High-speed motor shell machining fixing tool

Abstract

The utility model provides a high-speed motor shell machining fixing tool which comprises a fixing outer cylinder of a cylindrical structure, and the middle of the fixing outer cylinder is of a hollow structure. The four base plates are arranged in the fixed outer cylinder and are close to the inner walls in the upper, lower, left and right directions in the fixed outer cylinder to form a square clamping space so as to fix the approximately square motor shell; a row of longitudinally-arranged screw holes are formed in the positions, corresponding to the installation positions of the base plates, of the fixed outer cylinder, and locking screws penetrate through the screw holes and abut against the adjacent base plates. According to the high-speed motor shell machining fixing tool, a motor shell assembly can be fixed, so that the inner wall and the two end faces of a motor shell can be machined through a machine tool, secondary clamping is not needed in the machining process, and the machining precision requirement can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of precision machining, in particular to a high-speed motor housing machining fixing tool. Background Art

[0002] like Figure 1-3 As shown, the main function of the high-speed motor housing is to fix the motor stator and dissipate heat from the stator, so the motor housing 1 is mainly composed of a combined structure of two parts: an inner lining steel sleeve 11 and an outer heat dissipation sleeve 12. The inner lining steel sleeve 11 is mainly used to install the motor stator, and the outer heat dissipation sleeve 12 is mainly used to fix the steel sleeve and conduct the stator heat transferred from the steel sleeve 11. Two sets of symmetrically arranged heat dissipation structures are arranged on the outside of the heat dissipation sleeve 12, and the heat dissipation sleeve and the steel sleeve are connected together in a tight fit, thereby forming a firm and inseparable housing structure. Since the steel sleeve and the heat sink are assembled in a tight fit, the inner surface of the steel sleeve will be unevenly deformed and have residual stress. After assembly, the inner wall of the steel sleeve and the two end faces of the outer shell need to be fine-machined. The precision of the inner wall is required to be less than 0.01mm, and the parallelism of the two end faces of the outer shell is also required to be less than 0.01mm. At this time, the outer shell structure is no longer a cylindrical structure due to the heat dissipation structure design outside the heat sink. At this time, the inner wall and the two end faces of the outer shell face great process difficulties. In other words, the inner wall and the two end faces except the outer surface need to be fine-machined, and the only outer surface that can be determined is not a regular surface (i.e., a cylindrical surface). If conventional fixtures are used, more than two sets of fixtures are required for repeated fixation, and after a reference surface is processed, it needs to be re-fixed before the next step of fine machining. Not only does the processing technology become complicated and the processing time increases significantly, but the processing quality requirements (the accuracy of the inner wall is required to be less than 0.01mm, and the parallelism of the two end surfaces of the shell is also required to be less than 0.01mm) cannot be guaranteed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a high-speed motor housing processing fixing tool to solve the fixing problem of the combined structure high-speed motor housing during fine processing.

[0004] In order to solve the above technical problems, the utility model provides a high-speed motor housing processing and fixing tool, including:

[0005] The fixed outer cylinder is a cylindrical structure with a hollow structure in the middle;

[0006] Four pads are arranged inside the fixed outer cylinder and close to the inner walls of the fixed outer cylinder in four directions of up, down, left and right to form a square clamping space to fix the motor housing which is roughly square;

[0007] Wherein, a row of longitudinally arranged screw holes is provided on the fixed outer cylinder corresponding to the installation position of each pad, and a locking screw passes through the screw hole and abuts against the pad adjacent to it.

[0008] The upper and lower surfaces of the pad are planes, and the two side edges are arc surfaces. When the pad is installed in the fixed outer cylinder, the arc surface fits with the inner wall of the fixed outer cylinder.

[0009] The locking screws are arranged in a row and are centrally disposed in the longitudinal direction of the backing plate.

[0010] Three locking screws are arranged in each row, wherein one locking screw is arranged at each of the two ends and the middle.

[0011] The locking screws are arranged in double rows and are symmetrically arranged relative to the longitudinal center line of the backing plate.

[0012] The length of the pad is smaller than the length of the fixed outer cylinder, and both ends of the pad are located in the fixed outer cylinder.

