Weight set anti-toppling device suitable for dead weight machine and dead weight machine

Abstract

The invention provides a weight set anti-toppling device suitable for a dead weight machine and the dead weight machine, the weight set anti-toppling device comprises a rotating disc assembly, the top of the rotating disc assembly is connected with a rotating disc cover, and a weight set is placed at the top of the rotating disc cover; the pneumatic claw positioning ring mechanism comprises a plurality of three-claw air cylinders and a positioning ring; each positioning ring comprises a positioning sub-ring, the bottom of each positioning sub-ring is connected with a connecting rod, the connecting rods are connected with the output ends of the corresponding three-jaw air cylinders, each three-jaw air cylinder drives the three positioning sub-rings to act at the same time to clamp the weight sets, it can be guaranteed that the positions of the weights in each set are located on the same straight line, and the weights are prevented from toppling over. When the monitoring sensor senses that the position of the rotating disc cover is inclined, the ball cup can be deflected through stretching and retracting of the telescopic air cylinder, so that the levelness of the rotating disc cover is finely adjusted, and the levelness of the top face of the rotating disc cover is controlled within a set range. And by controlling the levelness of the rotating disc cover, the possibility of inclination and toppling of the weight group is further reduced.

Description

Technical Field

[0001] The invention relates to the technical field of force sensor calibration equipment, and in particular to a weight group anti-dumping device suitable for a static weight machine and the static weight machine. Background Art

[0002] A force sensor is a device that converts force signals into electrical signal outputs. It is widely used in 3C product testing, new energy product assembly, precision assembly, robotics, and other industrial testing, measurement, and control systems. Usually, force sensors need to be calibrated when in use to determine the input-output relationship of the force sensor. In the calibration process of the force sensor, the static weight machine is its key equipment. The static weight machine is mainly composed of a frame, a moving beam, a reverser, several groups of weights with different weight specifications, a weight tray for carrying the weight group, and a weight loading and unloading mechanism for driving the weight tray to rise and fall. Each weight group contains multiple weights. During calibration, the weight tray is rotated so that the required weight group is hung on the reaction frame. The weight loading and unloading mechanism drives the weight tray to move down, so that the weights are loaded one by one on the reaction frame to perform a calibration test on the force sensor.

[0003] However, when the weight tray is rotated, the weights tend to shake. In the prior art, in order to prevent the weights from falling over, the weight tray is usually rotated slowly to reduce the shaking amplitude of the weights, thereby reducing the possibility of the weights falling over. However, the above method still cannot avoid the problem of weights falling over. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a weight group anti-dumping device suitable for a static weight machine and a static weight machine, so as to avoid the instability of the weight during the rotation process and improve the safety and reliability of the force sensor calibration.

[0005] The present invention is achieved in that:

[0006] In a first aspect, the present invention provides a weight group anti-dumping device suitable for a static weight machine, comprising a rotating disk assembly, a rotating disk cover connected to the top of the rotating disk assembly, and a plurality of weight groups with different weight specifications are placed on the top of the rotating disk cover;

[0007] The device also includes an air gripper positioning ring mechanism, which includes a plurality of three-claw cylinders and positioning rings, and the three-claw cylinders and positioning rings are arranged in one-to-one correspondence with the weight group. There is an accommodating cavity between the rotating disk cover and the rotating disk assembly, and the three-claw cylinder is arranged in the accommodating cavity. The positioning ring is slidably connected to the top of the rotating disk cover;

[0008] Each of the positioning rings includes three positioning sub-rings, and a connecting rod is connected to the bottom of each positioning sub-ring. The rotating disk cover is provided with a long hole, and the connecting rod passes through the long hole and is connected to the corresponding three-claw cylinder output end. Each of the three-claw cylinders drives the three positioning sub-rings to move simultaneously to clamp the weight group.

[0009] Further, the rotating disk assembly is composed of a rotating disk and a cylinder ball seat horizontal adjustment mechanism, the cylinder ball seat horizontal adjustment mechanism includes a ball head base and a ball head seat, the ball head base is fixed on the top of the rotating disk, the ball head seat is hinged on the top of the ball head base, and the rotating disk cover and the three-claw cylinder are both arranged on the top of the ball head seat;

[0010] At least three foot supports are arranged in a circular array on the outer edge of the rotating disk, each of the foot supports is hinged with a telescopic cylinder, and the output end of the telescopic cylinder is hinged with a ball head seat;

[0011] The outer edge of the rotating disk is also provided with a monitoring sensor for monitoring the horizontality of the ball head seat.

