A tool lifting and feeding device for a large-stroke broaching machine

Abstract

The present invention discloses a tool lifting and feeding device for a long-stroke broaching machine, comprising: an auxiliary slide, located on the upper side of a main slide, for clamping the top of a broaching tool; a first mounting seat, located on the upper side of the auxiliary slide, provided with a tool lifting and feeding cylinder, the output end of which is connected to the auxiliary slide for driving the auxiliary slide to rise and fall; a second mounting seat, located on the upper side of the first mounting seat, provided with a tool adjustment mechanism for driving the first mounting seat to rise and fall, the tool adjustment mechanism comprising a driving member, a trapezoidal screw driven to rotate by the driving member, and a nut sleeve threadedly engaged with the trapezoidal screw, the nut sleeve being mounted on the first mounting seat; an adjustment cylinder, provided on the main slide, the output end of which is connected to the second mounting seat for driving the second mounting seat to rise and fall. The tool lifting and feeding device for a long-stroke broaching machine of the present invention can meet the adjustment requirements of tools with a wide range of lengths and has high safety.

Description

Technical Field

[0001] The present invention relates to the technical field of broaching machine equipment, in particular to a tool lifting and feeding device for a large-stroke broaching machine. Background Art

[0002] Vertical broaching machines are a type of processing equipment widely used by machinery manufacturing companies. The broaching machine is equipped with a tool lifting and feeding device. Traditional tool lifting and feeding devices usually need to have two functions: one is to realize the lifting of the tool (brroach), and the other is to realize the adjustment of the height of the upper tool clamp used to clamp the top of the tool in the initial state before processing, so as to cope with the adjustment of tools of different lengths. When replacing a short tool, the upper tool clamp needs to be lowered in the initial state before processing. When replacing a long tool, the upper tool clamp needs to be raised in the initial state before processing so that there is appropriate space between the upper tool clamp and the bed platform (where the workpiece is placed) to install the broach. However, the traditional tool lifting and feeding device usually has a relatively small adjustment stroke and cannot meet the adjustment of tools with a large length range, and has a narrow scope of application. In addition, the traditional tool lifting and feeding device also lacks an anti-fall device, which is not safe enough. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a tool lifting and feeding device for a long-stroke broaching machine, which can meet the adjustment requirements of tools with a wide range of lengths and has high safety.

[0004] According to an embodiment of the present invention, the tool lifting device of a large-stroke broaching machine is installed on a bed, and a main slide that can be raised and lowered is provided on the bed, including: an auxiliary slide, located on the upper side of the main slide, for clamping the top of the broach; a first mounting seat, located on the upper side of the auxiliary slide, provided with a tool lifting cylinder, the output end of the tool lifting cylinder is connected to the auxiliary slide, for driving the auxiliary slide to rise and fall; a second mounting seat, located on the upper side of the first mounting seat, provided with a tool adjustment mechanism for driving the first mounting seat to rise and fall, the tool adjustment mechanism including a driving member, a trapezoidal screw driven to rotate by the driving member, and a nut sleeve threadedly matched with the trapezoidal screw, the nut sleeve being installed on the first mounting seat; an adjusting cylinder, provided on the main slide, the output end of the adjusting cylinder being connected to the second mounting seat, for driving the second mounting seat to rise and fall.

[0005] The tool lifting and feeding device for a long-stroke broaching machine according to the embodiment of the present invention has at least the following beneficial effects:

[0006] By setting a knife lifting and feeding cylinder to drive the auxiliary slide to rise and fall, the lifting and feeding of the broach can be achieved during the processing. By setting a tool adjustment mechanism and an adjustment cylinder, in the initial state before processing, the second mounting seat is driven to rise and fall by the adjustment cylinder and the first mounting seat is driven to rise and fall by the tool adjustment mechanism, so that the initial height of the first mounting seat can be adjusted, that is, the initial height of the auxiliary slide with the upper tool clamp can be adjusted, thereby meeting the installation and use of broaches of different lengths. Since the adjustment cylinder and the tool adjustment mechanism are used for adjustment, the adjustment stroke is the sum of the adjustment strokes of the adjustment cylinder and the tool adjustment mechanism. The cooperation of the two can achieve the adjustment of broaches with a large length range, thereby improving the applicability of the equipment. In addition, the tool adjustment mechanism adopts a trapezoidal lead screw, and the structure of the trapezoidal lead screw itself has a self-locking function, so it can also reduce the risk of falling during the tool lifting and adjustment process, and has high safety.

