Coaxiality and perpendicularity testing fixture for stepped hole type workpiece

Abstract

The utility model relates to a coaxiality and verticality testing fixture for a stepped hole type workpiece. The lower end of a positioning shaft is provided with an insertion end which is used for being inserted into a lower hole body of the workpiece to be tested; the upper half section of the positioning shaft is sleeved with a rotating base, and the rotating base can rotate around the positioning shaft; the first dial indicator is installed on the rotating base through a supporting plate, and a measuring rod of the first dial indicator extends downwards and is used for abutting against the top face A of a measured workpiece. A lever seat is integrally formed on the peripheral surface of the rotating base; a vertical lever is mounted in an inner cavity of the lever seat through a rotating shaft; a gauge stand is installed on the lever seat, a second dial gauge is horizontally installed on the gauge stand, and a measuring rod of the second dial gauge horizontally extends rightwards and abuts against the left side face of the lever. The lower end of the lever extends to extend into an upper hole body of a detected workpiece, and a contact is mounted on the left side surface of the lower end of the lever and is used for being in contact with the inner wall of the upper hole body; a measuring rod of the second dial indicator is sleeved with a spring, and the spring is always in a compressed state.

Description

Technical Field

[0001] The utility model relates to the technical field of coaxiality and verticality inspection tools, in particular to a coaxiality and verticality inspection tool for step hole workpieces. Background Art

[0002] like Figure 1 The figure shows a schematic diagram of the structure of the workpiece to be measured, wherein the workpiece to be measured 9 has a stepped hole. Specifically, the stepped hole of the workpiece to be measured 9 includes an upper hole body 9a, a middle hole body 9b and a lower hole body 9c from top to bottom; the diameter of the upper hole body 9a is larger than the diameter of the middle hole body 9b, and the diameter of the middle hole body 9b is larger than the diameter of the lower hole body 9c. When the workpiece to be measured 9 is in use, the upper hole body 9a and the lower hole body 9c are mounting holes, and the two have coaxiality requirements, and the axes of the upper hole body 9a and the lower hole body 9c have verticality requirements with the top surface A of the workpiece to be measured 9.

[0003] For the above-mentioned workpiece 9, if the traditional meter is used for measurement, the coaxiality and verticality need to be measured separately, and cannot be detected at the same time, resulting in low detection efficiency and failure to meet the requirements of rapid detection. Utility Model Content

[0004] The main purpose of the utility model is to provide a coaxiality and verticality inspection tool for stepped hole workpieces, which can simultaneously inspect the coaxiality and verticality of the workpiece to be inspected, so as to improve the inspection efficiency.

[0005] To achieve the above-mentioned purpose, the utility model proposes a coaxiality and verticality inspection tool for stepped hole workpieces, comprising a positioning shaft, a first dial indicator and a second dial indicator; the lower end of the positioning shaft is arranged as a plug-in end for being inserted into the lower hole body of the measured workpiece; a rotating base is sleeved on the upper half of the positioning shaft, and the rotating base can rotate around the positioning shaft; a horizontal support plate is integrally formed on the outer peripheral surface of the rotating base, the first dial indicator is vertically mounted on the support plate, and the measuring rod of the first dial indicator extends downward and is used to abut against the top surface A of the measured workpiece; a Lever seat; and a vertical lever is installed in the inner cavity of the lever seat through a rotating shaft; a meter frame is installed on the lever seat, the second dial indicator is horizontally installed on the meter frame, and the measuring rod of the second dial indicator extends horizontally to the right and abuts on the left side of the lever; the lower end of the lever extends to extend into the upper hole body of the workpiece to be measured, and a contact is installed on the left side of the lower end of the lever for contacting the inner wall of the upper hole body; a spring is sleeved on the measuring rod of the second dial indicator, the left end of the spring abuts on the meter frame, and the right end of the spring abuts on the left side of the lever, and the spring is always in a compressed state.

[0006] Preferably, a support plate is integrally formed at the lower end of the rotating base, and the diameter of the support plate is larger than the diameter of the upper hole body of the workpiece to be measured.

[0007] Preferably, a vertical socket is provided on the support plate, a horizontal threaded hole is provided on the end face of the support plate, the threaded hole is connected to the socket, and a knurled screw is screwed on the threaded hole; the first dial indicator is inserted into the socket and tightened by the knurled screw.

[0008] Preferably, the meter stand comprises a meter stand body and a meter clamping sleeve, and the meter stand body and the meter clamping sleeve are connected via a second knurled screw; and the second dial indicator is horizontally installed between the meter stand body and the meter clamping sleeve.

