Stator shell hot jacket positioning tool clamp

Abstract

The utility model belongs to the technical field of motor assembly, and relates to a stator shell hot jacket positioning tool clamp which comprises a base, the base is a stepped shaft, a groove is prefabricated in the horizontal step surface of the stepped shaft, and a stator positioning pin used for being matched with an identification groove in a stator is arranged in the groove; a shell positioning pin used for being matched with a positioning hole in a stator shell is installed on one side of the horizontal step face of the stepped shaft. A locking piece for locking the stator positioning pin is arranged on the outer circular surface of the groove; a positioning piece for finely adjusting the shell positioning pin is arranged on the outer circular surface of the stepped shaft for mounting the shell positioning pin; the positioning piece comprises a guide block, a magnet and a handle, the guide block is perpendicular to the shell positioning pin, the shell positioning pin vertically penetrates through the guide block, the magnet is installed in the guide block, one face of the magnet is in contact adsorption with the shell positioning pin, and the other face of the magnet is in contact adsorption with the inner end of the handle. The problem that when the stator shell is assembled, the position relation between the circumferential direction and the stator is difficult to guarantee is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor assembly, and in particular relates to a stator shell shrink-fit positioning fixture. Background Art

[0002] With the popularization and application of new energy vehicles, the drive motor is the core component of the new energy power system, and the stator and rotor assembly of the motor has received more and more attention. For new energy reducers, a three-in-one structure is now mostly used, that is, the motor, reducer and electronic control are integrated into one. For highly integrated power systems, the stator and rotor of the motor are often integrated through a common housing with the reducer. In order to facilitate the installation and cooling of the stator, it is usually necessary to heat-seal a stator housing on the outside of the stator after assembly. The housing is mainly used for stator limit and stator cooling.

[0003] When the stator is shrunk onto the housing, it is usually necessary to position it in the circumferential direction, such as Figure 1 As shown, the identification groove 4 on the stator 1 must have a position angle requirement with the positioning hole 3 on the stator housing 2. For mass-produced products, automated special equipment is generally used to fix the stator on the base, and the manipulator grabs the heated stator housing, adjusts the position angle through the sensor, and completes the heat sleeve of the stator housing; for new product trial production, due to limited initial investment, it can only rely on positioning fixtures to ensure the position relationship between the housing and the stator circumference. Therefore, during the trial production of new products, it is necessary to design special positioning fixtures to ensure the position relationship between the stator and the stator in the circumferential direction when the stator housing is assembled.

[0004] After searching, the publication number is CN218456381U, and the patent name is an assembly tool and assembly equipment. Based on the distribution of the wire management board and the connector cavity structure on the stator, a base is set, and the base has a first cavity for accommodating the wire management board and the connector cavity. The bottom of the first cavity has a base adapted to the structural distribution of the wire management board and the connector cavity, so as to accurately position and prevent the stator. Secondly, a guide plate is used to ensure that the stator shell is vertically dropped and assembled outside the stator, thereby ensuring the concentricity of the stator and the stator shell during assembly, and improving the success rate of the shrink fitting process.

[0005] The above patent focuses on the success rate of the shell shrink fitting, and ensures the assembly concentricity of the stator shell through tooling design, but it does not ensure that there is a position angle requirement between the identification groove 4 on the stator 1 and the positioning hole 3 on the stator shell 2. Utility Model Content

[0006] The utility model aims to provide a stator shell shrink-fit positioning fixture, which solves the problem that the position relationship between the circumferential direction and the stator is difficult to ensure when the stator shell is assembled.

[0007] The utility model is realized by the following technical solutions:

[0008] A stator housing shrink fit positioning fixture, comprising a base, the base is a stepped shaft, a groove for accommodating a three-phase terminal of a stator is prefabricated on a horizontal step surface of the stepped shaft, a stator positioning pin is arranged in the groove, and the stator positioning pin is used to match with an identification groove on the stator; a housing positioning pin is installed on one side of the horizontal step surface of the stepped shaft, and the housing positioning pin is used to match with a positioning hole on the stator housing;

[0009] A locking piece for locking the stator locating pin is provided on the outer circumferential surface of the groove; a positioning piece for fine-tuning the housing locating pin is provided on the outer circumferential surface of the stepped shaft on which the housing locating pin is installed;

[0010] The positioning member includes a guide block, a magnet and a handle. The guide block is installed vertically with the shell positioning pin. The shell positioning pin vertically passes through the guide block. The magnet is installed in the guide block. One side of the magnet contacts and is adsorbed with the shell positioning pin, and the other side contacts and is adsorbed with the inner end of the handle.

