CN110196137B

CN110196137B - Disc-shaped weight loading mechanism

Info

Publication number: CN110196137B
Application number: CN201910387487.6A
Authority: CN
Inventors: 庞桂兵; 卜繁岭; 高腾
Original assignee: Dalian Prison Technology Co ltd
Current assignee: Dalian Prison Technology Co ltd
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2022-07-08
Anticipated expiration: 2039-05-09
Also published as: CN110196137A

Abstract

The invention discloses a disc-shaped weight loading mechanism which comprises a plurality of stacked disc-shaped weights, a weighing part and a loading and unloading part, wherein flanges are arranged on the edges of the disc-shaped weights; the weighing part comprises a weight tray for supporting the disc-shaped weight to weigh; the loading and unloading part comprises at least three tension rods (16) with the same structure, which are vertically arranged and distributed on the periphery of the disc-shaped weight (22); the plurality of code pulling rods (16) are respectively and synchronously connected with vertical driving units which move up and down in a mode of rotating around the axes of the code pulling rods; the stacking rod (16) corresponds to each layer of flange of the disc-shaped weight (22) in the axial direction and is provided with an overlapping convex disc (95), the overlapping convex disc (95) enables the disc-shaped weight (22) and each layer of the overlapping convex disc (95) to be completely overlapped until the stacking rod (16) rotates for a circle, and the overlapping convex disc (95) and the disc-shaped weight (22) are separated from overlapping from each other from each layer from bottom to top. The disc-shaped weight loading mechanism has the characteristics of flexible operation, compact structure and moderate cost.

Description

Disc-shaped weight loading mechanism

Technical Field

The invention relates to a weighing mechanism, in particular to a disc-shaped weight loading mechanism.

Background

In the field of physical quantity detection, it is often necessary to detect the system pressure. Pressure is one of the important process parameters in industrial production, and a pressure gauge is an instrument for measuring pressure. Various pressure gauges, pressure sensors and pressure transmitters are common instruments for pressure detection, and are applied in almost all fluid-related fields such as chemical industry, petroleum, aerospace, automobiles, power generation, medium transmission, water supply and gas supply and the like. The performance of the pressure gauge is directly related to the quality of a detection result, and in order to ensure the detection precision of the pressure gauge, the pressure gauge must be regularly measured and checked. If the pressure is not satisfactory, the production efficiency is influenced, the product quality is reduced, and even serious safety accidents are caused, so the pressure measurement has a special position in industrial production. Therefore, the pressure gauge needs to be calibrated regularly, and the pressure gauge is large in quantity, so that the pressure gauge is required to be calibrated conveniently, quickly, efficiently and accurately. Therefore, the pressure gauge needs to be checked when the pressure gauge is shipped or used for a certain time, and the adopted instrument is a piston pressure gauge.

The piston pressure gauge integrates pressure making and pressure calibration, and can perform corresponding precision calibration and measurement on a measured object by being matched with weights with proper precision. The pressure loading of the piston manometer was applied by a weight. Chinese patent 201410229031.4 relates to a free combination automatic code adding device, 201710373500.3 relates to an automatic sequential code adding mechanism, 201410227718.4 relates to a sequential code adding device. These three patents utilize either a barrel weight or a disc weight for loading and are applicable to piston gauges. The problems are that the loading mechanism is complicated, the manufacturing cost is high, and the operation is inconvenient.

Disclosure of Invention

The invention provides a disc-shaped weight loading mechanism which is flexible to operate, compact in structure and moderate in cost.

In order to achieve the aim, the invention provides a disc-shaped weight loading mechanism which comprises a plurality of disc-shaped weights, a weighing part and a loading and unloading part, wherein the disc-shaped weights are stacked and provided with flanges at the edges; the weighing part comprises a weight tray for supporting the disc-shaped weight to be weighed. The loading and unloading part comprises at least three code pulling rods which are vertically arranged on the periphery of the disc-shaped weight and have the same structure; the plurality of code pulling rods are respectively and synchronously connected with a vertical driving unit which moves up and down in a mode of rotating around the axis of the code pulling rods. Each code pulling rod is connected with a toothed belt surrounding all the code pulling rods and the outer sides of the disc-shaped weights through a fixed toothed belt wheel. The stacking bar corresponds to each layer in the axial direction, a flange of the disc-shaped weight is provided with a radially outward lap joint convex disc, the lap joint convex disc of each layer and the flange lap joint surface of the disc-shaped weight are gradually enlarged along the direction from bottom to top, so that the disc-shaped weight and each layer are overlapped, the lap joint convex discs are overlapped with each other, the stacking bar rotates for a circle, and the lap joint convex discs and the disc-shaped weight are separated from the lap joint one by one from each layer which is up to bottom. One end of one code pulling rod is provided with a code pulling rod angle control device for driving the code pulling rod to rotate around the axis.

