Clamping device and spinning machine

Abstract

The present invention discloses a clamping device, which comprises a frame, a spindle box, a jaw, a moving seat and a driving mechanism. A hollow rotating spindle arranged in the left-right direction is rotatably installed in the spindle box. The jaw is movably installed at one end of the rotating spindle and can rotate along with the rotating spindle. The moving seat is provided with a pull rod movably passing through the rotating spindle and connected with the jaw. The moving seat can move relative to the frame and drive the pull rod to drive the jaw to move out of or retract into the rotating spindle. The driving mechanism is arranged on the frame, and is in transmission connection with the moving seat and can drive the moving seat to move relative to the frame. By arranging the moving seat, during the use process, the driving mechanism does not need to rotate together with the rotating spindle, thereby reducing the risk of leakage and damage of the driving mechanism, being not only convenient for cleaning, but also capable of prolonging the service life of the clamping device. In addition, the present invention also provides a spinning machine with the above clamping device.

Description

Technical Field

[0001] The present invention relates to the technical field of spinning machines, and in particular to a clamping device and a spinning machine. Background Art

[0002] At present, pipe fittings or cylindrical products can generally be processed by spinning machines. The spinning machine is provided with a clamping device for clamping the workpiece, and the clamping device can drive the workpiece to rotate along with the main shaft. The clamping device of the prior art generally includes a cylinder and a clamping jaw, and the cylinder can drive the clamping jaw to clamp and fix the workpiece. However, when the spinning machine is working, the cylinder will also rotate along with the main shaft. Long-term rotational movement can easily lead to problems such as oil leakage in the cylinder, which is not only inconvenient to clean, but also easily leads to a reduction in the clamping force of the clamping jaw, and even causes the clamping device to fail, affecting the service life of the clamping device and thus affecting the normal operation of the spinning machine. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a clamping device that is easy to clean and can extend the service life of the clamping device.

[0004] The present invention also provides a spinning machine having the clamping device.

[0005] According to an embodiment of the present invention, the clamping device includes: a frame; a spindle box installed on the frame, wherein a hollow rotating spindle arranged along the left and right directions is rotatably installed in the spindle box; a clamping jaw movably installed at one end of the rotating spindle and capable of rotating with the rotating spindle, wherein the clamping jaw is at least partially located in the rotating spindle, and the clamping jaw can be extended from the rotating spindle and expanded outward along the axial movement of the rotating spindle, or the clamping jaw can be retracted into the rotating spindle and closed inward along the axial movement of the rotating spindle; a movable seat movably arranged on the frame and located on one side of the spindle box, wherein the movable seat is provided with a pull rod movably passed through the rotating spindle and connected to the clamping jaw, wherein the movable seat can move relative to the frame and drive the pull rod to drive the clamping jaw to move, extend or retract the rotating spindle. A driving mechanism is arranged on the frame, wherein the driving mechanism is transmission-connected to the movable seat and can drive the movable seat to move back and forth relative to the frame along the left and right directions.

[0006] The clamping device according to the embodiment of the present invention has at least the following beneficial effects:

[0007] By providing a movable base with a pull rod extending through the rotating spindle and connected to the clamping jaws, a drive mechanism can drive the movable base and the pull rod relative to the frame, thereby driving the clamping jaws to extend or retract along the rotating spindle, thereby clamping and releasing the workpiece. As a result, during use of the clamping device, the drive mechanism does not need to rotate with the rotating spindle, thereby reducing the risk of leakage and damage to the drive mechanism, facilitating cleaning, and extending the service life of the clamping device.

[0008] According to some embodiments of the present invention, the driving mechanism is connected to the movable seat via a connecting rod transmission, the driving mechanism is installed below the movable seat, the first end of the connecting rod is rotatably connected to the movable seat, and the second end of the connecting rod is rotatably connected to the output end of the driving mechanism; the driving mechanism can drive the second end to move back and forth in the up and down directions, and drive the first end to move back and forth in the left and right directions.

[0009] According to some embodiments of the present invention, the frame is provided with a first slide rail arranged in the up and down direction, the first slide rail is movably mounted with a first slide seat, the first slide seat is connected to the output end of the driving mechanism, and the second end of the connecting rod is rotatably mounted on the first slide seat.

