A milling device with a tilting cutter structure, a milling machine and a method for agricultural machinery production

Abstract

The present invention provides a milling device, a milling machine and a method with a tilting cutter structure for agricultural machinery production, which relate to the field of agricultural machinery processing equipment, including a ram body, a right-angle milling head box and a tilting cutter mechanism. The ram body is connected to the right-angle milling head box through a main shaft sleeve, an upper houndstooth disc is installed on the ram body, a lower houndstooth disc matching the upper houndstooth disc is installed on the right-angle milling head box, at least two sets of tilting cutter mechanisms are installed on the right-angle milling head box, the tilting cutter mechanisms are circumferentially spaced and distributed along the upper houndstooth disc, the output end of the tilting cutter mechanism abuts against the upper houndstooth disc, and the tilting angle of the milling cutter disc connected to the right-angle milling head box is adjusted. In view of the problem that the milling cutter disc is difficult to tilt in the current structure, a connection is established between the ram body and the right-angle milling head box through a pair of matching houndstooth discs, the tilting cutter mechanism is used to drive the houndstooth disc to rotate to overcome the friction force clamped by the main shaft sleeve, and the right-angle milling head box is driven to rotate relative to the ram body, so as to adjust the tilting angle of the milling cutter disc on the right-angle milling head box.

Description

Technical Field

[0001] The invention relates to the field of agricultural machinery processing equipment, and in particular to a milling device, a milling machine and a method with a tilting cutter structure for agricultural machinery production. Background Art

[0002] There are many large machine base parts and large box parts in agricultural machinery. For some parts with high assembly precision requirements, casting is not suitable. CNC gantry boring and milling machines can be widely used for rough and fine processing of large machine base parts and large box parts with complex shapes. Equipped with corresponding right-angle attachment milling heads, it can complete the plane processing of multiple surfaces except the installation surface in one clamping. As the main functional component equipped with CNC gantry boring and milling machines, the right-angle attachment head can realize the conversion of vertical axis input of power into horizontal axis output. It also has the functions of automatic replacement and automatic tightening of the right-angle attachment milling head, automatic clamping of the tool, internal and external cooling of the tool, and cleaning of the spindle taper hole. The CNC gantry boring and milling machine automatically grabs and clamps the right-angle attachment milling head through the main milling head. The right-angle attachment head uses a large-diameter end milling cutter to process the side plane, that is, the "sweeping tool" phenomenon often occurs when processing in the XZ plane and YZ plane, which affects the processing quality of the workpiece surface, reduces the service life of the tool, and cannot meet the needs of high-precision processing.

[0003] At present, there are two main structural types of CNC gantry boring and milling machines that automatically replace accessory milling heads: one is that the main milling head of the machine tool realizes the loosening and clamping of the right-angle accessory milling head through four evenly distributed claws, and the C-axis automatic indexing mechanism is completely set on the accessory milling head; after the right-angle accessory milling head is clamped, the right-angle accessory milling head is adjusted as a whole to achieve three states of forward tilt, zero position and backward tilt. Because the clamping force of the right-angle accessory milling head is too large, the pressure of the tilting cylinder must be increased to overcome the friction generated by the clamping force of the right-angle accessory milling head, resulting in excessive pressure in the hydraulic system. In addition, its three piston positions correspond to the three states of the right-angle accessory milling head, resulting in too complicated hydraulic oil circuits. Another way of cooperation is that the main milling head of the machine tool pushes and pulls the spindle sleeve through the hydraulic cylinder to realize the loosening and clamping of the accessory milling head, and the C-axis automatic indexing mechanism is set inside the main milling head; but due to the complex internal structure of this cooperation method, the tilting function is currently difficult to achieve. Summary of the invention

[0004] The purpose of the present invention is to address the defects of the prior art and to provide a milling device, a milling machine and a method with a tilting cutter structure for use in agricultural machinery production. A connection between a ram body and a right-angle milling head box is established through a pair of matching hirth discs, and the tilting cutter mechanism is used to drive the hirth disc to rotate to overcome the friction force of the main shaft sleeve clamping, thereby driving the right-angle milling head box to rotate relative to the ram body, thereby achieving adjustment of the inclination angle of the milling cutter disc on the right-angle milling head box, thereby meeting the demand for precise tilting of the milling cutter disc.

