Loading mechanism for free combination of weight sets and dead weight machine

Abstract

The utility model provides a loading mechanism for free combination of weight sets and a dead weight machine, the loading mechanism comprises a plurality of weight sets with different weight specifications and a weight loading and unloading assembly with rotating and lifting functions, the weight sets are placed at the top of the weight loading and unloading assembly, each weight set comprises a plurality of weight bodies, and the weight bodies are arranged on the weight loading and unloading assembly. The top end of each weight body is provided with a connecting disc, the connecting disc is connected with a hanging connector corresponding to the arc-shaped hanging groove, each weight body is provided with an arc-shaped hanging groove, and the arc-shaped hanging groove penetrates through the weight body along the radial direction of the weight body, so that the hanging connector can enter and exit from the arc-shaped hanging groove. Through mutual cooperation of rotation and lifting of the weight loading and unloading assembly, weight bodies on different weight sets are hung on the weight connecting mechanism at the same time, free selection of weights is achieved, combination of the weights is more diversified, and the dead weight machine can be matched with all calibration data in a force value calibration interval.

Description

Technical Field

[0001] This utility model relates to the field of force sensor calibration equipment technology, and in particular to a loading mechanism and static weighing machine for free combination of weight groups. Background Technology

[0002] A force sensor is a device that converts force signals into electrical signals. It has wide applications in 3C product testing, new energy product assembly, precision assembly, robotics, and other industrial testing, measurement, and control systems. Force sensors typically require calibration during use to determine their input-output relationship. A static weighing machine is a key piece of equipment in this calibration process. The static weighing machine mainly consists of a frame, a moving beam, a reverser, several sets of weights of different weights, a weight tray to support the weights, and a weight loading and unloading mechanism to drive the tray's lifting and lowering. Each weight set contains multiple weights. Figure 1 As shown, each weight 14 in the weight set has an axial cavity 1401 at its center. The upper end of each weight is connected to a disk 15 that matches the axial cavity. A connector 16 is connected to the disk 15, extending into and slidingly connecting to the axial cavity 1401 of the weight above it. During calibration, according to the range of the force sensor under test, the weight tray is rotated to hang the required weight set on the reaction frame. The weight loading and unloading mechanism moves the weight tray downwards, loading the weights one by one onto the reaction frame to perform a calibration test on the force sensor.

[0003] The existing weight structure allows the static weighing machine to only pick up and put down weights from the same group, and cannot pick up weights from other groups at the same time. This makes it impossible for the static weighing machine to match all calibration data within the force value calibration range. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a loading mechanism and a static weighing machine for freely combining weight groups, which can remove weights from different groups and realize the free selection of weights.

[0005] This utility model is implemented as follows:

[0006] In a first aspect, this utility model provides a loading mechanism for the free combination of weight groups, which is installed on a static weighing machine. The loading mechanism includes several weight groups of different weight specifications and a weight loading and unloading assembly with rotation and lifting functions. The weight groups are placed on top of the weight loading and unloading assembly, and the several weight groups are arranged in a circular array around the rotation center of the weight loading and unloading assembly. Each weight group includes several weight bodies, and a connecting plate is installed at the top of each weight body. The connecting plate is connected to a hanging connector corresponding to an arc-shaped hanging slot. Each weight body has an arc-shaped hanging slot that penetrates the weight body in the radial direction, so that the hanging connector can enter and exit the arc-shaped hanging slot.

[0007] Furthermore, the center of the arc-shaped hanging groove coincides with the rotation center of the weight loading and unloading assembly.

[0008] Furthermore, the upper end of the hanging connector has a hanging block with an inverted conical structure, and the inner wall of the arc-shaped hanging groove has an inclined surface that matches the hanging block. When the hanging connector moves downward in the vertical direction, the hanging block contacts the inclined surface.

[0009] Furthermore, the weight loading and unloading assembly includes a screw jack, a fixed bracket, a mounting plate, a rotating plate, and a rotary assembly. The fixed bracket has a two-layer structure, with the screw jack located on the upper layer and connected to the mounting plate. A guide rod is provided at the bottom of the mounting plate and is slidably connected to the fixed bracket. The rotary assembly is located on the top of the mounting plate, and the rotating plate is connected to the rotary assembly. The weight set is located on the top of the rotating plate.

