阅读说明：本技术 一种拉钉动作装置 (Rivet actuating device ) 是由 杨超 岳明强 王锦华 于 2021-10-27 设计创作，主要内容包括：本发明公开了一种拉钉动作装置,设置有拉钉和拉杆,拉钉的一端设置有用于连接夹具的螺纹头,拉钉的另一端设置有卡接结构,拉杆与拉钉同轴分布,且拉杆靠近拉钉的一端设置有供拉钉插入的装配腔,拉杆于装配腔内对应卡接结构设置有锁紧结构,锁紧结构能够闭合卡接结构而锁紧拉钉或者与卡接结构分离而解除对拉钉的锁紧。采用上述结构设置的本发明,能够通过拉钉安装夹具,通过拉杆上的锁紧结构配合卡接结构锁紧拉钉,机床只需要控制拉杆向后拉即可拉紧夹具,在需要拆卸夹具的时候,只需要解锁锁紧结构,即可将拉钉和夹具一同拆下,可以实现夹具的快装、快换,拆卸的时候无需工人去到机床末端,可以解决传统结构的不足。(The invention discloses a blind rivet actuating device which is provided with a blind rivet and a pull rod, wherein one end of the blind rivet is provided with a threaded head for connecting a clamp, the other end of the blind rivet is provided with a clamping structure, the pull rod and the blind rivet are coaxially distributed, one end of the pull rod, which is close to the blind rivet, is provided with an assembly cavity for the insertion of the blind rivet, the pull rod is provided with a locking structure corresponding to the clamping structure in the assembly cavity, and the locking structure can close the clamping structure to lock the blind rivet or can be separated from the clamping structure to release the locking of the blind rivet. According to the invention with the structure, the clamp can be installed through the blind rivet, the blind rivet can be locked through the locking structure on the pull rod and the clamping structure, the clamp can be tensioned only by controlling the pull rod to pull backwards, when the clamp needs to be disassembled, the blind rivet and the clamp can be disassembled together only by unlocking the locking structure, the clamp can be quickly assembled and quickly replaced, a worker does not need to go to the tail end of the machine tool during disassembly, and the defects of the traditional structure can be overcome.)

1. The utility model provides a blind rivet action device, its characterized in that is provided with blind rivet and pull rod, the one end of blind rivet is provided with the thread head that is used for coupling fixture, the other end of blind rivet is provided with the joint structure, the pull rod with the coaxial distribution of blind rivet, just the pull rod is close to the one end of blind rivet is provided with the confession blind rivet male assembly chamber, the pull rod in the assembly intracavity corresponds the joint structure is provided with locking structure, locking structure can be closed joint structure and locking blind rivet or with the separation of joint structure and release right the locking of blind rivet, the assembly chamber corresponds the tip of blind rivet is provided with ejecting structure, ejecting structure is used for when the blind rivet inserts to target in place to outside thrust is applyed to the blind rivet.

2. The blind rivet actuating device according to claim 1, wherein the locking structure includes a limiting portion capable of being adjusted along the radial movement of the blind rivet and a locking portion corresponding to the axial movement of the blind rivet, the limiting portion can be abutted against the clamping structure or separated from the clamping structure in the process of being adjusted along the radial movement of the blind rivet, the locking portion can enter a movement adjusting path of the limiting portion in the process of being adjusted along the axial movement of the blind rivet, so that the limiting portion is fixed in a state of being abutted against the clamping structure in a closed state, or the limiting portion is withdrawn from the movement adjusting path, thereby enabling the limiting portion to be separated from the clamping structure.

3. The blind rivet actuating device of claim 2, wherein the pull rod is provided with a reset structure and an adjusting structure corresponding to the locking portion, the reset structure is used for keeping the locking portion in a state of entering a movement adjusting path of the limiting portion in a normal state, and the adjusting structure is used for controlling the locking portion to exit the movement adjusting path of the limiting portion against the action of the reset structure.

4. The blind rivet actuating device of claim 3, wherein the limiting portion comprises a plurality of steel balls uniformly arranged around the periphery of the blind rivet, and the clamping structure comprises a clamping groove formed in the surface of the blind rivet.

