Locking device for cutter workpiece

Abstract

The utility model discloses a cutter workpiece locking device which comprises a shell, an output shaft is fixedly arranged in the shell, a shaft sleeve is arranged in the output shaft in a sliding mode, a locking pin used for locking a workpiece is arranged at the lower end of the shaft sleeve in a clamping mode, a screw rod is arranged at the upper end of the shaft sleeve, and the screw rod penetrates out of the upper end of the output shaft to be arranged outside the shell. The screw is sleeved with a spring, the two ends of the spring make contact with the screw and the output shaft respectively, a trigger is arranged at the upper end of the shell, and one end of the trigger makes contact with the outwards-extending end of the screw all the time and is used for driving the screw to move. A transmission mode of linkage of a cam structure and a sliding structure is adopted, a trigger is pulled to drive an eccentric cam to rotate, and the cam rotates to drive a screw to slide to realize movement of a shaft sleeve; and meanwhile, the steel ball is additionally arranged at the tail end of the shaft sleeve, a step-shaped inclined surface structure is utilized, so that the steel ball moves at the step to change the position to mechanically lock the upper end of the locking pin, the locking mode is simple and firm, and the locking and dismounting operations of the locking pin are simple.

Description

Technical Field

[0001] The utility model belongs to the technical field of tooling fixtures, and particularly relates to a locking device for a tool workpiece. Background Art

[0002] At present, on machine tools, various machining centers, and various cutting tools, most of the installations of tools adopt bolts or three-jaw chucks for locking connections. However, when replacing tools, for tool workpieces fixed with bolts or screws, the screws / bolts need to be removed before replacement, and the screws / bolts still need to be screwed in again after replacement, which is troublesome and time-consuming. Three-jaw chucks are mostly used in large machining machine tools, with large volume, heavy weight, and high manufacturing cost, and cannot be used in some portable tools.

[0003] Therefore, both the methods of fixing tool workpieces with screws and with chucks have certain defects. In view of the above problems, it is urgent to design a simple and efficient locking device to quickly realize the locking and disassembly of tool workpieces. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a locking device for a tool workpiece to solve the technical problems raised in the above background art. The following technical solutions are provided: A locking device for a tool workpiece, comprising:

[0005] A housing, which has an installation cavity inside. An output shaft is fixedly arranged inside the housing. A shaft sleeve is slidably arranged inside the output shaft. A locking pin for locking the workpiece is clamped at the lower end of the shaft sleeve. A screw rod is arranged at the upper end of the shaft sleeve. The screw rod passes through the upper end of the output shaft and is placed outside the housing. A spring is sleeved on the screw rod. The two ends of the spring are respectively in contact with the screw rod and the output shaft. A trigger is arranged at the upper end of the housing. One end of the trigger is always in contact with the extended end of the screw rod for driving the screw rod to move.

[0006] In this technical solution, when performing the locking operation of the tool workpiece, first manually pull the trigger. While pulling the trigger, the lower end of the trigger presses against the upper end of the screw rod, forcing the screw rod to slide along the output shaft. The upper end of the shaft sleeve is pushed by the screw rod and thus slides along the axis of the output shaft to the lower end of the output shaft. When sliding to the lower end of the output shaft, the shaft sleeve releases the locking pin;

[0007] At this time, remove the locking pin, install the tool, and then put it back to the original position. Reset the trigger. Under the elastic force of the spring, the screw rod and the shaft sleeve move upward. During the upward movement of the shaft sleeve, the upper end of the locking pin is clamped, thereby realizing the locking of the tool.

[0008] In any of the above technical solutions, further, a through hole is arranged inside the output shaft. The two ends of the through hole are respectively communicated with the outside. And a step is arranged inside the through hole. And a fixing buckle is arranged at the outer ring end of the output shaft. The fixing buckle is fixedly arranged on the end wall of the installation cavity.