[0007] According to some embodiments of the present invention, it further includes a vertically extending guide rail provided on the bed, a slider is slidably provided on the guide rail, and the auxiliary slide plate, the first mounting seat, and the second mounting seat are all connected to the slider to be slidably mounted on the guide rail.

[0008] According to some embodiments of the present invention, the upper end of the auxiliary slide is provided with a first buffer block for buffering against the lower end of the first mounting seat, and the upper end of the first mounting seat is provided with a second buffer block for buffering against the lower end of the second mounting seat.

[0009] According to some embodiments of the present invention, the output shaft of the adjusting cylinder is fixedly connected to a connecting rod, a support seat is provided on the top of the connecting rod, the second mounting seat is provided with a first through-hole and is sleeved on the connecting rod through the first through-hole, and the bottom end of the second mounting seat is supported against the upper surface of the support seat.

[0010] According to some embodiments of the present invention, a first sensing device is provided on the second mounting seat for detecting upward sliding of the second mounting seat relative to the connecting rod.

[0011] According to some embodiments of the present invention, the auxiliary slide is provided with a second vertically penetrating through-hole, and the output shaft of the knife lifting cylinder can be relatively vertically slidably penetrated through the second through-hole. The output shaft of the knife lifting cylinder is provided with a first limiting structure for supporting and limiting the auxiliary slide on the lower side of the second through-hole, and a first spring for applying a downward elastic force to the auxiliary slide is provided on the upper side of the second through-hole.

[0012] According to some embodiments of the present invention, the output shaft of the knife lifting cylinder is provided with a first abutment ring on the upper side of the auxiliary slide, and the upper and lower ends of the first spring respectively abut against the first abutment ring and the auxiliary slide.

[0013] According to some embodiments of the present invention, the first abutment ring is sleeved on the output shaft of the knife lifting cylinder, and the output shaft of the knife lifting cylinder has a step surface for abutting and limiting against the upper surface of the first abutment ring.

[0014] According to some embodiments of the present invention, a third through-hole running vertically is provided on the first mounting seat, the nut sleeve can be slidably passed through the third through-hole relatively vertically, the nut sleeve is provided with a second limiting structure on the lower side of the third through-hole for supporting and limiting the first mounting seat, and a second spring is provided on the upper side of the third through-hole for applying a downward elastic force to the first mounting seat.

[0015] According to some embodiments of the present invention, the third perforated peripheral wall is provided with a limiting groove extending outward, the limiting groove is open at both upper and lower ends, a limiting block is connected to the peripheral wall of the nut sleeve, the limiting block can be embedded in the limiting groove for relative vertical sliding, and the limiting groove is used to cooperate with the limiting block to limit the rotation of the nut sleeve relative to the first mounting seat.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0018] Figure 1 This is a schematic diagram of the installation structure of an embodiment of the present invention on a bed;

[0019] Figure 2 It is a structural diagram of an embodiment of the present invention;

[0020] Figure 3 2. It is a schematic diagram of the connection structure between the first mounting base and the auxiliary slide plate according to an embodiment of the present invention;

[0021] Figure 4 It is a schematic diagram of the connection structure between the first mounting seat and the nut sleeve in an embodiment of the present invention.

[0022] Figure Number:

[0023] The bed 100 , the main slide 110 , the lower tool holder 111 , the guide rail 120 , the slider 130 , the bed platform 140 , and the guide sleeve 150 .

[0024] Auxiliary slide 200, first buffer block 201, second through hole 202, upper tool holder 210;

[0025] Broach 300;

[0026] First mounting seat 400 , second buffer block 401 , third through hole 402 , limiting groove 403 , knife lifting cylinder 410 , first limiting structure 411 , first spring 412 , first abutting ring 413 , step surface 414 ;

[0027] Second mounting base 500 , first through-hole 501 , tool adjustment mechanism 510 , driving member 520 , trapezoidal lead screw 530 , nut sleeve 540 , second limiting structure 541 , second spring 542 , limiting block 543 , second abutting ring 544 , washer 545 , first sensing device 550 ;

[0028] Adjust the oil cylinder 600 , the connecting rod 610 , and the support seat 620 . DETAILED DESCRIPTION

[0029] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present invention, "a plurality" refers to more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] Reference Figures 1 to 3 As shown, a tool lifting and feeding device for a long-stroke broaching machine according to an embodiment of the present invention is installed on a bed 100. A main slide 110 that can be raised and lowered is provided on the bed 100. The tool lifting and feeding device for a long-stroke broaching machine includes: a main slide 110, an auxiliary slide 200, a first mounting seat 400, a second mounting seat 500, and an adjusting cylinder 600.

