A differential housing machining numerical control cutting machine
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANDONG YONGSHENG MASCH CO LTD
- Filing Date
- 2023-09-23
- Publication Date
- 2026-06-19
Smart Images
Figure CN118268892B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of differential housing cutting technology, and in particular to a CNC cutting machine for machining differential housings. Background Technology
[0002] The main machining processes for the differential housing include rough turning of all holes, outer diameter, and end faces; finish turning of all holes, outer diameter, and end faces; machining of the left and right end faces and inner spherical surface of the differential housing using a special machine tool; machining of all holes on the flange using a drilling machine; and finally, deburring, chamfering, and grinding of the overall outer surface. In the outer diameter surface cutting and grinding of the differential housing, the top outer side of the differential housing is fixed by a fixed rod of a robotic arm. The robotic arm drives the fixed rod to bring the differential housing into the cutting chamber, and the fixed rod drives the differential housing to rotate continuously. Simultaneously, the tool holder moves the cutting tool vertically on the outside of the differential housing. Thus, the cutting process of the outer surface of the differential housing is performed through the synchronous action of the rotation of the fixed rod and the vertical extension and retraction of the tool holder.
[0003] During the cutting process, the differential housing is only fixed by a fixing rod at the top, which results in poor stability when the fixing rod drives the differential housing to rotate continuously, affecting the cutting process. Secondly, when the cutting tool is cutting, the lubricating oil is not added to the surface of the cutting tool in time, resulting in a low amount of lubricating oil adhering to the cutting tool, which increases the cutting wear of the cutting tool and affects production efficiency. Summary of the Invention
[0004] This application proposes a CNC cutting machine for machining differential housings, which has the advantages of stabilizing the differential housing and timely lubrication of the tool set, thereby solving the problems mentioned in the background art of differential housing stabilization only at the top and untimely lubrication of the tool set.
[0005] To achieve the above objectives, this application adopts the following technical solution: A CNC cutting machine for machining a differential housing, comprising a robotic arm, wherein the inner side of the robotic arm is provided with a fixing rod for vertically locking and fixing the top end of the differential housing, the top end of the robotic arm extends laterally, and the fixing rod connected to the robotic arm extends vertically, the robotic arm drives the differential housing to rotate after fixing the differential housing through the fixing rod, the differential housing has external holes on both sides, a tool assembly that contacts the differential housing during cutting is provided on one side of the differential housing, a fixing shaft is provided below the differential housing, the top end of which extends into the inner side of the bottom end of the differential housing during cutting is provided, an oiling assembly is provided at the top end of the fixing shaft, and a fixing rod is provided at the top end of the oiling assembly. The differential housing has a fixed cylinder with a hollow inner side. The fixed cylinder has telescopic components arranged at equal angles along its circumference. An elastic component is located on the inner side of the fixed cylinder, and the elastic component is an airbag that elastically fills the inner side of the fixed cylinder. The telescopic component includes a movable plate penetrating the side wall of the fixed cylinder. The movable plate is U-shaped with its opening facing outwards from the fixed cylinder. A rotating roller that rolls along the inner wall of the differential housing is vertically movably connected to the inner side of the opening of the movable plate. The movable plate is pushed against the inner side of the differential housing by the outer side of the elastic component. When the movable plate is pushed against the inner wall of the differential housing by the rotating roller, it compresses the outer side of the elastic component, causing the elastic component to contract.
[0006] Furthermore, the elastic component includes an elastic airbag made of elastic material. The inner side of the elastic airbag is provided with a fixed bracket to fix the shape of the elastic airbag. The shape of the outer side of each roller matches the contour shape of the inner wall of the differential housing, so that the inner wall of the differential housing can abut against the outer side of the roller. The outer side of the roller is provided with a transmission belt, and the roller rotates axially to wind the transmission belt. The oil passing component includes an inner hollow oil passing box. A stopper plate is laterally slidably connected to the inner side of the oil passing box. The bottom end of each transmission belt passes through the bottom end of a moving plate and connects to the top end of the stopper plate inside the oil passing box. The bottom end of the moving plate is provided with a strip hole to facilitate the movement of the transmission belt with the moving plate. The bottom end of the stopper plate is filled with lubricating oil, and the top end of the stopper plate is connected to a pusher spring. The top end of the pusher spring is connected to the top end of the inner side of the oil passing box. The pusher spring elastically pushes the stopper plate close to the bottom end of the oil passing box. The bottom end of the oil passing box is connected to a liquid outlet pipe that allows lubricating oil to flow unidirectionally to the top of the tool assembly.