[0009] A positioning disk is provided at the lower end of the output shaft, and positioning protrusions are evenly provided on the lower surface of the positioning disk;

[0010] The bushing is slidably arranged inside the through hole, and steel balls are provided at the lower end of the bushing.

[0011] A spherical lock head is provided at the upper end of the locking pin. The spherical lock head contacts and clamps with the steel ball. A clamping disk is also provided at the lower end of the locking pin, and the clamping disk contacts and clamps the bottom of the tool workpiece.

[0012] In this technical solution, a step is provided at the middle position of the through hole. The cross section of the step is in the shape of a stepped surface with an inclined plane, resulting in a change in the diameter of the through hole at this position. The diameter of the chamber at the upper end of the step is smaller than that at the lower end of the chamber. The steel ball is embedded on the lower side of the bushing and can move within a small range at its installation position (the steel ball does not fall off from the bushing during the movement process). The positioning disk and the clamping disk are closely abutted to realize the clamping of the tool, and the positioning protrusions are used for the positioning and installation of the tool.

[0013] For the disassembly and locking of the locking pin, its principle is realized by using an inclined plane structure, and the principle is as follows:

[0014] 1. When the bushing and the steel ball at its lower end slide to the lower end of the step, since the diameter of the lower chamber of the through hole is large, at this time the steel ball extends outward along the radius direction of the bushing, and the steel ball does not contact the spherical lock head. At this time, the device does not lock the locking pin, so the locking pin can be removed from the bushing. And during the whole process of taking out the locking pin, the position of the screw rod moves downward, and the compression spring is compressed during this process.

[0015] 2. After removing the locking pin and sleeving and installing the tool above it, insert the locking pin back into the bushing. At this time, pull the trigger to reset it. The screw rod is reset under the action of the spring force, pulling the bushing and the steel ball to move upward. When the steel ball moves to the upper end of the step, since the cross section of the step is in the shape of a stepped surface with an inclined plane, one side of the steel ball contacts the inclined plane, forcing the steel ball to move towards the inside of the bushing. And as the diameter of the upper end of the through hole decreases, finally the steel ball moves inward to contact and lock the lower ball part of the spherical lock head, completing the locking of the locking pin.

[0016] In any of the above technical solutions, further, the upper end of the bushing is threadedly connected to the screw rod. A retaining ring is sleeved on the upper end of the screw rod. One end of the spring in a compressed state abuts against the retaining ring, and the other end abuts against the upper end of the output shaft.

[0017] In this technical solution, the diameter of the spring is larger than the upper end of the screw rod. In order to ensure that the spring can stably produce a jacking and resetting effect on the upper end of the screw rod, a retaining ring is sleeved on the upper end of the screw rod.

[0018] In any of the above technical solutions, further, the trigger includes:

[0019] The rib plate is provided with a cylindrical pin, and an eccentric cam is rotatably arranged on the cylindrical pin. One side of the eccentric cam always abuts against the upper end of the screw rod, and a handle is arranged at one end of the eccentric cam.

[0020] In this technical solution, the pressing of the screw rod is completely realized by the trigger. The linkage between the trigger and the screw rod is realized by the structure of the linkage between the eccentric cam mechanism and the sliding rod mechanism. When the screw rod is pressed down, the actual profile of the eccentric cam always contacts the upper end of the screw rod.

[0021] 1. When the handle is moved, it drives the eccentric cam to rotate clockwise. The actual profile at the lower end of the eccentric cam contacts the upper end of the screw rod and presses it down. During the process of the screw rod being pressed down, the spring is compressed; at this time, the sleeve fixed at the lower end of the screw rod slides in the middle of the output shaft, so as to ensure that the locking pin can be removed from the sleeve.

[0022] 2. When it is necessary to install and lock the locking pin again, just rotate the eccentric cam counterclockwise to reset it.

