Automatic deburring device for worm shaft

Abstract

The worm shaft automatic deburring device comprises a conveying mechanism, a grinding mechanism and a clamping and positioning mechanism, the grinding mechanism is provided with a grinding wheel, the clamping and positioning mechanism is provided with two positioning plates and an ejector pin, and V-shaped grooves are formed in the opposite ends of the two positioning plates; the clamping and positioning mechanism is further provided with a positioning driving assembly and a rotating driving assembly linked with the ejector pin, the end of the worm shaft is pre-positioned and clamped through a positioning plate, and the initial position precision of a workpiece is ensured; meanwhile, the ejector pin mechanism is coaxially connected with the end face of the worm shaft in an abutting mode, a stable axial reference is provided for machining, then the positioning plate can move in the ejector pin direction and actively disengage from the end of the worm shaft, and therefore the surface of the workpiece is completely exposed, and the grinding wheel can conduct dead-corner-free full-surface treatment on the worm shaft; the problem that a traditional deburring machine cannot grind a clamping part due to fixed clamping is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of worm shaft processing equipment, and more particularly to an automatic deburring device for worm shafts. Background Art

[0002] As a key component widely used in the field of mechanical transmission, the processing quality of worm shafts directly affects the performance and reliability of the transmission system. During the machining process of worm shafts, the generation of burrs is a common technological problem. These burrs not only affect the appearance quality of worm shafts and reduce the overall quality of products, but more importantly, they can lead to a decrease in transmission efficiency, generate abnormal noises, and even accelerate the wear of the transmission system and shorten the service life of the equipment. Therefore, the deburring process is an essential and indispensable link in the processing of worm shafts.

[0003] Currently, there are mainly two methods for deburring worm shafts: traditional manual deburring and mechanical automation deburring. Manual deburring is usually carried out by operators using tools such as files and sandpapers to manually remove burrs. Although this method has a low equipment investment cost, it has many limitations: firstly, manual operation is inefficient and difficult to meet the requirements of mass production; secondly, the deburring quality is unstable and prone to surface damage of workpieces; thirdly, the labor cost is high and there are safety hazards. In contrast, using a dedicated deburring machine for automated processing has obvious advantages: high deburring efficiency, stable and reliable quality, significantly reducing labor costs, and being easy to achieve standardized production.

[0004] Chinese Patent Application for Invention (Publication No. CN106826443A) discloses an automatic deburring machine for worm shafts, the structure of which includes a machine frame, on which a loading mechanism, a feeding belt, a clamping mechanism, and a grinding wheel polishing mechanism are respectively arranged. The grinding wheel polishing mechanism includes a second mounting seat, a lifting column, a connecting rod assembly, an adjusting rod assembly, a second motor, and a grinding wheel driving motor. The connecting rod assembly and the adjusting rod assembly are respectively hinged between the second mounting seat and the lifting column. The second motor is fixed on the machine frame. A connecting plate is arranged on the lifting column, and a transmission block is arranged on the connecting plate. The output end of the second motor is in transmission connection with the transmission block through a lead screw. The grinding wheel driving motor is installed on the second mounting seat, and a grinding wheel is arranged at the output end of the grinding wheel driving motor.

[0005] The deburring machine uses a radial clamping mechanism to fix the worm shaft, applies radial pressure through the clamping device to maintain the stability of the workpiece, and then uses a grinding tool to precisely process the surface of the worm shaft. However, this clamping method has obvious limitations: since the contact area between the clamping mechanism and the worm shaft cannot be processed during the grinding process, burrs remain in these areas or the surface roughness does not meet the standard, thus affecting the overall grinding effect and consistency of the worm shaft. This uneven treatment not only reduces the surface quality of the product, but may also have an adverse effect on subsequent assembly and performance. Summary of the invention

[0006] In view of the problems existing in the prior art, an automatic deburring device for a worm shaft is provided, in which the end of the worm shaft is pre-positioned and clamped by a positioning plate to ensure the initial position accuracy of the workpiece; at the same time, the ejector mechanism and the end face of the worm shaft are coaxially abutted to provide a stable axial reference for processing, and then the positioning plate will move toward the ejector direction and actively disengage from the end of the worm shaft, thereby completely exposing the surface of the workpiece, so that the grinding wheel can perform full surface treatment on the worm shaft without dead angles, solving the problem that traditional deburring machines cannot grind the clamping part due to fixed clamping.