[0005] The first object of the present invention is to provide a milling device with a tilting cutter structure for agricultural machinery production, which adopts the following scheme:

[0006] It includes a ram body, a right-angle milling head box and a tilting cutter mechanism. The ram body is connected to the right-angle milling head box through a main shaft sleeve. An upper hirth disc is installed on the ram body, and a lower hirth disc matching the upper hirth disc is installed on the right-angle milling head box. At least two sets of tilting cutter mechanisms are installed in the ram body. The tilting cutter mechanisms are distributed at intervals along the circumference of the upper hirth disc. The output end of the tilting cutter mechanism abuts against the upper hirth disc to drive the upper hirth disc to rotate around the axis and adjust the inclination angle of the milling cutter disc connected to the right-angle milling head box.

[0007] Furthermore, the knife tilting mechanism includes a piston rod and a mounting cavity arranged on the ram body, and the piston rod slides in cooperation with the mounting cavity to form a reciprocating driving member along the axial direction of the piston rod.

[0008] Furthermore, one end of the piston rod abuts against the upper houndstooth disk, and the other end faces the bottom surface of the installation cavity and extends into the installation cavity. The end of the piston rod is connected to the bottom surface of the installation cavity through an elastic member, and the installation cavity cooperates with the piston rod to form a driving cavity connected to an external power source.

[0009] Furthermore, the tilting knife mechanism is provided with a plurality of groups, with two sets in each group, and the two sets of tilting knife mechanisms in the same group are symmetrically arranged relative to the axis of the upper hirth disk.

[0010] Furthermore, all the knife tilting mechanisms are evenly spaced along the circumferential direction of the upper hirth disk, and the knife tilting mechanisms in the same group act synchronously.

[0011] Furthermore, the knife tilting mechanism is connected to a control valve, and the control valve is connected to part of the knife tilting mechanism through a first branch and is connected to the rest of the knife tilting mechanism through a second branch.

[0012] Furthermore, the control valve is provided with three working positions, the first working position corresponds to being connected to the first branch, the second working position corresponds to being connected to the second branch, and the third working position is separated from the first branch and the second branch.

[0013] Furthermore, one end of the main shaft sleeve extends into the ram body, and a clamp release assembly is provided on the main shaft sleeve outer sleeve, which is installed on the ram body. The clamp release assembly is used to drive the main shaft sleeve to reciprocate along the axis to lock or unlock the right-angle milling head box.

[0014] The second object of the present invention is to provide a milling machine for agricultural machinery production, including a milling device with a tilting cutter structure for agricultural machinery production as described in the first object.

[0015] The third object of the present invention is to provide a working method, using the milling device with a tilting cutter structure for agricultural machinery production as described in the first object, comprising the following steps:

[0016] Adjust the position of the main shaft sleeve so that the main shaft sleeve cooperates with the ram body to clamp the right-angle milling head box;

[0017] The tilting mechanism performs a first action, driving the lower hirth disc to rotate along a first rotation direction through the upper hirth disc, and driving the milling cutter disc located in the right-angle milling head box to tilt the cutter in the first direction;

[0018] The tilting mechanism performs a second action, driving the lower hirth disc to rotate along a second rotation direction through the upper hirth disc, and driving the milling cutter disc located in the right-angle milling head box to tilt the cutter in the second direction;

[0019] The tilting mechanism returns to its original position, driving the milling cutter disc located in the right-angle milling head box to return to its original position.

[0020] Compared with the prior art, the present invention has the following advantages and positive effects:

[0021] (1) In view of the problem that the current structure is difficult to achieve the tilting of the milling cutter disc, a connection between the ram body and the right-angle milling head box is established through a pair of matching hirth discs, and the tilting mechanism is used to drive the hirth disc to rotate to overcome the friction force of the main shaft sleeve clamping, and drive the right-angle milling head box to rotate relative to the ram body, so as to adjust the inclination angle of the milling cutter disc on the right-angle milling head box, thereby meeting the demand for precise tilting of the milling cutter disc.

