Suction head concentricity detection tool

Abstract

The invention provides a suction head concentricity detection tool which comprises a base installed in 2.5-dimensional measuring equipment, a shaft hole is formed in the base in the front-back direction, a core rod rotating shaft is installed in the shaft hole through a bearing, the rear end of the core rod rotating shaft penetrates out of the base and then is connected with a rotating handle, and a suction head inserting part is arranged at the front end of the core rod rotating shaft. A guide seat is connected to the front end of the base, a center hole is formed in the guide seat, an observation hole is formed in the side face of the guide seat in the length direction and is communicated with the center hole, a suction head mounting sleeve is inserted into the center hole from the front in a guiding mode, and a suction head is inserted into the rear end of the suction head mounting sleeve in a positioning mode; the suction head installation sleeve enables the suction head to be sleeved into the front end of the mandrel rotating shaft in a positioning and installing mode and then retreats, a poking piece is arranged at the top of the rear end of the guide seat, a U-shaped groove matched with the rear end face of the suction head is formed in the bottom of the poking piece, and the poking piece is poked to push the suction head out of the mandrel rotating shaft to fall off. According to the invention, the concentricity of the suction head can be accurately and rapidly detected.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mechanical tooling, in particular to a suction head concentricity detection tooling. BACKGROUND

[0002] The suction head is a key accessory of a laboratory pipette or a vacuum cleaner, which is used for accurately sucking liquid or cleaning the surface. The traditional suction head concentricity detection adopts a 2.5-dimensional measuring device to determine the concentricity by measuring the center deviation of the small end and the large end. This method has the problems of inconsistent detection environment and actual use scene, low detection efficiency and poor consistency. SUMMARY

[0003] In view of the above problems, the present application aims to provide a suction head concentricity detection tooling which can accurately and quickly detect the concentricity of the suction head.

[0004] The technical scheme of the present application is a suction head concentricity detection tooling, characterized in that: a base is installed in a 2.5-dimensional measuring device, the base is provided with an axle hole in the front-rear direction, a core rod shaft is installed in the axle hole through a bearing, a rotating handle is connected to the rear end of the core rod shaft which penetrates out of the base, a suction head plug-in part is arranged at the front end of the core rod shaft, a guide seat is connected to the front end of the base, the guide seat is provided with a center hole, an observation hole is arranged on the side of the guide seat along the length direction, the observation hole and the center hole are through, a suction head mounting sleeve is inserted into the center hole from the front, and a suction head is positioned and inserted into the rear end of the suction head mounting sleeve.

[0005] Preferably, a mounting port is vertically arranged on the top of the guide seat, the push piece is located in the mounting port, the left and right sides of the upper region of the push piece are hinged to the guide seat, the U-shaped groove at the lower end of the push piece is inserted into the outside of the core rod shaft and corresponds to the rear end surface of the suction head, and the push piece is pressed at the top to push the suction head out of the core rod shaft through the lever action.

[0006] Preferably, the inner hole of the rear end of the suction head mounting sleeve is a stepped hole, and the rear end of the suction head is a stepped surface, the suction head is inserted into the suction head mounting sleeve to realize axial and radial positioning through the cooperation of the stepped surface and the stepped hole.

[0007] Preferably, the suction head insertion part comprises a first positioning surface, a second positioning surface and a stop boss arranged from front to back, the first positioning surface is inclinedly connected with the front end surface of the mandrel shaft, the second positioning surface has an outer diameter larger than that of the first positioning surface, the second positioning surface and the first positioning surface are inclinedly connected, the stop boss has an outer diameter larger than that of the second positioning surface, the rear end region of the inner hole of the suction head is a stepped hole, the two stepped surfaces of the stepped hole are matched with the first positioning surface and the second positioning surface respectively, and the rear end surface of the suction head is in contact with the stop boss for positioning.

