Tool changing and locking device and machine tool

Abstract

The utility model discloses a kind of tool changing locking devices, comprising: pedestal;Operating member, operating member includes operating main body, latch eccentric wheel and switch eccentric wheel;Latch structure, latch structure includes latch piece and first elastic piece;On-off switch, on-off switch includes switch main body and elastic contact.The tool changing locking device in the utility model, by rotating operating member can control latch structure and on-off switch simultaneously, without user operating latch structure and on-off switch respectively, can reduce misoperation.The utility model discloses a kind of machine tool, including machine tool main body, tool shaft, driving motor and above-mentioned tool changing locking device.The machine tool in the utility model adopts above-mentioned tool changing locking device, tool changing locking device is set on machine tool main body to avoid loss, and using the tool changing locking device can reduce misoperation, facilitate user use.

Description

Technical Field

[0001] This utility model belongs to the field of machine tool technology, specifically relating to a tool changing locking device and a machine tool. Background Technology

[0002] A machine tool is a mechanical device used to process materials such as metal, plastic, and wood. It transforms raw materials into desired parts or products through cutting, forging, stamping, drilling, grinding, and other methods. It is the core equipment of the manufacturing industry and is known as the "mother machine of industry" or "work machine." The main types of machine tools include lathes, milling machines, drilling machines, grinding machines, and boring machines, among others.

[0003] In related technologies, when loading or changing tools, the user must first turn off the switch of the drive motor that controls the rotation of the tool spindle. To prevent the rotation of the tool spindle from causing injury to the user or damage to parts, the user needs to insert a pin into the pin hole of the tool spindle to restrict its rotation. After the tool spindle has finished loading or changing tools, the user pulls out the pin to release the restriction on the rotation of the tool spindle. Otherwise, starting the motor while the tool spindle is locked may damage the tool spindle, motor, and transmission belt. The user then turns on the switch of the drive motor that controls the rotation of the tool spindle to use the machine tool for machining the workpiece.

[0004] Thus, the pin is a separate part with no connection between it and the machine tool. The pin is easy to lose, and when loading or changing tools, the user may accidentally turn on the drive motor switch, which may cause injury to the user or damage to the parts. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, one of the objectives of this utility model is to provide a tool changing locking device. This tool changing locking device can control the pin structure and the on / off switch simultaneously by rotating the operating component, eliminating the need for the user to operate the pin structure and the on / off switch separately, thereby reducing misoperation and making it easier for the user to use.

[0006] The second objective of this utility model is to provide a machine tool in which the above-mentioned tool changing locking device is used. The tool changing locking device is installed on the main body of the machine tool to prevent loss. Moreover, the use of this tool changing locking device can reduce misoperation and facilitate user operation.

[0007] One of the objectives of this utility model is achieved through the following technical solution:

[0008] A tool changer locking device, comprising:

[0009] Base;

[0010] The control component includes an operating body, a pin eccentric wheel, and a switch eccentric wheel that are connected to each other. The operating body extends along a first direction and is rotatably connected to the base. The pin eccentric wheel is eccentrically mounted on the operating body, and the switch eccentric wheel is eccentrically mounted on the operating body. The pin eccentric wheel and the switch eccentric wheel are arranged along the axial direction of the operating body.

[0011] The pin structure is located on the side of the pin eccentric wheel. The pin structure includes a pin component and a first elastic component that are connected to each other. The first elastic component drives the pin component to approach the pin eccentric wheel.

[0012] The on / off switch is located beside the eccentric wheel of the switch. The on / off switch includes a switch body and a resilient contact that are connected to each other. The resilient contact is located on the switch body.

[0013] As an optional implementation, a limiting step is provided at the first end of the pin, and the first end of the pin is located near the pin eccentric wheel;

[0014] The first elastic element is sleeved on the pin, and the first end of the first elastic element abuts or is fixedly connected to the limiting step, and the second end of the first elastic element abuts or is fixedly connected to the base.

[0015] As an optional implementation, the pin includes a first pin body, a second pin body, and a second elastic member. The first pin body is provided with a connecting hole, the second pin body is inserted into the connecting hole, and the second elastic member is provided between the first pin body and the second pin body.

