CN112077340A - Pre-tightening device and machine tool - Google Patents

Pre-tightening device and machine tool Download PDF

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Publication number
CN112077340A
CN112077340A CN202010946379.0A CN202010946379A CN112077340A CN 112077340 A CN112077340 A CN 112077340A CN 202010946379 A CN202010946379 A CN 202010946379A CN 112077340 A CN112077340 A CN 112077340A
Authority
CN
China
Prior art keywords
pretensioning
tightening
support
chuck
workpiece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010946379.0A
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Chinese (zh)
Inventor
刘代伟
马徐武
张天翼
张秀峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Zhuhai Gree Intelligent Equipment Co Ltd
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Zhuhai Gree Intelligent Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai, Zhuhai Gree Intelligent Equipment Co Ltd filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202010946379.0A priority Critical patent/CN112077340A/en
Publication of CN112077340A publication Critical patent/CN112077340A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B25/00Accessories or auxiliary equipment for turning-machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/70Stationary or movable members for carrying working-spindles for attachment of tools or work

Abstract

The invention relates to a pre-tightening device and a machine tool, wherein the pre-tightening device comprises: a coasting mechanism; the pre-tightening mechanism is connected with the sliding mechanism and moves back and forth along the first direction of the axis of the chuck in the machine tool under the assistance of the sliding mechanism; and then the pre-tightening mechanism can be pushed to move to the direction close to the chuck to be abutted against the workpiece clamped on the chuck, so that the workpiece clamped on the chuck is pre-tightened. Only the pre-tightening mechanism needs to be moved in the pre-tightening process, so that the operation is simple and the processing efficiency is high. The pre-tightening mechanism comprises a base and a pre-tightening shaft assembled on the base along a first direction, the pre-tightening shaft is rotatably arranged around the base in the first direction, a workpiece clamped on the chuck can be tightly pressed by the pre-tightening shaft, and when the chuck drives the workpiece to rotate, the pre-tightening shaft also rotates around the first direction along with the workpiece, so that the workpiece is allowed to rotate around the first direction while the pre-tightening shaft presses the workpiece, normal rotation of the workpiece during machining can not be interfered, and the machining precision is improved.

Description

Pre-tightening device and machine tool
Technical Field
The invention relates to the technical field of machine tools, in particular to a pre-tightening device and a machine tool.
Background
Machine tools are machines for manufacturing machines, also called machine tools or machine tools, and are conventionally called machine tools for short. Generally, the machining method is divided into a metal cutting machine, a forging machine, a woodworking machine and the like. The methods for machining machine parts in modern machine manufacturing are numerous: in addition to cutting, casting, forging, welding, pressing, extruding, etc., however, in general, a part requiring high precision and fine surface roughness is finished by cutting on a machine tool. The machine tool plays an important role in the construction of national economy modernization.
In recent years, along with increasingly intense competition, the manufacturing industry is gradually developing towards high efficiency and high precision. However, most of the standard tailstock tightening devices provided in the numerically controlled lathes are used for processing workpieces, and the processing efficiency and accuracy are low.
Disclosure of Invention
The invention provides a pre-tightening device and a machine tool, aiming at the problem that the efficiency and the precision are lower when the tailstock of the traditional machine tool is applied to processing workpieces.
A pretensioning device, comprising:
a coasting mechanism; and
the pre-tightening mechanism is connected with the sliding mechanism and moves back and forth along a first direction of a chuck axis in the machine tool under the assistance of the sliding mechanism;
the pre-tightening mechanism comprises a base and a pre-tightening shaft assembled on the base along the first direction, and the pre-tightening shaft is rotatably arranged around the first direction relative to the base.
The pre-tightening mechanism is matched with the sliding mechanism in the pre-tightening device, the pre-tightening mechanism is allowed to move back and forth along the first direction, and then the pre-tightening mechanism can be pushed to move to the direction close to the chuck to be abutted against a workpiece clamped on the chuck, so that the workpiece clamped on the chuck is pre-tightened. Only the pre-tightening mechanism needs to be moved in the pre-tightening process, so that the operation is simple and the processing efficiency is high. In addition, the workpiece clamped on the chuck can be tightly pushed through the pre-tightening shaft along the first direction device, the pre-tightening shaft is rotatably arranged around the first direction relative to the base, and when the chuck drives the workpiece to rotate, the pre-tightening shaft also rotates around the first direction along with the workpiece, so that the workpiece is allowed to rotate around the first direction while the pre-tightening shaft pushes the workpiece tightly, normal rotation of the workpiece during machining can not be interfered, and the machining precision is improved.
