Clearance eliminating mechanism for cutter grabbing body of vertical broaching machine

Abstract

The utility model relates to a gap eliminating mechanism for a cutter grabbing body of a vertical broaching machine, which belongs to the technical field of gap eliminating mechanisms for cutter grabbing bodies of vertical broaching machines and comprises a lower clamping seat, a cutter grabbing body is fixed on the top surface of the lower clamping seat, a broach is slidably connected in the cutter grabbing body, and a cutter grabbing mechanism is arranged on the cutter grabbing body. The cutter grabbing mechanism comprises a sleeve connected to the outer circumferential wall of the cutter grabbing body in a sliding mode, an upper protection cover is fixed to the bottom face of the sleeve, a lower protection cover is fixed to the outer circumferential wall of the cutter grabbing body, a spring is arranged on the outer circumferential wall of the cutter grabbing body in a sleeving mode, and two cutter ejecting pins are connected to the inner circumferential wall of the cutter grabbing body in a sliding mode. Two first positioning pins are fixed to the outer circumferential wall of the tool jacking pin, and four tool grabbing pins are connected to the inner circumferential wall of the tool grabbing body in a sliding mode. According to the gap eliminating mechanism for the cutter grabbing body of the vertical broaching machine, the circumferential direction and the axial direction of the broaching cutter are locked through the cutter grabbing mechanism, the gap between the broaching cutter and the cutter grabbing body is eliminated, and then cutter vibration caused by loosening during broaching of the broaching cutter can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of a vertical broaching machine gripper body backlash elimination mechanism, in particular to a vertical broaching machine gripper body backlash elimination mechanism. Background Art

[0002] Broaching is a metalworking method that uses a specially designed broach to cut a very thin layer of metal from the workpiece one tooth at a time to achieve higher dimensional accuracy and lower roughness. With the continuous upgrading of the manufacturing industry, higher requirements are also placed on the precision of broached workpieces. Some high-demand workpieces require heat treatment to increase hardness after a single broaching. However, heat treatment often causes a small amount of deformation, which requires a secondary broaching.

[0003] At present, the broaches in the existing technology lack an anti-backlash mechanism. When performing secondary broaching on the workpiece with increased hardness, the high-hardness workpiece will cause the broach to vibrate, resulting in vibration marks on the workpiece surface, affecting the dimensional accuracy of the workpiece, and causing certain inconveniences in use. Therefore, a vertical broaching machine gripper anti-backlash mechanism is proposed to solve the above problem. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a vertical broaching machine gripper body gap elimination mechanism, which has the advantages of eliminating the gap between the broach and the gripper body, avoiding the vibration of the tool to produce vibration marks that affect the precision of the workpiece, and solves the problem that the broaches in the existing technology lack a gap elimination mechanism and are prone to produce vibration marks that affect the precision of the workpiece.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a vertical broaching machine gripper body clearance elimination mechanism, comprising a lower clamping seat, a gripper body fixed to the top surface of the lower clamping seat, a broach slidably connected to the gripper body, and a gripper mechanism provided on the gripper body;

[0006] The knife grabbing mechanism includes a sleeve slidably connected to the peripheral wall of the knife grabbing body, an upper protective cover is fixed to the bottom surface of the sleeve, a lower protective cover is fixed to the outer peripheral wall of the knife grabbing body, a spring is mounted on the outer peripheral wall of the knife grabbing body, two top knife pins are slidably connected to the inner peripheral wall of the knife grabbing body, two first positioning pins are fixed on the outer peripheral wall of the top knife pins, four knife grabbing pins are slidably connected to the inner peripheral wall of the knife grabbing body, a second positioning pin is fixed on the outer peripheral wall of the knife grabbing pin, and a driving component for driving the sleeve to move up and down is provided on the lower clamping seat.

[0007] Furthermore, the drive assembly includes a mounting base fixed on the outer peripheral wall of the lower clamping base, a cylinder is fixed on the top surface of the mounting base, a clamping block is fixed on the top of the cylinder output shaft, a second connecting plate is fixed on the top surface of the clamping block, a floating joint is installed on the top surface of the second connecting plate, a first connecting plate is fixed on the outer peripheral wall of the sleeve, a clamping base is fixed on the top surface of the first connecting plate, and one end of the clamping block is inserted into the clamping base.