[0023] Since one end of the actual profile of the eccentric cam always contacts the screw rod during the rotation process, and the contact point is dynamically changing, the distance between the contact point and the rotation center of the cam changes, so as to realize the pressing of the eccentric cam on the screw rod to different degrees.

[0024] The installation position of the eccentric cam, the axis position of the eccentric cam, and the selection of the rotation direction are selected according to the actual production parameters and the parameters of different springs and screw rods. The present utility model does not limit this. And the function of the spring is to drive the screw rod to reset. The change in the installation position of the spring caused by using a tension spring and a compression spring is not limited by the present utility model, and is also regarded as a technical solution that can be adopted by the present utility model.

[0025] The beneficial effects of the present utility model are as follows: Adopting the transmission mode of the linkage between the cam structure and the sliding structure, by pulling the trigger to drive the eccentric cam to rotate, the cam drives the screw rod to slide along the output shaft, thereby driving the sleeve to move; at the same time, by adding steel balls at the end of the sleeve and using the stepped inclined plane structure, the movement position change of the steel balls at the steps realizes the mechanical locking of the upper end of the locking pin. The locking method is simple and reliable, and the locking and disassembly operations of the locking pin are simple. Description of the Drawings

[0026] Figure 1 is the external view schematic diagram of the present utility model;

[0027] Figure 2 is the internal structure schematic diagram of the present utility model;

[0028] Figure 3 is Figure 2 the schematic diagram at A-A in

[0029] Figure 4 It is a schematic structural diagram when 30 and 50 are disassembled;

[0030] Figure 5 It is a schematic structural diagram when 30 and 50 are locked;

[0031] Figure 6 It is a partial explosion diagram of the present utility model;

[0032] Figure 7 It is an installation schematic diagram of 20 in the present utility model. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the present application.

[0034] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, rather than intending to limit the exemplary embodiments according to the present application. For the convenience of description, the dimensions of each part shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0035] As Figures 1-3 shown, this embodiment provides a locking device for a tool workpiece, which includes:

[0036] A housing 10, which is internally provided with an installation cavity 12. An output shaft 20 is fixedly provided inside the housing 10. A shaft sleeve 30 is slidably provided inside the output shaft 20. A locking pin 50 for locking the workpiece is clamped at the lower end of the shaft sleeve 30. A screw rod 40 is provided at the upper end of the shaft sleeve 30. The screw rod 40 passes through the upper end of the output shaft 20 and is placed outside. A spring 60 is sleeved on the screw rod 40. The two ends of the spring 60 are respectively in contact with the screw rod 40 and the output shaft 20. A trigger 70 is provided at the upper end of the housing 10. One end of the trigger 70 is always in contact with the outer extending end of the screw rod 40 for driving the screw rod 40 to move.

[0037] In this technical solution, when performing the locking operation of the tool and workpiece, first manually pull the trigger 70. While pulling the trigger 70, the lower end presses against the upper end of the screw 40, forcing the screw 40 to slide along the output shaft 20. The upper end of the bushing 30 is pushed by the screw 40 and thus slides along the axis of the output shaft 20 to the lower end of the output shaft 20. When sliding to the lower end of the output shaft 20, the bushing 30 releases the locking pin 50;

[0038] At this time, remove the locking pin 50, install it into the tool, and then put it back in place. Reset the trigger 70. Under the elastic force of the spring 60, the screw 40 and the bushing 30 move upward. During the upward movement of the bushing 30, the upper end of the locking pin 50 is clamped, thereby realizing the locking of the tool.

[0039] Embodiment 2:

[0040] As Figures 4-7 shown, specifically, a through hole 21 is provided inside the output shaft 20, a step 22 is provided inside the through hole 21, and a fixing buckle 25 is provided at the outer ring end of the output shaft 20. The fixing buckle 25 is fixedly arranged on the end wall of the installation cavity 12.

[0041] A positioning disk 23 is provided at the lower end of the output shaft 20, and positioning protrusions 24 are evenly provided on the lower surface of the positioning disk 23;

[0042] The bushing 30 is slidably arranged inside the through hole 21, and a steel ball 31 is provided at the lower end of the bushing 30.

