An auxiliary support positioning device

Abstract

An auxiliary support positioning device comprises a base, a top rod, a jacking transmission, an automatic locking member and a jacking drive, the top rod is movably arranged on the base along its axial direction, the jacking transmission and the jacking drive are arranged at the side of the base where the top rod is located, the jacking transmission is meshingly connected with the jacking drive and the side surface of the top rod, the automatic locking member is coaxially arranged on the jacking transmission and is connected with the jacking drive through a connecting rod. The jacking rod can be driven to jacking and self-adaptively abutting against the bottom surface of the workpiece to achieve the purpose of auxiliary support by rotating the pull rod and transmitting through a series of transmission structures, the height of the jacking rod does not need to be manually adjusted during the jacking process, the operation is simple, the jacking rod is self-locked through the ratchet and the ratchet claw, so as to ensure the stability and reliability of the support device.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical processing, and in particular to an auxiliary support positioning device capable of randomly adjusting height. Background Art

[0002] When it is necessary to improve the positioning rigidity of the workpiece positioning reference surface and the stability and reliability of the processing process, auxiliary supports can be used as auxiliary positioning devices. The most common auxiliary support structures are spiral and push-type. Figure 1 As shown, the lifting of the push rod 1 is achieved by rotating the nut at its bottom. Its structure is simple and easy to adjust, but the specific support height needs to be adjusted based on experience, the accuracy is low, and it is not suitable for heavy-load chip use. Figure 2 As shown, by pushing the pusher 2, the inclined wedge 3 moves toward the push rod 1, and then the push rod 1 is lifted. Its structure is relatively simple and easy to operate, but its self-locking property is poor. The lifting angle α of the inclined wedge 3 in the figure is required to be no greater than 6°. Summary of the Invention

[0003] In view of this, an object of the present invention is to provide an auxiliary support positioning device, which has the functions of automatically adjusting the lifting height and automatically locking, thereby improving the accuracy and stability of the entire device.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] An auxiliary support and positioning device includes a base, a push rod, a lifting transmission member, an automatic locking member and a lifting drive member. The push rod is movably arranged on the base along its axial direction. The lifting transmission member and the lifting drive member are respectively arranged on the side of the base located at the push rod. The lifting transmission member is respectively engaged and connected with the side surfaces of the lifting drive member and the push rod. The automatic locking member is also coaxially arranged on the lifting transmission member, and the automatic locking member is connected to the lifting drive member through a connecting rod.

[0006] Preferably, the jacking drive member includes a pull rod and a semicircular gear, the semicircular gear is rotatably arranged inside the base, the pull rod is radially arranged along the semicircular gear and one end thereof is fixedly connected to the center of the semicircular gear, and the other end extends to the outside of the base, the jacking transmission member includes a driven gear and a driving gear, the driven gear and the driving gear are respectively rotatably arranged inside the base at the side of the top rod and are meshed with each other, the driving gear is meshed with the semicircular gear, and a rack is also provided at the side of the top rod along its axial direction and is meshed with the driven gear, the pull rod is rotated to drive the semicircular gear to rotate clockwise or counterclockwise and the top rod is raised or lowered through the meshing transmission of the driving gear, the driven gear and the rack.

[0007] Preferably, a strip-shaped receiving cavity is provided inside the base at a position on the side of the push rod along the axial direction of the push rod, the rack is placed in the strip-shaped receiving cavity and fixedly connected to the side of the push rod, and the driven gear part is located in the strip-shaped receiving cavity and meshed with the rack.

[0008] Preferably, the length of the strip-shaped receiving cavity is L, the length of the rack is l, the arc length of the semicircular gear is S, and 2l≤L≤S.

[0009] Preferably, an intermediate gear is coaxially provided on the driving gear, the intermediate gear is transmission-connected to the driving gear via a transmission locking structure, and the intermediate gear is meshingly connected to the driven gear.

[0010] Preferably, the transmission locking structure includes a connecting shaft, a transmission groove, a transmission column and a spring. The connecting shaft is protruded from the center of the side of the driving gear toward the intermediate gear and the connecting shaft is passed through the shaft hole of the intermediate gear. A plurality of transmission columns arranged along its radial direction are evenly arranged on the circumferential outer surface of the connecting shaft. The transmission column is connected to the circumferential outer surface of the connecting shaft through the spring. A plurality of transmission grooves are evenly recessed along its radial direction on the inner surface of the shaft hole of the intermediate gear. The driving gear is embedded in the transmission groove through the transmission column under the action of the spring to be connected to the intermediate gear for transmission.