[0013] The high-speed motor housing processing and fixing tool provided by the utility model can fix the motor housing assembly, so that the machine tool can process the inner wall and both end faces of the motor housing, and in the processing process, no secondary clamping is required, so that the processing accuracy requirements can be guaranteed. When the high-speed motor housing processing and fixing tool provided by the utility model is used, the motor housing is first loaded into the fixed outer cylinder, and then the pad is adjusted by the locking screw so that the pad tightly fixes the motor housing; then one end of the fixed outer cylinder is clamped on the rotating shaft of the machine tool so that the fixed outer cylinder is coaxial with the rotating shaft, and the other end of the fixed outer cylinder is fed into the tool, so as to achieve fine processing of the inner wall and both end faces of the fixed outer cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the motor housing.

[0015] Figure 2 This is a schematic diagram of the end structure of the motor housing.

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the motor housing.

[0017] Figure 4 It is a schematic diagram of the structure of the high-speed motor housing processing and fixing tooling according to an embodiment of the utility model.

[0018] Figure 5 It is a schematic cross-sectional structure diagram of the high-speed motor housing processing and fixing tooling according to an embodiment of the utility model.

[0019] Figure 6It is a schematic cross-sectional structure diagram of the high-speed motor housing processing and fixing tooling according to an embodiment of the utility model.

[0020] Figure 7 It is a schematic cross-sectional structure diagram of the high-speed motor housing processing and fixing tooling according to an embodiment of the utility model.

[0021] Figure 8 This is a schematic diagram of the structure of the high-speed motor housing processing and fixing tooling in use according to an embodiment of the utility model.

[0022] Fig. 9 This is a schematic diagram of the structure of the high-speed motor housing processing and fixing tooling in use according to an embodiment of the utility model.

[0023] In the figure:

[0024] 1-motor housing; 11-steel sleeve; 12-heat dissipation sleeve; A0-inner wall of steel sleeve; A1-end face of housing; A2-end face of housing;

[0025] 2-fixing tool; 21-fixing outer cylinder; 22-backing plate; 23-locking screw. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] Combination Figure 1-3The motor housing 1 provided includes an internal steel sleeve 11 and a heat dissipation sleeve 12 tightly connected to the outside of the steel sleeve 11. The steel sleeve 11 is a cylindrical structure, and the main body of the heat dissipation sleeve 12 adopts a square structure. Heat dissipation fins are respectively arranged on the four surfaces. The steel sleeve 11 and the heat dissipation sleeve 12 are connected together by interference fit after rough processing so that the two are fixed. Since the tight fit may cause deformation of the steel sleeve 11, in order to ensure the roundness of the inner wall of the steel sleeve, the inner wall of the steel sleeve needs to be fine-machined. After the inner wall is finely machined, the two end faces of the motor housing 1 must also be processed to ensure the parallelism requirements of the two end faces.

[0030] Further integration Figure 4-7 The high-speed motor housing processing fixture 2 shown includes:

[0031] The fixed outer cylinder 21 is a cylindrical structure with a hollow structure in the middle; the outer portion of the fixed outer cylinder 21 is used to be fixedly clamped on the main shaft of the machine tool, and the hollow structure of the fixed outer cylinder 21 is used to accommodate the motor housing 1 and coaxially fix the motor housing 1 in the fixed outer cylinder 21

[0032] Four pads 22 are arranged inside the fixed outer cylinder 21 and close to the inner walls of the fixed outer cylinder 21 in four directions of up, down, left, and right to form a square clamping space to fix the motor housing which is roughly square; the four pads 22 can support and fix the motor housing from four directions, so that the motor housing and the fixed outer cylinder 21 are coaxially arranged;

[0033] Among them, on the fixed outer cylinder 21, corresponding to the installation position of each pad 22, a row of longitudinally arranged screw holes is provided, and the locking screws 23 pass through the screw holes and abut against the pads 22 adjacent to them; the locking screws 23 can pass through the wall of the fixed outer cylinder 21 and press against the pads 22, so that the point support force of the locking screws 23 is converted into the surface support of the pads 22 to the motor housing, effectively reducing the stress concentration deformation of the motor housing caused by the support and fixing process, so that the four surfaces of the motor housing are subjected to equal force, and after the processing of the motor housing is completed, the motor will no longer be deformed.

