CN209783863U - Tennis racket bounce angle test equipment - Google Patents
Tennis racket bounce angle test equipment Download PDFInfo
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- CN209783863U CN209783863U CN201920267759.4U CN201920267759U CN209783863U CN 209783863 U CN209783863 U CN 209783863U CN 201920267759 U CN201920267759 U CN 201920267759U CN 209783863 U CN209783863 U CN 209783863U
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Abstract
The utility model relates to a tennis racket rebound angle testing device, which comprises a bottom plate, a tennis racket fixing seat, an impact hammer, a swing shaft, an angle sensor, an angle display trigger switch, an impact hammer supporting frame and an electromagnetic chuck, wherein a clamping position is arranged on the tennis racket fixing seat; the tennis racket fixing seat and the impact hammer supporting frame are both arranged on the bottom plate, the swinging shaft is rotatably supported on the impact hammer supporting frame, one end of the swinging shaft is connected with one end of the hammer arm far away from the hammer head, the other end of the swinging shaft is coaxially connected with the angle sensor, and a signal output terminal of the angle sensor is electrically connected with an I/O terminal of the angle display; the electromagnetic chuck is arranged on the chuck support, and the chuck support is connected with the impact hammer support and arranged outside one side of the oscillating shaft; the trigger switch is arranged on the impact hammer support frame, and a signal output terminal of the trigger switch is electrically connected with an I/O terminal of the angle display. The equipment can accurately and automatically obtain the rebound angle of the tennis racket, thereby greatly improving the measurement value of the rebound angle of the tennis racket.
Description
Technical Field
The utility model relates to a sport equipment detects technical field, relates to the detection technique of tennis racket, concretely relates to tennis racket bounce-back angle test equipment.
Background
the current national standard QBT2769-2006 sets the maximum value of the length and width of the tennis racket and the length and width of the racket string surface, the rebound angle of the tennis racket becomes an important factor for measuring the manufacturing quality of the racket, and the rebound angle has great relevance to the material and the tightness of the racket string and the appearance of the racket. Therefore, the test of the rebound angle of the tennis racket can accurately reflect the rebound characteristic of the tennis racket, and the appearance of the tennis racket, the selection of the material of the net strings and the tightness of the net strings are optimally designed and adjusted.
at present, the test of the rebound angle of the tennis racket mainly comprises manual observation test, specifically, an inspector fixes the tennis racket on a bracket according to a schematic diagram in QT/B2769-2006 tennis racket standard, uses a hand throwing ball to impact a racket face, and obtains the rebound angle of the tennis racket by observing the angle of the hand throwing ball.
The patent number is 2012102883658.9, and the utility model patent of name for tennis racket bounce-back angle tester discloses a simple and easy device that carries out bounce-back angle measurement through wobbling jump bit striking tennis face, the device simple structure, improved test structure's accuracy to a certain extent, nevertheless need the observer to assist the swing angle who observes and take notes the firing pin, receives the influence of human factor, and the accuracy of observation result remains further improvement.
through the search of the prior art, the technical scheme similar to the patent is not searched.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model is to overcome the shortcomings of the prior art, and provide a tennis racket bounce angle test device which can accurately and automatically obtain the tennis racket bounce angle, thereby greatly improving the tennis racket bounce angle measurement value.
The above object of the present invention is achieved by the following technical solutions:
A tennis racket rebounding angle testing device is characterized in that: the tennis racket comprises a bottom plate, a tennis racket fixing seat, an impact hammer, a swinging shaft, an angle sensor, an angle display trigger switch, an impact hammer supporting frame and an electromagnetic chuck, wherein the impact hammer consists of a hammer arm and a hammer head, a clamping position for clamping a tennis racket handle is arranged on the tennis racket fixing seat, and the angle display trigger switch adopts a proximity switch;
The tennis racket fixing seat and the impact hammer supporting frame are both arranged on the bottom plate, the swinging shaft is rotatably supported on the impact hammer supporting frame and is horizontally arranged, one end of the swinging shaft is connected with one end of the hammer arm far away from the hammer head, the other end of the swinging shaft is coaxially connected with the angle sensor, and a signal output terminal of the angle sensor is electrically connected with an I/O terminal of the angle display through a data line;
the electromagnetic chuck is arranged on the chuck support, and the chuck support is connected with the impact hammer support and arranged outside one side of the oscillating shaft;
when the impact hammer is in a free sagging position, the impact hammer is vertically aligned with a clamping position on the tennis racket fixing seat to form an impact action position; when the impact hammer rotates to a horizontal position facing one side of the electromagnetic chuck, the hammer head of the impact hammer is in suction contact with the lower end of the electromagnetic chuck to form an impact release position, and an impact hammer swinging space is formed between the impact release position and an impact action position;
The proximity switch is arranged on the impact hammer support frame and is arranged at a position aligned with the swing space of the impact hammer, and a signal output terminal of the proximity switch is electrically connected with an I/O terminal of the angle display through a data line.
