Special-shaped workpiece clamping device

Abstract

The utility model relates to a special-shaped workpiece clamping device which comprises a bearing plate, a clamping mechanism is installed on the bearing plate, the clamping mechanism comprises a support installed on the bearing plate, a rotating shaft is rotationally connected in the support, one end of the rotating shaft is in transmission connection with a driving motor, a plurality of gears are sleeved on the rotating shaft, racks are meshed on the gears, and the racks are meshed with the clamping mechanism. The racks penetrate through the bearing plate and are in sliding connection with the bearing plate; the inner ring of each gear is rotationally connected with a fixing ring arranged on the rotating shaft in a sleeving mode, a plurality of containing grooves are further formed in the inner ring of each gear, each containing groove is parallel to the corresponding gear in the radial direction, and a spring parallel to the corresponding containing groove is installed in each containing groove. The ends, close to the fixing rings, of the springs are provided with steel balls in sliding connection with the containing grooves, the outer wall of each fixing ring is provided with a plurality of notches which are equal to the containing grooves in number and opposite to the containing grooves in position, and the sides, away from the springs, of the steel balls are located in the notches respectively.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamping devices, in particular to a clamping device for special-shaped workpieces. Background Art

[0002] At present, in the existing technology, more and more special-shaped workpieces are being developed and applied. In the process of processing special-shaped workpieces, it is sometimes necessary to use a clamping device to clamp and fix the special-shaped workpiece. However, since the surface of the special-shaped workpiece is mostly uneven, the existing clamping device can often only clamp one point on the special-shaped workpiece when clamping the special-shaped workpiece. This will result in the special-shaped workpiece being loosely clamped, which can easily cause safety accidents. That is, the existing clamping device is not suitable for clamping special-shaped workpieces. Therefore, there are still shortcomings and deficiencies in the existing technology. Utility Model Content

[0003] The purpose of the utility model is to provide a special-shaped workpiece clamping device to solve the problems raised in the above background technology.

[0004] In order to solve the above problems, the technical solutions adopted by this utility model are as follows:

[0005] A special-shaped workpiece clamping device comprises a horizontally arranged supporting plate, a clamping mechanism mounted on the supporting plate, the clamping mechanism comprising a bracket mounted on the top surface of the supporting plate, a horizontally arranged rotating shaft rotatably connected in the bracket, one end of the rotating shaft being transmission-connected to a drive motor, and a plurality of gears distributed along the length direction of the rotating shaft being mounted on the rotating shaft, each of the gears being meshed with a vertically distributed rack, each of the racks passing through the supporting plate and being slidably connected to the supporting plate;

[0006] The inner ring of each gear is rotatably connected to a fixed ring mounted on the rotating shaft, and the inner ring of each gear is also provided with a number of accommodating grooves equidistantly distributed along the circumference of the gear, each accommodating groove is parallel to the radial direction of the gear, and a spring arranged parallel to the accommodating groove is installed in each accommodating groove, and a steel ball is installed at one end of the spring close to the fixed ring for sliding connection with the accommodating groove, the outer wall of each fixed ring is respectively fitted with the inner ring of the gear, and the outer wall of each fixed ring is provided with a number of notches equal to the number of and opposite to the accommodating grooves, and the side of the steel ball away from the spring is respectively located in the notch.

[0007] Furthermore, the receiving grooves all pass through the gears, and a top screw is threadedly connected in one end of the receiving groove away from the fixing ring.

[0008] Furthermore, the notch is an arc-shaped notch adapted to the steel ball.

[0009] Furthermore, each rack passes through the supporting plate through a through hole vertically opened on the supporting plate, and a guide groove vertically passing through the supporting plate is opened on the two opposite side walls of each through hole, and a strip slider of the same length and parallel to the rack is slidably connected in each guide groove, and the strip sliders are respectively fixedly connected to the rack.

[0010] Furthermore, both ends of each rack are fixedly connected to a limit block, and the limit block is located on the side of the rack away from the gear.

[0011] Furthermore, a strip keyway is provided on the outer wall of the rotating shaft along the axial direction of the rotating shaft, and an installation keyway adapted to the strip keyway is provided on the inner wall of each fixing ring, and a strip key block is installed between several installation keyways and the strip keyway.

[0012] Furthermore, the bracket includes a support seat and a mounting seat relatively arranged on both sides of the supporting plate, the driving motor is horizontally mounted on the mounting seat, and the output shaft of the driving motor is coaxially arranged with the rotating shaft, and the end of the rotating shaft away from the driving motor is rotatably connected to the support seat.