[0022] (2) The tilting mechanism is arranged on the ram body, and the motion is transmitted by the hirth plate. The self-centering principle of the upper and lower hirth plates is used to make the main shaft axis of the right-angle attachment head rotate around the center of the ram by a certain angle, thereby realizing the forward or backward tilt of the right-angle attachment milling head, and then realizing the forward tilt, zero position and backward tilt of the large diameter end milling cutter disc. When it is in the forward tilt or backward tilt position, the "sweeping cutter" phenomenon can be eliminated.

[0023] (3) By opening and closing different oil circuits, the upper hirth disc can be rotated clockwise, to zero position, and to counterclockwise. The clockwise and counterclockwise rotations of the upper hirth disc can change the position of the spindle axis of the right-angle attachment head under the automatic centering of the upper and lower hirth discs, thereby achieving forward or backward tilt and improving the surface processing quality of the workpiece.

[0024] (4) The upper hinging disc is provided with multiple sets of tilting knife mechanisms, which are arranged in pairs and the same pair of tilting knife mechanisms are located at both ends of the diameter of the upper hinging disc, and jointly drive the upper hinging disc to move, ensuring smooth transmission to achieve precise adjustment and avoiding the problem of insufficient cutting working surface caused by excessive tilting knife angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1It is a front view of a milling device with a tilting cutter structure for agricultural machinery production in Example 1 or 2 of the present invention.

[0027] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle.

[0028] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure at BB in the middle.

[0029] Figure 4 for Figure 2 A partial enlarged view of point D in the middle.

[0030] Figure 5 for Figure 2 A partial enlarged view of point E in the middle.

[0031] Figure 6 for Figure 2 A partial enlarged view of point F in the middle.

[0032] Figure 7 for Figure 2 A partial enlarged view of point G in the middle.

[0033] Figure 8 for Figure 3 A partial enlarged view of point C in the middle.

[0034] Fig. 9 It is a schematic diagram of the state of the right-angle accessory head at zero position after the main milling head is removed in Example 1 or 2 of the present invention.

[0035] Fig.10 It is a schematic diagram of the state of the right-angle accessory head tilted forward after the main milling head is removed in Example 1 or 2 of the present invention.

[0036] Fig.11 It is a schematic diagram of the state of the right-angle accessory head tilted backward after the main milling head is removed in Example 1 or 2 of the present invention.

[0037] In the figure, 1 ram body, 2 hexagonal screw, 3 inner gear ring, 4 outer gear, 5 sleeve, 6 thrust bearing, 7 cylinder head, 8 large piston, 9 bearing sleeve adjustment pad, 10 bearing sleeve, 11 large cylinder body, 12 positioning sleeve, 13 small screw, 14 positioning sleeve adjustment pad, 15 transmission shaft, 16 oil inlet nozzle, 17 disc spring, 18 right angle milling head box, 19 large screw, 20 connector, 21 spindle sleeve, 22 lower hirth plate, 23 upper hirth plate, 24 support sleeve screw, 25 guide ring, 2 6 support sleeve, 27 large oil cylinder adjustment pad, 28 first retaining ring, 29 first sealing ring, 30 first plug socket, 31 second sealing ring, 32 second retaining ring, 33 second plug socket, 34 third sealing ring, 35 fourth sealing ring, 36 fifth sealing ring, 37 third retaining ring, 38 cover, 39 elastic element, 40 first cylinder body, 41 fourth retaining ring, 42 sixth sealing ring, 43 seventh sealing ring, 44 fifth retaining ring, 45 first piston rod, 46 first piston rod adjustment pad. DETAILED DESCRIPTION

[0038] Example 1

[0039] In a typical embodiment of the present invention, Figure 1-Figure 11 As shown, a milling device with a tilting cutter structure for use in agricultural machinery production is provided.

[0040] like Figure 1 and Figure 2 The milling device with a tilting cutter structure for agricultural machinery production shown in the figure is used for finishing workpieces such as large machine base parts and large box parts, especially the base and box of agricultural machinery equipment. It solves the "sweeping cutter" problem existing when the traditional CNC gantry boring and milling machine uses a large diameter end milling cutter disc to process the side plane through a right-angle attachment head, improves the processing quality of the workpiece surface and the service life of the tool, meets the needs of high-precision processing, and at the same time reduces the pressure of the hydraulic system and ensures the stability of the hydraulic system.

