Transmission assembly and positioning device capable of achieving rotating and moving of rotating shaft at same time

Abstract

The utility model relates to the technical field of mechanical positioning, and particularly discloses a transmission assembly capable of realizing simultaneous rotation and movement of a rotating shaft, which comprises the rotating shaft, a driving seat, a fixing seat and a nut, the driving seat is used for rotating, the rotating shaft is axially connected onto the driving seat in a sliding manner, the fixing seat is fixedly mounted, and the nut is in threaded connection with an inner hole of the fixing seat. The nut is installed on the rotating shaft and is coaxial with the rotating shaft. The nut is used for rotating together with the rotating shaft. The positioning device comprises a positioning pin and further comprises the transmission assembly capable of achieving simultaneous rotation and movement of the rotating shaft, the positioning pin is provided with a hollow structure, the rotating shaft is a stepped shaft, the small-diameter section of the rotating shaft is sleeved with the positioning pin, and the section, extending out of the positioning pin, of the rotating shaft is used for being in threaded connection with the bottom of a positioning hole of a positioned piece. According to the scheme, the problem that in the prior art, the cost is high due to the fact that rotating and moving of the rotating shaft can be achieved only through two drives is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical positioning technical field, concretely relates to a kind of transmission assembly and positioning device for realizing rotation shaft side rotation side shift. BACKGROUND

[0002] In the positioning of machining or product in use, positioning pin is used for positioning, for example, in machining, workpiece installed on chuck needs to be rotated to different angles for machining, positioning is needed after each angle rotation, for example, workpiece on chuck needs to be positioned and machined after rotating 60 °, workpiece machining needs chuck to rotate 6 times, and 6 times positioning is carried out, 6 positioning holes are usually set on chuck, and positioning is completed by inserting positioning pin into corresponding positioning hole;For example, a certain equipment needs to be rotated to different angles for use in use, and positioning is needed after each rotation to the required angle, and positioning is also carried out by setting positioning hole on the positioned part, and positioning pin is inserted into positioning hole after moving along the guide hole on positioning seat to realize positioning.

[0003] For occasions with low positioning accuracy requirements, positioning can be realized as long as positioning pin is inserted into positioning hole, and this type of positioning method has manual positioning method, such as patent publication No. CN103831635A "adjustable positioner", locking nut connected with positioning shaft can control positioning shaft to move while rotating to insert into the positioning hole to be positioned to complete positioning;There are also electric control or hydraulic control positioning structure, such as patent publication No. CN202028970U "hydraulic drive slot wheel indexing positioning pin type indexing device", the hydraulic drive positioning mechanism needs to be positioned when positioning pin is inserted into the positioning pin hole on the indexing disc slot, only need to control positioning oil cylinder to start, and positioning pin can automatically complete positioning after inserting into the positioning pin hole on the indexing disc slot;For example, patent publication No. CN217596611U "positioning pin type indexing positioning device", the patent technology controls electric drive rod to drive positioning shaft (also can be called positioning pin) to insert into positioning hole after chuck rotates to the required angle to complete positioning.

[0004] The existing positioning structure is all from the single side of the positioned hole to apply pressure for compression positioning, and there is no way to use the force of the positioned part itself for tension positioning to avoid the rebound of the positioning pin, the inventor proposes a positioning pin with a hollow structure, which is used in cooperation with a stepped drive rod, the drive rod with the positioning pin is moved towards the positioning hole to drive the hollow positioning pin to insert into the positioning hole, and after the positioning pin is attached to the positioning hole, the drive rod is screwed to enable one end of the drive rod penetrating the positioning pin to be connected with the threaded hole opened at the bottom of the positioning hole, thereby realizing the function of tensioning the positioning pin on the positioned part through the drive rod and avoiding the rebound after positioning. However, the drive rod needs to move the positioning pin to approach the positioning hole, and also needs to be screwed into the threaded hole at the bottom of the positioning hole when the positioning pin is tensioned to approach the positioning hole, so that the drive rod can move linearly and rotate (i.e. the drive rod has the function of rotating while moving, and the drive rod is also referred to as a rotating shaft in this paper), and in the current way, two kinds of movements must be achieved by setting a rotary drive machine and a linear drive machine, and two drives make the cost of the drive rod realizing the rotation while moving higher. Practical new type content

