Detection tool for measuring center distance of eccentric hole of shaft gear

Abstract

The utility model discloses a testing fixture for measuring the center distance of an eccentric hole of a shaft gear, which comprises a testing fixture main body disc, a guide sleeve is arranged at the center of the testing fixture main body disc, one ends of a plurality of positioning screws are arranged on the testing fixture main body disc, and the other ends of the positioning screws are arranged in side edge positioning pins. The gauge is convenient to use and high in measurement precision. Compared with an original vernier caliper which firstly measures the distance between the edges of the two center holes and then converts the center distance, the center distance gauge is higher in measurement precision, the center distances of all the center holes can be measured at a time for parts of the same type, the measurement efficiency is improved, and errors can be conveniently detected in the middle process during online machining.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile parts, and relates to a detection device of shaft gear, in particular to a gauge for measuring the center distance of eccentric hole of shaft gear. BACKGROUND

[0002] With the emergence of high-precision products such as new energy parts and CVT in the field of automobiles, deep hole machining gradually emerges in the use of parts for forced lubrication. Considering the weight reduction factor, the design of eccentric hole of shaft head also emerges for CVT, Ford shaft and other shaft gear parts. For deep hole machining, the conventional special deep hole drilling equipment is currently adopted, and the corresponding deep hole measurement can meet the requirements by selecting different specifications of depth gauges according to different hole diameters and depths. However, there is currently a lack of effective on-site rapid detection method for eccentric hole measurement. In the front-line machining of the workshop, the center distance of the eccentric hole is usually measured by a three-coordinate instrument for the first piece of machined parts. However, this method is time-consuming and labor-intensive, and has low efficiency. Moreover, the hole error occurring in the machining process cannot be detected. SUMMARY

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a gauge for measuring the center distance of the eccentric hole of the shaft gear, which solves the technical problems of time-consuming and labor-intensive, low efficiency and undetectable error in measuring the center distance of the eccentric hole of the shaft gear part in the prior art.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A gauge for measuring the center distance of the eccentric hole of the shaft gear, comprising a gauge main body disc, a guide sleeve installed at the center of the gauge main body disc, and one end of a plurality of positioning screws installed on the gauge main body disc, and the other end of the positioning screws installed in the side edge positioning pin.

[0006] The gauge main body disc comprises a disc body, a disc body center hole is formed at the center of the disc body, the disc body center hole is a cylindrical structure, and the guide sleeve is installed in the disc body center hole; a plurality of disc body step holes are formed on the disc body, the plurality of disc body step holes are arranged around the disc body center hole, and the positioning screws are installed in the disc body step holes.

[0007] The main body of the guide sleeve comprises an integrally arranged guide sleeve small end segment and a guide sleeve large end segment, a guide sleeve shoulder is arranged between the guide sleeve small end segment and the guide sleeve large end segment, the guide sleeve small end segment is installed in the disc body center hole, and the guide sleeve shoulder is in contact with the disc body; the inner hole of the guide sleeve comprises a guide sleeve shoulder transition hole and a guide sleeve center hole, the guide sleeve shoulder transition hole is a circular truncated cone structure, and the guide sleeve center hole is a cylindrical structure.

[0008] The body of the positioning screw comprises a positioning screw rod and a positioning screw base which are integrally arranged, and a positioning screw hole is formed in the positioning screw base.

[0009] The side positioning pin comprises a pin body, and a pin hole is formed in the pin body, wherein the pin hole is a threaded hole, and the positioning screw is arranged in the pin hole.

[0010] The utility model also has the following technical features:

[0011] The inner hole of the guide sleeve is provided with a center positioning pin which penetrates the main body disc of the gauge and the guide sleeve; the structure of the center positioning pin arranged in the guide sleeve is completely same as that of the side positioning pin.

[0012] A shaft head positioning groove is formed on one side of the disc body, and the cross section of the shaft head positioning groove is a trapezoidal surface.

[0013] The taper angle of the shaft head positioning groove is W; the value range of W is 60°-90°.