[0012] Furthermore, the monitoring sensor is a photoelectric sensor.

[0013] In a second aspect, the present invention provides a static weight machine, comprising the weight set anti-dumping device in the first aspect,

[0014] Furthermore, it also includes a frame, a reverser, a weight group, a weight loading and unloading mechanism and a moving beam, wherein the frame includes a bottom plate, a middle beam and an upper beam, wherein the bottom plate is rigidly connected to the middle beam through four columns, and the middle beam is rigidly connected to the upper beam through four guide rods;

[0015] The middle beam and the upper beam are rotatably connected with a pair of screw rods, the movable beam is mounted on the screw rods through a nut sleeve, and a clamp for fixing the force sensor to be tested is arranged on the top of the movable beam;

[0016] The upper end of the deflector is hung on the upper beam and slidably connected to the upper beam, the lower end of the deflector is connected to a weight connection mechanism, and the lower end of the weight connection mechanism penetrates the middle beam and extends to the bottom of the middle beam;

[0017] The weight loading and unloading mechanism is arranged on the top of the bottom plate, and the weight group anti-dumping device is installed on the upper end of the weight loading and unloading mechanism.

[0018] Furthermore, a driving mechanism for driving the screw rod to rotate is arranged at the bottom of the center beam, and the driving mechanism includes a first servo motor, the first servo motor is connected to two reducers, and the reducers are connected to the screw rod.

[0019] Furthermore, the reverser is rigidly connected by an upper support, a pull rod and a lower support to form a frame structure, the upper support is hung on the upper beam, the lower end of the pull rod passes through the moving beam and extends to the lower end of the moving beam, and the weight connection mechanism is hung on the lower support and slidably connected to the lower support.

[0020] Furthermore, the weight connection mechanism includes a hanging rod connected to the lower support, the upper end of the hanging rod has an inverted cone-shaped connecting portion, the connecting portion is used to hang the hanging rod on the lower support, the lower end of the hanging rod is provided with a hanging portion, the hanging portion is provided with a hanging groove, the upper end of the weight group is provided with a hanging rod matching the hanging groove, when the weight group is loaded, the hanging rod is connected in the hanging groove.

[0021] Furthermore, the weight loading and unloading mechanism includes a screw lift, a fixed bracket, a mounting disk and a rotating assembly that drives the rotating disk to rotate. The fixed bracket is fixed on the base plate, and the fixed bracket has an upper and lower layer structure. The screw lift is arranged on the upper layer of the fixed bracket, and the screw lift is connected to the mounting disk. A guide rod is arranged at the bottom of the mounting disk, and the guide rod is slidably connected to the fixed bracket. The rotating assembly is arranged on the top of the mounting disk.

[0022] The advantages of the present invention are that when the rotating disk rotates, the positioning ring is clamped on the outer wall of the weight group, which can ensure that the position of each group of weights is in a straight line, thereby preventing the weights from tipping over. When the monitoring sensor senses that the rotating disk cover is tilted, the ball head seat can be deflected by the extension of the telescopic cylinder to fine-tune the horizontality of the rotating disk cover, so that the horizontality of the top surface of the rotating disk cover is controlled within a set range. By controlling the horizontality of the rotating disk cover, the possibility of the weight group tilting and tipping over is further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0024] Figure 1 The present invention is a schematic structural diagram of a weight group anti-dumping device suitable for a static weight machine.

[0025] Figure 2 It is a schematic diagram of the structure of the static weight machine of the present invention.

[0026] Figure 3 The local structure of the static weight machine of the present invention is shown in FIG. Figure 1 .

[0027] Figure 4 The local structure of the static weight machine of the present invention is shown in FIG. Figure 2 .

[0028] Figure 5It is a schematic diagram of the connection structure between the reverser and the weight connection mechanism of the present invention.

[0029] Figure 6 It is a partial structural schematic diagram of the weight set of the present invention being hung on the weight connecting mechanism;

[0030] Figure 7 The local structure of the static weight machine of the present invention is shown in FIG. Figure 3 ;

[0031] Description of the numbers in the figure:

[0032] 1. Rotating plate assembly; 101. Rotating plate; 102. Cylinder ball seat horizontal adjustment mechanism; 1021. Ball head base; 1022. Ball head seat; 1023. Foot support; 1024. Telescopic cylinder; 103. Monitoring sensor; 2. Rotating plate cover; 21. Long hole; 3. Weight set; 31. Suspension rod; 4. Air claw positioning ring mechanism; 41. Three-claw cylinder; 42. Positioning ring; 421. Positioning sub-ring; 43. Clamping piece; 44. Connecting rod; 5. Frame; 51. Bottom plate; 52. Middle beam; 53 , upper beam; 6, reverser; 61, upper support; 62, pull rod; 63, lower support; 7, weight loading and unloading mechanism; 71, screw lift; 72, fixed bracket; 73, mounting plate; 74, rotary assembly; 75, guide rod; 76, second servo motor; 8, moving beam; 81, clamp; 9, screw; 10, guide rod; 11, weight connecting mechanism; 111, hanging rod; 112, connecting part; 113, hanging part; 12, driving mechanism; 121, first servo motor; 122, reducer. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings and specific implementation methods. In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions, directions or positional relationships based on the positions, directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, direction or position, be constructed and operated in a specific position, direction or position, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] For example, see Figure 1 The present invention provides a weight group anti-dumping device 100 suitable for a static weight machine, comprising a rotating disk assembly 1, a rotating disk cover 2 is connected to the top of the rotating disk assembly 1, and a plurality of weight groups 3 with different weight specifications are placed on the top of the rotating disk cover 2;

[0036] The device also includes an air gripper positioning ring mechanism 4, which includes a plurality of three-claw cylinders 41 and positioning rings 42. The three-claw cylinders 41 and positioning rings 42 are arranged in a one-to-one correspondence with the weight groups 3. For example, if the weight groups 3 are provided with four groups, then four three-claw cylinders 41 and positioning rings 42 are provided respectively; there is an accommodating cavity between the rotating disk cover 2 and the rotating disk assembly 1, the three-claw cylinder 41 is arranged in the accommodating cavity, and the positioning ring 42 is slidably connected to the top of the rotating disk cover 2;

[0037] Each of the positioning rings 42 includes three positioning sub-rings 421, each positioning sub-ring 421 is provided with a clamping piece 43 made of a soft material (such as polyurethane) on its inner side, each positioning sub-ring 421 is connected to a connecting rod 44 at the bottom, the rotating disk cover 2 is provided with a long hole 21, and the connecting rod 44 passes through the long hole 21 and is connected to the output end of the corresponding three-claw cylinder 41. When the rotating disk assembly 1 rotates, each of the three-claw cylinder 41 drives the three positioning sub-rings 421 to move simultaneously to clamp the weight group 3. The clamping piece 43 can prevent the positioning sub-ring 421 from directly contacting the weight, preventing the weight group from being damaged and affecting the calibration accuracy.

[0038] Specifically, the rotating disk assembly 1 is composed of a rotating disk 101 and a cylinder ball seat horizontal adjustment mechanism 102, the cylinder ball seat horizontal adjustment mechanism 102 includes a ball head base 1021 and a ball head seat 1022, the ball head base 1021 is fixed to the top of the rotating disk 101, the ball head seat 1022 is ball-hinged at the top of the ball head base 1021, and the rotating disk cover 2 and the three-claw cylinder 41 are both arranged on the top of the ball head seat 1022;

[0039] At least three foot supports 1023 are arranged in a circular array on the outer edge of the rotating disk 101, each foot support 1023 is hinged with a telescopic cylinder 1024, and the output end of the telescopic cylinder 1024 is hinged with the ball head seat 1022;

[0040] The outer edge of the rotating disk 101 is also provided with a monitoring sensor 103 for monitoring the horizontality of the ball head seat 1022. When the monitoring sensor 103 detects that the ball head seat 1022 is tilted, the control system controls the extension and contraction of the telescopic cylinder 1024 to make the ball head seat 1022 deflect, so as to fine-tune the horizontality of the rotating disk cover 2, so that the horizontality of the top surface of the rotating disk cover 2 is controlled within a set range.

[0041] Specifically, the monitoring sensor 103 is a photoelectric sensor, which determines the tilt of the ball head base 1021 by monitoring the distance between the ball head base 1022 and the rotating disk 101 .

[0042] For example 2, please refer to Figures 1 to 7 The present invention provides a static weight machine 200, including a weight group anti-dumping device 100 suitable for a static weight machine in the first embodiment, and also including a frame 5, a reverser 6, a weight group 3, a weight loading and unloading mechanism 7 and a moving beam 8, wherein the frame 5 includes a bottom plate 51, a middle beam 52 and an upper beam 53, wherein the bottom plate 51 is rigidly connected to the middle beam 52 through four columns, wherein the middle beam 52 is rigidly connected to the upper beam 53 through four guide rods 10, and wherein the guide rods 10 are slidably connected to the moving beam 8;

[0043] The middle beam 52 and the upper beam 53 are rotatably connected with a pair of screw rods 9 , the moving beam 8 is mounted on the screw rods 9 via a nut sleeve, and a fixture 81 for fixing the force sensor to be tested is provided on the top of the moving beam 8 .