[0011] Preferably, the transmission column is a vertebral structure and is arranged with the tip of the vertebral structure facing the transmission groove. The transmission groove is a trapezoidal groove structure. A sleeve structure extends from the end of the transmission column toward the connecting shaft. One end of the spring extends into the sleeve structure and is fixedly connected to the end face of the transmission column.

[0012] Preferably, the automatic locking component includes a ratchet, a ratchet pawl, a baffle and a baffle rod, the ratchet is coaxially connected to the driven gear, one end of the baffle rod is rotatably connected to the center position of the ratchet, the connecting rod is rotatably connected to the pull rod and the other end of the baffle rod respectively, the ratchet pawl is rotatably arranged above the ratchet through a pin shaft, and the baffle is provided at a position between the ratchet pawl and the ratchet, the pull rod is driven by the connecting rod to drive the baffle rod to rotate clockwise or counterclockwise so that the baffle is inserted into or disengaged from between the ratchet pawl and the ratchet, thereby causing the ratchet pawl to disengage from or embed into the teeth of the ratchet to unlock or lock the driven gear.

[0013] Compared with the prior art, the present invention provides an auxiliary support positioning device, which can drive the push rod to lift and adaptively rest against the bottom surface of the workpiece to achieve the purpose of auxiliary support by rotating the pull rod and transmitting through a series of transmission structures. During the lifting process, there is no need for manual intervention to adjust the height of the push rod, and the operation is simple.

[0014] When the push rod is lifted into position, the transmission locking structure between the intermediate gear and the driving gear fails, and the transmission connection between the two is disconnected. At the same time, the baffle plate, driven by the pull rod, rotates along the circumference of the ratchet wheel and disengages from between the ratchet wheel and the ratchet pawl, so that the ratchet pawl engages with the teeth of the ratchet wheel to lock the driven gear. The rack transmission further locks the push rod, keeping it against the bottom surface of the workpiece. This device achieves self-locking through the ratchet wheel and ratchet pawl, thereby ensuring the stability and reliability of the support device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural schematic diagram of a spiral auxiliary support structure in the prior art;

[0017] Figure 2 It is a structural schematic diagram of a push-type auxiliary support structure in the prior art;

[0018] Figure 3 A schematic structural diagram of an auxiliary support and positioning device provided by the present invention;

[0019] Figure 4 It is a structural diagram of the jacking rod, the jacking transmission member, the automatic locking member, the jacking drive member and the transmission locking structure;

[0020] Figure 5 for Figure 4 A top view of

[0021] Figure 6 Schematic diagram of the working process of the automatic locking part.

[0022] Description of reference numerals and components in the accompanying drawings:

[0023] 1. Push rod; 2. Pusher; 3. Wedge; 4. Base; 5. Workpiece; 6. Connecting rod; 7. Pull rod; 8. Semicircular gear; 9. Driven gear; 10. Driving gear; 11. Rack; 12. Rack-shaped cavity; 13. Intermediate gear; 14. Connecting shaft; 15. Transmission groove; 16. Transmission column; 17. Spring; 18. Sleeve structure; 19. Ratchet; 20. Ratchet pawl; 21. Baffle; 22. Baffle rod; 23. Pin shaft. DETAILED DESCRIPTION

[0024] The technical solutions of the present invention will be clearly and completely described below through specific implementation methods. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0025] See also Figures 3 to 5 As shown, an auxiliary support positioning device includes a base 4, a push rod 1, a lifting transmission member, an automatic locking member and a lifting drive member. The base 4 serves as a load-bearing carrier of the entire device and is arranged below the workpiece 5. Thereafter, the push rod 1 serves as an auxiliary support body in contact with the bottom surface of the workpiece 5 and is movably arranged on the base 4 along its axial direction. The lifting transmission member and the lifting drive member are respectively arranged on the sides of the base 4 located at the push rod 1, and the lifting transmission member is respectively engaged with the side surfaces of the lifting drive member and the push rod 1. The operator can directly operate the lifting drive member and transmit the lifting transmission member to move the push rod 1 on the base 4 until it is in contact with the bottom surface of the workpiece 5. Furthermore, an automatic locking member is coaxially arranged on the lifting transmission member, and the automatic locking member is connected to the lifting drive member by a connecting rod 6. When the push rod 1 is in contact with the bottom surface of the workpiece 5, the self-locking function of the automatic locking member is provided to force the push rod 1 to maintain contact with the bottom surface of the workpiece 5. The above-mentioned components are described in detail below:

[0026] The lifting drive component includes a pull rod 7 and a semicircular gear 8. The semicircular gear 8 is rotatably arranged inside the base 4. The pull rod 7 is radially arranged along the semicircular gear 8 and one end of the pull rod is fixedly connected to the center of the semicircular gear 8, and the other end extends to the outside of the base 4 for the operator to hold.