[0041] like Figure 2 , Figure 3 As shown, the milling device with a tilting cutter structure for agricultural machinery production is achieved by installing multiple driving tilting cutter mechanisms on the ram body 1. The tilting cutter mechanisms act on the upper houndstooth disc 23, and the upper houndstooth disc 23 is installed in the ram body 1. The upper houndstooth disc 23 is pushed to overcome the friction force and produce a small rotation through the extension and retraction of the tilting cutter mechanism, and then the main shaft sleeve 21 is tightened by the hydraulic cylinder in the main milling head of the machine tool, thereby achieving the clamping of the right-angle milling head. The lower houndstooth disc 22 is installed on the right-angle milling head. The self-centering effect of the upper houndstooth disc 23 and the lower houndstooth disc 22 makes the main shaft axis of the right-angle milling head rotate a certain angle around the center of the ram body 1, thereby achieving the forward or backward tilting of the right-angle milling head.

[0042] Combination Figure 1 and Figure 2The milling device with a tilting cutter structure for agricultural machinery production mainly includes a ram body 1, a right-angle milling head box 18, a hirth plate and a tilting cutter mechanism.

[0043] The ram body 1 is rotatably connected to the right-angle milling head box 18 through the main shaft sleeve 21. An upper hirth disc 23 is installed on the ram body 1, and a lower hirth disc 22 matching the upper hirth disc 23 is installed on the right-angle milling head box 18. At least two sets of tilting cutter mechanisms are installed in the ram body 1. The tilting cutter mechanisms are distributed circumferentially along the upper hirth disc 23. The output end of the tilting cutter mechanism abuts against the upper hirth disc 23 to drive the upper hirth disc 23 to rotate around the axis and adjust the inclination angle of the milling cutter disc connected to the right-angle milling head box 18.

[0044] like Figure 3 As shown, the tilting knife mechanism includes a first piston rod 45 and a mounting cavity arranged on the ram body 1 , and the piston rod and the elastic element 39 slide in cooperation with the mounting cavity to form a reciprocating driving member along the axial direction of the first piston rod 45 .

[0045] In this embodiment, one end of the first piston rod 45 abuts against the upper rat tooth plate 23, and the other end faces the bottom surface of the installation cavity and extends into the installation cavity. The end of the first piston rod 45 is connected to the bottom surface of the installation cavity through an elastic member, and the installation cavity cooperates with the first piston rod 45 to form a driving cavity connected to an external power source.

[0046] The two tilting knife mechanisms in the same group are arranged symmetrically relative to the axis of the upper houndstooth disk 23; the tilting knife mechanisms are arranged evenly spaced along the circumferential direction of the upper houndstooth disk 23, and the tilting knife mechanisms in the same group act synchronously.

[0047] In this embodiment, the tilting mechanism is a tilting cylinder, which is combined with a control valve to form a tilting cylinder assembly, which is arranged at the lower part of the ram body 1. The tilting cylinder assembly is composed of a cover 38, an elastic element 39, a first cylinder body 40, a fourth retaining ring 41, a sixth sealing ring 42, a seventh sealing ring 43, a fifth retaining ring 44, a first piston rod 45, a first piston rod adjustment pad 46, a three-position four-way electromagnetic reversing valve and a corresponding hydraulic system.

[0048] like Figure 8 , Figure 3 As shown, a first cylinder body 40 is arranged on the ram body 1, a first piston rod 45 is slidably matched with the first cylinder body 40, and one end of the first piston rod 45 abuts against the upper hive plate 23, and the other end extends into the first cylinder body 40, a piston part of the first piston rod 45 is slidably connected and sealed with the first cylinder body 40, a fifth retaining ring 44 and a seventh sealing ring 43 are sleeved on the outer ring of the piston part, and a fourth retaining ring 41 and a sixth sealing ring 42 are sleeved on the outer ring of one end of the first piston rod 45 protruding into the cylinder body.

