Self-clamping double-sliding-table device for detecting M value of internal spline of thin-wall ring gear ring

Abstract

The invention discloses a self-clamping double-sliding-table device for detecting an M value of an internal spline of a thin-wall ring gear, relates to the technical field of internal spline M value measurement, and aims to solve the problem that M measurement is inaccurate due to the fact that the internal spline of the thin-wall ring gear is easy to deform during M value measurement in the prior art. The device comprises a base, a positioning plate, a fixed measuring head, a dial indicator, an X-direction sliding table, a movable measuring head, a measuring support, a workpiece clamping wheel, a clamping sliding table, a cam, a clamping sliding table supporting block and an X-direction sliding table supporting block. During measurement, a ring gear ring is placed on a gauge positioning plate surface, an inner tooth groove of the ring gear ring is hung on a fixed measuring head by means of self weight, and then a movable measuring head mounted on a sliding table and a workpiece clamping wheel mounted on a clamping sliding table are pushed into the other tooth groove to be measured through the clamping sliding table under the driving of spring force. The distance between the two measuring head steel balls is an M value to be measured. The influence of human and external factors on the measurement result is avoided, and the M value is accurately measured under the condition that the thin-wall ring gear is not deformed.

Description

Technical Field

[0001] The invention relates to the technical field of internal spline M value measurement, and in particular to a self-clamping double-slide device for detecting the M value of an internal spline of a thin-walled ring gear. Background Art

[0002] The power source of new energy electric vehicles basically adopts high-speed motors with a speed of 17,000 to 30,000 revolutions. In this way, the motor can obtain huge driving force by reducing the speed under the condition of small size and small torque. Therefore, it needs to reduce the speed when driving the car wheels. The ideal structure to obtain a large reduction ratio is a device composed of a ring gear, planetary gears and a sun gear. Because they all run at high speeds, the manufacturing accuracy of the geometric parameters of the ring gear, planetary gears and sun gears is an order of magnitude higher than that of the traditional ones. In particular, the thin-walled structure of the ring gear ring is adopted. The diameter size and M value size of the ring gear ring are different when it is placed flat and upright. In this way, when the M value of the ring gear ring is measured with a traditional gauge, the force of the probe is relatively large, which directly causes the deformation of the ring gear ring and affects the accuracy of the M value. Therefore, the traditional M value gauge cannot measure the true M value of the ring gear ring. In order to solve the problem of measuring the M value of thin-walled ring gear rings, foreign technologies generally use a magnetic suction cup structure to measure the ring gear ring after sucking it. However, this measurement method has two problems. First, it leads to the need to add a demagnetization process after measuring the M value of the ring gear ring. Second, the operator must have rich experience. During measurement, the probe must accurately contact and fit the measured tooth to ensure accurate measurement. In domestic technology, a ring with the maximum physical size inner hole of the outer circle of the ring gear ring is used to be sleeved on the outer circle of the ring gear ring. Because the size of the ring gear ring is 170-350 mm, there is a gap between the ring gear ring and the ring with the maximum physical size inner hole of the outer circle of the ring gear ring, which also affects the measurement accuracy. At the same time, since the size of the ring with the maximum physical size inner hole is very large, it makes the ring difficult to manufacture, and because the ring with the maximum physical size is heavy, it brings inconvenience to the operator's measurement operation. Therefore, the measurement of the M value of the ring gear ring is a difficult problem that has not been solved in the field of measurement at home and abroad.

[0003] In the prior art, the traditional M-value gauge structure is a probe fixed to a base, which has no displacement with the base when participating in the measurement, and the other is a movable probe, which is installed on a slide or a slide table. Under the action of the spring force of the slide or the slide table, the movable probe is pushed into the tooth groove to be measured. When measuring, a tooth groove to be measured is first hung on the fixed probe, and then the movable probe is pushed into the tooth groove to be measured. The movement of this probe relative to the fixed probe or the base is collected by the micrometer fixed on the base, and the change on the meter is the M value to be measured; and in order to measure the M value of the spline inside the ring gear without deformation, the two probes must have relative displacement movement with each other, contact and fit with the internal tooth groove to be measured, and there must be no mutual expansion force between the two probes. The source of the measuring force of the two probes on the spline teeth inside the ring gear during measurement is the key to solving this problem.

