A rolling head for a crankshaft fillet rolling machine

Abstract

The application provides a rolling head for a crankshaft fillet rolling machine, and belongs to the technical field of crankshaft fillet processing. The rolling head comprises an executing device and a bridge type seat. The executing device is provided with two groups and is respectively installed on the two sides inside the bridge type seat. The executing device comprises an outer cylinder shell. An inner cylinder shell is fixedly installed on the inner wall of the middle part of the outer cylinder shell. An annular inner clamping groove is formed on the inner wall of the bottom of the outer cylinder shell. The rolling head has self-adaptive floating compensation function when the processing instantaneous pressure of the pressure head suddenly changes. The adverse effects caused by the instantaneous pressure change can be avoided. At the same time, when burrs and protrusions appear on the workpiece processing surface, the slow pressure assembly can share and absorb the shock force caused by the vibration of the pressure head, and the influence caused by the vibration can be reduced. The problems of low processing precision and easy damage of the rolling head are solved.

Description

Technical Field

[0001] This invention relates to the field of crankshaft fillet machining technology, and particularly to a rolling head for a crankshaft fillet rolling machine. Background Technology

[0002] The crankshaft is a core load-bearing component of power equipment such as internal combustion engines, construction machinery, and generator sets. During operation, it continuously bears complex alternating loads such as torsion, bending, and impact. The journal transition fillet is the area where stress concentration is most significant, and it is extremely prone to fatigue cracks. It is a key part that determines the overall service life of the crankshaft.

[0003] Traditional roller burnishers often employ fixed, single hydraulic, or single spring pressure structures. When the crankshaft blank experiences radial runout during crankshaft rotation due to roundness errors or journal dimensional tolerances, fixed roller burnishers lack floating compensation, easily damaging the workpiece. Single hydraulic or single spring burnishers have low self-adaptive capabilities, and structures relying on springs to provide rolling pressure are prone to creep fatigue under long-term alternating loads. When machining thin-walled crankshafts, excessive clamping of the rollers during feed can easily occur. When the crankshaft is impacted and deformed, the blank protrusion instantaneously overloads, easily causing the carbide rollers to break or damaging the crankshaft fillet working surface. Furthermore, when the crankshaft blank has burrs or protrusions on the machining surface, the roller burnisher will be squeezed during crankshaft rotation, causing prolonged vibration and damaging the roller burnisher.

[0004] Therefore, this application provides a rolling head for a crankshaft fillet rolling machine to meet the requirements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a rolling head for a crankshaft fillet rolling machine. By setting two sets of springs in conjunction with a hydraulic system and a pressure-reducing component, when the pressure of the rolling head changes suddenly during processing, the rolling head has an adaptive floating compensation function, which can avoid the adverse effects caused by the sudden change in pressure. At the same time, when burrs or protrusions appear on the workpiece surface, the pressure-reducing component can share and absorb the vibration force generated by the vibration of the rolling head, reducing the impact of the vibration, so as to solve the problems of low processing accuracy and easy damage of existing rolling heads.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A crankshaft fillet rolling head for a crankshaft fillet rolling machine includes an actuator and a bridge-type seat. Two sets of actuators are provided and installed on opposite sides inside the bridge-type seat. Each actuator includes an outer cylinder shell. An inner cylinder shell is fixedly installed on the inner wall of the middle portion of the outer cylinder shell. An annular inner groove is formed on the bottom inner wall of the outer cylinder shell. A movable cylinder shell is slidably connected to the bottom inner wall of the outer cylinder shell, and the outer wall of the movable cylinder shell cooperates with the annular inner groove. A pressure-relieving component is installed on the bottom inner wall of the movable cylinder shell, and the top inner wall of the movable cylinder shell slides in cooperation with the bottom outer wall of the inner cylinder shell.

