Milling device for cross slot of universal joint shaft

Abstract

The present invention relates to the technical field of cross slot milling, specifically a milling device for the cross slot of a universal joint shaft, comprising a chassis; a lifting platform and a base are installed on the chassis; a hydraulic cylinder is rotatably installed on the rotating base; a clamping block is fixedly installed on the hydraulic cylinder; a tool holder is provided on the chassis; a positioning structure is provided on the chassis, and the positioning structure can drive the tool holder to approach or move away from the lifting platform, so as to drive the milling cutter to approach the workpiece to be processed; a traveling structure is provided on the chassis; the traveling structure can drive the tool holder to move back and forth, so as to drive the high-speed rotating milling cutter to move according to a set trajectory; a flipping structure is provided on the chassis, and the flipping structure can drive the rotating base to rotate 90°, and can drive the hydraulic cylinder to flip 180°, thereby driving the clamping block to flip synchronously, thereby flipping the workpiece; the flipping structure can reduce the offset distance between the intersection center of the longitudinal straight groove and the transverse straight groove and the central axis of the workpiece, thereby improving the working efficiency of the universal joint shaft, and can effectively improve the processing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of cross slot milling, in particular to a milling device for the cross slot of a universal joint shaft. Background Art

[0002] Universal joints are devices used to transmit power while allowing for a certain angular misalignment between two shafts. They are commonly found in automotive transmission systems, construction machinery, and robotic joints. The cross groove on a universal joint refers to a cross-shaped groove machined into a connecting shaft (such as a flange fork or cross shaft). (A cylindrical metal part has longitudinal and transverse grooves milled into its two end faces, perpendicular to each other.)

[0003] In the machining of cross slots in universal joint shafts, the center deviation between the horizontal and vertical slots (i.e., the intersection of the cross slot deviates from the designed center position) can directly affect its function, lifespan, and reliability. This can lead to reduced transmission efficiency, localized stress concentration (deviation leads to uneven contact between the cross shaft and the slot, concentrating contact stress in a specific area and accelerating wear), and increased frictional resistance (asymmetric force can cause vibration and increase energy loss, especially at high speeds). Cross slots are typically machined using a milling device.

[0004] The milling device consists of a clamping structure, a positioning crane, and a milling mechanism. During milling, the clamping structure secures the cylindrical metal column to the milling device, while the positioning crane positions the milling mechanism and controls the milling stroke. The milling mechanism is equipped with a milling cutter and drives it to rotate at high speed. The clamping structure, positioning crane, and milling mechanism work together to complete the cross slot machining.

[0005] Since the two perpendicular straight grooves of the cross slot are respectively arranged on the two end faces of the metal column, when using a common milling device for processing, only the straight groove on one face can be processed first. After the processing is completed, the metal column is flipped 180° and rotated 90°, and then fixed to the milling device through a clamping structure to process the straight groove on the other end face. After the metal column is flipped and rotated, it needs to be repositioned to ensure that the intersection between the two straight grooves is located at the center of the metal column. The position of the metal column deviates greatly during the flipping and rotation process, making positioning more difficult and easily causing the intersection of the cross slot to deviate from the designed center position, resulting in poor processing quality and reduced efficiency in processing the cross slot. Summary of the Invention

[0006] The object of the present invention is to provide a milling device for the cross groove of a universal joint shaft to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A milling device for a cross slot of a universal joint shaft, comprising a chassis;

[0009] The chassis is provided with a lifting platform slidably mounted thereon and a rotating base rotatably mounted thereon; two sets of symmetrically arranged hydraulic cylinders are rotatably mounted on the rotating base; a clamping block is fixedly mounted on the output end of the hydraulic cylinder;

[0010] The chassis is provided with a cutter seat for mounting a milling cutter; and the cutter seat can drive the milling cutter to rotate at high speed;

[0011] The chassis is provided with a positioning structure, which can drive the tool holder to move closer to or away from the lifting platform, so as to drive the milling cutter closer to the workpiece to be processed;

[0012] The chassis is provided with a traveling structure; the traveling structure can drive the tool holder to move back and forth, so as to drive the high-speed rotating milling cutter to move along a set trajectory;

[0013] The chassis is provided with a flip structure, which can drive the rotating base to rotate 90 degrees and drive the hydraulic cylinder to flip 180 degrees, thereby driving the clamping block to flip synchronously, thereby flipping the workpiece.

