Mechanism for online compensation of stator shrinkage fit depth

Abstract

The invention discloses a mechanism for online compensation of stator shrinkage fit depth, which comprises a press, a press connecting piece, a plurality of first depth range finders, an expansion driver, a stator internal expansion component and a second depth range finder, and is characterized in that the output end of the press is fixed with one end of the press connecting piece, the plurality of first depth range finders are arranged at the other end of the press connecting piece, and the expansion driver is connected with the second depth range finder; the expansion driver is fixed to the other end of the press connecting piece, the multiple stator internal expansion components are fixed to the output end of the expansion driver, and the second depth range finder is fixed to the stator internal expansion components. According to the invention, the position of the stator of the hot jacket can be adjusted on line.

Description

Technical Field

[0001] The invention relates to the field of automobile motor manufacturing, and in particular to a mechanism for online compensating stator shrink sleeve depth. Background Art

[0002] At present, for the new energy electric drive industry, most motors are assembled by stator shrink fitting, and the stator is assembled into the stator housing. The shrink fitting process is: the stator housing is heated, and a gap is formed between the heated stator housing and the stator, so that the stator moves along the axial direction of the stator housing under the action of pressure, so that the stator reaches the required position.

[0003] After the stator is shrink-fitted, the position of the stator is usually tested to determine whether the stator assembly accuracy is qualified. Most stator shrink-fitting tests are to test the relative height difference between the stator and the stator housing. The current process is to perform height difference testing at subsequent stations after shrink-fitting. The above test can only test whether the assembly accuracy of the product is qualified. If it is unqualified, the assembly position of the stator needs to be adjusted.

[0004] When the assembly of the stator and the stator shell flows to the subsequent inspection station, the temperature of the stator shell drops. At this time, the stator shell shrinks due to the temperature drop and holds the stator tightly, so the position of the stator cannot be adjusted at this inspection station. The usual practice is to return the assembly to the heating workshop, heat the stator shell and then adjust the installation position of the stator, which results in complicated processes and increased costs. Summary of the invention

[0005] The invention provides a mechanism for online compensation of stator shrinkage depth, and the invention can adjust the shrinkage position of the stator online.

[0006] The technical solutions to the above problems are as follows:

[0007] A mechanism for online compensation of stator shrink sleeve depth includes a press, a press connector, a first depth ranger, an expansion driver, a stator internal expansion component, and a second depth ranger. The output end of the press is fixed to one end of the press connector, the first depth ranger is multiple and installed at the other end of the press connector, the expansion driver is fixed to the other end of the press connector, the stator internal expansion component is multiple and fixed to the output end of the expansion driver, and the second depth ranger is fixed to the stator internal expansion component.

[0008] Furthermore, the press connecting member includes an intermediate connecting member, a connecting disk, and a radial protrusion. One end of the intermediate connecting member is fixed to the output end of the press, the other end of the intermediate connecting member is fixed to one end of the connecting disk, the tensioning driver is fixed to the other end of the connecting disk, there are multiple radial protrusions and they are arranged on the circumferential surface of the connecting disk, and the first depth rangefinder is installed on the radial protrusion.

[0009] Furthermore, the stator internal expansion component includes a tightening component and a mounting seat, one end of the tightening component is fixed to one end of the mounting seat, the mounting seat is arranged along the radial direction of the tightening driver and is fixed to the tightening driver, the other end of the mounting seat is located outside the circumference of the tightening driver, and the second depth rangefinder is fixed to the other end of the mounting seat.

[0010] Further, after the press presses the stator into a specified position in the stator housing according to a set pressing depth, the press stops feeding, at which time each first depth rangefinder measures the distance between the first depth rangefinder and the axial end surface of the stator housing to obtain a first height value, and the first height values ​​are accumulated and divided by the number of the first height values ​​to obtain a first average value;

[0011] Each second depth rangefinder measures the distance between the second depth rangefinder and the axial end surface of the stator to obtain a second height value, and the second height values ​​are accumulated and divided by the number of the second height values ​​to obtain a second average value;

[0012] The distance between the first depth range finder and the second depth range finder is H, according to the formula:

[0013] H-(first average + second average)

[0014] The relative height difference between the stator and the stator housing is obtained according to the above formula. After the press obtains the height difference, it compares it with the calibration value. If the requirement is not met, the height difference between the stator and the stator housing is compensated.

[0015] Further, after obtaining the first average value, comparing the difference between each first height value and the first average value to see whether it meets the tolerance requirement;

[0016] After obtaining the second average value, the difference between each second height value and the second average value is compared to see whether it meets the tolerance requirement.

