A device for quick change of lathe tools

Abstract

The present application belongs to the technical field of quick tool changer, and particularly relates to a device for quickly replacing lathe tools, comprising a fixing base, a connecting base, a tool changer and a fixing assembly; the tool changer comprises a tool fixing frame and a tool changing seat, one end of the tool fixing frame is hingedly connected with the tool changing seat, a spring pin is arranged on the tool changing seat, and the other end of the tool fixing frame is provided with a connecting groove matched with the spring pin; a limiting assembly is arranged on the tool changing seat to limit the rotation amplitude of the tool fixing frame; the fixing base is located above the connecting base, and the fixing base and the connecting base are connected through a spring assembly. When the feeding amount is too large, the rotating workpiece will exert a large downward pressure on the tool on the tool fixing frame, so that the spring pin is separated from the connecting groove, and the tool and the tool fixing frame are rotated, thereby avoiding the tool collision accident between the tool and the workpiece.

Description

Technical Field

[0001] This invention belongs to the field of quick tool changer technology, specifically relating to a device for quickly changing lathe tools. Background Technology

[0002] In lathe machining, frequent tool changes and precise tool setting are the core pain points, while sudden tool collision accidents are even more serious safety hazards: traditional tool holders lack overload protection mechanisms. When the feed rate is too large or the feed speed is too fast, the tool will collide hard with the rotating workpiece, which may damage the tool and workpiece or even damage the machine tool spindle.

[0003] Existing technologies typically use bolts to directly tighten and secure the tool holder to the slide. Each time a tool is changed, the bolts must be loosened, the old tool removed, and the new tool installed. Then, the slide must be moved again, and the tool must be set using a tailstock center or a trial cut. This tool changing process is cumbersome, and the repeated tightening and loosening of the bolts is time-consuming and labor-intensive, significantly reducing the cycle time of mass production. The tool setting process requires multiple slide movements and repeated measurements of the tool tip height, resulting in significant manual intervention and large errors.

[0004] Although existing quick-change tool holders can be pre-loaded with multiple tools, they still need to be set up one by one, the slide moves back and forth frequently, and it is difficult to guarantee the consistency of the tool setting reference. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention provides a device for quickly changing lathe cutting tools, which can reduce damage to the lathe caused by tool collisions.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A device for quick changing lathe tools includes a fixed base, a connecting base, a tool changer, and a fixing assembly; the tool changer includes a tool holder and a tool change seat, one end of the tool holder is hinged to the tool change seat, the tool change seat is provided with a spring pin, and the other end of the tool holder is provided with a connecting groove that mates with the spring pin; the tool change seat is provided with a limiting assembly to limit the rotation range of the tool holder.

[0008] An adjusting plate is fixedly connected to the tool changer, and an adjusting screw is threaded onto the adjusting plate; the lower end of the adjusting screw abuts against the top of the fixed base.

[0009] The fixed seat is located above the connecting base, and the fixed seat and the connecting base are connected by a spring assembly. The bottom of the fixed seat and the top of the connecting base are provided with interlocking limiting teeth; the tool changer is fixedly connected to the fixed seat by a fixing assembly.

[0010] The spring pin includes a pin body, a spring, and a plug; the tool changer is provided with a stepped through hole, and the end of the pin body is provided with a limiting edge; the pin body is slidably connected to the stepped through hole, the plug is threadedly connected to the stepped through hole, and the two ends of the spring abut against the pin body and the plug, respectively.

[0011] The limiting assembly includes a limiting plate and a limiting pin. The limiting plate is fixedly connected to the tool changer, and the limiting pin is fixedly connected to the limiting plate. The limiting pin is located above the tool holder.

[0012] The spring assembly includes a lock nut, a connecting rod, and a compression spring; both the fixed seat and the connecting base are sleeved on the connecting rod; the lower end of the connecting rod is threaded to the lathe slide; the lock nut is threaded to the upper end of the connecting rod; the compression spring is sleeved on the connecting rod, and both ends of the compression spring abut against the lock nut and the fixed seat respectively; a pressure plate is threaded to the bottom of the connecting rod, and the pressure plate presses the connecting base.