The disc-shaped weight is disc-shaped, the lapping surface is a sector surface from the self-contact to the self-separation of the disc-shaped weight and each layer of the lapping convex disc, and the size of the sector surface can be determined by the sector angle of the disc surface of the disc. Preferably, the lapping convex disc is an incomplete disc surface around the axis of the puller rod as shown in fig. 1; in order to ensure the loading of the disc-shaped weights on the uppermost layer, the lapping convex disc on the uppermost layer is completely lost relative to the disc surface in the direction of one side part of the code pulling rod, so that the lapping convex disc on the uppermost layer can be completely separated from the disc-shaped weights on the uppermost layer.

In an optimal mode, one end of one of the code pulling rods is provided with a grating unit which is composed of a light blocking sheet and a photoelectric sensor and is used for measuring the rotating position of the code pulling rod by a grating principle so as to determine the loading state of the disc-shaped weight.

Preferably, the vertical driving unit comprises an intermediate plate driven by the driving assembly to move up and down; each code pulling rod penetrates through the middle plate through one bearing and is vertically and relatively fixed with the middle plate through a positioning component.

Preferably, the inner side of the encircling toothed belt wheel is supported outwards outside the disc-shaped weight through a toothed belt idler wheel.

The disc-shaped weight loading mechanism has the characteristics of flexible operation, compact structure and moderate cost.

Drawings

Fig. 1 is a schematic diagram of the arrangement structure of the weights of the combined weight loading mechanism.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is an enlarged schematic view of B in fig. 1.

Fig. 4 is a schematic diagram illustrating the dimensions of the cartridge weight in the combination weight loading mechanism.

Fig. 5 is a schematic view of the overall structure of the combined weight loading mechanism.

Fig. 6 is a schematic view of the weight loading principle of the combined weight loading mechanism.

Fig. 7 is a schematic structural diagram of the loading guide principle of the combined weight loading mechanism.

Fig. 8 is a schematic structural diagram of the disc-shaped weight in a top view in a loading state.

Fig. 9 is a structural schematic diagram of a first state in which three tension rods are used for realizing loading of three disc-shaped weights.

Fig. 10 is a structural schematic diagram of a second state in which three code pulling rods are used for realizing loading of three disc-shaped weights.

Fig. 11 is a structural schematic diagram of a third state in which three tension rods are used for realizing loading of three disc-shaped weights.

Fig. 12 is a structural schematic diagram of a fourth state in which three tension rods are used for realizing loading of three disc-shaped weights.

Fig. 13 is a schematic structural diagram of the three code pulling rods in the top view for realizing the loading of the three disc-shaped weights in fig. 8.

FIG. 14 is a side view of the code bar of FIG. 13.

FIG. 15 is a top view of the top of the tension rod of FIG. 13.

Fig. 16 is a schematic structural diagram in a top view of four code rods for realizing the loading of four disc-shaped weights.

FIG. 17 is a side view of the code bar of FIG. 16.

Fig. 18 is a schematic structural diagram of the top view of five code pulling rods for loading five disc-shaped weights.

FIG. 19 is a side view of the track rod of FIG. 18.

Fig. 20 is a schematic diagram of the principle of the device for blowing the tray weights by air nozzles.

Fig. 21 is a state diagram in which the tray weight is rotated counterclockwise.

Fig. 22 is a state diagram of the tray weight rotating clockwise.

Fig. 23 is a diagram showing a structure of a grating arrangement.

Fig. 24 is an enlarged view of a portion of fig. 21 within the circle.

Fig. 25 is an enlarged view of a portion of fig. 22 within the circle.

Fig. 26 is a diagram of another grating arrangement.

Fig. 27 is a schematic structural diagram of the arrangement principle of the peripheral guide drive in the combined weight loading mechanism of the present invention.

Fig. 28 is a supplementary structural view of the guiding driving arrangement principle of fig. 27.

Fig. 29 is a schematic diagram of the elevated state of fig. 28.

Fig. 30 is a schematic view of the structure of fig. 28 and 29 further illustrating the state of maintenance.

Fig. 31 is a schematic view showing the arrangement of the bottom lower plate in the combination weight loading mechanism of the present invention.

Detailed Description

The combined weight loading mechanism shown in fig. 1, 7 and 27-31 comprises a piston weight 31 connected with a lower piston rod 92 for weighing or pressure calibration; the upper part of the piston weight 31 is hung at the center of the upper cylinder opening of the cylindrical hanging basket weight 33; the radial annular weight tray 23 is connected to the outer side of the bottom of the barrel wall of the hanging basket weight 33, and the annular disc-shaped weights 22 arranged in a stacked mode are borne on the weight tray 23. The upper part of the piston weight 31 is also connected with a tray weight 34 positioned above the hanging basket weight 33 through a connecting structure; the tray weight 34 is provided with a set of nested tubular weights 20. The disc-shaped weight 22 is provided with a disc-shaped weight loading and unloading unit. The tubular weight 20 is provided with a tubular weight loading and unloading unit.