[0008] Furthermore, two linear bearings are fixed on the top surface of the mounting seat, and a guide shaft whose top end is fixed to the block is slidably connected inside the linear bearing. A protective shell is slidably connected to the outer peripheral wall of the grabber body, and a locking nut is threadedly connected to the outer peripheral wall of the grabber body. A positioning key is fixed on the top surface of the grabber body, and an adjustment washer is mounted on the outer peripheral wall of the grabber body.

[0009] Furthermore, water grooves are provided in the grab knife body and on both sides of the broach, and two water outlet holes are provided in the grab knife body and are respectively connected to the two water grooves.

[0010] Furthermore, the lower protective cover is slidably connected to the inner side of the upper protective cover, the spring is arranged between the upper protective cover and the lower protective cover, the bottom and top ends of the grabber body are both T-shaped step structures, and the adjustment washer is arranged at the bottom of the lower protective cover and abuts against the T-shaped table surface at the bottom of the grabber body.

[0011] Furthermore, the inner circumferential wall of the sleeve is provided with four upper groove inclined surfaces for horizontal sliding of four grabbing knife pins, the inner circumferential wall of the sleeve is provided with two lower groove inclined surfaces for horizontal sliding of two top knife pins, the grabbing knife body is provided with a plurality of sliding grooves for horizontal sliding of the first positioning pin and the second positioning pin respectively, and the outer circumferential wall of the broach is provided with four inclined grooves for abutment of the grabbing knife pins.

[0012] Furthermore, the sleeve is arranged at the bottom of the protective shell and is slidably connected to its inner wall. The inner top wall of the protective shell abuts against the T-shaped table at the top of the grabber body. The locking nut is arranged at the top of the protective shell. A positioning groove is provided on the outer peripheral wall of the broach.

[0013] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0014] 1. The vertical broaching machine's tool gripper body gap elimination mechanism, when in use, inserts the broach's handle into the tool gripper body from the top of the tool gripper body. The tool gripper body is provided with a tool gripper mechanism. The four tool gripper pins and two top tool pins provided in the tool gripper mechanism are used to lock the broach in the circumferential and axial directions, eliminating the gap between the broach and the tool gripper body. This can effectively avoid tool vibration caused by loosening during broaching, increase broaching accuracy, improve practicality, and be more convenient for promotion and use.

[0015] 2. The vertical broaching machine has a tool gripping body clearance elimination mechanism. The tool gripping and tool releasing operations of the tool gripping mechanism are driven by a cylinder provided in the driving assembly, which further improves the convenience of removing and installing the broach. After the broach is installed, the outer peripheral wall of the broach will be at the end of the water outlet. Through the cooperation of the water trough and the water outlet, the broaching fluid can be sprayed to flush the broach, further increasing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view schematic diagram of the utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the ejector pin of the utility model;

[0018] Figure 3 This is a schematic cross-sectional view of a tool grabbing pin of the present invention;

[0019] Figure 4 It is a cross-sectional schematic diagram of the water outlet of the utility model.

[0020] In the figure: 1 first connecting plate, 2 second connecting plate, 3 clamping block, 4 guide shaft, 5 linear bearing, 6 mounting seat, 7 lower clamping seat, 8 broach, 9 protective shell, 10 sleeve, 11 upper protective cover, 12 spring, 13 lower protective cover, 14 adjusting washer, 15 grabber body, 16 cylinder, 17 floating joint, 18 clamping seat, 19 first locating pin, 20 top knife pin, 21 locking nut, 22 locating key, 23 grabber pin, 24 second locating pin, 25 water trough, 26 water outlet. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figures 1 to 2 In this embodiment, a vertical broaching machine gripper body gap elimination mechanism includes a lower clamping seat 7, a gripper body 15 is fixed to the top surface of the lower clamping seat 7, and a broach 8 is slidably connected to the gripper body 15. The gripper body 15 is provided with a gripper mechanism. When in use, the handle of the broach 8 is inserted into the gripper body 15 from the top of the gripper body 15. The gripper body 15 is provided with a gripper mechanism. The gripper mechanism locks the broach 8 in the circumferential and axial directions to eliminate the gap between the broach 8 and the gripper body 15, thereby effectively avoiding the vibration of the broach 8 caused by loosening during broaching, increasing the broaching accuracy, better practicality, and more convenient for promotion and use.