[0004] In summary, the present invention provides a self-clamping double slide device for measuring the M value of the inner spline of a thin-walled ring gear. Summary of the invention

[0005] In order to solve the problems that the M value of the internal spline of the existing thin-walled ring gear is easily deformed during measurement, which further leads to inaccurate M measurement, the present invention provides a self-clamping double slide device for detecting the M value of the internal spline of the ring gear.

[0006] A self-clamping double slide device for detecting the M value of the inner spline of a thin-walled ring gear, the device comprising a base, a positioning plate, a fixed probe and a micrometer, an X-axis slide, a movable probe, a measuring bracket, a workpiece clamping wheel, a clamping slide, a cam, a clamping slide support block and an X-axis slide support block;

[0007] The fixed end of the X-axis slide is fastened to the base, and the movable probe, the measuring bracket and the clamping slide are installed on the movable end of the X-axis slide;

[0008] The workpiece clamping wheel is mounted on the clamping slide via a support;

[0009] An X-axis slide support block is installed at the rear end of the movable end of the X-axis slide, and a clamping slide support block is installed on the support; a cam is arranged between the clamping slide support block and the X-axis slide support block; under the action of the clamping force of the clamping slide, the slide support block and the clamping slide support block clamp the cam;

[0010] The probe end of the micrometer is in abutment contact with the measuring bracket;

[0011] The X-axis slide table is not subjected to force when moving, and the clamping slide table is installed with a spring, and the X-axis slide table, the movable probe, the clamping slide table and the workpiece clamping wheel are close to each other and fit together under the action of the spring force;

[0012] Place the ring gear ring on the positioning plate, and the inner tooth groove of the ring gear ring will be in close contact with the fixed probe by its own weight. The cam will rotate to the maximum diameter to open the slide support block and the clamping slide support block, and the distance between the movable probe and the workpiece clamping wheel will be the largest, which is convenient for placing the ring gear ring. When the cam rotates to the minimum diameter position, under the action of the clamping slide, the movable probe will be embedded in another measured tooth groove of the ring gear ring, and the movable probe and the workpiece clamping wheel will clamp the wall thickness of the ring gear ring. At this time, the cam will be separated from the clamping slide support block and the X-axis slide support block, and the position of the X-axis slide moving is the position of the movable probe to the measured tooth groove of the ring gear ring, and the value displayed on the micrometer is the M value of the spline inside the ring gear ring.

[0013] Beneficial effects of the present invention:

[0014] The measuring device of the present invention is designed with a self-clamping double slide device structure so that the ring gear ring will not be deformed during the measurement process of the ring gear ring, thereby making the measured M value more accurate.

[0015] The measuring device of the present invention is that when measuring, the ring gear ring is placed on the positioning plate surface of the inspection fixture, and the tooth groove inside the ring gear ring is hung on the fixed probe by its own weight, and then the movable probe installed on the slide and the workpiece clamping wheel installed on the clamping slide are driven by the spring force of the clamping slide to push the movable probe into another tooth groove to be measured, that is, the movable probe also has the force of pushing into another tooth groove to be measured, and the two probes fit the tooth groove to be measured without any other force between them, and the distance between the two probe steel balls is the M value to be measured. The influence of human and external factors on the measurement results is avoided, and the M value of the thin-walled ring gear ring is accurately measured without deformation.

[0016] In the device described in the present invention, during measurement, the wall thickness of the ring gear is clamped by the force of the workpiece clamping wheel installed on the clamping slide and the movable probe, and the movable probe itself does not have the measuring force exerted on the workpiece by the traditional M-value gauge, and thus the problem of inaccurate M value caused by the ring gear presenting an elliptical shape deformation due to the measuring force will not occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a self-clamping double slide device for detecting the M value of the inner spline of a thin-walled ring gear according to the present invention;

[0018] Figure 2 A top view of a self-clamping double slide device for detecting the M value of a spline in a thin-walled ring gear according to the present invention;