[0013] The bottom of the connecting base is provided with a positioning protrusion.

[0014] The fixing assembly includes a connecting shaft, a support plate, and a connecting plate; the connecting shaft is rotatably connected to the support plate, and a handle is fixedly connected to the upper end of the connecting shaft; a cam is fixed in the middle of the connecting shaft, and the cam contacts the inner surface of the connecting plate; both ends of the connecting plate are respectively connected to the tool changer via the connecting assembly.

[0015] The fixed base is provided with a connecting ring groove, the front end of the support plate extends into the connecting ring groove, the upper end of the connecting shaft is rotatably connected to the fixed plate, and the fixed plate is threaded with a fixing screw; the top of the fixed base is provided with a ring groove, and the lower end of the fixing screw extends into the ring groove.

[0016] The connecting assembly includes a plug-in plate and an adjusting screw; the plug-in plate is plugged into the tool changer; one end of the adjusting screw is fixedly connected to the plug-in plate, and the other end of the adjusting screw is fixedly connected to the connecting plate through a pair of fixing nuts; an open-end clamping plate is fixedly connected to the connecting plate, and a groove that mates with the open-end clamping plate is provided on the connecting shaft.

[0017] It also includes a tool setting assembly; the tool setting assembly includes a fixing ring, a crossbar and a tool setting rod, the fixing ring is slidably connected to the top of the fixing seat, and the crossbar is fixedly connected to the fixing ring; a support screw is threaded onto the crossbar, and the lower end of the support screw abuts against the top of the fixing seat; a support column is fixedly connected to the crossbar, and a connecting ring is fixedly connected to one end of the tool setting rod, with the connecting ring sleeved outside the support column.

[0018] The tool setting bar is L-shaped; a level bubble is provided on the tool setting bar.

[0019] Compared with the prior art, the beneficial effects of this invention are:

[0020] A spring pin structure is installed between the tool holder and the tool changer, and a limit tooth and compression spring structure is installed between the fixed seat and the connecting base; when the feed rate is too large and / or the feed speed is too fast, it can instantly give way to prevent damage to the tool, workpiece and machine tool.

[0021] When the feed rate is too large and / or the feed speed is too fast, if the downward pressure applied to the tool is too great, the spring pin will separate from the connecting groove and drive the tool and the tool holder to rotate, thereby avoiding a collision between the tool and the workpiece. If the thrust applied to the tool is too great, it will overcome the resistance of the spring assembly and cause the holder to rotate, reducing the damage after a collision.

[0022] A detachable tool setting component is added. After the initial tool setting, the horizontal tool setting bar is used as the reference. Subsequent tool changes only require lightly touching the tool tip to the tool setting bar and leveling it, avoiding frequent movement of the slide and thus ensuring that the reference for subsequent tool setting is consistent with the reference after the initial tool setting. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the split structure of the present invention in one direction;

[0024] Figure 2 This is a schematic diagram of the split structure in another direction of the present invention;

[0025] Figure 3 yes Figure 1 A partial sectional view of the structure shown;

[0026] Figure 4 This is a cross-sectional view of the present invention in use;

[0027] Figure 5 This is a schematic diagram of the tool changer structure of the present invention;

[0028] Figure 6 This is a top view of the present invention;

[0029] Figure 7 This is a schematic diagram of the connection structure between the connecting shaft and the connecting plate of the present invention;

[0030] Figure 8 This is a schematic diagram of the connection structure between the connecting plate and the connecting assembly of the present invention;

[0031] Figure 9 This is a schematic diagram of the tool setting assembly of the present invention;

[0032] Figure 10 This is a schematic diagram of the tool assembly in use according to the present invention;