[0016] As an optional implementation, the base includes a first substrate and a second substrate;

[0017] The first substrate is provided with a first mounting hole for rotating connection with the control body;

[0018] A power switch is disposed on a second base plate, and a second mounting hole is provided on the second base plate for rotating connection with the operating body;

[0019] The pin structure is disposed on the first substrate, the first substrate is provided with a third mounting hole for inserting the pin, and the second end of the first elastic member abuts or is connected and fixed to the first substrate.

[0020] As an optional implementation, the first substrate is provided with a mounting groove for movably connecting with the eccentric pin wheel.

[0021] As an optional implementation, the latch structure and the on / off switch are respectively located on both sides of the operating element.

[0022] As an optional implementation, the latch structure and the on / off switch are both located on the same side of the operating element.

[0023] The second objective of this utility model is achieved by the following technical solution:

[0024] A machine tool includes a machine tool body, a tool shaft, a drive motor, and the aforementioned tool changing locking device;

[0025] The tool changing locking device and the tool shaft are both mounted on the machine tool body. The tool shaft is rotatably connected to the machine tool body, and the drive motor is driven by the tool shaft to rotate the tool shaft. The power switch is electrically connected to the drive motor.

[0026] As an optional implementation, the machine tool also includes a transmission mechanism, which includes a driving wheel, a driven wheel, and a transmission belt. The output shaft of the drive motor is connected to the driving wheel. The transmission belt is sleeved on the driven wheel and the driven wheel. Both the driving wheel and the driven wheel are connected to the transmission belt. The driven wheel is coaxially arranged with the tool shaft and is connected to it.

[0027] The tool changing locking device is located beside the driven wheel. The pin moves away from the driven wheel under the action of the first elastic element, or moves closer to the driven wheel under the action of the operating element.

[0028] As an alternative implementation, the transmission belt is sleeved on the first end of the driven pulley, and the second end of the driven pulley is provided with a pin hole for engaging with the second end of the pin.

[0029] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0030] 1. In the tool changing locking device of this utility model, the operating member can drive the eccentric wheel of the pin to push the pin out by rotating in the forward direction, and the eccentric wheel of the switch pushes the elastic contact; the operating member can drive the eccentric wheel of the pin away from the pin by rotating in the reverse direction, so that the first elastic element drives the pin to reset, and the eccentric wheel of the switch moves away from the elastic contact, so that the elastic contact is reset. Thus, the tool changing locking device can control the pin structure and the on / off switch at the same time by rotating the operating member, without the user having to operate the pin structure and the on / off switch separately, which can reduce misoperation and facilitate user use.

[0031] 2. The machine tool in this utility model adopts the above-mentioned tool changing locking device. The tool changing locking device is set on the machine tool body to avoid loss. The operating component can drive the pin eccentric wheel to push the pin out to restrict the rotation of the tool shaft by rotating in the forward direction, and use the switch eccentric wheel to push the elastic contact to de-energize the drive motor. The operating component can drive the pin eccentric wheel away from the pin by rotating in the reverse direction, so that the first elastic element drives the pin to reset to release the restriction on the rotation of the tool shaft, and use the switch eccentric wheel to move away from the elastic contact, so that the elastic contact resets to energize the drive motor. Thus, the tool changing locking device can control the pin structure and the on / off switch at the same time by rotating the operating component, without the user having to operate the pin structure and the on / off switch separately, which can reduce misoperation and facilitate user use. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a first-view structural schematic diagram of the tool changing locking device in Embodiment 1 of this utility model.

[0034] Figure 2 This is a second-view structural schematic diagram of the tool changing locking device in Embodiment 1 of this utility model.

[0035] Figure 3 This is a schematic diagram of the first operating state of the tool changing locking device in Embodiment 1 of this utility model.

[0036] Figure 4 This is a schematic diagram of the second operating state of the tool changing locking device in Embodiment 1 of this utility model.

[0037] Figure 5 This is a partial structural schematic diagram of the tool changing and locking device in Embodiment 1 of this utility model.

[0038] Figure 6 This is a structural schematic diagram of the machine tool from a first-view perspective in Embodiment 2 of this utility model.

[0039] Figure 7 This is a structural schematic diagram of the machine tool from a second perspective in Embodiment 2 of this utility model.

[0040] Figure 8 This is in embodiment 2 of the present utility model Figure 7 A partial structural diagram.

[0041] Figure 9This is a schematic diagram of the internal structure of the machine tool in Embodiment 2 of this utility model.