[0034] It should be noted that the bed 100 is provided with a driving device (not shown) for driving the main slide 110 to rise and fall, and the bed 100 is provided with a bed platform 140 between the main slide 110 and the auxiliary slide 200 for placing the workpiece. Obviously, the bed platform 140 is provided with a hole for the broach 300 to pass through; the main slide 110 is provided with a lower tool clamp 111 for clamping the bottom end of the broach 300.

[0035] The auxiliary slide 200 is located on the upper side of the main slide 110 and is used to clamp the top of the broach 300 ; specifically, an upper tool clamp 210 is provided on the auxiliary slide 200 to clamp the top of the broach 300 .

[0036] The first mounting base 400 is located above the auxiliary slide 200. A blade lift cylinder 410 is mounted on the first mounting base 400. The output end of the blade lift cylinder 410 is connected to the auxiliary slide 200. The blade lift cylinder 410 is used to drive the auxiliary slide 200 up and down, thereby driving the broach 300 up and down, thereby lifting the broach 300. It should be noted that in the initial state before machining, the output shaft of the blade lift cylinder 410 is retracted.

[0037] The second mounting seat 500 is located on the upper side of the first mounting seat 400. A tool adjustment mechanism 510 is provided on the second mounting seat 500 for driving the first mounting seat 400 to rise and fall. The tool adjustment mechanism 510 includes a driving member 520, a trapezoidal screw rod 530, and a nut sleeve 540. The driving member 520 is installed on the second mounting seat 500 and can adopt a motor. The trapezoidal screw rod 530 is rotatably arranged on the second mounting seat 500 and is driven to rotate by the driving member 520. The trapezoidal screw rod 530 is vertically arranged, and the nut sleeve 540 is threadedly matched with the trapezoidal screw rod 530, and the nut sleeve 540 is installed on the first mounting seat 400, so that the trapezoidal screw rod 530 is driven to rotate by the driving member 520, so as to drive the first mounting seat 400 to rise and fall through the nut sleeve 540.

[0038] The adjustment cylinder 600 is mounted on the main slide 110 and can be raised and lowered along with the main slide 110. The output end of the adjustment cylinder 600 is connected to the second mounting base 500, driving the second mounting base 500 to rise and fall. It is understood that when the second mounting base 500 rises or falls, the first mounting base 400 and the auxiliary slide 200 can also rise and fall synchronously. In this embodiment, two adjustment cylinders 600 are provided, one for connecting to the left and right ends of the second mounting base 500 to maintain balance.

[0039] Specifically, before processing, the broach 300 is clamped on the upper tool holder 210 so that the bottom end of the broach 300 is higher than the bed platform 140 to facilitate loading. After loading, the upper tool holder 210 is driven by the tool lifting cylinder 410 to move downward to escort the broach 300 until the bottom end of the broach 300 passes through the workpiece and is clamped into the lower tool holder 111. The bottom of the broach 300 is clamped by the lower tool holder 111. Then the main slide 110 moves downward, driving the second mounting seat 500, the first mounting seat 400, and the auxiliary slide 200 to move downward synchronously, so as to use the broach 300 to broach the workpiece. When it moves down to a certain extent, in order to avoid interference, the tool lifting cylinder 410 drives the auxiliary slide 200 to move upward. The top of the broach 300 is disengaged from the upper tool holder 210, and the broaching stops, while the main slide 110 continues to drive the broach 300 downward until broaching is completed. After broaching, the workpiece is unloaded, and then the broach 300 needs to be moved up to the upper side of the bed platform 140 for the next processing. At this time, the main slide 110 is first raised to drive the broach 300 upward, and then the tool lifting and feeding cylinder 410 drives the auxiliary slide 200 downward. The upper tool holder 210 clamps the top of the broach 300, and the lower tool holder 111 releases the tool. The tool lifting and feeding cylinder 410 then drives the upper tool holder 210 upward to lift the broach 300 and move it up to the upper side of the bed platform 140. The lifting and feeding of the broach 300 during the processing is achieved by the tool lifting and feeding cylinder 410, which is stable and reliable and can be used to lift and feed heavy broaches 300.

