piece to make the locking piece press against the main rod, thereby achieving the effect of locking the lifting frame.

[0012] Optionally, the locking member is an adjusting screw, and a lifting hole and an avoidance gap are opened on the main rod. The avoidance gap is connected to the inside of the lifting hole. The locking member is rotatably connected in the lifting hole. A connecting part is connected to the lifting frame. The connecting part slides in the lifting hole and is threadedly engaged with the locking member.

[0013] By adopting the above technical solution, when adjusting the height of the lifting frame, the operator rotates the locking piece, and through the cooperation between the locking piece and the connecting part and the cooperation between the lifting frame and the avoidance gap, the lifting frame is raised in its original state until the top height of the support column is higher than the top height of the support rod, thereby realizing the height adjustment of the lifting frame.

[0014] Optionally, an adjustment mechanism is provided between the base and the pressure frame, the adjustment mechanism includes a detection component and a fine-tuning component for fine-tuning the local height of the second ferrule, the detection component includes a detection frame, a lifting column and a wire gauge, the detection frame is detachably connected to one side of the base, the top end of the detection frame is rotatably connected to a rotating ring, the lifting column passes through the rotating ring, a limiting groove is opened on the lifting column, a limiting block is connected to the rotating ring, the limiting block slides in the limiting groove, the wire gauge is connected to the bottom end of the lifting column, during detection, the lifting column is aligned with the main rod, and the detection end of the wire gauge contacts the top wall of the second ferrule.

[0015] By adopting the above technical solution, when installing the first ferrule, although the pressure frame applies pressure to the first ferrule, which can assist in leveling the first ferrule, since the first ferrule is a single-walled part, there is a possibility of deformation under force when pressure is applied. In this way, the three-coordinate device will be affected when detecting the surface size of the first ferrule, reducing the detection accuracy of the first ferrule. The operator half-tightens the pressure nut, then installs the detection frame on the base, so that the detection end of the wire gauge contacts the top wall of the first ferrule, rotates the lifting column, and drives the detection end of the wire gauge to rotate. During the rotation process, the lifting column is raised to avoid the pressure frame. Based on the measured data, the local height of the first ferrule is fine-tuned using the fine-tuning component. After the levelness error is within the specified range, the pressure nut is finally tightened to achieve the effect of fine-tuning the local height of the first ferrule, ensuring the detection accuracy of the first ferrule.

[0016] Optionally, the detection frame includes a support frame and a rotating frame, the support frame is detachably connected to one side of the base, the rotating frame is rotatably connected to the top of the support frame, the lifting column is arranged on the rotating frame, and the support frame is provided with a limiting component for limiting the angle of the rotating frame.

[0017] By adopting the above technical solution, when the operator uses the three-coordinate equipment to detect the first ferrule, he can rotate the rotating frame to move the wire table out of the detection range of the first ferrule, thereby achieving the effect of smoothly detecting the first ferrule without removing the detection frame, eliminating the step of disassembling the detection frame, and providing convenience for the detection of the first ferrule.

[0018] Optionally, the limiting assembly includes a limiting column, a toggle block and an ejection spring. A plurality of vertical holes are opened at the top of the support frame. The limiting column slides in the vertical hole. The toggle block is connected to the bottom end of the limiting column. The toggle block is partially located outside the vertical hole. The ejection spring is arranged in the vertical hole and is located between the limiting column and the bottom end of the vertical hole. A limiting hole is opened at the bottom end of the rotating frame at the position corresponding to the limiting column. When the limiting column is inserted into the limiting hole, the lifting column is aligned with the main rod.

[0019] By employing this technical solution, the operator uses the limiting post to limit the turret's angle, ensuring that the lifting post is aligned with the main rod when inspecting the first ferrule. After the first ferrule is clamped, the operator presses the toggle block to lower the limiting post, disengaging it from the limiting hole. This allows the turret to be rotated to remove the wire gauge.