[0007] Optionally, a sealing block is slidably connected to the top inner wall of the inner cylinder shell, and a T-shaped push seat is fixedly installed on the middle inner wall of the sealing block. The T-shaped push seat slidably passes through the bottom of the inner cylinder shell. A spring is sleeved on the outer wall of the T-shaped push seat located inside the inner cylinder shell. One end of the spring is fixedly connected to the bottom of the sealing block, and the other end is fixedly connected to the bottom inner wall of the inner cylinder shell. An air supply pipe is provided on the inner wall of the outer cylinder shell, and the air supply pipe communicates with the top of the movable cylinder shell. An oil supply pipe is provided on the middle inner wall of the outer cylinder shell, and the oil supply pipe communicates with the inside of the inner cylinder shell.

[0008] Optionally, the pressure relief assembly includes a stop seat, a second spring is fixedly installed on the top of the stop seat, and the other end of the second spring is fixedly connected to the bottom of the T-shaped push seat. Multiple sets of stacked disc springs are sleeved on the outer wall of the stop seat, and the outer wall of the disc springs contacts the inner wall of the movable cylinder shell.

[0009] Optionally, the movable cylindrical shell is provided with an inner seat, the outer wall of the inner seat is uniformly provided with multiple sets of spherical clamping grooves I, the inner wall of the movable cylindrical shell is uniformly provided with multiple sets of spherical clamping grooves II, and the spherical clamping grooves II are connected to the corresponding spherical clamping grooves I. The inner side of the inner seat is provided with a sliding copper ring, and the sliding copper ring is located between the inner seat and the movable cylindrical shell. The inner wall of the sliding copper ring is engaged with multiple sets of copper balls, and the copper balls are located between the corresponding spherical clamping grooves I and II.

[0010] Optionally, an internally threaded sleeve is inserted into the inner wall of the insert seat, a screw head is fixedly installed on the side wall of the stop seat and the screw head engages with the internally threaded sleeve, a clamp is fixedly installed on the outer wall of the internally threaded sleeve, a tool holder is fixedly installed on the clamp, a pressure head is inserted into the front end of the tool holder and the pressure head can process the workpiece.

[0011] Optionally, a liquid passage groove is provided on the inner wall of the outer cylinder shell, the top of the liquid passage groove is connected to coolant, and a liquid guide pipe is fixedly installed at the other end of the liquid passage groove. The liquid guide pipe is fixedly inserted through the knife holder, and the outlet end of the liquid guide pipe is aligned with the pressure head.

[0012] Optionally, a main shaft is rotatably connected to the inner corner of both sides of the bridge-type seat, and a sector gear is rotatably connected to the main shaft. Limiting grooves are opened on the inner walls of both sides of the bottom of the sector gear. Two sets of limiting posts are fixedly installed at the inner corner of both sides of the bridge-type seat, and the limiting posts are located in the corresponding limiting grooves.

[0013] Optionally, mounting seats are fixedly installed on both sides of the outer shell. Two sets of fastening grooves are opened on the inner wall of the sector gear. A guide groove is opened on the top of the sector gear. A fastening plate is slidably connected to the inner wall of the sector gear. A guide block is fixedly installed on the top of the fastening plate and is slidably connected to the inner wall of the guide groove. Fastening bolts are engaged at the four corners of the fastening plate. The fastening bolts are used in conjunction with the fastening grooves. The fastening plate is fixedly connected to the sector gear by tightening the fastening bolts. A connecting block is fixedly installed on the end wall of the fastening plate and is used in conjunction with the corresponding mounting seat.

[0014] Optionally, the bridge-type seat has an inner groove on its top inner wall, a pressure seat inside the bridge-type seat, and side sliding grooves on both sides of the bridge-type seat. The end walls of the pressure seat on both sides are slidably connected to the two sets of side sliding grooves respectively. A replaceable pad is engaged with the inner wall of the inner groove, and the bottom of the replaceable pad is engaged with the top of the pressure seat. The bridge-type seat, the replaceable pad, and the pressure seat can be fixedly connected by bolts. Racks are fixedly installed on both sides of the pressure seat. Two sets of gears are rotatably connected to both sides of the inner wall of the bridge-type seat, and the gears mesh with the corresponding racks and sector gears.

