Static balance detection device for blade of mowing machine

Abstract

The invention provides a mower blade static balance detection device which comprises an equipment case, an operation supporting table is arranged at the top of the equipment case, a lifting mechanism and a pressure detection mechanism are arranged on the operation supporting table, and a controller of the lifting mechanism and a controller of the pressure detection mechanism are both arranged in the equipment case. During use, the blade connecting frame capable of rotating up and down is arranged, the rotatable transmission rod is arranged at the end of the blade connecting frame, the two ends of the transmission rod are connected with the blade connecting disc and the driven disc respectively, and the blade connecting disc and the driven disc are connected with the mower blade and the transmission device respectively, so that the mower blade rotates at a high speed; when the blade of the mower is unbalanced, the blade of the mower shakes under the action of centrifugal force, so that the pressure sensor is pressed to generate data fluctuation, and whether the blade of the mower is balanced or not and the deviation value can be conveniently judged according to the amplitude of the data fluctuation.

Description

Technical Field

[0001] The present invention relates to the technical field of blade balance detection, and particularly to a static balance detection device for a lawn mower blade. Background Art

[0002] A lawn mower is also known as a weed cutter, grass shearer, lawn trimmer, etc. A lawn mower is a mechanical tool used for trimming lawns, vegetation, etc. It consists of a cutter deck, an engine, walking wheels, a walking mechanism, blades, a handrail, and a control part. Among them, the cutter deck is installed on the walking wheels, the engine is installed on the cutter deck, the output shaft of the engine is equipped with blades, and the blades use the high-speed rotation of the engine to greatly improve the speed, saving the working time of weeding workers and reducing a large amount of human resources.

[0003] Most of the blades of a lawn mower are strip-shaped or linear structures, and the cutting force generated by high-speed rotation is used to trim the lawn and vegetation. Therefore, high requirements are imposed on its balance. Otherwise, when it rotates at high speed, it will generate a large amplitude of vibration, which will lead to increased equipment wear, easy damage to the blades, and an uneven trimming surface.

[0004] Therefore, it is necessary to perform balance detection when the lawn mower leaves the factory or after long-term use to avoid equipment damage caused by blade imbalance.

[0005] The existing methods for static balance detection of blades mainly rely on manual visual inspection. The imbalance tolerance of ordinary blades is 10 g·cm (0.001 N / m), which requires a very high precision relative to the total weight of the blade (0.3 - 1 kg). Manual detection has the disadvantages of difficult operation, large errors, and low work efficiency. At the same time, it can also be detected by a torque sensor. However, the torque sensor has the disadvantages of insufficient measurement accuracy, easy damage to precision, and high maintenance cost. As a result, it is inconvenient to detect the static balance of lawn mower blades in the prior art.

[0006] Therefore, this application proposes a static balance detection device for a lawn mower blade to improve the convenience of static balance detection of lawn mower blades. Summary of the Invention

[0007] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a static balance detection device for a lawn mower blade to solve the problem of inconvenient detection of lawn mower blades mentioned in the prior art.

[0008] To achieve the above object and other related objects, the present invention provides a static balance detection device for a lawn mower blade, including an equipment chassis. An operation support platform is arranged on the top of the equipment chassis. A lifting mechanism and a pressure detection mechanism are respectively arranged on the operation support platform. The controllers of the lifting mechanism and the pressure detection mechanism are both arranged inside the equipment chassis; A blade fixing mechanism is installed on the lifting mechanism. The blade fixing mechanism can rotate up and down with the connection point as the axis. The blade fixing mechanism overlaps on the pressure detection mechanism to apply pressure to the pressure detection mechanism. The blade fixing mechanism is used to connect and install the lawn mower blade. A blade transmission mechanism is also installed on the operation support table. The blade transmission mechanism is used to drive the lawn mower blade to rotate; The blade fixing mechanism includes a blade connecting frame. One end of the blade connecting frame is hinged to the lifting mechanism, enabling the blade connecting frame to rotate up and down. A rotatable transmission rod is provided at the end of the blade connecting frame away from the lifting mechanism. The outer surface of the transmission rod abuts against the sensing end of the pressure detection mechanism. A blade connecting disc is provided at one end of the transmission rod. The blade connecting disc is used to install the lawn mower blade. A driven disc is provided at the other end of the transmission rod. The driven disc is connected to the output end of the blade transmission mechanism.