[0020] Optionally, the fine-tuning assembly includes a pressure block, a toggle circular plate, a fine-tuning rod and a connecting block, the toggle circular plate is rotatably connected to the pressure frame, a fine-tuning hole is opened on the pressure frame, the connecting block is connected to the hole wall of the fine-tuning hole, the fine-tuning rod is passed through the fine-tuning hole, a sliding groove is opened on the fine-tuning rod, the connecting block slides in conjunction with the sliding groove, the pressure block slides in conjunction with the pressure frame, and is connected to the bottom end of the fine-tuning rod. When fine-tuning the local position of the second ferrule, the pressure block contacts the top wall of the second ferrule.

[0021] By adopting the above technical solution, when fine-tuning the local height of the first ferrule, the operator turns the toggle circular plate at the corresponding position according to the data measured by the wire gauge, and through the cooperation between the connecting block and the sliding groove and the toggle circular plate and the fine-tuning rod, the fine-tuning rod is lowered from its original state, driving the pressure block to descend, thereby achieving the effect of adjusting the height of the corresponding position of the first ferrule.

[0022] Optionally, the top end of the support rod is connected to a connecting sleeve, the connecting sleeve is connected to a support block, and the support block is provided with a resisting arc surface. When supporting the first ferrule, the resisting arc surface fits the arc wall of the first ferrule.

[0023] With this technical solution, the support rod and the arcuate wall of the first ferrule only make point contact, which could damage the surface of the first ferrule and cause unstable installation during installation. The operator uses the arcuate surface on the support block to contact the arcuate wall of the first ferrule. This increases the contact area between the support rod and the first ferrule, improving the clamping stability of the first ferrule while also reducing the possibility of damage to the surface of the first ferrule.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. When clamping the second ferrule, the operator places the second ferrule on the top of the support column, the support column passes through the installation slot, the support step contacts the bottom wall of the second ferrule, and the side wall of the support step fits the connecting plate. Then the press frame is placed on the main rod and contacts the second ferrule. Finally, the pressure nut is rotated to contact the second ferrule, thereby realizing the installation of the second ferrule. The operator uses the support step to contact the bottom wall of the second ferrule to ensure the horizontality of the second ferrule, and uses the side wall of the support step to fit the connecting plate to limit the position of the second ferrule, ensuring that the center of the second ferrule coincides with the axis of the main rod. Finally, the press frame is used to press the second ferrule to limit the freedom of the second ferrule. The operator uses the support rod and the press frame to clamp the first ferrule, and uses the support step and the installation slot and the pressure of the press frame to clamp the second ferrule. Compared with the simple fixture in the prior art, the three-coordinate fixture can be used for clamping the first and second ferrules, thereby improving the applicability of the three-coordinate fixture.

[0026] 2. The operator half-tightens the pressure nut and then installs the detection frame on the base, so that the detection end of the wire gauge contacts the top wall of the first ferrule. The operator rotates the lifting column to drive the detection end of the wire gauge to rotate. During the rotation process, the lifting column is raised to avoid the pressure frame. Based on the measured data, the fine-tuning component is used to fine-tune the local height of the first ferrule. After the horizontality error is within the specified range, the pressure nut is finally tightened to achieve the effect of fine-tuning the local height of the first ferrule, ensuring the detection accuracy of the first ferrule.

[0027] 3. When fine-tuning the local height of the first ferrule, the operator turns the toggle plate at the corresponding position according to the data measured by the wire gauge. Through the cooperation between the connecting block and the sliding groove and the cooperation between the toggle plate and the fine-tuning rod, the fine-tuning rod is lowered from its original state, driving the pressure block to descend, thereby achieving the effect of adjusting the height of the corresponding position of the first ferrule. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of the first ferrule and the simple clamp in the prior art.

[0029] Figure 2 It is a structural schematic diagram of the second ferrule in the prior art.