The tubular weight loading mechanism (tubular weight loading and unloading unit) refers to chinese patent 201410229031.4, which discloses a driving mechanism for driving weights to move up and down in a freely combined automatic code adding device. The patent is also an automatic code adding device used in the field of pressure detection, and comprises a group of sleeved cylindrical weights, wherein the upper end of each layer of the weights is provided with a driving mechanism for driving the weights to move up and down; and a weight tray of a weighing or pressure detection mechanism is attached to the lower part of the weight. The height of the weight is gradually reduced from inside to outside; and a supporting groove is formed on the exposed cylindrical surface at the upper end of each weight, and a supporting rod, an inner ring, a middle ring and an outer ring are correspondingly arranged.

In an optimal mode, the arrangement mode of the tubular weight and the loading mechanism thereof is as follows:

the tubular weight comprises a group of tubular weights 20 which are sleeved, and the upper end of each layer of the tubular weight 20 is provided with a driving mechanism for driving the tubular weight 20 to move up and down; a tray weight 34 for weighing or pressure detection is arranged below the cylindrical weight 20; the height of the tubular weight 20 is gradually reduced from inside to outside; the outer cylindrical surface of the upper end of each cylindrical weight 20 is provided with a supporting projection 91.

The tubular weight's actuating mechanism includes corresponding each tubular weight 20 supports a set of level flexible vaulting pole 27 that sets up at the interval on the protruding 91 circumference, and each group vaulting pole 27 is 3 at least. The rear part of each support rod 27 is connected with a support rod driving cylinder 24; each spreader bar drive cylinder 24 is secured to a spreader tower 25 that is vertically driven by a tension weight cylinder 98. The support tower 25 is arranged in a tower-shaped structure corresponding to the top of the tubular weight 20.

The disc-shaped weight loading and unloading unit can be realized by a supporting unit of a sequential code adding device in Chinese patent CN201410227718.4 or similar integral reference. The loading and unloading part of an automatic sequential code adding mechanism in Chinese patent CN201710373500.3 can also be selected.

Chinese patent CN201410227718.4 discloses a sequential stacking device, which comprises a supporting plate with a lifting mechanism at the bottom, wherein disc-shaped weights are stacked on the supporting plate through a supporting unit; a flange is formed at the edge of each layer of weights and is inversely suspended and lapped on the supporting part of the supporting unit; the arrangement relation between two adjacent layers meets the requirement that interference cannot occur during loading. In addition, a weight tray of a weighing or pressure detection mechanism is additionally arranged between the bottom-most weight and the supporting plate. Chinese patent CN201710373500.3 discloses an automatic sequential stacking mechanism, which comprises a plurality of disc-shaped weights, a weighing part and a loading and unloading part. The weighing part comprises a weighing tray; the loading and unloading part comprises a support column assembly; each support column component comprises a support column of which the lower rod section is a polished rod section, a sleeve sequentially sleeved on the polished rod section, and an elastic body supported between the support column and the sleeve; the upper rod section of the support column and the outer part of the sleeve are axially provided with convex support steps at intervals, and the lower end of the light rod section of the support column is fixed on a lifting platform which is horizontally arranged and driven by a driving mechanism to lift; each sleeve is provided with an external support for limiting its descent to the lowest position.

In an optimal mode, the arrangement mode of the invention adopted by the disc-shaped weights and the loading and unloading units thereof is as follows:

the disc-shaped weights comprise a plurality of stacked disc-shaped weights 22 with flanges at the edges, a weighing part and a loading and unloading part; the weighing section includes a weight tray 23 for holding the disc-shaped weight for weighing.

The loading and unloading part (disc-shaped weight loading and unloading unit) comprises at least three code pulling rods 16 with the same structure, which are distributed on the periphery of the disc-shaped weight 22 in a concentric direction; the plurality of the tension rods 16 are respectively and synchronously connected with vertical driving units which move up and down in a mode of rotating around the axes of the tension rods. As shown in fig. 8, each code bar 16 is connected by a fixed toothed pulley 15 to a toothed belt 14 that encircles the entire code bar 16 and the outside of the disc-shaped weight 22. The inner side of the toothed belt wheel 15 which surrounds it is supported outwards by means of a toothed belt idler 36 on the outside of the disc-shaped weight 22.

As shown in fig. 9 to 19, the code rod 16 is provided with a radially outward overlapping convex disk 95 corresponding to the flange of each layer of the disc-shaped weights 22 in the axial direction.

As shown in fig. 9 to 12, 16, and 18, the overlapping surface (as shown in fig. 6) of the overlapping convex plate 95 of each layer and the flange of the disc-shaped weight 22 gradually increases in the direction from bottom to top of the stack rod 16, so that the stack rod 16 rotates for one circle, and the overlapping convex plates 95 of each layer and the disc-shaped weight 22 are sequentially separated from each other. Specifically, as shown in fig. 9 to 12, 16, and 18, and in combination with fig. 14, 17, and 19, structures in which three overlapping convex plates 95 are engaged with three discoid weights 22, four overlapping convex plates 95 are engaged with four discoid weights 22, and five overlapping convex plates 95 are engaged with five discoid weights 22 are shown. Fig. 9-12, three overlapping flanges 95 and three disc-shaped weights 22, as the code bar 16 rotates, show different overlapping positions.