[0042] Figure 10 This is in embodiment 2 of the present utility model Figure 9 A partial structural diagram.

[0043] Explanation of key figure labels:

[0044] 10. Base; 101. First base plate; 1011. First mounting hole; 1012. Third mounting hole; 1012. Mounting groove; 102. Second base plate; 1021. Second mounting hole; 20. Operating element; 201. Operating body; 202. Pin eccentric wheel; 203. Switch eccentric wheel; 30. Pin structure; 301. Pin component; 3011. Limiting step; 3012. First pin body; 3013. Second pin body; 3014. Second elastic element; 3015. Connecting hole; 302. First elastic element; 40. On / off switch; 401. Switch body; 402. Elastic contact; 50. Machine tool body; 501. Fourth mounting hole; 60. Tool shaft; 70. Drive motor; 80. Transmission mechanism; 801. Driving wheel; 802. Driven wheel; 8021. Pin hole; 803. Transmission belt. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0046] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0047] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0048] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0049] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0050] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0051] Example 1

[0052] See Figure 1 as well as Figure 5 This utility model discloses a tool changing locking device, including: a base 10; and an operating component 20. The operating component 20 includes an operating body 201, a pin eccentric wheel 202, and a switch eccentric wheel 203 connected to each other. The operating body 201 extends along a first direction and is rotatably connected to the base 10. The pin eccentric wheel 202 is eccentrically disposed on the operating body 201, and the switch eccentric wheel 203 is eccentrically disposed on the operating body 201. The pin eccentric wheel 202 and the switch eccentric wheel 203 extend along the operating body 10. Axial arrangement of body 201; pin structure 30, the pin structure 30 is disposed beside the pin eccentric wheel 202, the pin structure 30 includes a pin part 301 and a first elastic member 302 connected to each other, the first elastic member 302 drives the pin part 301 to approach the pin eccentric wheel 202; on / off switch 40, the on / off switch 40 is disposed beside the switch eccentric wheel 203, the on / off switch 40 includes a switch body 401 and an elastic contact 402 connected to each other, the elastic contact 402 is disposed on the switch body 401.

[0053] In this utility model, the tool changing locking device allows the operating member 20 to rotate in the forward direction, causing the pin eccentric wheel 202 to push the pin 301 out, and the switch eccentric wheel 203 to push the elastic contact 402. Alternatively, the operating member 20 can rotate in the reverse direction, causing the pin eccentric wheel 202 to move away from the pin 301, thereby causing the first elastic member 302 to reset the pin 301. The switch eccentric wheel 203 can also move away from the elastic contact 402, thus resetting the elastic contact 402. Therefore, by rotating the operating member 20, the tool changing locking device can simultaneously control the pin structure 30 and the on / off switch 40, eliminating the need for the user to operate the pin structure 30 and the on / off switch 40 separately, reducing misoperation and facilitating user operation.

[0054] See Figures 1 to 5 The first direction is the vertical direction, and the second direction is the horizontal direction.

[0055] It should be noted that forward rotation refers to clockwise rotation, and reverse rotation refers to counterclockwise rotation; or forward rotation refers to counterclockwise rotation, and reverse rotation refers to clockwise rotation.

[0056] Specifically, the pin eccentric wheel 202 is connected and fixed to the operating body 201, and the switch eccentric wheel 203 is connected and fixed to the operating body 201, so as to realize the pin eccentric wheel 202, the switch eccentric wheel 203 and the operating body 201 rotating as a whole.

[0057] See Figure 3 When the eccentric wheel 202 pushes the pin 301 out, the part of the eccentric wheel 202 with a larger eccentricity pushes the pin 301; and when the eccentric wheel 203 pushes the elastic contact 402, the part of the eccentric wheel 203 with a larger eccentricity pushes the elastic contact 402.

[0058] See Figure 4 When the eccentric wheel 202 moves away from the pin 301, and the first elastic element 302 drives the pin 301 to reset, the smaller part of the eccentricity of the eccentric wheel 202 faces the pin 301; when the eccentric wheel 203 moves away from the elastic contact 402, and the elastic contact 402 resets, the smaller part of the eccentricity of the eccentric wheel 203 faces the elastic contact 402.

[0059] It should be noted that the on / off switch 40 can directly adopt the existing normally open push-button switch. The working principle of the normally open push-button switch will not be described in detail here.