[0008] The present application can simulate the actual use environment, is simple to operate, and can more truly, efficiently and consistently detect the concentricity of the suction head. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 Fig. 1 is a structural schematic diagram of the present application; Figure 2 Fig. 2 is a top view of the present application; Figure 3 Fig. 3 is a sectional view along the direction of A-A; Figure 2 Fig. 3 is a sectional view along the direction of A-A; Figure 4 Fig. 4 is a sectional view along the direction of B-B; Figure 3 Fig. 4 is a sectional view along the direction of B-B; Figure 5 Fig. 5 is a structural schematic diagram of the present application after the suction head mounting sleeve and the suction head are taken out; Figure 6 Fig. 6 is a structural schematic diagram of the mandrel shaft, the suction head and the push piece in the present application; 1 - base; 2 - mandrel shaft; 21 - suction head insertion part; 211 - first positioning surface; 212 - second positioning surface; 213 - stop boss; 3 - rotating handle; 4 - guide seat; 41 - center hole; 42 - observation hole; 5 - suction head mounting sleeve; 6 - suction head; 7 - push piece; 71 - U-shaped groove. DETAILED DESCRIPTION

[0010] The present application will be further described in detail below with reference to the drawings.

[0011] As Figures 1 to 6As shown, the present invention provides a fixture for detecting the concentricity of suction heads, characterized in that: it includes a base 1 installed in a 2.5D measuring device, the base 1 having a shaft hole along its front-to-back direction, a mandrel shaft 2 mounted in the shaft hole via a bearing, the rear end of the mandrel shaft 2 extending out of the base 1 and connected to a rotating handle 3, the front end of the mandrel shaft 2 having a suction head insertion part 21, the front end of the base 1 being connected to a guide seat 4, the guide seat 4 having a center hole 41, and the side of the guide seat 4 extending along its length... An observation hole 42 is provided in the direction of the observation hole 42, which is connected to the center hole 41. A suction head mounting sleeve 5 is inserted into the center hole 41 from the front. A suction head 6 is positioned and inserted at the rear end of the suction head mounting sleeve 5. After the suction head mounting sleeve 5 guides the suction head 6 into the front end of the mandrel shaft 2 for positioning and installation, it is removed. A lever 7 is provided at the top of the rear end of the guide seat 4. A U-shaped groove 71 matching the rear end face of the suction head 6 is provided at the bottom of the lever 7. By moving the lever 7, the suction head 6 is pushed out of the mandrel shaft 2 and detached.

[0012] In the above scheme, the top of the guide seat 4 has a vertically opened mounting port, the paddle 7 is located in the mounting port, the left and right sides of the upper area of ​​the paddle 7 are hinged to the guide seat 4, the U-shaped groove 71 at the lower end of the paddle 7 is inserted into the outside of the core rod shaft 2 and corresponds to the rear end face of the suction head 6. Pressing the top of the paddle 7 causes the bottom of the paddle 7 to push the suction head 6 out of the core rod shaft 2 through the lever action.

[0013] Furthermore, the inner hole at the rear end of the suction head mounting sleeve 5 is a stepped hole, and the rear end of the suction head 6 is a stepped surface. The suction head 6 is inserted into the suction head mounting sleeve 5 and is positioned axially and radially through the cooperation of the stepped surface and the stepped hole.

[0014] Specifically, the suction head insertion part 21 includes a first positioning surface 211, a second positioning surface 212, and a stop boss 213 arranged from front to back. The first positioning surface 211 is inclined to the front end face of the mandrel shaft 2. The outer diameter of the second positioning surface 212 is larger than the outer diameter of the first positioning surface 211. The second positioning surface 212 and the first positioning surface 211 are inclined to each other. The outer diameter of the stop boss 213 is larger than the outer diameter of the second positioning surface 212. The rear end area of ​​the inner hole of the suction head 6 is a stepped hole. The two stepped surfaces on the stepped hole are respectively matched with the first positioning surface 211 and the second positioning surface 212. The rear end face of the suction head 6 is positioned by contact with the stop boss 213.