[0015] Optionally, a rubber sleeve is fixedly installed on the outer wall of the bridge-type seat, and the rubber sleeve encloses the actuator.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up two sets of springs in conjunction with a hydraulic system, a sliding fit structure is formed by the outer cylinder shell, the movable cylinder shell, and the annular inner groove. Combined with pneumatic and hydraulic joint drive, the rolling head has an adaptive floating compensation function. During processing, when the pressure of the rolling head changes suddenly during the crankshaft rotation, the rolling head can transmit the sudden pressure change to spring two, spring one, and hydraulic oil, causing spring two and spring one to deform. The hydraulic oil absorbs the vibration generated, thereby sharing the impact of the sudden pressure change. This avoids the problems of local overpressure damage and insufficient underpressure reinforcement in some areas of the crankshaft fillet after processing. At the same time, the use of a combined hydraulic and multi-set elastic element pressure mode replaces a single spring or a single hydraulic structure, which greatly improves the overall adaptive capability and avoids the problems of creep and fatigue failure of pure spring structure under long-term alternating load.

[0017] By setting up a pressure-reducing component consisting of a stop, a second spring, and multiple sets of stacked disc springs, when the crankshaft blank experiences bulging or impact deformation that generates instantaneous overload, or when the pressure head tends to over-clamp and feed during the machining of a thin-walled crankshaft, the stacked disc springs can quickly and slightly compress to absorb the instantaneous impact load. Together with the two-stage springs, they can unload and buffer the load, which can limit the pressure head feed and prevent over-clamping, as well as prevent the carbide pressure head from cracking due to instantaneous load. At the same time, it can prevent the crankshaft fillet working surface from being damaged, greatly improving the operational stability under extreme working conditions.

[0018] By incorporating a pressure-reducing component, when burrs compress the pressure head during crankshaft rotation, causing it to vibrate, the pressure head will drive the tool holder and clamp to vibrate, which in turn drives the internal threaded sleeve to vibrate. At this time, the internal threaded sleeve can transmit the vibration force to the inner insert, causing the inner insert to drive the copper ball to sway. In the form of point contact, the pressure-reducing component inside the movable cylinder can follow the pressure head in slight swaying, thereby preventing the pressure head from being damaged by vibration for a long time and extending its service life. Attached Figure Description

[0019] Figure 1 A three-dimensional structural diagram of a rolling head for a crankshaft fillet rolling machine; Figure 2 This is a schematic diagram of the installation of the rubber sleeve; Figure 3 This is a schematic diagram of the assembly of two sets of actuators and bridge-type seats; Figure 4 This is a schematic diagram showing the fit between a rack, gear, and sector gear. Figure 5 This is a schematic diagram of the assembly of two sets of actuators and the pressure seat; Figure 6 This is a schematic diagram of the actuator. Figure 7 This is a schematic diagram of the assembly of the components on the sector gear; Figure 8 Left view showing the disassembled components of the sector gear; Figure 9 The right view showing the disassembled components of the sector gear; Figure 10 This is a schematic diagram of the pressure head assembly; Figure 11 This is a cross-sectional view of the actuator; Figure 12 This is a schematic diagram of the assembly of the outer shell, inner shell, and part of the movable shell. Figure 13 This is a schematic diagram of the pressure relief component. Figure 14 This is a breakdown diagram of the pressure relief component; Figure 15 This is a schematic diagram of the assembly of the pressure relief component; Figure 16 This is a schematic diagram of the assembly of the inner seat, the movable cylindrical shell, and the copper ball; Figure 17 This is a state diagram of the actuator when it is not in operation; Figure 18 This is a diagram showing the operating status of the actuator after ventilation. Figure 19 This is a diagram showing the operating status of the actuator after oil is supplied.