[0009] Preferably, a first mounting edge is provided on the watch frame body, and a second mounting edge is provided on the lever seat; the first mounting edge and the second mounting edge are butted against each other and connected by screws.

[0010] Preferably, a bushing is provided between the inner hole wall of the rotating base and the outer cylindrical surface of the positioning shaft.

[0011] Preferably, a handle is provided on the outer peripheral surface of the rotating base.

[0012] Preferably, there are two handles, which are symmetrically arranged at 180 degrees on the outer peripheral surface of the rotating base.

[0013] Preferably, the vertical height from the center of the contact to the center of the rotating shaft is h2, and the vertical height from the center of the rotating shaft to the center of the measuring rod of the second dial indicator is h1, and the two satisfy: h1=h2.

[0014] Preferably, the lower end of the positioning shaft and the lower hole body of the workpiece to be measured are in transition fit.

[0015] Due to the adoption of the above technical solution, the beneficial effects of the utility model are as follows:

[0016] By adopting the inspection tool provided by the utility model, when in use, the lower end of the positioning shaft is inserted into the lower hole body of the workpiece to be measured, at this time the positioning shaft is coaxial with the lower hole body of the workpiece to be measured, the rotating base is sleeved on the positioning shaft, and when the rotating base is rotated, the verticality of the lower hole body of the workpiece to be measured and the top surface A of the workpiece to be measured can be detected by using the first dial indicator, and the coaxiality of the upper hole body of the workpiece to be measured can be detected by using the second dial indicator and the lever. Therefore, by using the inspection tool provided by the utility model, one detection can detect the coaxiality of the upper hole body and the lower hole body of the workpiece to be measured, and can also detect the verticality of the upper hole body, the lower hole body and the end surface A at the same time, which greatly improves the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of the workpiece being measured;

[0019] Figure 2 A schematic diagram of the inspection tool provided by the utility model when it cooperates with the workpiece to be inspected;

[0020] Figure 3 for Figure 2 Enlarged view of point M in the middle.

[0021] Explanation of the accompanying reference numerals: 1. screw; 2. positioning shaft; 3. first dial indicator; 4. first knurled screw; 5. support plate; 5a. socket; 5b. threaded hole; 6. handle; 7. rotating shaft; 8. meter stand; 9. measured workpiece; 9a. upper hole body; 9b. middle hole body; 9c. lower hole body; 10. lever; 11. meter stand body; 11a. first mounting edge; 12. contact; 13. spring; 14. second knurled screw; 15. meter clamp; 16. rotating base; 17. second dial indicator; 18. lever seat; 18a. second mounting edge; 19. bushing. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0025] Combination Figure 2 , Figure 3 As shown, a coaxiality and verticality inspection tool for stepped hole workpieces includes a positioning shaft 2, a first dial indicator 3 and a second dial indicator 17; the lower end of the positioning shaft 2 is set as a plug-in end for being inserted into the lower hole body 9c of the workpiece 9 to be measured; a rotating base 16 is sleeved on the upper half of the positioning shaft 2, and the rotating base 16 can rotate around the positioning shaft 2; a horizontal support plate 5 is integrally formed on the outer peripheral surface of the rotating base 16, and the first dial indicator 3 is vertically installed on the support plate 5, and the measuring rod of the first dial indicator 3 extends downward and is used to abut against the top surface A of the workpiece 9 to be measured; a lever seat 18 is also integrally formed on the outer peripheral surface of the rotating base 16; and a lever seat 18 is formed inside the lever seat 18 A vertical lever 10 is installed in the cavity through a rotating shaft 7; a meter frame 8 is installed on the lever seat 18, and the second dial indicator 17 is horizontally installed on the meter frame 8, and the measuring rod of the second dial indicator 17 extends horizontally to the right and abuts on the left side of the lever 10; the lower end of the lever 10 is extended to extend into the upper hole body 9a of the workpiece 9 to be measured, and a contact 12 is installed on the left side of the lower end of the lever 10 for contacting the inner wall of the upper hole body 9a; a spring 13 is sleeved on the measuring rod of the second dial indicator 17, the left end of the spring 13 abuts on the meter frame 8, and the right end of the spring 13 abuts on the left side of the lever 10, and the spring 13 is always in a compressed state.