[0033] Wherein: 1 is a fixed base, 100 is a connecting ring groove, 101 is a ring groove, 102 is a slot, 103 is a connecting cylinder, 2 is a connecting base, 20 is a positioning protrusion, 3 is a tool changer, 30 is a tool holder, 31 is a tool changer seat, 32 is a connecting groove, 33 is a tooth, 34 is a insertion hole, 4 is a tool, 5 is a spring pin, 50 is a pin body, 51 is a spring, 52 is a plug, 6 is a limiting assembly, 60 is a limiting plate, 61 is a limiting pin, 7 is a spring assembly, 70 is a lock nut, 71 is a connecting rod, 72 is a clamping spring, 73 is a pressure plate, 8 is a limiting tooth, and 9 is a fixing assembly. 90 is the connecting shaft, 91 is the support plate, 92 is the connecting plate, 93 is the handle, 94 is the cam, 95 is the fixing plate, 96 is the fixing screw, 10 is the adjusting plate, 11 is the adjusting screw, 12 is the lathe slide, 13 is the connecting assembly, 130 is the plug-in plate, 131 is the adjusting screw, 132 is the fixing nut, 133 is the open clamping plate, 134 is the clamping groove, 135 is the plug-in protrusion, 14 is the tool setting assembly, 140 is the fixing ring, 141 is the crossbar, 142 is the tool setting rod, 143 is the support screw, 144 is the support column, 145 is the connecting ring, and 146 is the spirit level. Detailed Implementation

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] like Figures 1 to 5 As shown, a device for quickly changing lathe tools includes a fixed base 1, a connecting base 2, a tool changer 3, and a fixing assembly 9. The tool changer 3 includes a tool holder 30 and a tool holder 31. The tool holder 30 is provided with a groove and a fixing bolt. The tool 4 is installed into the groove, and then the fixing bolt is tightened to press the tool 4.

[0036] The purpose of the tool changer 3 is to enable rapid replacement of different types of tools 4 and simplify the tool setting process. Specifically, an adjusting plate 10 is fixedly connected to the tool changer 31, and an adjusting screw 11 is threaded onto the adjusting plate 10; the lower end of the adjusting screw 11 abuts against the top of the fixed base 1. By rotating the adjusting screw 11, its extension length can be changed, thereby changing the height of the tool changer 31, the tool holder 30, and the tools 4 on it, thus achieving tool setting.

[0037] Different types of cutting tools 4 are respectively mounted on the tool holder 30 of the tool changer 3. Before use, the different types of cutting tools 4 are respectively set by rotating the adjusting screw 11. That is, all cutting tools 4 are mounted on the tool holder 30 and set before machining.

[0038] When changing to a different type of tool 4, simply connect the tool changer 31 of the tool changer 3 to the fixed base 1 via the fixing component 9 to complete the replacement of different types of tools 4. Furthermore, since the tool 4 has already been pre-set, machining can proceed directly after replacement.

[0039] One end of the tool holder 30 is hinged to the tool changer 31, and the tool changer 31 is provided with a spring pin 5. The other end of the tool holder 30 is provided with a connecting groove 32 that cooperates with the spring pin 5.

[0040] Under normal cutting conditions, the spring pin 5 is connected to the connecting groove 32. When the feed rate (depth of cut per cut) is too large and / or the feed speed is too fast, the rotating workpiece will exert a large downward pressure on the tool 4 on the tool holder 30, thereby causing the spring pin 5 to separate from the connecting groove 32 and causing the tool 4 and the tool holder 30 to rotate, thus forming an active avoidance and reducing the damage caused by the tool collision accident.

[0041] A limiting component 6 is provided on the tool changer 31. When the tool 4 and the tool holder 30 rotate, the limiting component 6 will limit the rotation range of the tool holder 30 to prevent the tool holder 30 from rotating excessively and colliding with the workpiece again.

[0042] The fixed base 1 and the connecting base 2 are connected by a spring assembly 7, and the fixed base 1 and the connecting base 2 are mounted on the lathe slide 12 by the spring assembly 7. Interlocking limiting teeth 8 are provided at the bottom of the fixed base 1 and the top of the connecting base 2.