[0013] Furthermore, there are multiple groups of clamping mechanisms, and the multiple groups of clamping mechanisms are equidistantly distributed along the length direction of the supporting plate.

[0014] By adopting the above technical solution, the beneficial effects of the utility model are:

[0015] When the utility model is in use, the carrying plate is fixedly mounted above the special-shaped workpiece, and then driven by the driving motor, the rotating shaft can be rotated, and in the process of the rotating shaft rotating, the fixed ring and the gear can rotate synchronously to drive the rack meshed with the gear to rise and fall, and then when one of the racks descends to abut against the surface of the special-shaped workpiece, the gear meshed with the rack will no longer rotate with the rotation of the rotating shaft, that is, the fixed ring will make the steel ball completely enter the accommodating groove and compress the spring in the process of continuing to rotate with the rotating shaft. At this time, the fixed ring and the gear will not rotate synchronously, and when the special-shaped workpiece gives the rack a vertical When the reverse force is applied in the vertical direction, the steel ball can always press against the outer wall of the fixed ring under the action of the spring rebound force, so that the gear will not rotate in the opposite direction. That is, when the rack abuts the special-shaped workpiece, the position of the rack can remain stationary, so that the rack abutting against the special-shaped workpiece can press the special-shaped workpiece, and the rack that does not press the special-shaped workpiece can continue to descend under the drive of the rotating shaft until all the racks press the special-shaped workpiece. The special-shaped workpiece can be clamped and fixed at multiple points. In other words, the utility model can facilitate the multi-point clamping and fixing of special-shaped workpieces, which can reduce the situation where the special-shaped workpiece is not clamped firmly, and is suitable for clamping special-shaped workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure in a cross-sectional view;

[0018] Figure 3 for Figure 1 One of the structural diagrams of the middle part of the device;

[0019] Figure 4 for Figure 3 Schematic diagram of the structure of the middle part of the device in the split state;

[0020] Figure 5 for Figure 1 The second structural diagram of the middle part of the device.

[0021] Figure numerals: 1. spring; 2. steel ball; 3. fixing ring; 31. notch; 32. mounting keyway; 4. rotating shaft; 41. strip keyway; 5. gear; 51. receiving groove; 6. bracket; 61. support seat; 62. mounting seat; 7. rack; 8. driving motor; 9. bearing plate; 91. through hole; 92. guide groove; 10. top screw; 11. strip slider; 12. limit block; 13. strip key block; 14. steel ball sleeve. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0023] like Figures 1 to 5 As shown, the utility model provides a special-shaped workpiece clamping device, including a horizontally arranged supporting plate 9, a clamping mechanism installed on the supporting plate 9, and a bracket 6 installed on the top surface of the supporting plate 9, a horizontally arranged rotating shaft 4 is rotatably connected in the bracket 6, and one end of the rotating shaft 4 is transmission-connected to a driving motor 8, which is a forward and reverse motor and has its own power supply and start-stop switch; and the rotating shaft 4 is provided with a plurality of gears 5 distributed along the length direction of the rotating shaft 4, and the plurality of gears 5 can be arranged to be equidistantly distributed along the length direction of the rotating shaft 4; the gears 5 are all meshed with vertically distributed racks 7, and the racks 7 all pass through the supporting plate 9 and are slidably connected to the supporting plate 9. Specifically, when in use, the supporting plate 9 is fixedly mounted above the special-shaped workpiece, and then when the driving motor 8 is started, the rotating shaft 4 can be driven to rotate, and during the rotation process of the rotating shaft 4, it can drive the rack 7 meshing with the gear 5 to rise and fall.

[0024] The inner ring of each gear 5 is rotatably connected to a fixed ring 3 mounted on the rotating shaft 4, and the inner ring of each gear 5 is also provided with a number of receiving grooves 51 equidistantly distributed along the circumference of the gear 5, each receiving groove 51 is parallel to the radial direction of the gear 5, and a spring 1 arranged parallel to the receiving groove 51 is installed in each receiving groove 51, and a steel ball 2 is installed at one end of the spring 1 close to the fixed ring 3 for sliding connection with the receiving groove 51, that is, the steel ball 2 can slide along the receiving groove 51; the outer wall of each fixed ring 3 is respectively in contact with the inner ring of the gear 5, and each fixed ring 3 is in contact with the inner ring of the gear 5. The outer wall is provided with a number of notches 31 equal to the number of the accommodating grooves 51 and opposite to each other. The side of the steel ball 2 away from the spring 1 is respectively located in the notches 31. Specifically, the end of the spring 1 close to the fixing ring 3 is provided with a steel ball sleeve 14 installed in the accommodating groove 51 and slidably connected to the accommodating groove 51. The steel ball sleeve 14 is an annular structure; the two sides of the steel ball 2 are respectively against the steel ball sleeve 14 and the notch 31. At this time, the steel ball 2 can be pressed under the action of the spring 1, so that when the rotating shaft 4 rotates, the fixing ring 3 and the gear 5 can rotate synchronously.