[0040] In order to use broaches 300 of different lengths, that is, to ensure that there is enough space between the upper tool holder 210 and the bed platform 140 in the initial state before processing to install the broach 300, this embodiment is provided with a tool adjustment mechanism 510 and an adjustment cylinder 600. In the initial state before processing, the second mounting seat 500 is driven to rise and fall by the adjustment cylinder 600, and the first mounting seat 400 is driven to rise and fall by the tool adjustment mechanism 510, so that the initial height of the first mounting seat 400 can be adjusted, that is, the initial height of the auxiliary slide 200 provided with the upper tool holder 210 is adjusted, thereby meeting the installation and use of broaches 300 of different lengths. Since this embodiment adopts two devices, the adjustment cylinder 600 and the tool adjustment mechanism 510, to adjust the tool, the adjustment stroke is the sum of the adjustment strokes of the adjustment cylinder 600 and the tool adjustment mechanism 510. The cooperation of the two can achieve the adjustment of broaches 300 with a large length range, thereby improving the applicability of the equipment. In addition, the tool adjustment mechanism 510 of this embodiment adopts a trapezoidal screw 530. Since the structure of the trapezoidal screw 530 itself has a self-locking function, it can also reduce the risk of falling during the tool lifting and adjustment process, and has high safety.

[0041] It is understandable that the tool adjustment mechanism 510 in this embodiment uses a trapezoidal screw 530, which can be used for tool adjustment and also has a self-locking and anti-falling function. However, when the length range of the broach 300 is very large, using only the trapezoidal screw 530 for adjustment means that the length of the trapezoidal screw 530 will also be very long. Then, when the main slide 110 drives the broach 300 to move downward to broach the workpiece, since the tool adjustment mechanism 510 will also descend, the trapezoidal screw 530 will easily interfere with the large workpiece. Therefore, this embodiment also provides an adjustment cylinder 600, which cooperates with the tool adjustment mechanism 510 to achieve tool adjustment. In addition, using only the trapezoidal screw 530 for adjustment is slow; in addition, if only the adjustment cylinder 600 is used for adjustment, its size and weight will be very large, which is not only inconvenient to layout, but also increases the load when the main slide 110 is raised and lowered, increasing the risk of equipment damage. The adjustment cylinder 600 and the tool adjustment mechanism 510 can mitigate the above shortcomings.

[0042] Reference Figure 1 and Figure 2 As shown, it can be understood that the tool lifting and feeding device of the large-stroke broaching machine embodiment of the present invention also includes a vertically extending guide rail 120 provided on the bed 100, and a slider 130 is slidably provided on the guide rail 120. The auxiliary slide 200, the first mounting seat 400, and the second mounting seat 500 are all connected to the slider 130 to be slidably mounted on the guide rail 120. By arranging the guide rail 120 and the slider 130, guidance is provided for the vertical movement of the auxiliary slide 200, the first mounting seat 400, and the second mounting seat 500; specifically, in this embodiment, two guide rails 120 are provided, which are symmetrically distributed with respect to the bed 100.

[0043] Reference Figure 2 and Figure 3 As shown, it can be understood that the upper end of the auxiliary slide 200 is provided with a first buffer block 201 for buffering against the lower end of the first mounting seat 400 to prevent the auxiliary slide 200 from being damaged by a hard collision with the first mounting seat 400 when the output shaft of the knife lifting cylinder 410 is retracted, and the upper end of the first mounting seat 400 is provided with a second buffer block 401 for buffering against the lower end of the second mounting seat 500 to prevent the first mounting seat 400 from being damaged by a hard collision with the second mounting seat 500 when the nut sleeve 540 is raised to a high position; it can be imagined that the first buffer block 201 and the second buffer block 401 can both be made of elastic materials such as rubber.