[0014] Compared with the prior art, the utility model has the following technical effects:

[0015] (I) The gauge is convenient to use and has high measurement accuracy. Compared with the original vernier caliper which measures the distance between the edges of two center holes and then converts the center distance size, the center distance gauge has higher measurement accuracy, can measure the center distance of all center holes of the same type of part at one time, improves the measurement efficiency, and is convenient for verifying the error in the intermediate process during online processing.

[0016] (II) The part is convenient to replace. For eccentric holes of different diameters of the same type of part, only the positioning pin of different diameters needs to be replaced, so that eccentric holes of different diameters can be measured, the inner thread size of the other end of the positioning pin remains unchanged, and the original screw can be conveniently used for connection. At the same time, the body is replaced for eccentric holes of different types of center distance, so that different parts can be measured.

[0017] (III) The detection cost of the utility model is low. The traditional three-coordinate instrument measurement is time-consuming and has high detection cost. The center distance gauge has improved measurement efficiency and low gauge manufacturing cost. The screw can be modified by using a standard screw, and the positioning pin can be modified by using a standard type positioning pin, so that the processing cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an overall structural schematic view of the gauge for measuring the center distance of the eccentric hole of the shaft gear.

[0019] Figure 2 It is a sectional view of the gauge for measuring the center distance of the eccentric hole of the shaft gear.

[0020] Figure 3 The top view of the gauge for measuring the center distance of the eccentric hole of the shaft gear.

[0021] Figure 4 The structural schematic view of the gauge body disc. Figure 4 (A) is a bottom view, and (B) is a sectional view.

[0022] Figure 5 The structural schematic view of the guide sleeve. Figure 5 (A) is a top view, and (B) is a sectional view.

[0023] Figure 6 The structural schematic view of the positioning screw. Figure 6 (A) is a top view, and (B) is a sectional view.

[0024] Figure 7 The structural schematic view of the side positioning pin. Figure 7 (A) is a top view, and (B) is a sectional view.

[0025] Figure 8 The structural schematic view of the shaft gear to be detected.

[0026] The meanings of the numbers in the figure are as follows: 1, gauge body disc; 2, guide sleeve; 3, positioning screw; 4, side positioning pin; 5, shaft gear to be detected.

[0027] 101, disc body; 102, disc body center hole; 103, disc body step hole; 104, shaft head positioning groove.

[0028] 201, guide sleeve small end section; 202, guide sleeve large end section; 203, guide sleeve shoulder; 204, guide sleeve shoulder transition hole; 205, guide sleeve center hole.

[0029] 301, positioning screw rod; 302, positioning screw table; 303, positioning screw inner hole.

[0030] 401, positioning pin body; 402, positioning pin inner hole.

[0031] 501, shaft gear body; 502, shaft gear center hole; 503, shaft gear eccentric hole.

[0032] The specific content in the utility model is further explained and described in detail in combination with the embodiments. DETAILED DESCRIPTION

[0033] It should be noted that all the parts in the utility model, without special description, adopt the parts known in the art, for example: the shaft gear 5 to be detected is a conventional shaft gear known in the prior art, and its structure is as shown in the figure. Figure 8As shown, including shaft gear body 501, shaft gear body 501 in the shaft gear center hole 502 and shaft gear eccentric hole 503 are set up.

[0034] The following gives the specific embodiments in the present application, it should be noted that the present application is not limited to the following specific embodiments, any equivalent transformation made on the basis of the technical scheme of the present application falls within the scope of the present application.

[0035] Embodiment:

[0036] The present embodiment gives a kind of measuring shaft gear eccentric hole center distance gauge, as shown in Figure 1 、 Figure 2 And Figure 3 As shown, including gauge body disc 1, the center of gauge body disc 1 is equipped with guide sleeve 2, one end of the multiple positioning screws 3 installed on gauge body disc 1, the other end of positioning screw 3 is installed in side edge positioning pin 4.

[0037] As a specific scheme of the present embodiment, as shown in Figure 4 Gauge body disc 1 includes disc body 101, disc body 101 is equipped with disc body center hole 102 at the center, disc body center hole 102 is cylindrical structure, guide sleeve 2 is installed in disc body center hole 102;Multiple disc body step holes 103 are set up on disc body 101, multiple disc body step holes 103 are around the periphery of disc body center hole 102, positioning screw 3 is installed in disc body step hole 103.