[0020] Figure label: 100. Actuator; 110. Outer shell; 111. Inner shell; 112. Annular inner groove; 113. Movable shell; 114. Gas pipe; 115. Sealing block; 116. T-shaped pusher; 117. Spring 1; 118. Oil pipe; 119. Spring 2; 120. Pressure relief assembly; 121. Stop; 122. Screw head; 123. Disc spring; 124. Embedded seat; 125. Spherical groove 1; 126. Spherical groove 2; 127. Sliding copper ring; 128. Copper ball; 129. Clamping seat; 130. Internal threaded sleeve ; 140, Tool holder; 141, Pressure head; 142, Fluid passage groove; 143, Fluid guide tube; 150, Mounting seat; 160, Sector gear; 161, Fastening groove; 162, Limiting groove; 163, Guide groove; 164, Fastening plate; 165, Guide block; 166, Fastening bolt; 167, Connecting block; 200, Bridge type seat; 210, Inner groove; 211, Side sliding groove; 212, Spindle; 213, Limiting post; 220, Replaceable pad; 230, Pressure seat; 231, Rack; 240, Gear; 250, Rubber sleeve. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0022] like Figures 1 to 19As shown, an embodiment of the present invention provides a rolling head for a crankshaft fillet rolling machine, including an actuator 100 and a bridge-type seat 200. Two sets of actuators 100 are provided and respectively installed on both sides inside the bridge-type seat 200. The actuator 100 includes an outer cylindrical shell 110, an inner cylindrical shell 111 fixedly installed on the inner wall of the middle portion of the outer cylindrical shell 110, and an annular inner groove 112 formed on the inner wall of the bottom of the outer cylindrical shell 110. A movable cylindrical shell 113 is slidably connected to the inner wall of the bottom of the outer cylindrical shell 110, and the outer wall of the movable cylindrical shell 113 cooperates with the annular inner groove 112. The annular inner groove 112 can limit the movement of the movable cylindrical shell 113. The bottom of the movable cylindrical shell 113... A pressure-reducing component 120 is installed on the inner wall of the part. The top inner wall of the movable cylinder shell 113 slides with the bottom outer wall of the inner cylinder shell 111. In this invention, when the crankshaft blank has roundness error or journal size tolerance, radial runout will occur during the crankshaft rotation process during processing, which can easily cause a sudden change in pressure of the pressure head 141 during processing. At this time, the pressure head 141 can transmit the sudden pressure to the second spring 119, the first spring 117 and the hydraulic oil, and cause the second spring 119 and the first spring 117 to deform. The hydraulic oil absorbs the vibration generated, thereby sharing the impact of the sudden pressure change and avoiding the problem of local overpressure scratches and insufficient underpressure reinforcement in some areas of the crankshaft fillet after processing.

[0023] like Figures 17 to 19 As shown, a sealing block 115 is slidably connected to the top inner wall of the inner cylinder shell 111. A T-shaped pusher 116 is fixedly installed on the inner wall of the middle part of the sealing block 115, and the T-shaped pusher 116 slidably passes through the bottom of the inner cylinder shell 111. The sealing block 115 can drive the T-shaped pusher 116 to move up and down synchronously. A spring 117 is sleeved on the outer wall of the T-shaped pusher 116 located inside the inner cylinder shell 111. One end of the spring 117 is fixedly connected to the bottom of the sealing block 115, and the other end is fixedly connected to the bottom inner wall of the inner cylinder shell 111. An air supply pipe 114 is opened on the inner wall of the outer cylinder shell 110, and the air supply pipe 114 is connected to the top of the movable cylinder shell 113. An oil supply pipe 118 is provided on the inner wall of the middle part of the shell 110, and the oil supply pipe 118 is connected to the interior of the inner shell 111. In this invention, before processing, high pressure gas is introduced into the outer shell 110 through the air supply pipe 114, which compresses the movable shell 113 and makes the side wall of the movable shell 113 engage with the annular inner groove 112. At this time, the movable shell 113 drives the T-shaped push seat 116 to move down, thereby driving the pressure head 141 to press against the crankshaft. After that, hydraulic oil is input through the oil supply pipe 118, which pushes the sealing block 115 downward, thereby driving the T-shaped push seat 116 to move further down, so that the spring 117 and the spring 219 are further compressed.