5. The blind rivet actuating device according to claim 4, wherein a steel ball limiting seat is provided in the assembly cavity, one end of the steel ball limiting seat close to the blind rivet has an annular portion adapted to the blind rivet, a plurality of limiting grooves are provided on the side of the annular portion in one-to-one correspondence with the steel ball, the limiting grooves penetrate the annular portion, the width of the proximal end of the limiting groove is smaller than the width of the distal end of the limiting groove and is smaller than the diameter of the steel ball, and the steel ball is assembled in the limiting grooves.

6. The blind rivet actuating device according to claim 5, wherein the locking portion includes a piston portion sleeved outside the annular portion, the piston portion is adjustable along the axial movement of the blind rivet, convex portions and concave portions are arranged on the inner side surface of the piston portion along the axial direction of the blind rivet, the piston portion is capable of limiting the steel ball in a state of partially protruding from the proximal end of the limiting groove when moving to the position where the convex portions align with the limiting groove, and a space for the steel ball to exit from the limiting groove to the inner side of the annular portion is formed when moving to the position where the concave portions align with the limiting groove.

7. The blind rivet actuating device as recited in claim 6, wherein the pull rod is provided with a piston chamber on a peripheral side of the annular portion, the piston portion is slidably mounted in the piston chamber, the return structure includes a plurality of return springs disposed uniformly around the blind rivet, one end of each return spring abuts against an end of the piston portion near the protruding portion, and the other end abuts against an end of the piston chamber, so as to maintain the piston portion to normally maintain the protruding portion aligned with the retaining groove.

8. The blind rivet actuation apparatus of claim 7, wherein the adjustment structure includes an air intake system connected to the other end of the piston chamber opposite the return spring, the air intake system being configured to move the piston portion by compressed air to align the recess with the retaining groove.

9. A blind rivet actuation device according to claim 8, wherein the ejection structure has a circumference adapted to the assembly cavity for abutting the steel ball while the blind rivet is separated from the steel ball.

Technical Field

The invention relates to a numerical control machine tool, in particular to a blind rivet actuating device capable of tensioning, locking and loosening a clamp, a workpiece or a tool.

Background

For numerically controlled machine tools, the automatic tightening and loosening mechanism of the spindle clamp is very important, and is an important part for quickly replacing and disassembling the spindle clamp and realizing the installation stability of the spindle clamp.

The structure of the currently adopted tightening and loosening mechanism of the spindle clamp is shown in fig. 5, a clamp 110, a first pull rod 111, a belleville spring 112, a pull rod sleeve 116, an air cylinder 115 and a nut 113 are installed in a machine tool spindle 114, wherein the first pull rod 111 is connected with a threaded hole on the clamp 110 into a whole through threads, the nut 113 connects the first pull rod 111 with the pull rod sleeve 116 together, and the nut 113 on the first pull rod 111 is pushed to move rightwards through the pushing force of the belleville spring 112 acting on the pull rod sleeve 116, so as to generate a backward pulling force on the first pull rod 111 and tighten the clamp 110; when the clamp is released, the piston acts leftwards through the air cylinder 115 to generate forward thrust on the pull rod sleeve 116, so that the first pull rod 111 is pushed forwards, and the clamp 110 is released. However, this structure has the following problems:

1. when the clamp 110 of the machine tool is to be disassembled and assembled, the nut 113 needs to be loosened from the right end (namely, the cylinder end) of the machine tool spindle 114;

2. the first pull rod 111 is relatively long and is easy to deform, and during installation, it is very difficult for the first pull rod 111 to enter the threaded hole at the right end of the fixture 110, and the force borne by the nut 113 is relatively large, so that the nut 113 may be screwed more and more tightly along with the high-speed rotation of the machine tool spindle 114, which is not beneficial to subsequent disassembly.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a blind rivet actuating device which can solve the problem that a clamp is difficult to disassemble.

According to the embodiment of the invention, the blind rivet actuating device is provided with a blind rivet and a pull rod, one end of the blind rivet is provided with a threaded head for connecting a clamp, the other end of the blind rivet is provided with a clamping structure, the pull rod and the blind rivet are coaxially distributed, one end of the pull rod close to the blind rivet is provided with an assembly cavity for the blind rivet to be inserted into, the pull rod is provided with a locking structure corresponding to the clamping structure in the assembly cavity, and the locking structure can close the clamping structure to lock the blind rivet or separate from the clamping structure to release the locking of the blind rivet.

