Tool changing and stacking alarm device

Abstract

The utility model provides a tool changing and stacking alarm device. The tool changing and stacking alarm device comprises a tool apron, a tool apron core, a micro travel switch and an elastic piece, a movable cavity is formed in the tool apron; the tool apron core is vertically arranged in the movable cavity, the tool apron core is in sliding connection with the tool apron, the tool apron core is provided with a first mounting groove with an opening in the top end, and the first mounting groove is used for containing a tool; the micro-travel switch is connected with the bottom end of the tool apron and the limiting signal system, and the bottom end of the tool apron core is movably connected with the micro-travel switch, so that the micro-travel switch is triggered; the elastic piece is arranged in the movable cavity and drives the tool apron core to be away from the micro travel switch. When the tool is installed correctly, the elastic piece can drive the tool apron core to be away from the micro-travel switch, and the normal working state is kept. When the cutters are replaced and superposed abnormally, the micro travel switch can immediately transmit a signal to the limiting signal system, so that an alarm or shutdown is triggered, and the mechanical damage caused by the superposition of the cutters is avoided.

Description

Technical Field

[0001] The utility model relates to the field of machine tool equipment, in particular to a tool changing and stacking alarm device. Background Art

[0002] The automatic tool changing function of CNC machine tools is realized through a pre-set program, including the selection of tool changing positions, fixture switching, tool calibration and other processes, so that the machine can automatically complete the tool changing operation.

[0003] Traditional tool changing devices may lack the ability to detect and respond in real time. During the automated tool changing process, the tool may remain in the spring clamp of the robot arm's spindle and fail to be released correctly, but the robot arm still executes the tool changing procedure, which will cause tool stacking and further cause mechanical collision and damage.

[0004] Therefore, it is necessary to provide a tool changing and stacking alarm device to solve the above technical problems. Utility Model Content

[0005] The utility model provides a tool changing and stacking alarm device to solve the problem that the machine tool in the prior art lacks a tool stacking alarm device, resulting in tool stacking if the tool changing device fails to release the tool correctly during the automatic tool changing process, thereby causing mechanical collision and damage.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a tool changing and stacking alarm device, characterized in that it includes:

[0007] A knife seat, wherein a movable cavity is arranged inside the knife seat;

[0008] A knife seat core is vertically arranged in the movable cavity, the knife seat core is slidably connected to the knife seat, and the knife seat core is provided with a first mounting groove with a top opening, and the first mounting groove is used to place a knife;

[0009] A micro-stroke switch connected to the bottom end of the knife seat, the micro-stroke switch is connected to a limit signal system, and the bottom end of the knife seat core is movably connected to the micro-stroke switch, thereby triggering the micro-stroke switch; and

[0010] An elastic member, disposed in the movable cavity, and driving the knife seat core away from the micro-travel switch;

[0011] The movement trajectory of the tool seat core includes a working position and an alarm position arranged in sequence from top to bottom, and the working position is above the alarm position; when the tool seat core is at the working position, the tool seat core is movably connected to the tool, and the tool seat core is located within the set stroke of the micro-stroke switch; when the tool seat core is at the alarm position, the tool is plugged into the first mounting slot, and the tool seat core triggers the micro-stroke switch.

[0012] The tool changing and stacking alarm device of the utility model further comprises an O-ring, wherein the O-ring is located in the movable cavity, the O-ring is sleeved on the outer ring of the tool holder core, and the O-ring is used for the sliding self-centering of the tool holder core.

[0013] The tool changing and stacking alarm device of the utility model further comprises a retaining spring, which is located at the bottom end of the tool seat, and the retaining spring is connected to the outer side of the tool seat core, and the retaining spring is used to limit the position of the tool seat core.

[0014] In the utility model, the knife seat core comprises:

[0015] A first connection end, located at the top of the tool holder core, and the first connection end is used for inserting a tool;

[0016] A second connecting end is located in the middle of the tool holder core; and

[0017] A third connection end, located at the bottom end of the knife seat core and connected to the bottom end of the second connection end, the bottom end of the third connection end extends out of the knife seat, and the bottom end of the third connection end is used to trigger the micro-travel switch;

[0018] The cross-sectional diameter of the second connecting end is larger than the cross-sectional diameter of the first connecting end and the cross-sectional diameter of the third connecting end, and the elastic member is arranged between the bottom end of the second connecting end and the bottom wall of the knife seat.