[0010] According to some embodiments of the present invention, the rack is provided with a second slide rail arranged in a left-right direction, and the movable seat is movably mounted on the second slide rail and can reciprocate along the second slide rail.

[0011] According to some embodiments of the present invention, the driving mechanism is a cylinder.

[0012] According to some embodiments of the present invention, the clamp includes a guide sleeve, one end of which is connected to the pull rod, and the other end is provided with at least two elastic chucks, and the outer wall of each elastic chuck is provided with a conical surface for guiding; when the elastic chuck is located outside the rotating spindle, the elastic chuck remains in an outwardly opened state, and a clamping space for clamping the workpiece is formed between all the elastic chucks; when the pull rod drives the guide sleeve and drives all the elastic chucks to move toward the inside of the rotating spindle, the inner wall of the rotating spindle squeezes the conical surface and makes all the elastic chucks close to each other.

[0013] According to some embodiments of the present invention, a push rod is further provided on one side of the spindle box, and the push rod is movably passed through the pull rod and the guide sleeve, and the push rod can move along the guide sleeve into and out of the clamping space.

[0014] According to some embodiments of the present invention, at least one bearing is sleeved on the outer peripheral wall of the pull rod, and all of the bearings are fixedly connected to the movable seat.

[0015] According to some embodiments of the present invention, a motor is provided on the frame, one end of the rotary main shaft is connected with a pulley, the pulley is in belt transmission connection with the motor, and the motor can drive the pulley and drive the rotary main shaft to rotate relative to the frame.

[0016] The spinning machine according to the embodiment of the present invention is provided with the clamping device of any one of the above embodiments.

[0017] The spinning machine according to the embodiment of the present invention has at least the following beneficial effects:

[0018] By providing the clamping device of any one of the above embodiments, during use, the driving mechanism does not need to rotate together with the rotary main shaft, thereby reducing the risk of leakage and damage of the driving mechanism, facilitating cleaning, and extending the service life of the clamping device. It can not only facilitate cleaning, but also extend the service life of the clamping device, and further extend the service life of the spinning machine.

[0019] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0021] Figure 1 is a schematic diagram of the clamping device according to the embodiment of the present invention;

[0022] Figure 2 is Figure 1 a specific structural schematic diagram of the shown clamping device;

[0023] Figure 3 is Figure 2 a partial schematic diagram of the shown clamping device;

[0024] Figure 4 is Figure 2 a partial schematic diagram of another perspective of the shown clamping device;

[0025] Figure 5 is Figure 3 a cross-sectional schematic diagram of the shown clamping device;

[0026] Figure 6 is a schematic diagram of the jaw according to the embodiment of the present invention;

[0027] Figure 7 is a schematic diagram of the spinning machine according to the embodiment of the present invention.

[0028] Reference numerals:

[0029] Frame 100, headstock 110, rotating main shaft 111, jaw 120, guide sleeve 121, collet 122, moving seat 130, pull rod 131, drive mechanism 140, connecting rod 141, first slide rail 150, first slide block 151, second slide rail 160, second slide block 161, ejector rod 170, motor 180, pulley 190. Detailed implementation manners

[0030] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0032] In the description of the present invention, the meaning of "a number of" is one or more, the meaning of "a plurality of" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0034] Refer to Figures 1 to 5One embodiment of the present invention provides a clamping device, including a frame 100, a spindle box 110, a clamping jaw 120, a movable seat 130 and a driving mechanism 140. The spindle box 110 is mounted on the frame 100, and a hollow rotating spindle 111 arranged in the left and right directions is rotatably mounted in the spindle box 110. The clamping jaw 120 is movably mounted on one end of the rotating spindle 111 and can rotate with the rotating spindle 111. The clamping jaw 120 is at least partially located in the rotating spindle 111, and the clamping jaw 120 can move along the axial direction of the rotating spindle 111 to extend out of the rotating spindle 111 and expand outward, or the clamping jaw 120 can move along the axial direction of the rotating spindle 111 to retract into the rotating spindle 111 and close inward. The movable base 130 is movably mounted on the frame 100 and is located on one side of the spindle box 110. The movable base 130 is provided with a pull rod 131 that is movably mounted within the rotating spindle 111 and connected to the clamping jaw 120. The movable base 130 can move relative to the frame 100 and drive the pull rod 131 to move the clamping jaw 120 to extend or retract the rotating spindle 111. The driving mechanism 140 is disposed on the frame 100 and is in transmission connection with the movable base 130 and can drive the movable base 130 to reciprocate in the left and right directions relative to the frame 100.