[0011] Furthermore, the locking member adopts a locking screw.

[0012] Furthermore, the stepped shaft includes a first shaft and a second shaft connected in one piece, the first shaft has a larger diameter than the second shaft, and the first shaft is located below the second shaft to form a stepped surface;

[0013] The groove is formed on the first axis.

[0014] Furthermore, a protrusion extending outward is provided on one side of the first shaft, and the housing locating pin is mounted on the protrusion.

[0015] Furthermore, the first shaft is provided with a guide hole for installing the guide block, and a pin hole for penetrating the housing positioning pin, and the pin hole and the guide hole are connected;

[0016] A T-shaped hole consisting of a vertical hole and a horizontal hole is opened in the guide block, a housing positioning pin is installed in the vertical hole and the pin hole, and a magnet and a handle are installed in the horizontal hole.

[0017] Furthermore, the pin hole is divided into an upper hole section and a lower hole section, the diameter of the lower hole section is larger than that of the upper hole section, and the diameter of the upper hole section is larger than that of the vertical hole.

[0018] Furthermore, the stator locating pin includes an insertion section, a supporting section and a positioning section which are connected in sequence from bottom to top. The insertion section is installed on the horizontal step surface of the step shaft. The positioning section is used to pass through the identification groove. The positioning section is an arc flat structure. The identification groove is trapezoidal. The arc edge of the positioning section is tangent to the side edge of the trapezoid.

[0019] Furthermore, the diameter of the supporting section is larger than the diameter of the inserting section, and the diameter of the inserting section is larger than the positioning section.

[0020] Furthermore, the stepped shaft is a hollow shaft.

[0021] Compared with the prior art, the utility model has the following beneficial technical effects:

[0022] The utility model discloses a stator shell shrink-fitting positioning fixture, comprising a base, a groove for accommodating a three-phase terminal of the stator is prefabricated on the base, and a stator positioning pin is arranged in the groove; a shell locating pin is installed on one side of the base, and the shell locating pin is used to match a positioning hole on the stator shell; a positioning piece for fine-tuning the shell locating pin is arranged on the outer circumferential surface of a stepped shaft for installing the shell locating pin, and the positioning piece comprises a guide block, a magnet and a handle. When shrink-fitting, the shell locating pin is raised to the highest position in the guide block, the handle is grasped, and the position of the guide block is adjusted forward and backward to make the shell The locating pin is supported in the locating hole of the stator shell, and then the shell is dropped manually, and the shell locating pin falls with the shell; the stator and stator shell identification grooves and locating holes have errors during processing. In order to ensure that the locating pin is accurately positioned without causing tension or deformation, the stator locating pin can be fine-tuned in the circumferential radial direction by a locking piece to ensure its accurate positioning; the shell locating pin can ensure the accurate positioning of the stator shell by grasping the handle to move the guide block in the radial direction, thus avoiding the problem of inaccurate positioning or locating pin deformation caused by machining errors in parts if the locating pin is fixedly installed.

[0023] This tooling fixture is designed for the first time. On the one hand, it is to achieve the drawing requirements at a low cost. On the other hand, the positions of the locating pins are flexibly adjustable in a small range. If the tooling design is not adjustable and the spatial angle requirements are high, the errors caused by the processing accuracy may cause the two locating pins to become stuck or one may not be aligned with the locating hole after the other, and the two locating reference sizes are relatively small.

[0024] Furthermore, the positioning part of the stator positioning pin is designed as a long flat arc pin, and the stator identification groove is designed as a trapezoid. The positioning part is designed to be a reasonable arc shape that is smaller than the trapezoid of the identification groove, and its arc edge is tangent to the side of the trapezoid, thereby ensuring that the center of the positioning pin coincides with the center line of the identification groove to achieve the positioning purpose. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the circumferential position requirements of the motor stator and housing;

[0026] Figure 2 It is a three-dimensional structural schematic diagram of a stator housing shrink fit positioning fixture of the utility model;

[0027] Figure 3 for Figure 2 A top view of

[0028] Figure 4 for Figure 2 A cross-sectional view of

[0029] Figure 5 The assembly drawing of the stator, stator housing and fixture;

[0030] Figure 6 is a structural schematic diagram of a stator locating pin; a is a three-dimensional diagram of a stator locating pin, and b is a top view of a stator locating pin;

[0031] Among them, 1. stator; 2. stator housing; 3. positioning hole; 4. identification groove; 5. base; 6. stator positioning pin; 7. housing positioning pin; 8. guide block; 9. handle; 10. protrusion; 11. locking screw; 12. magnet; 13. three-phase terminal;

[0032] 51, first axis; 52, second axis;

[0033] 61. Insertion section; 62. Support section; 63. Positioning section. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model clearer, the following is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model, that is, the embodiments described are only part of the embodiments of the utility model, not all of the embodiments.