[0026] During the inspection, first, the lower end of the positioning shaft 2 is inserted into the lower hole 9c of the workpiece 9 to be measured. At this time, the positioning shaft 2 is coaxial with the lower hole 9c of the workpiece 9 to be measured, and the rotating base sleeve 16 is set on the positioning shaft 2. The position of the first dial gauge 3 in the vertical direction is adjusted so that the measuring rod of the first dial gauge 3 is against the top surface A of the workpiece 9 to be measured. In addition, the lower end of the lever 10 extends into the upper hole 9a of the workpiece 9 to be measured, and the spring 13 always forms an inward elastic force on the upper end of the lever 10, so that the contact 12 at the lower end of the lever 10 always abuts against the inner wall of the upper hole 9a of the workpiece 9 to be measured. By rotating the rotating base 16, the various components on the rotating base 16 are driven to rotate together, and the first dial indicator 3 can be used to detect the verticality of the positioning shaft 2 and the top surface A of the workpiece 9 to be measured, and then indirectly obtain the verticality of the lower hole body 9c of the workpiece 9 to be measured and the top surface A of the workpiece 9 to be measured; in addition, by using the second dial indicator 17 and the lever 10, the coaxiality of the positioning shaft 2 and the upper hole body 9a of the workpiece 9 to be measured can be detected, and then indirectly obtain the coaxiality of the upper hole body 9a and the lower hole body 9c of the workpiece 9 to be measured.

[0027] Combination Figure 2 As shown, a support plate 16b is integrally formed at the lower end of the rotating base 16, and the diameter of the support plate 16b is larger than the diameter of the upper hole 9a of the workpiece 9 to be measured. During the inspection, the support plate 16b is used to abut against the top surface A of the workpiece 9 to support the rotating base 16.

[0028] Combination Figure 2 As shown, a vertical insertion hole 5a is provided on the support plate 5, and a horizontal threaded hole 5b is provided on the end surface of the support plate 5. The threaded hole 5b is connected to the insertion hole 5a, and a knurled screw 4 is screwed on the threaded hole 5b; the first dial gauge 3 is inserted into the insertion hole 5a and tightened by the knurled screw 4. The insertion hole 5a is used for movably inserting the first dial gauge 3, so as to facilitate the adjustment of the vertical height of the first dial gauge 3. When the position of the first dial gauge 3 is adjusted to the right position, the first dial gauge 3 can be tightened by tightening the knurled screw 4.

[0029] Combination Figure 2 and Figure 3 As shown, the meter frame 8 includes a meter frame body 11 and a meter clamping sleeve 15, and the meter frame body 11 and the meter clamping sleeve 15 are connected by a second knurled screw 14; the second dial gauge 17 is horizontally installed between the meter frame body 11 and the meter clamping sleeve 15. When the second dial gauge 17 is clamped, the second knurled screw 14 is first loosened, and the radial position of the second dial gauge 17 is adjusted so that the measuring rod of the second dial gauge 17 is against the left side of the upper end of the lever 10, and then the second knurled screw 14 is tightened to drive the meter clamping sleeve 15 to move upward to clamp the second dial gauge 17, and the installation of the second dial gauge 17 is completed.

[0030] Combination Figure 3 As shown, a first mounting edge 11a is provided on the meter frame body 11, and a second mounting edge 18a is provided on the lever seat 18; the first mounting edge 11a and the second mounting edge 18a are butted against each other and connected by screws 1. The meter frame body 11 and the lever seat 18 are screwed together by the mounting edges, which is convenient for disassembly.

[0031] Combination Figure 2 As shown, a bushing 19 is provided between the inner hole wall of the rotating base 16 and the outer cylindrical surface of the positioning shaft 2 . The bushing 19 is provided to prevent the rotating base 16 from being worn.

[0032] Combination Figure 2 As shown, a handle 6 is provided on the outer circumference of the rotating base 16. During the inspection, the operator can hold the handle 6 to rotate the rotating base 16. Furthermore, there are two handles 6, which are symmetrically arranged at 180 degrees on the outer circumference of the rotating base 16.

[0033] Combination Figure 3 As shown, the vertical height between the center of the contact 12 and the center of the rotating shaft 7 is h2, and the vertical height between the center of the rotating shaft 7 and the center of the measuring rod of the second dial gauge 17 is h1, and the two satisfy: h1 = h2. The coaxiality error between the upper hole 9a of the measured workpiece 9 and the positioning shaft 2 is transmitted to the dial gauge 17 through the measuring rod 10 at a ratio of 1:1.