[0025] Specifically, when in use, driven by the driving motor 8, when the shaft 4 is rotating, the fixing ring 3 and the gear 5 can rotate synchronously to drive the rack 7 meshing with the gear 5 to rise and fall, and then when one of the racks 7 drops to abut against the surface of the special-shaped workpiece, the gear 5 meshing with the rack 7 will no longer rotate with the rotation of the shaft 4, that is, the fixing ring 3 will make the steel ball 2 completely enter the receiving groove 51 and compress the spring 1 as the shaft 4 continues to rotate. At this time, the fixing ring 3 and the gear 5 will not rotate synchronously, and when the special-shaped workpiece gives the rack 7 a reverse force in the vertical direction, Because under the action of the rebound force of the spring 1, the steel ball 2 can always press against the outer wall of the fixing ring 3, so that the gear 5 will not rotate in the opposite direction, that is, when the rack 7 abuts the special-shaped workpiece, the position of the rack 7 can remain stationary, so that the rack 7 abutting against the special-shaped workpiece can press the special-shaped workpiece, and the rack 7 that does not press the special-shaped workpiece can continue to descend under the drive of the rotating shaft 4 until all the racks 7 press the special-shaped workpiece, and the special-shaped workpiece can be clamped and fixed at multiple points. In other words, the utility model can facilitate the multi-point clamping and fixing of the special-shaped workpiece, which can reduce the situation where the special-shaped workpiece is not clamped firmly, and is suitable for clamping special-shaped workpieces.

[0026] Further, such as Figures 2 to 4As shown, the accommodating grooves 51 all pass through the gear 5, and the accommodating grooves 51 are threadedly connected with a top screw 10 at one end away from the fixing ring 3. By rotating the top screw 10, the degree of compression of the spring 1 in the initial state can be adjusted to prevent the rack 7 from damaging the special-shaped workpiece when pressing the special-shaped workpiece; specifically, when in use, since the rack 7 is lowered to abut against the surface of the special-shaped workpiece, the steel ball 2 must completely enter the accommodating groove 51 and compress the spring 1. In this way, the shorter the spring 1 is compressed in the initial state, the more difficult it is for the steel ball 2 to completely enter the accommodating groove 51, and the tighter the rack 7 will be when it is pressed against the surface of the special-shaped workpiece; and by adjusting the degree of compression of the spring 1 in the initial state, it can be prevented that the rack 7 will not have too much pressing force on the surface of the special-shaped workpiece when abutting against the special-shaped workpiece, so as to avoid damaging the special-shaped workpiece.

[0027] Further, such as Figures 1 to 4 As shown, the notch 31 is an arc-shaped notch adapted to the steel ball 2, so that when the rack 7 drops to abut against the surface of the special-shaped workpiece, the fixing ring 3 can easily move the steel ball 2 out of the notch 31 as the rotating shaft 4 continues to rotate, thereby facilitating the steel ball 2 to completely enter the accommodating groove 51.

[0028] The specific configuration of the rack 7 passing through the carrier plate 9 and being in sliding connection with the carrier plate 9 is as follows: Figure 1 、 Figure 2 and Figure 5 As shown, each rack 7 passes through the supporting plate 9 through a through hole 91 vertically opened on the supporting plate 9, and a guide groove 92 vertically passing through the supporting plate 9 is opened on the two opposite side walls of each through hole 91, and a strip slider 11 of the same length and parallel to the rack 7 is slidably connected in each guide groove 92, and the strip sliders 11 are fixedly connected to the rack 7 respectively. Specifically, the strip slider 11 and the guide groove 92 can limit the rack 7 in the horizontal direction; and in use, when the rack 7 is in the process of lifting, the strip slider 11 cooperates with the guide groove 92 to guide the rack 7, thereby improving the stability of the rack 7 during the lifting process.

[0029] Further, such as Figure 1 、 Figure 2 and Figure 5 As shown, both ends of each rack 7 are fixedly connected to a limit block 12, and the limit block 12 is located on the side of the rack 7 away from the gear 5. Specifically, during use, when the rack 7 is being raised or lowered, the limit block 12 can be made to abut against the supporting plate 9, thereby preventing the rack 7 from falling off the supporting plate 9 due to overtravel.