[0007] Furthermore, the number of movable plates is even, and when the outer side of the rotating roller abuts against the inner wall of the differential housing, the movable plate extends into the inner side of the fixed cylinder. When the outer side of the end of the rotating roller does not abut against the inner wall of the differential housing, the movable plate extends out of the inner side of the fixed cylinder. The vertical height of the movable plate is less than the vertical height of the outer hole. During the rotation of the differential housing, the number of movable plates extending out of the outer hole varies.
[0008] Furthermore, the outer diameter of the oil-passing assembly is smaller than the inner diameter of the differential housing, and the top edge of the moving plate is rounded to facilitate the extension assembly and the oil-passing assembly to extend into the inner side of the differential housing from the bottom end of the differential housing.
[0009] Furthermore, the bottom end of the oil passage box is connected to an inlet pipe that allows lubricating oil to flow into the inside of the oil passage box in one direction, and the end of the inlet pipe away from the oil passage box is connected to a reservoir for storing lubricating oil.
[0010] Furthermore, the fixed cylinder is cylindrical, and the elastic airbag has the same shape as the inner side of the fixed cylinder. The fixed bracket has the same shape as the inner side of the elastic airbag. The fixed bracket is a bracket with both the top and bottom ends being circular rings and connected to the top and bottom circular rings by a vertical support rod.
[0011] Furthermore, a cutting chamber is provided on the outer side of the robotic arm and the differential housing. An inlet / outlet for entering and exiting the differential housing is provided on one side of the cutting chamber. A fixed base box for driving the cutting tool assembly to move vertically for cutting is provided at the bottom of the cutting chamber. A telescopic assembly for driving the cutting tool assembly to move is provided on the inner side of the fixed base box. An air blowing pipe is provided at the top of one of the moving plates located near the cutting tool assembly. The end of the air blowing pipe away from the cutting tool assembly passes through the fixed cylinder and the telescopic assembly and communicates with the inner side of the elastic air bag. The air blowing pipe opens towards the cutting tool assembly.
[0012] Furthermore, the blowing pipe is a one-way blowing pipe, and the outer side of the elastic airbag has a one-way air inlet that penetrates the outer wall of the fixed cylinder, and the inner side of the one-way air inlet is connected to a filter screen for filtering gas.
[0013] The beneficial effect of this invention is that an elastic component is provided on the inner side of the fixed cylinder, which elastically fills the interior of the fixed cylinder. The elastic component elastically pushes the telescopic component arranged circumferentially on the fixed cylinder to extend radially. When the robotic arm drives the differential housing to extend to the outside of the telescopic component, the oil-passing component, the fixed cylinder, and the telescopic component enter the inner side of the differential housing. The elasticity of the elastic component pushes the telescopic component against the inner wall of the differential housing. As a result, when the robotic arm drives the differential housing to rotate, the elastic component elastically pushes the telescopic component against the inner side of the differential housing, thus helping to fix the axial position of the differential housing and making the rotation of the differential housing more stable.
[0014] A drive belt is wound around the outer side of the rotating roller. When the differential housing and the outer side of the rotating roller come into contact, the rotation of the differential housing drives the rotating roller to rotate, causing the drive belt to continue winding around the outer side of the roller. This causes the bottom end of the drive belt to pull the plug plate inside the oil box upwards, allowing lubricating oil to be replenished to the inside of the oil box from the reservoir through the inlet pipe in the area below the plug plate. When the inner side of the differential housing no longer comes into contact with the outer side of the rotating roller, the rotating roller loses the force of the inner side of the differential housing and extends outwards relative to the fixed cylinder. At the same time, the push spring inside the oil box pushes the plug plate downwards again, causing the plug plate to pull the drive belt. This causes the outer side of the rotating roller to rotate in the opposite direction momentarily, releasing the wound drive belt. This allows the lubricating oil below the plug plate to be pushed through the outlet pipe and squeezed out to the outside of the tool assembly. Thus, through the continuous rotation of the differential housing, the tool assembly is lubricated in a timely manner. When the differential housing stops cutting, the squeezing of lubricating oil into the tool assembly is stopped in time, reducing the waste of lubricating oil. Attached Figure Description
[0015] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.