[0007] To solve the problems of the prior art, the present invention provides an automatic deburring device for a worm shaft, comprising a conveying mechanism and a grinding mechanism, the grinding mechanism having a grinding wheel that can move along the length direction of the worm shaft, the deburring device also comprising a clamping and positioning mechanism arranged on both sides of the conveying mechanism, the clamping and positioning mechanism having two positioning plates that can position and clamp the end of the worm shaft in a vertical direction and a pin that can coaxially abut against the end face of the worm shaft, the positioning plate moves toward the pin after the pin and the worm shaft are coaxially abutted to separate from the end of the worm shaft, V-shaped grooves are arranged at opposite ends of the two positioning plates, the clamping and positioning mechanism is also provided with a positioning drive assembly linked to the pin and the positioning plate, and a rotation drive assembly linked to the pin, the positioning drive assembly is used to drive the pin to abut against the end face of the worm shaft and drive the positioning plate to clamp the end of the worm shaft, and the rotation drive assembly is used to drive the pin to drive the worm shaft to rotate synchronously when it abuts against the worm shaft.

[0008] Preferably, the positioning drive assembly includes a drive seat capable of moving along the width direction of the conveying mechanism, the drive seat is connected to the ejector in reverse transmission, and two drive arms capable of moving vertically and extending laterally are provided on the drive seat, the two drive arms are respectively fixedly connected to the two positioning plates, and when the drive seat moves in a direction away from the worm shaft, the two drive arms respectively drive the two positioning plates to clamp the end of the worm shaft and then disengage from the end of the worm shaft.

[0009] Preferably, the two driving and clamping positioning mechanisms further include a frame disposed on the side of the conveying mechanism. A positioning frame is provided in the frame. An elastic reset element is disposed between the two driving arms. The opposite sides of the two driving arms are sequentially provided with a first horizontal section, an inclined section, and a second horizontal section. The opposite sides of the two driving arms abut against the inner side of the positioning frame.

[0010] Preferably, an elastic connecting element is disposed between the driving arm and the positioning plate.

[0011] Preferably, the positioning driving assembly further includes a driving rod and a linear push cylinder. The driving rod passes through the driving seat and is rotatably connected thereto. The linear push cylinder is disposed on the frame and its output rod is connected to the driving rod. A reverse transmission is provided in the positioning frame. The reverse transmission is drivingly connected to the driving rod and the thimble. When the driving rod drives the driving seat to move away from the worm shaft, the thimble coaxially abuts against the end face of the worm shaft.

[0012] Preferably, the reverse driver has an inner cavity and an outer cavity coaxial therewith. A communication hole is provided between the inner cavity and the outer cavity. A plug column is disposed in the inner cavity. The driving rod passes through the reverse driver and is connected to the plug column. A plug cylinder connected to the thimble is disposed in the outer cavity; when the plug column moves laterally, the plug cylinder moves in a direction opposite to the piston.

[0013] Preferably, a connecting seat slidably connected thereto is disposed at one end of the plug cylinder facing the worm shaft. The thimble is connected to the connecting seat. An elastic buffer element is disposed between the thimble and the plug cylinder.

[0014] Preferably, an internal threaded hole is provided at one end of the connecting seat facing the thimble. A threaded column threadedly connected to the internal threaded hole is provided at one end of the thimble facing the connecting seat.

[0015] Preferably, a transverse plate is provided on the positioning plate. A threaded rod extending in the vertical direction is provided on the transverse plate. The threaded rod passes through the driving arm and is slidably engaged therewith. An adjusting nut abutting against the driving arm is provided on the threaded column.