[0030] The specific arrangement of the fixing ring 3 on the rotating shaft 4 is as follows: Figures 2 to 4As shown, a strip keyway 41 is provided on the outer wall of the rotating shaft 4 along the axial direction of the rotating shaft 4, and a mounting keyway 32 adapted to the strip keyway 41 is provided on the inner wall of each fixing ring 3. A strip key block 13 is installed between several mounting keyways 32 and the strip keyways 41, so that the fixing ring 3 can always rotate with the rotation of the rotating shaft 4.

[0031] The specific configuration of the bracket 6 is as follows: Figure 1 、 Figure 2 and Figure 5 As shown, the bracket 6 includes a support seat 61 and a mounting seat 62 relatively arranged on both sides of the supporting plate 9, the driving motor 8 is horizontally mounted on the mounting seat 62, and the output shaft of the driving motor 8 is coaxially arranged with the rotating shaft 4 and connected through a coupling, and the end of the rotating shaft 4 away from the driving motor 8 is rotatably connected to the support seat 61.

[0032] Further, such as Figure 1 and Figure 2 As shown, there are multiple groups of clamping mechanisms, and the multiple groups of clamping mechanisms are equidistantly distributed along the length direction of the supporting plate 9. In this way, when in use, multiple groups of clamping mechanisms can be used to clamp the same special-shaped workpiece according to their own needs, or each group of clamping mechanisms can be used to clamp a special-shaped workpiece respectively.

[0033] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A special-shaped workpiece clamping device, comprising a horizontally arranged bearing plate, characterized in that: A clamping mechanism is mounted on the carrier plate, comprising a bracket mounted on the top surface of the carrier plate, a horizontally arranged rotating shaft being rotatably connected in the bracket, one end of the rotating shaft being transmission-connected to a drive motor, and a plurality of gears distributed along the length direction of the rotating shaft being mounted on the rotating shaft, each of the gears being meshed with a vertically distributed rack, each of the racks passing through the carrier plate and being slidably connected to the carrier plate; The inner ring of each gear is rotatably connected to a fixed ring mounted on the rotating shaft, and the inner ring of each gear is also provided with a number of accommodating grooves equidistantly distributed along the circumference of the gear, each accommodating groove is parallel to the radial direction of the gear, and a spring arranged parallel to the accommodating groove is installed in each accommodating groove, and a steel ball is installed at one end of the spring close to the fixed ring for sliding connection with the accommodating groove, the outer wall of each fixed ring is respectively fitted with the inner ring of the gear, and the outer wall of each fixed ring is provided with a number of notches equal to the number of and opposite to the accommodating grooves, and the side of the steel ball away from the spring is respectively located in the notch.

2. The special-shaped workpiece clamping device according to claim 1, characterized in that: The receiving grooves all pass through the gears, and a top screw is threadedly connected in one end of the receiving groove away from the fixing ring.

3. The special-shaped workpiece clamping device according to claim 1, characterized in that: The notch is an arc-shaped notch adapted to the steel ball.

4. The special-shaped workpiece clamping device according to claim 1, characterized in that: Each rack passes through the supporting plate through a through hole vertically opened on the supporting plate, and a guide groove vertically passing through the supporting plate is opened on the two opposite side walls of each through hole. A strip slider with the same length and parallel to the rack is slidably connected in each guide groove, and the strip sliders are fixedly connected to the rack respectively.

5. The special-shaped workpiece clamping device according to claim 1, characterized in that: Both ends of each rack are fixedly connected to a limit block, and the limit block is located on a side of the rack away from the gear.

6. The special-shaped workpiece clamping device according to claim 1, characterized in that: A strip keyway is provided on the outer wall of the rotating shaft along the axial direction of the rotating shaft, and an installation keyway adapted to the strip keyway is provided on the inner wall of each fixing ring. A strip key block is installed between several installation keyways and the strip keyways.

7. The special-shaped workpiece clamping device according to claim 1, characterized in that: The bracket includes a support seat and a mounting seat relatively arranged on both sides of the bearing plate. The drive motor is horizontally mounted on the mounting seat, and the output shaft of the drive motor is coaxially arranged with the rotating shaft. The end of the rotating shaft away from the drive motor is rotatably connected to the support seat.

8. The special-shaped workpiece clamping device according to any one of claims 1 to 7, characterized in that: There are multiple groups of clamping mechanisms, and the multiple groups of clamping mechanisms are evenly distributed along the length direction of the supporting plate.

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