According to the embodiment of the invention, at least the following technical effects are achieved:

according to the invention with the structure, the clamp can be installed through the blind rivet, the blind rivet can be locked through the locking structure on the pull rod and the clamping structure, the clamp can be tensioned only by controlling the pull rod to pull backwards by the machine tool, and when the clamp needs to be disassembled, the blind rivet and the clamp can be disassembled together only by unlocking the locking structure, so that the quick assembly and quick replacement of the clamp can be realized, and the defects of the traditional structure are overcome.

According to some embodiments of the invention, the locking structure comprises a limiting part capable of moving and adjusting along the radial direction of the blind rivet and a locking part capable of moving and adjusting along the axial direction of the blind rivet corresponding to the limiting part, the limiting part can be in butt joint with or separated from the clamping structure in the process of moving and adjusting along the radial direction of the blind rivet, and the locking part can enter a moving and adjusting path of the limiting part in the process of moving and adjusting along the axial direction of the blind rivet, so that the limiting part is fixed in a state of being in butt joint with the clamping structure in a closed state, or quit the moving and adjusting path of the limiting part, and the limiting part can be separated from the clamping structure.

According to some embodiments of the invention, the pull rod is provided with a reset structure and an adjusting structure corresponding to the locking part, the reset structure is used for keeping the locking part in a state of entering a movement adjusting path of the limiting part under a normal state, and the adjusting structure is used for controlling the locking part to exit the movement adjusting path of the limiting part under the action of the reset structure.

According to some embodiments of the invention, the limiting part comprises a plurality of steel balls uniformly arranged around the circumference of the blind rivet, and the clamping structure comprises a clamping groove formed in the surface of the blind rivet.

According to some embodiments of the invention, a steel ball limiting seat is arranged in the assembly cavity, one end of the steel ball limiting seat close to the blind rivet is provided with an annular part matched with the blind rivet, a plurality of limiting grooves are arranged on the periphery of the annular part in one-to-one correspondence to the steel balls, the limiting grooves penetrate through the annular part, the width of the proximal end of each limiting groove is smaller than that of the distal end of each limiting groove, the diameter of each limiting groove is smaller than that of the steel ball, and the steel ball is assembled in the limiting grooves.

According to some embodiments of the invention, the locking part comprises a piston part sleeved outside the annular part, the piston part can move and adjust along the axial direction of the rivet, the inner side surface of the piston part is provided with a convex part and a concave part along the axial direction of the rivet, the piston part can limit the steel ball to be in a state of partially protruding from the proximal end of the limiting groove when moving until the convex part is aligned with the limiting groove, and a space for the steel ball to exit from the limiting groove to the inner side of the annular part can be formed when moving until the concave part is aligned with the limiting groove.

According to some embodiments of the invention, the pull rod is provided with a piston cavity on the periphery side of the annular portion, the piston portion is slidably mounted in the piston cavity, the return structure comprises a plurality of return springs uniformly arranged around the pull stud, one end of each return spring abuts against the end portion, close to the convex portion, of the piston portion, and the other end of each return spring abuts against the end portion of the piston cavity, so as to keep the piston portion aligned with the limiting groove under the normal state.

According to some embodiments of the invention, the adjustment structure comprises an air inlet system connected to the other end of the piston chamber opposite to the return spring, the air inlet system being adapted to move the piston part by pushing compressed air such that the recess is aligned with the limiting groove.

According to some embodiments of the invention, the fitting cavity is provided with an ejection structure corresponding to an end of the pull stud for applying an outward pushing force to the pull stud when the pull stud is inserted into position.