[0019] Figure 3 It is a structural schematic diagram of the positioning plate;

[0020] Figure 4 for Figure 3 CC view;

[0021] Figure 5 It is a schematic diagram of the structure of the measurement bracket;

[0022] Figure 6 It is the side view of the measurement bracket;

[0023] Figure 7 is a structural diagram of the support;

[0024] Figure 8 is a top view of the support;

[0025] Fig. 9 It is a structural diagram of the cam;

[0026] Fig.10 for Fig. 9 AA view;

[0027] Fig.11 It is a structural schematic diagram of the camshaft;

[0028] Fig.12 is a structural schematic diagram of a cam support;

[0029] Fig.13 for Fig.12 BB direction view.

[0030] In the figure: 1, base, 2, fixed probe support, 3, positioning plate, 4, fixed probe, 5, X-axis slide, 6, movable probe support, 7, movable probe, 8, measuring bracket, 9, workpiece clamping wheel, 10, support, 11, clamping slide, 12, cam, 13, clamping slide support block, 14, micrometer, 15, micrometer support, 16, cam support, 17, X-axis slide support block. DETAILED DESCRIPTION

[0031] Combination Figure 1 and Fig.13 The present embodiment is described as a self-clamping double slide device for detecting the M value of the spline inside a thin-walled ring gear ring. In order to avoid the influence of human factors on the processing results, the base of the device should have a certain inclination angle, which is greater than the self-locking angle. In this way, the ring gear ring is placed on the positioning plate during measurement, and the tooth groove inside the ring gear ring is hung on the fixed probe by its own weight. Then, the movable probe installed on the X-axis slide is driven by the spring force to push into another tooth groove to be measured. In this way, there is naturally a spring force between the two probes. How to make the movable probe have the force to push into the other tooth groove to be measured, and there is no other force between the two probes? For this purpose, a self-clamping double slide measurement structure is designed.

[0032] The self-clamping double slide device described in this embodiment includes a base 1, a fixed probe support 2, a positioning plate 3, a fixed probe 4, an X-axis slide 5, a movable probe support 6, a movable probe 7, a measuring bracket 8, a workpiece clamping wheel 9, a support 10, a clamping slide 11, a cam 12, a clamping slide support block 13, a micrometer 14, a micrometer support 15, a cam support 16 and an X-axis slide support block 17;

[0033] The base 1 is provided with a fixed probe support 2, and the fixed probe 4 is installed on the fixed probe support 2; the base 1 is designed with a certain tilt angle, and the tilt angle must be greater than the self-locking angle of the friction force of the workpiece placed on the surface of the positioning plate 3, to ensure that the fixed probe 4 has both measurement force and that the workpiece cannot be deformed. The positioning plate 3 is fixed to the base 1 through four support columns, and the positioning plate 3 is provided with a long hole for passing the movable probe support 6 and the fixed probe support 2, and the surface of the positioning plate 3 is parallel to the upper surface of the base 1.

[0034] The fixed end of the X-axis slide 5 is fastened to the base 1, and the movable probe support 6, the measuring bracket 8 and the clamping slide 11 are installed in parallel on the movable end of the X-axis slide 5;

[0035] In this embodiment, the X-axis slide 5 itself is not equipped with a spring and is not subjected to force when moving; the movable probe 7 is installed on the X-axis slide 5 through the movable probe support 6, and the movable probe 7 is not subjected to force in the moving direction of the X-axis slide 5;

[0036] The upper surface of the measuring bracket 8 is not higher than the end surface of the movable end of the clamping slide 11, so as not to affect the movement of the clamping slide 11; the micrometer 14 is fixed on the base 1 through the micrometer support 15, and the probe end of the micrometer 14 is in contact with the measuring bracket 8;

[0037] The workpiece clamping wheel 9 is mounted on the clamping slide 11 through a support 10;

[0038] An X-axis slide support block 17 is installed at the rear end of the movable end of the X-axis slide 5, and a clamping slide support block 13 is installed on the support 10; there is a cam 12 between the clamping slide support block 13 and the X-axis slide support block 17, and the cam 12 is installed on a cam support 16, and the cam support 16 is fixed on the base 1.