[0016] The beneficial effects of the present application compared with the prior art are as follows: In the clamping and positioning mechanism of the present application, the positioning plate pre-positions and clamps the end of the worm shaft to ensure the initial position accuracy of the workpiece; subsequently, the thimble mechanism achieves precise coaxial abutment with the end face of the worm shaft, providing a stable axial reference for subsequent processing. Then, in the state where the driving rod continues to move away from the worm shaft, the positioning plate will move axially towards the thimble, and the positioning plate actively disengages from the end of the worm shaft, thereby completely exposing the surface of the workpiece, enabling the grinding wheel to perform a full-surface treatment of the worm shaft without dead angles.

[0017] This design has multiple advantages: Firstly, through dynamic separable clamping, the problem of grinding blind spots caused by traditional fixed clamping methods is completely solved, achieving complete machining of the surface of the worm shaft; Secondly, the coordinated action of the positioning plate and the center pin ensures the stability and precision of the workpiece during machining, avoiding machining errors caused by changes in clamping force; Thirdly, this mechanism can adapt to worm shafts of different sizes and shapes, with high versatility and flexibility. Brief Description of the Drawings

[0018] Figure 1 is a perspective view of an automatic deburring device for a worm shaft of the present invention.

[0019] Figure 2 is a perspective sectional view of an automatic deburring device for a worm shaft of the present invention.

[0020] Figure 3 is a schematic diagram of the open state of two positioning plates in an automatic deburring device for a worm shaft of the present invention.

[0021] Figure 4 is a schematic diagram of two positioning plates when clamping a worm shaft in an automatic deburring device for a worm shaft of the present invention.

[0022] Figure 5 is a schematic diagram of two positioning plates when disengaging from a worm shaft in an automatic deburring device for a worm shaft of the present invention.

[0023] Figure 6 is a sectional view of an automatic deburring device for a worm shaft of the present invention.

[0024] Figure 7 is Figure 6 a partial enlarged view of part A of

[0025] Figure 8 is Figure 6 a partial enlarged view of part B of

[0026] Figure 9 is a perspective view of the clamping and positioning mechanism in an automatic deburring device for a worm shaft of the present invention.

[0027] Figure 10 is a perspective view of the positioning plate in an automatic deburring device for a worm shaft of the present invention.

[0028] Figure 11 is a perspective view of the driving arm in an automatic deburring device for a worm shaft of the present invention.

[0029] Figure 12 is a perspective view of the driving arm and the driving rod in an automatic deburring device for a worm shaft of the present invention.

[0030] The reference numerals in the figure are: 1, conveying mechanism; 2, grinding mechanism; 21, grinding wheel; 3, clamping and positioning mechanism; 31, positioning plate; 311, horizontal plate; 312, threaded rod; 313, adjusting nut; 32, ejector pin; 321, threaded column; 33, frame; 34, positioning frame; 4, positioning drive assembly; 41, drive seat; 42, drive arm; 421, first horizontal section; 422, inclined section; 423, second horizontal section; 43, elastic reset element; 44, elastic connection element; 45, drive rod; 46, linear push cylinder; 47, reverse transmission; 471, inner pressure chamber; 472, outer pressure chamber; 473, communication hole; 474, plug column; 475, plug cylinder; 476, connection seat; 48, elastic buffer element; 5, rotation drive assembly; 51, driven gear; 52, driving gear; 53, drive motor. Detailed implementation mode

[0031] In order to further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific implementation modes.

[0032] As Figures 1 - 5 shown, a worm shaft automatic deburring device includes a conveying mechanism 1 and a grinding mechanism 2. The conveying mechanism 1 is used to convey the worm shaft in a horizontal state. The grinding mechanism 2 is arranged on the top of the conveying mechanism 1 to grind the surface of the worm shaft. The grinding mechanism 2 has a grinding wheel 21 that can move along the length direction of the worm shaft. The deburring device also includes a clamping and positioning mechanism 3 arranged on both sides of the conveying mechanism 1. The clamping and positioning mechanism 3 has two positioning plates 31 that can position and clamp the end of the worm shaft in the vertical direction and an ejector pin 32 that can coaxially abut against the end face of the worm shaft. After the positioning plate 31 abuts against the worm shaft coaxially with the ejector pin 32, it moves towards the ejector pin 32 to disengage from the end of the worm shaft. V-shaped grooves are arranged at the relative ends of the two positioning plates 31. A positioning drive assembly 4 linked with the ejector pin 32 and the positioning plate 31 and a rotation drive assembly 5 linked with the ejector pin 32 are also arranged on the clamping and positioning mechanism 3. The positioning drive assembly 4 is used to drive the ejector pin 32 to abut against the end face of the worm shaft and drive the positioning plate 31 to clamp the end of the worm shaft. The rotation drive assembly 5 is used to drive the ejector pin 32 to drive the worm shaft to rotate synchronously when it abuts against the worm shaft.