[0043] Under normal cutting conditions, the bottom of the fixed seat 1 and the top limiting teeth 8 of the connecting base 2 are in an engaged state. When the feed rate is too large and / or the feed speed is too fast, the tool 4 is subjected to a large thrust, which will overcome the resistance of the spring assembly 7 and cause the fixed seat 1 to rotate (the limiting teeth 8 first separate and then re-engage), which will also form an active avoidance and reduce the damage caused by the tool collision accident.

[0044] Furthermore, such as Figure 3 As shown, the spring pin 5 includes a pin body 50, a spring 51, and a plug 52. A stepped through hole is provided on the tool changer 31, and a limiting edge is provided at the end of the pin body 50. The limiting edge abuts against the step of the stepped through hole, thus preventing the pin body 50 from dislodging. The pin body 50 is slidably connected to the stepped through hole, and the front end of the pin body 50 can pass through the stepped through hole and extend into the connecting groove 32. The plug 52 is threadedly connected to the stepped through hole, and both ends of the spring 51 abut against the pin body 50 and the plug 52, respectively. During installation, the pin body 50 and the spring 51 are inserted into the stepped through hole, and finally the plug 52 is tightened.

[0045] Furthermore, such as Figure 1As shown, the limiting assembly 6 includes a limiting plate 60 and a limiting pin 61. The limiting plate 60 is fixedly connected to the tool changer 31, and the limiting pin 61 is fixedly connected to the limiting plate 60. The limiting pin 61 is horizontally positioned above the tool holder 30. When the tool 4 and the tool holder 30 rotate, the limiting pin 61 will block the tool holder 30, thereby limiting the rotation angle of the tool holder 30 and preventing it from rotating excessively.

[0046] Furthermore, such as Figure 2 As shown, the spring assembly 7 includes a lock nut 70, a connecting rod 71, and a compression spring 72. The fixed seat 1 and the connecting base 2 are both sleeved on the connecting rod 71; the lower end of the connecting rod 71 is threadedly connected to the lathe slide 12.

[0047] The lock nut 70 is threaded to the upper end of the connecting rod 71. The compression spring 72 is sleeved on the outside of the connecting rod 71, and its two ends abut against the lock nut 70 and the fixed seat 1, respectively. After the lock nut 70 is tightened, the compression spring 72 is in a compressed state.

[0048] A pressure plate 73 is threaded to the bottom of the connecting rod 71. The pressure plate 73 presses the connecting base 2 to fix the connecting base 2.

[0049] The specific installation process is as follows: First, thread the lower end of the connecting rod 71 to the lathe slide 12. Then, put the connecting base 2 on the outside of the connecting rod 71. Next, thread the pressure plate 73 to the connecting rod 71 so that the pressure plate 73 presses the connecting base 2. Finally, put the fixing seat 1 and the clamping spring 72 on the outside of the connecting rod 71 in sequence and tighten the lock nut 70.

[0050] Under normal cutting conditions, the bottom of the fixed seat 1 and the top limiting teeth 8 of the connecting base 2 will be engaged under the action of the clamping spring 72. When the feed rate is too large and / or the feed speed is too fast, the tool 4 will be subjected to a large thrust, which will overcome the resistance of the clamping spring 72 and cause the fixed seat 1 to rotate.

[0051] Furthermore, such as Figure 4 As shown, a positioning protrusion 20 is provided at the bottom of the connecting base 2; a corresponding positioning hole is provided on the lathe slide 12. During installation, the positioning protrusion 20 of the connecting base 2 is inserted into the positioning hole; after tightening the pressure plate 73, the connecting base 2 can be effectively prevented from rotating.

[0052] Furthermore, such as Figure 3 and Figure 6As shown, the fixing assembly 9 includes a connecting shaft 90, a support plate 91, and a connecting plate 92; the connecting shaft 90 is rotatably connected to the support plate 91, and a handle 93 is fixedly connected to the upper end of the connecting shaft 90; the connecting shaft 90 can be driven to rotate by holding the handle 93. A cam 94 is fixed in the middle of the connecting shaft 90, and the cam 94 contacts the inner surface of the connecting plate 92; both ends of the connecting plate 92 are connected to the tool changer 31 through the connecting assembly 13.