According to some embodiments of the invention, the push-out structure has a circumference adapted to the assembly cavity for abutting the steel ball while the pull stud is separated from the steel ball.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of an overall structure of the present invention;

FIG. 2 is an enlarged view of a portion of the present invention;

FIG. 3 is a schematic view of the present invention with the blind rivet detached;

FIG. 4 is a schematic structural view of a steel ball retainer;

fig. 5 is a schematic diagram of a conventional structure.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 5, the invention provides a blind rivet actuating device, which is provided with a blind rivet 100 and a pull rod 300, wherein one end of the blind rivet 100 is provided with a threaded head 101 for connecting a clamp, the other end of the blind rivet 100 is provided with a clamping structure, the pull rod 300 and the blind rivet 100 are coaxially distributed, one end of the pull rod 300 close to the blind rivet 100 is provided with an assembly cavity for inserting the blind rivet 100, the pull rod 300 is provided with a locking structure corresponding to the clamping structure in the assembly cavity, and the locking structure can close the clamping structure to lock the blind rivet 100 or separate from the clamping structure to release the locking of the blind rivet 100.

According to the invention with the structure, the clamp can be installed through the blind rivet 100, the blind rivet 100 can be locked through the locking structure on the pull rod 300 matched with the clamping structure, the clamp can be tightened only by controlling the pull rod 300 to pull backwards by a machine tool, when the clamp needs to be disassembled, the blind rivet 100 and the clamp can be disassembled together only by unlocking the locking structure, the quick assembly and quick replacement of the clamp can be realized, a worker does not need to go to the tail end of the machine tool during the disassembly, and the defects of the traditional structure can be overcome.

In some embodiments of the present invention, the locking structure includes a position-limiting portion capable of moving and adjusting along a radial direction of the blind rivet 100 and a locking portion corresponding to the position-limiting portion and capable of moving and adjusting along an axial direction of the blind rivet 100, the position-limiting portion can be abutted against or separated from the clamping structure during the radial movement and adjustment along the radial direction of the blind rivet 100, and the locking portion can enter a movement adjusting path of the position-limiting portion to fix the position-limiting portion in a state of abutting against and closing with the clamping structure during the axial movement and adjustment along the axial direction of the blind rivet 100, or exit the movement adjusting path of the position-limiting portion to enable the position-limiting portion to be separated from the clamping structure. With the structure arrangement of the embodiment, during operation, only the locking part needs to be controlled to move along the axial direction of the blind rivet 100, so that the unlocking state and the locking state of the locking structure can be switched.

In order to simplify the control structure, in some embodiments of the present invention, the pull rod 300 is provided with a reset structure and an adjusting structure corresponding to the locking portion, the reset structure is used for keeping the locking portion in a state of entering the movement adjusting path of the limiting portion in a normal state, and the adjusting structure is used for controlling the locking portion to exit the movement adjusting path of the limiting portion against the action of the reset structure.

The structure setting of this embodiment of adoption can be through the structure effect that resets for locking portion is in the outside state of withdrawing from of spacing portion of locking, keeps and joint structure complex state under the normal state, because operating time proportion is great, goes on when spacing portion's separation is only used for dismantling anchor clamps, consequently so set up and can ensure operating condition down pull rod 300 to the locking of blind rivet 100, prevents that blind rivet 100 from deviating from.

When the blind rivet 100 needs to be disassembled, the locking part is controlled to exit from the moving path of the limiting part only by overcoming the action of the reset structure through the adjusting structure, so that the limiting part can move outwards.

In order to facilitate the outward movement of the limiting part and the separation of the clamping structure, the specific structural form between the limiting part and the clamping structure preferably adopts the structure that when the blind rivet 100 is pulled outward along the axial direction, the radial outward thrust can be applied to the limiting part, so that the smooth separation is realized.

In some embodiments of the present invention, the limiting portion comprises a plurality of steel balls 700 uniformly arranged around the circumference of the blind rivet 100, and the clamping structure comprises a clamping groove 102 opened on the surface of the blind rivet 100. The structural arrangement of this embodiment is adopted, the limiting part is set as the steel ball 700, when the blind rivet 100 is pulled out outwards along the axial direction, the external shape structure of the steel ball 700 can be utilized to form an acting force for pushing the steel ball 700 outwards when the side wall of the clamping groove 102 abuts against the steel ball 700, the separation of the steel ball 700 and the clamping groove 102 is smoothly realized, after the steel ball 700 exits from the clamping groove 102, the blind rivet 100 can be pulled out smoothly, and the whole disassembly of the clamp and the blind rivet 100 is completed.