[0034] In order to ensure the positioning accuracy of the positioning shaft 2, in this embodiment, it is required that the lower end of the positioning shaft 2 and the lower hole body 9c of the workpiece 9 to be measured are in transition fit.

[0035] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made under the concept of the present invention using the contents of the specification and drawings of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A coaxiality and verticality inspection tool for stepped hole workpieces, characterized by: The invention comprises a positioning shaft (2), a first dial indicator (3) and a second dial indicator (17); the lower end of the positioning shaft (2) is arranged as a plug-in end for being plugged into a lower hole (9c) of a workpiece (9) to be measured; a rotating base (16) is sleeved on the upper half of the positioning shaft (2), and the rotating base (16) can rotate around the positioning shaft (2); A horizontal support plate (5) is integrally formed on the outer peripheral surface of the rotating base (16), the first dial gauge (3) is vertically mounted on the support plate (5), and the measuring rod of the first dial gauge (3) extends downward and is used to abut against the top surface A of the workpiece (9) to be measured; A lever seat (18) is integrally formed on the outer peripheral surface of the rotating base (16); a vertical lever (10) is installed in the inner cavity of the lever seat (18) via a rotating shaft (7); a meter frame (8) is installed on the lever seat (18), the second dial gauge (17) is horizontally installed on the meter frame (8), and the measuring rod of the second dial gauge (17) extends horizontally to the right and abuts against the left side of the lever (10); the lower end of the lever (10) extends to extend into the upper hole (9a) of the workpiece (9) to be measured, and a contact (12) is installed on the left side of the lower end of the lever (10) for contacting the inner wall of the upper hole (9a); A spring (13) is sleeved on the measuring rod of the second dial gauge (17), the left end of the spring (13) abuts against the gauge frame (8), the right end of the spring (13) abuts against the left side of the lever (10), and the spring (13) is always in a compressed state.

2. A coaxiality and verticality inspection tool for stepped hole workpieces as claimed in claim 1, characterized in that: A support plate (16b) is integrally formed at the lower end of the rotating base (16), and the diameter of the support plate (16b) is larger than the diameter of the upper hole (9a) of the workpiece (9) to be measured.

3. A coaxiality and verticality inspection tool for step hole workpieces as claimed in claim 1, characterized in that: A vertical insertion hole (5a) is provided on the support plate (5), a horizontal threaded hole (5b) is provided on the end surface of the support plate (5), the threaded hole (5b) is connected to the insertion hole (5a), and a knurled screw (4) is screwed on the threaded hole (5b); the first dial indicator (3) is inserted into the insertion hole (5a) and tightened by the knurled screw (4).

4. A coaxiality and verticality inspection tool for stepped hole workpieces as claimed in claim 1, characterized in that: The meter frame (8) comprises a meter frame body (11) and a meter clamping sleeve (15); the meter frame body (11) and the meter clamping sleeve (15) are connected via a second knurled screw (14); and the second dial indicator (17) is horizontally installed between the meter frame body (11) and the meter clamping sleeve (15).

5. A coaxiality and verticality inspection tool for stepped hole workpieces as claimed in claim 4, characterized in that: A first mounting edge (11a) is provided on the watch frame body (11), and a second mounting edge (18a) is provided on the lever seat (18); the first mounting edge (11a) and the second mounting edge (18a) are butted against each other and connected via screws (1).

6. A coaxiality and verticality inspection tool for step hole workpieces as claimed in claim 1, characterized in that: A bushing (19) is arranged between the inner hole wall of the rotating base (16) and the outer cylindrical surface of the positioning shaft (2).

7. A coaxiality and verticality inspection tool for step hole workpieces as claimed in claim 1, characterized in that: A handle (6) is provided on the outer peripheral surface of the rotating base (16).

8. A coaxiality and verticality inspection tool for step hole workpieces as claimed in claim 7, characterized in that: The number of the handles (6) is two, and they are respectively located on the outer peripheral surface of the rotating base (16) in a 180-degree symmetric manner.

9. A coaxiality and verticality inspection tool for step hole workpieces as claimed in claim 1, characterized in that: The vertical height between the center of the contact (12) and the center of the rotating shaft (7) is h2, and the vertical height between the center of the rotating shaft (7) and the center of the measuring rod of the second dial indicator (17) is h1, and the two satisfy: h1=h2.

10. The coaxiality and verticality inspection tool for step hole workpieces according to claim 1, characterized in that: The lower end of the positioning shaft (2) and the lower hole body (9c) of the workpiece (9) to be measured are in transition fit.

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