[0019] In the utility model, the first connecting end is provided with a plurality of locking tongues, the plurality of locking tongues are arranged in a circular shape along the axial direction of the first connecting end, and an axial gap is provided between adjacent locking tongues.

[0020] In the utility model, a guiding inclined surface is arranged on the inner side of the first connecting end, and the inner diameter of the first connecting end gradually increases away from the second connecting end.

[0021] In the utility model, a second installation groove is arranged on the outer side of the tool holder core, and the O-ring is engaged with the second installation groove.

[0022] In the utility model, a third installation groove is arranged on the outer side of the knife seat core, and the clamping spring is engaged with the third installation groove.

[0023] In the utility model, the knife seat comprises:

[0024] The knife seat cup is a cylindrical structure with two ends open, the knife seat core is slidably connected to the knife seat cup, and the bottom end of the knife seat cup is connected to the micro-travel switch; and

[0025] The tool seat cover is detachably connected to the top of the tool seat cup, and is used to close the top of the tool seat cup to form an active cavity. The top of the tool seat core passes through and extends from the tool seat cover, and the tool seat cover is used to limit the position of the tool seat core.

[0026] In the utility model, the knife seat cup comprises:

[0027] A first fixed end is located at the top of the knife seat cup, the top of the first fixed end is engaged with the knife seat cover, and the bottom of the first fixed end is used to install the knife changing and stacking alarm device;

[0028] A second fixed end is located in the middle of the knife seat cup; and

[0029] A third fixed end is located at the bottom end of the knife seat cup, and an external thread is arranged on the outer side of the third fixed end;

[0030] Wherein, the micro-travel switch is threadedly connected to the third fixed end through a fixing nut, and the outer wall of the second fixed end is flush with the outer wall of the fixing nut.

[0031] Compared with the prior art, the utility model has the following beneficial effects: the tool changing and stacking alarm device of the utility model includes a working position and an alarm position arranged in sequence from top to bottom on the motion trajectory of the tool holder core, and the working position is above the alarm position; the tool holder core is located at the working position, and the tool holder core is movably connected with the tool to meet the normal tool changing operation of the tool, and the tool holder core is located within the set stroke of the micro-stroke switch; the tool holder core is located at the alarm position, and the tool holder core will move downward due to the weight of the stacked tool; the micro-stroke switch is triggered based on the tiny displacement of the tool holder core. The micro-stroke switch will immediately transmit the signal to the limit signal system, thereby triggering an alarm or shutdown, avoiding mechanical damage caused by tool stacking. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the utility model.

[0033] Figure 1 The figure is a schematic diagram of the structure of the preferred embodiment of the utility model in use state.

[0034] Figure 2 It is a stereoscopic diagram of a tool changing and stacking alarm device according to a preferred embodiment of the utility model.

[0035] Figure 3 This is a cross section of a tool changing and stacking alarm device according to a preferred embodiment of the utility model. Figure 1 .

[0036] Figure 4This is a cross section of a tool changing and stacking alarm device according to a preferred embodiment of the utility model. Figure 2 .

[0037] Figure 5 This is an exploded view of a tool changing and stacking alarm device according to a preferred embodiment of the present utility model.

[0038] Figure 6 This is a cross-sectional view of the installation structure of the tool changing and stacking alarm device according to the preferred embodiment of the utility model.

[0039] 1. Tool changing and stacking alarm device; 11. Tool holder; 111. Movable cavity; 1111. First movable part; 1112. Second movable part; 112. Tool holder cup; 1121. First fixed end; 1122. Second fixed end; 1123. Third fixed end; 113. Tool holder cover; 12. Tool holder core; 121. First connecting end; 1211. Lock tongue; 1212. Axial gap; 1213. Guide slope; 122. Second connecting end; 1221. Second mounting groove; 123. Third connecting end; 1231. Third mounting groove; 13. Micro-travel switch; 131. Fixing nut; 14. Elastic member; 15. O-ring; 16. Retaining spring; 2. Setting platform; 3. Tool; 4. Robot arm spindle. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0041] In the figures, structurally similar elements are denoted by the same reference numerals.

[0042] The words "first", "second" and the like in the terminology of the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be construed as limiting the order of precedence.