[0010] Furthermore, the mounting plate is equipped with a first photoelectric sensor, and the rotating disk is equipped with a plurality of sensing plates, each of which corresponds to a weight set. The first photoelectric sensor detects the sensing plates to monitor whether the rotating disk has rotated to the correct position.

[0011] Furthermore, the rotating disk is equipped with a second photoelectric sensor, the sensing end of which faces the fixed bracket. The second photoelectric sensor monitors whether the hanging connector is hooked into the hanging slot by sensing the height change of the rotating disk.

[0012] Secondly, this utility model provides a static weighing machine, including a loading mechanism for free combination of weight groups as described in the first aspect, and also including a frame, a reverser and a moving beam. The frame includes a base plate, a middle beam and an upper beam. The loading mechanism is set on the top of the base plate. The base plate is rigidly connected to the middle beam through four columns. The middle beam is rigidly connected to the upper beam through four guide rods.

[0013] A pair of lead screws are rotatably connected between the middle beam and the upper beam. The moving beam is mounted on the lead screws by a nut sleeve. A clamp for fixing the force sensor under test is provided on the top of the moving beam.

[0014] The upper end of the reverser is hung on the upper beam and slidably connected to the upper beam. The lower end of the reverser is connected to a weight connection mechanism for grasping the weight set. The lower end of the weight connection mechanism penetrates the middle beam and extends to the bottom of the middle beam.

[0015] Furthermore, a drive mechanism for rotating the lead screw is provided at the bottom of the central beam. The drive mechanism includes a first servo motor, which is connected to two reducers, and the reducers are connected to the lead screw.

[0016] Furthermore, the reverser consists of an upper support, a pull rod, and a lower support rigidly connected 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.

[0017] Furthermore, the weight connection mechanism includes a hanging rod connected to the lower support. The upper end of the hanging rod has an inverted conical connecting part for hanging the hanging rod on the lower support. The lower end of the hanging rod is provided with a hanging part, which has a hanging groove that matches the hanging connector. When the weight set is loaded, the uppermost hanging connector is connected in the hanging groove.

[0018] The advantages of this utility model are:

[0019] By coordinating the rotation and lifting of the weight loading and unloading components, the weight bodies of different weight groups can be simultaneously suspended on the weight connection mechanism, allowing for free selection of weights and more diverse combinations of weights. This enables the static weighing machine to match all calibration data within the force calibration range.

[0020] The first photoelectric sensor monitors whether the rotating disk has rotated into position to ensure that the hanging connector has accurately moved into the hanging slot. The second photoelectric sensor senses the height change of the rotating disk to monitor whether the hanging connector is in contact with the inclined surface in the arc-shaped hanging slot, thus monitoring whether the weight body is loaded on the force sensor under test. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the structure of a weight assembly in the prior art.

[0023] Figure 2This is a schematic diagram of a loading mechanism for freely combining weight sets according to this utility model.

[0024] Figure 3 This is a schematic diagram of the connection structure of the weight bodies within the same group of this utility model.

[0025] Figure 4 This is a schematic diagram of the weight body structure of this utility model.

[0026] Figure 5 for Figure 4 Enlarged view of a portion of point A in the middle.

[0027] Figure 6 This is a schematic diagram of the bottom structure of the weight body of this utility model.

[0028] Figure 7 This is a partial structural diagram of the weight sets of different weight specifications placed on top of the weight loading and unloading assembly of this utility model.

[0029] Figure 8 for Figure 2 Exploded view of the structure shown.

[0030] Figure 9 This is a partial structural diagram of the different groups of weights of this utility model being suspended at the weight connection mechanism.

[0031] Figure 10 This is a schematic diagram of the static weight machine structure of this utility model.

[0032] Figure 11 This is a schematic diagram of a partial structure of the static gravimetric machine of this utility model. Figure 1 .

[0033] Figure 12 This is a schematic diagram of a partial structure of the static gravimetric machine of this utility model. Figure 2 .

[0034] Figure 13 This is a schematic diagram of the connection structure between the reverser and the weight connection mechanism of this utility model.