[0035] The components described and shown in the drawings and embodiments of the present invention can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present invention provided in the following drawings is not intended to limit the scope of the claimed invention, but merely represents a selected embodiment of the present invention. Based on the drawings and 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.

[0036] It should be noted that the terms "comprises", "includes" or any other variants are intended to cover non-exclusive inclusion, so that a process, element, method, article or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to the process, element, method, article or device. In addition, the terms "horizontal" and "vertical" are based on the orientation and positional relationship of the devices or components shown in the drawings, and are only for the purpose of better describing the utility model, rather than requiring the devices, components or equipment shown to have this specific orientation, and therefore cannot be understood as limitations on the utility model.

[0037] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0038] like Figure 2-Figure 5As shown, the purpose of the utility model is to provide a stator housing shrink fit positioning fixture, including a base 5, the base 5 is a hollow stepped shaft, a groove for accommodating a three-phase terminal 13 is prefabricated on the horizontal step surface of the stepped shaft, a stator positioning pin 6 is arranged in the groove, and a housing positioning pin 7 is installed on one side of the horizontal step surface of the stepped shaft. A pin hole for installing the housing positioning pin 7 is prefabricated on the stator housing 2, a stator 1 identification groove 4 is prefabricated on the stator 1, the stator positioning pin 6 is used to match the identification groove 4 on the stator 1, and the housing positioning pin 7 is used to match the positioning hole 3 on the stator housing 2.

[0039] Specifically, Figure 2 and Figure 4 As shown, the hollow stepped shaft includes a first shaft 51 and a second shaft 52. The diameter of the first shaft 51 is larger than that of the second shaft 52, and the first shaft 51 is located at the lower side of the second shaft 52. There is a protrusion 10 extending outward on one side of the horizontal step surface of the stepped shaft, and a shell locating pin 7 is installed on the protrusion 10.

[0040] The present application uses the protrusion 10 as an optimized structure in consideration of cost. The outer diameter of the first shaft 51 is made smaller, as long as it is ensured that the stopper of the stator housing 2 can fit with the end face of the stator 1 after the stator housing 2 falls.

[0041] Of course, the protrusion 10 may not be provided, and it is only necessary to enlarge the outer diameter of the first shaft 51 to correspond to the outer diameter of the stator housing 2 to ensure that the housing locating pin 7 has an installation position.

[0042] like Figure 6 a and Figure 6 As shown in b, the stator locating pin 6 includes an insertion section 61, a support section 62 and a positioning section 63 connected in sequence from bottom to top, the insertion section 61 is installed on the horizontal step surface of the step shaft, the positioning section 63 is used to pass through the identification groove 4, the positioning section 63 is an arc flat structure, the identification groove 4 is a trapezoid, and the arc edge of the positioning section 63 is tangent to the side of the trapezoid.

[0043] Furthermore, the diameter of the supporting section 62 is greater than the diameter of the inserting section 61 , and the diameter of the inserting section 61 is greater than the diameter of the positioning section 63 .

[0044] like Figure 6 As shown in b, the positioning part of the stator positioning pin 6 is a long flat arc pin, and the stator 1 identification groove 4 is a trapezoid. The positioning part is designed to be a reasonable arc shape that is smaller than the trapezoid of the identification groove 4, and its arc edge is tangent to the side of the trapezoid, thereby ensuring that the center of the positioning pin coincides with the center line of the identification groove 4 to achieve the positioning purpose.

[0045] The stepped shaft is designed to be hollow because a solid shaft is too heavy, which increases the burden on workers when carrying it in the workshop.

[0046] like Figure 4As shown, a locking piece for locking the stator locating pin 6 is provided on the outer circumferential surface of the groove, and a locating piece for fine-tuning the shell locating pin 7 is provided on the outer circumferential surface of the stepped shaft for installing the shell locating pin 7; the locating piece includes a guide block 8, a magnet 12 and a handle 9, the guide block 8 is vertically installed with the shell locating pin 7, the shell locating pin 7 vertically passes through the guide block 8, the magnet 12 is installed in the guide block 8, one side of the magnet 12 is in contact with the shell locating pin 7 for adsorption, and the other side is in contact with the inner end of the handle 9 for adsorption.