[0035] In the above structure, the jaws 120 are at least partially located within the rotating spindle 111. When the jaws 120 are retracted and inwardly moved along the axial direction of the rotating spindle 111, they can clamp the workpiece. When the jaws 120 are extended and outwardly moved along the axial direction of the rotating spindle 111, they can release the workpiece. Specifically, "inward retraction" refers to the jaws 120 being retracted toward the axis of the rotating spindle 111, while "outward expansion" refers to the jaws 120 being expanded away from the axis of the rotating spindle 111. By setting up a movable seat 130, a pull rod 131 that is movably inserted into the rotating spindle 111 and connected to the clamping jaw 120 is provided in the movable seat 130, and the driving mechanism 140 can drive the movable seat 130 and drive the pull rod 131 to move relative to the frame 100, thereby driving the clamping jaw 120 to move along the rotating spindle 111 to extend or retract the rotating spindle 111, thereby achieving the clamping and loosening of the workpiece by the clamping jaw 120. Compared with the traditional oil cylinder that needs to rotate with the rotating spindle 111 and is prone to problems such as oil leakage, inconvenient to clean and affecting the normal use of the clamping device, the clamping device provided in this embodiment does not need to rotate with the rotating spindle 111 during use, thereby reducing the risk of leakage and damage to the driving mechanism 140, which is not only convenient for cleaning but also can extend the service life of the clamping device.

[0036] Reference Figures 1 to 5In some embodiments, the drive mechanism 140 is installed below the movable base 130. The drive mechanism 140 and the movable base 130 are connected by a connecting rod 141. The connecting rod 141 has a first end and a second end. The first end of the connecting rod 141 is rotatably connected to the movable base 130, and the second end of the connecting rod 141 is rotatably connected to the output end of the drive mechanism 140. The drive mechanism 140 can drive the second end of the connecting rod 141 to move back and forth in the vertical direction, and can also drive the second end of the connecting rod 141 to move back and forth in the left and right direction. As a result, the second end of the connecting rod 141 can push the movable base 130 to move back and forth in the left and right direction, thereby driving the clamping jaws 120 to move along the rotating spindle 111, extending or retracting the rotating spindle 111, thereby enabling the clamping jaws 120 to clamp and release the workpiece. By installing the drive mechanism 140 below the movable base 130, space can be saved to a certain extent, space utilization can be improved, and the structure of the clamping device can be made more compact.

[0037] It can be understood that the connecting rod 141 has a first end and a second end. Specifically, the first end and the second end can be arranged opposite to each other.

[0038] It can be understood that the frame 100 is provided with a mounting plate for mounting the driving mechanism 140 , and the driving mechanism 140 is mounted on the mounting plate.

[0039] Reference Figures 1 to 5 In some embodiments, the frame 100 is provided with a first slide rail 150 arranged in the up and down direction, and the first slide rail 150 is movably mounted with a first slide seat 151, the first slide seat 151 is connected to the output end of the driving mechanism 140, and the second end of the connecting rod 141 is rotatably mounted on the first slide seat 151.

[0040] In the above structure, the drive mechanism 140 is rotatably connected to the second end of the connecting rod 141 via the first slide 151. The first slide rail 150 is arranged in the vertical direction, allowing the first slide 151 to reciprocate only in the vertical direction, thereby causing the second end of the connecting rod 141 to reciprocate in the vertical direction. The arrangement of the first slide rail 150 and the first slide 151 prevents the second end of the connecting rod 141 from deviating during movement, which could affect the normal operation of the clamping device.

[0041] It can be understood that the second end of the connecting rod 141 is rotatably connected to the first slide 151. Specifically, the first slide 151 is provided with a first connecting seat, and the second end of the connecting rod 141 is hinged to the first connecting seat through a pin.