[0014] As a further solution of the present invention: the positioning structure includes multiple groups of columns fixedly mounted on the chassis; a transverse guide rail is provided on the chassis; a sliding sleeve is fixedly mounted on the transverse guide rail and slidably engaged with the column; a transverse screw column is rotatably mounted on the transverse guide rail; a transverse slider is slidably engaged on the transverse guide rail; a transverse threaded sleeve is fixedly mounted on the transverse slider and threadedly connected to the transverse screw column; the tool holder is connected to the transverse slider through a crane structure.

[0015] As a further solution of the present invention: the positioning structure also includes a vertical screw column rotatably mounted on the chassis; a vertical threaded sleeve threadedly connected to the vertical screw column is fixedly mounted on the transverse guide rail.

[0016] As a further solution of the present invention: the traveling structure includes a longitudinal guide rail fixedly mounted on the transverse slider; a longitudinal slider is slidably engaged on the longitudinal guide rail; the tool holder is fixedly connected to the longitudinal slider; a longitudinal screw column is rotatably mounted on the transverse slider; a longitudinal threaded sleeve is fixedly mounted on the longitudinal slider and is threadedly connected to the longitudinal screw column.

[0017] As a further solution of the present invention: the flip structure includes a worm rotatably mounted on the chassis; a worm wheel meshing with the worm is fixedly mounted on the rotating base.

[0018] As a further solution of the present invention: the flip structure further includes a first bevel gear fixedly connected to the hydraulic cylinder; and a second bevel gear meshing with the first bevel gear is fixedly mounted on the chassis.

[0019] As a further solution of the present invention: a driving motor is fixedly mounted on the chassis, a fixed turntable is fixedly mounted on the output end of the driving motor; a plurality of groups of first gear blocks are fixedly mounted on the fixed turntable; a sliding turntable is slidably engaged with the worm; a plurality of groups of second gear blocks that can engage with the first gear blocks are fixedly mounted on the sliding turntable; a first spring is sleeved on the worm; and both ends of the first spring respectively contact the sliding turntable and the worm.

[0020] As a further solution of the present invention: a telescopic column is fixedly installed on the transverse guide rail; a telescopic sleeve is fixedly installed on the chassis and is slidably engaged with the telescopic column; a connecting rod is rotatably installed on the sliding turntable; a wedge block is fixedly installed on the connecting rod and is slidably engaged with the telescopic sleeve; an interference block is slidably engaged in contact with the wedge block in the telescopic sleeve; a second spring is provided in the telescopic sleeve; and both ends of the second spring respectively contact the telescopic column and the interference block.

[0021] As a further solution of the present invention: an annular baffle is fixedly mounted on the rotating base.

[0022] As a further solution of the present invention: symmetrically arranged doors are slidably engaged on the chassis.

[0023] Compared with the prior art, the beneficial effects of the present invention are: the flipping structure can reduce the offset distance between the intersection center of the longitudinal straight groove and the transverse straight groove and the central axis of the workpiece, thereby improving the working efficiency of the universal joint shaft; and the flipping structure can avoid multiple executions of clamping, releasing, positioning, resetting and workpiece center positioning during the processing of a workpiece; thereby reducing the programming amount of the control system and greatly avoiding the probability of conflicts between the programming of various functions, thereby improving the practicality of the device and reducing the subsequent maintenance frequency; and can effectively improve processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a structural schematic diagram of an embodiment of a milling device for a cross groove of a universal joint shaft.