[0047] When the stator housing 2 is shrink-fitted onto the stator 1, it needs to be continuously dropped until the stop of the stator housing 2 contacts and fits with the end face of the stator 1, that is, it is installed in place. Therefore, the housing locating pin 7 is in the guide block 8 and can move up and down in the hole of the guide block 8 through the attraction force provided by the magnet 12. Before the stator housing 2 is ready to contact the stator 1 for shrink-fitting, the housing locating pin 7 rises to the highest position to position and support the stator housing 2. Then the stator housing 2 falls. Due to the attraction force of the magnet 12, the housing locating pin 7 can fall stably in the hole of the guide block 8 and continuously support and position the stator housing 2 without falling off.

[0048] The utility model designs a special base 5, such as the attached Figure 2 To support the stator 1, the copper wire of the stator 1 contacts the groove of the base 5, and the central cylinder of the base 5 faces the center of the stator 1. The concave space designed in the base 5 is used to avoid interference with the three-phase line terminals and temperature sensors on the stator 1, so that the stator 1 is stably and reliably supported on the base 5 without shaking.

[0049] like Figure 1 As shown, the identification slot 4 of the stator 1 is a small trapezoid. Before ensuring the circumferential angle between the stator 1 and the stator housing 2, the stator 1 needs to be positioned with the identification slot 4 as a reference. Figure 1 The identification groove 4 shown in the figure is a small-sized trapezoid. After the stator housing 2 and the stator 1 are assembled, the positioning tool needs to be pulled out. Finally, a stator positioning pin 6 is designed to realize the positioning of the stator 1. The positioning part of the stator positioning pin 6 is a long flat arc pin, such as Figure 6 As shown, through two-dimensional dimension fitting, the positioning part of the stator positioning pin 6 is designed to be a reasonable arc shape that is smaller than the trapezoid of the identification groove 4, and its arc edge is tangent to the side of the trapezoid, thereby ensuring that the center of the positioning pin coincides with the center line of the identification groove 4 to achieve the positioning purpose.

[0050] There is a positioning hole 3 on the stator housing 2. The positioning of the stator housing 2 is also ensured by designing a housing positioning pin 7. Then the stator positioning pin 6 and the housing positioning pin 7 are fixed to the base 5. The tooling is designed so that the center line angle between the stator positioning pin 6 and the housing positioning pin 7 meets the positioning angle requirement of the stator 1 and the stator housing 2. Figure 3 , thereby finally achieving the thermal installation position requirements of the stator housing 2.

[0051] There are errors in the identification groove 4 and the positioning hole 3 of the stator 1 and the stator housing 2 during processing. In order to ensure that the positioning pin is accurately positioned without causing tension or deformation, the stator positioning pin 6 can be fine-tuned in the circumferential radial direction by the locking screw 11 to ensure its accurate positioning; the housing positioning pin 7 can ensure the accurate positioning of the stator housing 2 by grasping the handle 9 to move the guide block 8 in the radial direction, thus avoiding the problem of inaccurate positioning or positioning pin deformation caused by processing errors in the parts if the positioning pin is fixedly installed.

[0052] In the trial production stage of new products, the stator 1 and the stator housing 2 are positioned and installed in the circumferential direction by the low-cost fixture designed by the utility model. Figure 5 The fixture has a simple structure, is easy to operate, and can meet the requirements of the design drawings, providing a technical solution for the assembly needs of similar products in the future.

[0053] The specific implementation steps of the fixture are as follows:

[0054] Put the stator 1 on the base 5, that is, sleeve the stator 1 on the outer circumferential surface of the second shaft 52, and align the stator locating pin 6 with the stator 1 identification groove 4 by adjusting the locking screw 11, place the three-phase terminal 13 of the stator 1 and the temperature sensor in the concave surface of the base 5, and the hairpin copper wire of the stator 1 is completely attached to the support surface of the base 5;

[0055] Pick up the heated stator housing 2, raise the housing locating pin 7 to the highest position in the guide block 8, grab the handle 9, adjust the position of the guide block 8 forward and backward, so that the housing locating pin 7 is supported in the locating hole 3 of the stator housing 2, and then manually drop the housing, and the housing locating pin 7 falls with the housing;

[0056] The stator housing 2 is installed in place when the housing stop is lowered to fit the end surface of the stator 1 , and then after the stator housing 2 is cooled, the stator 1 with the housing assembly is lifted and taken out from the base 5 , thereby completing the assembly of the stator housing 2 .

