Internal support tool for motor casing
By using the two-side tightening method in the motor case tooling, and using the cooperation of the cone sleeve and the mandrel, the problems of poor coaxial accuracy and low production efficiency caused by the single-side tightening are solved, and a high-precision motor is achieved Shell processing avoids secondary clamping, reduces costs and improves the versatility of the device.
Patent Information
- Application Number
- CN202420818321.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-19
AI Technical Summary
The existing motor case tooling adopts a one-side tightening structure, resulting in poor coaxial accuracy at both ends of the inner hole of the cast motor case, low production efficiency, unstable accuracy of workpiece size and shape position tolerance, and secondary clamping is required, resulting in Accuracy error.
Design a motor case inner support tool to adopt both sides tightening method. Through the cooperation of the first cone sleeve and the second cone sleeve with the mandrel, the radial outward expansion and stable insertion of the tightening sleeve assembly is ensured, so as to avoid the two Secondary clamping to improve processing accuracy.
The machining of both ends of the inner hole of the motor case is at the same axis is achieved, the processing accuracy is improved, the secondary clamping is avoided, the force uniformity and coaxial accuracy are ensured, the cost is reduced, and the device structure is simple and repeatable. use.
Smart Images
Figure CN222134212U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of motor production, and in particular relates to an inner support tooling for a motor housing. Background Art
[0002] The motor housing blank is a casting product, which needs to be machined multiple times in the subsequent process to meet the assembly needs. Due to the complex shape of the motor housing, most of them need to install supporting tooling components from the inside. Most of the existing motor housing fixtures use a single-sided tensioning structure, such as the patent "A Motor Housing Processing Tooling" with announcement number CN203751368U and the patent "A Motor Housing Internal Support Fixture" with announcement number CN208214374U. The problem is that the coaxial accuracy of the two ends of the inner hole of the cast motor housing is poor, and the single-sided tensioning positioning affects the processing accuracy. Secondly, the single-sided tensioning method, after the first clamping is completed to process one end of the motor housing, the second clamping is used to process the other end face. The production efficiency is low, and the accuracy of the workpiece size and shape and position tolerances is unstable. Summary of the invention
[0003] In order to overcome the deficiencies in the background technology, the utility model provides an internal support tool for a motor casing. The purpose is to use a two-side tensioning method for motor casing processing to ensure that both ends of the inner hole of the motor casing are processed on the same axis, and to design an internal support tool to avoid secondary clamping and improve processing accuracy.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] A motor housing inner support tool, comprising a tensioning sleeve assembly for inserting into the inner hole of the motor housing; further comprising a first tapered sleeve, a second tapered sleeve and a core shaft; tapered holes are respectively provided at both ends of the tensioning sleeve assembly; the first tapered sleeve and the second tapered sleeve are both provided with outer tapered surfaces corresponding to the tapered holes, which are used to drive the tensioning sleeve assembly to expand radially outward and be embedded in the motor housing when the first tapered sleeve and the second tapered sleeve are respectively approached from the two ends of the tensioning sleeve assembly; the centers of the first tapered sleeve and the second tapered sleeve are respectively provided with a step hole and a threaded hole for being mounted on the shoulder section and the threaded section of the middle part of the core shaft, which are used to drive the first tapered sleeve and the second tapered sleeve to approach each other when the second tapered sleeve rotates on the threaded section; the outer end surface of the second tapered sleeve is provided with a hexagonal head; the two ends of the core shaft respectively extend out of the two end surfaces of the motor housing.
[0006] As a further optimization, the tensioning sleeve assembly includes two tensioning half sleeves; when the two tensioning half sleeves are closed, their appearance is cylindrical, and a gap is left at the joint of the two tensioning half sleeves.
[0007] As a further optimization, a screwing portion is provided at a position of the core shaft outside the end surface of the motor housing.
[0008] As a further optimization, the tension sleeve assembly is made of nylon.
[0009] As a further optimization, a belt groove is provided in the middle of the outer surface of the tension sleeve assembly for fitting an elastic rubber belt.
[0010] Compared with the prior art, the beneficial effects of the utility model are:
[0011] (1) The tension on both sides ensures that the tension sleeve assembly is evenly stressed, and the tension sleeve assembly opens radially at the same time, which is stable and not easy to tilt, and has high precision.
[0012] (2) The same core shaft is used as the installation basis, and the coaxial accuracy of the two taper sleeves is good.
[0013] (3) The mandrel is used as the clamping component of the machine tool to ensure the coaxial accuracy of the machine tool spindle and the motor housing, and secondary clamping can be avoided.