[0043] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in Figure 1 The figure is a schematic diagram of the structure of the preferred embodiment of the utility model in use state. Figure 2 It is a stereoscopic diagram of a tool changing and stacking alarm device according to a preferred embodiment of the utility model. Figure 3 This is a cross section of a tool changing and stacking alarm device according to a preferred embodiment of the utility model. Figure 1 . Figure 4This is a cross section of a tool changing and stacking alarm device according to a preferred embodiment of the utility model. Figure 2 .

[0044] The following is a preferred embodiment of a tool changing and stacking alarm device provided by the utility model that can solve the above technical problems.

[0045] A preferred embodiment of a tool changing and stacking alarm device provided by the utility model is: a tool changing and stacking alarm device 1, which includes a tool seat 11, a tool seat core 12, a micro-stroke switch 13 and an elastic member 14; an active cavity 111 is arranged inside the tool seat 11; the tool seat core 12 is vertically arranged in the active cavity 111, the tool seat core 12 is slidably connected with the tool seat 11, and the tool seat core 12 is provided with a first mounting groove with a top opening, and the first mounting groove is used to place the tool 3; the micro-stroke switch 13 is connected to the bottom end of the tool seat 11, the micro-stroke switch 13 is connected to the limit signal system, and the bottom end of the tool seat core 12 is movably connected to the micro-stroke switch 13, thereby triggering the micro-stroke switch 13; the elastic member 14 is placed in the active cavity 111, and the elastic member 14 drives the tool seat core 12 away from the micro-stroke switch 13.

[0046] The motion trajectory of the tool holder core 12 includes a working position and an alarm position which are arranged in sequence from top to bottom, and the working position is above the alarm position; when the tool holder core 12 is at the working position, the tool holder core 12 is movably connected with the tool 3, and the tool holder core 12 is within the set stroke of the micro-stroke switch 13; when the tool holder core 12 is at the alarm position, the tool 3 is plugged into the first mounting groove, and the tool holder core 12 triggers the micro-stroke switch 13.

[0047] The motion track working positions of the tool holder core 12 in this embodiment include a first working position and a second working position, and the first working position, the second working position and the alarm position are arranged from top to bottom in sequence. Figure 3 As shown, when the knife seat core 12 is located at the first working position, the knife seat core 12 is located within the set stroke of the micro-stroke switch 13, the tool 3 is away from the knife seat core 12, and the knife seat core 12 is away from the micro-stroke switch 13.

[0048] When the tool holder core 12 is located at the second working position, the tool holder core 12 is located within the set stroke of the micro-stroke switch 13, the tool holder core 12 is not in contact with the micro-stroke switch 13, the tool 3 is plugged into the first mounting groove, and the tool 3 waits for the robot arm spindle 4 to grab it.

[0049] like Figure 4 As shown, when the tool holder core 12 is in the alarm position, the tool 3 is plugged into the first mounting slot, and the tool holder core 12 contacts the micro-travel switch 13, the tool holder core 12 exceeds the set travel of the micro-travel switch 13, triggering the micro-travel switch 13. During the tool 3 replacement process, the robot arm spindle 4 moves downward to grab the tool 3, the tool 3 is subjected to force transmitted to the tool holder core 12, the elastic member 14 is compressed, and the tool holder core 12 moves downward due to the weight of the superimposed tool.

[0050] The tool holder core 12 moves downward beyond the set stroke of the micro-stroke switch 13, triggering the position signal of the micro-stroke switch 13. The limit signal system receives the signal, causing the servo motor driving the mechanical arm spindle 4 to reset and issue an alarm to prevent mechanical collision.

[0051] The micro-travel switch 13 will immediately transmit the signal to the limit signal system, thereby triggering an alarm or shutting down the machine, thus avoiding mechanical damage caused by the overlapping of the tools 3. The triggering of the micro-travel switch 13 is based on the tiny displacement of the tool holder core 12. This design enables the alarm system to respond immediately when there is a slight change in the position of the tool 3, thus improving the accuracy and sensitivity of the detection. When the tool 3 is installed correctly, the elastic member 14 will drive the tool holder core 12 away from the micro-travel switch 13 to maintain normal working state; when the tool 3 is abnormally changed and overlapped, the system will automatically trigger an alarm, thus avoiding mechanical damage caused by the overlapping of the tools 3.