[0030] Figure 3 It is a schematic diagram of the overall structure of the three-coordinate fixture in Example 1 of the present application.

[0031] Figure 4 It is a structural diagram of the lifting frame and the locking member in Example 1 of the present application.

[0032] Figure 5 It is a structural diagram of the three-coordinate fixture in Example 2 of the present application.

[0033] Figure 6It is an exploded view used to illustrate the locking member and the pressure frame structure in Example 2 of the present application.

[0034] Figure 7 It is an exploded view used to illustrate the structure of the pressure frame and fine-tuning components in Example 2 of the present application.

[0035] Figure 8 It is an exploded diagram used to illustrate the structure of the detection component and the restriction component in Example 2 of the present application.

[0036] Figure 9 This is a diagram of the state to be detected of the three-coordinate fixture in Example 2 of the present application.

[0037] Explanation of reference numerals: 01, first ferrule; 02, second ferrule; 021, mounting groove; 022, connecting plate; 1, base; 11, main rod; 111, lifting hole; 112, avoidance notch; 12, support rod; 121, connecting sleeve; 122, support block; 123, contact arc surface; 13, pressure frame; 131, mounting notch; 132, tightening strip; 14, pressure nut; 2, lifting frame; 21, support column; 22, support step; 23, connecting part; 3. Locking part; 4. Adjustment mechanism; 41. Detection assembly; 411. Detection frame; 4111. Support frame; 4112. Rotating frame; 4113. Rotating ring; 4114. Limiting block; 412. Lifting column; 4121. Limiting groove; 413. Thread gauge; 42. Fine-tuning assembly; 421. Pressing block; 422. Toggle plate; 423. Fine-tuning rod; 424. Connecting block; 5. Limiting assembly; 51. Limiting column; 52. Toggle block; 53. Ejection spring. DETAILED DESCRIPTION

[0038] The following is combined with Figure 3-Figure 9 This application is described in further detail.

[0039] Example 1 of the present application discloses a three-coordinate fixture suitable for measuring the ferrule of a neutron part of an oil pump. Figure 3 The three-dimensional fixture for measuring the ferrule of a neutron pump part includes a base 1, a main rod 11, a support rod 12, a pressure frame 13, and a pressure nut 14. The main rod 11 is vertically fixed to the base 1, and several support rods 12 are fixed to the base 1. In this embodiment, three support rods are used as an example. The top ends of the support rods 12 are chamfered.

[0040] Reference Figure 3 and Figure 4The main rod 11 is slidably engaged with the lifting frame 2. Several connecting rods are fixedly connected to the lifting frame 2. In this embodiment, five connecting rods are used as an example. The end of each connecting rod is vertically fixedly connected to a support column 21. The top of the support column 21 is provided with a support step 22. The lifting frame 2 is provided with a locking member 3. The locking member 3 is a locking bolt. The locking member 3 passes through the lifting frame 2 and is pressed against the main rod 11. The locking member 3 is threadedly engaged with the lifting frame 2.

[0041] Reference Figure 3 The pressure frame 13 is sleeved on the main rod 11 and located above the support rod 12 , and the pressure nut 14 is threadedly engaged with the main rod 11 .

[0042] The implementation principle of a three-coordinate fixture suitable for measuring the ferrule of a neutron part of an oil pump in Example 1 of the present application is as follows: when installing the second ferrule 02, the operator lifts the lifting frame 2 until the top height of the support column 21 is higher than the top height of the support rod 12, and then rotates the locking piece 3 to limit the lifting frame 2, and then places the second ferrule 02 on the top of the five support columns 21, the support columns 21 pass through the installation grooves 021, the support steps 22 contact the bottom wall of the second ferrule 02, and the side walls of the support steps 22 fit the connecting plate 022 of the second ferrule 02, and finally the pressing frame 13 is placed on the second ferrule 02, and finally the pressure nut 14 is rotated to achieve the installation of the second ferrule 02.