[0049] A cover 38 is mounted on the first cylinder body 40 by means of a hexagon socket screw 2, and an elastic element 39 is filled between the cover 38 and the end of the first piston rod 45 to apply elastic force to the first piston rod 45. A driving chamber is formed between the fifth sealing ring and the seventh sealing ring 43 inside the first cylinder body 40, and an oil inlet nozzle 16 is connected to the driving chamber to obtain external hydraulic oil to drive the piston rod to move. The elastic element 39 can be a rubber sheet, a spring, etc.

[0050] Taking the example of setting up four sets of tilting knife cylinders with the same control valve, the two sets of tilting knife cylinders located at the two ends of the same diameter of the upper hive disc 23 are connected as a group to the three-position four-way solenoid reversing valve through a branch. The four sets of tilting knife cylinders are divided into two groups. The first position of the three-position four-way solenoid reversing valve is connected to the first branch, and the second position is connected to the second branch.

[0051] According to actual processing needs, by placing the three-position four-way electromagnetic reversing valve in different positions, different oil circuit controls are realized, and different tilting cylinders are activated to achieve the three states of forward tilt, zero position and backward tilt of the large-diameter end milling cutter disc. When it is in the forward tilt or backward tilt position, the "sweeping cutter" phenomenon can be eliminated.

[0052] like Figure 3 As shown, when the three-position four-way electromagnetic reversing valve is in the middle position, the oil chambers in the four sets of tilting knife oil cylinders are the same as the T-port of the oil circuit, and no pressure can be built up in the tilting knife oil cylinders. The four sets of tilting knife oil cylinders are all in the initial state: the upper hickey plate 23 is in a balanced state under the joint action of the four first piston rods 45, and the four forces applied around the upper hickey plate 23 are realized by the initial pre-tightening elastic element 39. At this time, the right-angle milling head is tightened and the right-angle milling head is in the zero position, as shown in FIG. Fig. 9 As shown in the figure, using a large diameter cutter disc for machining in this state will cause "cutting tool sweeping" phenomenon, so using a large diameter cutter disc for milling should be avoided.

[0053] It can be understood that the four elastic elements 39 are all in a compressed state, and the torques generated by the two elastic elements 39 in the diagonal direction and the two elastic elements 39 in the other diagonal direction are equal in magnitude and opposite in direction. The compression amount of the elastic elements 39 is obtained by calculation and achieved by adjusting the first piston rod adjustment pad 46. The first small piston rod adjustment pad is located at the position where the first piston rod 45 abuts against the upper rat tooth disk 23, and is located between the first piston rod 45 and the upper rat tooth disk 23.

[0054] When the three-position four-way solenoid reversing valve is in the left position, the hydraulic oil circuit B is connected to the P port, and the hydraulic oil enters the lower left and upper right hydraulic cylinders. The oil chambers of the two sets of diagonal tilting knife oil cylinders connected by the oil circuit A are the same as the T port. The first piston rod 45 overcomes the friction force of the upper houndstooth disk 23 under the push of the hydraulic pressure and compresses the elastic elements 39 in the upper left and lower right corners again. A part of the hydraulic pressure offsets the elastic force in the elastic elements 39 in the upper left and lower right corners, and the other part of the hydraulic pressure overcomes the friction force of the upper houndstooth disk 23. The driving force applied to the upper houndstooth disk 23 is greater than the clamping friction force of the upper houndstooth disk 23, so that the upper houndstooth disk 23 produces a slight rotation to complete the adjustment. At this time, the right-angle milling head is tightened. Under the action of the automatic centering of the lower houndstooth disk 22 and the upper houndstooth disk 23, the right-angle milling head realizes a slight clockwise rotation, so that it is in a forward tilting position, such as Fig.10 shown.

[0055] When the three-position four-way solenoid reversing valve is in the right position, the hydraulic oil circuit A is connected to the P port, and the hydraulic oil enters the lower right corner and the upper left corner tipping cylinders. The oil chambers of the two sets of diagonal tipping cylinders connected to the hydraulic oil circuit B are the same as the T port. The first piston rod 45 overcomes the friction force of the upper houndstooth plate 23 under the push of the hydraulic pressure and compresses the elastic elements 39 in the upper right corner and the lower left corner again, so that the upper houndstooth plate 23 produces a slight rotation. At this time, the right-angle milling head is tightened, and the right-angle milling head realizes a slight counterclockwise rotation under the action of the automatic centering of the houndstooth plate, so that it is in a backward tilting position, such as Fig.11 shown.