And, the jump bit support frame includes grudging post, first horizontal pole, second horizontal pole, and first horizontal pole passes through slider seat and is connected with the grudging post adjustable from top to bottom, is connected with vertical adjustment lead screw between slider seat and grudging post, and the upper end of vertical adjustment lead screw is connected with the hand wheel, and the second horizontal pole supports in the top of first horizontal pole through connecting the horizontal pole support on the slider seat, and the second horizontal pole is 90 staggered arrangement with first horizontal pole, installs the swing axle bed in the top of second horizontal pole, the swing axle is connected the axle bed with the swing, and the swing axle is parallel arrangement with the second horizontal pole.
the vertical frame comprises three supporting legs which are arranged at the lower part in a triangular mode and two vertical guide rods which are arranged at the upper part, and inclined reinforcing rods are welded at the lower end parts of the vertical guide rods; the slider seat is installed on two vertical guide bars.
The tennis racket fixing seat is composed of a rail seat, a first clamping block and a second clamping block, and the two clamping blocks are fixedly connected with the rail seat in an adjustable mode along the direction parallel to the first cross rod; the inner side surface of the first clamping block is provided with an arc-shaped clamping groove, the clamping position is formed between the arc-shaped clamping groove and the inner side surface of the second clamping block, and the two clamping blocks form fixed clamping for a tennis racket placed in the clamping position through bolts.
the utility model has the advantages that:
1. The utility model discloses an angle sensor with the coaxial setting of jump bit, the biggest bounce-back angle that acts on behind tennis racket face center with the jump bit in time accurately detects and transmits and carries out data display for angle display. The equipment can accurately obtain the rebound angle of the tennis racket, and is not influenced by human factors, so that the accuracy of the measurement value of the rebound angle of the tennis racket is greatly improved.
2. The tennis racket rebound angle testing equipment can realize the adjustment of the impact hammer relative to the racket surface of the tennis racket in X, Y, Z three directions through the matching adjustment of the tennis racket fixing seat and the impact hammer supporting frame, so that the hammer head part of the impact hammer is aligned with the center of the racket surface of the tennis racket in a free vertical state, the testing precision is ensured, the testing requirements of tennis rackets with various specifications and sizes are met, and the tennis racket rebound angle testing equipment has better applicability.
Drawings
Fig. 1 is a front view of the present invention;
Fig. 2 is a left side view of the present invention;
Fig. 3 is a perspective view of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are illustrative, not restrictive, and the scope of the invention should not be limited thereto.
the invention relates to a tennis racket bounce angle testing device, please refer to fig. 1-3, which is characterized in that:
The tennis racket comprises a bottom plate 14, a tennis racket fixing seat 13, an impact hammer 5, a swinging shaft 4, an angle sensor 3, an angle display (a data angle display is adopted and not shown in the attached drawing), an angle display trigger switch 7, an impact hammer supporting frame and an electromagnetic chuck 11, wherein the impact hammer is composed of a hammer arm 5-1 and a hammer head 5-2, a clamping position for clamping a tennis racket handle is arranged on the tennis racket fixing seat, and the angle display trigger switch is a proximity switch.
The tennis racket fixing seat and the impact hammer support frame are both installed on the bottom plate, the swing shaft can be supported on the impact hammer support frame in a rotating mode and is horizontally arranged, one end of the swing shaft is connected with one end, far away from the hammer head, of the hammer arm, the other end of the swing shaft is coaxially connected with the angle sensor, and a signal output terminal of the angle sensor is electrically connected with an I/O terminal of the angle display through a data line.
The electromagnetic chuck is arranged on a chuck support 12 which is connected with the impact hammer support frame and arranged outside one side of the oscillating shaft.