[0038] As a specific scheme of the present embodiment, as shown in Figure 5 The main part of guide sleeve 2 includes integrally arranged guide sleeve small end section 201 and guide sleeve large end section 202, guide sleeve shoulder 203 is arranged between guide sleeve small end section 201 and guide sleeve large end section 202;Guide sleeve small end section 201 is installed in disc body center hole 102, guide sleeve shoulder 203 is in contact with disc body 101;The inner hole of guide sleeve 2 includes guide sleeve table transition hole 204 and guide sleeve center hole 205 in communication, guide sleeve table transition hole 204 is circular truncated cone structure, guide sleeve center hole 205 is cylindrical structure.

[0039] As a specific scheme of the present embodiment, as shown in Figure 6 The main part of positioning screw 3 includes integrally arranged positioning screw rod 301 and positioning screw table 302, positioning screw inner hole 303 is set up in positioning screw table 302.

[0040] As a specific scheme of the present embodiment, as shown in Figure 7 Side edge positioning pin 4 includes positioning pin main body 401, positioning pin inner hole 402 is set up in positioning pin main body 401, positioning pin inner hole 402 is threaded hole, positioning screw 3 is installed in positioning pin inner hole 402.

[0041] As a specific scheme of the embodiment, a center positioning pin (not shown in the figure) is arranged in the inner hole of the guide sleeve 2, and the center positioning pin penetrates the gauge main body disc 1 and the guide sleeve 2; the structure of the center positioning pin arranged in the guide sleeve 2 is completely same as that of the side positioning pin 4.

[0042] As a specific scheme of the embodiment, as shown in the figure, Figure 5 the inner diameter of the guide sleeve center hole 205 is d D (unit: mm), and the value of d D is consistent with the inner hole diameter of the shaft gear 5 to be detected; the inner diameter of the guide sleeve center hole 205 is slightly smaller than the outer diameter of the center positioning pin.

[0043] As a specific scheme of the embodiment, as shown in the figure, Figure 4 a shaft head positioning groove 104 is arranged on one side of the disc body 101, and the cross-sectional shape of the shaft head positioning groove 104 is a trapezoidal surface; the shaft head positioning groove 104 is used for positioning the shaft head of the shaft gear 5 to be detected.

[0044] As a specific scheme of the embodiment, as shown in the figure, Figure 4 the minimum diameter of the shaft head positioning groove 104 is d A (unit: mm), and the maximum diameter of the shaft head positioning groove 104 is d B (unit: mm); the value of d A is generally 5mm smaller than the small end diameter size of the shaft head chamfer of the measured part, and the value of d B is generally 5mm larger than the large end diameter size of the shaft head chamfer of the shaft gear 5 to be detected.

[0045] As a specific scheme of the embodiment, as shown in the figure, Figure 4 the taper angle of the shaft head positioning groove 104 is W, and the unit is °; the value range of W is 60°-90°.

[0046] The design idea and principle of the utility model are as follows:

[0047] Since the existing deep holes are all machined on the shaft head of the shaft gear, the main body of the fixture 1 is designed as a circular structure for better fit. The main body of the fixture 1 has stepped holes 103 on the circular position. The number and center position of the stepped holes 103 are completely consistent with the center position and number of the eccentric holes 503 of the shaft gear. Then, a side positioning pin 4 is inserted inside the stepped hole 103. The side positioning pin 4 is a cylindrical structure. A positioning pin inner hole 402 is opened at the center of one end of the side positioning pin 4. The number of side positioning pins 4 is completely the same as the number of stepped holes 103 and the number of eccentric holes 503 of the shaft gear. The outer diameter of the side positioning pin 4 is slightly smaller than the diameter of the eccentric hole 503 of the shaft gear, so that it can be inserted into the eccentric hole 503 of the shaft gear as a whole. At the same time, the outer diameter of the side positioning pin 4 is also slightly smaller than the diameter of the stepped hole 103 of the fixture 1. Finally, a positioning screw 3 is added. The positioning screw 3 can be a standard screw or a non-standard one. The positioning screw 3 has a positioning screw base 302 on one side, which is inserted into the stepped hole 103 of the stepped plate body in the middle part of the main body of the fixture 1. The other side is connected by threads and a side positioning pin 4 with an internal threaded hole. In this way, when the whole is used for measurement, there is no need to worry about the positioning pin 4 falling into the deep hole of the shaft gear eccentric hole 503.