[0009] Preferably, the top view cross-section of the blade connecting frame is a U-shaped fork structure. The transmission rod penetrates through both sides of the blade connecting frame equidistantly from the axis of the blade connecting frame.

[0010] Preferably, the lifting mechanism includes a lifting support frame. The lifting support frame is U-shaped in the top view state. A slider driving rod and a limit traction rod are arranged in parallel inside the lifting support frame; The bottom of the slider driving rod extends into the interior of the equipment chassis. The bottom of the limit traction rod is fixed to the top of the operation support table; A lifting slider is threadedly connected to the outer surface of the slider driving rod. At the same time, the lifting slider is penetrated by the limit traction rod; The blade connecting frame is hinged to the side of the lifting slider.

[0011] Preferably, the outer surface of the lifting slider fits with the interior of the lifting support frame.

[0012] Preferably, the pressure detection mechanism includes a telescopic device. The bottom of the telescopic device extends into the interior of the equipment chassis. A telescopic rod is inserted into the top of the telescopic device. The telescopic rod expands and contracts inside the telescopic device under the action of pressure. A pressure sensor is provided at the upper end of the telescopic rod; The top of the pressure sensor abuts against the outer surface of the transmission rod.

[0013] Preferably, a stabilizer is sleeved on the outer surface of the telescopic rod. The bottom of the stabilizer is fixedly connected to the top of the operation support table.

[0014] ​ A wiring hole is provided at the bottom of the pressure sensor mounting hole, and a wire groove is provided on the outer surface of the sensor driving rod, wherein the wire groove is connected to the wiring hole; The wires of the pressure sensor extend into the interior of the device chassis through the wiring holes and the wire troughs respectively.

[0015] Preferably, the blade transmission mechanism includes a motor support frame and a transmission belt, the motor support frame is installed on the side of the lifting mechanism, a transmission motor is installed on the top of the motor support frame, and the transmission belt is respectively connected to the output end of the transmission motor and the driven disk; The side surface of the lifting support frame is provided with a plurality of threaded holes at equal intervals, and the motor support frame can be installed with different threaded holes to adjust the installation height.

[0016] Preferably, a limiter mounting frame is provided on the top of the blade connecting frame; The limiter mounting frame is threadedly connected to a limit mechanism, and the distance between the outer surface of the limit mechanism and the outer surface of the lifting support frame is adjustable.

[0017] Preferably, the limiting mechanism includes a threaded rod, which is threadedly connected to the limiter mounting bracket, and an interference block is provided at the end of the threaded rod. The outer contour of the interference block is an irregular polygon, and an adjustment head is provided at the end of the interference block.

[0018] As described above, the lawn mower blade static balance detection device of the present invention has the following beneficial effects: The present invention provides a blade connecting frame that can rotate up and down, and provides a rotatable transmission rod at the end of the blade connecting frame, the two ends of the transmission rod are respectively connected to the blade connecting disk and the driven disk, and the blade connecting disk and the driven disk are respectively connected to the lawn mower blade and the transmission device, so that the lawn mower blade rotates at high speed. When the lawn mower blade is unbalanced, it will shake under the action of centrifugal force, thereby compressing the pressure sensor to produce data fluctuations. The amplitude of the data fluctuation can be used to conveniently judge whether the lawn mower blade is balanced and the amount of deviation, thereby achieving the effect of facilitating static balancing of the lawn mower blade.