[0044] Reference Figure 1 and Figure 2As shown, it can be understood that the output shaft of the adjustment cylinder 600 is fixedly connected to the connecting rod 610, and a support seat 620 is provided on the top of the connecting rod 610. The second mounting seat 500 is provided with a first through-hole 501 and is sleeved on the connecting rod 610 through the first through-hole 501. The bottom end of the second mounting seat 500 is supported on the upper surface of the support seat 620, so that the second mounting seat 500 is placed on the support seat 620, so that the second mounting seat 500 and the connecting rod 610 are non-rigidly connected, so that during the broaching process, the vibration of the main slide 110 transmitted to the second mounting seat 500 via the connecting rod 610 can be reduced, that is, the vibration of the tool adjustment mechanism 510 on the second mounting seat 500 is reduced, thereby extending its service life. Specifically, when the second mounting seat 500 needs to be moved upward relative to the main slide 110, the output shaft of the adjustment cylinder 600 is extended, the support seat 620 pushes the second mounting seat 500 upward, and drives the first mounting seat 400 and the auxiliary slide 200 to move upward synchronously. When the second mounting seat 500 needs to be moved downward relative to the main slide 110, the output shaft of the adjustment cylinder 600 is retracted, and the second mounting seat 500, the first mounting seat 400, and the auxiliary slide 200 move downward synchronously using gravity. In addition, when the adjustment cylinder 600 is not working and the main slide 110 moves downward, due to the connection support of the connecting rod 610, the second mounting seat 500, the first mounting seat 400, and the auxiliary slide 200 will move downward synchronously with the main slide 110 due to gravity, thereby enabling the upper tool holder 210 to fully escort the broach 300 during the broaching process, thereby improving stability during broaching.

[0045] It is understandable that if Figure 1 As shown, the connecting rod 610 is relatively long. To prevent it from being damaged or misplaced, a guide sleeve 150 is further provided on the bed 100 for the connecting rod 610 to pass through. The guide sleeve 150 is slidably matched with the connecting rod 610 .

[0046] Reference Figure 2 As shown, it can be understood that a first sensing device 550 is provided on the second mounting seat 500 for detecting the upward sliding of the second mounting seat 500 relative to the connecting rod 610. Specifically, in this embodiment, the first sensing device 550 adopts a first proximity switch, and the first proximity switch is connected to the control system. When it detects that the second mounting seat 500 slides upward relative to the connecting rod 610, it sends a signal to the control system. The control system controls the equipment to stop working, so as to avoid the second mounting seat 500 sliding upward relative to the connecting rod 610 and disengaging from the connecting rod 610 due to operator error, thereby improving the safety performance of the equipment.

[0047] Reference Figure 3As shown, it can be understood that the auxiliary slide 200 is provided with a second through-hole 202 which passes vertically, and the output shaft of the knife-lifting cylinder 410 can be slidably penetrated in the second through-hole 202 relatively vertically, and the output shaft of the knife-lifting cylinder 410 can be detachably provided with a first limiting structure 411 for supporting the limiting auxiliary slide 200 on the lower side of the second through-hole 202 to prevent the auxiliary slide 200 from moving downward relative to the output shaft of the knife-lifting cylinder 410 and falling, and the output shaft of the knife-lifting cylinder 410 is detachably provided with a first limiting structure 411 for supporting the limiting auxiliary slide 200 on the lower side of the second through-hole 202 A first spring 412 is sleeved on the upper side of the auxiliary slide 200 to apply a downward elastic force to the auxiliary slide 200. This provides a flexible connection between the output shaft of the blade lifting cylinder 410 and the auxiliary slide 200. If an operator makes an error and the auxiliary slide 200 is subjected to an upward impact force, the first spring 412 provides a certain degree of cushioning, preventing damage to the blade lifting cylinder 410. Furthermore, the first spring 412 also has a reset function, returning the auxiliary slide 200 to its original position after the fault is resolved. It is understood that the first retaining structure 411 can take a variety of forms, such as nuts, pins, etc. This is a common configuration in the prior art. This embodiment is based on ensuring sufficient support strength and is not described in detail here. Furthermore, in this embodiment, the auxiliary slide 200 is also provided with a second sensing device. Specifically, the second sensing device is a second proximity switch that detects the sliding of the auxiliary slide 200 relative to the output shaft of the blade lifting cylinder 410 and sends a signal to the control system to stop the device and prevent damage.

[0048] Reference Figure 3 As shown, it can be understood that the output shaft of the knife lifting cylinder 410 is provided with a first abutment ring 413 on the upper side of the auxiliary slide 200, and the upper and lower ends of the first spring 412 are respectively abutted against the first abutment ring 413 and the auxiliary slide 200 to provide force support for the first spring 412.