[0024] like Figures 11 to 13As shown, the pressure relief component 120 includes a stop seat 121. A second spring 119 is fixedly installed on the top of the stop seat 121, and the other end of the second spring 119 is fixedly connected to the bottom of the T-shaped push seat 116. Multiple sets of disc springs 123 are sleeved on the outer wall of the stop seat 121 and are arranged in a stacked manner. The outer wall of the disc springs 123 is in contact with the inner wall of the movable cylinder shell 113. In this invention, during the operation of the equipment, the instantaneous jumping impact load generated when the crankshaft rotates can be quickly absorbed by the instantaneous slight compression of the disc springs 123. At the same time, the hydraulic system continuously stabilizes the pressure, forming a dual pressure stabilization mechanism of precise hydraulic pressure stabilization and instantaneous shock absorption by the disc springs 123. Meanwhile, when the rolling pressure on the pressure head 141 is instantaneously overloaded, the disc springs 123 are passively compressed to absorb the final impact load, preventing damage to the workpiece.

[0025] like Figures 14 to 16 As shown, an inner seat 124 is provided inside the movable cylindrical shell 113. Multiple sets of spherical grooves 125 are evenly distributed on the outer wall of the inner seat 124, and multiple sets of spherical grooves 126 are evenly distributed on the inner wall of the movable cylindrical shell 113. The spherical grooves 126 communicate with their corresponding spherical grooves 125. A sliding copper ring 127 is provided outside the inner seat 124, and the sliding copper ring 127 is located between the inner seat 124 and the movable cylindrical shell 113. 7. Multiple sets of copper balls 128 are clamped to the inner wall, and the copper balls 128 are located between the corresponding spherical clamping groove 125 and spherical clamping groove 126. An internally threaded sleeve 130 is inserted into the inner wall of the inner seat 124. A screw head 122 is fixedly installed on the side wall of the stop 121, and the screw head 122 engages with the internally threaded sleeve 130. At this time, the components inside the pressure relief assembly 120 can be fixed. A clamping seat 129 is fixedly installed on the outer wall of the internally threaded sleeve 130. A tool holder 140 is fixedly installed on the base 129. A pressure head 141 is inserted into the front end of the tool holder 140 and can process the workpiece. In this invention, when burrs appear on the crankshaft blank, during processing, the burrs will squeeze the pressure head 141 during the crankshaft rotation, causing the pressure head 141 to vibrate. When the pressure head 141 vibrates, it will drive the tool holder 140 and the clamp 129 to vibrate, thereby driving the internal thread sleeve 130 to vibrate. At this time, the internal thread sleeve 130 can transmit the vibration force to the inner insert 124, causing the inner insert 124 to drive the copper ball 128 to shake. In the form of point contact, it shares and absorbs the vibration force generated by the pressure head 141. At the same time, the pressure-reducing component 120 in the movable cylinder shell 113 can follow the pressure head 141 to make a slight shaking, thereby avoiding damage to the pressure head 141 due to long-term vibration and improving its service life.

[0026] like Figure 10As shown, a liquid passage groove 142 is provided on the inner wall of the outer cylinder shell 110. Coolant is connected to the top of the liquid passage groove 142, and a liquid guide pipe 143 is fixedly installed at the other end of the liquid passage groove 142. The liquid guide pipe 143 is fixedly inserted through the tool holder 140, and the outlet end of the liquid guide pipe 143 is aligned with the pressure head 141. During processing, by passing coolant into the liquid passage groove 142, the coolant flows into the liquid guide pipe 143, which can cool the pressure head 141.

