CN220961059U - Weight grading mechanism of dead weight type hardness standard machine - Google Patents
Weight grading mechanism of dead weight type hardness standard machine Download PDFInfo
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- CN220961059U CN220961059U CN202322610707.1U CN202322610707U CN220961059U CN 220961059 U CN220961059 U CN 220961059U CN 202322610707 U CN202322610707 U CN 202322610707U CN 220961059 U CN220961059 U CN 220961059U
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Abstract
A weight grading mechanism of a dead weight hardness standard machine, comprising: a frame, three weight grading loading mechanisms, a rotary driving mechanism, a weight lifting mechanism, weight components and a controller; the three weight grading loading mechanisms are uniformly distributed in the rack at intervals; each weight stage loading mechanism includes: the device comprises an upper end bearing, a weight selection column, a plurality of weight support rods, a clamp spring, a driven sprocket and a lower end bearing; a plurality of through holes are uniformly and spirally arranged on the weight selection column from top to bottom at intervals according to the set weight progression; one end of the weight supporting rod is provided with a step surface to be inserted into the through hole, and the other end of the weight supporting rod is fixed through the clamp spring. The utility model has the advantages of simpler structure, convenient maintenance, low manufacturing cost and multiple test force conversion stages.
Description
Technical Field
The utility model belongs to the technical field of hardness machine detection, and particularly relates to a weight grading mechanism of a dead weight type hardness standard machine.
Background
Along with the development of science and technology, more and more fields put higher demands on the quality of products. In the field of mechanical metering, the Rockwell hardness tester is widely applied and is mainly used for testing the hardness of various steels (alloy-containing steel and stainless steel). The usage units must be calibrated regularly according to the certification protocol requirements.
In terms of the current domestic and foreign situations, the Rockwell hardness tester has a wide variety of products, but the hardness standard machine is fresh and has. At present, the top of the standard hardness machine produced in China adopts a ball spline bearing, the friction force on a lifting main shaft is large and uncertain, the main shaft can also be worn after long-term use, the precision is influenced, and meanwhile, the uncertainty of errors is introduced.
In addition, the test force changing device of some hardness standard machines still adopts manual spanner structure, when examining different hardness blocks, needs to select different loads according to the type of hardness block, adopts manual spanner structure's hardness standard machine to need the examination personnel to open main part cabinet door, and the manual spanner handle changes the load, wastes time and energy, and work efficiency is lower.
The Chinese patent 201810199167.3 discloses a dead weight Rockwell hardness machine adopting a spiral weight grading loading technology, wherein a supporting mechanism of weights is a fan-shaped supporting block, and the specification does not describe how to design the fan-shaped supporting block to make the weights not suitable for interference in grading or the number of layers of weight grading is limited; chinese patent 202022602410.7 discloses a three-column type weight stable loading mechanism and a dead weight Rockwell hardness machine with the same, wherein a weight bearing mechanism is an annular supporting block, and the specification does not describe how to design the annular supporting block to realize weight classification.
Disclosure of utility model
The utility model aims to solve the technical problem of providing a weight grading mechanism of a dead weight type hardness machine with a simple structure, which can realize a plurality of stages of test force conversion and can realize ten stages or more stages of test force conversion.
The utility model is realized in the following way:
A weight grading mechanism of a dead weight hardness standard machine, comprising: a frame, three weight grading loading mechanisms, a rotary driving mechanism, a weight lifting mechanism, weight components and a controller;
the three weight grading loading mechanisms are uniformly distributed in the rack at intervals;
Each weight grading loading mechanism comprises: the device comprises an upper end bearing, a weight selection column, a plurality of weight support rods, a clamp spring, a driven sprocket and a lower end bearing; the weight selection column is uniformly and spirally provided with a plurality of through holes at intervals from top to bottom according to the set weight series; one end of the weight supporting rod is provided with a step surface to be inserted into the through hole, and the other end of the weight supporting rod is fixed through the clamp spring; a photoelectric switch induction plate is arranged above the driven sprocket of one weight grading loading mechanism;
The rotary driving mechanism and the photoelectric switch induction plate are both connected with the controller;
The rotary driving mechanism is connected with the driven chain wheel and drives the three weight grading loading mechanisms to rotate through the driven chain wheel;
The angle of each poking piece on the photoelectric switch induction plate is consistent with the angle of each through hole, so that the controller receives signals sent by the photoelectric switch induction plate and controls the rotary driving mechanism to enable the weight support rod to accurately reach the corresponding position;
The weight lifting mechanism is arranged in the frame, the weight assembly is arranged on the weight lifting mechanism in a superposition mode, and the weight lifting mechanism drives the weight assembly to lift.