[0049] Reference Figure 3 As shown, it can be understood that the first abutment ring 413 is sleeved on the output shaft of the knife lifting cylinder 410, and the output shaft of the knife lifting cylinder 410 has a step surface 414, which is used to abut and limit the upper surface of the first abutment ring 413, thereby providing force support for the upper end of the first spring 412. The structure is simple, stable and easy to install.

[0050] Reference Figure 2 and Figure 4As shown, it can be understood that the first mounting seat 400 is provided with a third through-hole 402 which passes vertically through it, and the nut sleeve 540 can be slidably penetrated in the third through-hole 402 relatively vertically, and the nut sleeve 540 is provided with a second limiting structure 541 on the lower side of the third through-hole 402 for supporting and limiting the first mounting seat 400, and a second spring 542 is provided on the upper side of the third through-hole 402 for applying a downward elastic force to the first mounting seat 400, so that the connection between the first mounting seat 400 and the nut sleeve 540 is a flexible connection. If the operator makes an operating error, causing the first mounting seat 400 to be subjected to an upward impact force, the second spring 542 can provide a certain buffer to prevent damage to the nut sleeve 540 and the trapezoidal lead screw 530; in addition, the second spring 542 has a reset function. When the fault is eliminated, the second spring 542 can reset the first mounting seat 400. Specifically, the second limiting structure 541 is a flange fixed to the peripheral wall of the nut sleeve 540 and protruding outward. This is a conventional structure and will not be described in detail here. Furthermore, in this embodiment, the first mounting base 400 is also provided with a corresponding third sensing device. Specifically, the third sensing device adopts a third proximity switch, which is used to detect the upward sliding of the first mounting base 400 relative to the nut sleeve 540 and can send a signal to the control system to stop the device and prevent damage.

[0051] It can be understood that in this embodiment, when the output shaft of the adjusting cylinder 600 is in an extended state, there is a certain distance between the auxiliary slide 200 and the first mounting seat 400. At this time, if the auxiliary slide 200 is subjected to an upward impact force, the first spring 412 plays a buffering role; and when the output shaft of the adjusting cylinder 600 is in a retracted state, the auxiliary slide 200 and the first mounting seat 400 are in contact with each other. At this time, if the auxiliary slide 200 is subjected to an upward impact force, it will be transmitted to the first mounting seat 400, and the second spring 542 will play a buffering role.

[0052] Reference Figure 2 and Figure 4 As shown, it can be understood that the peripheral wall of the third through-hole 402 is provided with a limiting groove 403 extending outward, and the upper and lower ends of the limiting groove 403 are open. A limiting block 543 is connected to the peripheral wall of the nut sleeve 540, and the limiting block 543 can be embedded in the limiting groove 403 by relative vertical sliding. The limiting groove 403 is used to cooperate with the limiting block 543 to limit the rotation of the nut sleeve 540 relative to the first mounting seat 400, so that it can be transmitted to the nut sleeve 540 through the trapezoidal screw rod 530 to drive the first mounting seat 400 to rise and fall.

[0053] In some specific embodiments, such as Figure 4As shown, a second abutment ring 544 is detachably provided on the nut sleeve 540 for abutting against the upper end of the second spring 542. A washer 545 is also movably provided on the nut sleeve 540. The washer 545 is located between the second spring 542 and the first mounting seat 400, and its upper and lower ends are respectively used to abut against the spring and the first mounting seat 400.

[0054] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. A tool-lifting device for a long-stroke broaching machine, mounted on a bed (100), wherein a main slide (110) capable of being raised and lowered is provided on the bed (100), characterized in that: include: An auxiliary slide plate (200), located on the upper side of the main slide plate (110), for clamping the top of the broach (300); A first mounting seat (400) is located on the upper side of the auxiliary slide (200) and is provided with a knife lifting cylinder (410), wherein the output end of the knife lifting cylinder (410) is connected to the auxiliary slide (200) for driving the auxiliary slide (200) to move up and down; A second mounting seat (500) is located on the upper side of the first mounting seat (400) and is provided with a tool adjustment mechanism (510) for driving the first mounting seat (400) to rise and fall, the tool adjustment mechanism (510) comprising a driving member (520), a trapezoidal screw rod (530) driven to rotate by the driving member (520), and a nut sleeve (540) threadedly engaged with the trapezoidal screw rod (530), the nut sleeve (540) being mounted on the first mounting seat (400); An adjusting oil cylinder (600) is provided on the main slide plate (110), and an output end of the adjusting oil cylinder (600) is connected to the second mounting seat (500) for driving the second mounting seat (500) to move up and down; The bed (100) is provided with a bed platform (140) between the main slide (110) and the auxiliary slide (200), and the bed platform (140) is used to place a workpiece, and a hole for the broach (300) to pass through is provided on the bed platform (140).

