Precise double-conical-surface expansion core lathe fixture
By designing a precision double-cone expansion core lathe fixture, one-time clamping processing of both ends of the motor casing is achieved, solving the problem of secondary clamping error in the existing technology and improving the processing accuracy and stability of the motor.
Patent Information
- Application Number
- CN202422975585.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-12-04
AI Technical Summary
In the prior art, both ends of the motor housing need to be processed twice, and the secondary clamping is prone to errors, resulting in low machining accuracy, unable to meet high-precision requirements, and affecting motor performance.
A precision double-cone expansion core lathe fixture is designed, which includes a center shaft, a fixed cone sleeve, a spring cone sleeve and an adjustment mechanism. The adjustment mechanism drives the spring cone sleeve to move axially along the center shaft to achieve radial expansion or contraction of the cylindrical structural part, realizing one-time clamping processing.
The motor housing can be processed at both ends simultaneously, eliminating errors, ensuring high precision, improving motor quality and stability, simplifying processing operations, and increasing motor qualification rate.
Smart Images
Figure CN223430969U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to large and medium-sized motor casing processing technical field, and concretely relates to a precision double-tapered surface expanding core lathe fixture. BACKGROUND
[0002] Motor main parts are mostly rotary parts, and the machining process is generally turning, and the design of each process in the turning process determines the part precision. Especially the casing, the casing mainly serves as a support workpiece in the motor system, and the machining precision of the casing directly determines the relative position precision of other motor parts and whether the mutual cooperation between the parts meets the requirements.
[0003] The casing is a cylindrical workpiece, and the precision of the inner hole and the two end faces in the casing is mainly positioned in the motor system, and the quality of the casing is mainly determined by the machining precision of the inner hole and the two end faces and the perpendicularity precision between the inner hole and the end faces. The size precision, roundness and surface roughness of the casing inner hole can meet the requirements through conventional turning, but the two end faces need to be machined once and then clamped again to machine the other end face. In this way, only the inner hole and the one end face can be machined once, and the second end face must be clamped twice. When the precision of a part of the motor and the casing is not high, although the error is produced by clamping twice, the design requirements can still be met. However, the second machining cannot meet the design requirements for a part of the precision motor casing, and the casing machining cannot meet the design requirements, which may cause the bearing friction to increase, the rotor to rotate poorly and the motor to vibrate, and finally cause the motor to be damaged.
[0004] Therefore, a fixture capable of machining the two ends of the casing at the same time is needed. UTILITY MODEL CONTENTS
[0005] The main purpose of the utility model is to provide a precision double-tapered surface expanding core lathe fixture, so as to at least solve the problem that the two ends of the motor casing are machined twice in the prior art, and the error is easily produced by clamping twice, resulting in low machining precision of the casing.
[0006] In order to achieve the above-mentioned objectives, the utility model provides a precision double-cone expansion core lathe fixture, comprising a center shaft, two fixed cone sleeves, two spring cone sleeves and two adjusting mechanisms; the center shaft is fixed on the lathe at both ends; the two fixed cone sleeves are symmetrically fixed to the center shaft; the outer surface of the fixed cone sleeve along the axial direction of the center shaft is a cone surface, and the outer surface of the fixed cone sleeve gradually increases in diameter along the direction from the end of the center shaft to the center of the center shaft; the inner surface of each spring cone sleeve is slidably sleeved on the outer surface of the fixed cone sleeve respectively, and the outer surface of the spring cone sleeve is used to sleeve the cylindrical structural part to be processed; two adjusting mechanisms are sleeved on the center shaft and located on the outside of the two spring cone sleeves, and each adjusting mechanism is connected to one spring cone sleeve respectively; the adjusting mechanism is used to drive the corresponding spring cone sleeve to move back and forth relative to the fixed cone sleeve along the axial direction of the center shaft so that the spring cone sleeve is radially expanded or contracted under the action of the outer surface of the fixed cone sleeve to tighten or loosen the cylindrical structural part.
[0007] Optionally, a center hole is provided at the center of each of the two end faces of the central shaft; wherein the center holes at both ends are respectively used to cooperate with two centers on a lathe to fix the lathe fixture.