[0043] The operator uses the support step 22 to contact the bottom wall of the second ferrule 02 to ensure the horizontality of the second ferrule 02, and at the same time uses the side wall of the support step 22 to fit the connecting plate 022 to limit the position of the second ferrule 02 and ensure that the center of the second ferrule 02 coincides with the axis of the main rod 11. Finally, the pressure frame 13 is used to apply pressure to the second ferrule 02 to limit the freedom of the second ferrule 02. The operator uses the cooperation of the support rod 12 and the pressure frame 13 to clamp the first ferrule 01, and uses the cooperation of the support step 22 and the mounting groove 021 and the pressure of the pressure frame 13 to clamp the second ferrule 02. Compared with the simple fixture in the prior art, the three-coordinate fixture can be used for clamping the first ferrule 01 and the second ferrule 02, thereby improving the applicability of the three-coordinate fixture.

[0044] Example 2: The difference between this example and Example 1 lies in the different structures of the locking member 3 and the pressing frame 13, and the addition of an adjustment mechanism 4.

[0045] Reference Figure 5 and Figure 6 The locking member 3 is an adjustment screw. A lifting hole 111 and a relief notch 112 are formed from top to bottom on the main rod 11. The relief notch 112 communicates with the lifting hole 111. The locking member 3 is rotatably connected to the lifting hole 111. A connecting portion 23 is fixedly connected to the lifting frame 2. The connecting portion 23 slides within the lifting hole 111 and is threadedly engaged with the locking member 3.

[0046] Reference Figure 7 The pressing frame 13 is provided with a mounting notch 131, and a tightening strip 132 is installed on both side walls of the mounting notch 131. The tightening strip 132 is a rubber strip. The pressing frame 13 is sleeved on the main rod 11 through the mounting notch 131, and the tightening strip 132 is used to tighten the main rod 11, thereby realizing the installation of the pressing frame 13.

[0047] When adjusting the height of the lifting frame 2 , the operator rotates the locking member 3 to raise the lifting frame 2 until the height of the top of the support column 21 is higher than the height of the top of the support rod 12 , thereby achieving height adjustment of the lifting frame 2 .

[0048] Reference Figure 5 、 Figure 8 and Figure 9 An adjustment mechanism 4 is provided on the base 1 and the pressure frame 13. The adjustment mechanism 4 includes a detection assembly 41 and a fine-tuning assembly 42. The detection assembly 41 includes a detection frame 411, a lifting column 412, and a wire gauge 413. The detection frame 411 includes a support frame 4111 and a rotating frame 4112. The support frame 4111 is connected to one side of the base 1 by bolts, and the rotating frame 4112 is rotatably connected to the top of the support frame 4111.

[0049] Reference Figure 8 , a limiting assembly 5 is provided on the support frame 4111, and the limiting assembly 5 includes a limiting column 51, a toggle block 52 and an ejection spring 53. A plurality of vertical holes are provided at the top of the support frame 4111, and two are taken as an example in this embodiment. A toggle groove is provided at the position corresponding to the vertical holes on the side wall of the support frame 4111, and the toggle groove is connected to the vertical hole. The limiting column 51 slides in the vertical hole, and the toggle block 52 is fixedly connected to the bottom end of the limiting column 51, and partially extends to the outside of the support frame 4111 through the toggle groove. The ejection spring 53 is provided in the toggle groove and is located between the limiting column 51 and the bottom wall of the toggle groove.

[0050] Reference Figure 5 and Figure 8 The top of the rotating frame 4112 is rotatably connected to a rotating ring 4113, and a limiting hole is provided at the bottom end of the rotating frame 4112 at the position corresponding to the limiting column 51. A limiting block 4114 is fixedly connected to the rotating ring 4113. The lifting column 412 passes through the rotating ring 4113, and a limiting groove 4121 is provided on the lifting column 412. The limiting block 4114 slides and fits in the limiting groove 4121, and a stopper is fixedly connected to the notch of the limiting groove 4121. The bottom end of the lifting column 412 is connected to a connecting frame by bolts, and the screw gauge 413 is connected to the connecting frame by bolts. During detection, the lifting column 412 is aligned with the main rod 11, and the detection end of the screw gauge 413 contacts the top wall of the first sleeve 01.