[0025] Figure 2 This is a structural schematic diagram of a lifting platform in one embodiment of a milling device for a cross slot of a universal joint shaft.

[0026] Figure 3 for Figure 2 Schematic diagram of the structure at point A.

[0027] Figure 4 This is a schematic structural diagram of a column in an embodiment of a milling device for a cross groove of a universal joint shaft.

[0028] Figure 5 for Figure 4 A structural diagram from another perspective.

[0029] Figure 6 This is a schematic structural diagram of a transverse guide rail in an embodiment of a milling device for a cross groove of a universal joint shaft.

[0030] Figure 7 This is a schematic structural diagram of a clamping block in one embodiment of a milling device for a cross slot of a universal joint shaft.

[0031] Figure 8 This is a schematic structural diagram of a worm wheel and a worm in one embodiment of a milling device for a cross groove of a universal joint shaft.

[0032] Figure 9 for Figure 8 Schematic diagram of the structure at point B.

[0033] Figure 10 This is a schematic structural diagram of a fixed turntable and a sliding turntable in one embodiment of a milling device for a cross groove of a universal joint shaft.

[0034] In the figure: 1, chassis; 101, door; 102, column;

[0035] 2. Lifting platform;

[0036] 3. Rotating base; 301. Annular baffle; 302. Worm gear;

[0037] 4. Hydraulic cylinder; 401. First bevel gear;

[0038] 5. Clamping block;

[0039] 6. Second bevel gear;

[0040] 7. Drive motor;

[0041] 8. Fixed turntable; 801. First gear block;

[0042] 9. Sliding turntable; 901. Second gear block;

[0043] 10. First spring;

[0044] 11. Connecting rod; 1101. Wedge;

[0045] 12. Worm;

[0046] 13. Horizontal guide rail; 1301. Vertical threaded sleeve; 1302. Sliding sleeve;

[0047] 14. Vertical screw column;

[0048] 15. Horizontal slider; 1501. Horizontal threaded sleeve;

[0049] 16. Horizontal screw column;

[0050] 17. Longitudinal guide rail;

[0051] 18. Longitudinal slider; 1801. Longitudinal threaded sleeve;

[0052] 19. Longitudinal screw column;

[0053] 20. Knife holder;

[0054] 21. Telescopic column;

[0055] 22. Telescopic sleeve;

[0056] 23. Second spring;

[0057] 24. Conflict block. DETAILED DESCRIPTION

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0059] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiment.

[0060] See also Figures 1 to 10 ,In an embodiment of the present invention, a milling device for a cross slot of a universal joint shaft comprises a chassis 1;

[0061] The chassis 1 is provided with a lifting platform 2 which is slidably mounted and a rotating base 3 which is rotatably mounted; two sets of symmetrically arranged hydraulic cylinders 4 are rotatably mounted on the rotating base 3; a clamping block 5 is fixedly mounted on the output end of the hydraulic cylinder 4;

[0062] The chassis 1 is provided with a cutter seat 20 for mounting a milling cutter; and the cutter seat 20 can drive the milling cutter to rotate at high speed;

[0063] The chassis 1 is provided with a positioning structure, which can drive the tool holder 20 to move closer to or away from the lifting platform 2, so as to drive the milling cutter closer to the workpiece to be processed;

[0064] The chassis 1 is provided with a traveling structure; the traveling structure can drive the tool holder 20 to move back and forth, so as to drive the high-speed rotating milling cutter to move along a set trajectory;

[0065] The chassis 1 is provided with a flip structure, which can drive the rotating base 3 to rotate 90 degrees and drive the hydraulic cylinder 4 to flip 180 degrees, thereby driving the clamping block 5 to flip synchronously, thereby flipping the workpiece.

[0066] Taking an embodiment combining all the features described in this application as an example, when in use, the workpiece to be processed is placed on the lifting platform 2; the lifting platform 2 can rise or fall in the chassis 1, and the rising or falling distance can be controlled by the control system, and the movement stroke of the lifting platform 2 is adjusted according to the length of the workpiece.