According to the above description, one end of each code bar 16 is further provided with a code bar angle control device 10 for driving the code bar to rotate around the axis. The vertical driving unit of the invention comprises an intermediate plate 7 which is driven by a driving component to move up and down; each tension rod 16 is arranged through the middle plate 7 through a bearing 13 and is fixed with the middle plate 7 in a vertical direction through a positioning part.

Further, "faying surface" is specifically described. The disc-shaped weight 22 is a disc-shaped body, and the overlapping surface is a sector surface from the contact to the separation of the disc-shaped weight 22 and each layer of the overlapping convex disc 95, and the size of the sector surface can be determined by the angle of the sector surface of the disc. Preferably, the overlapping cam 95 is shown as an incomplete disk about the axis of the stacking bar 16; in order to ensure the loading of the disc-shaped weights on the uppermost layer, the overlapping convex disc 95 on the uppermost layer is completely lacked relative to the disc surface in the direction of one side part of the stacking rod 16, so that the overlapping convex disc on the uppermost layer can be completely separated from the disc-shaped weights on the uppermost layer.

As shown in fig. 15, one end of one of the code rods 16 is provided with a grating unit which is composed of a light blocking sheet 11 and a photoelectric sensor 12 and measures the rotation position of the code rod 16 by the grating principle so as to determine the loading state of the disc-shaped weight 22.

Preferably, as shown in fig. 1, the contact surface of the piston weight 31 and the upper cylinder mouth of the basket weight 33 is aligned in a conical surface; the weight tray 23 of the hanging basket weight 33 is aligned with the disc-shaped weights 22 and the conical surfaces at the inner openings between two adjacent disc-shaped weights 22. Each cylindrical weight 20 and the tray weight 34 are matched with each other in an annular conical surface; optimally, the disc surface of the tray weight 34 is provided with grooves with annular conical surfaces at two sides, and the two annular conical surfaces are respectively aligned with the lower end surfaces of the two adjacent tubular weights 20.

The frame and lifting structure of the present invention is shown in fig. 27-31. The piston weight 31, the disc weight 22, and the cylindrical weight 20 are provided with vertically upward-pushing cylinders 99 in a peripheral symmetry, and are provided with a plurality of vertically oriented optical axes 4. As shown in fig. 31, the optical axis 4 and the upper ceiling cylinder 99 are placed on the lower plate 9. As shown in fig. 27-30, the middle part of the optical axis 4 is penetrated with the middle plate 7 connected by the linear bearing 5, and the top part is connected with the upper plate 8; the middle plate 7 and the upper plate 8 are fixed into a whole by a middle connecting unit and are integrally fixed on the top of a piston mandril 89 of the upper jacking cylinder 99. The upper plate 8 is used as a driving component of the tubular weight 20 for driving the weight to move up and down and is connected with a code supporting tower 25; the intermediate plate 7 serves as the active part of the vertical drive unit for the disc-shaped weights 22, to which the tension rod 16 is connected.

The disc-shaped weight loading and unloading unit comprises an intermediate plate 7 which is driven by a driving component to move up and down; each code bar 16 penetrates through the middle plate 7 through a bearing 13 and is vertically fixed relative to the middle plate 7 through a positioning component.

The tubular weight loading and unloading unit includes an upper plate 8 that fixes the weight pulling cylinder 98 and the support tower 25. The middle plate 7 and the upper plate 8 are connected by a pull weight cylinder 98 and a support tower 25.

The code supporting tower 25 is connected with the middle plate 7 through a connecting screw 88, the code supporting tower 25 is connected with a weight pulling cylinder 98 through a connecting screw 87, and the upper plate 8 is connected with the weight pulling cylinder 98 through a connecting screw 96. In normal work, the weight pulling cylinder 98 can pull the code supporting tower 25 to drive the middle plate 7 to move up and down. When the middle plate 7 needs to be jacked up, the connecting screw 93 is unscrewed, so that the upper plate 8 is separated from the guide optical axis 4, and the piston mandril 89 of the upper jacking cylinder 99 jacks the upper plate 8 to drive the code pulling rod angle control device 10, namely the code supporting tower 25 part and the middle plate 7 to move upwards along the guide optical axis 4.

When the weights are arranged, the piston weights are located at the approximate center, tray weights and hanging basket weights are arranged on the piston weights, tubular weights are arranged on the tray weights, and disc-shaped weights are arranged on the hanging basket weights. The whole body is in an arrangement mode that the cylindrical weight is arranged at the upper part and the disc-shaped weight is arranged at the lower part. The cylindrical weights are not affected each other during loading, so that the weight of the weights can be freely combined and loaded, and the weights above the disc-shaped weights need to be pressed on the weights below the disc-shaped weights during loading, so that the weight of the weights can be sequentially combined and loaded. The weight free combined loading under the heavy weight condition is realized through the combined loading of the cylindrical weight and the disc-shaped weight.

The upper portion of the cylindrical weight is provided with a flange, the lower portion of the flange is provided with a telescopic support rod, one end, close to the flange, of the support rod can stretch into the lower portion of the flange of the cylindrical weight, the cylindrical weight is subjected to lifting operation at the upper position and the lower position, and loading and unloading of the cylindrical weight are achieved. The outer side of the upper part of the disc-shaped weight is provided with a flange, the lower part of the flange is provided with a code pulling rod with a changeable position, and the code pulling rod can extend into the lower part of the flange of the disc-shaped weight on different layers to control the sequential loading and unloading of the weights on different layers.