[0051] Reference Figure 5 and Figure 7The fine-tuning assembly 42 is arranged in three groups on the pressure frame 13. The fine-tuning assembly 42 includes a pressure block 421, a toggle circular plate 422, a fine-tuning rod 423, and a connecting block 424. The toggle circular plate 422 is rotatably connected to the pressure frame 13. The pressure frame 13 is provided with a fine-tuning hole, and the connecting block 424 is fixedly connected to the inner wall of the fine-tuning hole. The fine-tuning rod 423 passes through the fine-tuning hole. The fine-tuning rod 423 is provided with a sliding groove. The connecting block 424 slides in the sliding groove. The fine-tuning rod 423 is threadedly engaged with the toggle circular plate 422. The pressure frame 13 is provided with a receiving groove. The pressure block 421 slides in the receiving groove and is fixedly connected to the bottom end of the fine-tuning rod 423. The fine-tuning rod 423 is provided with an anti-loosening spring, which is located between the pressure block 421 and the bottom wall of the receiving groove.

[0052] During installation, the operator half-tightens the pressure nut 14, then makes the detection end of the wire gauge 413 touch the top wall of the first ferrule 01, and then rotates the lifting column 412. During the rotation, the lifting column 412 is raised so that the detection end of the wire gauge 413 avoids the pressure frame 13. According to the data measured by the wire gauge 413, the dial plate 422 at the corresponding position is dialed to lower the fine-tuning rod 423, and drive the pressure block 421 to lower, so as to fine-tune the height of the corresponding position of the first ferrule 01. Then, the pressure nut 14 is tightened, and then the dial block 52 is pressed to drive the limiting column 51 to descend, so that the limiting column 51 is disengaged from the limiting hole. The rotating frame 4112 can be rotated to move the wire gauge 413 away from the base 1 range, and the first ferrule 01 can be measured by the three-coordinate device.

[0053] Reference Figure 5 and Figure 6 To improve the stability of the first ferrule 01 during clamping, a connecting sleeve 121 is fixedly connected to the top of the support rod 12. A support block 122 is fixedly connected to the connecting sleeve 121. Support block 122 is provided with a contact arc surface 123. When the first ferrule 01 is clamped, the contact arc surface 123 conforms to the arc wall of the first clamping platform. The contact arc surface 123 increases the contact area between the support rod 12 and the first ferrule 01.

