Single-reference intermediate shaft keyway symmetry degree measuring gauge

Abstract

The utility model provides a single-reference intermediate shaft keyway symmetry degree measuring gauge, and mainly solves the technical problems of long time consumption and low measuring efficiency in the prior art. The measuring gauge comprises a fixing assembly, a measuring assembly and a supporting piece. The fixing assembly comprises a base, a stand column, a first fixing piece and a second fixing piece. The measuring assembly comprises a measuring block, a measuring meter and a measuring meter frame; the measuring block is horizontally mounted in the measuring channel through a first fixing piece, and two ends of the measuring block extend out of the measuring channel; the second fixing piece is sleeved at one end of the measuring meter frame and is mounted in the mounting groove; the other end of the measuring meter frame extends out of the measuring channel and is used for installing a measuring meter, and the measuring end of the measuring meter faces downwards. During measurement, the measuring end of the measuring meter is in contact with the upper surface of one end of the measuring block, and the other end of the measuring block is used for extending into a key groove of a to-be-measured intermediate shaft for measurement. The supporting member is used for supporting a to-be-tested intermediate shaft.

Description

Technical Field

[0001] The utility model relates to a detection tool, in particular to a single-reference intermediate shaft keyway symmetry measurement tool. Background Art

[0002] The single reference intermediate shaft is the intermediate shaft part of the gearbox assembly. Generally, the symmetry accuracy of the intermediate shaft keyway directly affects the press-fitting accuracy of the intermediate shaft gear, which in turn affects the smooth shifting of the gearbox. Therefore, if the symmetry accuracy of the intermediate shaft keyway is seriously out of tolerance, it will directly cause the gearbox to disengage.

[0003] The symmetry of the single-reference intermediate shaft keyway is a single-reference symmetry. This symmetry has no symmetrical relationship with the shaft teeth, and the intermediate shaft also has no arc keyway structure. The reference of the symmetry marked on the product drawing is the top hole at the end of the intermediate shaft, that is, the reference is the intermediate shaft body itself.

[0004] At present, for the single-reference intermediate shaft keyway, whether it is the keyway milling process before heat treatment or the keyway grinding process after heat treatment, three-coordinate measurement is required. Traditional three-coordinate measurement requires parts to queue up for measurement in a professional precision measurement room, which is time-consuming, has low measurement efficiency, and cannot achieve rapid on-site measurement.

[0005] The Chinese patent with publication number CN105043223A discloses a single-key symmetry gauge and measurement method for gears. Although it can measure the single-key symmetry, it is only for the single key of the gear and is not applicable to the keyway of the intermediate shaft. Therefore, it is urgent to develop a gauge that can quickly measure the symmetry of the keyway of the single-reference intermediate shaft. Utility Model Content

[0006] The utility model aims to provide a single-reference intermediate shaft keyway symmetry measuring fixture, which mainly solves the technical problems of long time consumption and low measuring efficiency in the prior art.

[0007] To achieve the above purpose, the technical solution of the utility model is as follows:

[0008] A single-reference intermediate shaft keyway symmetry measuring fixture, which is special in that it includes a fixing component, a measuring component and a supporting component;

[0009] The fixing assembly includes a base, a column, a first fixing member and a second fixing member; the column is a U-shaped structure, and its U-shaped bottom is installed on the base; the hollow part of the U-shaped structure is a measuring channel, and two side walls of the measuring channel are respectively provided with mounting grooves;

[0010] The measuring assembly includes a measuring block, a measuring meter and a measuring meter stand; the measuring block is a long strip structure, and its width is adapted to the width of the measuring channel; the first fixing piece is sleeved on the measuring block and installed in the installation groove; the measuring block is horizontally installed in the measuring channel through the first fixing piece, and both ends extend out of the measuring channel;

[0011] The measuring meter frame is located above the measuring block and parallel to the measuring block, the width of the measuring meter frame is adapted to the width of the measuring channel, the second fixing member is sleeved on one end of the measuring meter frame and installed in the installation groove; the other end of the measuring meter frame extends out of the measuring channel for installing the measuring meter, the measuring end of the measuring meter faces downward and contacts the upper surface of one end of the measuring block, the other end of the measuring block is used to extend into the keyway of the intermediate shaft to be measured for measurement; the thickness of the measuring block is adapted to the slot width of the keyway of the intermediate shaft to be measured; the supporting member is used to support the intermediate shaft to be measured.