[0042] It can be understood that the first end of the connecting rod 141 is rotatably connected to the movable seat 130. Specifically, the movable seat 130 is provided with a second connecting seat, and the first end of the connecting rod 141 is hinged to the second connecting seat through a pin.

[0043] ReferenceFigures 1 to 5 In some embodiments, the frame 100 is provided with a second slide rail 160 arranged in the left - right direction, and the moving seat 130 is movably mounted on the second slide rail 160 and can reciprocate along the second slide rail 160.

[0044] In the above structure, the setting of the second slide rail 160 can ensure that the moving seat 130 reciprocates in the left - right direction, preventing the moving seat 130 from shifting during movement and affecting the normal operation of the clamping device.

[0045] It can be understood that the moving seat 130 is movably mounted on the second slide rail 160. Specifically, a second slide block 161 may be movably mounted on the second slide rail 160, and the second slide block 161 can reciprocate along the second slide rail 160, and the moving seat 130 is mounted on the second slide rail 160. Of course, in addition, the moving seat 130 can also be directly movably mounted on the second slide rail 160, and the present invention does not make specific limitations on this.

[0046] It can be understood that in some embodiments, the driving mechanism 140 may specifically be a cylinder. The cylinder has the advantages of simple maintenance, not easily blocked pipelines, and being easy to clean. Of course, in addition to being a cylinder, the driving mechanism 140 can also be a hydraulic cylinder or an electric push rod, etc., and the present invention does not make specific limitations on this.

[0047] Referring to Figure 5 and Figure 6 In some embodiments, the jaw 120 includes a guide sleeve 121. One end of the guide sleeve 121 is connected to the pull rod 131, and the other end is provided with three elastic chucks 122. The outer wall of each elastic chuck 122 is provided with a tapered surface for guiding. When the elastic chucks 122 are located outside the rotating main shaft 111, the elastic chucks 122 remain in an outward - opening state, and a clamping space for clamping the workpiece is formed between all the elastic chucks 122. When the pull rod 131 drives the guide sleeve 121 and drives all the elastic chucks 122 to move towards the inside of the rotating main shaft 111, the inner wall of the rotating main shaft 111 presses the tapered surface and causes all the elastic chucks 122 to approach and converge with each other.

[0048] In the above structure, the movable seat 130 can drive the guide sleeve 121 to reciprocate along the axial direction of the rotating spindle 111 through the pull rod 131, thereby driving all the elastic collets 122 to extend or retract into the rotating spindle 111. When the elastic collets 122 are located outside the rotating spindle 111, the elastic collets 122 remain in an outwardly open state, that is, all the elastic collets 122 expand in a direction away from the axis of the rotating spindle 111, and a clamping space for clamping a workpiece is formed between all the elastic collets 122. At this time, the workpiece can be inserted into the clamping space or the workpiece in the clamping space can be removed. When all the elastic collets 122 move toward the interior of the rotating spindle 111, the inner wall of the rotating spindle 111 abuts against the tapered surface of the elastic collet 122 and generates an extrusion force, thereby causing all the elastic collets 122 to move closer to each other, that is, all the elastic collets 122 are retracted in a direction close to the axis of the rotating spindle 111, thereby enabling all the elastic collets 122 to cooperate in clamping the workpiece.

[0049] It can be understood that the outer wall of the elastic collet 122 is provided with a tapered surface. Specifically, the elastic collet 122 is arranged at the right end of the rotating spindle 111, and the outer diameter of the left end of the tapered surface is smaller than the outer diameter of the right end of the tapered surface. The inner diameter of the rotating spindle 111 should be between the minimum outer diameter and the maximum outer diameter of the tapered surface. As a result, when all the elastic collets 122 are retracted into the rotating spindle 111, an extrusion pressure can be generated on the outer wall of the elastic collet 122, thereby causing all the elastic collets 122 to retract inward to cooperate in clamping the workpiece.

[0050] It is understandable that the outer wall of the elastic clamp 122 is provided with a tapered surface. Specifically, the elastic clamp 122 is provided at the right end of the rotating spindle 111, and the outer walls of all the elastic clamps 122 can enclose a conical surface that is larger on the right and smaller on the left.