[0016] This application can be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein:
[0017] Figure 1 This is a three-dimensional schematic diagram of the structure of the present invention;
[0018] Figure 2 This is a schematic diagram of the differential housing structure and the tool assembly structure of the present invention;
[0019] Figure 3 This is a schematic diagram of the inner side of the differential housing structure of the present invention;
[0020] Figure 4 This is a cross-sectional schematic diagram of the differential housing structure of the present invention;
[0021] Figure 5 This is a schematic diagram showing the rotational state of the differential housing structure relative to the fixed cylinder structure of the present invention;
[0022] Figure 6 This is a schematic diagram of the rotational state of the differential housing structure relative to the oil passage component structure of the present invention;
[0023] Figure 7 This is a schematic diagram of the elastic component structure of the present invention.
[0024] In the diagram: 1. Robotic arm; 2. Differential housing; 3. Outer hole; 4. Fixed shaft; 5. Tool assembly; 6. Oil conveying assembly; 61. Oil conveying box; 62. Plug plate; 63. Push spring; 64. Liquid outlet pipe; 65. Liquid inlet pipe; 7. Fixed cylinder; 8. Telescopic assembly; 81. Moving plate; 82. Rotary roller; 83. Drive belt; 9. Elastic assembly; 91. Elastic airbag; 92. Fixed bracket; 10. Air blowing pipe; 11. Cutting chamber; 12. Inlet / outlet; 13. Fixed base box; 14. Liquid storage box. Implementation
[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Example
[0026] Please see Figure 1 A CNC cutting machine for machining a differential housing includes a robotic arm 1. The inner side of the robotic arm 1 has a vertically positioned fixing rod that secures the top of the differential housing 2. The top portion of the robotic arm 1 extends laterally, and the fixing rod connected to the robotic arm 1 extends vertically. After fixing the differential housing 2 via the fixing rod, the robotic arm 1 drives the differential housing 2 to rotate. The robotic arm 1 can extend and retract laterally and vertically respectively. (Reference) Figure 2 The differential housing 2 has external holes 3 on both sides. A tool assembly 5, which contacts the differential housing 2 during cutting, is located on one side of the differential housing 2. A fixed shaft 4, whose tip extends into the inner side of the bottom of the differential housing 2 during cutting, is located at the bottom of the differential housing 2. (See reference) Figure 3 The top of the fixed shaft 4 is provided with an oil passage component 6, and the top of the oil passage component 6 is provided with a fixed cylinder 7. The inner side of the fixed cylinder 7 is hollow, and the fixed cylinder 7 is provided with telescopic components 8 at equal angles around its circumference. (Refer to...) Figure 4 An elastic component 9 is provided on the inner side of the fixed cylinder 7. The elastic component 9 is an airbag that elastically fills the inner side of the fixed cylinder 7.
[0027] Please see Figure 3 The telescopic assembly 8 includes a movable plate 81 that penetrates the side wall of the fixed cylinder 7. The hole in the side wall of the fixed cylinder 7 fixes the radial extension path of the movable plate 81 relative to the fixed cylinder 7 and keeps the movable plate 81 in a vertical state. The movable plate 81 is in the shape of a "U" with its opening facing the outside of the fixed cylinder 7. The inner side of the opening of the movable plate 81 is vertically movably connected to a roller 82 that rolls along the inner wall of the differential housing 2. The movable plate 81 is pushed against the inner side of the differential housing 2 by the outer side of the elastic assembly 9.
[0028] Please see Figure 5The movable plates 81 are distributed at equal angles around the inner side of the differential housing 2. When the movable plates 81 abut against the inner wall of the differential housing 2 through the rotating roller 82, the movable plates 81 will compress the outer side of the elastic component 9, causing the elastic component 9 to contract.