When the impact hammer is in a free sagging position, the impact hammer is vertically aligned with a clamping position on the tennis racket fixing seat to form an impact action position; when the impact hammer rotates to a horizontal position facing one side of the electromagnetic chuck, the hammer head of the impact hammer is in suction contact with the lower end of the electromagnetic chuck to form an impact release position, and an impact hammer swinging space is formed between the impact release position and an impact action position;
The proximity switch is arranged on the impact hammer support frame and is arranged at a position aligned with the swing space of the impact hammer, and a signal output terminal of the proximity switch is electrically connected with an I/O terminal of the angle display through a data line.
the supporting frame of the impact hammer is of a combined frame structure and comprises a vertical frame 6, a first cross rod 10 and a second cross rod 8, wherein the first cross rod is connected with the vertical frame in an up-and-down adjustable mode through a sliding block seat 9, a vertical adjusting screw rod 2 is connected between the sliding block seat and the vertical frame to achieve the up-and-down position adjustment of the first cross rod, and a hand wheel 1 is connected to the upper end of the vertical adjusting screw rod and used for holding and adjusting the vertical adjusting screw rod. The second cross rod is supported above the first cross rod through a cross rod support 15 connected to the sliding block seat, the second cross rod and the first cross rod are arranged in a 90-degree staggered mode, a swing shaft seat 16 is installed above the second cross rod, the swing shaft is connected with the swing shaft seat, and the swing shaft and the second cross rod are arranged in parallel.
The stand further adopts the following structure:
The device comprises three supporting legs which are arranged at the lower part in a triangular manner and two vertical guide roots which are arranged at the upper part, wherein an inclined reinforcing rod is welded at the lower end part of each vertical guide rod; the slider seat is installed on two vertical guide bars. This grudging post structural design is reasonable, has the firm stable advantage of support.
The tennis racket fixing seat is composed of a rail seat 13-1, a first clamping block 13-2 and a second clamping block 13-3, wherein the two clamping blocks are fixedly connected with the rail seat in an adjustable mode along the direction parallel to the first cross rod, for example, the rail seat is made of aluminum profiles with T-shaped grooves, bolts are inserted into the T-shaped grooves, and the two clamping blocks are respectively and fixedly connected with the rail seat through the respective bolts. The inner side surface of the first clamping block is provided with an arc-shaped clamping groove 13-2-1, a clamping position is formed between the arc-shaped clamping groove and the inner side surface of the second clamping block, and the two clamping blocks form fixed clamping for a tennis racket placed in the clamping position through bolts. The tennis racket fixing seat can realize the position adjustment of a tennis row clamping position relative to the impact hammer along the X direction, the position adjustment of the impact hammer relative to the tennis racket clamping position along the Y direction can be realized by adjusting the position of the second cross rod along the axial direction, and the position adjustment of the impact hammer relative to the tennis racket clamping position along the Z direction can be realized by adjusting the position of the first cross rod along the up-down direction.
the working principle of the tennis racket rebound angle testing equipment is that;
Firstly, setting the state controlled by an electric appliance to be an adjustment state, setting the free sagging position of the impact hammer to be 0 degree, swinging the impact hammer upwards to the horizontal position contacted with the electromagnetic chuck to be 90 degrees, memorizing the position of the impact hammer through an instrument inside an angle display, then aligning the center position of an impact hammer head and a tennis racket by adjusting a support frame of the impact hammer and a tennis row fixing seat, setting the state controlled by the electric appliance to be a detection state, and closing the angle display; and then the impact hammer swings upwards to an impact release position, the electromagnetic chuck is powered off, the impact hammer is released to freely swing downwards, the angle display is triggered to be started through the proximity switch, the impact hammer rebounds after impacting the center of the tennis racket string, the angle sensor transmits the rebounding angle of the impact hammer to the angle display, and the angle display displays the maximum rebounding angle value of the impact hammer.
the device utilizes the working characteristics of the angle display, and the angle display is powered off after the test angle is adjusted according to the detection requirement. Power is turned on again for 0.2 microseconds. And the angle display is electrified by the proximity switch in the swinging and falling process of the impact hammer, and the maximum value of the rebound angle of the impact hammer is displayed by the angle display at the moment.
the detection examples are as follows:
Detecting an object: tennis racket, type: the soft tennis racket meets the requirements of standard QB/T2769-2006 tennis racket after delivery inspection, and the racket is tested by adopting the design device to measure the maximum rebound angle.
The method comprises the following specific steps
(1) The tennis racket is fixed on a tennis racket fixing seat, and the center of the impact hammer is overlapped with the center of the tennis racket through adjustment along X, Y and Z directions, so that the center of a racket string is guaranteed to be hit by each impact hammering.