[0053] The fixed base 1 is provided with a connecting ring groove 100, and the upper end of the connecting shaft 90 is rotatably connected to a fixing plate 95. During installation, first, the front end of the support plate 91 is inserted into the connecting ring groove 100; then, the fixing screw 96 threaded on the fixing plate 95 is tightened, so that the lower end of the fixing screw 96 extends into the ring groove 101 at the top of the fixed base 1. Through the above structure, the connecting shaft 90 is "hung" on the fixed base 1.

[0054] Specifically: the tool changer 31 is inserted into the fixed base 1; a ring of slots 102 is provided on the fixed base 1, and corresponding insert teeth 33 are provided on the tool changer 31.

[0055] The tool changer 31 is installed as follows: First, insert the tool changer 31 into the fixed base 1, and then connect the connecting assembly 13 to the tool changer 31. After the above connection is completed, the handle 93 drives the connecting shaft 90 and the cam 94 to rotate. As the cam 94 rotates, it pushes the connecting plate 92 to move outward, causing the connecting assembly 13 to tighten the tool changer 31 until the most protruding position of the cam 94 contacts the connecting plate 92. At this point, the tool changer 31 can be fixed to the fixed base 1, restricting the movement of the tool changer 31.

[0056] When it is necessary to change to a different type of tool 4, taking the change from an external round tool to a grooving tool as an example: first, drive the connecting shaft 90 and cam 94 to rotate via the handle 93, so that the most prominent position of cam 94 is away from the connecting plate 92; at this time, the connecting assembly 13 no longer tightens the tool changer 31, and the existing tool changer 31 (on which the external round tool is installed) can be removed. Then, according to the above installation method, connect the tool changer 31 with the grooving tool installed to the fixed base 1.

[0057] Furthermore, such as Figure 6 and Figure 7As shown, the connecting assembly 13 includes a plug-in plate 130 and an adjusting screw 131. The plug-in plate 130 is plugged into the tool changer 31, and the end of the plug-in plate 130 is provided with a plug-in protrusion 135. The tool changer 31 is provided with a corresponding plug-in hole 34. One end of the adjusting screw 131 is fixedly connected to the plug-in plate 130, and the other end of the adjusting screw 131 is fixedly connected to the connecting plate 92 through a pair of fixing nuts 132. Specifically, the other end of the adjusting screw 131 is passed through the connecting plate 92, and then the pair of fixing nuts 132 are rotated to make the two fixing nuts 132 move relative to each other. The two fixing nuts 132 clamp the connecting plate 92, thereby achieving a fixed connection between the adjusting screw 131 and the connecting plate 92.

[0058] When it is necessary to change to a different type of tool 4, the tool changer 31 is inserted into the fixed base 1, and the insertion protrusion 135 on the insertion plate 130 is inserted into the insertion hole 34 of the tool changer 31.

[0059] When the cam 94 makes contact with the connecting plate 92 at its most prominent position, and the tool changer 31 still wobbles, the fixing nut 132 on the left side can be rotated to create a gap between it and the connecting plate 92. Then, the fixing nut 132 on the right side can be rotated to push the connecting plate 92 to move until the tool changer 31 is fixed. Finally, the fixing nut 132 on the left side can be rotated in the opposite direction to move it towards the fixing nut 132 on the right side, and finally clamp the connecting plate 92.

[0060] By using the above-mentioned structure of adjusting screw 131 and a pair of fixing nuts 132, the defect that the tool changer 31 still wobbles after the most prominent position of cam 94 contacts the connecting plate 92 can be overcome.