[0027] like Figures 3 to 9As shown, a main shaft 212 is rotatably connected to the inner corners of both sides of the bridge-type seat 200. A sector gear 160 is rotatably connected to the main shaft 212. Limiting grooves 162 are formed on the inner walls of both sides of the bottom of the sector gear 160. Two sets of limiting posts 213 are fixedly installed at the inner corners of both sides of the bridge-type seat 200, and the limiting posts 213 are located in the corresponding limiting grooves 162. When the device is damaged due to large forces, the cooperation between the limiting posts 213 and the limiting grooves 162 can prevent the actuator 100 from being blown away. Mounting seats 150 are fixedly installed on both sides of the outer wall of the outer cylinder shell 110. Two sets of fastening grooves 161 are formed on the inner wall of the sector gear 160. A guide groove 163 is formed on the top of the sector gear 160. A fastening plate 16 is slidably connected to the inner wall of the sector gear 160. 4. A guide block 165 is fixedly installed on the top of the fastening plate 164, and the guide block 165 is slidably connected to the inner wall of the guide groove 163. Fastening bolts 166 are engaged at all four corners of the fastening plate 164. The fastening bolts 166 cooperate with the fastening groove 161. The fastening plate 164 is fixedly connected to the sector gear 160 by tightening the fastening bolts 166. By changing the position of the fastening plate 164 on the sector gear 160, the processing angle of the pressure head 141 can be changed. A connecting block 167 is fixedly installed on the end wall of the fastening plate 164, and the connecting block 167 cooperates with the corresponding mounting seat 150. The outer cylinder shell 110 can be installed on the two sets of sector gears 160 through the connecting block 167 and the mounting seat 150. The position of the fastening plate 164 on the sector gear 160 can be adjusted. The angle between the outer cylinder shell 110 and the axis of the sector gear 160 can be changed, thereby changing the machining angle of the pressure head 141 on the crankshaft. An inner groove 210 is provided on the top inner wall of the bridge-type seat 200. A pressure-bearing seat 230 is provided inside the bridge-type seat 200. Side sliding grooves 211 are provided in the middle of both sides of the bridge-type seat 200. The end walls of the pressure-bearing seat 230 are slidably connected to the two sets of side sliding grooves 211 respectively. The side sliding grooves 211 can limit the movement of the pressure-bearing seat 230. Simultaneously, by replacing different replaceable pads 220, the position of the pressure-bearing seat 230 within the side sliding grooves 211 can be changed. Replaceable pads 220 are engaged with the inner wall of the inner groove 210, and the bottom of the replaceable pads 220 is engaged with the top of the pressure-bearing seat 230. The bridge-type seat 200, the replaceable pads 220, and the pressure-bearing seat... The 230 can be fixedly connected by bolts. The distance between the two sets of actuators 100 can be changed according to the thickness of the replaceable pad 220. Racks 231 are fixedly installed on both side walls of the pressure seat 230. Two sets of gears 240 are rotatably connected to the inner walls of both sides of the bridge-type seat 200, and the gears 240 mesh with the corresponding racks 231 and sector gears 160. In this invention, the bridge-type seat 200 is connected to an external machine tool. Then, replaceable pads 220 of different thicknesses are selected according to the type of crankshaft, thereby changing the distance between the pressure seat 230 and the bridge-type seat 200. When the distance changes, the racks 231 mesh with the gears 240, causing the gears 240 to mesh with the sector gears 160, thereby changing the distance between the bottom pressure heads 141 of the two sets of actuators 100.To accommodate different types of crankshafts.

[0028] like Figure 1 and Figure 2 As shown, a rubber sleeve 250 is fixedly installed on the outer wall of the bridge-type seat 200, and the rubber sleeve 250 encloses the actuator 100. The rubber sleeve 250 can protect the internal actuator 100 and prevent dust from entering.

[0029] The working principle of the technical solution provided by this invention is as follows: Connect the bridge seat 200 to an external machine tool. Then, select a replaceable pad 220 of different thicknesses according to the type of crankshaft to change the distance between the pressure seat 230 and the bridge seat 200. When the distance changes, the rack 231 meshes with the gear 240, so that the gear 240 meshes with the sector gear 160, thereby changing the distance between the bottom pressure heads 141 of the two sets of actuators 100 to adapt to different types of crankshafts. Similarly, by adjusting the position of the fastening plate 164 on the sector gear 160, the angle between the outer cylinder shell 110 and the axis of the sector gear 160 can be changed, thereby changing the machining angle of the pressure head 141 on the crankshaft.

[0030] Before processing, high-pressure gas is introduced into the outer cylinder shell 110 through the gas supply pipe 114, which compresses the movable cylinder shell 113 and causes the side wall of the movable cylinder shell 113 to engage with the annular inner groove 112. At this time, the movable cylinder shell 113 drives the T-shaped pusher 116 to move downward, thereby causing the pressure head 141 to press tightly against the crankshaft (spring 117 and spring 219 will undergo initial compression, refer to the instruction manual appendix). Figures 17-18 (The change), thereafter, hydraulic oil is input through the oil supply pipe 118, causing it to push the sealing block 115 downwards, thereby driving the T-shaped push seat 116 to move further downwards, further compressing spring one 117 and spring two 119 (refer to the appendix of the instruction manual). Figures 18-19 (Changes).