[0052] The structure of the tool changing and stacking tool alarm device 1 in this embodiment is described in detail as follows:

[0053] Combination Figure 4 and Figure 5 The tool changing and stacking alarm device 1 in this embodiment also includes an O-ring 15, which is located in the movable cavity 111. The O-ring 15 is sleeved on the outer ring of the tool holder core 12, and the O-ring 15 is used for the sliding self-centering of the tool holder core 12. The O-ring 15 enables the tool holder core 12 to be more accurately kept in the center position during the sliding process. The tool holder core 12 can automatically adjust its position during the sliding process to achieve a centering state. When the tool holder core 12 is placed in, it can automatically adjust to ensure that the tool holder core 12 is correctly centered or positioned.

[0054] Combination Figure 4 and Figure 5 The tool changing and stacking alarm device 1 in this embodiment further includes a retaining spring 16, which is located at the bottom of the tool holder 11 and connected to the outside of the tool holder core 12. The retaining spring 16 is used to limit the position of the tool holder core 12. During the replacement or stacking of the tool 3, the retaining spring 16 prevents the tool holder core 12 from popping out. As long as the retaining spring 16 is in a normal working state, the tool holder core 12 can be kept in a safe position.

[0055] The structure of the tool holder core 12 in this embodiment is described in detail:

[0056] Combination Figure 3 , Figure 4 and Figure 5The tool holder core 12 includes a first connection end 121, a second connection end 122 and a third connection end 123; the first connection end 121 is located at the top of the tool holder core 12, and the first connection end 121 is used to plug in the tool 3; the second connection end 122 is located in the middle of the tool holder core 12; the third connection end 123 is located at the bottom of the tool holder core 12 and is connected to the bottom of the second connection end 122, the bottom of the third connection end 123 extends out of the tool holder 11, and the bottom of the third connection end 123 is used to trigger the micro-travel switch 13; wherein the cross-sectional diameter of the second connection end 122 is larger than the cross-sectional diameter of the first connection end 121 and the cross-sectional diameter of the third connection end 123, and the elastic member 14 is arranged between the bottom of the second connection end 122 and the bottom wall of the tool holder 11.

[0057] The first connection end 121 of the tool holder core 12 is used to plug in the tool 3, and its design is usually matched with the interface of the tool 3, making the installation and removal of the tool 3 more convenient and quick. The second connection end 122 has a larger cross-sectional diameter, which makes the tool holder core 12 more stable when it is acted upon by the tool 3 or other external forces, and is not prone to deformation or displacement, so as to facilitate maintaining the stability of the tool holder core 12 during the insertion of the tool 3. The third connection end 123 is located at the bottom of the tool holder core 12 and is used to trigger the micro-travel switch 13. Due to its small cross-sectional diameter, the displacement of the tool holder core 12 can be more accurately controlled, thereby ensuring that the micro-travel switch 13 can accurately trigger the alarm when the tool 3 is abnormal. This helps to improve the accuracy and reliability of the alarm system.

[0058] By increasing the cross-sectional diameter of the second connecting end 122, the elastic member 14 is arranged between the bottom end of the second connecting end 122 and the bottom wall of the tool holder 11. The elastic member 14 can be better arranged by utilizing the larger cross-sectional diameter of the second connecting end 122. This structural design can disperse the force between the tool 3 and the tool holder core 12 to a wider area, so that the tool holder core 12 can quickly return to the center position when it loses the weight of the tool 3 or is not correctly aligned.

[0059] In this embodiment, the first connection end 121 is provided with a plurality of locking tongues 1211 , which are arranged in a circular shape along the axial direction of the first connection end 121 , and an axial gap 1212 is provided between adjacent locking tongues 1211 .

[0060] By providing a plurality of locking tongues 1211 and leaving axial gaps 1212 therebetween, the tool 3 can be locked simultaneously by the plurality of locking tongues 1211 when inserted into the first connection end 121; the annular arrangement of the locking tongues 1211 allows the tool 3 to be uniformly stressed when inserted, which helps to accurately position the tool 3 at the center. Since the locking tongues 1211 are arranged in an axial row, the plurality of locking tongues 1211 can adapt to tools 3 of different sizes, making the alarm device more versatile and flexible.

[0061] In this embodiment, a second installation groove 1221 is provided on the outer side of the tool holder core 12, and the O-ring 15 is engaged with the second installation groove 1221, which limits the connection position between the O-ring 15 and the tool holder core 12, and the structure is more stable.