[0012] Furthermore, it also includes a first locking member and a second locking member;

[0013] A long hole connected to the mounting groove on the side wall is provided on one side wall of the column, and a first locking hole is provided at a corresponding position on the side wall of the first fixing member. The first locking member passes through the long hole and is locked with the first locking hole, thereby locking the measuring block and the first fixing member on the column;

[0014] A second locking hole is provided at a corresponding position on the side wall of the second fixing member. The second locking member passes through the long hole and is locked with the second locking hole, thereby locking the measuring meter frame and the second fixing member on the column.

[0015] Furthermore, it also includes a first support spring, a second support spring and a top cover;

[0016] The first support spring is located below the first fixing member, and two ends of the first support spring are respectively connected to the first fixing member and the inner wall of the U-shaped bottom of the column;

[0017] The second support spring is located above the first fixing member, and two ends of the second support spring are respectively connected to the first fixing member and the second fixing member;

[0018] The top cover is located above the column and connected to the column.

[0019] Furthermore, a mounting chuck is provided at one end of the measuring meter frame away from the second fixing member for mounting the measuring meter.

[0020] Furthermore, a third locking hole is provided at the outer end of the mounting chuck, and a bolt is passed through the third locking hole to fasten the measuring meter to the mounting chuck.

[0021] Furthermore, the support member is a V-shaped block, and the side wall and the bottom of the support member are respectively provided with weight-reducing grooves.

[0022] Furthermore, a weight-reducing groove is provided on the base.

[0023] Furthermore, the column and the base are an integrated structure.

[0024] Furthermore, the measuring block and the first fixing member are an integrated structure; the measuring table frame and the second fixing member are an integrated structure.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] 1. The utility model provides a single-reference intermediate shaft keyway symmetry measuring fixture, which has a simple structure and is convenient to read, and can realize on-site measurement of machining, thereby reducing measurement costs and improving measurement efficiency.

[0027] 2. The utility model provides a single-reference intermediate shaft keyway symmetry measuring fixture, which can respectively lock the positions of the measuring block and the measuring table through the first locking member and the second locking member, thereby improving the measurement accuracy.

[0028] 3. The utility model provides a single-reference intermediate shaft keyway symmetry measuring fixture, which can improve the stability of the measuring block and the measuring table during use through the design of the first supporting spring and the second supporting spring.

[0029] 4. In the single-reference intermediate shaft keyway symmetry measuring fixture provided by the utility model, the measuring block can move up and down in the measuring channel on the column, is not affected by the diameter specifications of the parts, and can meet the online measurement of the symmetry of the single-reference intermediate shaft keyway of various sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0031] Figure 2 It is a schematic diagram of the connection state of the column and the base in the embodiment of the utility model.

[0032] Figure 3 It is a schematic diagram of the connection state between the measuring block and the first fixing member in an embodiment of the utility model.

[0033] Figure 4 It is a schematic diagram of the connection state of the measuring meter frame and the second fixing member in the embodiment of the utility model.

[0034] Figure 5 It is a schematic diagram of the structure of the support member in the embodiment of the utility model.

[0035] Figure 6 It is a schematic diagram of the installation structure of the first support spring and the second support spring in an embodiment of the utility model.

[0036] The reference numerals are as follows:

[0037] 1-support member, 2-base, 3-column, 4-first fixing member, 5-second fixing member, 6-measuring channel, 7-mounting groove, 8-measuring block, 9-measuring table, 10-measuring table frame, 11-intermediate shaft to be measured, 12-first locking member, 13-second locking member, 14-long hole, 15-first locking hole, 16-second locking hole, 17-first supporting spring, 18-second supporting spring, 19-top cover, 20-mounting chuck, 21-third locking hole, 22-first weight reduction groove, 23-second weight reduction groove. DETAILED DESCRIPTION

[0038] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] like Figure 1 As shown, this embodiment provides a single reference intermediate shaft keyway symmetry measuring fixture, including a fixing assembly, a measuring assembly and a support member 1. The fixing assembly includes a base 2, a column 3, a first fixing member 4 and a second fixing member 5.