[0029] In use, the differential housing 2 is moved by the robotic arm 1 to the outside of the oiling assembly 6, the fixed cylinder 7 and the telescopic assembly 8, so that the oiling assembly 6, the fixed cylinder 7 and the telescopic assembly 8 enter the interior of the differential housing 2, so that the outer side of the rotating roller 82, which is not located in the circumferential position of the outer hole 3, abuts against the inner wall of the differential housing 2, so that multiple rotating rollers 82 fix the axis position of the differential housing 2 on the inner side of the differential housing 2, making the cutting of the outer side of the differential housing 2 by the tool assembly 5 more stable. Example
[0030] Example 2 is based on Example 1; please refer to Example 1. Figure 7 The elastic component 9 includes an elastic airbag 91 made of elastic material, and a fixing bracket 92 for fixing the shape of the elastic airbag 91 is provided on the inner side of the elastic airbag 91. (Refer to...) Figure 3 and Figure 4 The outer shape of each roller 82 matches the contour of the inner wall of the differential housing 2, facilitating the inner wall of the differential housing 2 to abut against the outer side of the roller 82. A drive belt 83 is provided on the outer side of the roller 82, and the roller 82 rotates axially to wind around the drive belt 83. The outer side of the roller 82 is fixedly connected to the end of the drive belt 83 near the roller 82. The oil-passing assembly 6 includes an inner hollow oil-passing box 61. A stopper plate 62 is laterally slidably connected to the inner side of the oil-passing box 61. The outer circumferential side of the stopper plate 62 slides and seals against the inner wall of the oil-passing box 61. Each drive belt 83... The bottom end of the moving plate 81 passes through the bottom end of the moving plate 81 and connects to the top end of the plug plate 62 inside the oil box 61. The bottom end of the moving plate 81 is provided with a strip hole to facilitate the movement of the transmission belt 83 following the moving plate 81. The bottom end of the plug plate 62 is filled with lubricating oil, and the top end of the plug plate 62 is connected to a push spring 63. The top end of the push spring 63 is connected to the top end inside the oil box 61. The push spring 63 elastically pushes the plug plate 62 close to the bottom end of the oil box 61. The bottom end of the oil box 61 is connected to a liquid outlet pipe 64 that unidirectionally discharges lubricating oil to the top end of the tool assembly 5.
[0031] Please see Figure 4 , Figure 5 and Figure 6The number of movable plates 81 is even. When the outer side of the rotating roller 82 abuts against the inner wall of the differential housing 2, the movable plate 81 extends into the inner side of the fixed cylinder 7. When the outer side of the end of the rotating roller 82 does not abut against the inner wall of the differential housing 2, the movable plate 81 extends out of the inner side of the fixed cylinder 7. The vertical height of the movable plate 81 is less than the vertical height of the outer hole 3. During the rotation of the differential housing 2, the number of movable plates 81 extending out of the outer hole 3 is different. The number of movable plates 81 is set so that the rotating roller 82 can be symmetrically fixed in the radial direction to the inner side of the differential housing 2, making the differential housing 2 more stable.
[0032] Please see Figure 6 The outer diameter of the oil-passing assembly 6 is smaller than the inner diameter of the differential housing 2. The top edge of the moving plate 81 is rounded to facilitate the extension assembly 8 and the oil-passing assembly 6 to extend from the bottom of the differential housing 2 into the inner side of the differential housing 2. The mechanical arm 1 extends and retracts to move the differential housing 2 toward the oil-passing assembly 6. During the process of the oil-passing assembly 6, the fixed cylinder 7 and the extension assembly 8 entering the inner side of the differential housing 2 from the bottom, the moving plate 81 and the rotating roller 82 will first abut against the bottom of the inner wall of the differential housing 2, causing each extension assembly 8 to be compressed toward the inner side of the fixed cylinder 7, and then enter the middle of the differential housing 2, causing the extension assembly 8 to extend out of the inner side of the fixed cylinder 7 again. The extension and retraction of the extension assembly 8 toward the inner side of the fixed cylinder 7 is the process of the extension assembly 8 entering the inner side of the differential housing 2 and fixing the axis of the differential housing 2.