[0060] In this embodiment of the utility model, the first end of the pin 301 is provided with a limiting step 3011, and the first end of the pin 301 is located near the pin eccentric wheel 202; the first elastic member 302 is sleeved on the pin 301, and the first end of the first elastic member 302 abuts or is connected and fixed with the limiting step 3011, and the second end of the first elastic member 302 abuts or is connected and fixed with the base 10.

[0061] It should be noted that the first elastic element 302 is a spring. The first elastic element 302 is disposed between the limiting step 3011 and the base 10. When the pin 301 is pushed by the pin eccentric wheel 202, the pushing force of the pin eccentric wheel 202 overcomes the elastic force of the first elastic element 302 and drives the pin 301 to extend. When the pin 301 is not pushed by the pin eccentric wheel 202, the pin 301 is reset under the elastic force of the first elastic element 302.

[0062] In this embodiment of the utility model, the pin 301 includes a first pin body 3012, a second pin body 3013, and a second elastic member 3014. The first pin body 3012 is provided with a connecting hole 3015, the second pin body 3013 is inserted into the connecting hole 3015, and the second elastic member 3014 is provided between the first pin body 3012 and the second pin body 3013.

[0063] When the eccentric wheel 202 pushes the pin 301 out, the second elastic element 3014 can reduce the impact when the second pin body 3013 comes into contact with the target object, which can be the cutter shaft 60 or the driven wheel 802 mentioned below.

[0064] It should be noted that the second elastic element 3014 is a spring, and the elastic force of the first elastic element 302 is much greater than that of the second elastic element 3014. As a result, the travel distance between the first pin body 3012 and the second pin body 3013 under the action of the second elastic element 3014 is much smaller than the overall travel distance of the pin 301, so as not to affect the locking of the pin 301 to the target object.

[0065] It should be noted that in other embodiments, the pin 301 is an integral structure, such as a pin rod, which does not include the first pin body 3012, the second pin body 3013, and the second elastic member 3014.

[0066] In this embodiment of the present invention, the base 10 includes a first substrate 101 and a second substrate 102; the first substrate 101 is provided with a first mounting hole 1011 for rotatably connecting with the operating body 201; the on / off switch 40 is provided on the second substrate 102, and the second substrate 102 is provided with a second mounting hole 1021 for rotatably connecting with the operating body 201; the pin structure 30 is provided on the first substrate 101, the first substrate 101 is provided with a third mounting hole 1012 for the pin 301 to pass through, and the second end of the first elastic member 302 abuts against or is fixedly connected to the first substrate 101.

[0067] The first mounting hole 1011 and the second mounting hole 1021 are rotatably connected to the control body 201, so that the first substrate 101 and the second substrate 102 respectively support the two positions of the control body 201, thereby achieving two-point support for the control body 201 and improving the installation stability of the control body 201.

[0068] In this embodiment of the present invention, a mounting groove 1013 for movably connecting with the eccentric pin wheel 202 is provided on the first substrate 101.

[0069] See Figures 1 to 4 When the control member 20 is rotated, the pin eccentric wheel 202 rotates in the mounting groove 1013. By controlling the inner diameter of the mounting groove 1013, the groove wall of the mounting groove 1013 limits the pin eccentric wheel 202 in the longitudinal direction. Thus, the mounting groove 1013 can reduce the up-and-down swing of the pin eccentric wheel 202 when the control member 20 is rotated, thereby improving the rotational stability of the control member 20.

[0070] In this embodiment of the utility model, the pin structure 30 and the on / off switch 40 are respectively disposed on both sides of the operating member 20.

[0071] For example, see Figures 1 to 5 The pin structure 30 is located on the left side of the control member 20, and the power switch 40 is located on the right side of the control member 20. At this time, the larger eccentric part of the pin eccentric wheel 202 and the larger eccentric part of the switch eccentric wheel 203 are respectively located on both sides of the control body 201.

[0072] Of course, in other embodiments, the latch structure 30 and the power switch 40 are both located on the same side of the operating member 20.