When the blind rivet 100 is installed, the locking part is controlled to exit from a path of the steel ball 700 in the radial motion through the adjusting structure, the blind rivet 100 is inserted into the assembling cavity, when the end part of the blind rivet 100 is abutted to the steel ball 700, radial thrust can be formed based on the shape of the steel ball 700 to push the steel ball 700 open, so that the blind rivet can smoothly enter, when the blind rivet 100 is installed in place, the effect of the adjusting structure is cancelled, the steel ball 700 falls into the clamping groove 102 under the effect of the resetting structure, the locking part can automatically lock the steel ball 700, the steel ball 700 is prevented from exiting, and the blind rivet 100 is locked.

In some embodiments of the present invention, a steel ball retaining seat 600 is disposed in the assembly cavity, one end of the steel ball retaining seat 600 close to the blind rivet 100 along the axial direction of the blind rivet 100 has an annular portion 601 adapted to the blind rivet 100, a plurality of retaining grooves are disposed around the annular portion 601 in one-to-one correspondence with the steel balls 700, the retaining grooves penetrate the annular portion 601, the width of the proximal end of each retaining groove is smaller than the width of the distal end and smaller than the diameter of the steel ball 700, and the steel ball 700 is fitted in the retaining grooves. By adopting the structural arrangement of the embodiment, the position of the steel ball 700 can be limited by the steel ball limiting seat 600, the influence of the movement of the steel ball 700 on the locking effect and the stress condition during locking is avoided, and the balance and stability of the locking force applied to the blind rivet 100 can be ensured. And the arrangement of the limiting groove can prevent the steel ball 700 from being separated from the annular part 601 when the blind rivet 100 is drawn out, which is beneficial to ensuring the smooth operation.

In some embodiments of the present invention, the locking portion includes a piston portion 400 sleeved outside the annular portion 601, the piston portion 400 is capable of moving and adjusting along the axial direction of the rivet 100, the inner side surface of the piston portion 400 is provided with protrusions 401 and recesses along the axial direction of the rivet 100, the piston portion 400 is capable of limiting the steel ball 700 in a state of partially protruding from the proximal end of the limiting groove when moving until the protrusions 401 are aligned with the limiting groove, and is capable of forming a space for the steel ball 700 to exit from the limiting groove to the inner side of the annular portion 601 when moving until the recesses are aligned with the limiting groove. By adopting the structure of the embodiment, all the steel balls 700 distributed in the circumferential direction can be simultaneously controlled by the piston part 400, and the simultaneous locking and simultaneous unlocking of all the steel balls 700 are realized. And the locking part adopts a piston form, so that the control precision is higher, the control is easier, and the smooth operation is ensured. The structural form of the concave part and the convex part 401 in this embodiment can be flexibly set according to the need, for example, one convex part 401 is provided for each steel ball 700, or the convex part 401 is provided as a convex ring structure for all the steel balls 700.

It can be understood that due to the structural form of the steel ball 700, when the position of the convex part 401 adjacent to the concave part is in a right-angle form, an inward extrusion force can be formed on the steel ball 700, and the piston part 400 is not blocked basically.

In some embodiments of the present invention, the pull rod 300 is provided with a piston cavity on the periphery of the annular portion 601, the piston portion 400 is slidably mounted in the piston cavity, the return structure includes a plurality of return springs 500 uniformly arranged around the blind rivet 100, one end of each return spring 500 abuts against the end of the piston portion 400 close to the convex portion 401, and the other end abuts against the end of the piston cavity, so as to control the piston portion 400 to keep the convex portion 401 aligned with the limiting groove under normal conditions. With the structure of the present embodiment, the piston 400 can keep the protrusion 401 in contact with the steel ball 700 under normal conditions by the action of the return spring 500, so as to limit the steel ball 700 in a state of partially protruding from the proximal end of the limiting groove. And a plurality of return springs 500 are uniformly arranged in the circumferential direction, so that the piston part 400 can be uniformly stressed and the return reaction is rapid.