[0033] Please see Figure 1 and Figure 4 The bottom end of the oil passage box 61 is connected to an inlet pipe 65 that allows lubricating oil to flow into the inside of the oil passage box 61 in one direction. The end of the inlet pipe 65 away from the oil passage box 61 is connected to a reservoir box 14 for storing lubricating oil. The inside of the reservoir box 14 has an elastic element that compresses the lubricating oil. The elasticity helps the lubricating oil overcome the oil delivery resistance caused by the vertical height when the oil flows from the inside of the reservoir box 14 to the inside of the oil passage assembly 6. Even if the plug plate 62 moves upward to replenish the lubricating oil to the inside of the oil passage box 61 through the inlet pipe 65, the elastic element will not affect the vertical sliding process of the plug plate 62 inside the oil passage box 61.
[0034] Please see Figure 4 and Figure 7The fixed cylinder 7 is cylindrical, and the elastic airbag 91 has the same shape as the inner side of the fixed cylinder 7. The fixed bracket 92 has the same shape as the inner side of the elastic airbag 91. The fixed bracket 92 is a bracket with both top and bottom rings connected by a vertical support rod. The shape of the fixed cylinder 7 better fits the inner side of the differential housing 2. The overall shape of the fixed cylinder 7 and the elastic component 9 helps to better stabilize the differential housing 2. At the same time, the shape of the fixed bracket 92 ensures that the elastic airbag 91 always remains cylindrical, which is beneficial to the movement of the plate. When 81 extends into the fixed cylinder 7 to radially compress the elastic airbag 91, the elasticity of the elastic airbag 91 and the fixed shape of the fixed bracket 92 facilitate the elastic airbag 91 to elastically push the moving plate 81 against the inner wall of the differential housing 2. At the same time, the roller 82 releases the transmission belt 83, and the transmission belt 83 releases the plug plate 62, causing the plug plate 62 to squeeze the oil below to lubricate the tool assembly 5. After the plug plate 62 moves downward, it will be pulled upward again by the transmission belt 83, and lubricating oil will be replenished to the inside of the oil box 61 again.
[0035] Please see Figure 5 and Figure 6 The roller 82, which is pressed against the inner wall of the differential housing 2, rotates and wraps around the outer drive belt 83. This causes the bottom end of the drive belt 83 to pull the plug plate 62 upward, allowing the plug plate 62 to draw in lubricating oil through the inlet pipe 65 into the inner side of the oil box 61. When the differential housing 2 drives the outer hole 3 to reach the circumference of the roller 82, the roller 82 will instantly lose the force pressed against the inner wall of the differential housing 2 and extend out of the outer side of the differential housing 2 through the outer hole 3. Since the top of the plug plate 62 is connected to the push spring 63, the elasticity of the push spring 63 pushes the plug plate 62 downward again. At the same time, the elasticity of the push spring 63 causes the roller 82 to instantly release the wound drive belt 83, thereby causing the lubricating oil below the plug plate 62 to be squeezed out through the outlet pipe 64 to the outside of the tool assembly 5. Therefore, the tool assembly 5 is lubricated through the continuous rotation of the differential housing 2.
[0036] During the rotation of the differential housing 2, the differential housing 2 moves relative to the fixed cylinder 7 from... Figure 5 Turn to Figure 6 The state is such that some of the rollers 82 are in a rotating state, and some of the rollers 82 are in a state of releasing the drive belt 83, and are in a state of... Figure 5 In the state where the two rollers 82 are located at the edge of the outer hole 3, one roller 82 is in the state of about to release the drive belt 83, and the other is in the state of about to begin winding the roller 82. Therefore, as the differential housing 2 continues to rotate, it is in the state of... Figure 6In this state, the roller 82 that is about to release the transmission belt 83 releases the transmission belt 83, while another roller 82 that is about to start winding the transmission belt 83 winds a portion of the transmission belt 83. The difference between the amount by which one roller 82 completely releases the transmission belt 83 and the amount by which one roller 82 winds the transmission belt 83 is the amount by which the stop plate 62 will move downward inside the oil box 61, thereby achieving the process of the stop plate 62 compressing the lubricating oil below to lubricate the tool assembly 5. Example