The tubular weight lower part is equipped with the conical surface (interior conical surface or the external conical surface), and the corresponding position also is equipped with the conical surface (the tubular weight is interior conical surface, and then the corresponding position on the tray weight sets up the external conical surface, and the tubular weight is the external conical surface, and then the corresponding position on the tray weight sets up interior conical surface) with the corresponding complex of tubular weight to realize the accurate positioning of tubular weight, guarantee simultaneously that the weight does not take place the offset at the rotation in-process. The inner sides of the upper part and the lower part of the disc-shaped weights are provided with inner conical surfaces or outer conical surfaces, if the lower side of a certain weight adjacent to the upper layer of weights is an inner conical surface, the upper side of the layer of weights is an outer conical surface, and vice versa; if the upper side of a certain weight adjacent to the lower layer of weight is an inner conical surface, the lower side of the weight of the layer is an outer conical surface, and vice versa. The conical surface ensures the accuracy of the position of the weight pan in the loading and unloading process and no position deviation in the rotating process. Piston weight upper portion sets up the step cylinder, and tray weight lower part sets up matched with step cylinder with it, if what set up on the piston weight is outer cylinder, then be interior cylinder on the tray weight, if what set up on the piston weight is interior cylinder, then be outer cylinder on the tray weight, through the cooperation between the cylinder realization the two accurate positioning. The outer edge of the piston weight is provided with an outer conical surface, the inner side of the hanging scaffold weight is provided with an inner conical surface matched with the piston weight, and the outer conical surface and the inner conical surface are accurately positioned. The upper surface of the disc at the lower part of the hanging scaffold weight is provided with an inner conical surface or an outer conical surface corresponding to the conical surface of the disc weight adjacent to the upper surface so as to realize accurate positioning between the disc weight and the hanging scaffold weight.

The tray weight, the hanging basket weight and the piston weight are only one, and the cylindrical weight and the disc weight are multiple.

The disc-shaped weights are of a split structure in a stacked mode layer by layer, and inclined planes are arranged on the upper side of the inner side of the lower-layer weight and the lower side of the outer side of the upper-layer weight to guarantee positioning. The split weight has the advantage of reducing the requirements of instruments and equipment when the weight is calibrated. The positioning of the weight in the device of the invention can be replaced by conical surfaces with different shapes and angles or other modes.

The upper plate 8, the optical axis 4, the middle plate 7, the lower plate 9, the support tower 25, the fixed sleeve or the linear bearing 3, the linear bearing 5 and the supporting leg 1 form a frame of the device; the cylindrical weight 20, the tray weight 34, the disc-shaped weight 22, the hanging basket weight 33 and the piston weight 31 form a weight load system of the device; the code pulling rod angle control device 10, the linear bearing 13, the toothed belt 14, the toothed belt wheel 15, the toothed belt idler wheel 36, the code pulling rod 16, the code supporting rod driving cylinder 24 and the code supporting rod 27 form a control mechanism for loading and unloading weights of the device; the belt 17, the belt pulley 18, the motor 19 and the air blowing column 28 form a weight rotation driving system of the device; the light barrier 11, the photoelectric sensor 12, the sensor support frame 30, the distance sensor 29 and the speed sensor 37 form an action position detection mechanism of the device; the upper jacking cylinder 99 and the connecting column 26 form a convenient operating mechanism for weight maintenance of the device.

The upper plate 8, the optical axis 4, the fixed sleeve or the linear bearing 3 and the lower plate 9 are fixedly connected, the middle plate 7 and the support tower 25 are fixedly connected, and the middle plate 7 can slide up and down along the optical axis 4 through the linear bearing 5; the upper plate 8 and the code supporting tower are connected through the weight pulling cylinder 98, the code supporting tower 25 can be driven to drive the code supporting rod 27 through the movement of the weight pulling cylinder 98, the cylindrical weight can move up and down to perform the loading and unloading actions of the cylindrical weight, and meanwhile, the code supporting tower 25 can be driven to drive the middle plate 7 to drive the code pulling rod 16 to move up and down, so that the disc-shaped weight can move up and down to perform the loading and unloading actions of the disc-shaped weight.

And a code supporting rod arranged on a code supporting tower 25 drives the air cylinder 24 to drive the code supporting rod 27 to move in a telescopic mode along the horizontal direction, so that the relative position of the code supporting rod and a flange of the cylindrical weight is controlled, and the action control of different cylindrical weights is realized. According to the height of the cylindrical weight, a plurality of layers of code supporting rods 27 are arranged, and on the same layer, a plurality of code supporting rods 27 are arranged, and generally not less than 3.