[0067] The two hydraulic cylinders 4 work synchronously through the control system to drive the two clamping blocks 5 to move closer or farther away, thereby clamping the workpiece on the lifting platform 2; the control system controls the rising or falling distance of the lifting platform 2 so that the clamping blocks 5 can clamp the middle part of the workpiece, thereby avoiding the tool collision during milling, thereby avoiding damage to the device; and the lifting platform 2 will descend in the chassis 1 after the clamping blocks 5 clamp the workpiece, thereby separating from the workpiece, thereby avoiding the lifting platform 2 hindering the flipping of the workpiece during subsequent milling.

[0068] A milling cutter is reasonably selected according to the workpiece and processing requirements, and is fixedly mounted on the cutter holder 20; the cutter holder 20 can drive the milling cutter to rotate at high speed, thereby meeting the milling requirements.

[0069] The positioning structure is controlled by a control system to drive the tool holder 20 to move horizontally and vertically in the lateral direction of the chassis 1, thereby driving the tool holder 20 to reach the optimal initial processing position, thereby reducing the difficulty and loss of the milling cutter during milling.

[0070] The control system controls the movement of the crane structure and the trajectory of the movement, thereby driving the tool holder 20 to move horizontally in the longitudinal direction of the chassis 1, thereby milling a longitudinal straight groove on one side end face of the workpiece.

[0071] Afterwards, the control system controls the positioning structure to move, thereby driving the tool holder 20 away from the workpiece to facilitate the flipping structure movement and avoid tool collision.

[0072] The rotating base 3 is driven to rotate 90° through the flipping structure action, and during the rotation of the rotating base 3, the hydraulic cylinder 4 will rotate 180°, thereby flipping the workpiece so that the longitudinal straight groove is flipped to the lower end, and the unprocessed side end face is flipped to the upper end, and the workpiece will be driven to rotate at a right angle, so that during subsequent processing, a transverse straight groove perpendicular to the longitudinal straight groove can be processed on the unprocessed side end face.

[0073] After the flipping structure moves, the positioning structure and the crane structure are controlled by the control system to process the transverse straight groove of the workpiece.

[0074] The flipping structure can reduce the offset distance between the intersection center of the longitudinal straight groove and the transverse straight groove and the central axis of the workpiece, thereby improving the working efficiency of the universal joint shaft; and the flipping structure can avoid multiple executions of clamping, releasing, positioning, resetting and workpiece center positioning during the processing of a workpiece; thereby reducing the programming amount of the control system and greatly avoiding the probability of conflicts between the programming of various functions, thereby improving the practicality of the device and reducing the subsequent maintenance frequency.

[0075] In another embodiment of the present invention, the positioning structure includes multiple groups of columns 102 fixedly mounted on the chassis 1; a transverse guide rail 13 is provided on the chassis 1; a sliding sleeve 1302 is fixedly mounted on the transverse guide rail 13 and is slidably engaged with the column 102; a transverse screw column 16 is rotatably mounted on the transverse guide rail 13; a transverse slider 15 is slidably engaged with the transverse guide rail 13; a transverse threaded sleeve 1501 is fixedly mounted on the transverse slider 15 and is threadedly connected to the transverse screw column 16; the tool holder 20 is connected to the transverse slider 15 through a crane structure.

[0076] In another embodiment of the present invention, the positioning structure further comprises a vertical screw column 14 rotatably mounted on the chassis 1 ; a vertical threaded sleeve 1301 threadedly connected to the vertical screw column 14 is fixedly mounted on the transverse guide rail 13 .

[0077] Taking the embodiment combining all the features described in this application as an example, when in use, the transverse screw column 16 is connected to the transverse drive device on the guide rail; the transverse drive device is controlled by the control system to drive the transverse screw column 16 to rotate.