[0005] The utility model intends to provide a transmission assembly realizing rotation while moving of rotating shaft, to solve the problem of high cost caused by the need of two drives to realize rotation while moving of rotating shaft in prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A transmission assembly realizing rotation while moving of rotating shaft, comprising rotating shaft, drive seat, fixed seat and nut, the drive seat is used for rotating, the rotating shaft is axially slidably connected on the drive seat, the fixed seat is fixedly installed, the nut is threadedly connected in the inner hole of the fixed seat, the nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft.

[0008] The principle and advantages of the scheme are: when the rotating shaft needs to rotate while moving, only the rotation of the drive seat needs to be controlled, and the rotating shaft will rotate, and the nut will also rotate with the rotating shaft because the nut is installed, and the nut will move because it rotates in the inner hole of the fixed seat, and the rotating shaft will rotate with the nut because the nut is installed on the rotating shaft, thereby realizing the rotation while moving of the rotating shaft; and only a rotating force needs to be given to the drive seat to realize the transmission assembly realizing rotation while moving of the rotating shaft, that is, only a rotary drive machine is needed, compared with the prior art, the use of a linear drive machine can be reduced by means of the low-cost nut, fixed seat and drive seat, which helps to reduce the cost.

[0009] Preferably, as an improvement, a taper sleeve is arranged between the nut and the rotating shaft, the taper sleeve is sleeved on the nut, the rotating shaft is sleeved on the taper sleeve, the taper sleeve is axially slidably connected to the rotating shaft, the taper sleeve is conically matched with the nut, and an elastic element is arranged between the taper sleeve and the nut to abut the taper sleeve against the nut.

[0010] Beneficial effects: when the taper sleeve is arranged, if the rotating shaft needs to rotate while moving, the rotation of the rotating shaft will make the nut rotate while moving along the inner hole of the fixed base through the conical matching of the taper sleeve and the nut abutted by the elastic element; when the nut cannot move, if the rotating shaft is continuously driven to rotate by the driving seat, without the taper sleeve and the elastic element, the entire transmission assembly will be locked, but the taper sleeve and the rotating shaft will idle relative to the nut even if this situation occurs, thereby avoiding the locking.

[0011] Preferably, as an improvement, a spacer ring is arranged on the nut, and the elastic element is located between the spacer ring and the large-size section of the taper sleeve, one end of the elastic element abutting against the spacer ring and the other end abutting against the taper sleeve.

[0012] Preferably, as an improvement, a limiting pin is fixed to the inner wall of the nut, the spacer ring is located between the limiting pin and the elastic element, and the limiting pin limits the position of the spacer ring, so that the spacer ring is more simple to disassemble and assemble.

[0013] Preferably, as an improvement, a containing hole is arranged on the large-size end face of the taper sleeve, the elastic element comprises a sliding body and a spring connected to the sliding body, the spring is located in the containing hole, and the sliding body abuts against the spacer ring; the present application facilitates the disassembly and assembly of the elastic element with a simple structure.

[0014] Preferably, as an improvement, a blocking piece is further fixed to the rotating shaft, the blocking piece is used to abut against the small-size end face of the taper sleeve, the blocking piece is located on the two sides of the nut together with the positioning pin, and the blocking piece is used to abut against the driving seat.

[0015] Beneficial effects: when the blocking piece is arranged, after the rotating shaft rotates while moving to move away from the positioning hole, the blocking piece limits the continuous movement of the rotating shaft when the rotating shaft moves to abut against the end face of the driving seat, so that the rotating shaft only rotates, at this time, the taper sleeve and the nut will continue to rotate, the nut continuously rotates and moves axially, after the taper sleeve cannot continue to move axially along the rotating shaft, the taper sleeve idles relative to the nut, and the nut no longer moves, thereby ensuring that even if the rotating shaft does not stop in time, the structure is also avoided from being locked, which is equivalent to realizing the protection of the transmission assembly in the direction away from the positioning hole.