The incomplete disc of multilayer is provided with to the 16 lower parts of code pulling rod, has the disc step of breach promptly, when code pulling rod 16 was rotatory around its self axis, the incomplete disc breach of different layers and disc-shaped weight flange were located different relative position, and the code pulling rod is driven and is rotated by code pulling rod angle controlling means 10, makes the bulge of incomplete disc above that be in different positions and stretches into the disc-shaped weight 22's of different layers flange lower part, realizes different disc-shaped weight's action control. A plurality of disc-shaped weights are stacked on the hanging basket weight 33, and a plurality of cylindrical weights are annularly sleeved on the tray weight 34 to realize loading. A plurality of code pulling rods 16 are arranged on the middle plate 7 through linear bearings 13, generally not less than 3 code pulling rods are arranged, one code pulling rod 16 is connected with the code pulling rod angle control device 10 and can be driven by the code pulling rod angle control device, each code pulling rod 16 is provided with a toothed belt wheel, a plurality of code pulling rods are connected and linked through the toothed belts, and incomplete discs on different code pulling rods are guaranteed to be located at positions symmetrical along the center of the weight. The toothed belt is tensioned by the provision of a toothed belt idler 36.

As shown in fig. 20-26, the blowing nozzles are arranged around the tray weight, the wind blocking holes are arranged at the upper edge of the tray weight, and when the rotating speed is insufficient, the tray weight is blown by air pressure to increase the rotating speed. When the pressurizing system is loaded, the pressure jacking piston drives the tray weight to jack the weight, and the weight tray drives the weight to start rotating under the action of the friction ring. Set up the sensor in tray weight below, real-time measurement tray weight rotational speed, after the rotational speed is less than the rotational speed of friction ring, control system control air cock blows to the tray weight, make tray weight rotational speed increase, guarantee like this that the weight rotational speed reaches or surpasss the minimum of corresponding standard regulation all the time, unload or load when the weight, when needing tray weight and friction ring contact, the tray weight is close with the rotational speed of friction ring, the wearing and tearing that the relative motion speed difference produced the friction and probably lead to have been avoided, when using for a long time with the improvement instrument, measurement accuracy's stability.

Specifically, the hydraulic medium in the cylinder 35 pushes the piston weight 31, so as to drive the loaded weight to jack up and suspend. When the piston was not by jack-up, terminal surface and friction ring 32 up end contact under the piston weight 31, friction ring 32 drives piston weight 31 and drives other weights rotatory, when piston weight 31 was by jack-up, loaded tube-shape weight and disc weight, hanging flower basket weight, piston weight and tray weight rely on inertia to continue to rotate, under some circumstances, when relying on inertia not enough to maintain the weight and continuously rotate, set up the gas column 28 and drive the weight to keeping rotatory as independent power supply. The friction ring 32 is rotated by means of a motor 19 connected to the base plate.

The floating and rotating processes of the code disc are as follows: when the pressure of the hydraulic medium in the oil cylinder 35 is sufficient, the piston weight 31 is pushed, and the loaded weight is driven to jack up and suspend. When piston weight has not been by jack-up yet, terminal surface and friction ring 32 up end contact under the piston weight 31 outside, motor 19 drives belt 17 through the belt pulley and drives the friction ring again and pass through frictional force and drive piston weight 31 and other weights rotatory, and when piston weight 31 was by jack-up, loaded tube-shape and disc weight, hanging flower basket weight, piston weight and tray weight rely on inertia to continue to rotate. The air blowing column 28 is arranged to be used as an auxiliary power source to blow air to the tray weight, and under the condition that no external mechanical friction force acts on the weight system, when the rotating inertia of the weight is not enough to maintain the weight to rotate continuously, the weight can rotate continuously.

Fig. 20 includes an air pressure controller 83, a pressurizing device 84, a control device 85, and a compression nut 81.

Tray weight 34 supports on piston weight 31, places the weight on the tray weight 34, and when tray weight 34 was not by jack-up, piston weight 31 contacted with lower part friction ring 32, when the piston received pressure by jack-up, tray weight 34 and on it the weight can together be by jack-up, tray weight 34 and friction ring 32 break away from the contact. A plurality of air nozzles are symmetrically arranged along the circumference of the tray weight, and the included angle between the air outlets of the air nozzles and the tray weight is alpha (alpha is more than or equal to 0 and less than or equal to 90). When the tray weight rotates anticlockwise, the included angle of the tray weight is shown in fig. 21, and when the tray weight rotates clockwise, the included angle of the tray weight is shown in fig. 22. An electromagnetic valve is arranged between the air tap and the air source and is controlled by a control system. A speed sensor 37, preferably a photoelectric sensor, is arranged at the lower part of the tray weight 34, and a pattern coating (such as stripes and the like shown in figures 23 and 26) with two colors alternately is arranged on one side of the lower part of the tray weight 34, which faces the sensor, and is used for sensing a speed signal of the speed sensor, wherein the number of the patterns is more than or equal to 1.