[0078] When the transverse screw column 16 rotates, the threaded engagement drives the transverse threaded sleeve 1501 to move horizontally along the length of the transverse screw column 16, thereby driving the transverse slider 15 to move synchronously, thereby driving the tool holder 20 to move synchronously via the crane structure; and the travel of movement is controlled according to the actual conditions of the workpiece and the milling requirements. When the transverse screw column 16 stops rotating, the threaded engagement fixes the position of the transverse threaded sleeve 1501, thereby fixing the position of the transverse slider 15. This prevents the high-speed rotating milling cutter and the workpiece from causing the tool holder 20 to shift during milling, thereby reducing the processing quality and even damaging the device.

[0079] The vertical screw column 14 is connected to the vertical driving device, and the vertical driving device is controlled by the control system to drive the vertical screw column 14 to rotate.

[0080] The rotating vertical screw column 14 can drive the vertical threaded sleeve 1301 to move along the length direction of the vertical screw column 14 through threaded cooperation, thereby driving the transverse guide rail 13 to move synchronously, thereby driving the tool holder 20 to move closer to or away from the lifting platform 2 through the crane structure; the control system adjusts the moving stroke of the transverse guide rail 13 according to the actual situation of the workpiece and the milling requirements, thereby improving the processing quality.

[0081] When the vertical screw column 14 stops rotating, the position of the vertical threaded sleeve 1301 is fixed through threaded engagement, thereby fixing the vertical height of the tool holder 20 and the lifting platform 2, thereby avoiding the extrusion force between the high-speed rotating milling cutter and the workpiece during the milling process causing the position of the tool holder 20 to shift, thereby improving the processing quality and protecting the device from damage.

[0082] In another embodiment of the present invention, the crane structure includes a longitudinal guide rail 17 fixedly mounted on the transverse slider 15; a longitudinal slider 18 is slidably engaged on the longitudinal guide rail 17; the tool holder 20 is fixedly connected to the longitudinal slider 18; a longitudinal screw column 19 is rotatably mounted on the transverse slider 15; a longitudinal threaded sleeve 1801 threadedly connected to the longitudinal screw column 19 is fixedly mounted on the longitudinal slider 18.

[0083] Taking the embodiment combining all the features described in this application as an example, when in use, a longitudinal drive device connected to the longitudinal screw column 19 is fixedly installed on the transverse slider 15; the longitudinal drive device is controlled by the control system to drive the longitudinal screw column 19 to rotate.

[0084] The rotating longitudinal screw column 19 can drive the longitudinal threaded sleeve 1801 to move along the length direction of the longitudinal screw column 19 through threaded engagement, thereby driving the longitudinal slider 18 to move on the longitudinal guide rail 17, thereby driving the tool holder 20 to move synchronously.

[0085] The control system controls the movement trajectory of the tool holder 20 according to the actual situation of the workpiece and the milling requirements, thereby controlling the movement trajectory of the milling cutter on the end face of the workpiece. Through reasonable design, the processing quality can be improved.

[0086] By threading the longitudinal screw column 19 and the longitudinal threaded sleeve 1801 together, and controlling the rotational speed of the longitudinal screw column 19 through a control system, the movement speed of the tool holder 20 is controlled, thereby controlling the milling speed of the milling cutter, effectively improving milling quality and reducing milling cutter wear. Furthermore, the threaded engagement can offset the extrusion force between the high-speed rotating milling cutter and the workpiece, thereby improving milling quality.

[0087] In another embodiment of the present invention, the flip structure includes a worm 12 rotatably mounted on the chassis 1 ; a worm wheel 302 meshing with the worm 12 is fixedly mounted on the rotating base 3 .

[0088] Taking the embodiment combining all the features described in this application as an example, when in use, after the longitudinal straight groove of the end face of the workpiece close to the milling cutter is milled, the positioning structure and the crane structure cooperate with each other to make the milling cutter move away from the workpiece, thereby avoiding the phenomenon of tool collision.