[0016] Preferably, as an improvement, a displacement limiting structure is arranged between the sleeve and the shaft, the displacement limiting structure comprises a displacement limiting groove and a displacement limiting pin, the displacement limiting pin is slidably arranged in the displacement limiting groove, the displacement limiting groove is axially parallel to the shaft, one of the displacement limiting groove and the displacement limiting pin is arranged on the shaft, and the other is arranged on the inner surface of the sleeve.

[0017] Preferably, as an improvement, the drive machine and the drive sleeve are further provided, the drive machine drives the drive sleeve to rotate, the drive sleeve and the drive seat are connected through an elastic assembly, the elastic assembly comprises a spring which is radially stretchable and a connecting piece which is arranged at the end of the spring, the connecting piece is provided with a spherical surface, the spherical surface of the connecting piece is located at the joint of the drive sleeve and the drive seat, the drive seat and the drive sleeve are both provided with a receiving groove for accommodating the spherical surface of the connecting piece, and the spring and the connecting piece can be squeezed into the same receiving groove.

[0018] Beneficial effects: when the shaft does not need to rotate and the drive machine has not stopped outputting, the power of the drive machine is transmitted to the drive sleeve, the drive seat cannot rotate because the shaft cannot rotate, the receiving groove on the drive sleeve pushes the connecting piece at this time, the connecting piece is completely located in the receiving groove on one side of the position of the spring after being squeezed, the drive sleeve and the drive seat are disconnected, safety problems are avoided, and overload protection is formed.

[0019] The utility model discloses still provide a kind of positioning device, including positioning pin, still including the transmission assembly of realization shaft side rotation side displacement, positioning pin has hollow structure, shaft is stepped shaft, positioning pin is sleeved on the small diameter section of shaft, the section of shaft that extends out of positioning pin is used to be threadedly connected with the bottom of the positioning hole of the positioned piece.

[0020] The positioning device of the present application can drive the shaft to rotate and move simultaneously by rotating the driving seat on the transmission assembly, thereby driving the positioning pin to move away from or approach the positioning hole. After the positioning pin is inserted into the positioning hole, the continuous rotation and movement of the shaft can tighten the positioning pin in the positioning hole, thereby connecting the positioning pin, the positioned piece and the shaft into one body, greatly improving the positioning stability after positioning and ensuring that the positioning device will not rebound.

[0021] Preferably, as an improvement, the positioning device further comprises a positioning seat with a guide hole, the positioning pin is slidably connected in the guide hole, the guide hole is coaxially arranged with the shaft, the end of the positioning pin away from the positioning hole is provided with a plurality of petal-shaped elastic blocks distributed in the circumferential direction, the shaft is further sleeved with a tensioning block, the tensioning block is located between the nut and the positioning pin, the end face of the tensioning block away from the positioning pin is opposite to the stepped surface of the shaft, the tensioning block and the elastic block can be wedge / tapered surface matched, the elastic block is located on the circumferential outer side of the tensioning block, the tensioning block is coaxial with the guide hole and the positioning pin, and the outer periphery of the elastic block abuts against the guide hole after the tensioning block expands the elastic block.

[0022] Beneficial effects: when the positioning pin is moved towards the positioning hole of the positioned part, the elastic block is moved by the rotating shaft, and after the elastic block is moved, it pushes the elastic block outward to open outward, so that the elastic block on the positioning pin is evenly pressed in the guide hole of the positioning seat, thereby eliminating the gap between the positioning pin and the guide hole, ensuring smooth movement of the positioning pin along the guide hole before and after positioning, and ensuring high-precision positioning after eliminating the gap in a tight manner. After tightening, not only does it achieve radial positioning and tightening of the positioning pin, but it also sets an obstacle for the axial movement of the positioning pin, ensuring that the positioning pin is not easily moved radially or axially, and also ensuring the positioning accuracy.

[0023] In addition, the elastic block tightly fits the guide hole in the positioning seat under the tightening of the elastic block, so that the outwardly extending positioning pin and the positioning seat form a whole. Even if the positioned part is vibrated by external force, it will not affect the positioning accuracy of the positioning device.