[0040] like Figure 2 As shown, the column 3 is a U-shaped structure, and its U-shaped bottom is installed on the base 2. The base 2 is provided with a second weight-reducing groove 23 for reducing the weight of the base 2. In this embodiment, the column 3 and the base 2 can also be processed into an integrated structure as needed. The hollow part of the U-shaped structure is the measuring channel 6, and the two side walls of the measuring channel 6 are respectively provided with mounting grooves 7.

[0041] Combination Figure 1 and Figure 3 As shown, the measuring assembly includes a measuring block 8, a measuring meter 9 and a measuring meter stand 10. The measuring block 8 is a long strip structure, and its width is adapted to the width of the measuring channel 6. The first fixing member 4 is sleeved on the measuring block 8 and installed in the mounting groove 7; the width of the first fixing member 4 is adapted to the distance between the bottoms of the two mounting grooves 7, and the length of the first fixing member 4 along the length direction of the measuring block 8 is adapted to the groove width of the mounting groove 7. The measuring block 8 is horizontally installed in the measuring channel 6 through the first fixing member 4, and both ends extend out of the measuring channel 6. In order to improve the efficiency of assembly, the measuring block 8 and the first fixing member 4 can also be designed as an integrated structure.

[0042] Combination Figure 1 and Figure 4As shown, the measuring meter frame 10 is located above the measuring block 8 and parallel to the measuring block 8. The measuring meter frame 10 is also a long strip structure, and its width is adapted to the width of the measuring channel 6. The second fixing member 5 is sleeved on one end of the measuring meter frame 10 and installed in the mounting groove 7; the width of the second fixing member 5 is adapted to the distance between the bottoms of the two mounting grooves 7, and the length of the first fixing member 4 along the length direction of the measuring meter frame 10 is adapted to the groove width of the mounting groove 7. In order to improve the efficiency of assembly, the measuring meter frame 10 and the second fixing member 5 can also be designed as an integrated structure.

[0043] The other end of the measuring meter frame 10 extends out of the measuring channel 6, and is used to install the measuring meter 9, and the measuring end of the measuring meter 9 faces downward. The specific installation method is that a mounting chuck 20 is provided at one end of the measuring meter frame 10 away from the second fixing member 5, and the measuring meter 9 is installed in the mounting chuck 20. A third locking hole 21 is also provided at the outer end of the mounting chuck 20, and a bolt is passed through the third locking hole 21 to fasten the measuring meter 9 to the mounting chuck 20, thereby improving the stability of the installation of the measuring meter 9.

[0044] During measurement, the measuring end of the measuring gauge 9 contacts the upper surface of one end of the measuring block 8, and the other end of the measuring block 8 is used to extend into the keyway of the intermediate shaft 11 to be measured for measurement. In this embodiment, the thickness of the measuring block 8 is adapted to the slot width of the keyway of the intermediate shaft 11 to be measured.

[0045] This embodiment further includes a first locking member 12 and a second locking member 13. A long hole 14 communicating with the mounting groove 7 on the side wall is provided on one side wall of the column 3, and a first locking hole 15 is provided at a corresponding position on the side wall of the first fixing member 4. The first locking member 12 passes through the long hole 14 and is locked with the first locking hole 15, thereby locking the measuring block 8 and the first fixing member 4 to the inner wall of the column 3.

[0046] A second locking hole 16 is provided at a corresponding position on the side wall of the second fixing member 5 . The second locking member 13 passes through the long hole 14 and is locked with the second locking hole 16 , thereby locking the measuring meter frame 10 and the second fixing member 5 to the inner wall of the column 3 .