[0023] It should be noted that the control method of this application is controlled by a controller, and the control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field, and this application is mainly used to protect mechanical devices, so this application will no longer explain the control method and circuit connection in detail.

[0024] See also Figures 2 to 3 The knife grabbing mechanism includes a sleeve 10 slidably connected to the outer peripheral wall of the knife grabbing body 15, an upper protective cover 11 is fixed to the bottom surface of the sleeve 10, a lower protective cover 13 is fixed to the outer peripheral wall of the knife grabbing body 15, a spring 12 is sleeved on the outer peripheral wall of the knife grabbing body 15, four knife grabbing pins 23 are slidably connected to the inner peripheral wall of the knife grabbing body 15, a second positioning pin 24 is fixed to the outer peripheral wall of the knife grabbing pin 23, a driving component for driving the sleeve 10 to move up and down is provided on the lower clamping seat 7, and the inner peripheral wall of the sleeve 10 is provided with a spring 12. There are four upper groove slopes on the wall for the four grabbing knife pins 23 to slide horizontally. When the broach 8 needs to be locked, the broach 8 is inserted into the top of the grabbing knife body 15, and then the sleeve 10 is driven by the driving component to move upward along the linear bearing 5. The spring 12 holds up the sleeve 10, and the upper groove slope inside the sleeve 10 drives the four grabbing knife pins 23 to move inward, clamping the broach 8 in the circumferential direction. Two top knife pins 20 are slidably connected to the inner peripheral wall of the grabbing knife body 15. The outer periphery of the top knife pin 20 is Two first positioning pins 19 are fixed on the wall, and two lower groove slopes are provided on the inner circumferential wall of the sleeve 10 for the horizontal sliding of the two top knife pins 20. A plurality of sliding grooves for the horizontal sliding of the first positioning pin 19 and the second positioning pin 24 are provided in the grabbing body 15. The lower groove slope inside the sleeve 10 drives the top knife pin 20 to move obliquely upward along the grabbing body 15, supporting the bottom plane of the broach 8, axially clamping the broach 8, completing the locking operation of the grabbing body 15, and pulling. Four inclined grooves are provided on the outer wall of the knife 8 for the knife-grabbing pins 23 to abut against. When the knife needs to be loosened, the cylinder 16 receives a knife-loosening signal, and the clamping block 3 installed at the upper end of the cylinder 16 drives the clamping seat 18, the first connecting plate 1 and the sleeve 10 to move downward to overcome the pressure of the spring 12, and the knife broaching 8 is lifted upward. The inclined grooves on the outer wall of the knife broaching 8 push the four knife-grabbing pins 23 to move outward, and the two knife-pushing pins 20 slide obliquely downward and retreat into the upper and lower grooves of the sleeve 10 respectively, completing the knife-loosening of the knife-grabbing body 15.

[0025] See also Figures 2 to 3A protective shell 9 is slidably connected to the outer peripheral wall of the grabbing body 15, a locking nut 21 is threadedly connected to the outer peripheral wall of the grabbing body 15, an adjusting washer 14 is sleeved on the outer peripheral wall of the grabbing body 15, the lower protective cover 13 is slidably connected to the inner side of the upper protective cover 11, and the spring 12 is arranged between the upper protective cover 11 and the lower protective cover 13. The bottom and top ends of the grabbing body 15 are both T-shaped step-shaped structures, the adjusting washer 14 is arranged at the bottom of the lower protective cover 13 and abuts against the T-shaped table at the bottom of the grabbing body 15, and the sleeve 10 is arranged at the bottom of the protective shell 9 and abuts against it. The inner wall is slidably connected, and the inner top wall of the protective shell 9 abuts against the T-shaped table at the top of the grabber body 15. The locking nut 21 is set on the top of the protective shell 9. When assembling the grabber body 15, the grabber body 15 is fixed on the lower base 7 of the broaching machine. The grabber body 15 is sequentially installed with the adjusting washer 14, the lower protective cover 13, the spring 12, the upper protective cover 11, the top knife pin 20, and the first positioning pin 19 from bottom to top, and then the grabber pin 23 and the second positioning pin 24 are installed. Then the sleeve 10 and the protective shell 9 are installed, and then tightened with the locking nut 21 to complete the assembly of the device.