[0061] Furthermore, such as Figure 7 and Figure 8 As shown, an open-end clamping plate 133 is fixedly connected to the connecting plate 92. The open-end clamping plate 133 has a strip-shaped hole, and one end of it is open. The connecting shaft 90 has a groove 134 that mates with the open-end clamping plate 133. During installation, the open structure of the open-end clamping plate 133 is aligned with the groove 134, and then the connecting plate 92 is pushed to move, so that the open-end clamping plate 133 engages with the groove 134. When the open-end clamping plate 133 engages with the groove 134, the axial movement of the connecting plate 92 relative to the connecting shaft 90 is restricted, but due to the oblong hole, the radial movement of the connecting plate 92 is not restricted.

[0062] Furthermore, the existing quick-change tool post 3 has the following tool setting method: first, a center is installed on the lathe tailstock; then, the lathe slide 12 is driven to move to the center; then, the extension length is changed by rotating the adjusting screw 11 so that the tip of the tool 4 is flush with the center, thereby completing the tool setting.

[0063] Since different types of cutting tools 4 all need to be set before use, but the above operation is required every time the tool is set, it is inconvenient; especially when the lathe slide 12 needs to be operated frequently.

[0064] like Figure 9 and 10 As shown, it also includes a tool setting assembly 14; the tool setting assembly 14 includes a retaining ring 140, a crossbar 141, and a tool setting rod 142, with the retaining ring 140 slidably connected to the top of the fixed base 1. Specifically, a connecting cylinder 103 is fixedly connected to the top of the fixed base 1, and the retaining ring 140 is sleeved on the outside of the connecting cylinder 103, thus achieving a slidable connection between the retaining ring 140 and the top of the fixed base 1. When tool setting is required, the retaining ring 140 is sleeved on the outside of the connecting cylinder 103; after tool setting is completed, the two are separated, i.e., the tool setting assembly 14 is removed.

[0065] A crossbar 141 is fixedly connected to a retaining ring 140. A support screw 143 is threaded onto the crossbar 141, and the lower end of the support screw 143 abuts against the top of the retaining seat 1. By rotating the support screw 143 to change its insertion length, the height of the retaining ring 140 can be changed. A support column 144 is fixedly connected to the crossbar 141, and a connecting ring 145 is fixedly connected to one end of the tool holder 142. The connecting ring 145 is sleeved on the support column 144. The connecting ring 145 can rotate along the support column 144 and move axially.

[0066] During tool setting, first perform tool setting according to the existing quick-change tool holder 3 tool setting method. After tool setting is completed, operate the slide to reset it; then place the tool setting lever 142 on the tip of the tool 4, and finally rotate the support screw 143 to make the tool setting lever 142 horizontal.

[0067] When performing tool setting for other types of tools, there is no need to move the lathe slide 12 to the center position; simply place the tool setting bar 142 on the tip of the tool 4 to be set; then turn the adjusting screw 11 to change its extension length so that the tool setting bar 142 is in a horizontal state, thus completing the tool setting.

[0068] Furthermore, such as Figure 9 As shown, the tool setting shank 142 is L-shaped. To facilitate observation of the levelness, a spirit level 146 is provided on the tool setting shank 142.

[0069] The above description only illustrates preferred embodiments of the present invention, but the present invention is not limited to the above embodiments.

Claims

1. A device for quickly changing lathe cutting tools, characterized in that: It includes a fixed base (1), a connecting base (2), a tool changer (3), and a fixing component (9); the tool changer (3) includes a tool holder (30) and a tool changer seat (31), one end of the tool holder (30) is hinged to the tool changer seat (31), the tool changer seat (31) is provided with a spring pin (5), and the other end of the tool holder (30) is provided with a connecting groove (32) that cooperates with the spring pin (5); the tool changer seat (31) is provided with a limiting component (6), which limits the rotation range of the tool holder (30); An adjusting plate (10) is fixedly connected to the tool changer (31), and an adjusting screw (11) is threaded onto the adjusting plate (10); the lower end of the adjusting screw (11) abuts against the top of the fixed seat (1); The fixed seat (1) is located above the connecting base (2). The fixed seat (1) and the connecting base (2) are connected by a spring assembly (7). The bottom of the fixed seat (1) and the top of the connecting base (2) are provided with intermeshing limiting teeth (8). The tool changer (31) is fixedly connected to the fixed seat (1) by a fixing assembly (9).