[0047] Combination Figure 1 and Figure 6 As shown, in order to improve the working stability and safety of the measuring block and the measuring table, the present embodiment further includes a first support spring 17, a second support spring 18 and a top cover 19. The first support spring 17 is located below the first fixing member 4, and its two ends are respectively connected to the first fixing member 4 and the inner wall of the U-shaped bottom of the column 3. The second support spring 18 is located above the first fixing member 4, and its two ends are respectively connected to the first fixing member 4 and the second fixing member 5. The top cover 19 is located above the column 3 and connected to the column 3.

[0048] like Figure 5As shown, the support member 1 is a V-shaped block for supporting the intermediate shaft 11 to be tested, and the side wall and the bottom of the support member 1 are respectively provided with a first weight-reducing groove 22 for reducing the weight of the support member 1.

[0049] Combination Figures 1 to 6 , the measurement process of the utility model is as follows:

[0050] First, install the column 3 on the base 2 in sequence, install the measuring block 8 on the column 3 through the first fixing member 4, install the measuring meter 9 in the mounting chuck 20 of the measuring meter frame 10 and lock it, and then install the measuring meter frame 10 on the column 3 through the second fixing member 5.

[0051] Secondly, the intermediate shaft 11 to be measured is placed on the support 1 so that the keyway of the intermediate shaft 11 to be measured faces the measuring block 8 .

[0052] Next, adjust the installation height of the measuring block 8 according to the position of the keyway, and extend the other end of the measuring block 8 into the keyway so that the end of the measuring block 8 fits tightly against the bottom of the keyway, and the upper and lower end faces of the measuring block 8 fit tightly against the walls of the keyway respectively. At this time, the keyway of the intermediate shaft 11 to be measured is automatically leveled, and the measuring block 8 is locked on the column 3 together with the first fixing member 4 through the first locking member 12; then adjust the installation position of the measuring meter frame 10 so that the measuring end of the measuring meter 9 abuts against the upper surface of one end of the measuring block 8 (that is, the measuring meter 9 must have a reading), and then lock the measuring meter frame 10 together with the second fixing member 5 on the column 3 through the second locking member 13. At this time, the reading displayed on the measuring meter 9 is a1.

[0053] Then, the intermediate shaft 11 to be measured is horizontally flipped 180°, and the measuring block 4 together with the first fixing member 4 is loosened from the column 3, and the other end of the measuring block 8 is inserted into the keyway, so that the end of the measuring block 8 is tightly fitted with the bottom of the keyway, and the upper and lower end faces of the measuring block 8 are tightly fitted with the groove walls of the keyway respectively. At this time, the keyway of the intermediate shaft 11 to be measured is automatically leveled, and the measuring block 8 together with the first fixing member 4 is locked on the column 3 again by the first locking member 12; at this time, the reading displayed on the measuring meter 9 is a2.

[0054] Finally, the symmetry of the keyway of the intermediate shaft 11 to be tested is obtained by calculation. The specific algorithm is:

[0055] Symmetry Wherein h is the depth of the keyway; d is the outer diameter of the intermediate shaft 11 to be measured; Δa is the difference between the readings on the two sides of the keyway, that is, Δa=|a1-a2|.

[0056] Then, the above method is used to measure the symmetry b2, b3 at different axial positions of the keyway respectively, and finally the maximum value bmax={b1, b2, b3} among the symmetries is taken. This bmax is the symmetry of the keyway of the intermediate shaft 11 to be measured.

[0057] The measuring fixture provided in this embodiment can realize the rapid measurement of the keyway symmetry of the intermediate shaft 11 to be measured. The measuring process is simple and the measuring accuracy is high. It can meet the online measurement of the keyway symmetry of a single reference intermediate shaft of various sizes.

[0058] Based on the above embodiments, it is sufficient for a person skilled in the art to implement the present invention through the contents of the present invention. Within the framework of the claims, any improvement based on the idea of ​​the present invention is deemed to fall within the protection scope of the present invention.