[0043] A spherical lock head 51 is provided at the upper end of the locking pin 50. The spherical lock head 51 is in contact with and clamped by the steel ball 31. A clamping disk 52 is further provided at the lower end of the locking pin 50, and the clamping disk 52 contacts and clamps the bottom of the tool and workpiece.

[0044] In this technical solution, a step 22 is provided at the middle position of the through hole 21. The cross section of the step 22 is in the shape of an inclined step, resulting in a change in the diameter of the through hole 21 at this position. The diameter of the chamber at the upper end of the step 22 is smaller than the diameter of the chamber at the lower end. The steel ball 31 is embedded on the lower side of the bushing 30 and can move within a small range at its installation position (the steel ball 31 does not fall off from the bushing 30 during the movement). The positioning disk 23 and the clamping disk 52 are closely abutted to realize the clamping of the tool, and the positioning protrusions 24 are used for the positioning and installation of the tool.

[0045] For the disassembly and locking of the locking pin 50, its principle is realized by using an inclined plane structure, and the principle is as follows:

[0046] 1. When the bushing 30 and the steel ball 31 at its lower end slide to the lower end of the step 22, since the diameter of the lower chamber of the through hole 21 is large, at this time the steel ball 31 extends outward in the radial direction of the bushing 30, and the steel ball 31 does not contact the spherical lock head 51. At this time, the device does not lock the locking pin 50, so the locking pin 50 can be removed from the bushing 30. And during the whole process of removing the locking pin 50, the position of the screw 40 moves downward, and the compression spring 60 is compressed during this process.

[0047] 2. After removing the locking pin 50 and installing a cutting tool over it, insert the locking pin 50 back into the bushing 30. At this time, move the trigger 70 to reset it. The screw 40 resets under the action of the elastic force of the spring 60, pulling the bushing 30 and the steel ball 31 upward. When the steel ball 31 moves to the upper end of the step 22, since the cross-section of the step 22 is in the shape of an inclined step, one side of the steel ball 31 contacts the inclined surface, forcing the steel ball 31 to move inward into the bushing 30. And as the diameter of the upper end of the through hole 21 decreases, finally the steel ball 31 moves inward to contact and lock the lower ball part of the spherical lock head 51, completing the locking of the locking pin 50.

[0048] Embodiment 3:

[0049] As Figure 6 shown, specifically, the upper end of the bushing 30 is threadedly connected to the screw 40. A retaining ring 41 is sleeved on the upper end of the screw 40. One end of the compression spring 60 abuts against the retaining ring 41, and the other end abuts against the upper end of the output shaft 20.

[0050] In this technical solution, the diameter of the spring 60 is larger than the upper end of the screw 40. In order to ensure that the spring 60 can stably produce a jacking and resetting effect on the upper end of the screw 40, a retaining ring 41 is sleeved on the upper end of the screw 40.

[0051] Embodiment 4

[0052] As Figure 2 、 3 shown, specifically, the trigger 70 includes:

[0053] A rib plate 11. A cylindrical pin 73 is provided on the rib plate 11. An eccentric cam 71 is rotatably provided on the cylindrical pin 73. One side of the eccentric cam 71 always abuts against the upper end of the screw 40, and a handle 72 is provided at one end of the eccentric cam 71.

[0054] In this technical solution, the pressing of the screw 40 is completely realized by relying on the trigger 70. The linkage between the trigger 70 and the screw 40 is realized by a structure that combines an eccentric cam mechanism and a slide bar mechanism. When the screw 40 is pressed down, the actual profile of the eccentric cam 71 always contacts the upper end of the screw 40.