[0057] While ensuring that the stator 1 shell is concentric with the stator 1, the fixture also needs to solve the technical problem that the circumferential position of the stator 1 shell and the stator 1 body meets the requirements of the drawing after the stator 1 shell and the stator 1 body are assembled. That is, the stator 1 shell must be fixed in position during the falling process, and before the stator 1 shell is shrink-fitted on the stator 1 body, the fixture must ensure that the circumferential position of the stator shell 2 and the stator 1 meets the requirements of the drawing.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the utility model should be included in the scope of protection of the claims of the utility model.

Claims

1. A stator housing shrink fit positioning fixture, characterized in that: The invention comprises a base (5), wherein the base (5) is a stepped shaft, and a groove for accommodating a three-phase terminal (13) of a stator (1) is prefabricated on a horizontal step surface of the stepped shaft, wherein a stator positioning pin (6) is arranged in the groove, and the stator positioning pin (6) is used to match with an identification groove (4) on the stator (1); a housing positioning pin (7) is installed on one side of the horizontal step surface of the stepped shaft, and the housing positioning pin (7) is used to match with a positioning hole (3) on a stator housing (2); A locking piece for locking the stator positioning pin (6) is provided on the outer circumferential surface of the groove; and a positioning piece for fine-tuning the housing positioning pin (7) is provided on the outer circumferential surface of the stepped shaft on which the housing positioning pin (7) is installed. The positioning member comprises a guide block (8), a magnet (12) and a handle (9); the guide block (8) is vertically mounted on a housing positioning pin (7); the housing positioning pin (7) vertically penetrates the guide block (8); the magnet (12) is mounted in the guide block (8); one side of the magnet (12) is in contact with and adsorbed on the housing positioning pin (7); and the other side of the magnet (12) is in contact with and adsorbed on the inner end of the handle (9).

2. A stator housing shrink fit positioning fixture according to claim 1, characterized in that: The locking member adopts a locking screw (11).

3. The stator housing shrink fit positioning fixture according to claim 1, characterized in that: The stepped shaft comprises a first shaft (51) and a second shaft (52) which are connected in one piece, the diameter of the first shaft (51) is larger than that of the second shaft (52), and the first shaft (51) is located below the second shaft (52) to form a stepped surface; The groove is formed on the first shaft (51).

4. A stator housing shrink fit positioning fixture according to claim 3, characterized in that: A protrusion (10) extending outward is provided on one side of the first shaft (51), and a housing positioning pin (7) is mounted on the protrusion (10).

5. The stator housing shrink fit positioning fixture according to claim 3, characterized in that: The first shaft (51) is provided with a guide hole for installing a guide block (8) and a pin hole for penetrating a positioning pin (7) of the housing, and the pin hole and the guide hole are connected; A T-shaped hole consisting of a vertical hole and a horizontal hole is formed in the guide block (8), a housing positioning pin (7) is installed in the vertical hole and the pin hole, and a magnet (12) and a handle (9) are installed in the horizontal hole.

6. A stator housing shrink fit positioning fixture according to claim 5, characterized in that: The pin hole is divided into an upper hole section and a lower hole section, the diameter of the lower hole section is larger than the upper hole section, and the diameter of the upper hole section is larger than the diameter of the vertical hole.

7. The stator housing shrink fit positioning fixture according to claim 1, characterized in that: The stator positioning pin (6) comprises an insertion section (61), a support section (62) and a positioning section (63) which are connected in sequence from bottom to top. The insertion section (61) is installed on the horizontal step surface of the stepped shaft. The positioning section (63) is used to penetrate the identification groove (4). The positioning section (63) is an arc flat structure. The identification groove (4) is trapezoidal. The arc edge of the positioning section (63) is tangent to the side edge of the trapezoid.

8. The stator housing shrink fit positioning fixture according to claim 7, characterized in that: The diameter of the supporting section (62) is larger than the diameter of the inserting section (61), and the diameter of the inserting section (61) is larger than the diameter of the positioning section (63).

9. The stator housing shrink fit positioning fixture according to claim 1, characterized in that: The stepped shaft is a hollow shaft.

Images