In the use process, when the tray weight 34 is not jacked up, the piston weight 31 integrated with the tray weight 34 is contacted with the lower friction ring 32, the friction ring 32 is rotated by external force, and the tray weight 34 is driven to rotate by the friction ring 32. When the piston is pressed to jack up, the tray weight 34 and the weight on the tray weight are jacked up together, the piston weight 31 is separated from contact with the friction ring, and the rotation motion is maintained by inertia. When the inertia is insufficient, the rotating speeds of the tray weight 34 and the weight are reduced, the rotating speeds are sensed by the speed sensor and transmit signals to the control system, the control system controls the electromagnetic valve, the air blowing column 28 blows air to the tray weight 34, the rotating speed of the tray weight is accelerated, and the blowing is stopped after the rotating speed reaches the preset speed. In the whole process, all the air nozzles have the same radial included angle with the weight of the tray, the stress is uniform, the speed is accelerated, and the balance state of the weight tray and the weight is not broken.

The code bar angle control device 10 can be controlled by a stepping motor, a servo motor or a rotary cylinder.

Set up the barn door 11 on one of them sign indicating number pole, drive the barn door and rotate when drawing the sign indicating number pole and rotate, set up a plurality of photoelectric sensor 12 around the barn door, when drawing the sign indicating number pole and rotating to different positions, photoelectric sensor 12 can the perception of its position to know the sign indicating number pole angle, can know which disc weight is being added the uninstallation operation, thereby be used for realizing automatic measurement.

Two sensor holders 30 are provided, one for fixing the distance sensor 29 and the other for fixing the speed sensor 37. The height position of the code tray is measured by the distance sensor 29, and the weight rotation speed is measured by the speed sensor 37. The sensor support 30 is mounted on a slideway fixedly connected with the bottom plate (the slideway can be independently arranged, and can also be a groove on the outer vertical surface of the cylinder). The distance sensor 29 may be implemented as a hall sensor, and the speed sensor may be implemented as a photoelectric sensor, and a coating layer (or an adhesive layer) having different colors may be provided on the lower surface of the pallet.

The working process of the device mainly comprises the following steps: the weight loading process, the unloading process of all weights, the floating and rotating process of the code supporting disc and the process of putting the weights into and taking the weights out of the device.

And (3) loading the weight: the piston weight 31 and the tray weight 34 are always in a loaded state. The loading of the tubular weight 20, all the tubular weight 20 are put on the tray weight 34 initially, the code bar drives the cylinder 24 to move, so that the connected code bar 27 is driven to extend to the lower part of the weight flange corresponding to the non-loaded tubular weight, the weight cylinder 98 is pulled to move, the weight to be unloaded is lifted to realize the unloading of the tubular weight, and the non-unloaded weight is the loaded weight. The loading of disc weight 22 and hanging flower basket weight 33, all disc weights 22 are put on hanging flower basket weight 33 at the beginning, control the turned angle of code bar 16, will draw incomplete disc bulge below the code bar to change to not loading disc weight or hanging flower basket weight 33's flange below, draw the action of weight cylinder 98, will lift the weight that will unload and realize the uninstallation of weight, the weight that does not uninstall is loaded weight promptly.

Unloading process of all weights: stretch out all vaulting pole 27 to corresponding weight flange lower part, simultaneously, control draws the yardage pole turned angle and will draw incomplete disc bulge in yard pole below to turn to all weight flange belows, draws the action of weight cylinder 98, drives all weights and upwards lifts up, uninstalls all weights.

The process of putting weights into and taking weights out of the device: when the weight needs to be detached from the device for weight detection and other operations, the rotating angles of the code supporting rod driving cylinder 24 and the code pulling rod 16 are controlled, so that all the weights are in a loading state, namely the tubular weight 20 is in contact with the tray weight 34, and the disc-shaped weight 22 is in contact with the hanging basket weight 33. The upper plate 8 and the optical axis 4 are disconnected, the upper jacking cylinder 99 moves, the upper plate 8 is jacked to drive the code supporting tower 25 and the middle plate 7, and then the code pulling rod 16 is driven to integrally move upwards, so that all weights are exposed, and the weights can be conveniently placed in and taken out.

The principle of the invention is shown in the figures. The device adopts a preferred mode of pneumatic driving for a middle pull weight cylinder 98, a brace rod driving cylinder 24 and an upper jacking cylinder 99, but can be realized by a screw nut mechanism, a hydraulic oil cylinder mechanism, an electromagnetic driving mechanism or other mechanisms capable of realizing linear motion. The power device can be correspondingly an air pump, an electric motor, a hydraulic motor and the like. The distance sensor 29 and the speed sensor 37 are disposed below the bottom of the tray weight 34, and may be disposed above the tray weight 34 or in other locations instead. The pull weight cylinder 98 is disposed above the support tower 25, and the pull weight cylinder 98 may be disposed on the top plate 8, or may be replaced in other ways and locations that allow relative movement between the support tower 25 and the top plate 8. In the figure, 6 tubular weights are arranged, 6 layers of corresponding code supporting towers are arranged, and 3 code supporting rods are arranged on each layer. In practice, N tubular weights can be arranged according to needs, the number of layers of the code supporting tower can be more than or equal to N, and the number of the corresponding code supporting rods on each layer is more than or equal to 2. Under preferred mode, the disc weight quantity is 3, and it is 3 to set up incomplete disc step quantity on every code bar, and code bar quantity is 3. In practice, N disc-shaped weights can be arranged according to needs, the number of the incomplete disc steps of each code pulling rod is more than or equal to N layers, and the number of the code pulling rods is more than or equal to 2. The rotation angle of the code pulling rod is controlled by a position sensor, and 3 weights correspond to 4 position sensors. If N weights are arranged, N +1 position sensors are needed to sense the rotation angle of the code pulling rod, and therefore loading and unloading substitution of the disc-shaped weights is achieved. The position sensor is preferably a photoelectric sensor, but other sensors can be used instead. The toothed belt 14 and the toothed pulley 15 may be provided below the linear bearing 13 or may be provided above the linear bearing 13.