[0048] When measuring the center distance of the eccentric holes 503 of the shaft gears, it is first necessary to ensure that the position of the center hole 502 of the shaft gear is at the center of the circle. This serves as a reference before measuring the center distance of the eccentric holes 503 of the remaining shaft gears. Therefore, the diameter d of the guide sleeve center hole 205 is designed... D Slightly larger than the diameter of the center hole 502 of the shaft gear, the guide sleeve 2 is inserted into the center hole of the fixture body disk 1. The W on the right side of the fixture body disk 1 needs to be exactly the same as the chamfer angle of the shaft head of the shaft gear 5 to be inspected. The chamfer diameter of the shaft head of the shaft gear 5 to be inspected also needs to be at the tip d of the inclined cone surface of the fixture body disk 1. B and d A Within the size range. When using it in this way, first rely on the right side W of the main body disk 1 and the size d of the apex of the inclined cone. B and d A To achieve the positioning of the shaft head of the gear 5 to be tested, a center positioning pin is then passed through the center hole of the guide sleeve 2 and inserted into the center hole 502 of the gear shaft to ensure that the center hole is in the center position without deviation, and then the eccentricity is tested in sequence.

[0049] The usage process of this utility model is as follows:

[0050] First, according to the hole diameter, number and position of the shaft gear eccentric hole 503, the corresponding disc body step hole 103 is opened on the gauge body disc 1 to ensure that the disc body step hole 103 and the shaft gear eccentric hole 503 meet the required size and shape tolerance, etc. Then, the appropriate side positioning pin 4 is selected according to the hole diameter size of the shaft gear eccentric hole 503. The outer diameter of the side positioning pin 4 is slightly smaller than the hole diameter of the shaft gear eccentric hole 503, so that the side positioning pin 4 can be inserted into the shaft gear eccentric hole 503. The number of side positioning pins 4 is consistent with the number of shaft gear eccentric holes 503. A certain depth of positioning pin inner hole 402 is opened at the center of the shaft head of one end of the side positioning pin 4. The corresponding size of the positioning screw 3 is selected to ensure that the positioning screw 3 can be connected with the internal thread of the positioning pin inner hole 402. Finally, the entire center distance gauge is assembled into one body. During assembly, the positioning screw 3 with the positioning screw flange 302 is inserted into the disc body step hole 103, and the other end of the positioning screw is tightly connected with one end of the positioning pin inner hole 402 of the side positioning pin 4. After the side positioning pin 4 is inserted into the shaft gear eccentric hole 503, it will not fall into the hole. After assembly, the corresponding parts can be detected.

[0051] First, when detecting the size of the shaft gear eccentric hole 503, only the side positioning pin 4 distributed on the gauge body disc 1 needs to be inserted into the corresponding shaft gear eccentric hole 503 to quickly determine whether the center distance of the shaft gear eccentric hole 503 is appropriate. If the positioning pin can be completely inserted into the shaft gear eccentric hole 503, the center distance is appropriate. If part of the positioning pin cannot be completely inserted into the shaft gear eccentric hole 503, the size of the shaft gear eccentric hole 503 of the detected shaft gear 5 is not appropriate.

[0052] Third, before detecting the center distance of the shaft gear eccentric hole 503, the center hole 502 of the shaft gear needs to be determined at the center position, which is used as a reference to measure the center distance of the remaining shaft gear eccentric hole 503. When the shaft gear center hole 502 is processed on the deep hole drilling machine, the shaft head chamfer size of the detected shaft gear 5 at both ends is used as a reference to ensure the coaxiality of the outer circle and the center hole. Therefore, the measurement is also based on this principle. The guide sleeve 2 passes through the center hole of the gauge body disc 1. The inner hole diameter dD of the guide sleeve 2 is slightly larger than the hole diameter of the shaft gear center hole 502. The W on the right side of the gauge body disc 1 needs to be completely consistent with the shaft head chamfer angle of the detected shaft gear 5. The shaft head chamfer diameter of the detected shaft gear 5 also needs to be within the size range of the taper point d B and d A of the gauge body disc 1. In this way, when using, first rely on the W on the right side of the gauge body disc 1 and the taper point size d B and d AThe shaft head positioning of the shaft gear 5 to be detected is realized, then a side positioning pin 4 is passed through the center hole of the guide sleeve 2 and extends into the center hole 502 of the shaft gear, so as to ensure that the center hole is in the central position without deviation, and then the eccentricity is detected in sequence.