[0035] Explanation of the labels in the diagram:

[0036] 1. Weight set; 101. Weight body; 1011. Arc-shaped hanging groove; 1012. Inclined surface; 102. Connecting plate; 103. Hanging connector; 104. Hanging block; 2. Weight loading and unloading assembly; 201. Screw jack; 202. Fixed bracket; 203. Mounting plate; 204. Rotary plate; 205. Rotation assembly; 206. Second servo motor; 207. Guide rod; 3. First photoelectric sensor; 4. Induction 5. Second photoelectric sensor; 6. Frame; 61. Base plate; 62. Middle beam; 63. Upper beam; 7. Reverse device; 71. Upper support; 72. Tie rod; 73. Lower support; 8. Moving beam; 9. Guide rod; 10. Lead screw; 11. Clamp; 12. Weight connection mechanism; 121. Hanging rod; 122. Connecting part; 123. Hanging part; 13. Drive mechanism; 131. First servo motor; 132. Reducer. Detailed Implementation

[0037] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings and specific embodiments. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, direction, or position, or be constructed and operated in a specific orientation, direction, or position, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] Example 1, please refer to Figures 1 to 9This utility model provides a loading mechanism 100 for freely combining weight groups, mounted on a static weighing machine 200. The loading mechanism includes several weight groups 1 of different weight specifications and a weight loading and unloading assembly 2 with rotation and lifting functions. The weight groups 1 are placed on top of the weight loading and unloading assembly 2. The several weight groups 1 are arranged in a circular array around the rotation center of the weight loading and unloading assembly 2. Each weight group 1 includes several weight bodies 101. The weight body 101 has a circular structure. A connecting plate 102 is installed at the top of each weight body 101. The connecting plate 102 is connected to a hanging connector 103 corresponding to the arc-shaped hanging groove 1011. Each weight body 101 has an arc-shaped hanging groove 1011. The arc-shaped hanging groove 1011 passes through the center of the weight body 101 and penetrates the weight body 101 in the radial direction, so that the hanging connector 103 can enter and exit the arc-shaped hanging groove 1011.

[0040] By coordinating the rotation and lifting of the weight loading and unloading assembly 2, the weight bodies 101 on different weight groups 1 can be simultaneously suspended on the weight connecting mechanism 12, enabling free selection of weights. Taking four weight groups 1 with different weights as an example, the first weight group 1 consists of ten 1N weight bodies 101, the second weight group 1 consists of ten 2N weight bodies 101, the third weight group 1 consists of ten 3N weight bodies 101, and the fourth weight group 1 consists of ten 5N weight bodies 101.

[0041] As shown in the figure, after the weight connecting mechanism 12 grasps the uppermost weight body in the first weight group, the rotation of the weight loading and unloading component 2 causes all weight groups to rotate synchronously. At this time, the second weight body in the first weight group separates from the first weight body. Subsequently, the weight loading and unloading component 2 rotates and lifts, causing the uppermost weight body in the second weight group to gradually move below the first weight body in the first weight group and hang on it, thus achieving simultaneous loading of weight bodies from different groups. Similarly, the above operation is repeated to simultaneously hang the weight bodies of any weight group on the weight connecting mechanism 12.

[0042] If each of the four sets of weights 1 has one weight body 101 suspended at the weight connection mechanism 12, then the weight set 1 can generate a loading force of 11N on the force sensor being tested. Compared with the prior art, the weight structure of this utility model allows for more diverse combinations of weights, enabling the static weighing machine to match all calibration data within the force calibration range.

[0043] Specifically, the center of the arc-shaped hanging groove 1011 coincides with the rotation center of the weight loading and unloading assembly 2.

[0044] Specifically, the upper end of the hanging connector 103 has a hanging block 104 with an inverted conical structure, and the inner wall of the arc-shaped hanging groove 1011 has an inclined surface 1012 that matches the hanging block 104. When the hanging connector 103 moves downward in the vertical direction, the hanging block 104 contacts the inclined surface 1012. Taking two adjacent weight bodies 101 as an example, in the initial state, the hanging block 104 is not in contact with the inclined surface 1012, so at this time, the lower weight body 101 is in an unloaded state. When the output end of the weight loading and unloading assembly 2 retracts, the weight body 101 gradually falls, causing the hanging block 104 to contact the inclined surface 1012. At this time, the weight body 101 located below is suspended at the lower end of the upper weight body 101, and the weight body 101 located below is in a loaded state.