[0037] Example 3 is based on Example 2; please refer to Example 2. Figure 1 A cutting chamber 11 is provided on the outer side of the robotic arm 1 and the differential housing 2. An inlet / outlet 12 for entering and exiting the differential housing 2 is provided on one side of the cutting chamber 11. A fixed base box 13 for vertically moving the drive tool assembly 5 for cutting is provided at the bottom of the cutting chamber 11. An extension assembly for moving the drive tool assembly 5 is located inside the fixed base box 13. After the robotic arm 1 extends laterally out of the inlet / outlet 12 to fix the differential housing 2, it drives the differential housing 2 into the inner side of the cutting chamber 11 to perform the outer surface cutting process. (Refer to...) Figure 3 and Figure 4 A blowing pipe 10 is provided at the top of a movable plate 81 located near the tool assembly 5. The end of the blowing pipe 10 away from the tool assembly 5 passes through the fixed cylinder 7 and the telescopic assembly 8 and communicates with the inner side of the elastic assembly 9. The blowing pipe 10 opens towards the tool assembly 5. During the cutting process of the differential housing 2, when the elastic air bladder 91 is in a compressed state, the gas inside the elastic air bladder 91 is blown towards the tool assembly 5 through the blowing pipe 10. When the outer side of the blowing pipe 10 is covered by the inner wall of the differential housing 2, the gas blown out by the blowing pipe 10 will blow and clean the inner wall of the differential housing 2, reducing the wear when the inner wall of the differential housing 2 contacts the roller 82, better protecting the roller 82, and reducing the operating cost of the roller 82.
[0038] Please see Figure 3 and Figure 7 The air blowing pipe 10 is a one-way air blowing pipe, and the outer side of the elastic air bag 91 has a one-way air inlet that penetrates the outer wall of the fixed cylinder 7. The inner side of the one-way air inlet is connected to a filter screen for filtering gas. When the outer hole 3 on the outer side of the differential housing 2 faces the tool assembly 5, the drive robot arm 1 drives the differential housing 2 to move towards the oil passing assembly 6. During the process of the oil passing assembly 6, the fixed cylinder 7 and the telescopic assembly 8 entering the inner side of the differential housing 2 from the bottom end of the differential housing 2, the moving plate 81 and the rotating roller 82 will first abut against the bottom end of the inner wall of the differential housing 2, causing each telescopic assembly 8 to be compressed into the inner side of the fixed cylinder 7 as a whole, and then enter the middle of the differential housing 2, causing the telescopic assembly 8 to extend out of the inner side of the fixed cylinder 7 again. The gas compressed by the telescopic assembly 8 into the elastic component 9 inside the fixed cylinder 7 is directly blown to the outer side of the tool assembly 5 through the air blowing pipe 10, and the tool assembly 5 is cleaned before cutting.
[0039] Please see Figure 5 and Figure 6 As the differential housing 2 rotates relative to the fixed cylinder 7, the number of rollers 82 that the inner wall of the differential housing 2 abuts against is different at different times. Therefore, the amount of compression of the elastic air bladder 91 is different at different times, and the cleaning process of the surface of the tool assembly 5 is carried out by the expansion of the compressed elastic air bladder 91.
[0040] The method of using (working principle) of this invention is as follows:
[0041] The robotic arm 1 extends laterally through the inlet / outlet 12 to fix the differential housing 2 and bring it into the inner side of the cutting chamber 11. Then, the robotic arm 1 is positioned at the top of the fixed shaft 4 and extends vertically to allow the oiling assembly 6, the fixed cylinder 7, and the telescopic assembly 8 to enter the inner side of the differential housing 2 from the bottom end. The telescopic assembly 8 is elastically pushed against the inner wall of the differential housing 2 by the elastic assembly 9. The telescopic assembly 8 then wraps around the robotic arm 1 to fix the axis position of the differential housing 2. At the same time, after the tool assembly 5 is brought close to the outer side of the differential housing 2, the robotic arm 1 drives the differential housing 2 to rotate and causes the tool assembly 5 to extend and retract vertically, together cutting the outer surface of the differential housing 2.