[0053] As can be known from the above, in use, the side positioning pin is inserted into the hole on the distribution circle of the main body disc of the gauge, the diameter of the side positioning pin is consistent with the hole diameter of the eccentric hole 503 of the shaft gear, the other end of the side positioning pin is connected with the positioning screw, and when the one end of the side positioning pin on the main body disc of the gauge can be fully inserted into the eccentric hole 503 of the shaft gear, the center distance of the eccentric hole 503 of the shaft gear can be detected to see whether it meets the process processing requirement. This method is suitable for self-checking in the on-site processing process, and the self-checking efficiency and frequency are improved. For the center distance of the eccentric hole 503 of the shaft gear with other hole diameters of the same type, only the corresponding main body disc of the gauge needs to be replaced, the utility model is widely applicable to the processing of the eccentric hole 503 of the shaft gear of the deep hole drill. Moreover, the positioning screw and the positioning pin in the gauge can also be modified by using standard parts, so that the gauge is convenient to manufacture and the manufacturing cost of the gauge is saved.

Claims

1. A gauge for measuring the center distance of an eccentric bore of a shaft gear, characterized by, Including the main body of the gauge disc (1), the center of the main body of the gauge disc (1) is provided with a guide sleeve (2), one end of the main body of the gauge disc (1) is provided with a plurality of positioning screws (3), and the other end of the positioning screw (3) is installed in the side positioning pin (4); The main body of the gauge disc (1) comprises a disc body (101), a disc body center hole (102) is formed at the center of the disc body (101), the disc body center hole (102) is a cylindrical structure, and the guide sleeve (2) is installed in the disc body center hole (102); a plurality of disc body step holes (103) are formed in the disc body (101), the plurality of disc body step holes (103) are arranged around the disc body center hole (102), and the positioning screw (3) is installed in the disc body step hole (103); The main body of the guide sleeve (2) comprises a guide sleeve small end section (201) and a guide sleeve large end section (202) which are integrally arranged, and a guide sleeve shoulder (203) is arranged between the guide sleeve small end section (201) and the guide sleeve large end section (202); the guide sleeve small end section (201) is installed in the disc body center hole (102), and the guide sleeve shoulder (203) is in contact with the disc body (101); the inner hole of the guide sleeve (2) comprises a guide sleeve shoulder transition hole (204) and a guide sleeve center hole (205), the guide sleeve shoulder transition hole (204) is a circular truncated cone structure, and the guide sleeve center hole (205) is a cylindrical structure; The main body of the positioning screw (3) comprises a positioning screw rod (301) and a positioning screw table (302) which are integrally arranged, and a positioning screw inner hole (303) is formed in the positioning screw table (302); The side positioning pin (4) comprises a positioning pin main body (401), a positioning pin inner hole (402) is formed in the positioning pin main body (401), the positioning pin inner hole (402) is a threaded hole, and the positioning screw (3) is installed in the positioning pin inner hole (402).

2. The gage of claim 1 wherein, The inner hole of the guide sleeve (2) is provided with a center positioning pin which penetrates the main body of the gauge disc (1) and the guide sleeve (2); the structure of the center positioning pin arranged in the guide sleeve (2) is exactly the same as that of the side positioning pin (4).

3. The gage of claim 1 wherein, The disc body (101) is provided with an axle head positioning groove (104) on one side, and the cross-sectional shape of the axle head positioning groove (104) is a trapezoidal surface.

4. The gage of claim 3 wherein, The taper angle of the axle head positioning groove (104) is W; the value range of W is 60°-90°.

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