[0027] The lifting transmission component includes a driven gear 9 and a driving gear 10. The driven gear 9 and the driving gear 10 are respectively rotatably arranged inside the base 4 on the side of the mandrel 1 and meshed with each other. Thereafter, the driving gear 10 is meshed with the semicircular gear 8. A rack 11 is also provided on the side of the mandrel 1 along its axial direction and meshed with the driven gear 9. The operator rotates the pull rod 7 to drive the semicircular gear 8 to rotate clockwise or counterclockwise and the mandrel 1 is raised or lowered through the meshing transmission of the driving gear 10, the driven gear 9 and the rack 11. In this process, the operator does not need to intervene to adjust the lifting height of the mandrel 1 to adapt to the position of the workpiece 5. The operator only needs to rotate the pull rod 7 to lift the mandrel 1 until it is against the bottom surface of the workpiece 5, thereby solving the practical problem of needing to readjust the auxiliary support position every time the workpiece 5 is processed.

[0028] To prevent ejector pin 1 from overlifting and potentially falling out of base 4, a strip-shaped receiving cavity 12 is provided within base 4, adjacent to ejector pin 1, along its axial direction. A rack 11 is positioned within strip-shaped receiving cavity 12 and fixedly connected to the side of ejector pin 1. Driven gear 9 is partially positioned within strip-shaped receiving cavity 12 and meshes with rack 11. The length of strip-shaped receiving cavity 12 is L, the length of rack 11 is l, and the arc length of semicircular gear 8 is S. The relationship between these three parameters is as follows: 2l ≤ L ≤ S. By limiting the length of strip-shaped receiving cavity 12, the range of movement of rack 11 is limited, thereby limiting the range of ejector pin 1's lift.

[0029] When the push rod 1 is driven to contact the bottom surface of the workpiece 5, if the operator continues to rotate the pull rod 7 and applies force to the push rod 1 through a series of structural transmissions, the meshing transmission between the rack 11 and the driven gear 9, as well as the meshing transmission between the driven gear 9 and the driving gear 10 and the semicircular gear 8 will be destroyed and fail. To avoid the above situation, an intermediate gear 13 is coaxially provided on the driving gear 10 to mesh the intermediate gear 13 with the driven gear 9. At the same time, a transmission locking structure is provided between the intermediate gear 13 and the driving gear 10. Once the push rod 1 is in contact with the bottom surface of the workpiece 5, the transmission locking structure will promptly release the transmission connection between the intermediate gear 13 and the driving gear 10, so as to prevent the push rod 1 from being continuously subjected to force upward through the driven gear 9 and the rack 11.

[0030] The transmission locking structure includes a connecting shaft 14, a transmission groove 15, a transmission column 16 and a spring 17. The driving gear 10 is provided with a connecting shaft 14 protruding from the center of the side surface of the intermediate gear 13 and the connecting shaft 14 is passed through the shaft hole of the intermediate gear 13. A plurality of transmission columns 16 arranged along its radial direction are evenly arranged on the circumferential outer surface of the connecting shaft 14. The transmission columns 16 are connected to the circumferential outer surface of the connecting shaft 14 by a spring 17. A plurality of transmission grooves 15 are evenly recessed along its radial direction on the inner side surface of the shaft hole of the intermediate gear 13. The driving gear 10 is embedded in the transmission groove 15 through the transmission column 16 under the action of the spring 17 to be transmission-connected to the intermediate gear 13.