[0008] Optionally, the adjusting mechanism includes a threaded sleeve and a connecting plate; the threaded sleeve is rotatably mounted on the outer surface of the central shaft by an external force, and the inner surface of the first end of the threaded sleeve is provided with an internal thread; the connecting plate is slidably mounted on the outer surface of the central shaft along the axial direction, and is located between the threaded sleeve and the spring cone sleeve; the outer surface of the first end of the connecting plate is provided with an external thread, and the external thread cooperates with the internal thread; the second end of the connecting plate is connected to the spring cone sleeve; wherein, when the threaded sleeve rotates, the internal thread cooperates with the external thread, driving the spring cone sleeve to move back and forth along the axial direction of the central shaft.
[0009] Optionally, the outer surface of the central shaft is provided with two annular grooves along the circumferential direction, the inner surface of the second end of each threaded sleeve is provided with a pin hole, and the adjustment mechanism further includes a pin, which is installed between one of the annular grooves and one of the pin holes to limit the axial position of the corresponding threaded sleeve.
[0010] Optionally, the adjustment mechanism further includes a plurality of screws, which are evenly spaced along the circumference of the connecting plate to fix the connecting plate to the corresponding spring cone sleeve.
[0011] The utility model discloses a kind of precision double-tapered surface expanding core lathe clamps, including center shaft, two fixed cone sleeves, two spring cone sleeves and two adjusting mechanisms;Center shaft is fixed on lathe at both ends;Two fixed cone sleeves are fixed symmetrically on center shaft;The outer surface of fixed cone sleeve is tapered along the axial direction of center shaft, and the diameter of the outer surface of fixed cone sleeve gradually increases along the direction from the end of center shaft to the center of center shaft;The inner surface of each spring cone sleeve is respectively slidably sleeved on the outer surface of fixed cone sleeve, and the outer surface of spring cone sleeve is used to sleeve the cylindrical structural member to be processed;Two adjusting mechanisms are sleeved on center shaft and located on the outer side of two spring cone sleeves, and each adjusting mechanism is respectively connected with a spring cone sleeve;Adjusting mechanism is used to drive corresponding spring cone sleeve to reciprocate along the axial direction of center shaft relative to fixed cone sleeve, so that spring cone sleeve is expanded or contracted along radial direction under the action of the outer surface of fixed cone sleeve, so as to clamp or loosen the cylindrical structural member. Thus, when processing the cylindrical shell, the high precision of the shell is ensured without turning back twice, which meets the design requirements, thereby eliminating various hidden troubles caused by poor shell precision, ensuring the quality of motor, enhancing the stability of motor, improving the pass rate of motor, and the whole processing operation process is simple and easy to operate without alignment. BRIEF DESCRIPTION OF DRAWINGS
[0012] The drawings accompanying the specification illustrate preferred embodiments of the utility model and serve to explain the utility model. The utility model is not limited by the preferred embodiments described in the specification. In the drawings:
[0013] Figure 1 is a whole view of a precision double-tapered surface expanding core lathe clamp according to an embodiment of the utility model;
[0014] Figure 2 is a first precision double-tapered surface expanding core lathe clamp part drawing according to an embodiment of the utility model;
[0015] Figure 3 is a second precision double-tapered surface expanding core lathe clamp part drawing according to an embodiment of the utility model;
[0016] Figure 4 is a precision double-tapered surface expanding core lathe clamp and cylindrical structural member cooperation schematic view according to an embodiment of the utility model.
[0017] In the above drawings, the following reference signs are used:
[0018] 10, center shaft; 20, fixed cone sleeve; 30, spring cone sleeve; 40, adjusting mechanism; 41, threaded sleeve; 42, connecting plate; 43, pin; 44, screw; 50, motor shell. DETAILED DESCRIPTION
[0019] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.