(2) the test was performed according to the working principle described above.
Repeating the steps for 6 times, wherein the obtained maximum rebound angle data are shown in a table I:
Table one: rebound Angle test statistics
| Number of detections | 1 | 2 | 3 | 4 | 5 | 6 |
| Maximum bounce angle | 69.2° | 70.1° | 71.9° | 68.4° | 69.6° | 70.8° |
The maximum bounce angle value of each test can be obtained from the table I, the maximum bounce angles of 6 times are added and averaged, and the final maximum bounce angle is obtained as follows: 70 degrees.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims, and therefore, the scope of the present invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (4)
1. A tennis racket rebounding angle testing device is characterized in that: the tennis racket comprises a bottom plate, a tennis racket fixing seat, an impact hammer, a swinging shaft, an angle sensor, an angle display trigger switch, an impact hammer supporting frame and an electromagnetic chuck, wherein the impact hammer consists of a hammer arm and a hammer head, a clamping position for clamping a tennis racket handle is arranged on the tennis racket fixing seat, and the angle display trigger switch adopts a proximity switch;
the tennis racket fixing seat and the impact hammer supporting frame are both arranged on the bottom plate, the swinging shaft is rotatably supported on the impact hammer supporting frame and is horizontally arranged, one end of the swinging shaft is connected with one end of the hammer arm far away from the hammer head, the other end of the swinging shaft is coaxially connected with the angle sensor, and a signal output terminal of the angle sensor is electrically connected with an I/O terminal of the angle display through a data line;
the electromagnetic chuck is arranged on the chuck support, and the chuck support is connected with the impact hammer support and arranged outside one side of the oscillating shaft;
when the impact hammer is in a free sagging position, the impact hammer is vertically aligned with a clamping position on the tennis racket fixing seat to form an impact action position; when the impact hammer rotates to a horizontal position facing one side of the electromagnetic chuck, the hammer head of the impact hammer is in suction contact with the lower end of the electromagnetic chuck to form an impact release position, and an impact hammer swinging space is formed between the impact release position and an impact action position;
the proximity switch is arranged on the impact hammer support frame and is arranged at a position aligned with the swing space of the impact hammer, and a signal output terminal of the proximity switch is electrically connected with an I/O terminal of the angle display through a data line.
2. the tennis racket bounce angle testing apparatus of claim 1, wherein: the percussion hammer support frame includes grudging post, first horizontal pole, second horizontal pole, and first horizontal pole passes through the take-up housing to be connected with the grudging post with adjustable from top to bottom, is connected with vertical adjustment lead screw between take-up housing and grudging post, and the upper end of vertical adjustment lead screw is connected with the hand wheel, and the second horizontal pole supports in the top of first horizontal pole through connecting the horizontal pole support on the take-up housing, and the second horizontal pole is 90 staggered arrangement with first horizontal pole, installs the swing axle bed in the top of second horizontal pole, the swing axle is connected with the swing axle bed, and the swing axle is parallel arrangement with the second horizontal pole.
3. The tennis racket bounce angle testing apparatus of claim 2, wherein: the vertical frame comprises three supporting legs which are arranged at the lower part in a triangular mode and two vertical guide roots which are arranged at the upper part, and an inclined reinforcing rod is welded at the lower end part of each vertical guide rod; the slider seat is installed on two vertical guide bars.
4. The tennis racket bounce angle testing apparatus of claim 1, wherein: the tennis racket fixing seat is composed of a rail seat, a first clamping block and a second clamping block, and the two clamping blocks are fixedly connected with the rail seat in an adjustable mode along the direction parallel to the first cross rod; the inner side surface of the first clamping block is provided with an arc-shaped clamping groove, the clamping position is formed between the arc-shaped clamping groove and the inner side surface of the second clamping block, and the two clamping blocks form fixed clamping for a tennis racket placed in the clamping position through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920267759.4U CN209783863U (en) | 2019-02-28 | 2019-02-28 | Tennis racket bounce angle test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920267759.4U CN209783863U (en) | 2019-02-28 | 2019-02-28 | Tennis racket bounce angle test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209783863U true CN209783863U (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920267759.4U Active CN209783863U (en) | 2019-02-28 | 2019-02-28 | Tennis racket bounce angle test equipment |
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| Country | Link |
|---|---|
| CN (1) | CN209783863U (en) |
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2019
- 2019-02-28 CN CN201920267759.4U patent/CN209783863U/en active Active
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