[0051] It can be understood that when the elastic collet 122 is arranged at the right end of the rotating spindle 111, the inner wall of the rotating spindle 111 can be set to a conical surface with a larger right side and a smaller left side, so that the inner wall of the rotating spindle 111 can better fit with the outer wall of the elastic collet 122, avoiding point contact between the inner wall of the rotating spindle 111 and the outer wall of the elastic collet 122, which is easy to cause wear to the elastic collet 122 and the rotating spindle 111 during long-term use.

[0052] It is understandable that the number of the elastic clamps 122 may be three, two, four or more, and the present invention does not impose any specific limitation on this. It only needs to ensure that the number of the elastic clamps 122 is at least two.

[0053] Reference Figures 1 to 6, in some embodiments, a ejector rod 170 is further provided on one side of the headstock 110. The ejector rod 170 movably passes through the drawbar 131 and the guide sleeve 121, and the ejector rod 170 can move in and out of the clamping space along the guide sleeve 121. Thus, when it is necessary to remove the workpiece from the jaw 120, the driving mechanism 140 drives all the elastic chucks 122 to extend out of the rotating spindle 111, and the ejector rod 170 can move in and out of the clamping space along the guide sleeve 121, so that the workpiece can be ejected from the clamping space. Therefore, the setting of the ejector rod 170 facilitates the removal of the workpiece.

[0054] It can be understood that the drawbar 131 is specifically a hollow rod, and the drawbar 131 is coaxially arranged with the guide sleeve 121, so that the ejector rod 170 can movably pass through the drawbar 131 and the guide sleeve 121 and can move in and out of the clamping space along the guide sleeve 121.

[0055] Refer to Figures 1 to 5 , in some embodiments, two bearings are sleeved on the outer wall of the drawbar 131, and each bearing is fixedly connected to the moving seat 130.

[0056] In the above structure, a drawbar 131 that passes through the rotating spindle 111 and is connected to the jaw 120 is arranged in the moving seat 130. The moving seat 130 can move relative to the frame 100 and drive the jaw 120 to move out or retract from the rotating spindle 111 through the drawbar 131. The setting of the bearings facilitates the rotation of the drawbar 131 following the rotating spindle 111, while preventing the moving seat 130 from rotating following the rotating spindle 111. Thus, the moving seat 130 can drive the jaw 120 to reciprocate axially along the rotating spindle 111 through the drawbar 131, and at the same time, the jaw 120 and the drawbar 131 can rotate following the rotating spindle 111.

[0057] It can be understood that the number of bearings can be one, three or more in addition to two, and the present invention does not make specific limitations on this.

[0058] It can be understood that the bearings can specifically be thrust bearings. Of course, in addition, other types of bearings can also be selected for the bearings, and the present invention does not make specific limitations on this.

[0059] It can be understood that, in addition to avoiding the rotation of the moving seat 130 following the rotating main shaft 111 by setting a bearing between the pull rod 131 and the moving seat 130, it can also be achieved by other structures. For example, an annular groove can be formed in the moving seat 130, and the pull rod 131 is provided with an annular protrusion adapted to the annular groove. The annular protrusion is defined within the annular groove and can rotate relative to the moving seat 130, whereby the moving seat 130 can drive the jaw 120 to reciprocate axially along the rotating main shaft 111 through the pull rod 131, and at the same time, the jaw 120 and the pull rod 131 can rotate with the rotating main shaft 111. Of course, in addition to this, other structures can also be adopted, and the present invention does not make specific limitations thereto.

[0060] Referring to Figures 1 to 5 , in some embodiments, the frame 100 is provided with a motor 180. One end of the rotating main shaft 111 is connected with a pulley 190, and the pulley 190 is in belt drive connection with the motor 180. The motor 180 can drive the pulley 190 and drive the rotating main shaft 111 to rotate relative to the frame 100.

[0061] In the above structure, the belt is used to realize the transmission connection between the pulley 190 and the motor 180, and then drive the rotating main shaft 111 to rotate relative to the frame 100, which can facilitate the rotation of the rotating main shaft 111 and make the rotation of the rotating main shaft 111 more stable.

[0062] Referring to Figure 7 , an embodiment of the present invention further provides a spinning machine, and the spinning machine is provided with the clamping device of any one of the above embodiments.