[0031] In this embodiment, the transmission column 16 has a conical structure, with its tip facing the transmission slot 15. The transmission slot 15 has a trapezoidal structure. To strengthen the connection between the transmission column 16 and the connecting shaft 14, a sleeve 18 extends from the end of the transmission column 16 facing the connecting shaft 14. One end of a spring 17 extends into the sleeve 18 and is fixedly connected to the end face of the transmission column 16. During normal upward and downward movement of the push rod 1, the transmission column 16, under the action of the spring 17, engages the transmission slot 15, allowing the intermediate gear 13 to rotate with the driving gear 10. Once the push rod 1 comes into contact with the bottom surface of the workpiece 5, the push rod 1 is restricted from further upward movement and is transmitted through the rack 11 to restrict the driven gear 9 and the intermediate gear 13 from further rotation. At this time, if the operator continues to rotate the pull rod 7 and drives the driving gear 10 to continue rotating, the transmission column 16 connected to the connecting shaft 14 of the driving gear 10 will compress the spring 17 and disengage from the transmission groove 15 on the intermediate gear 13, thereby releasing the transmission connection between the intermediate gear 13 and the driving gear 10. To restore the transmission connection between the driving gear 10 and the intermediate gear 13, it is only necessary to rotate the pull rod 7 in the opposite direction to drive the driving gear 10 to rotate in the opposite direction via the semicircular gear 8. During this process, the transmission column 16 connected to the connecting shaft 14 of the driving gear 10 will re-engage the transmission groove 15, thereby causing the intermediate gear 13 to rotate along with the driving gear 10.

[0032] When the push rod 1 comes into contact with the bottom surface of the workpiece 5, the transmission connection between the intermediate gear 13 and the driving gear 10 is released, that is, the driven gear 9 is no longer subjected to force to rotate. Thereafter, the driven gear 9 remains locked under the self-locking function of the automatic locking member, and is locked by the transmission of the rack 11 to keep the push rod 1 in contact with the bottom surface of the workpiece 5. In this embodiment, the automatic locking member includes a ratchet 19, a ratchet pawl 20, a baffle 21 and a baffle rod 22. The ratchet 19 is coaxially connected to the driven gear 9, one end of the baffle rod 22 is rotatably connected to the center position of the ratchet 19, and the connecting rod 6 is rotatably connected to the other end of the pull rod 7 and the baffle rod 22 respectively. The ratchet pawl 20 is rotatably arranged above the ratchet 19 via a pin shaft 23, and the baffle rod 22 is provided with a baffle 21 at a position between the ratchet pawl 20 and the ratchet 19. The pull rod 7 is driven by the connecting rod 6 to drive the blocking rod 22 to rotate clockwise or counterclockwise so that the blocking plate 21 is inserted into or disengaged from between the ratchet pawl 20 and the ratchet 19, thereby causing the ratchet pawl 20 to disengage from or embed into the gear teeth of the ratchet 19 to unlock or lock the driven gear 9.

[0033] The specific working process is as follows:

[0034] See also Figure 6 As shown, when workpiece 5 requires auxiliary support, the operator rotates pull rod 7 from position C to position C'. Semicircular gear 8 rotates with pull rod 7, and through the coordinated transmission of driving gear 10, intermediate gear 13, driven gear 9, and rack 11, ejector pinion 1 is lifted toward the bottom surface of workpiece 5. Simultaneously, pull rod 7 rotates and, through connecting rod 6, causes baffle 21 to move from position B to position B' with baffle 21, disengaging from between ratchet 19 and ratchet pawl 20. At this point, because ejector pin 1 is in the process of moving and ascending, ratchet 19 is still rotating with driven gear 9. Once the push rod 1 rises and moves until it contacts the bottom surface of the workpiece 5, it cannot move further upward and, through the transmission of the rack 11, forces the driven gear 9 and the intermediate gear 13 to stop rotating. However, the pull rod 7 is still rotating and, through the transmission of the semicircular gear 8, causes the driving gear 10 to continue rotating. At this time, the transmission column 16 in the transmission locking structure rotates out of the transmission groove 15 and disengages, thereby promptly releasing the transmission connection between the driving gear 10 and the intermediate gear 13. Since the driven gear 9 cannot continue to rotate, the ratchet 19 coaxially arranged with the driven gear 9 also stops rotating. At this time, the ratchet pawl 20 arranged above the ratchet 19 rotates from position A to position A' under the action of gravity, that is, it is embedded in the teeth of the ratchet 19 to lock the ratchet 19 from rotating in the opposite direction, preventing the push rod 1 from moving downward and forcing it to maintain contact with the bottom surface of the workpiece 5 to provide auxiliary support.