In one embodiment, the pre-tightening mechanism further comprises a bearing, the bearing is assembled in the base, one end of the pre-tightening shaft is sleeved in an inner ring of the bearing, and the other end of the pre-tightening shaft extends out of the inner ring of the bearing.
In one embodiment, the sliding mechanism includes a base plate, a guide rail and a sliding assembly, the guide rail is disposed on the base plate in a direction parallel to the first direction, the sliding assembly is slidably disposed on the guide rail, and the pre-tightening mechanism is fixed on the sliding assembly.
In one embodiment, the sliding mechanism further comprises a locking member, the locking member is slidably disposed on the guide rail and is fixedly connected with the sliding assembly;
the locking member has a locked state and an unlocked state, and in the locked state, the locking member clamps the rail; in the unlocked state, the locking member releases the guide rail.
In one embodiment, the sliding assembly comprises a sliding block and a cover plate, the sliding block is slidably arranged on the guide rail, the cover plate is fixedly connected with the sliding block and covers the guide rail, and the pre-tightening mechanism is fixed on the cover plate.
In one embodiment, the chuck further comprises a support mechanism configured to form a support location for supporting an end of the workpiece remote from the chuck.
In one embodiment, the support mechanism is connected to the slide mechanism, and the support mechanism slides synchronously with the pretensioning mechanism by means of the slide mechanism.
In one embodiment, the supporting mechanism includes a supporting member, a first rotating member and a second rotating member, the supporting member is fixed on the sliding mechanism or the base, the first rotating member and the second rotating member are both rotatably disposed on the supporting member along a direction parallel to the first direction, the first rotating member and the second rotating member are oppositely disposed at an interval, and the supporting position is formed between the first rotating member and the second rotating member.
In one embodiment, the support mechanism comprises two, one of the two support mechanisms forming a support position for supporting the rotor body, and the other of the two support mechanisms forming a support position for supporting the rotor shaft.
In one embodiment, the device further comprises a handle, and the handle is fixed on the base.
A machine tool comprises a spindle box, a chuck and the pre-tightening device, wherein the chuck is connected with the output end of the spindle box, and the pre-tightening device is fixed on a shell of the spindle box.
Drawings
FIG. 1 is a schematic view of a machine tool according to an embodiment of the present invention;
FIG. 2 is a schematic view of a portion of the machine tool shown in FIG. 1;
FIG. 3 is a schematic view of a pretensioning device in the machine tool shown in FIG. 1;
fig. 4 is a schematic view of the construction of the pretensioning device shown in fig. 3 from another perspective.
200. A machine tool; 210. a main spindle box; 230. a chuck; 100. a pre-tightening device; 10. a coasting mechanism; 12. a substrate; 14. a guide rail; 16. a sliding assembly; 161. a slider; 163. a cover plate; 18. a locking member; 30. a pre-tightening mechanism; 32. a base; 34. pre-tightening the shaft; 36. a bearing; 50. a support mechanism; 51. a support position; 52. a support member; 54. a first rotating member; 56. a second rotating member; 70. a handle.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Referring to fig. 1-2, in an embodiment of the present invention, a machine tool 200 is provided, which includes a main spindle box 210, a chuck 230 and a pre-tightening device 100, wherein the chuck 230 is connected to an output end of the main spindle box 210, the chuck 230 is configured to clamp a workpiece to be machined, and the chuck 230 is driven to rotate by a transmission mechanism in the main spindle box 210, so as to drive the workpiece clamped by the chuck 230 to rotate, and further, the workpiece rotated by a tool can be machined to obtain a part with a preset shape. In addition, the pre-tightening device 100 is fixed on the housing of the spindle box 210, and can apply a pushing force to one end of the workpiece far away from the chuck 230, so that the workpiece is supported by the chuck 230 and the pre-tightening device 100, the workpiece is prevented from shaking in the machining process, and the machining precision is ensured.