[0056] To achieve forward or backward tilt, the appropriate hydraulic pressure must be designed through calculation. If the pressure is insufficient, the pressure relay SP1 or SP2 will sound an alarm. As long as the hydraulic pressure can overcome the friction generated by the upper hive disc 23 and the re-preload force of the elastic element 39, the magnitude of the friction force is generated by the disc spring 17 installed face to face. The friction force of the hive disc is obtained by calculating the compression amount of the disc spring 17.

[0057] like Figure 4-Figure 7 As shown, one end of the main shaft sleeve 21 extends into the slide body 1, and a clamping assembly is provided on the outer cover of the main shaft sleeve 21. The clamping assembly is installed on the slide body 1, and the clamping assembly is used to drive the main shaft sleeve 21 to reciprocate along the axis to lock or unlock the right-angle milling head box 18.

[0058] like Figure 2 As shown, a load-bearing sleeve adjustment pad 9, a load-bearing sleeve 10, a positioning sleeve 12, a positioning sleeve adjustment pad 14, and a support sleeve 26 are sequentially sleeved axially along the outer side of the main shaft sleeve, wherein the positioning sleeve 12 is mounted on the ram body 1 by means of small screws 13, and the support sleeve 26 is mounted on the ram body 1 by means of support sleeve screws 24, and a guide ring 25 is arranged between the support sleeve 26 and the main shaft sleeve 21.

[0059] The clamping release assembly is an automatic clamping release assembly for a right-angle milling head, which includes a large piston 8, a first retaining ring 28, a first sealing ring 29, a first plug socket 30, a second sealing ring 31, a second retaining ring 32, a second plug socket 33, a third sealing ring 34, a fourth sealing ring 35, a fifth sealing ring 36, a third retaining ring 37 and a main shaft sleeve 21; the large piston 8 is sleeved on the outside of the main shaft sleeve 21, the large piston 8 is slidably matched with the large cylinder body 11, and the large cylinder body 11 is fixed on the slide body. At the same time, the end of the large cylinder body 11 is matched with a cylinder head 7, and the cylinder head 7 and the large piston 8 cooperate with the cylinder body to form an oil chamber, the first plug socket 30 is connected to the first oil chamber, and the second plug socket 33 is connected to the second oil chamber; a sleeve 5 is sleeved on the outside of the main shaft sleeve 21, and a thrust bearing 6 is provided between the sleeve 5 and the large piston 8, and the inner gear ring 3 is installed on the sleeve 5 by an inner hexagon screw 2.

[0060] A large oil cylinder adjustment pad 27 is arranged between one end of the large piston 8 and the main shaft sleeve 21, a first retaining ring 28 and a first sealing ring 29 are sleeved on the outer circumference of one end close to the large oil cylinder adjustment pad, and a fifth sealing ring 36 and a third retaining ring 37 are sleeved on the outer circumference of the other end. A second sealing ring 31 and a second retaining ring 32 are arranged at the matching position between the large piston 8 and the inner wall of the large cylinder body 11, and the second sealing ring 31 and the second retaining ring 32 isolate the first oil chamber from the second oil chamber.

[0061] The first plug socket 30 is filled with oil, the large piston 8 moves downward to push the main shaft sleeve 21 downward, and the accessory milling head is disengaged from the ram body. At this time, the three states of the accessory milling head can be adjusted. After the adjustment is completed, the second plug socket 33 is filled with oil, the large piston 8 moves upward to push the main shaft sleeve 21 upward, the accessory milling head is combined with the ram body, and the clamping of the accessory milling head is completed.

[0062] When the three-position four-way electromagnetic reversing valve is in the middle position, the first plug seat 30 is connected to the hydraulic oil, and the lower chamber of the hydraulic cylinder is filled with oil. The hydraulic oil overcomes the gravity of the accessory milling head, the main shaft sleeve 21, the inner gear ring 3, the sleeve 5, the thrust bearing 6 and related parts to push the large piston 88 upward, so that the main shaft sleeve 21 tightens the right-angle milling head. At this time, the right-angle milling head is in the zero position; from the zero position to the forward tilt, the second plug seat 33 is connected to the oil inlet, the upper chamber of the hydraulic cylinder is filled with oil, the first plug seat 30 is connected to the oil return port, and the main shaft sleeve 21 moves downward to relax the right-angle milling head. Then, the three-position four-way electromagnetic reversing valve is placed in the left position, and the first piston rod 45 pushes the upper houndstooth disk 23 to produce a slight rotation. At this time, the right-angle milling head is tightened, and the right-angle milling head realizes a slight clockwise rotation under the action of the automatic centering of the houndstooth disk, so that it is in the forward tilting position.