[0031] When the crankshaft blank has roundness error or journal size tolerance, radial runout will occur during crankshaft rotation during machining, which can easily cause a sudden change in pressure of the pressure head 141 during machining. At this time, the pressure head 141 can transmit the sudden pressure to spring 119, spring 117 and hydraulic oil, and cause spring 119 and spring 117 to deform. The hydraulic oil absorbs the vibration generated, thereby sharing the impact of the sudden pressure change and avoiding the problem of local overpressure scratches and insufficient underpressure reinforcement in some areas of the crankshaft fillet after machining.

[0032] When burrs appear on the crankshaft blank, during machining, the burrs will squeeze the pressure head 141 during crankshaft rotation, causing the pressure head 141 to vibrate. When the pressure head 141 vibrates, it will drive the tool holder 140 and the clamp 129 to vibrate, thereby driving the internal thread sleeve 130 to vibrate. At this time, the internal thread sleeve 130 can transmit the vibration force to the inner insert 124, causing the inner insert 124 to drive the copper ball 128 to shake. In the form of point contact, it shares and absorbs the vibration force generated by the pressure head 141. At the same time, the pressure-reducing component 120 in the movable cylinder shell 113 can follow the pressure head 141 to make slight shaking, thereby avoiding damage to the pressure head 141 due to long-term vibration and improving its service life.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A rolling head for a crankshaft fillet rolling machine, comprising an actuator (100) and a bridge-type seat (200), wherein two sets of actuators (100) are provided and respectively installed on both sides inside the bridge-type seat (200), characterized in that, The actuator (100) includes an outer shell (110), an inner shell (111) is fixedly installed on the inner wall of the middle part of the outer shell (110), an annular inner groove (112) is opened on the bottom inner wall of the outer shell (110), a movable shell (113) is slidably connected to the bottom inner wall of the outer shell (110), and the outer wall of the movable shell (113) cooperates with the annular inner groove (112). A pressure relief component (120) is installed on the bottom inner wall of the movable shell (113), and the top inner wall of the movable shell (113) is slidably engaged with the bottom outer wall of the inner shell (111).

2. The rolling head for a crankshaft fillet rolling machine according to claim 1, characterized in that, The inner cylinder shell (111) is sealed and slidably connected to the top inner wall with a sealing block (115). A T-shaped push seat (116) is fixedly installed on the middle inner wall of the sealing block (115), and the T-shaped push seat (116) is sealed and slidably connected through the bottom of the inner cylinder shell (111). A spring (117) is sleeved on the outer wall of the T-shaped push seat (116) located inside the inner cylinder shell (111). One end of the spring (117) is fixedly connected to the bottom of the sealing block (115), and the other end is fixedly connected to the bottom inner wall of the inner cylinder shell (111). An air supply pipe (114) is opened on the inner wall of the outer cylinder shell (110), and the air supply pipe (114) is connected to the top of the movable cylinder shell (113). An oil supply pipe (118) is opened on the middle inner wall of the outer cylinder shell (110), and the oil supply pipe (118) is connected to the inside of the inner cylinder shell (111).

3. The rolling head for a crankshaft fillet rolling machine according to claim 2, characterized in that, The pressure relief assembly (120) includes a stop (121), on the top of the stop (121) a second spring (119) is fixedly installed, and the other end of the second spring (119) is fixedly connected to the bottom of the T-shaped push seat (116). The outer wall of the stop (121) is sleeved with a plurality of stacked disc springs (123), and the outer wall of the disc springs (123) is in contact with the inner wall of the movable cylindrical shell (113).