[0044] The upper end of the deflector 6 is hung on the upper beam 53 and is slidably connected to the upper beam 53. The lower end of the deflector 6 is connected to a weight connecting mechanism 11. The lower end of the weight connecting mechanism 11 penetrates the middle beam 52 and extends to the bottom of the middle beam 52. The moving beam 8 rises to make the force sensor to be tested contact with the deflector 6, and lifts up the deflector 6 so that it is no longer hung on the upper beam 53. At this time, the load of the deflector 6 under the action of the gravity of the deflector 6 is completed.

[0045] The weight loading and unloading mechanism 7 is arranged on the top of the bottom plate 51 , and the weight group anti-dumping device is installed on the upper end of the weight loading and unloading mechanism 7 .

[0046] The static weight machine of the present invention is a small-range static weight machine. The material of the deflector 6 is carbon fiber. The weight of the deflector 6 in the present invention is 1N, and the maximum weight specification of the weight group 3 does not exceed 50N, so as to realize the detection of the miniaturized force sensor.

[0047] Specifically, a driving mechanism 12 for driving the screw rod 9 to rotate is disposed at the bottom of the middle beam 52 . The driving mechanism 12 includes a first servo motor 121 . The first servo motor 121 is connected to two reducers 122 . The reducers 122 are connected to the screw rod 9 .

[0048] Specifically, the reverser 6 is rigidly connected by an upper support 61, a pull rod 62 and a lower support 63 to form a frame structure. The upper support 61 is hung on the upper beam 53, and the upper support 61 is slidably connected to the upper beam 53. The lower end of the pull rod 62 passes through the moving beam 8 and extends to the lower end of the moving beam 8. The weight connection mechanism 11 is hung on the lower support 63 and is slidably connected to the lower support 63.

[0049] Specifically, the weight connecting mechanism 11 includes a hanging rod 111 connected to the lower support 63, the upper end of the hanging rod 111 has an inverted cone-shaped connecting portion 112, and the connecting portion 112 is used to hang the hanging rod 111 on the lower support 63. The lower end of the hanging rod 111 is provided with a hanging portion 113, and the hanging portion 113 is provided with a hanging groove. The upper end of the weight group 3 is provided with a hanging rod 31 matching the hanging groove. When the weight group 3 is loaded, the hanging rod 31 is connected in the hanging groove.

[0050] Specifically, the weight loading and unloading mechanism 7 includes a screw lift 71, a fixed bracket 72, a mounting plate 73, and a slewing assembly 74 for driving the rotating plate 101 to rotate. The fixed bracket 72 is fixed on the bottom plate 51, and the fixed bracket 72 has an upper and lower two-layer structure. The screw lift 71 is arranged on the upper layer of the fixed bracket 72, and the screw lift 71 is connected to the mounting plate 73. A guide rod 75 is arranged at the bottom of the mounting plate 73, and the guide rod 75 is slidably connected to the fixed bracket 72. The slewing assembly 74 is arranged on the top of the mounting plate 73. The screw lift 71 is driven by a second servo motor 76, and the slewing assembly 74 is an electric turntable.

[0051] Select a suitable weight set 3 according to the measuring range of the force sensor to be tested. Control the rotation of the rotary assembly 74 to move the suspension rod 31 at the upper end of the weight set 3 into the suspension slot, and then the screw lift 71 drives the mounting plate 73 to descend, so that the weight set 3 is hung on the weight connection mechanism 11 to test and calibrate the force sensor to be tested.

[0052] The advantages of the present invention are: when the rotating disk 101 rotates, the positioning ring 42 is clamped on the outer wall of the weight group 3, which can ensure that the position of each group of weights is in a straight line, thereby preventing the weights from tipping over. When the monitoring sensor 103 senses that the rotating disk cover 2 is tilted, the ball head seat 1022 can be deflected by the extension of the telescopic cylinder 1024 to fine-tune the horizontality of the rotating disk cover 2, so that the top surface horizontality of the rotating disk cover 2 is controlled within a set range. By controlling the horizontality of the rotating disk cover 2, the possibility of the weight group 3 tilting and tipping over is further reduced.