[0033] A worm shaft automatic deburring device comprises a conveying mechanism 1, a grinding mechanism 2 and a clamping and positioning mechanism 3. The conveying mechanism 1 is used to convey the worm shaft horizontally to ensure smooth movement of the workpiece; the grinding mechanism 2 is arranged on the top of the conveying mechanism 1, and is equipped with a grinding wheel 21 that can move along the length direction of the worm shaft, and is used to precisely grind the surface of the worm shaft. The clamping and positioning mechanism 3 is located on both sides of the conveying mechanism 1, and its core components include two positioning plates 31 that can move in the vertical direction and a pin 32 that coaxially abuts the end face of the worm shaft. The opposite end of the positioning plate 31 is designed with a V-shaped groove, which can accurately clamp the end of the worm shaft to ensure the stability and centering of the workpiece.

[0034] During the processing, the clamping and positioning mechanism 3 realizes the coaxial contact between the ejector pin 32 and the end face of the worm shaft through the positioning drive assembly 4, and drives the positioning plate 31 to clamp the end of the worm shaft. After the ejector pin 32 is coaxially pressed against the worm shaft, the positioning plate 31 will move toward the ejector pin 32 and disengage from the end of the worm shaft, thereby completely exposing the surface of the workpiece and ensuring that the grinding wheel 21 can perform full surface treatment on the worm shaft without dead angles. In addition, the rotation drive assembly 5 is linked with the ejector pin 32, and can drive it to rotate synchronously when the ejector pin 32 contacts the worm shaft, further improving the uniformity and efficiency of grinding.

[0035] like Figure 3 As shown, in the initial state, the distance between the two positioning plates 31 is larger than the end of the worm shaft, so that the worm shaft can be transported from between the two positioning plates 31 by the transport mechanism 1; Figure 4 As shown, the two positioning plates 31 are close to clamp the end of the worm shaft, and the ejector pin 32 can coaxially abut against the end surface of the worm shaft; Figure 5 As shown, the two positioning plates 31 are separated from the ends of the worm shaft to completely expose the surface of the worm shaft.

[0036] This design not only solves the problem that the traditional deburring device cannot completely grind the worm shaft surface due to fixed clamping, but also realizes the combination of high-precision positioning and uniform grinding through V-groove clamping and rotary drive, which significantly improves the processing quality and efficiency. This device is suitable for the processing of worm shafts of various specifications and has high versatility and practicality.

[0037] like Figure 6 , Figure 7 , Figure 9 and Figure 12 As shown, the positioning drive assembly 4 includes a driving seat 41 that can move along the width direction of the conveying mechanism 1. The driving seat 41 is reversely driven and connected to the ejector pin 32. Two driving arms 42 that can move vertically and extend laterally are provided on the driving seat 41. The two driving arms 42 are respectively fixedly connected to the two positioning plates 31. When the driving seat 41 moves in a direction away from the worm shaft, the two driving arms 42 respectively drive the two positioning plates 31 to clamp the end of the worm shaft and then disengage from the end of the worm shaft.

[0038] Two driving arms 42 that can move vertically are installed on the driving seat 41. The driving arms 42 extend horizontally and are respectively fixedly connected to the two positioning plates 31, forming a stable clamping force transmission path. When the driving seat 41 moves in the direction away from the worm shaft, the two driving arms 42 act synchronously. First, they drive the positioning plates 31 to clamp the end of the worm shaft, ensuring the initial positioning accuracy of the workpiece. Subsequently, before the grinding wheel 21 starts working, the driving arms 42 continue to move, causing the positioning plates 31 to move towards the center drill 32 and disengage from the end of the worm shaft, thus completely exposing the surface of the workpiece and ensuring that the grinding wheel 21 can perform a full-surface treatment on the worm shaft without dead angles.