Referring to fig. 2 to 4, the pretensioning device 100 includes a slide mechanism 10 and a pretensioning mechanism 30, the pretensioning mechanism 30 is connected to the slide mechanism 10, and the pretensioning mechanism 30 moves back and forth along a first direction in which an axis of a chuck 230 in a machine tool 200 is located with the aid of the slide mechanism 10. In this way, the engagement between the preloading mechanism 30 and the slide mechanism 10 allows the preloading mechanism 30 to move back and forth in the first direction, and further, the preloading mechanism 30 can be pushed to move in the direction approaching the chuck 230 to abut against the workpiece clamped on the chuck 230, thereby preloading the workpiece clamped on the chuck 230. Only the pre-tightening mechanism 30 needs to be moved in the pre-tightening process, so that the operation is simple and the processing efficiency is high.
Furthermore, the pretensioning mechanism 30 comprises a base 32 and a pretensioning shaft 34 mounted on the base 32 along a first direction, wherein the pretensioning shaft 34 is rotatably arranged relative to the base 32 around the first direction. Therefore, the workpiece clamped on the chuck 230 can be tightly pushed through the pre-tightening shaft 34 along the first direction device, the pre-tightening shaft 34 can be rotatably arranged relative to the base 32 in the first direction, when the chuck 230 drives the workpiece to rotate, the pre-tightening shaft 34 also rotates around the first direction along with the workpiece, so that the workpiece is allowed to rotate around the first direction while the pre-tightening shaft 34 pushes the workpiece tightly, normal rotation of the workpiece during machining is not interfered, and machining precision is improved.
Further, the pre-tightening mechanism 30 further includes a bearing 36, the bearing 36 is assembled in the base 32, one end of the pre-tightening shaft 34 is sleeved in an inner ring of the bearing 36, and the other end of the pre-tightening shaft 34 extends out of the inner ring of the bearing 36 for abutting against the workpiece. Thus, the pre-tightening shaft 34 is assembled through the bearing 36, allowing the pre-tightening shaft 34 to rotate flexibly, and reducing the friction force when the pre-tightening shaft 34 rotates relative to the base 32.
The sliding mechanism 10 includes a base plate 12, a guide rail 14 and a sliding assembly 16, wherein the guide rail 14 is disposed on the base plate 12 in a direction parallel to the first direction, the sliding assembly 16 is slidably disposed on the guide rail 14, and the pre-tightening mechanism 30 is fixed on the sliding assembly 16. Thus, the guide rail 14 parallel to the first direction is arranged on the substrate 12, and when the sliding assembly 16 slides along the guide rail 14, the pre-tightening mechanism 30 fixed on the sliding assembly 16 is driven to slide along the guide rail 14, so that the pre-tightening mechanism 30 moves back and forth along the first direction, thereby realizing pre-tightening operation on a workpiece, further reducing vibration in the process of processing the workpiece, and improving the roughness of the surface of the workpiece. Alternatively, the base plate 12 is fixed to the housing of the headstock 210, and then provides a mounting base for the coasting mechanism 10 and the pretensioning mechanism 30.
Specifically, the sliding assembly 16 includes a sliding block 161 and a cover plate 163, the sliding block 161 is slidably disposed on the guide rail 14, the cover plate 163 is fixedly connected to the sliding block 161 and covers the guide rail 14, and the pre-tightening mechanism 30 is fixed on the cover plate 163. Thus, the slider 161 is engaged with the guide rail 14 to move the cover 163 back and forth along the guide rail 14, and further, the pretensioner mechanism 30 fixed to the cover 163 is moved back and forth in the first direction. Meanwhile, the cover plate 163 covers the guide rail 14, and the guide rail 14 is hidden in the cover plate 163, so that the outer surface of the sliding assembly 16 is cleaner.