The supporting leg 1 is fixed with a lower plate 9, a linear bearing 3 is arranged on the lower plate 9, the linear bearing 3 is used for positioning the guide optical axis 4, and a guide sleeve or a fixed sleeve can be selected. The lower plate 9 and the upper plate 8 are connected through the guide optical axis 4, the middle plate 7 is connected with the linear bearing 5, and the linear bearing 5 can move up and down on the guide optical axis 4. An upper ejection cylinder 99 is installed between the lower plate 9 and the upper plate 8, and a cylinder piston (piston ejector 89) and a cylinder body are connected to the lower plate 9 and the upper plate 8, respectively.

When the upper plate 8 and the weight loading and unloading device need to be lifted, the screw 93 between the fixed upper plate 8 and the guide optical axis 4 is unscrewed, the upper jacking cylinder 99 moves, the upper plate 8, the weight loading and unloading device 80 and the middle plate 7 are jacked up, the spring pin 6 is arranged on the connecting sleeve outside the linear bearing 5, the annular groove is formed in the guide optical axis 4, the upper jacking cylinder 99 jacks the upper plate 8, when the weight loading and unloading device 80 and the middle plate 7 are jacked up, the spring pin 6 is inserted into the annular groove of the guide optical axis 4, or the annular groove is not formed, the spring pin 6 is directly arranged on the upper end face of the linear sliding rail 4 and is abutted against the upper end face, so that the upper plate 8 suddenly drops when the upper jacking cylinder 99 is suddenly out of gas, and the personal safety of an operator when the weight is taken out and put in is guaranteed. The principle of the invention is shown in the figures. The jacking cylinder can be realized by a screw rod nut mechanism, a hydraulic oil cylinder mechanism, an electromagnetic driving mechanism or other mechanisms capable of realizing linear motion.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims

1. A disc-shaped weight loading mechanism comprises a plurality of stacked disc-shaped weights (22) with flanges at the edges, a weighing part and a loading and unloading part; the weighing part comprises a weight tray (23) for supporting the disc-shaped weight to weigh; it is characterized in that the preparation method is characterized in that,

the loading and unloading part comprises at least three tension rods (16) with the same structure, which are vertically arranged and distributed on the periphery of the disc-shaped weight (22); the plurality of code pulling rods (16) are respectively and synchronously connected with a vertical driving unit which moves up and down in a mode of rotating around the axis of the code pulling rods;

the stacking rod (16) is provided with a lapping convex disc (95) with a radial flange corresponding to the flange of each layer of the disc-shaped weights (22) in the axial direction, the lapping surface of the lapping convex disc (95) of each layer and the flange of the disc-shaped weights (22) is gradually enlarged from bottom to top along the direction of the stacking rod (16), so that the lapping convex discs (95) of each layer from bottom to top are separated from the lapping of the disc-shaped weights (22) and the lapping convex discs (95) of each layer one by one from the beginning of the complete lapping of the disc-shaped weights (22) and the lapping convex discs (95) of each layer to the rotation of the stacking rod (16) for one circle;

each code pulling rod (16) is connected with a toothed belt (14) which surrounds all the code pulling rods (16) and the outer sides of the disc-shaped weights (22) through a fixed toothed belt wheel (15);

one end of one code pulling rod (16) is provided with a code pulling rod driving unit (10) for driving the code pulling rod (16) to rotate around the axis;

one end of one of the code pulling rods (16) is provided with a grating unit which measures the rotating position of the code pulling rod (16) by a light blocking sheet (11) and a photoelectric sensor (12) according to the grating principle so as to determine the loading state of the disc-shaped weight (22);

the inner side of the encircling toothed belt wheel (15) is supported outwards outside the disc-shaped weight (22) through a toothed belt idler wheel (36);

the weight tray (23) is positioned in a radial ring shape connected with the outer side of the bottom of the cylinder wall of the hanging basket weight (33), and the upper part of the piston weight (31) is hung at the center of the upper cylinder opening of the hanging basket weight (33); the upper part of the piston weight (31) is also connected with a tray weight (34) positioned above the hanging basket weight (33) through a connecting structure;

a weight rotation driving system is composed of a belt (17), a belt pulley (18), a motor (19) and an air blowing column (28); the blowing column (28) is located on the outer side of the tray weight (34), the blowing column (28) blows air to the tray weight (34) to accelerate the rotating speed of the tray weight, and after the rotating speed reaches a preset speed, blowing is stopped.