[0034] The upper and lower surfaces of the pad 22 are planes, and the two side edges are arc surfaces, and when the pad 22 is installed in the fixed outer cylinder, the arc surface fits the inner wall of the fixed outer cylinder 21. The lower surface of the pad 22 (the surface close to the motor housing) can also be a curved surface or an irregular surface, the purpose of which is to adapt to the surface structure of the motor housing. The lower surface of the pad can also be set as a U-shaped groove, so as to clamp the surface of the motor housing, so that the fins on the motor housing are adapted to the U-shaped groove.

[0035] The locking screws 23 are arranged in a row and are centrally disposed in the longitudinal direction of the backing plate 22 .

[0036] like Figure 7 As shown, three locking screws 23 are arranged in each row, wherein one locking screw is arranged at each end and in the middle (such as Figure 5 shown).

[0037] The locking screws 23 are arranged in double rows, symmetrically with respect to the longitudinal center line of the backing plate. Figure 6 As shown, a single surface of the motor housing can be supported at multiple points (non-linear arrangement), so that the motor housing is less deformed during rotation.

[0038] Combination Figure 8-9 As shown, the length of the pad 22 is smaller than the length of the fixed outer cylinder 21, and both ends of the pad are located inside the fixed outer cylinder 21. At the same time, the length of the motor housing is required to be greater than the length of the pad 22 but smaller than the length of the fixed outer cylinder 21. The purpose of this arrangement is to facilitate the tool to process the two end faces of the motor structure.

[0039] The high-speed motor housing processing and fixing tool provided by the utility model can fix the motor housing assembly, so that the machine tool can process the inner wall and both end faces of the motor housing, and in the processing process, no secondary clamping is required, so that the processing accuracy requirements can be guaranteed. When the high-speed motor housing processing and fixing tool provided by the utility model is used, the motor housing is first loaded into the fixed outer cylinder, and then the pad is adjusted by the locking screw so that the pad tightly fixes the motor housing; then one end of the fixed outer cylinder is clamped on the rotating shaft of the machine tool so that the fixed outer cylinder is coaxial with the rotating shaft, and the other end of the fixed outer cylinder is fed into the tool, so as to achieve fine processing of the inner wall and both end faces of the fixed outer cylinder.

[0040] 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.

[0041] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. High-speed motor housing processing fixed tooling, characterized in that: include: The fixed outer cylinder is a cylindrical structure with a hollow structure in the middle; Four pads are arranged inside the fixed outer cylinder and close to the inner walls of the fixed outer cylinder in four directions of up, down, left and right to form a square clamping space to fix the motor housing which is roughly square; Wherein, a row of longitudinally arranged screw holes is provided on the fixed outer cylinder corresponding to the installation position of each pad, and a locking screw passes through the screw hole and abuts against the pad adjacent to it.

2. The high-speed motor housing processing and fixing tool according to claim 1 is characterized in that: The upper and lower surfaces of the pad are planes, and the two side edges are arc surfaces. When the pad is installed in the fixed outer cylinder, the arc surface fits with the inner wall of the fixed outer cylinder.

3. The high-speed motor housing processing and fixing tool according to claim 1 is characterized in that: The locking screws are arranged in a row and are centrally disposed in the longitudinal direction of the backing plate.

4. The high-speed motor housing processing and fixing tool according to claim 1 is characterized in that: Three locking screws are arranged in each row, wherein one locking screw is arranged at each of the two ends and the middle.

5. The high-speed motor housing processing and fixing tool according to claim 1 is characterized in that: The locking screws are arranged in double rows and are symmetrically arranged relative to the longitudinal center line of the backing plate.

6. The high-speed motor housing processing and fixing tool according to claim 1 is characterized in that: The length of the pad is smaller than the length of the fixed outer cylinder, and both ends of the pad are located in the fixed outer cylinder.

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