[0089] Then, the control system controls the rotation of the worm 12, which drives the worm wheel 302 to rotate through meshing action, thereby driving the rotating base 3 to rotate, thereby driving the two groups of hydraulic cylinders 4 and the clamping block 5 to rotate synchronously; and during the rotation process, the clamping block 5 maintains the clamping of the workpiece, thereby avoiding dislocation of the workpiece.

[0090] By controlling the meshing between the worm 12 and the worm wheel 302 through the control system, the rotation angle of the rotating base 3 can be accurately controlled to achieve a 90° rotation, so that the subsequently processed transverse straight groove and the longitudinal straight groove remain perpendicular, thereby improving the working efficiency of the universal joint shaft.

[0091] In another embodiment of the present invention, the flip structure further includes a first bevel gear 401 fixedly connected to the hydraulic cylinder 4 ; and a second bevel gear 6 meshing with the first bevel gear 401 is fixedly mounted on the chassis 1 .

[0092] Taking the embodiment combining all the features described in this application as an example, when in use, when the rotating base 3 rotates, it will drive the hydraulic cylinder 4 to rotate synchronously, thereby driving the first bevel gear 401 to rotate synchronously along the central axis of the rotating base 3.

[0093] When the first bevel gear 401 rotates synchronously with the rotating base 3 , the first bevel gear 401 and the second bevel gear 6 engage with each other, thereby driving the first bevel gear 401 to rotate along the central axis of the hydraulic cylinder 4 .

[0094] By controlling the meshing of the first bevel gear 401 and the second bevel gear 6 , the first bevel gear 401 can be rotated 180° when the rotating base 3 is rotated 90°, thereby realizing the flipping of the workpiece.

[0095] The flipping structure can reduce the offset distance between the intersection center of the longitudinal straight groove and the transverse straight groove and the central axis of the workpiece, thereby improving the working efficiency of the universal joint shaft; and the flipping structure can avoid multiple executions of clamping, releasing, positioning, resetting and workpiece center positioning during the processing of a workpiece; thereby reducing the programming amount of the control system and greatly avoiding the probability of conflicts between the programming of various functions, thereby improving the practicality of the device and reducing the subsequent maintenance frequency.

[0096] In another embodiment of the present invention, a drive motor 7 is fixedly mounted on the chassis 1, and a fixed turntable 8 is fixedly mounted on the output end of the drive motor 7; a plurality of groups of first tooth blocks 801 are fixedly mounted on the fixed turntable 8; a sliding turntable 9 is slidably engaged with the worm 12; a plurality of groups of second tooth blocks 901 that can engage with the first tooth blocks 801 are fixedly mounted on the sliding turntable 9; a first spring 10 is sleeved on the worm 12; and the two ends of the first spring 10 respectively contact the sliding turntable 9 and the worm 12.

[0097] In another embodiment of the present invention, a telescopic column 21 is fixedly installed on the transverse guide rail 13; a telescopic sleeve 22 that slides and engages with the telescopic column 21 is fixedly installed on the chassis 1; a connecting rod 11 is rotatably installed on the sliding turntable 9; a wedge block 1101 that slides and engages with the telescopic sleeve 22 is fixedly installed on the connecting rod 11; a resistance block 24 that slides and engages with the wedge block 1101 is slidably engaged in the telescopic sleeve 22; a second spring 23 is provided in the telescopic sleeve 22; and both ends of the second spring 23 respectively interfere with the telescopic column 21 and the resistance block 24.

[0098] Taking the embodiment combining all the features described in this application as an example, when in use, the driving motor 7 is activated to drive the fixed turntable 8 to rotate.

[0099] In the initial state, multiple groups of first tooth blocks 801 and multiple groups of second tooth blocks 901 engage with each other. Therefore, when the fixed turntable 8 rotates, the engagement between the first tooth blocks 801 and the second tooth blocks 901 can drive the sliding turntable 9 to rotate, thereby driving the worm 12 to rotate, thereby driving the flipping structure to move and realize the flipping of the workpiece.