In some embodiments of the present invention, the adjustment structure includes an air intake system connected to the other end of the piston chamber opposite to the return spring 500 for moving the piston part 400 by compressed air such that the recess is aligned with the stopper groove. By adopting the structural arrangement of the embodiment, when the locking of the piston part 400 to the steel ball 700 needs to be released, only compressed air needs to be sent through the air inlet system, the piston part 400 is pushed to overcome the acting force of the return spring 500 until the piston part exits from the outer side of the steel ball 700, and the concave part is aligned with the steel ball 700. When the steel ball 700 needs to be locked again, the air inlet system is deflated, and the return spring 500 can push the piston part 400 to return, so that the convex part 401 limits the steel ball 700 in the limiting groove again.

It will be appreciated that to ensure gas tightness, a sealing ring may be provided between the piston portion 400 and the surface of the piston cavity.

In some embodiments of the invention, the fitting cavity is provided with a push-out structure corresponding to the end of the blind rivet 100, the push-out structure being used to apply an outward pushing force to the blind rivet 100 when the blind rivet 100 is inserted into place. The structure setting of this embodiment of adoption can reduce the dismantlement degree of difficulty of blind rivet 100 to can eliminate the fit-up gap of blind rivet 100 through the thrust of ejecting structure, be favorable to guaranteeing the stability of blind rivet 100 when high-speed rotation in the course of the work.

In some embodiments of the invention, the circumference of the ejection structure is adapted to the assembly cavity for abutting steel ball 700 while blind rivet 100 is separated from steel ball 700. By adopting the structural arrangement of the embodiment, the steel ball 700 is prevented from entering the assembly cavity after the blind rivet 100 is drawn out by limiting the inner side of the steel ball 700 through the push-out structure, the steel ball 700 only falls into the clamping groove 102 when the blind rivet 100 is inserted in place so that the clamping groove 102 is aligned with the steel ball 700, and the steel ball 700 is in the insertion cavity for withdrawing the blind rivet 100 at other times. The push-out structure in this embodiment combines with the arrangement of the limiting groove in the previous embodiment, so as to effectively prevent the steel ball 700 from sinking into the insertion area of the blind rivet 100. In addition, the push-out structure in this embodiment can limit the position of the steel ball 700 from the inner side after the steel ball 700 is withdrawn, so that the steel ball 700 limits the piston part 400 without the need of continuous operation of the intake system.

It will be appreciated that due to the retention of ball 700 by the ejection structure, ball 700 cannot fall into the insertion region of blind rivet 100, thus eliminating the need to limit the width of the proximal end of the retention slot.

In some embodiments of the invention, the ejection structure comprises a sliding sleeve 800 and a central spring 801, the sliding sleeve 800 being slidably mounted inside the annular portion 601 with the head facing the blind stud 100, the central spring 801 abutting the sliding sleeve 800 at one end and the fitting cavity at the other end. Wherein, one end of the center spring 801 abutting against the sliding sleeve 800 extends into the sliding sleeve 800, thereby ensuring the assembling stability of the sliding sleeve 800 and the center spring 801 and the response timeliness of the center spring 801 pushing the sliding sleeve 800.