Further, each weight grading loading mechanism is provided with nine weight supporting rods, wherein the angles are distributed according to 360 °/(9+1) =36°, and ten-level test force conversion is achieved.
Further, the rotation driving mechanism includes: a servo motor, a driving sprocket, a chain and a plurality of tensioning wheels; the servo motor is connected with the driving sprocket, the driving sprocket is connected with the driven sprocket through the chain, and the tensioning wheels are arranged on the outer side of the chain.
The utility model has the advantages that:
1. the structure is simpler, the maintenance is convenient, and the manufacturing cost is low;
2. The number of the test force conversion stages is increased, and ten or more stages of test force conversion can be realized.
Drawings
The invention will be further described with reference to the accompanying drawings, in conjunction with examples.
Fig. 1 is a schematic perspective view of the present utility model (with the weight lifting mechanism removed).
Fig. 2 is a front view of fig. 1.
Fig. 3 is a cross-sectional view A-A of fig. 2.
Fig. 4 is a schematic structural view of a weight-classifying loading mechanism with a photoelectric switch sensing plate in the utility model.
Fig. 5 is a front view of fig. 4.
Fig. 6 is a top view of fig. 4.
Detailed Description
As shown in fig. 1 to 6, a weight grading mechanism of a dead weight type hardness standard machine includes: a frame 1, three weight grading loading mechanisms 2, a rotary driving mechanism 3, a weight lifting mechanism 5, weight components 6 and a controller (not shown);
the three weight grading loading mechanisms 2 are uniformly distributed in the frame 1 at intervals;
Each weight stage loading mechanism 2 includes: an upper end bearing 21, a weight selection column 22, a plurality of weight support rods 23, a clamp spring 24, a driven sprocket 26 and a lower end bearing 27; nine through holes are uniformly and spirally arranged on the weight selection column 22 at intervals from top to bottom according to the set weight series; one end of the weight supporting rod 23 is provided with a step surface to be inserted into the through hole, and the other end of the weight supporting rod 23 is fixed through a clamp spring 24; the angles of the nine weight support rods 23 are distributed according to 360 degrees/(9+1) =36 degrees, so that ten-level test force conversion is realized; a photoelectric switch induction plate 25 is arranged above a driven chain wheel 26 of one weight grading loading mechanism 2;
The rotary driving mechanism 3 and the photoelectric switch sensing plate 25 are both connected with a controller;
The rotary driving mechanism 3 is connected with the driven chain wheel 26, and the rotary driving mechanism 3 drives the three weight grading loading mechanisms 2 to rotate through the driven chain wheel 26;
The angle of each poking piece on the photoelectric switch induction plate 25 is consistent with the angle of each through hole, so that the controller receives signals sent by the photoelectric switch induction plate and controls the rotary driving mechanism 3 to enable the weight support rod 23 to accurately reach the corresponding position;
The weight lifting mechanism 5 is arranged in the frame, a superposed weight assembly 6 is arranged on the weight lifting mechanism, and the weight lifting mechanism 5 drives the weight assembly 6 to lift.
The rotation driving mechanism 3 specifically includes: a servo motor 31, a driving sprocket 32, a chain 33 and a plurality of tension wheels 34; the servo motor 31 is connected with a driving chain wheel 32, the driving chain wheel 32 is connected with three driven chains 26 through a chain 33, and a plurality of tension wheels 34 are arranged on the outer side of the chain 33.