[0020] As Figure 1 shown in one kind of precise double taper core lathe fixture, including center shaft 10, two fixed cone sleeve 20, two spring cone sleeve 30 and two adjusting mechanism 40;Center shaft 10 both ends are fixed on lathe;Two fixed cone sleeve 20 is fixed on center shaft 10 symmetrically;Fixed cone sleeve 20 along the outer surface of center shaft 10 axial is taper, the outer surface of fixed cone sleeve 20 gradually increases in diameter along the direction from the end of center shaft 10 to the center of center shaft 10;The inner surface of each spring cone sleeve 30 is respectively correspondingly slidably sleeved on the outer surface of fixed cone sleeve 20, and the outer surface of spring cone sleeve 30 is used for sleeving the cylindrical structure to be processed;Two adjusting mechanism 40, sleeve in center shaft 10 and located at the outer side of two spring cone sleeve 30, each adjusting mechanism 40 is respectively connected with a spring cone sleeve 30;Adjusting mechanism 40 is used for driving corresponding spring cone sleeve 30 to reciprocate along the axial direction of center shaft 10 relative to fixed cone sleeve 20 to make spring cone sleeve 30 expand or contract in radial direction under the action of the outer surface of fixed cone sleeve 20 to make the cylindrical structure tight or loose.
[0021] Specifically, the center shaft 10 is the support component of the whole fixture. The two fixed cone sleeves 20 are symmetrically fixed on the center shaft 10, and the outer surface of the fixed cone sleeve 20 presents a taper shape. From one end of the center shaft 10 to the center, the diameter of the fixed cone sleeve 20 gradually increases. The inner surface of each spring cone sleeve 30 matches the outer surface of one fixed cone sleeve 20 and can reciprocate along the fixed cone sleeve 20 in the axial direction of the center shaft 10. The spring cone sleeve 30 can elastically deform under the action of force. When the spring cone sleeve 30 is driven to move in the axial direction of the center shaft 10, it will expand or contract in the radial direction due to the tapered design of the fixed cone sleeve 20, thereby achieving the tightening or loosening of the cylindrical structure sleeved on its outer surface. In the present application, the inner surface of the spring cone sleeve 30 has a diameter that increases from one end of the center shaft 10 to the center, so that it can be sleeved on the outer surface of the fixed cone sleeve 20.
[0022] The adjusting mechanism 40 is located outside the two spring cone sleeves 30 and connected with the spring cone sleeves 30. When the spring cone sleeve 30 is subjected to uniform force from the inside to the outside, its diameter will increase. The adjusting mechanism 40 provides a force for the axial movement of the spring cone sleeve 30 relative to the fixed cone sleeve 20, thereby causing the spring cone sleeve 30 to expand or contract radially under the extrusion force of the outer surface of the fixed cone sleeve 20. The operator can accurately control the clamping force by adjusting the adjusting mechanism according to the diameter of the cylindrical structure, ensuring that the cylindrical structure does not loosen during processing. The cylindrical structure can be a motor housing 50.
[0023] The clamp of the present application tightly presses the motor casing 50 from the inside of the motor casing 50, and the motor casing 50 is fixed. When the motor casing 50 is machined, it is not necessary to turn around for secondary machining, which ensures that the motor casing 50 has high precision and meets the design requirements, thereby eliminating various hidden troubles caused by poor precision of the motor casing 50, ensuring the quality of the motor casing 50, enhancing the stability of the motor, and improving the motor qualification rate. Moreover, the whole machining operation process is simple and easy to operate, and there is no need to align.
[0024] In a possible implementation, a center of each end face of the center shaft 10 is provided with a center hole; wherein the center holes of the two ends are respectively used for cooperating with two centers on the lathe to fix the lathe clamp.
[0025] Specifically, as shown in Figure 2 the cooperation of the center hole and the lathe center can ensure the stability of the clamp during installation, and prevent machining errors caused by shaking or displacement of the clamp. In addition, the two ends of the center shaft 10 are provided with center holes, so that the installation process of the clamp on the lathe is more simple and convenient, and precise positioning can be achieved only by inserting the center into the corresponding center hole.