[0053] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent substitutions and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A weight set anti-dumping device suitable for a static weight machine, characterized in that: It includes a rotating disk assembly, the top of which is connected to a rotating disk cover, and a plurality of weight groups with different weight specifications are placed on the top of the rotating disk cover; The device also includes an air gripper positioning ring mechanism, which includes a plurality of three-claw cylinders and positioning rings, and the three-claw cylinders and positioning rings are arranged in one-to-one correspondence with the weight group. There is an accommodating cavity between the rotating disk cover and the rotating disk assembly, and the three-claw cylinder is arranged in the accommodating cavity. The positioning ring is slidably connected to the top of the rotating disk cover; Each of the positioning rings includes three positioning sub-rings, and a connecting rod is connected to the bottom of each positioning sub-ring. The rotating disk cover is provided with a long hole, and the connecting rod passes through the long hole and is connected to the corresponding three-claw cylinder output end. Each of the three-claw cylinders drives the three positioning sub-rings to move simultaneously to clamp the weight group.

2. The anti-dumping device for a weight set suitable for a static weight machine as claimed in claim 1, characterized in that: The rotating disk assembly is composed of a rotating disk and a cylinder ball seat horizontal adjustment mechanism, the cylinder ball seat horizontal adjustment mechanism includes a ball head base and a ball head seat, the ball head base is fixed on the top of the rotating disk, the ball head seat is hinged on the top of the ball head base, and the rotating disk cover and the three-claw cylinder are both arranged on the top of the ball head seat; At least three foot supports are arranged in a circular array on the outer edge of the rotating disk, each of the foot supports is hinged with a telescopic cylinder, and the output end of the telescopic cylinder is hinged with a ball head seat; The outer edge of the rotating disk is also provided with a monitoring sensor for monitoring the horizontality of the ball head seat.

3. The anti-dumping device for a weight set suitable for a static weight machine as claimed in claim 2, characterized in that: The monitoring sensor is a photoelectric sensor.

4. A static weight machine, characterized in that: The invention comprises a weight group anti-dumping device suitable for a static weight machine as claimed in any one of claims 1 to 3, and also comprises a frame, a reverser, a weight group, a weight loading and unloading mechanism and a moving beam, wherein the frame comprises a bottom plate, a middle beam and an upper beam, wherein the bottom plate is rigidly connected to the middle beam through four columns, and the middle beam is rigidly connected to the upper beam through four guide rods; The middle beam and the upper beam are rotatably connected with a pair of screw rods, the movable beam is mounted on the screw rods through a nut sleeve, and a clamp for fixing the force sensor to be tested is arranged on the top of the movable beam; The upper end of the deflector is hung on the upper beam and slidably connected to the upper beam, the lower end of the deflector is connected to a weight connection mechanism, and the lower end of the weight connection mechanism penetrates the middle beam and extends to the bottom of the middle beam; The weight loading and unloading mechanism is arranged on the top of the bottom plate, and the weight group anti-dumping device is installed on the upper end of the weight loading and unloading mechanism.

5. A static weight machine as claimed in claim 4, characterized in that: A driving mechanism for driving the screw rod to rotate is arranged at the bottom of the middle beam, and the driving mechanism includes a first servo motor, the first servo motor is connected to two reducers, and the reducers are connected to the screw rod.

6. A static weight machine as claimed in claim 4, characterized in that: The reverser is rigidly connected by an upper support, a pull rod and a lower support to form a frame structure. The upper support is hung on the upper beam, the lower end of the pull rod passes through the moving beam and extends to the lower end of the moving beam, and the weight connection mechanism is hung on the lower support and slidably connected to the lower support.

7. A static weight machine as claimed in claim 6, characterized in that: The weight connection mechanism includes a hanging rod connected to the lower support, the upper end of the hanging rod has an inverted cone-shaped connecting portion, the connecting portion is used to hang the hanging rod on the lower support, the lower end of the hanging rod is provided with a hanging portion, the hanging portion is provided with a hanging groove, the upper end of the weight group is provided with a hanging rod matching the hanging groove, when the weight group is loaded, the hanging rod is connected in the hanging groove.

8. A static weight machine as claimed in claim 4, characterized in that: The weight loading and unloading mechanism includes a screw lift, a fixed bracket, a mounting plate and a rotating assembly that drives the rotating plate to rotate. The fixed bracket is fixed on the base plate, and the fixed bracket has an upper and lower layer structure. The screw lift is arranged on the upper layer of the fixed bracket, and the screw lift is connected to the mounting plate. A guide rod is arranged at the bottom of the mounting plate, and the guide rod is slidably connected to the fixed bracket. The rotating assembly is arranged on the top of the mounting plate.

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