[0039] As Figure 7 、 Figure 11 and Figure 12 shown, the two clamping and positioning mechanisms 3 further include a frame 33 provided on the side of the conveying mechanism 1. A positioning frame 34 is provided in the frame 33. An elastic reset element 43 is provided between the two driving arms 42. The opposite sides of the two driving arms 42 are sequentially provided with a first horizontal section 421, an inclined section 422, and a second horizontal section 423. The opposite sides of the two driving arms 42 abut against the inner side of the positioning frame 34.

[0040] When the first horizontal section 421 contacts the inner layer of the positioning frame 34, the two positioning plates 31 are in an open state, and the end of the worm shaft on the conveying mechanism 1 can pass through between the two positioning plates 31. When the inclined section 422 slides inside the positioning frame 34, the two positioning plates 31 clamp the worm shaft towards each other. When the second horizontal section 423 slides inside the positioning frame 34, the two positioning plates 31 disengage from the end of the worm shaft to expose the end of the worm shaft.

[0041] An elastic reset element 43 is installed between the two driving arms 42 to ensure smooth force transmission and automatic reset functions during the clamping and disengaging processes. The opposite sides of the driving arms 42 adopt a segmented design, sequentially including a first horizontal section 421, an inclined section 422, and a second horizontal section 423. These segments closely cooperate with the inner side of the positioning frame 34 to form an accurate motion control path.

[0042] The specific working process is as follows: When the first horizontal section 421 contacts the inner layer of the positioning frame 34, the two positioning plates 31 are in an open state. At this time, the end of the worm shaft on the conveying mechanism 1 can smoothly pass through between the two positioning plates 31, realizing the rapid loading and positioning of the workpiece; When the inclined section 422 slides inside the positioning frame 34, the two positioning plates 31 move towards each other driven by the driving arm 42, precisely clamping the end of the worm shaft to ensure the stability and centering of the workpiece during the machining process; When the second horizontal section 423 slides inside the positioning frame 34, the two positioning plates 31 gradually disengage from the end of the worm shaft, completely exposing the surface of the workpiece, providing an unobstructed machining space for the subsequent grinding process.

[0043] As Figure 7 and Figure 10 shown, an elastic connection element 44 is provided between the driving arm 42 and the positioning plate 31.

[0044] The elastic connection element 44 not only ensures that the two positioning plates 31 can flexibly clamp the end of the worm shaft, avoiding damage to the workpiece surface caused by rigid clamping, but also can effectively absorb the vibration generated during the machining process, improving the stability and accuracy of clamping. In addition, the elastic connection element 44 also has an automatic compensation function, which can adapt to worm shafts of different diameters, ensuring uniform distribution of the clamping force and reliability of the clamping effect.

[0045] As Figure 8 shown, the positioning drive assembly 4 further includes a drive rod 45 and a linear push cylinder 46. The drive rod 45 passes through the drive seat 41 and is rotatably connected thereto. The linear push cylinder 46 is arranged on the frame 33 and its output rod is connected to the drive rod 45. A reverse transmission 47 is arranged in the positioning frame 34. The reverse transmission 47 is in transmission connection with the drive rod 45 and the thimble 32. When the drive rod 45 drives the drive seat 41 to move away from the worm shaft, the thimble 32 abuts coaxially against the end face of the worm shaft.

[0046] The drive rod 45 passes through the drive seat 41 and is rotatably connected thereto through a bearing, ensuring smooth movement and minimizing resistance; The linear push cylinder 46 is fixed on the frame 33, and its output rod is rigidly connected to the drive rod 45, providing a stable and controllable linear driving force. A reverse transmission 47 is arranged inside the positioning frame 34. The reverse transmission 47 converts the linear movement of the drive rod 45 into the reverse movement of the thimble 32, realizing the synchronous linkage of the drive rod 45 and the thimble 32.