[0026] In a possible implementation, the adjusting mechanism 40 includes a threaded sleeve 41 and a connecting plate 42; the threaded sleeve 41 is rotatably sleeved on the outer surface of the center shaft 10 under the action of an external force, and the inner surface of the first end of the threaded sleeve 41 is provided with an internal thread; the connecting plate 42 is slidably sleeved on the outer surface of the center shaft 10 in the axial direction and located between the threaded sleeve 41 and the spring cone sleeve 30; the outer surface of the first end of the connecting plate 42 is provided with an external thread which cooperates with the internal thread; the second end of the connecting plate 42 is connected with the spring cone sleeve 30; wherein when the threaded sleeve 41 rotates, the internal thread cooperates with the external thread to drive the spring cone sleeve 30 to reciprocate along the axial direction of the center shaft 10.
[0027] Specifically, as shown in Figure 3 the cooperation of the internal and external threads between the threaded sleeve 41 and the connecting plate 42 ensures the accuracy and stability of the adjustment. When the threaded sleeve 41 is rotated under the action of force, the axial movement distance of the connecting plate 42 along the center shaft can be accurately controlled through the close cooperation of the threads, and then the accurate adjustment of the spring cone sleeve 30 is realized. Only by rotating the threaded sleeve 41 can the adjustment of the spring cone sleeve 30 be realized, which has low operation difficulty and high work efficiency.
[0028] In a possible implementation, the outer surface of the center shaft 10 is provided with two ring grooves in the circumferential direction, the inner surface of the second end of each threaded sleeve 41 is provided with a pin hole, and the adjusting mechanism 40 further includes a pin 43 which is installed between one ring groove and one pin hole to limit the axial position of the corresponding threaded sleeve 41.
[0029] Specifically, the pin 43 is clamped between the ring groove and the pin hole, forming axial limiting, which can prevent axial movement of the threaded sleeve 41 during rotation, and ensure that the threaded fit between the threaded sleeve 41 and the connecting plate 42 always remains stable. The introduction of the pin 43 simplifies the installation and debugging process of the clamp, and only needs to insert the pin into the corresponding ring groove and pin hole to easily achieve axial limiting of the corresponding threaded sleeve 41, without the need for complex adjustment or calibration work. The pin 43 installed between each ring groove and the corresponding pin hole can be one or more, at least one, to ensure the axial position of the threaded sleeve 41.
[0030] In a possible implementation, the adjusting mechanism 40 further comprises a plurality of screws 44 uniformly distributed along the circumferential direction of the connecting plate 42 to fixedly connect the connecting plate 42 and the corresponding spring cone sleeve 30.
[0031] Specifically, the screw 44 serves as a connecting piece, which can on the one hand ensure the connection between the connecting plate 42 and the spring cone sleeve 30 to be more stable, and on the other hand transmit the force applied by the threaded sleeve 41 to the connecting plate 42 to the spring cone sleeve 30, so that the spring cone sleeve 30 can realize reciprocating movement in the axial direction when the adjusting mechanism 40 is stressed. The screw 44 is uniformly distributed along the circumferential direction of the connecting plate 42, and when subjected to external force, it can ensure that the force of the adjusting mechanism 40 on the spring cone sleeve 30 is uniformly distributed in the circumferential direction, avoiding stress concentration and improving the strength and durability of the overall structure.