[0062] In this embodiment, a third installation groove 1231 is provided on the outer side of the tool holder core 12 , and the retaining spring 16 is engaged with the third installation groove 1231 , thereby improving the stability of the connection between the retaining spring 16 and the tool holder core 12 .

[0063] In this embodiment, a guiding inclined surface 1213 is provided on the inner side of the first connecting end 121 , and the inner diameter of the first connecting end 121 gradually increases away from the second connecting end 122 , so as to facilitate the insertion of the tool 3 .

[0064] The movable cavity 111 in this embodiment includes a first movable portion 1111 and a second movable portion 1112 . The first movable portion 1111 is located above the second movable portion 1112 . In this embodiment, the cross-sectional diameter of the second movable portion 1112 is smaller than that of the first movable portion 1111 .

[0065] The second connection end 122 of the knife seat core 12 is slidably connected to the first movable part 1111. Since the cross-sectional diameter of the first movable part 1111 is relatively large, it can provide a larger support area for the second connection end 122 of the knife seat core 12, making the knife seat core 12 more stable during sliding. The third connection end 123 passes through the second movable part 1112 and extends. The elastic member 14 is arranged in the third movable part, and the elastic member 14 is sleeved on the outside of the third connection end 123. By dividing the movable cavity 111 into the first movable part 1111 and the second movable part 1112, and arranging the elastic member 14 in the second movable part 1112, the structural design of the entire alarm device is simplified. This modular design makes the layout of each component compact and the overall volume of the alarm device small.

[0066] The structure of the knife holder 11 in this embodiment is described as follows:

[0067] Combination Figure 3 , Figure 4 and Figure 5 The knife seat 11 in this embodiment includes a knife seat cup 112 and a knife seat cover 113. The knife seat cup 112 is a cylindrical structure with openings at both ends. The knife seat core 12 is slidably connected to the knife seat cup 112. The bottom end of the knife seat core 12 passes through the bottom end of the knife seat cup 112 and extends. The bottom end of the knife seat cup 112 is connected to the micro-travel switch 13; the knife seat cover 113 is detachably connected to the top end of the knife seat cup 112. The knife seat cover 113 is used to close the top end of the knife seat cup 112, thereby forming an active cavity 111. The top end of the knife seat core 12 passes through the knife seat cover 113 and extends. The knife seat cover 113 is used to limit the position of the knife seat core 12.

[0068] Through the detachable connection between the tool holder cup 112 and the tool holder cover 113, the tool holder 11 has a simple structure and is easy to manufacture and assemble; at the same time, the tool holder cover 113 limits the position of the tool holder core 12, which can effectively prevent the tool holder core 12 from exceeding a predetermined range during the sliding process, thereby avoiding false alarms or mechanical failures triggered by abnormal position of the tool holder core 12.

[0069] In this embodiment, the tool holder cup 112 includes a first fixed end 1121, a second fixed end 1122 and a third fixed end 1123; wherein the first fixed end 1121 is located at the top of the tool holder cup 112, and the top of the first fixed end 1121 is engaged with the tool holder cover 113, ensuring a stable connection between the tool holder cover 113 and the tool holder cup 112, and the bottom of the first fixed end 1121 is used to install a tool changing and stacking tool alarm device, and the alarm device in this embodiment is installed on the setting platform 2 through the first fixed end 1121. The second fixed end 1122 is located in the middle of the tool holder cup 112; the third fixed end 1123 is located at the bottom of the tool holder cup 112, and an external thread is arranged on the outside of the third fixed end 1123.

[0070] Among them, the micro-travel switch 13 is threadedly connected to the third fixed end 1123 through the fixing nut 131, which not only ensures the precise installation position of the micro-travel switch 13, but also provides a stable fixing effect through the threaded connection, thereby improving the working accuracy and reliability of the micro-travel switch 13.

[0071] The outer wall of the second fixed end 1122 is flush with the outer wall of the fixing nut 131; the tool holder 11 has an ingenious structural design, which optimizes the spatial layout of the alarm device. The overall structure of the device is small in size and easy to assemble and use; the entire tool holder cup 112 can be easily integrated into the existing tool changing and stacking equipment.

[0072] Combination Figure 5 and Figure 6 The assembly steps of the tool changing and stacking alarm device 1 of the utility model are as follows:

[0073] 1. Prepare the knife seat 11 (knife seat cup 112, knife seat cover 113), knife seat core 12, micro-travel switch 13, elastic member 14, O-ring 15 and retaining spring 16.