[0047] When the linear push cylinder 46 starts, its output rod pushes the drive rod 45 to move in a direction away from the worm shaft, and the drive seat 41 moves synchronously therewith. At this time, the reverse transmission 47 converts the linear motion of the drive rod 45 into the axial advancement of the thimble 32, so that the thimble 32 accurately abuts against the end face of the worm shaft coaxially, ensuring the axial positioning accuracy of the workpiece. During this process, the movement of the drive seat 41 also drives the positioning plate 31 to complete the clamping or disengaging action through the drive arm 42, realizing the integrated coordinated control of clamping, positioning, and disengaging.

[0048] As Figure 7 shown, the reverse driver has an inner cavity and an outer cavity coaxial with it. A communication hole 473 is provided between the inner cavity and the outer cavity. A plug column 474 is arranged in the inner cavity. The drive rod 45 penetrates the reverse driver and is connected to the plug column 474. A plug cylinder 475 connected to the thimble 32 is arranged in the outer cavity; when the plug column 474 moves laterally, the plug cylinder 475 moves in the direction opposite to the piston.

[0049] An inner pressure chamber 471 communicating with the communication hole 473 is formed between the plug column 474 and the end face of the inner cavity. An outer pressure chamber 472 communicating with the communication hole 473 is formed between the plug cylinder 475 and the end face of the outer cavity. Hydraulic oil is filled in both the inner pressure chamber 471 and the outer pressure chamber 472.

[0050] The plug column 474 is installed in the inner cavity. The drive rod 45 penetrates the reverse driver and is rigidly connected to the plug column 474 to ensure the stability and accuracy of power transmission; a plug cylinder 475 directly connected to the thimble 32 is provided in the outer cavity. The movement of the plug cylinder 475 directly drives the thimble 32 to complete the axial movement. When the drive rod 45 drives the plug column 474 to move laterally, the hydraulic oil flows between the inner pressure chamber 471 and the outer pressure chamber 472 through the communication hole 473, pushing the plug cylinder 475 to move in the direction opposite to the plug column 474, thereby realizing the accurate abutment or retraction of the thimble 32.

[0051] Specifically, an inner pressure chamber 471 is formed between the plug column 474 and the end face of the inner cavity, and an outer pressure chamber 472 is formed between the plug cylinder 475 and the end face of the outer cavity. The two pressure chambers achieve the dynamic balance of hydraulic oil through the communication hole 473. High-performance hydraulic oil is filled in both the inner pressure chamber 471 and the outer pressure chamber 472 to ensure the smoothness and response speed of the transmission process. When the plug column 474 moves towards the inner pressure chamber 471, the hydraulic oil flows into the outer pressure chamber 472 through the communication hole 473, pushing the plug cylinder 475 to move outwards, driving the thimble 32 to abut against the end face of the worm shaft; conversely, when the plug column 474 retracts, the hydraulic oil flows reversely, and the plug cylinder 475 drives the thimble 32 to disengage from the workpiece worm shaft.

[0052] As Figure 7As shown, a connecting seat 476 which is slidably connected to the worm shaft is provided at one end of the plug cylinder 475 facing the worm shaft. The thimble 32 is connected to the connecting seat 476, and an elastic buffer element 48 is provided between the thimble 32 and the plug cylinder 475.

[0053] The connecting seat 476 and the plug cylinder 475 are smoothly slidably connected through a linear guide or a sliding sleeve to ensure the stability and symmetry of the thimble 32 during movement. The thimble 32 is fixed to the connecting seat 476 through a rigid connecting piece to ensure the accuracy of power transmission. At the same time, a high-performance elastic buffer element 48 is provided between the thimble 32 and the plug cylinder 475. This element adopts a high-elastic material or a spring structure, and can provide a flexible buffer force when the thimble 32 abuts against the end face of the worm shaft, avoiding workpiece damage or equipment vibration caused by rigid contact.