[0039] In this embodiment, the X-axis slide 5 is not installed with a spring and is not subjected to force when moving, and the clamping slide 11 is installed with a spring. The X-axis slide 5, the movable probe 7, the clamping slide 11 and the workpiece clamping wheel 9 are close to each other and fit together under the action of the spring force.

[0040] In this embodiment, the clamping slide 11 is installed with a spring so that the movable end of the clamping slide 11 moves in the direction without force; under the action of the clamping force of the clamping slide 11, the slide support block 17 and the clamping slide support block 13 clamp the cam 12.

[0041] In the present embodiment, since the movable probe 7 itself does not have the measuring force exerted on the workpiece by the traditional M-value gauge, the problem of inaccurate M-value caused by the ring gear presenting an elliptical deformation due to the measuring force will not occur. In the present embodiment, the force of the workpiece clamping wheel 9 installed on the clamping slide 11 and the movable probe 7 is utilized.

[0042] The X-axis slide 5 has the same moving direction as the clamping slide 11. The clamping slide 11 is installed with a spring. The X-axis slide 5, the movable probe 7, the clamping slide 11 and the workpiece clamping wheel 9 are close to each other under the action of the spring force. After the ring gear is put in, the movable probe 7 and the workpiece clamping wheel 9 clamp the wall thickness of the ring gear. Because the movable probe 7 and the workpiece clamping wheel 9 are both on the X-axis slide 5, the X-axis slide 5 is not subjected to force when moving, so the ring gear does not deform during measurement.

[0043] In this embodiment, in order to realize the opening and closing movement of the movable probe 7 and the workpiece clamping wheel 9, an X-axis slide support block 17 is installed at the rear end of the X-axis slide 5, and the support 10 is installed with a clamping slide support block 13. The two support blocks are provided with cams 12. When there is no measurement, the cam 12 is rotated to the long axis to spread the two support blocks, and the movable probe 7 and the workpiece clamping wheel 9 are in a separated state. During measurement, the cam 12 is rotated to the short axis and does not contact the two support blocks. The movable probe 7 and the workpiece clamping wheel 9 clamp the wall thickness of the ring gear and support the clamping slide 11.

[0044] The working principle of the self-clamping double slide device described in this embodiment is:

[0045] The ring gear to be measured is placed on the positioning plate 3. Since the base 1 is designed with a certain inclination angle, and the inclination angle must be greater than the self-locking angle of the friction force of the workpiece on the plate surface of the positioning plate 3, the tooth grooves in the ring gear are in close contact with the fixed probe 4 by their own weight; at this time, it is not in the measuring state, and the cam 12 rotates to the long axis, in the state of spreading the clamping slide support block 13 and the X-axis slide support block 17, and the movable probe 7 and the workpiece clamping wheel 9 are also separated; that is, the cam 12 rotates to the maximum diameter to spread the X-axis slide support block 17 and the clamping slide support block 13, and the distance between the movable probe 7 and the workpiece clamping wheel 9 is the largest at this time, which is convenient for placing the ring gear.

[0046] During measurement, the cam 12 rotates to the short axis (the cam 12 rotates to the minimum diameter position), and the movable probe 7 and the workpiece clamping wheel 9 are embedded in another tooth groove of the ring gear ring under the action of the clamping slide 11, and the movable probe 7 and the workpiece clamping wheel 9 clamp the wall thickness of the ring gear ring; and the spring force of the clamping slide 11 is naturally generated between the two probes, without any other force; at this time, the cam 12 will be separated from the clamping slide support block 13 and the X-axis slide support block 17, and there is a distance between them. At this time, the position moved by the X-axis slide 5 is the position of the movable probe 7 to the tooth groove of the ring gear ring to be measured, and the value displayed on the micrometer 14 is the spline M value of the measured ring gear ring.