[0024] Preferably, as an improvement, a limiting stopper is fixed on the rotating shaft, the elastic block is located between the limiting stopper and the stepped surface of the rotating shaft, and the free end of the elastic block is fixed with a limiting plug rod facing the rotating shaft, and the limiting plug rod is used to abut against the end surface of the elastic block.

[0025] In the existing positioning structure, a positioning seat with a guide hole is also provided, but the smooth movement of the positioning pin will inevitably result in a gap between the guide hole and the positioning pin. Under the gap fit, the positioning pin will inevitably have a moving space, thereby affecting the positioning accuracy, especially when the positioned part is vibrated or unevenly stressed after being positioned, which will affect the positioning accuracy.

[0026] When the rotating shaft drives the elastic block to move towards the positioned part to tighten the elastic block, the stepped surface on the rotating shaft gives the elastic block a pushing force to make the elastic block open outward to tighten the guide hole, thereby realizing positioning without a gap between the positioning pin and the guide hole.

[0027] When the positioning pin needs to be reset, only the rotating shaft needs to be controlled to reset (i.e. move away from the positioning hole). During the resetting process of the rotating shaft, the limiting stopper pushes the elastic block to reset to loosen the elastic block, and after the elastic block loses the tightening of the elastic block, the gap between the elastic block and the guide hole increases, facilitating the smooth movement of the rotating shaft and the positioning pin in the guide hole. At the same time, through the abutment of the elastic block and the limiting plug rod, the positioning pin is driven away from the positioning hole together with the rotating shaft, thereby realizing the release of positioning.

[0028] It can be seen that through the setting of the limiting plug rod and the limiting stopper, different direction movement operations of the rotating shaft by the driving machine can realize high-precision positioning and release of positioning, and the operation mode is simple and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1The utility model discloses a shaft section view schematic diagram of the transmission assembly of the rotating and moving shaft of the embodiment one of the utility model.

[0030] Figure 2 For Figure 1 The schematic diagram of not showing drive machine behind.

[0031] Figure 3 For Figure 1 The shaft section view schematic diagram of the transmission assembly in the fixed position device.

[0032] Figure 4 The utility model discloses a local shaft section view schematic diagram of the display limit shift nail fixed on the rotating shaft of the embodiment two.

[0033] Figure 5 The utility model discloses a local shaft section view schematic diagram of the display limit shift nail fixed on the rotating shaft of the embodiment two.

[0034] Figure 6 The utility model discloses a shaft section view schematic diagram of the fixed position device of the embodiment three (the state under the rotating shaft big diameter end face and be pressed on the tight block to the elastic block is opened up).

[0035] Figure 7 The utility model discloses a shaft section view schematic diagram of the display position relation between the positioning pin, the fixed position seat, the tight block and the rotating shaft of the embodiment three.

[0036] Figure 8 The utility model discloses a shaft section view schematic diagram of the fixed position device of the embodiment three in the fixed position release state. Specific embodiments

[0037] The following is further explained in detail by specific embodiments:

[0038] The reference signs in the drawings of the specification include: the fixed position piece 10, the positioning pin 1, the elastic block 11, the limit shift rod 12, the guide groove 13, the fixed position seat 2, the rotating shaft 3, the limit stop piece 31, the blocking piece 32, the tight block 4, the limit ring 41, the guide column 42, the drive machine 5, the drive sleeve 51, the elastic assembly 61, the connecting piece 611, the spring 612, the containing groove 600, the drive seat 6, the fixed seat 7, the nut 81, the taper sleeve 82, the elastic piece 83, the isolation ring 84, the limit shift nail 85, the limit shift groove 86.