[0055] 1. When the handle 72 is moved, it drives the eccentric cam 71 to rotate clockwise. The lower actual profile of the eccentric cam 71 contacts the upper end of the screw 40 and presses it downwards. During the downward pressing of the screw 40, the spring 60 is compressed; at this time, the bushing 30 fixed to the lower end of the screw 40 slides in the middle of the output shaft 20, so as to ensure that the locking pin 50 can be removed from the bushing 30.

[0056] 2. When it is necessary to reinstall and lock the locking pin 50 again, just rotate the eccentric cam 71 counterclockwise to reset it.

[0057] Since one end of the actual profile of the eccentric cam 71 is always in contact with the screw 40 during the rotation process, and the contact point is dynamically changing, the distance between the contact point and the rotation center of the cam changes, so as to realize different degrees of pressing of the eccentric cam 71 on the screw 40.

[0058] The installation position of the eccentric cam 71, the axis position of the eccentric cam, and the selection of the rotation direction are selected according to the actual production parameters and the parameters of different springs 60 and screws 40. The present utility model does not limit this. And the function of the spring 60 is to drive the screw 40 to reset. The change in the spring installation position caused by using a tension spring and a compression spring for the spring 60 is not limited by the present utility model, and is also regarded as a technical solution that can be adopted by the present utility model.

[0059] The embodiments of the present application are described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other. The present application is not limited to the above specific implementation manners. The above specific implementation manners are only illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. A tool workpiece locking device, characterized in that: include: A housing (10) is provided with a mounting cavity (12) therein. An output shaft (20) is fixedly provided inside the housing (10). A sleeve (30) is slidably provided inside the output shaft (20). A locking pin (50) for locking a workpiece is clamped at the lower end of the sleeve (30). A screw rod (40) is provided at the upper end of the sleeve (30). The screw rod (40) passes through the upper end of the output shaft (20) and is placed outside. A spring (60) is sleeved on the screw rod (40). Two ends of the spring (60) are in contact with the screw rod (40) and the output shaft (20) respectively. A trigger (70) is provided at the upper end of the housing (10). One end of the trigger (70) is always in contact with the protruding end of the screw rod (40) and is used to drive the screw rod (40) to move.

2. A tool workpiece locking device according to claim 1, characterized in that: A through hole (21) is provided inside the output shaft (20), a step (22) is provided inside the through hole (21), and a fixing buckle (25) is provided at the outer ring end of the output shaft (20), the fixing buckle (25) being fixedly arranged on the end wall of the installation cavity (12).

3. A tool workpiece locking device according to claim 2, characterized in that: A positioning plate (23) is provided at the lower end of the output shaft (20), and positioning protrusions (24) are evenly arranged on the lower surface of the positioning plate (23).

4. A tool workpiece locking device according to claim 3, characterized in that: The shaft sleeve (30) is slidably disposed inside the through hole (21), and a steel ball (31) is provided at the lower end of the shaft sleeve (30).

5. A tool workpiece locking device according to claim 4, characterized in that: A spherical lock head (51) is provided at the upper end of the locking pin (50), and the spherical lock head (51) is in contact with and locked with the steel ball (31).

6. A tool workpiece locking device according to claim 5, characterized in that: A clamping plate (52) is also provided at the lower end of the locking pin (50), and the clamping plate (52) contacts and clamps the bottom of the tool workpiece.

7. A tool workpiece locking device according to claim 1, characterized in that: The upper end of the shaft sleeve (30) is threadedly connected to the screw rod (40), and a retaining ring (41) is sleeved on the upper end of the screw rod (40). The spring (60) is compressed so that one end presses against the retaining ring (41) and the other end presses against the upper end of the output shaft (20).

8. The tool workpiece locking device according to claim 1, characterized in that: The trigger (70) comprises: A rib plate (11), wherein a cylindrical pin (73) is provided on the rib plate (11), an eccentric cam (71) is rotatably provided on the cylindrical pin (73), one side of the eccentric cam (71) always abuts against the upper end of the screw rod (40), and a handle (72) is provided at one end of the eccentric cam (71).

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