[0100] When the positioning structure drives the transverse guide rail 13 close to the workpiece, it will drive the telescopic column 21 to move inward in the telescopic sleeve 22, thereby compressing the second spring 23. As the compression amount of the second spring 23 gradually increases, its elastic force also gradually increases, causing the extrusion force between the resistance block 24 and the wedge block 1101 to become greater and greater.

[0101] The elastic force of the first spring 10 acts on the sliding turntable 9 , thereby acting on the wedge block 1101 through the connecting rod 11 .

[0102] When the elastic force of the second spring 23 is greater than the elastic force of the first spring 10 , the resistance block 24 will squeeze the wedge block 1101 , causing it to slide in the telescopic sleeve 22 , thereby driving the sliding turntable 9 away from the fixed turntable 8 through the connecting rod 11 and continuing to compress the first spring 10 .

[0103] When the first gear block 801 is separated from the second gear block 901 , the fixed turntable 8 cannot rotate to drive the sliding turntable 9 , and thus cannot drive the worm 12 to rotate, so that the position of the workpiece remains fixed.

[0104] When the longitudinal straight groove is milled on one end face of the workpiece, the positioning structure drives the transverse guide rail 13 away from the workpiece, thereby driving the milling cutter away from the workpiece to facilitate the turning of the workpiece and avoid collision with the cutter.

[0105] During this process, the telescopic column 21 will move outward in the telescopic sleeve 22, thereby reducing the compression of the second spring 23 and reducing the elastic force of the second spring 23 until the telescopic column 21 moves outward a certain distance and the elastic force of the second spring 23 is zero; at this time, the elastic force of the first spring 10 will drive the sliding turntable 9 to approach the fixed turntable 8, so that the first tooth block 801 and the second tooth block 901 re-engage; at the same time, the connecting rod 11 drives the wedge block 1101 to slide, so that the interference block 24 is reset.

[0106] The height of the transverse guide rail 13 is used to control the matching state between the fixed turntable 8 and the sliding turntable 9, so as to ensure that the flipping structure will not move accidentally when the vertical distance between the milling cutter and the workpiece is small, thereby reducing the probability of tool collision.

[0107] In another embodiment of the present invention, an annular baffle 301 is fixedly mounted on the rotating base 3 .

[0108] Taking the embodiment combining all the features described in this application as an example, when in use, the annular baffle 301 blocks the waste produced during the milling process to prevent the waste from splashing and contaminating the device, thereby increasing the service life of the device and reducing cleaning work.

[0109] In another embodiment of the present invention, a symmetrically arranged door 101 is slidably engaged with the chassis 1 .

[0110] Taking the embodiment combining all the features described in this application as an example, when in use, during the milling process, the high-speed rotating milling cutter contacts the workpiece, causing the workpiece to have a large kinetic potential energy, which is offset by the clamping of the clamping block 5; when the clamping block 5 is not clamped firmly, the workpiece with large kinetic energy may fly out of the chassis 1, posing a greater potential danger; and during processing, by closing the hatch 101, the operator can be effectively prevented from being injured.