[0063] By setting the clamping device of any one of the above embodiments, during use, the driving mechanism 140 does not need to rotate together with the rotating main shaft 111, and thus the risk of leakage and damage of the driving mechanism 140 can be reduced, which is convenient for cleaning and can extend the service life of the clamping device. It is not only convenient for cleaning, but also can extend the service life of the clamping device, and thus can extend the service life of the spinning machine.

[0064] The above has described the embodiments of the present invention in detail with reference to the drawings, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. Clamping device, characterized in that, Comprising: A frame (100); A headstock (110) mounted on the frame (100), and a hollow rotating spindle (111) arranged in the headstock (110) and rotatingly installed along the left - right direction; A jaw (120) movably installed at one end of the rotating spindle (111) and capable of rotating with the rotating spindle (111). At least part of the jaw (120) is located inside the rotating spindle (111), and the jaw (120) can axially move along the rotating spindle (111) to extend out of the rotating spindle (111) and expand outward, or the jaw (120) can axially move along the rotating spindle (111) to retract into the rotating spindle (111) and close inward; A moving seat (130) movably arranged on the frame (100) and located on one side of the headstock (110). The moving seat (130) is provided with a pull rod (131) movably penetrating through the rotating spindle (111) and connected to the jaw (120). The moving seat (130) can move relative to the frame (100) and drive the pull rod (131) to drive the jaw (120) to move out of or retract into the rotating spindle (111); A driving mechanism (140) arranged on the frame (100), the driving mechanism (140) is in transmission connection with the moving seat (130) and can drive the moving seat (130) to reciprocally move along the left - right direction relative to the frame (100); The driving mechanism (140) is in transmission connection with the moving seat (130) through a connecting rod (141). The driving mechanism (140) is installed below the moving seat (130). The first end of the connecting rod (141) is rotatably connected to the moving seat (130), and the second end of the connecting rod (141) is rotatably connected to the output end of the driving mechanism (140); The driving mechanism (140) can drive the second end to reciprocally move along the up - down direction and drive the first end to reciprocally move along the left - right direction; The jaw (120) includes a guide sleeve (121). One end of the guide sleeve (121) is connected to the pull rod (131), and the other end is provided with at least two elastic chucks (122). The outer wall of each elastic chuck (122) is provided with a tapered surface for guiding; When the elastic chucks (122) are located outside the rotating spindle (111), the elastic chucks (122) remain in an outwardly open state, and a clamping space for clamping a workpiece is formed between all the elastic chucks (122); When the pull rod (131) drives the guide sleeve (121) and drives all the elastic chucks (122) to move into the interior of the rotating spindle (111), the inner wall of the rotating spindle (111) presses against the tapered surface and causes all the elastic chucks (122) to approach and close to each other; On one side of the main spindle box (110), a ejector rod (170) is further provided. The ejector rod (170) movably passes through the pull rod (131) and the guide sleeve (121), and the ejector rod (170) can move in and out of the clamping space along the guide sleeve (121).

2. The clamping device according to claim 1, characterized in that, The machine frame (100) is provided with a first slide rail (150) arranged in the up and down direction. The first slide rail (150) is movably installed with a first slide block (151). The first slide block (151) is connected to the output end of the driving mechanism (140), and the second end of the connecting rod (141) is rotatably installed on the first slide block (151).

3. The clamping device according to claim 1, wherein, The machine frame (100) is provided with a second slide rail (160) arranged in the left and right direction. The moving seat (130) is movably installed on the second slide rail (160) and can reciprocate along the second slide rail (160).

4. The clamping device according to any one of claims 1 to 3, characterized in that The driving mechanism (140) is a cylinder.

5. The clamping device according to claim 1, characterized in that, At least one bearing is sleeved on the outer peripheral wall of the pull rod (131), and all the bearings are fixedly connected to the moving seat (130).

6. The clamping device according to claim 1, wherein, The machine frame (100) is provided with a motor (180). One end of the rotating main shaft (111) is connected with a belt pulley (190). The belt pulley (190) is in belt transmission connection with the motor (180), and the motor (180) can drive the belt pulley (190) and drive the rotating main shaft (111) to rotate relative to the machine frame (100).

7. A spinning machine, characterized in that, A clamping device as described in any one of claims 1 to 6 is provided.

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