[0045] Specifically, the weight loading and unloading assembly 2 includes a screw jack 201, a fixed bracket 202, a mounting plate 203, a rotating plate 204, and a rotary assembly 205. The fixed bracket 202 has a two-layer structure, with the screw jack 201 located on the upper layer. The screw jack 201 is connected to the mounting plate 203, and its output end is connected to the bottom of the mounting plate 203. The screw jack 201 is driven by a second servo motor 206. A guide rod 207 is provided at the bottom of the mounting plate 203, and the guide rod 207 is slidably connected to the fixed bracket 202. The rotary assembly 205 is located on top of the mounting plate 203, and the rotating plate 204 is connected to the rotary assembly 205. The weight set 1 is located on top of the rotating plate 204. The rotary assembly 205 is an electric turntable. By controlling the rotation of the rotary component 205, the combined weight body 101 is rotated sequentially to the weight connection mechanism 12. After the weight loading and unloading component 2 descends, the weight body 101 is suspended at the weight connection mechanism 12 to test and calibrate the force sensor under test.

[0046] Specifically, the mounting plate 203 is equipped with a first photoelectric sensor 3, and the rotating plate 204 is equipped with a plurality of sensing plates 4. Each sensing plate 4 corresponds to a weight group 1. The first photoelectric sensor 3 detects the sensing plates 4 to monitor whether the rotating plate 204 has rotated into position.

[0047] Specifically, the rotating disk 204 is equipped with a second photoelectric sensor 5, the sensing end of the second photoelectric sensor 5 facing the fixed bracket 202. The second photoelectric sensor 5 monitors whether the hanging connector 103 is hung in the hanging slot by sensing the height change of the rotating disk 204.

[0048] Example 2, please refer to Figures 1 to 13This utility model provides a static weighing machine, including a loading mechanism for freely assembling weight groups 1 as described in Embodiment 1, and also includes a frame 6, a reverser 7, and a moving beam 8. The frame 6 includes a base plate 61, a middle beam 62, and an upper beam 63. The loading mechanism is located on the top of the base plate 61. The base plate 61 is rigidly connected to the middle beam 62 through four columns, and the middle beam 62 is rigidly connected to the upper beam 63 through four guide rods 9.

[0049] A pair of lead screws 10 are rotatably connected between the middle beam 62 and the upper beam 63. The movable beam 8 is mounted on the lead screws 10 by a nut sleeve. A clamp 11 for fixing the force sensor under test is provided on the top of the movable beam 8.

[0050] The upper end of the reverser 7 is hung on the upper beam 63 and is slidably connected to the upper beam 63. The lower end of the reverser 7 is connected to a weight connecting mechanism 12 for gripping the weight group 1. The lower end of the weight connecting mechanism 12 penetrates the middle beam 62 and extends to the bottom of the middle beam 62.

[0051] Specifically, the bottom of the middle beam 62 is provided with a drive mechanism 13 for driving the lead screw 10 to rotate. The drive mechanism 13 includes a first servo motor 131, which is connected to two reducers 132. The reducers 132 are connected to the lead screw 10.

[0052] After the force sensor under test is placed on the fixture 11, the drive mechanism 13 drives the lead screw 10 to rotate, causing the moving beam 8 to rise until the force sensor under test contacts the reverser 7 and lifts the reverser 7 so that it is no longer hung on the upper beam 63. At this time, the load of the reverser 7 under the action of gravity is completed on the force sensor under test.

[0053] When the weight set 1 is suspended on the weight connection mechanism 12, the load of the reverser 7 and the weight body 101 is jointly applied to the force sensor under test.

[0054] Specifically, the reverser 7 consists of an upper support 71, a pull rod 72, and a lower support 73 rigidly connected to form a frame structure. The upper support 71 is hung on the upper beam 63, the lower end of the pull rod 72 passes through the moving beam 8 and extends to the lower end of the moving beam 8, and the weight connecting mechanism 12 is hung on the lower support 73 and slidably connected to the lower support 73. The reverser 7 is made of carbon fiber.

[0055] Specifically, the weight connection mechanism 12 includes a hanging rod 121 connected to the lower support 73. The hanging rod 121 is slidably connected to the lower support 73. The upper end of the hanging rod 121 has an inverted conical connecting part 122. The connecting part 122 is used to hang the hanging rod 121 on the lower support 73. The lower end of the hanging rod 121 is provided with a hanging part 123. The hanging part 123 has a hanging groove that matches the hanging connector 103. When the weight group 1 is loaded, the uppermost hanging connector 103 is connected in the hanging groove.