[0063] From forward tilt to zero position, the second plug socket 33 is connected to the oil inlet, the first plug socket 30 is connected to the oil return port, and the main shaft sleeve 21 moves down to relax the right-angle milling head. Then, the three-position four-way electromagnetic reversing valve is placed in the middle position, and the hydraulic oil in the four sets of tilting knife cylinders are all connected back to the oil circuit. The elastic elements 39 in the upper left corner and the lower right corner that are compressed again overcome the friction force of the upper houndstooth disk 23 under the action of their own elastic force, so that the upper houndstooth disk 23 can achieve a slight clockwise rotation and return to the initial zero position, and the upper houndstooth disk 23 can achieve balance again.

[0064] From zero position to backward tilt is the action of another pair of diagonal tilt knife cylinders. The process is the same as mentioned above and will not be repeated here.

[0065] The lower hickey disc 22, the upper hickey disc 23 and the connecting screws constitute the hickey disc automatic centering assembly. The upper hickey disc 23 is elastically fixed to the ram body 1 by a plurality of disc springs 17 and a plurality of screws installed face to face. The friction force generated by fixing the upper hickey disc 23 is calculated by the compression amount of the disc spring 17, and the friction force is designed to be smaller than the force generated by the diagonal tilting cutter cylinder through design calculation, so as to ensure the stable conversion of the forward tilt, zero position and backward tilt of the right-angle attachment milling head. The lower hickey disc 22 is fixed to the right-angle milling head box 18 by a plurality of screws to make it rigidly connected. The forward tilt, zero position and backward tilt functions of the right-angle milling head are realized by the self-centering function of the hickey disc.

[0066] The transmission shaft 15 is the intermediate link of power transmission. The motor transmits power to the transmission shaft 15 through the reduction gear box. On the one hand, the transmission shaft 15 transmits the main force to the main shaft (not shown in the figure), and on the other hand, it provides power for the automatic indexing of the right-angle accessory milling head. The upper chamber of the hydraulic cylinder enters oil, and the lower chamber returns oil. The main shaft sleeve 21, the inner gear ring 3 and related parts move downward, and the inner gear ring 3 is meshed with the outer gear 4. The rotation of the transmission shaft 15 drives the main shaft sleeve 21 to rotate synchronously. The main shaft sleeve 21 drives the right-angle accessory milling head to rotate through related parts to achieve automatic indexing.

[0067] Example 2

[0068] In another typical embodiment of the present invention, Figure 1-Figure 11 As shown, a milling machine for agricultural machinery production is provided.

[0069] The milling machine for agricultural machinery production is equipped with the milling device with tilting cutter structure for agricultural machinery production in Example 1.

[0070] For the detailed structure of the milling device with a tilting cutter structure for agricultural machinery production, please refer to Example 1. Since the milling machine for agricultural machinery production adopts the milling device with a tilting cutter structure for agricultural machinery production provided in the above-mentioned Example 1, the beneficial effects brought about by the milling device with a tilting cutter structure for agricultural machinery production on the milling machine for agricultural machinery production refer to the corresponding parts in the above-mentioned Example 1 and will not be repeated here.

[0071] For other structures of the milling machine for agricultural machinery production not mentioned, the existing structures can be adopted.

[0072] Example 3

[0073] In another typical embodiment of the present invention, Figure 1-Figure 11 As shown, a working method is given.