[0047] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A self-clamping double slide device for detecting the M value of the inner spline of a thin-walled ring gear, the device comprising a base (1), a positioning plate (3), a fixed probe (4) and a micrometer (14); wherein: The device also includes an X-axis slide table (5), a movable probe (7), a measuring bracket (8), a workpiece clamping wheel (9), a clamping slide table (11), a cam (12), a clamping slide table support block (13) and an X-axis slide table support block (17); The fixed end of the X-axis slide table (5) is fastened to the base (1), and the movable probe (7), the measuring bracket (8) and the clamping slide table (11) are installed on the movable end of the X-axis slide table (5); The workpiece clamping wheel (9) is mounted on a clamping slide (11) via a support (10); An X-axis slide support block (17) is installed at the rear end of the movable end of the X-axis slide (5), and a clamping slide support block (13) is installed on the support (10); a cam (12) is arranged between the clamping slide support block (13) and the X-axis slide support block (17); under the clamping force of the clamping slide (11), the slide support block 17 and the clamping slide support block (13) clamp the cam (12); The probe end of the micrometer (14) is in abutment contact with the measuring bracket (8); The X-axis slide (5) is not subjected to force when moving, and the clamping slide (11) is installed with a spring. The X-axis slide (5), the movable probe (7), the clamping slide (11) and the workpiece clamping wheel (9) are close to each other and fit together under the action of the spring force; The ring gear is placed on the positioning plate (3), the inner tooth groove of the ring gear is in close contact with the fixed probe (4) by its own weight, the cam (12) rotates to the maximum diameter to open the slide support block (17) and the clamping slide support block (13), and the distance between the movable probe (7) and the workpiece clamping wheel (9) is the maximum; when the cam (12) rotates to the minimum diameter position, under the action of the clamping slide (11), the movable probe (7) is embedded in another tooth groove of the ring gear to be measured, and the movable probe (7) and the workpiece clamping wheel (9) clamp the wall thickness of the ring gear; at this time, the cam (12) will be separated from the clamping slide support block (13) and the X-axis slide support block (17), and the position of the X-axis slide (5) is the position of the movable probe (7) to the tooth groove of the ring gear to be measured, and the value displayed on the micrometer (14) is the spline M value of the ring gear.

2. A self-clamping double slide device for detecting the M value of the inner spline of a thin-walled ring gear according to claim 1, characterized in that: The base (1) is provided with an inclination angle, and the inclination angle is greater than the self-locking angle of the friction force of the workpiece placed on the surface of the positioning plate (3).

3. A self-clamping double slide device for detecting the M value of the inner spline of a thin-walled ring gear according to claim 1, characterized in that: It also comprises a fixed probe support (2), and the fixed probe (4) is mounted on the base (1) via the fixed probe support (2).

4. A self-clamping double slide device for detecting the M value of the inner spline of a thin-walled ring gear according to claim 1, characterized in that: It also comprises a movable probe support (6), and the movable probe (7) is installed on the X-axis slide table (5) through the movable probe support (6).

5. A self-clamping double slide device for detecting the M value of the inner spline of a thin-walled ring gear according to claim 1, characterized in that: It also comprises a cam support (16), and the cam (12) is mounted on the base (1) via the cam support (16).

6. A self-clamping double slide device for detecting the M value of the inner spline of a thin-walled ring gear according to claim 1, characterized in that: The positioning plate (3) is mounted on the base (1) via a support column, and a long hole for passing a movable probe support (6) and a fixed probe support (2) is provided on the positioning plate (3).

7. A self-clamping double slide device for detecting the M value of the inner spline of a thin-walled ring gear according to claim 1, characterized in that: The measuring bracket (8) is installed on the X-axis slide table (5), and the upper surface of the measuring bracket (8) is not higher than the end surface of the movable end of the clamping slide table (11).

8. The self-clamping double slide device for detecting the M value of the inner spline of a thin-walled ring gear according to claim 1, characterized in that: When the device is not measuring, the cam (12) rotates to the long axis to spread the clamping slide support block (13) and the X-axis slide support block (17), and the movable probe (7) and the workpiece clamping wheel (9) are in a separated state; when measuring, the cam (12) rotates to the short axis and does not contact the clamping slide support block (13) and the X-axis slide support block (17), and the movable probe (7) and the workpiece clamping wheel (9) clamp the wall thickness of the ring gear and support the clamping slide (11).

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