[0054] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A three-coordinate fixture suitable for measuring the ferrule of a neutron part of an oil pump, comprising a base (1), a main rod (11), a support rod (12), a pressure frame (13) and a pressure nut (14), characterized in that: The main rod (11) is provided with a lifting frame (2) and a locking member (3) for limiting the movement of the lifting frame (2); the lifting frame (2) is connected with a plurality of support columns (21); the support columns (21) correspond to the mounting grooves (021) on the second clamping sleeve (02) one by one; the top of the support column (21) is provided with a support step (22); when installed, the height of the top of the support column (21) is higher than the height of the top of the support rod (12); the support column (21) passes through the mounting groove (021) of the second clamping sleeve (02); the side of the support step (22) is The wall of the connecting plate (022) is in contact with the second ferrule (02); the pressing frame (13) is arranged on the second ferrule (02); the pressure nut (14) is threadedly engaged with the main rod (11) and contacts the pressing frame (13); the locking member (3) is an adjusting screw; a lifting hole (111) and an avoidance notch (112) are provided on the main rod (11); the avoidance notch (112) is communicated with the inside of the lifting hole (111); the locking member (3) is rotatably connected in the lifting hole (111); and a connecting portion (23) is connected to the lifting frame (2). The connecting portion (23) is slidably fitted in the lifting hole (111) and is threadedly fitted with the locking member (3); an adjustment mechanism (4) is provided between the base (1) and the pressing frame (13); the adjustment mechanism (4) comprises a detection component (41) and a fine adjustment component (42) for fine-tuning the local height of the second ferrule (02); the detection component (41) comprises a detection frame (411), a lifting column (412) and a thread gauge (413); the detection frame (411) is detachably connected to one side of the base (1); the top of the detection frame (411) A rotating ring (4113) is rotatably connected, the lifting column (412) passes through the rotating ring (4113), a limiting groove (4121) is opened on the lifting column (412), a limiting block (4114) is connected to the rotating ring (4113), the limiting block (4114) is slidably fitted in the limiting groove (4121), the wire gauge (413) is connected to the bottom end of the lifting column (412), during detection, the lifting column (412) is aligned with the main rod (11), and the detection end of the wire gauge (413) contacts the top wall of the second ferrule (02);The fine-tuning assembly (42) comprises a pressing block (421), a toggle circular plate (422), a fine-tuning rod (423) and a connecting block (424); the toggle circular plate (422) is rotatably connected to the pressing frame (13); a fine-tuning hole is provided on the pressing frame (13); the connecting block (424) is connected to the hole wall of the fine-tuning hole; the fine-tuning rod (423) is inserted into the fine-tuning hole; a sliding groove is provided on the fine-tuning rod (423); the connecting block (424) is slidably matched with the sliding groove; the pressing block (421) is slidably matched on the pressing frame (13) and is connected to the bottom end of the fine-tuning rod (423); when the local position of the second ferrule (02) is fine-tuned, the pressing block (421) contacts the top wall of the second ferrule (02). ; 2. The three-coordinate fixture for measuring the ferrule of the neutron parts of the oil pump according to claim 1 is characterized in that: The locking member (3) is a locking bolt, the lifting frame (2) is vertically slidably fitted on the main rod (11), the locking member (3) passes through the lifting frame (2) and is pressed against the main rod (11), and the locking member (3) is threadedly fitted with the lifting frame (2).

3. The three-coordinate fixture suitable for measuring the ferrule of the neutron parts of the oil pump according to claim 1 is characterized in that: The detection frame (411) comprises a support frame (4111) and a rotating frame (4112); the support frame (4111) is detachably connected to one side of the base (1); the rotating frame (4112) is rotatably connected to the top of the support frame (4111); the lifting column (412) is arranged on the rotating frame (4112); and a limiting component (5) for limiting the angle of the rotating frame (4112) is arranged on the support frame (4111).

4. The three-coordinate fixture for measuring the ferrule of the neutron parts of the oil pump according to claim 3 is characterized in that: The limiting assembly (5) comprises a limiting column (51), a toggle block (52) and an ejection spring (53). A plurality of vertical holes are formed at the top of the support frame (4111). The limiting column (51) is slidably fitted in the vertical holes. The toggle block (52) is connected to the bottom end of the limiting column (51). Part of the toggle block (52) is located outside the vertical hole. The ejection spring (53) is arranged in the vertical hole and is located between the limiting column (51) and the bottom end of the vertical hole. A limiting hole is formed at the bottom end of the rotating frame (4112) at a position corresponding to the limiting column (51). When the limiting column (51) is inserted into the limiting hole, the lifting column (412) is aligned with the main rod (11).

5. The three-coordinate fixture suitable for measuring the ferrule of the neutron parts of the oil pump according to claim 1 is characterized in that: The top end of the support rod (12) is connected to a connecting sleeve (121), the connecting sleeve (121) is connected to a supporting block (122), and the supporting block (122) is provided with a resisting arc surface (123). When supporting the first ferrule (01), the resisting arc surface (123) fits the arc wall of the first ferrule (01).

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