[0017] 1. The present invention detects the actual true value of the stator housing and whether the stator housing is laid flat by a first depth rangefinder.

[0018] 2. The present invention detects the actual true value of the stator and whether the stator is clamped and laid flat by a second depth rangefinder.

[0019] 3. The present invention calculates the difference between the measured values ​​and compares them with the calibration values, changes the pressing depth parameters of the press online, and realizes the online compensation function of the product height difference.

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1The present invention is a three-dimensional diagram of a mechanism for online compensation of stator shrink-fit depth.

[0022] Figure 2 The present invention is a cross-sectional view of a mechanism for online compensation of stator shrink-wrap depth.

[0023] Markings in the attached drawings:

[0024] Press 1, press connecting part 2, intermediate connecting part 2a, connecting plate 2b, radial protrusion 2c, first depth ranger 3, stator 5, stator housing 4, stator internal expansion part 6, expansion part 6a, mounting seat 6b, second depth ranger 7, expansion drive 8. DETAILED DESCRIPTION

[0025] like Figure 1 to Figure 2 As shown, a mechanism for online compensation of stator shrink sleeve depth of the present invention includes a press 1, a press connector 2, a first depth ranger 3, an expansion driver 8, a stator internal expansion component 6, and a second depth ranger 7. The output end of the press 1 is fixed to one end of the press connector 2, and the first depth ranger 3 is multiple and installed at the other end of the press connector 2. The press connector 2 includes an intermediate connector 2a, a connecting disk 2b, and a radial protrusion 2c. One end of the intermediate connector 2a is fixed to the output end of the press 1, and the other end of the intermediate connector 2a is fixed to one end of the connecting disk 2b. The expansion driver 8 is fixed to the other end of the connecting disk 2b. The radial protrusion 2c is multiple and is arranged on the circumferential surface of the connecting disk 2b, and the first depth ranger 3 is installed on the radial protrusion 2c.

[0026] The expansion driver 8 is fixed to the other end of the press connector 2. The expansion driver 8 uses a pneumatic clamp or an electric clamp. In the present invention, the expansion driver 8 preferably uses a three-finger pneumatic clamp. There are multiple stator internal expansion components 6 and they are fixed to the output end of the expansion driver 8. The number of stator internal expansion components 6 is 3. The second depth rangefinder 7 is fixed to the stator internal expansion component 6.

[0027] The stator internal expansion component 6 includes a tightening component 6a and a mounting seat 6b. One end of the tightening component 6a is fixed to one end of the mounting seat 6b. The mounting seat 6b is arranged along the radial direction of the tightening driver 8 and is fixed to the tightening driver 8. The other end of the mounting seat 6b is located on the outside of the circumference of the tightening driver 8. The second depth rangefinder 7 is fixed to the other end of the mounting seat 6b.

[0028] The shrinkage process of the stator housing 4 and the stator 5 is as follows: the stator 5 is sleeved on the stator internal expansion component 6, the expansion driver 8 works, and the expansion driver 8 makes the stator internal expansion component 6 move along the radial direction of the stator 5, so that the multiple internal expansion components 6 form a shrinkage effect on the stator 5. The press 1 drives the press connection 2 to move axially, the first depth rangefinder 3 moves with the press connection 2, the press connection 2 drives the expansion driver 8 and the stator internal expansion component 6 to move axially in turn, the second depth rangefinder 7 moves axially with the stator internal expansion component 6, the stator 5 moves axially with the stator internal expansion component 6, and the stator 5 enters the inner hole of the heated stator housing 4. The press 1 continues to feed and presses the stator 5 into the specified position in the stator housing 4 according to the set pressing depth, so that the stator 5 is shrink-fitted in the inner hole of the stator housing 4. The press-in depth is set to be the feed size of the press 1 used according to the model of the stator. The feed size of the press 1 corresponding to each model of the stator is obtained by experimental means before formal press-fitting.

[0029] After the stator 5 is pressed into the specified position in the stator housing 4 according to the set pressing depth, the press 1 stops feeding. At this time, each first depth rangefinder 3 measures the distance between the first depth rangefinder 3 and the axial end face of the stator housing 4 to obtain a first height value, and these first height values ​​are accumulated and divided by the number of first height values ​​to obtain a first average value A0. In the present invention, the number of first depth rangefinders 3 is 3, so there are 3 first height values, which are: first height value one A1, first height value two A2, first height value three A3, and the calculation formula of the first average value A0 is as follows:

[0030]

[0031] After obtaining the first average value A0, the difference between each first height value and the first average value is compared to see whether it meets the tolerance requirement, that is, whether A1-A0 meets the tolerance requirement, whether A2-A0 meets the tolerance requirement, and whether A3-A0 meets the tolerance requirement.