[0111] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0112] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A milling device for a cross groove of a universal joint shaft, comprising a chassis (1); It is characterized by: The chassis (1) is provided with a lifting platform (2) which is slidably mounted and a rotating base (3) which is rotatably mounted; two groups of symmetrically arranged hydraulic cylinders (4) are rotatably mounted on the rotating base (3); a clamping block (5) is fixedly mounted on the output end of the hydraulic cylinder (4); The chassis (1) is provided with a cutter seat (20) for mounting a milling cutter; and the cutter seat (20) is capable of driving the milling cutter to rotate at high speed; The chassis (1) is provided with a positioning structure, and the positioning structure can drive the tool holder (20) to move closer to or away from the lifting platform (2), so as to drive the milling cutter closer to the workpiece to be processed; A traveling structure is provided on the chassis (1); the traveling structure is capable of driving the tool holder (20) to move back and forth, thereby driving the high-speed rotating milling cutter to move along a set trajectory; The chassis (1) is provided with a flipping structure, which can drive the rotating base (3) to rotate 90 degrees and can drive the hydraulic cylinder (4) to flip 180 degrees, thereby driving the clamping block (5) to flip synchronously, thereby flipping the workpiece; The flip structure comprises a worm (12) rotatably mounted on the chassis (1); a worm wheel (302) meshing with the worm (12) is fixedly mounted on the rotating base (3); The flip structure further comprises a first bevel gear (401) fixedly connected to the hydraulic cylinder (4); a second bevel gear (6) meshing with the first bevel gear (401) is fixedly mounted on the chassis (1); A driving motor (7) is fixedly mounted on the chassis (1), and a fixed turntable (8) is fixedly mounted on the output end of the driving motor (7); a plurality of first tooth blocks (801) are fixedly mounted on the fixed turntable (8); a sliding turntable (9) is slidably engaged with the worm (12); a plurality of second tooth blocks (901) that can engage with the first tooth blocks (801) are fixedly mounted on the sliding turntable (9); a first spring (10) is sleeved on the worm (12); and two ends of the first spring (10) respectively contact the sliding turntable (9) and the worm (12).

2. A milling device for a cross groove of a universal joint shaft according to claim 1, characterized in that: The positioning structure comprises a plurality of columns (102) fixedly mounted on the chassis (1); a transverse guide rail (13) is provided on the chassis (1); a sliding sleeve (1302) is fixedly mounted on the transverse guide rail (13) and is slidably engaged with the column (102); a transverse screw column (16) is rotatably mounted on the transverse guide rail (13); a transverse slider (15) is slidably engaged with the transverse guide rail (13); a transverse threaded sleeve (1501) is fixedly mounted on the transverse slider (15) and is threadedly connected to the transverse screw column (16); and the tool holder (20) is connected to the transverse slider (15) via a crane structure.

3. A milling device for a cross groove of a universal joint shaft according to claim 2, characterized in that: The positioning structure further comprises a vertical screw column (14) rotatably mounted on the chassis (1); a vertical threaded sleeve (1301) threadedly connected to the vertical screw column (14) is fixedly mounted on the transverse guide rail (13).

4. A milling device for a cross groove of a universal joint shaft according to claim 3, characterized in that: The traveling structure comprises a longitudinal guide rail (17) fixedly mounted on the transverse slider (15); a longitudinal slider (18) slidably engaged on the longitudinal guide rail (17); the tool holder (20) is fixedly connected to the longitudinal slider (18); a longitudinal screw column (19) is rotatably mounted on the transverse slider (15); and a longitudinal threaded sleeve (1801) threadedly connected to the longitudinal screw column (19) is fixedly mounted on the longitudinal slider (18).

5. The milling device for the cross groove of a universal joint shaft according to claim 2, characterized in that: A telescopic column (21) is fixedly mounted on the transverse guide rail (13); a telescopic sleeve (22) is fixedly mounted on the chassis (1) and is slidably engaged with the telescopic column (21); a connecting rod (11) is rotatably mounted on the sliding turntable (9); a wedge block (1101) is fixedly mounted on the connecting rod (11) and is slidably engaged with the telescopic sleeve (22); a resisting block (24) is slidably engaged in contact with the wedge block (1101) in the telescopic sleeve (22); a second spring (23) is provided in the telescopic sleeve (22); two ends of the second spring (23) are in contact with the telescopic column (21) and the resisting block (24), respectively.

6. A milling device for a cross groove of a universal joint shaft according to claim 1, characterized in that: An annular baffle (301) is fixedly mounted on the rotating base (3).

7. The milling device for the cross groove of a universal joint shaft according to claim 1, characterized in that: A symmetrically arranged hatch (101) is slidably engaged on the chassis (1).

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