[0042] When the differential housing 2 rotates, it rotates relative to the fixed cylinder 7 and the telescopic assembly 8. This causes the outer hole 3 on the outer surface of the differential housing 2 to pass over the outside of the rotating roller 82. As a result, the rotating roller 82 loses the force resisted by the inner wall of the differential housing 2. The rotating roller 82 is then elastically pushed out of the outer side of the fixed cylinder 7 by the side of the elastic air bladder 91 inside the fixed cylinder 7, increasing the volume of the elastic air bladder 91 and thus increasing the amount of gas inside. As the differential housing 2 continues to rotate, the rotating roller 82 moves relative to the outer hole 3 and moves to the surface of the outer hole 3. This means that the side wall of the differential housing 2 contacts the outside of the rotating roller 82 again, causing the rotating roller 82 to be pressed against the side wall of the differential housing 2. The rotating roller 82 then extends back into the inner side of the fixed cylinder 7, compressing the elastic air bladder 91 and reducing the amount of gas inside the elastic air bladder 91. The reduced gas is then blown out through the air pipe 10 toward the outside of the tool assembly 5, thereby cleaning the vertically telescopic tool assembly 5 and reducing wear during the cutting process.
[0043] As the differential housing 2 rotates, driven by the robotic arm 1, the side of the stationary roller 82 is pressed against the inner wall of the differential housing 2. The differential housing 2 then rotates, causing the inner wall to rotate the roller 82 relative to the moving plate 81. This allows the outer side of the roller 82 to continue winding the transmission belt 83, pulling the bottom end of the transmission belt 83 upwards on the inner side of the oil box 61. Lubricating oil is then drawn into the inner side of the oil box 61 through the inlet pipe 65. When the side wall of the differential housing 2 leaves the outer side of the roller 82, the roller 82 releases the transmission belt 83 again, causing the plug plate 62 to be elastically pushed by the hydraulic spring 63, thus allowing the transmission belt 82 to continue winding. The stopper plate 62 is released instantly by the 83, causing the stopper plate 62 to push the lubricating oil below through the outlet pipe 64 to squeeze the lubricating oil to the outside of the tool assembly 5. During the cutting process of the differential housing 2, the tool assembly 5 is lubricated in real time by the lubricating oil squeezed out by the outlet pipe 64, reducing wear. When one differential housing 2 is cut, the robotic arm 1 stops rotating, the tool assembly 5 moves away from the outside of the differential housing 2, the robotic arm 1 extends laterally out of the inlet / outlet 12 and releases the cut differential housing 2, and fixes the uncut differential housing 2 again to enter the inside of the cutting chamber 11 through the inlet / outlet 12.
Claims
1. A CNC cutting machine for machining a differential housing, comprising a robotic arm (1), wherein the inner side of the robotic arm (1) is provided with a fixing rod for vertically locking and fixing the top end of the differential housing (2), the top end of the robotic arm (1) extends laterally, and the fixing rod connected to the robotic arm (1) extends vertically, the robotic arm (1) drives the differential housing (2) to rotate after fixing the differential housing (2) through the fixing rod, the differential housing (2) is provided with external holes (3) on both sides, and a tool assembly (5) is provided on one side of the differential housing (2) for contact during cutting, characterized in that, The differential housing (2) is provided with a fixed shaft (4) at the bottom, which extends into the inner side of the bottom of the differential housing (2) when cutting. The fixed shaft (4) is provided with an oil passage assembly (6) at the top. The oil passage assembly (6) is provided with a fixed cylinder (7) at the top. The inner side of the fixed cylinder (7) is hollow. The fixed cylinder (7) is provided with telescopic components (8) at equal angles in the circumference. The inner side of the fixed cylinder (7) is provided with an elastic component (9). The elastic component (9) is an airbag that elastically fills the inner side of the fixed cylinder (7). The telescopic assembly (8) includes a movable plate (81) that penetrates the side wall of the fixed cylinder (7). The movable plate (81) is in the shape of a "U" with its opening facing the outside of the fixed cylinder (7). The inner side of the opening of the movable plate (81) is vertically connected to a rotating roller (82) that rolls along the inner wall of the differential housing (2). The movable plate (81) is pushed against the inner side of the differential housing (2) by the outer side of the elastic assembly (9). The moving plates (81) are evenly distributed circumferentially on the inner side of the differential housing (2). When the moving plates (81) abut against the inner wall of the differential housing (2) through the rotating roller (82), the moving plates (81) will compress the outer side of the elastic component (9), causing the elastic component (9) to contract. The elastic component (9) includes an elastic airbag (91) made of elastic material. The inner side of the elastic airbag (91) is provided with a fixing bracket (92) to fix the shape of the elastic airbag (91). The outer shape of each roller (82) matches the contour shape of the inner wall of the differential housing (2), so that the inner wall of the differential housing (2) can abut against the outer side of the roller (82). The outer side of the roller (82) is provided with a transmission belt (83), and the roller (82) rotates axially to wind the transmission belt (83). The oil passing component (6) includes an inner hollow oil passing box (61). The inner side of the oil passing box (61) is laterally slidably connected with a plug plate (62). Each transmission belt (82) 3) The bottom end of the moving plate (81) is connected to the top end of the plug plate (62) through the bottom end of the oil box (61). The bottom end of the moving plate (81) is provided with a strip hole to facilitate the movement of the transmission belt (83) following the moving plate (81). The bottom end of the plug plate (62) is filled with lubricating oil. The top end of the plug plate (62) is connected to a push spring (63). The top end of the push spring (63) is connected to the top end of the inner side of the oil box (61). The push spring (63) elastically pushes the plug plate (62) close to the bottom end of the oil box (61). The bottom end of the oil box (61) is connected to a liquid outlet pipe (64) that unidirectionally discharges lubricating oil to the top end of the tool assembly (5).