[0074] In conjunction with Example 1, a working method of a milling device with a tilting cutter structure for agricultural machinery production includes the following steps:

[0075] Adjust the position of the main shaft sleeve 21 so that the main shaft sleeve 21 cooperates with the ram body 1 to clamp the right-angle milling head box 18;

[0076] The tilting mechanism performs a first action, driving the lower hirth disc 22 to rotate along a first rotation direction through the upper hirth disc 23, and driving the milling cutter disc located in the right-angle milling head housing 18 to tilt the cutter in the first direction;

[0077] The tilting mechanism performs a second action, driving the lower hirth disc 22 to rotate along the second rotation direction through the upper hirth disc 23, and driving the milling cutter disc located in the right-angle milling head box 18 to tilt the cutter in the second direction;

[0078] The tilting mechanism returns to its original position, driving the milling cutter disc located in the right-angle milling head box 18 to return to its original position.

[0079] The first rotation direction is opposite to the second rotation direction, and the first direction is opposite to the second direction, such as the forward tilt and backward tilt processes in Example 1.

[0080] It can be understood that the right-angle milling head box 18 is adjusted according to actual needs to achieve clockwise slight rotation, zero position, and counterclockwise slight rotation of the upper houndstooth disk 23, wherein the clockwise slight rotation and counterclockwise slight rotation of the upper houndstooth disk 23 cause the position of the main shaft axis of the right-angle attachment head to change relatively under the action of the automatic centering of the upper and lower houndstooth disks 22, thereby achieving forward or backward tilting and improving the processing quality of the workpiece surface.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A milling device with a tilting cutter structure for agricultural machinery production, characterized in that: It comprises a ram body, a right-angle milling head housing and a tilting cutter mechanism, wherein the ram body is connected to the right-angle milling head housing through a main shaft sleeve, an upper hirth disc is installed on the ram body, a lower hirth disc matching the upper hirth disc is installed on the right-angle milling head housing, at least two sets of tilting cutter mechanisms are installed on the ram body, the tilting cutter mechanisms are distributed at intervals along the circumference of the upper hirth disc, and the output end of the tilting cutter mechanism abuts against the upper hirth disc to drive the upper hirth disc to rotate around the axis to adjust the tilt angle of the milling cutter disc connected to the right-angle milling head housing; The tilting knife mechanism comprises a piston rod and a mounting cavity arranged on the ram body, and the piston rod slides and matches the mounting cavity to form a reciprocating driving member along the axial direction of the piston rod; One end of the piston rod abuts against the upper houndstooth disk, and the other end faces the bottom surface of the installation cavity and extends into the installation cavity. The end of the piston rod is connected to the bottom surface of the installation cavity through an elastic member, and the installation cavity cooperates with the piston rod to form a driving cavity connected to an external power source; One end of the main shaft sleeve extends into the ram body, and a clamp release assembly is provided on the main shaft sleeve outer shell. The clamp release assembly is installed on the ram body. The clamp release assembly is used to drive the main shaft sleeve to reciprocate along the axis to lock or unlock the right-angle milling head box.

2. The milling device with a tilting cutter structure for agricultural machinery production according to claim 1, characterized in that: The knife tilting mechanism is provided with multiple groups, each group has two sets, and the two sets of knife tilting mechanisms in the same group are symmetrically arranged relative to the axis of the upper hirth disk.

3. The milling device with a tilting cutter structure for agricultural machinery production as claimed in claim 2, characterized in that: All the tilting knife mechanisms are evenly spaced along the circumferential direction of the upper hirth disk, and the tilting knife mechanisms in the same group move synchronously.

4. A milling machine for agricultural machinery production, characterized in that: It comprises a milling device with a tilting cutter structure for agricultural machinery production as described in any one of claims 1 to 3.

5. A method for operating the milling device with a tilting cutter structure for agricultural machinery production as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: Adjust the position of the main shaft sleeve so that the main shaft sleeve cooperates with the ram body to lock the right-angle milling head box; The tilting mechanism performs a first action, driving the lower hirth disc to rotate along a first rotation direction through the upper hirth disc, and driving the milling cutter disc located in the right-angle milling head box to tilt the cutter in the first direction; The tilting mechanism performs a second action, driving the lower hirth disc to rotate along a second rotation direction through the upper hirth disc, and driving the milling cutter disc located in the right-angle milling head box to tilt the cutter in the second direction; The tilting mechanism returns to its original position, driving the milling cutter disc located in the right-angle milling head box to return to its original position.

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