4. The rolling head for a crankshaft fillet rolling machine according to claim 3, characterized in that, The movable cylindrical shell (113) is provided with an inner seat (124). The outer wall of the inner seat (124) is evenly provided with multiple sets of spherical clamping grooves (125). The inner wall of the movable cylindrical shell (113) is evenly provided with multiple sets of spherical clamping grooves (126). The spherical clamping grooves (126) are connected to the corresponding spherical clamping grooves (125). The inner seat (124) is provided with a sliding copper ring (127). The sliding copper ring (127) is located between the inner seat (124) and the movable cylindrical shell (113). The inner wall of the sliding copper ring (127) is engaged with multiple sets of copper balls (128). The copper balls (128) are located between the corresponding spherical clamping grooves (125) and spherical clamping grooves (126).

5. A rolling head for a crankshaft fillet rolling machine according to claim 4, characterized in that, An internally threaded sleeve (130) is inserted into the inner wall of the inner seat (124). A screw head (122) is fixedly installed on the side wall of the stop (121), and the screw head (122) meshes with the internally threaded sleeve (130). A clamp (129) is fixedly installed on the outer wall of the internally threaded sleeve (130). A tool holder (140) is fixedly installed on the clamp (129). A pressure head (141) is inserted into the front end of the tool holder (140), and the pressure head (141) can process the workpiece.

6. A rolling head for a crankshaft fillet rolling machine according to claim 5, characterized in that, The inner wall of the outer shell (110) is provided with a liquid passage groove (142). The top of the liquid passage groove (142) is connected to coolant. The other end of the liquid passage groove (142) is fixedly installed with a liquid guide pipe (143). The liquid guide pipe (143) is fixedly inserted through the knife holder (140), and the outlet end of the liquid guide pipe (143) is aligned with the pressure head (141).

7. A rolling head for a crankshaft fillet rolling machine according to claim 1, characterized in that, A main shaft (212) is rotatably connected to the inner corner of both sides of the bridge-type seat (200). A sector gear (160) is rotatably connected to the main shaft (212). Limiting grooves (162) are opened on the inner walls of both sides of the bottom of the sector gear (160). Two sets of limiting posts (213) are fixedly installed at the inner corner of both sides of the bridge-type seat (200), and the limiting posts (213) are located in the corresponding limiting grooves (162).

8. A rolling head for a crankshaft fillet rolling machine according to claim 7, characterized in that, The outer shell (110) has mounting seats (150) fixedly installed on both sides of its outer wall. The inner wall of the sector gear (160) has two sets of fastening grooves (161). The top of the sector gear (160) has a guide groove (163). The inner wall of the sector gear (160) is slidably connected to a fastening plate (164). The top of the fastening plate (164) is fixedly installed with a guide block (165), and the guide block (165) and the guide groove (163) are connected to each other. 63) The inner wall is slidably connected. There are fastening bolts (166) at the four corners of the fastening plate (164). The fastening bolts (166) are used in conjunction with the fastening groove (161). The fastening plate (164) is fixedly connected to the sector gear (160) by tightening the fastening bolts (166). The end wall of the fastening plate (164) is fixedly installed with a connecting block (167), and the connecting block (167) is used in conjunction with the corresponding mounting seat (150).

9. A rolling head for a crankshaft fillet rolling machine according to claim 7, characterized in that, The bridge-type seat (200) has an inner groove (210) on its top inner wall. The bridge-type seat (200) has a pressure seat (230) inside. The bridge-type seat (200) has side sliding grooves (211) on both sides in the middle. The pressure seat (230) has two side sliding grooves (211) on both sides respectively. The inner wall of the inner groove (210) is fitted with a replaceable pad (220), and the bottom of the replaceable pad (220) is fitted with the top of the pressure seat (230). The bridge-type seat (200), the replaceable pad (220) and the pressure seat (230) can be fixedly connected by bolts. The pressure seat (230) has racks (231) fixedly installed on both sides. The inner walls of both sides of the bridge-type seat (200) are rotatably connected with two sets of gears (240), and the gears (240) mesh with the corresponding racks (231) and sector gears (160).

10. A rolling head for a crankshaft fillet rolling machine according to claim 1, characterized in that, A rubber sleeve (250) is fixedly installed on the outer wall of the bridge-type seat (200), and the rubber sleeve (250) encloses the actuator (100).

Images