[0026] See also Figures 2 to 3 In this embodiment, the drive assembly includes a mounting base 6 fixed on the outer peripheral wall of the lower card base 7, a cylinder 16 is fixed on the top surface of the mounting base 6, a block 3 is fixed on the top of the output shaft of the cylinder 16, two linear bearings 5 ​​are fixed on the top surface of the mounting base 6, a guide shaft 4 whose top end is fixed to the block 3 is slidably connected in the linear bearing 5, a second connecting plate 2 is fixed on the top surface of the block 3, a floating joint 17 is installed on the top surface of the second connecting plate 2, and a first connecting plate 1 is fixed on the outer peripheral wall of the sleeve 10. A card seat 18 is fixed on the top surface of the first connecting plate 1, and one end of the card block 3 is inserted into the card seat 18. When the knife locking operation is required, the control cylinder 16 is extended, and the cylinder 16 drives the card block 3 installed on the upper end of the cylinder 16 to rise together, further driving the card seat 18, the first connecting plate 1 and the sleeve 10 to move upward along the linear bearing 5, and then push the knife grabbing pin 23 and the top knife pin 20 to lock the broach 8. When the knife needs to be loosened, the control cylinder 16 is contracted to drive the sleeve 10 to move downward.

[0027] A positioning key 22 is fixed on the top surface of the grabber body 15, and a positioning groove is provided on the outer peripheral wall of the broach 8. A positioning key 22 is installed on the upper end of the grabber body 15 for cooperating with the positioning groove to position the broach 8 in the circumferential direction.

[0028] See also Figure 4 In this embodiment, water grooves 25 are provided in the tool grabber body 15 and on both sides of the broach 8. Two water outlets 26 are provided in the tool grabber body 15 and are respectively connected to the two water grooves 25. When the broaching machine starts to feed the tool downward, cutting fluid is sprayed through the water grooves 25 and the water outlets 26 in the tool grabber body 15 to flush the chips inside the tool grabber body 15.

[0029] The working principle of the above embodiment is:

[0030] The grabber body 15 is fixed on the lower base 7 of the broaching machine. The grabber body 15 is sequentially loaded with the adjusting washer 14, the lower protective cover 13, the spring 12, the upper protective cover 11, the top knife pin 20, the first positioning pin 19 from bottom to top, and then the grabber pin 23, the second positioning pin 24 are loaded, and then the sleeve 10 and the protective shell 9 are installed, and then fastened with the locking nut 21. The upper end of the grabber body 15 is equipped with a positioning key 22 for positioning the broach 8 in the circumferential direction. When the broach 8 enters the grabber body 15, the cylinder 16 drives the block 3 installed on the upper end of the cylinder 16 to rise together, and further drives the card seat 18, the first connecting plate 1 and the sleeve 10 to move upward along the linear bearing 5. The spring 12 holds up the sleeve 10, and the upper layer inside the sleeve 10 The groove bevel drives the four knife-grabbing pins 23 to move inward, clamping the broach 8 in the circumferential direction, and then the lower groove bevel inside the sleeve 10 drives the top knife pin 20 to move obliquely upward along the knife-grabbing body 15, supporting the bottom plane of the broach 8, axially clamping the broach 8, and completing the knife locking operation of the knife-grabbing body 15. When the knife needs to be loosened, the cylinder 16 receives a knife-loosening signal, and the block 3 installed at the upper end of the cylinder 16 drives the clamping seat 18, the first connecting plate 1 and the sleeve 10 to overcome the pressure of the spring 12 and move downward, and the broach 8 is lifted upward. The bevel groove on the outer peripheral wall of the broach 8 pushes the four knife-grabbing pins 23 to move outward, and the two top knife pins 20 slide obliquely downward and retreat to the upper and lower grooves of the sleeve 10 respectively, completing the knife loosening of the knife-grabbing body 15.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vertical broaching machine tool gripper backlash elimination mechanism, comprising a lower clamping seat (7), characterized in that: A grabbing body (15) is fixed on the top surface of the lower clamping seat (7), a broach (8) is slidably connected in the grabbing body (15), and a grabbing mechanism is provided on the grabbing body (15); The grabbing mechanism comprises a sleeve (10) slidably connected to the outer peripheral wall of the grabbing body (15); an upper protective cover (11) is fixed to the bottom surface of the sleeve (10); a lower protective cover (13) is fixed to the outer peripheral wall of the grabbing body (15); a spring (12) is sleeved on the outer peripheral wall of the grabbing body (15); two top knife pins (20) are slidably connected to the inner peripheral wall of the grabbing body (15); two first positioning pins (19) are fixed to the outer peripheral wall of the top knife pins (20); four grabbing pins (23) are slidably connected to the inner peripheral wall of the grabbing body (15); a second positioning pin (24) is fixed to the outer peripheral wall of the grabbing pins (23); and a driving component for driving the sleeve (10) to move up and down is provided on the lower clamping seat (7).