[0032] Each second depth rangefinder 7 measures the distance between the second depth rangefinder 7 and the axial end surface of the stator 5 to obtain a second height value, and the second height values ​​are accumulated and divided by the number of the second height values ​​to obtain a second average value B0. The number of second depth rangefinders 7 is 3, so there are 3 second height values, which are: second height value 1 B1, second height value 2 B2, second height value 3 B3. The calculation formula of the second average value B0 is as follows:

[0033]

[0034] After obtaining the second average value B0, compare whether the difference between each second height value and the second average value meets the tolerance requirement, that is, determine whether B1-B0 meets the tolerance requirement, determine whether B2-B0 meets the tolerance requirement, and determine whether B3-B0 meets the tolerance requirement.

[0035] The distance between the first depth range finder 3 and the second depth range finder 7 is H. H can be obtained according to the installation positions of the first depth range finder 3 and the second depth range finder 7. According to the formula:

[0036] H-(first average value + second average value), that is: H-(A0+B0)

[0037] The height difference between the stator 5 and the stator housing 4 is obtained according to the above formula. After the press 1 obtains the height difference, it compares it with the calibration value. If the requirement is not met, the height difference between the stator 5 and the stator housing 4 is compensated.

[0038] For example, if the calibration value is 1mm and the H value is 1.2mm, the indentation depth needs to be advanced by 0.2mm. If the H value is 0.8mm, the indentation depth needs to be retracted by 0.2mm.

[0039] The above embodiments are part of the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be simply understood as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

Claims

1. A mechanism for online compensation of stator shrinkage depth, comprising a press (1), characterized in that: The invention also comprises a press connecting member (2), a first depth range finder (3), an expansion driver (8), a stator internal expansion component (6), and a second depth range finder (7); the output end of the press (1) is fixed to one end of the press connecting member (2); the first depth range finder (3) is in plurality and is mounted on the other end of the press connecting member (2); the expansion driver (8) is fixed to the other end of the press connecting member (2); the stator internal expansion component (6) is in plurality and is fixed to the output end of the expansion driver (8); and the second depth range finder (7) is fixed to the stator internal expansion component (6).

2. The mechanism for online compensation of stator shrinkage depth according to claim 1 is characterized in that: The press connecting member (2) comprises an intermediate connecting member (2a), a connecting disk (2b), and a radial protrusion (2c); one end of the intermediate connecting member (2a) is fixed to the output end of the press (1); the other end of the intermediate connecting member (2a) is fixed to one end of the connecting disk (2b); the expansion driver (8) is fixed to the other end of the connecting disk (2b); there are a plurality of radial protrusions (2c) arranged on the circumferential surface of the connecting disk (2b); and the first depth rangefinder (3) is mounted on the radial protrusion (2c).

3. The mechanism for online compensation of stator shrinkage depth according to claim 1 is characterized in that: The stator internal expansion component (6) comprises an expansion component (6a) and a mounting seat (6b), one end of the expansion component (6a) is fixed to one end of the mounting seat (6b), the mounting seat (6b) is arranged along the radial direction of the expansion driver (8) and is fixed to the expansion driver (8), the other end of the mounting seat (6b) is located outside the circumference of the expansion driver (8), and the second depth rangefinder (7) is fixed to the other end of the mounting seat (6b).

4. A mechanism for online compensation of stator shrinkage depth according to any one of claims 1 to 3, characterized in that: After the press (1) presses the stator (5) into a specified position in the stator housing (4) according to a set pressing depth, the press (1) stops feeding. At this time, each first depth rangefinder (3) measures the distance between the first depth rangefinder (3) and the axial end surface of the stator housing (4) to obtain a first height value, and the first height values ​​are accumulated and divided by the number of the first height values ​​to obtain a first average value; Each second depth range finder (7) measures the distance between the second depth range finder (7) and the axial end surface of the stator (5) to obtain a second height value, and accumulates the second height values ​​and divides the accumulated values ​​by the number of the second height values ​​to obtain a second average value; The distance between the first depth range finder (3) and the second depth range finder (7) is H, according to the formula: H-(first average + second average) The height difference between the stator (5) and the stator housing (4) is obtained according to the above formula. The press (1) obtains the height difference and compares it with the calibration value. If the requirement is not met, the height difference between the stator (5) and the stator housing (4) is compensated.

5. The mechanism for online compensation of stator shrinkage depth according to claim 4 is characterized in that: After obtaining the first average value, comparing the difference between each first height value and the first average value to see whether it meets the tolerance requirement; After obtaining the second average value, the difference between each second height value and the second average value is compared to see whether it meets the tolerance requirement.

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