[0054] The design of the elastic buffer element 48 not only effectively absorbs the impact force when the thimble 32 contacts the worm shaft, but also can dynamically adjust the abutting force of the thimble 32 during the processing to ensure the uniform distribution and stability of the clamping force. In addition, the elastic buffer element 48 also has an automatic reset function, and can quickly return to the initial state when the thimble 32 disengages from the worm shaft, preparing for the next processing.

[0055] As Figure 7 shown, an internal threaded hole is provided at one end of the connecting seat 476 facing the thimble 32, and a threaded column 321 which is threadedly connected to the internal threaded hole is provided at one end of the thimble 32 facing the connecting seat 476.

[0056] The threaded column 321 and the internal threaded hole are threadedly connected to adjust the axial position of the thimble 32. When the threaded column 321 rotates relative to the connecting seat 476, the initial position of the thimble 32 can be finely adjusted, so as to adapt to the processing requirements of worm shafts of different specifications and ensure the accurate abutment of the thimble 32 against the end face of the worm shaft.

[0057] This threaded adjustment design has multiple advantages: First, the precise adjustment of the position of the thimble 32 can be achieved through a simple rotation operation, which is convenient to operate and has a high adjustment accuracy; Second, the threaded connection has good self-locking performance, which can ensure that the thimble 32 maintains a stable position during the processing and avoid displacement caused by vibration or external force; Third, the threaded adjustment mechanism has a compact structure, is easy to integrate into the existing equipment, and is convenient for maintenance and replacement.

[0058] As Figure 7 shown, a transverse plate 311 is provided on the positioning plate 31. A threaded rod 312 extending in the vertical direction is provided on the transverse plate 311. The threaded rod 312 penetrates through the driving arm 42 and is slidably matched with it. An adjusting nut 313 which abuts against the driving arm 42 is provided on the threaded column 321.

[0059] The threaded rod 312 passes through the driving arm 42 and moves up and down through a sliding fit, enabling the driving arm 42 to flexibly adjust its position in the vertical direction. An adjusting nut 313 is provided on the threaded rod 312. The adjusting nut 313 is in precise threaded fit with the threaded rod 312 and abuts against the upper surface or the lower surface of the driving arm 42 to form an adjustable support structure.

[0060] When the adjusting nut 313 is rotated, the initial spacing between the threaded rod 312 and the driving arm 42 changes accordingly, thereby adjusting the initial elastic force between the driving arm 42 and the transverse plate 311. This design can not only precisely control the magnitude of the clamping force, but also adapt to the processing requirements of worm shafts of different specifications, ensuring the stability and consistency of clamping. In addition, the self-locking function of the adjusting nut 313 can effectively prevent loosening caused by vibration or external forces during the processing, ensuring the reliability of the equipment operation.

[0061] As Figure 8 shown, the rotary drive assembly 5 includes a driven gear 51, a driving gear 52 and a drive motor 53 arranged in the frame 33. The driven gear 51 and the driving gear 52 are both rotatably connected to the frame 33. The driven gear 51 is in spline connection with the drive rod 45. The driving gear 52 meshes with the driven gear 51. The output shaft of the drive motor 53 is in transmission connection with the driving gear 52.

[0062] The driven gear 51 is in spline connection with the drive rod 45. This connection method can not only transmit a large torque, but also allow the drive rod 45 to have the freedom of axial displacement while rotating, thus realizing the decoupling of rotation and axial movement. The driving gear 52 meshes precisely with the driven gear 51. The gear pair is made of high-strength alloy material and undergoes surface hardening treatment to improve wear resistance and service life. The output shaft of the drive motor 53 is in transmission connection with the driving gear 52 through a coupling or a synchronous belt to ensure the high efficiency and reliability of power transmission.

[0063] When the drive motor 53 is started, the motor output shaft drives the driving gear 52 to rotate, and then drives the driven gear 51 and the drive rod 45 to rotate synchronously. Due to the design of the spline connection, the drive rod 45 can freely perform axial displacement while rotating, so as to realize the rotary grinding of the worm shaft without affecting the axial movement of the center drill 32. This design not only improves the operation efficiency of the equipment, but also ensures the stability and precision of the processing process.