In the present embodiment, each weight loading mechanism 2 is provided with nine weight support rods 23, wherein the angles are distributed according to 360 °/(9+1) =36°, and ten stages of test force conversion can be achieved. From bottom to top, the arrangement is clockwise, wherein there is a first gear without weight support bar, and when the weight selection column 22 is turned to that gear, all weights fall on the crane tray. When in operation, the lifting mechanism 5 lifts the weight first, so that the supporting surface of the weight is separated from the weight supporting column 23. Then, the servo motor 31 drives the driving sprocket 32 to rotate, thereby driving the weight selection column 22 to rotate. When the axis of the lowermost weight support rod 23 rotates to the center of the weight, the lifting mechanism 5 descends, so that nine weights are supported by the weight support rod 23, and at this time, the test force is changed. Similarly, when the axes of other weight supporting rods are corresponding to the circle centers of the weights, the weights above the weight supporting rods are all supported, so that the other test force conversion is realized. A total of 10 stages can be realized. In the specific implementation process, the test force conversion of different stages can be realized according to actual requirements.
The above examples and drawings are not intended to limit the form or form of the present utility model, and any suitable variations or modifications thereof by those skilled in the art should be construed as not departing from the scope of the present utility model.
Claims (3)
1. A weight grading mechanism of a dead weight type hardness standard machine is characterized in that: comprising the following steps: a frame, three weight grading loading mechanisms, a rotary driving mechanism, a weight lifting mechanism, weight components and a controller;
the three weight grading loading mechanisms are uniformly distributed in the rack at intervals;
Each weight grading loading mechanism comprises: the device comprises an upper end bearing, a weight selection column, a plurality of weight support rods, a clamp spring, a driven sprocket and a lower end bearing; the weight selection column is uniformly and spirally provided with a plurality of through holes at intervals from top to bottom according to the set weight series; one end of the weight supporting rod is provided with a step surface to be inserted into the through hole, and the other end of the weight supporting rod is fixed through the clamp spring; a photoelectric switch induction plate is arranged above the driven sprocket of one weight grading loading mechanism;
The rotary driving mechanism and the photoelectric switch induction plate are both connected with the controller;
The rotary driving mechanism is connected with the driven chain wheel and drives the three weight grading loading mechanisms to rotate through the driven chain wheel;
The angle of each poking piece on the photoelectric switch induction plate is consistent with the angle of each through hole, so that the controller receives signals sent by the photoelectric switch induction plate and controls the rotary driving mechanism to enable the weight support rod to accurately reach the corresponding position;
The weight lifting mechanism is arranged in the frame, the weight assembly is arranged on the weight lifting mechanism in a superposition mode, and the weight lifting mechanism drives the weight assembly to lift.
2. The weight grading mechanism of the dead weight type hardness standard machine according to claim 1, wherein: nine weight support rods are arranged on each weight grading loading mechanism, wherein angles are distributed according to 360 degrees/(9+1) =36 degrees, and ten-level test force conversion is achieved.
3. The weight grading mechanism of the dead weight type hardness standard machine according to claim 1, wherein: the rotation driving mechanism includes: a servo motor, a driving sprocket, a chain and a plurality of tensioning wheels; the servo motor is connected with the driving sprocket, the driving sprocket is connected with the driven sprocket through the chain, and the tensioning wheels are arranged on the outer side of the chain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322610707.1U CN220961059U (en) | 2023-09-26 | 2023-09-26 | Weight grading mechanism of dead weight type hardness standard machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322610707.1U CN220961059U (en) | 2023-09-26 | 2023-09-26 | Weight grading mechanism of dead weight type hardness standard machine |
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| CN202322610707.1U Active CN220961059U (en) | 2023-09-26 | 2023-09-26 | Weight grading mechanism of dead weight type hardness standard machine |
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- 2023-09-26 CN CN202322610707.1U patent/CN220961059U/en active Active
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