[0074] 2. Install the knife holder cup 112.

[0075] The tool holder cup 112 is placed at a predetermined installation position on the setting platform 2 .

[0076] 3. Install the elastic member 14.

[0077] The elastic member 14 is placed in the movable cavity 111 inside the knife seat 11 .

[0078] 4. Install the O-ring 15.

[0079] The O-ring 15 is sleeved on the outer ring of the tool holder core 12 to ensure that the O-ring 15 is engaged with the second installation groove 1221 of the tool holder core 12 .

[0080] 5. Install the knife seat core 12.

[0081] First, insert the knife seat core 12 into the knife seat cup 112 from the top of the knife seat cover 113, and the knife seat core 12 is slidably connected to the knife seat 11; and the elastic member 14 is sleeved on the third connection end 123 of the knife seat core 12 to ensure that the elastic member 14 can provide thrust normally so that the knife seat core 12 can be away from the micro-travel switch 13.

[0082] Then, the position of the cutter seat core 12 is adjusted so that it can move up and down smoothly in the movable cavity 111 .

[0083] 6. Install the retaining ring 16.

[0084] Install the retaining spring 16 on the outside of the tool holder core 12 to ensure that the retaining spring 16 is engaged with the third installation groove 1231 of the tool holder core 12 .

[0085] 7. Install the knife seat cover 113.

[0086] Align the knife seat cover 113 with the top of the knife seat cup 112 to ensure that it is aligned with the first fixed end 1121; then press the knife seat cover 113 to engage and fix it with the first fixed end 1121 of the knife seat cup 112.

[0087] 8. Install the micro-travel switch 13.

[0088] First, align the micro-travel switch 13 with the through hole at the bottom end of the knife seat cup 112.

[0089] Secondly, the micro-travel switch 13 is threadedly connected to the third fixed end 1123 of the knife seat cup 112 using the fixing nut 131. Ensure that the micro-travel switch 13 is installed in the correct position and is firmly fixed.

[0090] Finally, according to the requirements of the alarm device, the power line and the signal line are connected to the corresponding interfaces of the micro-travel switch 13; ensure that the power line and the signal line are firmly connected without exposure or short circuit.

[0091] 9. Check whether the alarm device can work normally and whether it can trigger the alarm in time when the tool 3 is abnormal.

[0092] This completes the working process of the tool changing and stacking tool alarm device of the preferred embodiment.

[0093] Combination Figure 1 , Figure 3 and Figure 4 , during the use of the tool changing and stacking alarm device 1:

[0094] The main shaft 4 of the robot arm moves downward to grab the tool 3, the force of the tool 3 is transmitted to the tool holder core 12, the elastic member 14 is compressed, the tool holder core 12 moves downward to trigger the micro-stroke switch 13, the micro-stroke switch 13 sends a limit signal system receives the signal, the servo motor performs a reset action and sends an alarm to prevent mechanical collision.

[0095] For example, the micro-stroke switch 13 sets the stroke of the knife seat core 12 to be 3-5 cm from the micro-stroke switch 13. When the knife seat core 12 is located at the first working position, the distance between the knife seat core 12 and the micro-stroke switch 13 is 5 cm, and the knife seat core 12 is not plugged into the tool 3.

[0096] When the tool holder core 12 is located at the second working position, the distance between the tool holder core 12 and the micro-travel switch 13 is 3 cm, and the tool 3 is plugged into the top of the tool holder core 12, and the tool 3 is waiting for the robot arm spindle 4 to grab and assemble.

[0097] When the tool holder core 12 is in the alarm position, the distance between the tool holder core 12 and the micro-stroke switch 13 is less than 3 cm, the tool 3 is plugged into the top of the tool holder core 12, and the tool 3 is in contact with the tool to be replaced on the robot arm spindle 4. The tool holder core 12 will move downward due to the weight of the superimposed tool; the micro-stroke switch 13 is triggered based on the tiny displacement of the tool holder core 12.

[0098] The micro-travel switch 13 will immediately transmit a signal to the limit signal system. After receiving the signal, the system will trigger the servo motor to reset and issue an alarm, thereby causing an alarm or shutdown, avoiding mechanical damage caused by the overlap of the tool 3.