[0039] Embodiment one

[0040] Combined Figures 1 to 3The utility model provides a kind of transmission assembly of realization rotation shaft side transfer, including rotation shaft 3, drive machine 5, drive seat 6, fixed seat 7, nut 81, cone sleeve 82, elastic piece 83 that nut 81 is resisted on cone sleeve 82, rotation shaft 3 is three-step ladder shape, rotation shaft 3 is the cylindrical section of three different diameters of integrated molding, the cylindrical section of rotation shaft 3 is divided into small diameter section, medium diameter section and large diameter section along axial direction, the small diameter section of rotation shaft 3 penetrates the hollow structure of positioning pin 1 and is used for being connected with the bottom of positioning hole with screw thread.

[0041] Drive machine 5 is fixedly installed, and drive machine 5 can adopt motor, and drive machine 5 is used to drive drive seat 6 to rotate, and drive seat 6 is rotatably connected on fixed seat 7 by bearing, and rotation shaft 3 is axially slidably connected on drive seat 6, and specifically, strip-shaped sliding slot is set on the large diameter section of rotation shaft 3, and sliding pin is fixed on drive seat 6 and is used to slide in strip-shaped sliding slot.

[0042] Fixed seat 7 is fixedly installed, and nut 81 is screw-connected in the inner hole of fixed seat 7, and nut 81 and cone sleeve 82 are coaxial with rotation shaft 3, and nut 81 is screw-connected in fixed seat 7, and cone sleeve 82 is matched with the taper surface of nut 81, and cone sleeve 82 is axially slidably connected on the large diameter section of rotation shaft 3;Large diameter section of rotation shaft 3 is also fixed with blocking piece 32, and blocking piece 32 is used to abut with the small size end surface of cone sleeve 82, and blocking piece 32 is located on the both sides of nut 81 with positioning pin 1, and blocking piece 32 is used to abut with drive seat 6.

[0043] Limiting nail is fixed on the inner wall of nut 81, and isolating ring 84 is arranged between limiting nail and the large size end surface of cone sleeve 82, and the large size end surface of cone sleeve 82 is provided with containing hole, and the elastic piece 83 that nut 81 is resisted on cone sleeve 82 includes sliding body and spring connected on sliding body, and spring is located in containing hole, and spring is used to push sliding body outward to abut with the end surface of isolating ring 84, and sliding body is spherical in the embodiment.

[0044] In addition, in the embodiment, in order to avoid the shaft 3 from being stuck without rotating, a driving sleeve 51 is arranged between the driving machine 5 and the driving base 6, the driving machine 5 drives the driving sleeve 51 to rotate, a belt transmission connection is adopted between the output shaft of the driving machine 5 and the driving sleeve 51, the driving sleeve 51 is communicated with the driving base 6 through the elastic assembly 61, the elastic assembly 61 includes the spring 612 which extends radially and the connecting piece 611 which is connected to the end of the spring 612, the connecting piece 611 is provided with a spherical surface, the spherical surface of the connecting piece 611 is located at the joint of the driving sleeve 51 and the driving base 6, the driving base 6 and the driving sleeve 51 are both provided with the accommodating groove 600 for accommodating the spherical surface of the connecting piece 611, the spring 612 and the connecting piece 611 can be squeezed into the same accommodating groove 600; specifically, the connecting piece 611 is a metal ball, the number of the elastic assembly 61 is at least two, all the elastic assemblies 61 are uniformly distributed about the driving base 6, and in the embodiment, the spring 612 of the elastic assembly 61 is located in the accommodating groove 600 in the driving base 6.

[0045] When the embodiment is adopted, the driving sleeve 51 is driven to rotate by the rotation of the driving machine 5, after the driving sleeve 51 rotates, the rotating power is transmitted to the driving base 6 through the elastic assembly 61, after the driving base 6 rotates, the shaft 3 is driven to rotate, the taper sleeve 82 which is sleeved on the shaft 3 rotates, the taper sleeve 82 is resisted by the elastic piece 83 on the nut 81, so that the nut 81 and the taper sleeve 82 rotate as a whole, the rotation of the nut 81 is along the fixed base 7, so that the nut 81, the taper sleeve 82 and the shaft 3 form a whole to realize the rotation and movement, that is, the shaft 3 realizes the variable rotation and movement, in this action, the positioning pin 1 in the positioning device and the shaft 3 continuously approach the positioning hole, the small-diameter section of the shaft 3 is gradually inserted into the bottom of the positioning hole in the rotating and moving mode, and the positioning pin 1 is also inserted into the positioning hole.