The sliding mechanism 10 further includes a locking member 18, the locking member 18 is slidably disposed on the guide rail 14 and is fixedly connected to the sliding assembly 16; the locking piece 18 has a locking state and an unlocking state, when in the locking state, the locking piece 18 clamps the guide rail 14, the locking piece 18 is fixed on the guide rail 14, and then the sliding assembly 16 fixedly connected with the locking piece 18 is fixed on the guide rail 14, and the sliding assembly 16 which slides in place is limited; in the unlocked state, the latch member 18 releases the track 14 and the latch member 18 and slide assembly 16 slide together along the track 14, allowing the slide assembly 16 to adjust position. Alternatively, the lock 18 is a rail 14 clamp.
Specifically, in the process of processing a workpiece, one end of the workpiece is clamped on the chuck 230, the locking member 18 is in the unlocked state, the sliding assembly 16 is allowed to slide along the guide rail 14, the pre-tightening mechanism 30 is allowed to move towards the chuck 230 along the first direction, the workpiece clamped on the chuck 230 is tightly pressed by the pre-tightening shaft 34, finally, the locking member 18 is switched to the locked state, the sliding assembly 16 is locked, the pre-tightening mechanism 30 fixed on the sliding assembly 16 is locked, and the pre-tightening mechanism 30 which is moved in place is fixed, so that the workpiece processing can be started. Therefore, the pre-tightening mechanism 30 which is adjusted to the position is limited through the locking piece 18, the pre-tightening mechanism 30 is prevented from shaking in the workpiece machining process, and the precision of the machined workpiece is further improved.
In the rotor course of working, because the rotor includes rotor body and sets up in the rotor shaft at rotor body both ends along axial protrusion, the diameter of rotor shaft is less than rotor body's diameter, and the diameter at the whole both ends of rotor is less, inconvenient clamping, and required time is longer when traditional lathe 200 material loading, and machining efficiency is lower.
In order to solve the above technical problem, in an embodiment of the present invention, the pre-tightening device 100 further includes a supporting mechanism 50, the supporting mechanism 50 is configured to form a supporting position 51, the supporting position 51 is used for supporting one end of the workpiece away from the chuck 230, so as to support one end of the rotor away from the chuck 230 through the supporting position 51, and during a loading process, the rotor can be supported and limited by the supporting member 52, so as to improve convenience of clamping the rotor, and further improve loading efficiency.
Further, the support mechanism 50 comprises two, one of the two support mechanisms 50 forming a support site 51 for supporting the rotor body and the other of the two support mechanisms 50 forming a support site 51 for supporting the rotor shaft, such that the support mechanisms 50 are arranged to match the outer shape of the rotor. In the feeding process, the rotor main body and the rotor shaft in the rotor are respectively supported through the two supporting positions 51, so that the rotor is reliably and stably supported, then the rotor shaft on one side of the rotor body is clamped by the chuck 230, and the rotor shaft on the other side of the rotor body is tightly jacked by the pre-tightening mechanism 30, so that the feeding process can be completed, the feeding process cannot be influenced due to the fact that the diameter of the rotor shaft is small, and the feeding efficiency is improved.
In some embodiments, the support mechanism 50 is coupled to the sled mechanism 10, and the support mechanism 50 slides synchronously with the pretensioning mechanism 30 via the sled mechanism 10, so that the support mechanism 50 can be fixed to the sled mechanism 10 or the pretensioning mechanism 30 without occupying a position on the base plate 12. Meanwhile, the supporting mechanism 50 and the pre-tightening mechanism 30 slide synchronously, so that the supporting mechanism 50 can slide to the middle position of the rotor to provide more uniform supporting force.
Further, the supporting mechanism 50 includes a supporting member 52, a first rotating member 54 and a second rotating member 56, the supporting member is fixed on the sliding mechanism 10 or the base 32, the first rotating member 54 and the second rotating member 56 are both rotatably disposed on the supporting member 52 along a direction parallel to the first direction, the first rotating member 54 and the second rotating member 56 are disposed at an opposite interval, and a supporting position 51 is formed between the first rotating member 54 and the second rotating member 56. Thus, after the first rotating member 54 and the second rotating member 56 form the supporting position 51, and the rotor is placed on the supporting position 51, when the chuck 230 rotates the rotor during the machining process, the first rotating member 54 and the second rotating member 56 are rotated adaptively, allowing the rotor to rotate flexibly on the supporting position 51 for machining, and reducing the friction between the first rotating member 54 and the second rotating member 56 and the rotor.