2. The long-stroke broaching machine tool feeding device according to claim 1, characterized in that: It also includes a vertically extending guide rail (120) provided on the bed (100), a slider (130) being slidably provided on the guide rail (120), and the auxiliary slide plate (200), the first mounting seat (400), and the second mounting seat (500) are all connected to the slider (130) so as to be slidably mounted on the guide rail (120).

3. The long-stroke broaching machine tool feeding device according to claim 1, characterized in that: The upper end of the auxiliary slide plate (200) is provided with a first buffer block (201) for abutting and buffering against the lower end of the first mounting seat (400), and the upper end of the first mounting seat (400) is provided with a second buffer block (401) for abutting and buffering against the lower end of the second mounting seat (500).

4. The long-stroke broaching machine tool feeding device according to claim 1, characterized in that: The output shaft of the adjustment oil cylinder (600) is fixedly connected to a connecting rod (610), a support seat (620) is provided on the top of the connecting rod (610), the second mounting seat (500) is provided with a first through-hole (501) and is sleeved on the connecting rod (610) through the first through-hole (501), and the bottom end of the second mounting seat (500) is supported against the upper surface of the support seat (620).

5. The tool lifting and feeding device for a long-stroke broaching machine according to claim 4, characterized in that: A first sensing device (550) is provided on the second mounting seat (500) for detecting the upward sliding of the second mounting seat (500) relative to the connecting rod (610).

6. The tool feeding device for a long-stroke broaching machine according to claim 1, characterized in that: The auxiliary slide plate (200) is provided with a second through hole (202) which passes through vertically, and the output shaft of the knife lifting cylinder (410) can be relatively vertically slidably passed through the second through hole (202). The output shaft of the knife lifting cylinder (410) is provided with a first limiting structure (411) on the lower side of the second through hole (202) for supporting and limiting the auxiliary slide plate (200), and a first spring (412) for applying a downward elastic force to the auxiliary slide plate (200) is provided on the upper side of the second through hole (202).

7. The tool feeding device for a long-stroke broaching machine according to claim 6, characterized in that: The output shaft of the knife lifting cylinder (410) is provided with a first abutment ring (413) on the upper side of the auxiliary slide plate (200), and the upper and lower ends of the first spring (412) respectively abut against the first abutment ring (413) and the auxiliary slide plate (200).

8. The tool lifting and feeding device for a long-stroke broaching machine according to claim 7, characterized in that: The first abutment ring (413) is sleeved on the output shaft of the knife lifting cylinder (410), and the output shaft of the knife lifting cylinder (410) has a step surface (414) for abutting against the upper surface of the first abutment ring (413) for limiting position.

9. The tool feeding device for a long-stroke broaching machine according to claim 6, characterized in that: The first mounting seat (400) is provided with a third through-hole (402) which passes through vertically, and the nut sleeve (540) can be slidably passed through the third through-hole (402) relatively vertically. The nut sleeve (540) is provided with a second limiting structure (541) on the lower side of the third through-hole (402) for supporting and limiting the first mounting seat (400), and a second spring (542) is provided on the upper side of the third through-hole (402) for applying a downward elastic force to the first mounting seat (400).

10. The tool lifting and feeding device for a long-stroke broaching machine according to claim 9, characterized in that: The peripheral wall of the third through hole (402) is provided with a limiting groove (403) extending outward, and the limiting groove (403) is open at both upper and lower ends. A limiting block (543) is connected to the peripheral wall of the nut sleeve (540), and the limiting block (543) can be embedded in the limiting groove (403) in a relatively vertical sliding manner. The limiting groove (403) is used to cooperate with the limiting block (543) to limit the rotation of the nut sleeve (540) relative to the first mounting seat (400).

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