[0014] (4) The device has a simple structure, is easy to manufacture, is reusable, has low cost and good versatility.
[0015] In short, the device adopts the method of tensioning on both sides to ensure that the two ends of the inner hole of the motor housing are on the same axis, avoid secondary clamping, and improve processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the embodiment of the utility model being clamped on a lathe;
[0017] Figure 2 It is a schematic diagram of the explosion structure of an embodiment of the utility model.
[0018] The correspondence between the technical features and the reference numerals in the figure is: motor housing 1; tension sleeve assembly 2; tension half sleeve 21; groove 22; first tapered sleeve 3; step hole 31; second tapered sleeve 4; hexagonal head 41; core shaft 5; screwing portion 51; shoulder section 52; threaded section 53; chuck 6; tailstock 7; tool 8. DETAILED DESCRIPTION
[0019] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the preferred embodiments of the present invention, rather than all the embodiments. It should be understood by those skilled in the art that these implementation methods are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.
[0020] Example 1: Please refer to Figure 1-2 ;
[0021] The utility model provides the following technical solutions: a motor housing inner support tooling, used in the lathe turning process of the cast motor housing 1, including a tension sleeve assembly 2 for inserting into the inner hole of the motor housing 1; also including a first taper sleeve 3, a second taper sleeve 4 and a core shaft 5; the two ends of the tension sleeve assembly 2 are respectively provided with tapered holes; the first taper sleeve 3 and the second taper sleeve 4 are both provided with outer tapered surfaces corresponding to the tapered holes, which are used to drive the tension sleeve assembly 2 to expand radially outward and be embedded in the motor housing 1 when the first taper sleeve 3 and the second taper sleeve 4 are respectively approached from the two ends of the tension sleeve assembly 2; the centers of the first taper sleeve 3 and the second taper sleeve 4 are respectively provided with a step hole 31 and a threaded hole for being fitted onto a shoulder section 52 and a threaded section 53 in the middle of the core shaft 5, which are used to drive the first taper sleeve 3 and the second taper sleeve 4 to approach each other when the second taper sleeve 4 rotates on the threaded section 53; the outer end surface of the second taper sleeve 4 is provided with a hexagonal head 41; the two ends of the core shaft 5 are respectively extended out of the two end surfaces of the motor housing 1.
[0022] The working principle includes that the two taper sleeves are brought together from both ends of the tension sleeve assembly 2, which can be guided in both directions to ensure the coaxiality of the tension sleeve assembly 2. Secondly, the two taper sleeves are installed on the same core shaft 5 to ensure the coaxiality of the two taper sleeves. Therefore, the processing reference of the lathe is the axis of the core shaft 5, which can overcome the problem of poor coaxial accuracy at both ends of the inner hole of the cast motor housing 1, and ensure that the processing references at both ends of the motor housing 1 are the same axis, thereby improving the processing accuracy. Thirdly, during lathe processing, the chuck 6 at one end of the lathe clamps one end of the core shaft 5, and the other end is supported by the lathe tailstock 7. On the one hand, the two ends of the core shaft 5 are supported, and the stability is good; on the other hand, because the two ends of the core shaft 5 extend out of the two end faces of the motor housing 1 respectively, sufficient processing tool 8 positions are reserved at both ends, which is convenient for chamfering, end face cutting and other processing of the motor housing 1. Thereby, secondary clamping can be avoided and precision errors can be reduced.
[0023] The tension sleeve assembly 2 may include multiple movable parts, preferably two, and the tension sleeve assembly 2 includes two tension half sleeves 21; when the two tension half sleeves 21 are embedded in the motor housing 1, their appearance is cylindrical, and a gap is left at the joint of the two tension half sleeves 21. The two tension half sleeves 21 are easy to operate, have a larger bonding area with the motor housing 1, and are firmly fixed.
[0024] In order to facilitate the screwing operation, the core shaft 5 is provided with a screwing portion 51 at a position outside the end surface of the motor housing 1 .
[0025] In order to reduce the wear of the tension sleeve assembly 2 on the inner hole of the motor housing 1, the tension sleeve assembly 2 is made of nylon. Another advantage of the nylon material is that it can reduce weight, reduce the load of the mandrel 5, reduce the deformation of the mandrel 5, and is beneficial to improving processing accuracy.
[0026] For the convenience of carrying, a belt groove 22 is provided in the middle of the outer surface of the tensioning set for fitting an elastic rubber belt. The elastic rubber belt can be bound around the mandrel 5, and on the other hand, the elastic rubber belt is elastic and does not hinder the tensioning set assembly 2 from expanding radially outwards.