In the present embodiment, one of the two supporting mechanisms 50 supporting the rotor main body is fixed to the slide mechanism 10, and one of the two supporting mechanisms 50 supporting the rotor shaft is fixed to the base 32 of the pre-tightening mechanism 30, so that the two supporting mechanisms 50 can be reasonably arranged in an effective space. It is understood that in other embodiments, two supporting mechanisms 50 may be disposed on the sliding mechanism 10, and the mounting base of the supporting mechanism 50 is not limited herein.
In some embodiments, the pre-tightening device 100 further includes a handle 70, and the handle 70 is fixed to the base 32 of the pre-tightening mechanism 30, so that when the pre-tightening mechanism 30 needs to be moved, an operator holds the handle 70 to apply a push-pull force in a first direction, and then drives the pre-tightening mechanism 30 to move back and forth in the first direction, so as to tighten and release the workpiece.
Based on the same technical concept, the invention further provides the preloading device 100, the preloading device 100 comprises a sliding mechanism 10 and a preloading mechanism 30, the preloading mechanism 30 is connected with the sliding mechanism 10, and the preloading mechanism 30 moves back and forth along the first direction of the axis of the chuck 230 in the machine tool 200 under the assistance of the sliding mechanism 10. In this way, the engagement between the preloading mechanism 30 and the slide mechanism 10 allows the preloading mechanism 30 to move back and forth in the first direction, and further, the preloading mechanism 30 can be pushed to move in the direction approaching the chuck 230 to abut against the workpiece clamped on the chuck 230, thereby preloading the workpiece clamped on the chuck 230. Only the pre-tightening mechanism 30 needs to be moved in the pre-tightening process, so that the operation is simple and the processing efficiency is high.
Furthermore, the pretensioning mechanism 30 comprises a base 32 and a pretensioning shaft 34 mounted on the base 32 along a first direction, wherein the pretensioning shaft 34 is rotatably arranged relative to the base 32 around the first direction. Therefore, the workpiece clamped on the chuck 230 can be tightly pushed through the pre-tightening shaft 34 along the first direction device, the pre-tightening shaft 34 can be rotatably arranged relative to the base 32 in the first direction, when the chuck 230 drives the workpiece to rotate, the pre-tightening shaft 34 also rotates around the first direction along with the workpiece, so that the workpiece is allowed to rotate around the first direction while the pre-tightening shaft 34 pushes the workpiece tightly, normal rotation of the workpiece during machining is not interfered, and machining precision is improved.
In the rotor course of working, because the rotor includes rotor body and sets up in the rotor shaft at rotor body both ends along axial protrusion, the diameter of rotor shaft is less than rotor body's diameter, and the diameter at the whole both ends of rotor is less, inconvenient clamping, and required time is longer when traditional lathe 200 material loading, and machining efficiency is lower.
In order to solve the above technical problem, in an embodiment of the present invention, the pre-tightening device 100 further includes a supporting mechanism 50, the supporting mechanism 50 is configured to form a supporting position 51, the supporting position 51 is used for supporting one end of the workpiece away from the chuck 230, so as to support one end of the rotor away from the chuck 230 through the supporting position 51, and during a loading process, the rotor can be supported and limited by the supporting member 52, so as to improve convenience of clamping the rotor, and further improve loading efficiency.
Further, the support mechanism 50 comprises two, one of the two support mechanisms 50 forming a support site 51 for supporting the rotor body and the other of the two support mechanisms 50 forming a support site 51 for supporting the rotor shaft, such that the support mechanisms 50 are arranged to match the outer shape of the rotor. In the feeding process, the rotor main body and the rotor shaft in the rotor are respectively supported through the two supporting positions 51, so that the rotor is reliably and stably supported, then the rotor shaft on one side of the rotor body is clamped by the chuck 230, and the rotor shaft on the other side of the rotor body is tightly jacked by the pre-tightening mechanism 30, so that the feeding process can be completed, the feeding process cannot be influenced due to the fact that the diameter of the rotor shaft is small, and the feeding efficiency is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (11)

1. A pretensioning device, characterized in that the pretensioning device comprises:
a skid mechanism (10); and
the pre-tightening mechanism (30), the pre-tightening mechanism (30) is connected with the sliding mechanism (10), and the pre-tightening mechanism (30) moves back and forth along a first direction where the axis of a chuck (230) in the machine tool is located under the assistance of the sliding mechanism (10);
the pretensioning mechanism (30) comprises a base (32) and a pretensioning shaft (34) assembled on the base (32) along the first direction, and the pretensioning shaft (34) can be rotatably arranged relative to the base (32) around the first direction.