[0099] The core of the present invention in this embodiment is not the basic connection technology of the micro-travel switch, but the unique structural layout of the tool holder 11 and the micro-travel switch 13 and the precise coordination with other components to avoid mechanical damage caused by tool change and tool stacking. The micro-travel switch 13 and its corresponding limit system and the basic connection technology of the robot arm in the automation equipment are widely used in the prior art in this field and will not be described in detail here.

[0100] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A tool changing and stacking alarm device, characterized in that: include: A knife seat, wherein a movable cavity is arranged inside the knife seat; A knife seat core is vertically arranged in the movable cavity, the knife seat core is slidably connected to the knife seat, and the knife seat core is provided with a first mounting groove with a top opening, and the first mounting groove is used to place a knife; A micro-stroke switch is connected to the bottom end of the knife seat, the micro-stroke switch is connected to the limit signal system, and the bottom end of the knife seat core is movably connected to the micro-stroke switch, thereby triggering the micro-stroke switch; as well as An elastic member, disposed in the movable cavity, and driving the knife seat core away from the micro-travel switch; The movement trajectory of the tool seat core includes a working position and an alarm position arranged in sequence from top to bottom, and the working position is above the alarm position; when the tool seat core is at the working position, the tool seat core is movably connected to the tool, and the tool seat core is located within the set stroke of the micro-stroke switch; when the tool seat core is at the alarm position, the tool is plugged into the first mounting slot, and the tool seat core triggers the micro-stroke switch.

2. A tool changing and stacking alarm device according to claim 1, characterized in that: It also includes an O-ring, which is located in the active cavity and sleeved on the outer ring of the tool holder core. The O-ring is used for the sliding self-centering of the tool holder core.

3. The tool changing and stacking alarm device according to claim 1, characterized in that: It also includes a retaining spring, which is located at the bottom end of the tool seat and connected to the outer side of the tool seat core. The retaining spring is used to limit the position of the tool seat core.

4. The tool changing and stacking alarm device according to claim 1, characterized in that: The tool holder core comprises: A first connection end, located at the top of the tool holder core, and the first connection end is used for inserting a tool; A second connecting end is located in the middle of the tool holder core; and A third connection end, located at the bottom end of the knife seat core and connected to the bottom end of the second connection end, the bottom end of the third connection end extends out of the knife seat, and the bottom end of the third connection end is used to trigger the micro-travel switch; The cross-sectional diameter of the second connecting end is larger than the cross-sectional diameter of the first connecting end and the cross-sectional diameter of the third connecting end, and the elastic member is arranged between the bottom end of the second connecting end and the bottom wall of the knife seat.

5. The tool changing and stacking alarm device according to claim 4, characterized in that: The first connection end is provided with a plurality of locking tongues, which are arranged in a circular shape along the axial direction of the first connection end, and an axial gap is provided between adjacent locking tongues.

6. The tool changing and stacking alarm device according to claim 4, characterized in that: A guiding slope is arranged on the inner side of the first connecting end, and the inner diameter of the first connecting end gradually increases away from the second connecting end.

7. The tool changing and stacking alarm device according to claim 2, characterized in that: A second mounting groove is arranged on the outer side of the tool holder core, and the O-ring is engaged with the second mounting groove.

8. The tool changing and stacking alarm device according to claim 3, characterized in that: A third mounting groove is arranged on the outer side of the knife seat core, and the clamping spring is engaged with the third mounting groove.

9. The tool changing and stacking alarm device according to claim 1, characterized in that: The knife seat comprises: The knife seat cup is a cylindrical structure with two ends open, the knife seat core is slidably connected to the knife seat cup, and the bottom end of the knife seat cup is connected to the micro-travel switch; and The tool seat cover is detachably connected to the top of the tool seat cup, and is used to close the top of the tool seat cup to form an active cavity. The top of the tool seat core passes through and extends from the tool seat cover, and the tool seat cover is used to limit the position of the tool seat core.

10. The tool changing and stacking alarm device according to claim 9, characterized in that: The knife seat cup comprises: A first fixed end is located at the top of the knife seat cup, the top of the first fixed end is engaged with the knife seat cover, and the bottom of the first fixed end is used to install the knife changing and stacking alarm device; A second fixed end is located in the middle of the knife seat cup; and A third fixed end is located at the bottom end of the knife seat cup, and an external thread is arranged on the outer side of the third fixed end; Wherein, the micro-travel switch is threadedly connected to the third fixed end through a fixing nut, and the outer wall of the second fixed end is flush with the outer wall of the fixing nut.

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