[0073] For example, if both the pin structure 30 and the on / off switch 40 are located on the left side of the operating member 20, then the larger eccentricity of the pin eccentric wheel 202 and the larger eccentricity of the switch eccentric wheel 203 are located on the same side of the operating body 201; or if both the pin structure 30 and the on / off switch 40 are located on the right side of the operating member 20, then the larger eccentricity of the pin eccentric wheel 202 and the larger eccentricity of the switch eccentric wheel 203 are located on the same side of the operating body 201.

[0074] Example 2

[0075] See Figures 1 to 10 This utility model discloses a machine tool, including a machine tool body 50, a tool shaft 60, a drive motor 70, and the aforementioned tool changing locking device; the tool changing locking device and the tool shaft 60 are both mounted on the machine tool body 50, the tool shaft 60 is rotatably connected to the machine tool body 50, the drive motor 70 is drively connected to the tool shaft 60 to drive the tool shaft 60 to rotate, and the power switch 40 is electrically connected to the drive motor 70.

[0076] The machine tool in this invention uses the aforementioned tool changing locking device, which is mounted on the machine tool body 50 to prevent loss. The operating member 20 can rotate in the forward direction to drive the pin eccentric wheel 202 to push the pin 301 out to restrict the rotation of the tool shaft 60, and use the switch eccentric wheel 203 to push the elastic contact 402 to de-energize the drive motor 70. The operating member 20 can rotate in the reverse direction to drive the pin eccentric wheel 202 away from the pin 301, thereby causing the first elastic member 302 to reset the pin 301 to release the rotation restriction on the tool shaft 60, and use the switch eccentric wheel 203 to move away from the elastic contact 402, thereby resetting the elastic contact 402 to energize the drive motor 70. Thus, the tool changing locking device can simultaneously control the pin structure 30 and the on / off switch 40 by rotating the operating member 20, eliminating the need for the user to operate the pin structure 30 and the on / off switch 40 separately, reducing misoperation and making it easier for the user to use.

[0077] It should be noted that the start / stop switch of the drive motor 70 is a different switch from the power switch 40. The start / stop switch of the drive motor 70 is used to control the rotation or stop of the drive motor 70. Since the power switch 40 controls the power on or off of the drive motor 70, the drive motor 70 is in a de-energized state when the tool shaft 60 is being loaded or changed. The user cannot turn on the drive motor 70 by operating the start / stop switch of the drive motor 70, so as to avoid the situation where the tool shaft 60 is rotated due to accidental operation of the start / stop switch of the drive motor 70 when loading or changing tools, thus improving safety.

[0078] Specifically, the machine tool body 50 is provided with a fourth mounting hole 501 for rotatably connecting with the tool shaft 60.

[0079] It should be noted that the pin 301 can directly abut against the cutter shaft 60 to directly restrict the rotation of the cutter shaft 60, or the pin can indirectly restrict the rotation of the cutter shaft 60 by abutting against the position where the drive motor 70 is connected to the cutter shaft 60.

[0080] The following explanation uses the example of the pin 301 abutting against the driven wheel 802 to indirectly restrict the rotation of the cutter shaft 60.

[0081] In this embodiment of the utility model, the machine tool further includes a transmission mechanism 80, which includes a drive wheel 801, a driven wheel 802, and a transmission belt 803. The output shaft of the drive motor 70 is connected to the drive wheel 801. The transmission belt 803 is sleeved on the driven wheel 802. Both the drive wheel 801 and the driven wheel 802 are connected to the transmission belt 803. The driven wheel 802 is coaxially arranged with the tool shaft 60 and is connected to it. The tool changing locking device is located on the side of the driven wheel 802. The pin 301 moves away from the driven wheel 802 under the action of the first elastic member 302, or moves closer to the driven wheel 802 under the action of the operating member 20.

[0082] It should be noted that when the machine tool needs to perform tool loading and tool changing operations, the user first turns off the start / stop switch of the drive motor 70, and the tool shaft 60 stops rotating. Then, the user rotates the operating element 20 in the forward direction to drive the pin eccentric wheel 202 to push the pin 301 out to abut against the driven wheel 802, thereby restricting the rotation of the tool shaft 60. The user also uses the switch eccentric wheel 203 to push the elastic contact 402 to de-energize the drive motor 70. After the machine tool completes the tool loading and tool changing operations, the operating element 20 rotates in the reverse direction to drive the pin eccentric wheel 202 away from the pin 301. This causes the first elastic element 302 to drive the pin 301 to reset, thereby releasing the rotation restriction on the tool shaft 60. The user then uses the switch eccentric wheel 203 to move away from the elastic contact 402, thereby resetting the elastic contact 402 to energize the drive motor 70. The user then turns on the start / stop switch of the drive motor 70, thus using the machine tool to perform machining on the workpiece.