[0035] When ejector pin 1 is moved downward and released from the underside of workpiece 5 after use, the operator rotates pull rod 7 in the opposite direction, rotating it from position C' to position C. Semicircular gear 8 rotates with pull rod 7, driving driving gear 10 in the opposite direction. During this process, transmission post 16 on driving gear 10 reengages within transmission slot 15 of intermediate gear 13, reestablishing the transmission connection between driving gear 10 and intermediate gear 13. Intermediate gear 13 then drives driven gear 9 and ratchet 19 in the opposite direction, causing ratchet pawl 20 to rotate out from the teeth of ratchet 19. At this point, stopper 22, under the action of connecting rod 6, rotates in the opposite direction with pull rod 7, driving stopper 21 from position B' to position B, that is, to a position between ratchet 19 and ratchet pawl 20. The ratchet pawl 20 completely releases its lock on ratchet 19. Pull rod 7 rotates in the opposite direction, driving ejector pin 1 downward through the coordinated transmission of semicircular gear 8, driving gear 10, intermediate gear 13, driven gear 9, and rack 11.

[0036] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An auxiliary support positioning device, characterized in that: The lifting mechanism comprises a base, a push rod, a lifting transmission member, an automatic locking member and a lifting drive member, wherein the push rod is movably arranged on the base along its axial direction, the lifting transmission member and the lifting drive member are respectively arranged on the side of the base located at the push rod, the lifting transmission member is respectively engaged with the side surfaces of the lifting drive member and the push rod, the automatic locking member is also coaxially arranged on the lifting transmission member, and the automatic locking member is connected to the lifting drive member through a connecting rod; The lifting drive component includes a pull rod and a semicircular gear, the semicircular gear is rotatably arranged inside the base, the pull rod is radially arranged along the semicircular gear and one end of the pull rod is fixedly connected to the center of the semicircular gear, and the other end extends to the outside of the base, the lifting transmission component includes a driven gear and a driving gear, the driven gear and the driving gear are respectively rotatably arranged inside the base at the side of the mandrel and are meshed with each other, the driving gear is meshed with the semicircular gear, and a rack is also provided at the side of the mandrel along its axial direction and is meshed with the driven gear, the pull rod is rotated to drive the semicircular gear to rotate clockwise or counterclockwise and the mandrel is raised or lowered through the meshing transmission of the driving gear, the driven gear and the rack; The automatic locking component includes a ratchet, a ratchet pawl, a baffle and a baffle rod. The ratchet is coaxially connected to the driven gear, one end of the baffle rod is rotatably connected to the center position of the ratchet, and the connecting rod is rotatably connected to the pull rod and the other end of the baffle rod respectively. The ratchet pawl is rotatably arranged above the ratchet through a pin shaft, and the baffle is provided at a position where the baffle is located between the ratchet pawl and the ratchet. The pull rod is driven by the connecting rod to drive the baffle rod to rotate clockwise or counterclockwise so that the baffle is inserted into or disengaged from between the ratchet pawl and the ratchet, thereby causing the ratchet pawl to disengage from or embed into the teeth of the ratchet to unlock or lock the driven gear.

2. The auxiliary support positioning device according to claim 1, characterized in that: A strip-shaped receiving cavity is provided inside the base at a position on the side of the push rod along the axial direction of the push rod. The rack is placed in the strip-shaped receiving cavity and fixedly connected to the side of the push rod. The driven gear part is located in the strip-shaped receiving cavity and meshed with the rack.

3. The auxiliary support positioning device according to claim 2, characterized in that: The length of the strip-shaped cavity is L, the length of the rack is l, the arc length of the semicircular gear is S, and 2l≤L≤S.

4. The auxiliary support positioning device according to claim 1, characterized in that: An intermediate gear is coaxially provided on the driving gear. The intermediate gear is transmission-connected to the driving gear through a transmission locking structure, and the intermediate gear is meshed with the driven gear.

5. The auxiliary support positioning device according to claim 4, characterized in that: The transmission locking structure includes a connecting shaft, a transmission groove, a transmission column and a spring. The driving gear is provided with a connecting shaft protruding toward the center of the side surface of the intermediate gear and the connecting shaft is passed through the shaft hole of the intermediate gear. A plurality of transmission columns arranged along its radial direction are evenly arranged on the circumferential outer surface of the connecting shaft. The transmission column is connected to the circumferential outer surface of the connecting shaft through the spring. A plurality of transmission grooves are evenly recessed along its radial direction on the inner side surface of the shaft hole of the intermediate gear. The driving gear is embedded in the transmission groove through the transmission column under the action of the spring to be transmission-connected to the intermediate gear.

6. The auxiliary support positioning device according to claim 5, characterized in that: The transmission column is a vertebral structure and is arranged with the tip of the vertebral structure facing the transmission groove. The transmission groove is a trapezoidal groove structure. A sleeve structure extends from the end of the transmission column toward the connecting shaft. One end of the spring extends into the sleeve structure and is fixedly connected to the end face of the transmission column.

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