[0064] The above embodiments merely represent one or several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. An automatic deburring device for a worm shaft, comprising a conveying mechanism and a grinding mechanism, wherein the grinding mechanism has a grinding wheel that can move along the length direction of the worm shaft, characterized in that: It also includes a clamping and positioning mechanism arranged on both sides of the conveying mechanism; The clamping and positioning mechanism comprises two positioning plates capable of positioning and clamping the end of the worm shaft in the vertical direction and a pin capable of coaxially abutting against the end surface of the worm shaft. After the pin and the worm shaft are coaxially abutted, the positioning plate moves toward the pin to separate from the end of the worm shaft. The opposite ends of the two positioning plates are provided with V-shaped grooves. The clamping and positioning mechanism is also provided with a positioning drive assembly linked with the ejector and the positioning plate, and a rotation drive assembly linked with the ejector. The positioning drive assembly is used to drive the ejector to abut against the end face of the worm shaft and drive the positioning plate to clamp the end of the worm shaft. The rotation drive assembly is used to drive the ejector to drive the worm shaft to rotate synchronously when it abuts against the worm shaft.

2. The automatic deburring device for a worm shaft according to claim 1, characterized in that: The positioning drive assembly includes a drive seat capable of moving along the width direction of the conveying mechanism; The driving seat is connected to the ejector pin in reverse transmission, and two driving arms capable of vertical movement and horizontal extension are arranged on the driving seat, and the two driving arms are respectively fixedly connected to the two positioning plates; When the driving seat moves in a direction away from the worm shaft, the two driving arms respectively drive the two positioning plates to clamp the end of the worm shaft and then separate from the end of the worm shaft.

3. The automatic deburring device for a worm shaft according to claim 2, characterized in that: The two drive clamping and positioning mechanisms also include a frame arranged on the side of the conveying mechanism; A positioning frame is arranged in the frame, an elastic reset element is arranged between the two driving arms, the opposite sides of the two driving arms are arranged with a first transverse section, an inclined section and a second transverse section in sequence, and the opposite sides of the two driving arms abut against the inner side of the positioning frame.

4. The automatic deburring device for a worm shaft according to claim 2 or 3, characterized in that: An elastic connecting element is arranged between the driving arm and the positioning plate.

5. The automatic deburring device for a worm shaft according to claim 3, characterized in that: The positioning drive assembly also includes a drive rod and a linear push cylinder; The driving rod penetrates the driving seat and is rotatably connected thereto; The linear push cylinder is arranged on the frame and its output rod is connected with the driving rod; A reverse transmission device is arranged in the positioning frame, and the reverse transmission device is connected to the driving rod and the ejector pin. When the driving rod drives the driving seat to move in a direction away from the worm shaft, the ejector pin coaxially abuts against the end face of the worm shaft.

6. The automatic deburring device for a worm shaft according to claim 5, characterized in that: The reverse drive has an inner cavity and an outer cavity coaxial with the inner cavity, and a communication hole is provided between the inner cavity and the outer cavity; A plug is arranged in the inner cavity, and a driving rod passes through the reverse driver and is connected to the plug; A plug cylinder connected to the ejector pin is arranged in the outer cavity; When the plunger moves laterally, the barrel moves in the opposite direction of the piston.

7. The automatic deburring device for a worm shaft according to claim 6, characterized in that: The end of the plug barrel facing the worm shaft is provided with a connecting seat slidably connected thereto, the ejector pin is connected to the connecting seat, and an elastic buffer element is provided between the ejector pin and the plug barrel.

8. The automatic deburring device for a worm shaft according to claim 7, characterized in that: An inner thread hole is arranged at one end of the connection seat facing the ejector pin, and a thread column threadedly connected to the inner thread hole is arranged at one end of the ejector pin facing the connection seat.

9. The automatic deburring device for a worm shaft according to claim 4, characterized in that: A transverse plate is arranged on the positioning plate, a threaded rod extending in a vertical direction is arranged on the transverse plate, the threaded rod penetrates the driving arm and slides with the driving arm, and an adjusting nut abutting against the driving arm is arranged on the threaded column.

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