[0083] In this embodiment of the present invention, the transmission belt 803 is sleeved on the first end of the driven wheel 802, and the second end of the driven wheel 802 is provided with a pin hole 8021 for cooperating with the second end of the pin 301.

[0084] It should be noted that when the user rotates the control member 20 in the forward direction, causing the pin eccentric wheel 202 to push the pin member 301 out to abut against the driven wheel 802, the pin member 301 can abut against the outer wall of the driven wheel 802 to restrict the rotation of the driven wheel 802, or the pin member 301 can abut against the pin hole 8021 to restrict the rotation of the driven wheel 802.

[0085] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A tool changing locking device, characterized in that, include: Base; The control element includes an operating body, a pin eccentric wheel, and a switch eccentric wheel that are connected to each other. The operating body extends along a first direction and is rotatably connected to the base. The pin eccentric wheel is eccentrically disposed on the operating body, and the switch eccentric wheel is eccentrically disposed on the operating body. The pin eccentric wheel and the switch eccentric wheel are arranged along the axial direction of the operating body. A pin structure is provided on the side of the pin eccentric wheel. The pin structure includes a pin component and a first elastic component connected to each other. The first elastic component drives the pin component to move closer to the pin eccentric wheel. A power switch is provided, which is located beside the eccentric wheel of the switch. The power switch includes a switch body and a resilient contact connected to each other, and the resilient contact is located on the switch body.

2. The tool changing locking device according to claim 1, characterized in that: The first end of the pin is provided with a limiting step, and the first end of the pin is located near the pin eccentric wheel; The first elastic element is sleeved on the pin, and the first end of the first elastic element abuts or is fixedly connected to the limiting step, and the second end of the first elastic element abuts or is fixedly connected to the base.

3. The tool changing locking device according to claim 2, characterized in that: The pin assembly includes a first pin body, a second pin body, and a second elastic element. The first pin body is provided with a connecting hole, the second pin body is inserted into the connecting hole, and the second elastic element is provided between the first pin body and the second pin body.

4. The tool changing locking device according to claim 2, characterized in that: The base includes a first substrate and a second substrate; The first substrate is provided with a first mounting hole for rotatably connecting with the operating body; The on / off switch is disposed on the second base plate, and the second base plate is provided with a second mounting hole for rotatably connecting with the operating body; The pin structure is disposed on the first substrate, the first substrate is provided with a third mounting hole for the pin to pass through, and the second end of the first elastic member abuts or is connected and fixed to the first substrate.

5. The tool changing locking device according to claim 4, characterized in that: The first base plate is provided with a mounting groove for movably connecting with the eccentric wheel of the pin.

6. The tool changing locking device according to claim 1, characterized in that: The latch structure and the on / off switch are respectively located on both sides of the operating member.

7. The tool changing locking device according to claim 1, characterized in that: The latch structure and the on / off switch are both located on the same side of the operating element.

8. A machine tool, characterized in that: Includes the machine tool body, the tool shaft, the drive motor, and the tool changing locking device as described in any one of claims 1-7; The tool changing locking device and the tool shaft are both mounted on the machine tool body. The tool shaft is rotatably connected to the machine tool body. The drive motor is driven by the tool shaft to drive the tool shaft to rotate. The power switch is electrically connected to the drive motor.

9. The machine tool according to claim 8, characterized in that: The machine tool also includes a transmission mechanism, which includes a driving wheel, a driven wheel, and a transmission belt. The output shaft of the drive motor is connected to the driving wheel. The transmission belt is sleeved on the driven wheel and the driven wheel. The driving wheel and the driven wheel are both connected to the transmission belt. The driven wheel is coaxially arranged with the tool shaft and is connected to it. The tool changing locking device is located beside the driven wheel. The pin moves away from the driven wheel under the action of the first elastic member, or moves closer to the driven wheel under the action of the operating member.

10. The machine tool according to claim 9, characterized in that: The transmission belt is sleeved on the first end of the driven wheel, and the second end of the driven wheel is provided with a pin hole for engaging with the second end of the pin.

Images