2. A differential case machining CNC cutting machine according to claim 1, characterized in that, The number of movable plates (81) is even. When the outer side of the rotating roller (82) abuts against the inner wall of the differential housing (2), the movable plate (81) extends into the inner side of the fixed cylinder (7). When the outer side of the end of the rotating roller (82) does not abut against the inner wall of the differential housing (2), the movable plate (81) extends out of the inner side of the fixed cylinder (7). The vertical height of the movable plate (81) is less than the vertical height of the outer hole (3). During the rotation of the differential housing (2), the number of movable plates (81) extending out of the outer hole (3) is different.
3. A differential case machining computer numerically controlled cutting machine as defined in claim 1, wherein, The outer diameter of the oil-passing assembly (6) is smaller than the inner diameter of the differential housing (2). The top edge of the moving plate (81) is rounded to facilitate the extension assembly (8) and the oil-passing assembly (6) to extend from the bottom of the differential housing (2) into the inside of the differential housing (2).
4. The differential case machining computer numerically controlled cutting machine of claim 1, wherein, The bottom end of the oil passage box (61) is connected to a liquid inlet pipe (65) that allows lubricating oil to flow into the inside of the oil passage box (61) in one direction. The end of the liquid inlet pipe (65) away from the oil passage box (61) is connected to a liquid storage box (14) for storing lubricating oil.
5. A differential case machining computer numerically controlled cutting machine as defined in claim 1, wherein, The fixed cylinder (7) is cylindrical, and the elastic airbag (91) has the same shape as the inner side of the fixed cylinder (7). The fixed bracket (92) has the same shape as the inner side of the elastic airbag (91). The fixed bracket (92) is a bracket with both the top and bottom ends being circular rings and connected to the top and bottom circular rings by a vertical support rod.
6. A differential case machining computer numerically controlled cutting machine as defined in claim 1, wherein, The robotic arm (1) and the differential housing (2) are provided with a cutting chamber (11) on the outside. The cutting chamber (11) is provided with an inlet / outlet (12) for entering and exiting the differential housing (2) on one side. The bottom of the cutting chamber (11) is provided with a fixed base box (13) for driving the cutting tool assembly (5) to move vertically for cutting. The fixed base box (13) is provided with a telescopic assembly for driving the cutting tool assembly (5) to move on the inside side. The top of a moving plate (81) located near the cutting tool assembly (5) is provided with an air pipe (10). The end of the air pipe (10) away from the cutting tool assembly (5) passes through the fixed cylinder (7) and the telescopic assembly (8) and communicates with the inside of the elastic airbag (91). The air pipe (10) opens towards the cutting tool assembly (5).
7. A differential case machining CNC cutting machine according to claim 6, characterized in that, The blowing pipe (10) is a one-way blowing pipe, and the outer side of the elastic airbag (91) has a one-way air inlet that penetrates the outer wall of the fixed cylinder (7), and the inner side of the one-way air inlet is connected to a filter screen for filtering gas.