2. A backlash eliminating mechanism for a tool gripper of a vertical broaching machine according to claim 1, characterized in that: The driving assembly includes a mounting seat (6) fixed on the outer peripheral wall of the lower clamping seat (7), a cylinder (16) is fixed on the top surface of the mounting seat (6), a clamping block (3) is fixed on the top of the output shaft of the cylinder (16), a second connecting plate (2) is fixed on the top surface of the clamping block (3), a floating joint (17) is installed on the top surface of the second connecting plate (2), a first connecting plate (1) is fixed on the outer peripheral wall of the sleeve (10), a clamping seat (18) is fixed on the top surface of the first connecting plate (1), and one end of the clamping block (3) is inserted into the clamping seat (18).

3. The backlash eliminating mechanism for the tool gripper of a vertical broaching machine according to claim 2, characterized in that: Two linear bearings (5) are fixed on the top surface of the mounting seat (6), a guide shaft (4) whose top end is fixed to the clamping block (3) is slidably connected inside the linear bearing (5), a protective shell (9) is slidably connected to the outer peripheral wall of the grabbing body (15), a locking nut (21) is threadedly connected to the outer peripheral wall of the grabbing body (15), a positioning key (22) is fixed on the top surface of the grabbing body (15), and an adjusting washer (14) is mounted on the outer peripheral wall of the grabbing body (15).

4. The backlash eliminating mechanism for the tool gripper of a vertical broaching machine according to claim 1, characterized in that: Water grooves (25) are provided in the grabbing knife body (15) and on both sides of the broach (8), and two water outlet holes (26) are provided in the grabbing knife body (15) and are respectively connected to the two water grooves (25).

5. The backlash eliminating mechanism for the tool gripper of a vertical broaching machine according to claim 3, characterized in that: The lower protective cover (13) is slidably connected to the inner side of the upper protective cover (11), the spring (12) is arranged between the upper protective cover (11) and the lower protective cover (13), the bottom end and the top end of the grabber body (15) are both T-shaped step-like structures, and the adjustment washer (14) is arranged at the bottom of the lower protective cover (13) and abuts against the T-shaped table at the bottom of the grabber body (15).

6. The backlash eliminating mechanism for the tool gripper of a vertical broaching machine according to claim 1, characterized in that: The inner peripheral wall of the sleeve (10) is provided with four upper groove inclined surfaces for horizontal sliding of four grabbing knife pins (23), the inner peripheral wall of the sleeve (10) is provided with two lower groove inclined surfaces for horizontal sliding of two top knife pins (20), the grabbing knife body (15) is provided with a plurality of sliding grooves for horizontal sliding of the first positioning pin (19) and the second positioning pin (24), and the outer peripheral wall of the broach (8) is provided with four inclined grooves for abutment of the grabbing knife pins (23).

7. The backlash eliminating mechanism for the tool gripper of a vertical broaching machine according to claim 5, characterized in that: The sleeve (10) is arranged at the bottom of the protective shell (9) and is slidably connected to the inner wall thereof. The inner top wall of the protective shell (9) abuts against the T-shaped table at the top of the grabber body (15). The locking nut (21) is arranged at the top of the protective shell (9). A positioning groove is provided on the outer peripheral wall of the broach (8).

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