[0056] The advantages of this invention are as follows: By coordinating the rotation and lifting of the weight loading / unloading assembly 2, the weight bodies 101 from different weight groups 1 can be simultaneously suspended on the weight connecting mechanism 12, allowing for free selection of weights and more diverse weight combinations. This enables the weighing machine to match all calibration data within the force calibration range. The first photoelectric sensor 3 monitors whether the rotating disk 204 has rotated to the correct position to monitor whether the hanging connector 103 has accurately moved into the hanging slot. The second photoelectric sensor 5 senses the height change of the rotating disk 204 to monitor whether the hanging connector 103 is in contact with the inclined surface 1012 within the arc-shaped hanging slot 1011, thereby monitoring whether the weight body is loaded onto the force sensor being tested.

[0057] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent substitutions and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A loading mechanism for freely combining weight sets, characterized in that: The loading mechanism, mounted on a static weighing machine, includes several weight groups of different weight specifications and a weight loading and unloading assembly with rotation and lifting functions. The weight groups are placed on top of the weight loading and unloading assembly, and the weight groups are arranged in a circular array around the rotation center of the weight loading and unloading assembly. Each weight group includes several weight bodies, and a connecting plate is installed at the top of each weight body. The connecting plate is connected to a hanging connector corresponding to an arc-shaped hanging slot. Each weight body has an arc-shaped hanging slot that penetrates the weight body radially, allowing the hanging connector to enter and exit the arc-shaped hanging slot.

2. The loading mechanism for freely combining weight sets as described in claim 1, characterized in that: The center of the arc-shaped hanging groove coincides with the rotation center of the weight loading and unloading assembly.

3. The loading mechanism for freely combining weight sets as described in claim 1, characterized in that: The upper end of the hanging connector has a hanging block with an inverted conical structure, and the inner wall of the arc-shaped hanging groove has an inclined surface that matches the hanging block. When the hanging connector moves downward in the vertical direction, the hanging block contacts the inclined surface.

4. The loading mechanism for freely combining weight sets as described in claim 1, characterized in that: The weight loading and unloading assembly includes a screw jack, a fixed bracket, a mounting plate, a rotating plate, and a rotary assembly. The fixed bracket has a two-layer structure, with the screw jack located on the upper layer and connected to the mounting plate. A guide rod is provided at the bottom of the mounting plate and is slidably connected to the fixed bracket. The rotary assembly is located on the top of the mounting plate, and the rotating plate is connected to the rotary assembly. The weight set is located on the top of the rotating plate.

5. A loading mechanism for freely combining weight sets as described in claim 4, characterized in that: The mounting plate is equipped with a first photoelectric sensor, and the rotating disk is equipped with a plurality of sensing plates, each of which corresponds to a set of weights. The first photoelectric sensor detects the sensing plates to monitor whether the rotating disk has rotated to the correct position.

6. The loading mechanism for freely combining weight sets as described in claim 4, characterized in that: The rotating disk is equipped with a second photoelectric sensor, the sensing end of which faces the fixed bracket. The second photoelectric sensor monitors whether the hanging connector is hooked into the hanging slot by sensing the height change of the rotating disk.

7. A static weighing machine, characterized in that: The device includes a loading mechanism for freely combining weight sets as described in any one of claims 1-6, and further includes a frame, a reverser, and a moving beam. The frame includes a base plate, a middle beam, and an upper beam. The loading mechanism is disposed on the top of the base plate. The base 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. A pair of lead screws are rotatably connected between the middle beam and the upper beam. The moving beam is mounted on the lead screws by a nut sleeve. A clamp for fixing the force sensor under test is provided on the top of the moving beam. The upper end of the reverser is hung on the upper beam and slidably connected to the upper beam. The lower end of the reverser is connected to a weight connection mechanism for grasping the weight set. The lower end of the weight connection mechanism penetrates the middle beam and extends to the bottom of the middle beam.

8. A static weighing machine as described in claim 7, characterized in that: The bottom of the central beam is provided with a drive mechanism for rotating the lead screw. The drive mechanism includes a first servo motor, which is connected to two reducers, and the reducers are connected to the lead screw.

9. A static weighing machine as described in claim 7, characterized in that: The reverser consists of an upper support, a pull rod, and a lower support rigidly connected 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.

10. A static weighing machine as described in claim 9, 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 conical connecting part for hanging the hanging rod on the lower support. The lower end of the hanging rod is provided with a hanging part, which has a hanging groove that matches the hanging connector. When the weight set is loaded, the uppermost hanging connector is connected in the hanging groove.

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