[0027] When in use, the first step is to install the tension sleeve assembly 2 and insert the tension sleeve assembly 2 into the inner hole of the motor housing 1. The second step is to assemble the mandrel 5 and put the first cone sleeve 3 onto the shoulder of the mandrel 5; the third step is to insert the other end into the tension sleeve assembly 2 until the conical surface of the first cone sleeve 3 abuts against the conical hole at one end of the tension sleeve assembly 2; the third step is to assemble the second tension sleeve and insert the second tension sleeve from the other end of the mandrel 5 until it reaches the threaded section 53, grasp the hexagonal head 41 and screw the second tension sleeve, drive the first cone sleeve 3 and the second cone sleeve 4 to move closer from the two ends of the tension sleeve assembly 2 respectively, and use the cone surface to drive the tension sleeve assembly 2 to expand radially outward until it is embedded and fixed inside the motor housing 1, completing the assembly of the inner support tooling. The fourth step is lathe clamping. The motor housing 1, the tension sleeve assembly 2, the two taper sleeves and the mandrel 5 are transferred to the lathe as a whole. The chuck 6 of the lathe clamps one end of the mandrel 5, and the other end is supported by the tailstock 7 to complete the clamping. The end faces of the motor housing 1 can be processed from both ends of the motor housing 1 without secondary clamping. After the processing is completed, the second tension sleeve is turned back and the motor housing 1 can be disassembled.
[0028] The advantages of this embodiment are as follows:
[0029] (1) The tension on both sides ensures that the tension sleeve assembly 2 is evenly stressed, and the tension sleeve assembly 2 opens radially at the same time, which is stable and not easy to tilt, and has high precision.
[0030] (2) The same core shaft 5 is used as the installation basis, and the coaxial accuracy of the two taper sleeves is good.
[0031] (3) The core shaft 5 is used as a machine tool clamping component to ensure the coaxial accuracy of the machine tool spindle and the motor housing 1 and avoid secondary clamping.
[0032] (4) The device has a simple structure, is easy to manufacture, is reusable, has low cost and good versatility.
[0033] In short, the device adopts the method of tensioning on both sides to ensure that the two ends of the inner hole of the motor housing 1 are on the same axis, avoids secondary clamping, and improves processing accuracy.
[0034] The parts not described in detail in this utility model are prior art; for ordinary technicians in this field, the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not 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. The scope of this utility model is defined by the attached claims and their equivalents.
Claims
1. A motor housing inner support tool, comprising a tension sleeve assembly (2) for inserting into an inner hole of the motor housing (1); characterized in that: It also comprises a first cone sleeve (3), a second cone sleeve (4) and a core shaft (5); the two ends of the tension sleeve assembly (2) are respectively provided with cone holes; the first cone sleeve (3) and the second cone sleeve (4) are both provided with outer cone surfaces corresponding to the cone holes, so as to drive the tension sleeve assembly (2) to expand radially outwards and be embedded in the motor housing (1) when the first cone sleeve (3) and the second cone sleeve (4) are respectively moved closer from the two ends of the tension sleeve assembly (2); The centers of the first cone sleeve (3) and the second cone sleeve (4) are respectively provided with a stepped hole (31) and a threaded hole for being fitted onto the shoulder section (52) and the threaded section (53) in the middle of the core shaft (5), so as to drive the first cone sleeve (3) and the second cone sleeve (4) to move closer to each other when the second cone sleeve (4) rotates on the threaded section (53); The outer end surface of the second cone sleeve (4) is provided with a hexagonal head (41); and the two ends of the core shaft (5) respectively extend out of the two end surfaces of the motor housing (1).
2. The motor housing inner support tooling according to claim 1, characterized in that: The tension sleeve assembly (2) comprises two tension half sleeves (21); when the two tension half sleeves (21) are closed, their appearance is cylindrical, and a gap is left at the joint of the two tension half sleeves (21).
3. The motor housing inner support tooling according to claim 1, characterized in that: The core shaft (5) is provided with a screwing portion (51) at a position outside the end surface of the motor housing (1).
4. The motor housing inner support tooling according to claim 1, characterized in that: The tension sleeve assembly (2) is made of nylon.
5. The motor housing inner support tooling according to claim 1, characterized in that: A belt groove (22) is provided in the middle of the outer surface of the tension sleeve assembly (2) for fitting an elastic rubber belt.