Claims

1. A single-reference intermediate shaft keyway symmetry measuring fixture, characterized in that: It comprises a fixing component, a measuring component and a supporting component (1); The fixing assembly comprises a base (2), a column (3), a first fixing member (4) and a second fixing member (5); the column (3) is in a U-shaped structure, and its U-shaped bottom is mounted on the base (2); the hollow portion of the U-shaped structure is a measuring channel (6), and mounting grooves (7) are respectively provided on two side walls of the measuring channel (6); The measuring assembly comprises a measuring block (8), a measuring meter (9) and a measuring meter stand (10); the measuring block (8) is a long strip structure, and its width is adapted to the width of the measuring channel (6); the first fixing member (4) is sleeved on the measuring block (8) and installed in the installation groove (7); the measuring block (8) is horizontally installed in the measuring channel (6) through the first fixing member (4), and both ends extend out of the measuring channel (6); The measuring meter frame (10) is located above the measuring block (8) and parallel to the measuring block (8); the width of the measuring meter frame (10) is matched with the width of the measuring channel (6); the second fixing member (5) is sleeved on one end of the measuring meter frame (10) and installed in the installation groove (7); the other end of the measuring meter frame (10) extends out of the measuring channel (6) and is used to install the measuring meter (9); the measuring end of the measuring meter (9) faces downward and contacts the upper surface of one end of the measuring block (8); the other end of the measuring block (8) is used to extend into the keyway of the intermediate shaft (11) to be measured for measurement; the thickness of the measuring block (8) is matched with the slot width of the keyway of the intermediate shaft (11) to be measured; The support member (1) is used to support the intermediate shaft (11) to be tested.

2. The single reference intermediate shaft keyway symmetry measuring fixture according to claim 1 is characterized in that: It also includes a first locking member (12) and a second locking member (13); A long hole (14) is provided on one side wall of the column (3) and is connected to the mounting groove (7) on the side wall. A first locking hole (15) is provided at a corresponding position on the side wall of the first fixing member (4). The first locking member (12) passes through the long hole (14) and is locked with the first locking hole (15), thereby locking the measuring block (8) and the first fixing member (4) on the column (3). A second locking hole (16) is provided at a corresponding position on the side wall of the second fixing member (5); the second locking member (13) passes through the long hole (14) and is locked with the second locking hole (16), thereby locking the measuring meter frame (10) and the second fixing member (5) on the column (3).

3. The single reference intermediate shaft keyway symmetry measuring fixture according to claim 2, characterized in that: It also includes a first support spring (17), a second support spring (18) and a top cover (19); The first support spring (17) is located below the first fixing member (4), and its two ends are respectively connected to the first fixing member (4) and the inner wall of the U-shaped bottom of the column (3); The second support spring (18) is located above the first fixing member (4), and two ends thereof are respectively connected to the first fixing member (4) and the second fixing member (5); The top cover (19) is located above the column (3) and is connected to the column (3).

4. The single reference intermediate shaft keyway symmetry measuring jig according to claim 3 is characterized in that: An end of the measuring meter frame (10) away from the second fixing member (5) is provided with a mounting clamp (20) for mounting the measuring meter (9).

5. The single reference intermediate shaft keyway symmetry measuring jig according to claim 4, characterized in that: The outer end of the mounting clamp (20) is provided with a third locking hole (21), and a bolt is passed through the third locking hole (21) to fasten the measuring meter (9) to the mounting clamp (20).

6. The single reference intermediate shaft keyway symmetry measuring jig according to any one of claims 1 to 5, characterized in that: The support member (1) is a V-shaped block, and the side wall and the bottom of the support member (1) are respectively provided with a first weight-reducing groove (22).

7. The single reference intermediate shaft keyway symmetry measuring jig according to claim 6, characterized in that: The base (2) is provided with a second weight-reducing groove (23).

8. The single reference intermediate shaft keyway symmetry measuring jig according to claim 7, characterized in that: The upright column (3) and the base (2) are an integrated structure.

9. The single reference intermediate shaft keyway symmetry measuring jig according to claim 7, characterized in that: The measuring block (8) and the first fixing member (4) are an integrated structure; The measuring meter frame (10) and the second fixing member (5) are an integrated structure.

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