Referring to fig. 1 to 4, in some embodiments of the present invention, the blind rivet actuating device is provided with a blind rivet 100, a flange cover 200, a piston part 400, a steel ball 700, a pull rod 300, a steel ball retainer 600, a return spring 500, a center spring 801, and a sliding sleeve 800. Wherein the left end of pull rod 300 is provided with cylindrical cavity structure, and steel ball spacing seat 600 is the ring structure, and steel ball spacing seat 600 is installed in cylindrical cavity structure's right-hand member, and a plurality of spacing grooves have evenly been seted up to steel ball spacing seat 600's left end, and the left end opening of spacing groove sets up, pierces through the lateral wall of steel ball spacing seat 600 along cylindrical cavity structure's radial direction simultaneously. The width of the proximal end of the limiting groove is smaller than the diameter of the steel ball 700, so that the steel ball 700 cannot be separated from the proximal end, and meanwhile, the width of the distal end of the limiting groove is larger than the diameter of the steel ball 700. The flange cover 200 is fixedly installed at the left end of the pull rod 300 and compresses and fixes the steel ball limiting seat 600 in the cylindrical chamber structure. The peripheral dimension of the left part of the steel ball limiting seat 600 and the peripheral dimension of the right part of the flange cover 200 are smaller than the peripheral dimension of the cylindrical chamber structure, so that a piston cavity is formed on the peripheral sides of the left part of the steel ball limiting seat 600 and the right part of the flange cover 200. The piston part 400 is of an annular structure and is slidably mounted in the piston cavity, a circle of convex ring is arranged on the inner side wall of the right end of the piston part 400 corresponding to the limiting groove, a concave position is naturally formed on the left side of the convex ring, and a step between the convex ring and the concave position is of an inclined surface structure as shown in the figure. Reset spring 500 is provided with a plurality ofly, and a plurality of spring mounting holes 602 are seted up to circumference on the step that forms the position in piston chamber on the spacing seat 600 of steel ball, and reset spring 500 places one by one in spring mounting hole 602, and reset spring 500 left end butt piston portion 400. The inner side wall and the outer side wall of the piston part 400 are both provided with a sealing ring. An air passage 301 is arranged in the pull rod 300, one end of the air passage 301 is communicated with the left end of the piston cavity, and the other end of the air passage 301 extends to the right end of the pull rod 300. The right-hand member position of the inner wall of the steel ball limiting seat 600 is provided with a limiting step, and the sliding sleeve 800 is slidably mounted at the center of the steel ball limiting seat 600 and limits the sliding stroke through the limiting step. The left end of the center spring 801 is installed in the sliding sleeve 800, and the right end abuts against the right end of the cylindrical chamber structure. The sliding sleeve 800 can move to the left end of the limiting groove under the action of the central spring 801 in a natural state. The steel balls 700 are installed in the limit grooves in one-to-one correspondence with the limit grooves. When the convex ring is aligned with the steel ball 700, the inner side of the steel ball 700 protrudes from the proximal end of the limiting groove, and when the concave position is aligned with the steel ball 700, the steel ball 700 can completely exit from the proximal end of the limiting groove. The left end of the blind rivet 100 is provided with a thread head 101 for connecting a fixture, the peripheral side wall of the right end is provided with a clamping groove 102, and two side walls of the clamping groove 102 are both of inclined surface structures shown in the figure.

By adopting the embodiment with the structure, when the fixture is to be installed, the screw head 101 at the left end of the blind rivet 100 is assembled with the fixture, and then the blind rivet 100 is pushed in from the flange cover 200, at this time, the sliding sleeve 800 is at the left end of the sliding stroke and in a state of ejecting the steel ball 700, and at this time, the piston part 400 is at the right end of the piston cavity under the limiting action of the steel ball 700. When the blind rivet 100 is inserted, the sliding sleeve 800 is pushed by the right end, after the blind rivet is inserted in place, the clamping groove 102 is aligned with the steel ball 700, the piston part 400 slides leftwards under the action of the return spring 500, the steel ball 700 is completely pressed into the limiting groove, and the blind rivet 100 is locked. The clamp can be tensioned and installed only by tensioning the pull rod 300 through a machine tool. During this locking process, the locking mechanism of the blind rivet 100 is reliable because the steel ball 700 cannot move outward.

When the clamp is disassembled, compressed air is fed into the air channel 301, the piston part 400 is controlled to move rightwards, locking of the steel ball 700 is released, the clamp is pulled outwards, the rivet 100 is pulled out along with the clamp towards the left side in the same direction in combination with the action of the central spring 801, in the process, the steel ball 700 is ejected out, and when the rivet 100 is pulled out of the position of the steel ball 700, the sliding sleeve 800 is abutted to the steel ball 700 along with matching, so that the steel ball 700 at the upper end is prevented from falling under the action of gravity, and after the compressed air of the air channel 301 is removed, the piston part 400 cannot press down the steel ball 700, so that the air supply state does not need to be kept for a long time.

In summary, the structural arrangement of the present invention has the following advantages:

1. the clamp can be disassembled and assembled at the machine tool operation position;

2. the structure length of the tensioning clamp is shortened, and the stability is higher;

3. the situation that the nut locking structure is screwed more and more tightly can not occur, and the disassembly and the assembly are convenient.

In addition, it is understood that the structural design of the present invention is not only suitable for tightening and loosening the spindle clamp, but also suitable for tightening and loosening the workpiece spindle or tightening and loosening other tools.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.