[0046] When the nut 81 moves to the end of the stroke and no longer rotates, if the driving machine 5 still outputs the rotation, the shaft 3 continues to rotate due to the threaded connection with the bottom of the positioning hole, and the taper sleeve 82 also continues to rotate with the shaft 3, at this time, the taper sleeve 82 idles relative to the nut 81, so as to ensure that the whole transmission assembly will not be stuck, and when the shaft 3, the taper sleeve 82 and the nut 81 form a whole and no longer rotate, at this time, the elastic assembly 61 plays a role, the connecting piece 611 on the elastic assembly 61 moves into the accommodating groove 600 of the driving base 6, so that the driving sleeve 51 idles relative to the driving base 6, and the whole transmission assembly is also ensured not to be stuck due to overload.

[0047] Embodiment two

[0048] To avoid the excessive wear of the nut 81 and the taper sleeve 82 caused by the friction when the taper sleeve 82 rotates relative to the nut 81, a displacement limiting structure is arranged between the taper sleeve 82 and the rotating shaft 3. The displacement limiting structure comprises a displacement limiting groove 86 and a displacement limiting pin 85. The displacement limiting pin 85 slides in the displacement limiting groove 86. The displacement limiting groove 86 is axially parallel to the rotating shaft 3. One of the displacement limiting groove 86 and the displacement limiting pin 85 is arranged on the large diameter section of the rotating shaft 3, and the other is arranged on the inner surface of the taper sleeve 82.

[0049] In combination Figure 4 The displacement limiting pin 85 is fixed on the large diameter section of the rotating shaft 3, and the displacement limiting groove 86 is arranged on the inner hole wall of the taper sleeve 82. When the nut 81 moves to the end of the stroke on the side close to the positioning hole of the fixed seat 7, the nut 81 no longer continues to rotate and move, but the rotating shaft 3 continues to rotate and move (at this time, the rotating shaft 3 has been inserted into the bottom of the positioning hole). The displacement limiting pin 85 abuts against the groove wall of the displacement limiting groove 86 on the side close to the positioning hole, and pushes the taper sleeve 82 to continue to rotate and move with the rotating shaft 3 against the elastic force of the elastic member 83. The taper sleeve 82 will be separated from the nut 81, thereby ensuring that the rotating shaft 3 continues to move in the direction of the positioning hole to ensure that the expansion block 4 can expand the elastic block 11, and there will be no excessive friction between the taper sleeve 82 and the nut 81, which helps to improve the service life of the two.

[0050] In combination Figure 5 The displacement limiting pin 85 is fixed on the inner hole wall of the taper sleeve 82, and the displacement limiting groove 86 is arranged on the large diameter section of the rotating shaft 3. The groove wall of the displacement limiting groove 86 away from the positioning hole can abut against the displacement limiting pin 85 when the rotating shaft 3 continues to rotate and move and the nut 81 no longer moves, thereby pushing the taper sleeve 82 to rotate and move synchronously with the rotating shaft 3 against the elastic force of the elastic member 83 and separate from the nut 81, reducing the degree of friction on the taper surface and improving the service life of the taper sleeve 82 and the nut 81.

[0051] Embodiment three

[0052] In combination Figures 6 to 8 The embodiment provides a positioning device, which comprises the transmission assembly for realizing the rotation and movement of the rotating shaft in the embodiment one or the embodiment two, and further comprises a positioning pin 1, a positioning seat 2 and an expansion block 4.

[0053] The positioning pin 1 is movable and is used for being inserted into a conical positioning hole of a positioned member 10, and comprises an integral cylindrical section and a conical section. The conical section of the positioning pin 1 is matched with the positioning hole in a taper surface. The cylindrical section of the positioning pin 1 is integrally processed with a plurality of elastic blocks 11. The plurality of elastic blocks 11 are uniformly distributed in the circumferential direction of the positioning pin 1. The elastic blocks 11 can abut against the inner wall of the guide hole after being expanded outward. The positioning pin 1 is in a hollow structure, and the positioning pin 1 is sleeved on the small diameter section of the rotating shaft 3 (the positioning pin 1 is matched with the rotating shaft 3 in a gap). A limiting stop piece 31 is fixed on the medium diameter section of the rotating shaft 3. The limiting stop piece 31 is a limiting snap ring which is detachably connected to the rotating shaft 3.