2. The device for quick changing lathe tools according to claim 1, characterized in that: The spring pin (5) includes a pin body (50), a spring (51) and a plug (52); the tool changer (31) is provided with a stepped through hole, and the end of the pin body (50) is provided with a limiting edge; the pin body (50) is slidably connected to the stepped through hole, the plug (52) is threadedly connected to the stepped through hole, and the two ends of the spring (51) abut against the pin body (50) and the plug (52) respectively.

3. The device for quick changing lathe tools according to claim 1, characterized in that: The limiting component (6) includes a limiting plate (60) and a limiting pin (61). The limiting plate (60) is fixedly connected to the tool changer (31), and the limiting pin (61) is fixedly connected to the limiting plate (60). The limiting pin (61) is located above the tool holder (30).

4. The device for quick changing lathe tools according to claim 1, characterized in that: The spring assembly (7) includes a lock nut (70), a connecting rod (71), and a compression spring (72); the fixed seat (1) and the connecting base (2) are both sleeved on the connecting rod (71); the lower end of the connecting rod (71) is threaded to the lathe slide (12); the lock nut (70) is threaded to the upper end of the connecting rod (71); the compression spring (72) is sleeved on the connecting rod (71); the two ends of the compression spring (72) abut against the lock nut (70) and the fixed seat (1) respectively; the bottom of the connecting rod (71) is threaded with a pressure plate (73), which presses the connecting base (2) by the pressure plate (73).

5. The device for quick changing lathe tools according to claim 4, characterized in that: The bottom of the connecting base (2) is provided with a positioning protrusion (20).

6. The device for quick changing lathe tools according to claim 1, characterized in that: The fixing component (9) includes a connecting shaft (90), a support plate (91), and a connecting plate (92); the connecting shaft (90) is rotatably connected to the support plate (91), and a handle (93) is fixedly connected to the upper end of the connecting shaft (90); a cam (94) is fixed in the middle of the connecting shaft (90), and the cam (94) contacts the inner surface of the connecting plate (92); the two ends of the connecting plate (92) are respectively connected to the tool changer (31) through the connecting component (13); The fixed base (1) is provided with a connecting ring groove (100), the front end of the support plate (91) extends into the connecting ring groove (100), the upper end of the connecting shaft (90) is rotatably connected to a fixed plate (95), and a fixing screw (96) is threadedly connected to the fixed plate (95); the top of the fixed base (1) is provided with a ring groove (101), and the lower end of the fixing screw (96) extends into the ring groove (101).

7. The device for quick changing lathe tools according to claim 6, characterized in that: The connecting assembly (13) includes a plug plate (130) and an adjusting screw (131); the plug plate (130) is plugged into the tool changer (31); one end of the adjusting screw (131) is fixedly connected to the plug plate (130), and the other end of the adjusting screw (131) is fixedly connected to the connecting plate (92) through a pair of fixing nuts (132); an open card plate (133) is fixedly connected to the connecting plate (92), and a slot (134) that mates with the open card plate (133) is provided on the connecting shaft (90).

8. The device for quick changing lathe tools according to claim 1, characterized in that: It also includes a tool setting assembly (14); the tool setting assembly (14) includes a retaining ring (140), a crossbar (141) and a tool setting bar (142), the retaining ring (140) is slidably connected to the top of the fixed seat (1), and the crossbar (141) is fixedly connected to the retaining ring (140); a support screw (143) is threaded on the crossbar (141), and the lower end of the support screw (143) abuts against the top of the fixed seat (1); a support column (144) is fixedly connected on the crossbar (141), and a connecting ring (145) is fixedly connected to one end of the tool setting bar (142), and the connecting ring (145) is sleeved on the support column (144).

9. The device for quick changing lathe tools according to claim 8, characterized in that: The tool setting bar (142) is L-shaped; a level bubble (146) is provided on the tool setting bar (142).

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