[0015] The process of using this invention is as follows: Insert the suction head 6 into the inner hole at the rear end of the suction head mounting sleeve 5. The axial and radial positioning of the suction head 6 is achieved through the fit between the stepped surface and the stepped hole. Guide the suction head mounting sleeve 5 along the center hole 41 of the guide seat 4. The stepped surface of the inner hole at the rear end of the suction head 6 is sequentially inserted into the first positioning surface 211 and the second positioning surface 212 of the suction head insertion part 21, finally being limited by the stop boss 213. At this point, the suction head 6 and the suction head insertion part 21 are tightly fitted, achieving complete positioning and installation. Since the suction head 6 and the suction head mounting sleeve 5 are only unidirectionally limited in the axial direction, the suction head mounting sleeve 5 can be freely pulled forward. Turn on the 2.5D measuring device, rotate the rotating handle 3 one revolution, measure and record the maximum deviation distance of the outer surface of the suction head relative to the ideal axis of rotation during the rotation. This maximum deviation distance is the concentricity error value of the suction head. After the test is completed, move the lever 7 to push the suction head 6 out of the mandrel shaft 2, remove the suction head 6, and proceed to test the next suction head 6.

[0016] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A suction head concentricity detection tool, characterized by: The application relates to a chip mounter comprising a base (1) installed in a 2.5-dimensional measuring device, an axle hole is formed in the base (1) along the front-rear direction, a core rod rotating shaft (2) is installed in the axle hole through a bearing, a rotating handle (3) is connected to the rear end of the core rod rotating shaft (2) after penetrating through the base (1), a suction head inserting part (21) is arranged at the front end of the core rod rotating shaft (2), a guide base (4) is connected to the front end of the base (1), a central hole (41) is formed in the guide base (4), an observation hole (42) is formed in the side of the guide base (4) along the length direction, the observation hole (42) and the central hole (41) are through-penetrating, a suction head mounting sleeve (5) is inserted into the central hole (41) from the front, and a suction head (6) is positioned and inserted into the rear end of the suction head mounting sleeve (5); the suction head mounting sleeve (5) is withdrawn after positioning and mounting the suction head (6) into the front end of the core rod rotating shaft (2) in a guided mode, a push piece (7) is arranged at the top of the rear end of the guide base (4), a U-shaped groove (71) matched with the rear end surface of the suction head (6) is formed in the bottom of the push piece (7), and the push piece (7) pushes the suction head (6) off the core rod rotating shaft (2) by being pushed.

2. The concentricity detection tool for a suction head according to claim 1, characterized in that: A mounting hole is vertically formed in the top of the guide base (4), the push piece (7) is located in the mounting hole, the left and right sides of the upper region of the push piece (7) are hinged to the guide base (4), the U-shaped groove (71) of the lower end of the push piece (7) is inserted into the outside of the core rod rotating shaft (2) and corresponds to the rear end surface of the suction head (6), and the push piece (7) pushes the suction head (6) off the core rod rotating shaft (2) by being pressed at the top.

3. The concentricity detection tool for a suction head according to claim 1, characterized in that: The inner hole of the rear end of the suction head mounting sleeve (5) is a stepped hole, the rear end of the suction head (6) is a stepped surface, and the suction head (6) is inserted into the suction head mounting sleeve (5) and positioned in the axial and radial directions through the cooperation of the stepped surface and the stepped hole.

4. The concentricity detection tool for a suction head according to claim 3, characterized in that: The suction head inserting part (21) comprises a first positioning surface (211), a second positioning surface (212) and a stop boss (213) arranged from front to back, the first positioning surface (211) is inclinedly connected to the front end surface of the core rod rotating shaft (2), the outer diameter of the second positioning surface (212) is larger than that of the first positioning surface (211), the second positioning surface (212) and the first positioning surface (211) are inclinedly connected, the outer diameter of the stop boss (213) is larger than that of the second positioning surface (212), the rear end region of the inner hole of the suction head (6) is a stepped hole, two stepped surfaces of the stepped hole are matched with the first positioning surface (211) and the second positioning surface (212) respectively, and the rear end surface of the suction head (6) is positioned through the stop boss (213).

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