[0032] The application is further illustrated by the following examples:
[0033] When using the utility model for turning, the central shaft 10 and the fixed cone sleeve 20 are installed together, and then the motor housing 50 to be processed is sleeved outside the entire clamp, and the lathe center is pressed against both end center holes to realize clamp fixation. Figure 1 Figure 4 ; The two threaded sleeves 41 are rotated, and the threaded sleeves 41 are provided with two pins 43 clamped into annular grooves on the central shaft 10 to prevent axial movement of the threaded sleeves 41 when rotating. When the threaded sleeves 41 rotate, the connecting plates 42 are driven to move axially on the central shaft 10 by the threaded sleeves 41, and the spring cone sleeves 30 are driven to move reciprocatingly on the fixed cone sleeve 20 by the connecting plates 42 through a plurality of screws 44. When the two threaded sleeves 41 are rotated to make the corresponding spring cone sleeves 41 move towards the fixed cone sleeve 20 in the direction of increasing diameter, the spring cone sleeves 30 are expanded to tighten the shell. Since all parts of the expansion core clamp are special machining parts with high process precision, the concentricity requirement of the lathe machining center and the shell is ensured after the shell is installed, and the parallelism between the two end faces and the perpendicularity between the two end faces and the inner hole of the shell are ensured when turning the two end faces. When the threaded sleeves 41 are rotated in the opposite direction to make the spring cone sleeves 30 move towards the end part of the central shaft 10 after the machining action is completed, the shell is gradually loosened. The turning of the lathe center is completed after the shell is loosened. The above-mentioned entire process is simple and easy to operate for the operator, and there is no need to align, which effectively improves the machining precision and work efficiency, reduces the labor intensity of workers, and ensures that the shell high precision meets the design requirements, thereby eliminating various hidden troubles caused by poor shell precision, thereby ensuring the motor quality, enhancing the stability of the motor, and improving the motor qualified rate.
[0034] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A precision double-cone core expansion lathe fixture, characterized in that: include: A central shaft (10) with both ends fixed on a lathe; Two fixed cone sleeves (20), the two fixed cone sleeves are symmetrically fixed to the central axis; the outer surface of the fixed cone sleeve (20) along the axial direction of the central axis is a cone surface, and the outer surface of the fixed cone sleeve (20) gradually increases in diameter along the direction from the end of the central axis to the center of the central axis; Two spring cone sleeves (30), the inner surface of each spring cone sleeve (30) correspondingly and slidably sleeved on the outer surface of the fixed cone sleeve (20), and the outer surface of the spring cone sleeve (30) is used to sleeve the cylindrical structural part to be processed; Two adjusting mechanisms (40) are sleeved on the central axis and located outside the two spring cone sleeves (30), and each adjusting mechanism (40) is connected to a corresponding spring cone sleeve (30); the adjusting mechanism (40) is used to drive the corresponding spring cone sleeve (30) to move back and forth along the axial direction of the central axis relative to the fixed cone sleeve (20) so that the spring cone sleeve (30) is radially expanded or contracted under the action of the outer surface of the fixed cone sleeve (20) to tighten or loosen the cylindrical structure.
2. A precision double-cone core expansion lathe fixture according to claim 1, characterized in that: A top hole is respectively provided at the center of the two end faces of the central shaft (10); The center holes at both ends are respectively used to cooperate with two centers on a lathe to fix the lathe fixture.
3. A precision double-cone core expansion lathe fixture according to claim 1, characterized in that: The regulating mechanism (40) comprises: A threaded sleeve (41), the threaded sleeve (41) is rotatably mounted on the outer surface of the central shaft (10) under external force, and the inner surface of the first end of the threaded sleeve (41) is provided with an internal thread; a connecting plate (42), the connecting plate (42) being slidably mounted on the outer surface of the central shaft (10) in the axial direction and being located between the threaded sleeve (41) and the spring cone sleeve (30); an outer surface of a first end of the connecting plate (42) being provided with an external thread, the external thread being matched with the internal thread; a second end of the connecting plate (42) being connected to the spring cone sleeve (30); When the threaded sleeve (41) rotates, the internal thread cooperates with the external thread to drive the spring cone sleeve (30) to move back and forth along the axial direction of the central axis (10).
4. A precision double-cone core expansion lathe fixture according to claim 3, characterized in that: The outer surface of the central shaft (10) is provided with two annular grooves along the circumferential direction, and the inner surface of the second end of each threaded sleeve (41) is provided with a pin hole. The adjustment mechanism (40) further comprises: A pin (43) is installed between one of the annular grooves and one of the pin holes to define the axial position of the corresponding threaded sleeve (41).
5. The precision double-cone core expansion lathe fixture according to claim 3, characterized in that: The regulating mechanism (40) further comprises: A plurality of screws (44) are evenly spaced and distributed along the circumferential direction of the connecting plate (42) to fix the connecting plate (42) and the corresponding spring cone sleeve (30).