2. The pretensioning device according to claim 1, wherein the pretensioning mechanism (30) further comprises a bearing (36), the bearing (36) is assembled in the base (32), one end of the pretensioning shaft (34) is sleeved in an inner ring of the bearing (36), and the other end of the pretensioning shaft (34) extends out of the inner ring of the bearing (36).
3. The pretensioning apparatus according to claim 1, wherein the sliding mechanism (10) comprises a base plate (12), a guide rail (14), and a sliding member (16), the guide rail (14) is disposed on the base plate (12) in a direction parallel to the first direction, the sliding member (16) is slidably disposed on the guide rail (14), and the pretensioning mechanism (30) is fixed to the sliding member (16).
4. The pretensioning device according to claim 3, wherein the coasting mechanism (10) further comprises a lock member (18), the lock member (18) being slidably disposed on the rail (14) and fixedly connected to the sliding assembly (16);
the locking member (18) having a locked state in which the locking member (18) grips the guide rail (14) and an unlocked state; in the unlocked state, the locking element (18) releases the guide rail (14).
5. The pretensioning device according to claim 3, wherein the sliding assembly (16) comprises a sliding block (161) and a cover plate (163), the sliding block (161) is slidably disposed on the guide rail (14), the cover plate (163) is fixedly connected with the sliding block (161) and covers the guide rail (14), and the pretensioning mechanism (30) is fixed on the cover plate (163).
6. The pretensioning device according to any one of claims 1-5, further comprising a support mechanism (50), the support mechanism (50) being configured to form a support location (51), the support location (51) being configured to support an end of a workpiece remote from the chuck (230).
7. The pretensioning device according to claim 6, characterized in that the support means (50) is connected to the slide means (10), the support means (50) sliding synchronously with the pretensioning means (30) by means of the slide means (10).
8. The preloading device according to claim 7, characterized in that the support mechanism (50) comprises a support element (52), a first rotary element (54) and a second rotary element (56), the support element being fixed to the running gear (10) or the base (32), the first rotary element (54) and the second rotary element (56) being rotatably arranged on the support element (52) in a direction parallel to the first direction, and the first rotary element (54) and the second rotary element (56) being arranged at a distance from one another, the first rotary element (54) and the second rotary element (56) forming the support location (51) therebetween.
9. The pretensioning device according to claim 6, characterized in that the support means (50) comprises two, one of the two support means (50) forming a support site (51) for supporting the rotor body and the other of the two support means (50) forming a support site (51) for supporting the rotor shaft.
10. The pretensioning apparatus according to any one of claims 1-5, further comprising a handle (70), wherein the handle (70) is fixed to the pretensioning mechanism (30).
11. A machine tool comprising a headstock (210), a chuck (230) and a pretensioning device according to any one of claims 1 to 10, said chuck (230) being connected to an output of said headstock (210), said pretensioning device being fixed to a housing of said headstock (210).
CN202010946379.0A 2020-09-10 2020-09-10 Pre-tightening device and machine tool Pending CN112077340A (en)

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CN107243652A (en) * 2017-06-12 2017-10-13 罗厚镇 A kind of automobile Machining of Shaft-type Parts fastener
CN210702634U (en) * 2019-08-22 2020-06-09 沈阳理工大学 Special clamp for shaft parts
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CN106441008A (en) * 2016-11-29 2017-02-22 成都中车电机有限公司 Device for measuring radial deflection on surface of armature commutator
CN107243652A (en) * 2017-06-12 2017-10-13 罗厚镇 A kind of automobile Machining of Shaft-type Parts fastener
CN210702634U (en) * 2019-08-22 2020-06-09 沈阳理工大学 Special clamp for shaft parts
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Application publication date: 20201215