[0054] Positioning seat 2: fixedly installed, and a guide hole is formed, the positioning pin 1 is slidably connected in the guide hole, and the elastic block 11 can abut against the inner wall of the guide hole after being expanded by the expansion block 4;

[0055] Expansion block 4: sleeved on the middle diameter section of the rotating shaft 3, the expansion block 4 is located between the limiting stop 31 and the large diameter section of the rotating shaft 3, and can be wedge surface / conical surface matched with the elastic block 11, and the specific embodiment is conical surface matched, that is, the expansion block 4 is an expansion cone, and the expansion block 4 is located in the enclosed area of the plurality of elastic blocks 11, and after the expansion block 4 expands the elastic block 11, the elastic block 11 abuts against the guide hole. The end of the expansion block 4 away from the positioning hole is in a stepped shape, a limiting ring 41 is sleeved on the step of the expansion block 4, a limiting insertion rod 12 is fixed to the inner side surface of the free end of the elastic block 11, the limiting insertion rod 12 faces the rotating shaft 3, and the limiting insertion rod 12 is used to abut against the end surface of the limiting ring 41.

[0056] The expansion block 4 and the positioning pin 1 are prevented from rotating relative to each other by the guide groove 13 and the guide column 42, the guide groove 13 is axially parallel to the rotating shaft 3, the guide column 42 is inserted into the guide groove 13, one of the guide groove 13 and the guide column 42 is arranged on the expansion block 4, and the other is arranged on the positioning pin 1, in the embodiment, the guide column 42 is fixed on the expansion block 4, and the guide groove 13 is formed on one of the elastic blocks 11 or the adjacent two elastic sheets.

[0057] When the embodiment is adopted, the rotating shaft 3 drives the positioning pin 1 to be inserted into the positioning hole while rotating and moving, after the positioning pin 1 contacts the positioning hole, the rotating shaft 3 continues to rotate and move, so that the expansion block 4 is pushed by the stepped surface of the rotating shaft 3 to expand the elastic block 11, the elastic block 11 is expanded with the guide hole, and the gap between the positioning pin 1 and the guide hole is eliminated, so that the positioning precision is ensured.

[0058] In addition, the elastic block 11 is tightly fitted with the guide hole in the positioning seat 2 under the expansion of the expansion block 4, so that the outwardly extending positioning pin 1 and the positioning seat 2 form an integral whole, the positioning stability after positioning is greatly improved, and it is ensured that the positioning device will not rebound. Even if the positioned part 10 is vibrated by external force, the positioning precision of the positioning device will not be affected.

[0059] The above only is the embodiment of the present application, and the well-known specific technical solutions and / or common knowledge in the scheme are not described in detail. It should be pointed out that, for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A drive assembly for effecting a pivot and slide movement of a pivot, comprising a pivot, characterized in that: The drive seat is used for rotation, the rotating shaft is axially slidably connected to the drive seat, the fixed seat is fixedly installed, and the nut is threadedly connected in the inner hole of the fixed seat.

2. The transmission assembly of claim 1, wherein: The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft.

3. The transmission assembly of claim 2, wherein: The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft.

4. The transmission assembly of claim 3, wherein: The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft.

5. The transmission assembly of claim 2, wherein: The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft.

6. The transmission assembly of claim 2, wherein: The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft.

7. The transmission assembly of claim 2, wherein: The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft.

8. A positioning device comprising a positioning pin, characterized in that The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft.

9. A positioning device according to claim 8, characterized in that: The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft.

10. A positioning device according to claim 9, characterized in that: The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. 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The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating shaft, and the nut is used for rotating with the rotating shaft. The nut is installed on the rotating shaft and coaxial with the rotating

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