[0019] The present invention provides a lifting support frame, and provides a slider driving rod inside the lifting support frame to drive the lifting slider to rise and fall. At the same time, the telescopic device and the telescopic rod cooperate to drive the pressure sensor to rise and fall, so as to change the height of the blade connecting frame, so that lawn mower blades of different sizes can be installed on the blade connecting plate, avoiding the interference of the lawn mower blade that is too large in size with the operating support platform, thereby achieving the effect of improving the scope of application.

[0020] At the same time, a limiting traction rod is provided inside the lifting support frame, which further limits the lifting slider through the limiting traction rod, and makes the outer surface of the lifting slider fit with the inner wall of the lifting support frame, which can improve the lifting stability of the lifting slider. When the lawn mower blade rotates at high speed, the stability of the lifting slider can be improved, avoiding the vibration of the lifting slider and interfering with the detection data, thereby improving the accuracy of the detection data.

[0021] The present invention provides a plurality of threaded holes on the side of the lifting support frame, and enables the motor support frame to be connected to the threaded holes at different heights. When the lifting range of the blade connecting frame is large and the transmission belt is not long enough, the installation position of the motor support frame can be adjusted, thereby achieving the effect of further improving the adaptability of the device.

[0022] The present invention installs a limiter mounting frame on the top of the blade connecting frame, and threadedly connects a threaded rod in the limiter mounting frame, and at the same time provides an interference block at the end of the threaded rod. By rotating the threaded rod, different surfaces of the interference block are made to face the lifting support frame to change the distance between the interference block and the lifting support frame, thereby changing the amplitude of the upward vibration of the blade connecting frame or the upward rotation of the stationary blade connecting frame, so as to reduce the impact force of the transmission rod on the pressure sensor and improve the service life of the pressure sensor.

[0023] The present invention provides a pressure sensor mounting hole at the end of the sensor driving rod for mounting the pressure sensor, and allows the line of the pressure sensor to extend to the interior of the equipment chassis through the wiring hole and the wire trough, so that the pressure sensor can be easily disassembled for replacement and maintenance, and can prevent the line of the pressure sensor from being damaged by the stabilizer when the sensor driving rod is raised or lowered.

[0024] The present invention provides a stabilizer on the outer surface of the telescopic rod to support and protect the telescopic rod, thereby preventing the telescopic rod from shaking due to the power of the lawn mower blade vibrating, and preventing the telescopic rod from applying pressure to the telescope due to the lever principle, thereby preventing the telescopic rod from being damaged.

[0025] Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Shown is a front view of the structure of the present invention.

[0027] Figure 2 Shown is a top view of the structure of the present invention.

[0028] Figure 3 Shown is a schematic structural diagram of the present invention.

[0029] Figure 4 Shown as the present invention Figure 3Schematic diagram of the enlarged structure at location A in

[0030] Figure 5 Shown is a schematic diagram of the connection between the lifting slider and the blade connecting frame of the present invention.

[0031] Figure 6 Shown is a schematic diagram of the structure of the transmission rod of the present invention.

[0032] Figure 7 Shown is a schematic diagram of the structure of the pressure detection structure of the present invention.

[0033] Figure 8 Shown is a cross-sectional view of the structure of the pressure detection structure of the present invention.

[0034] Figure 9 Shown is a schematic diagram of the structure of the telescopic rod of the present invention.

[0035] Figure 10 Shown is a cross-sectional view of the structure of the telescopic rod of the present invention.

[0036] Figure 11 Shown is an installation schematic diagram of the motor support frame of the present invention.

[0037] Figure 12 Shown is a schematic diagram of the structure of the limit mechanism of the present invention.

[0038] Explanation of component numbers: 1. Equipment chassis; 2. Operation support platform; 3. Lifting mechanism; 31. Lifting support frame; 32. Slide drive rod; 33. Limit traction rod; 34. Lifting slider; 4. Blade fixing mechanism; 41. Blade connecting frame; 42. Transmission rod; 43. Blade connecting disc; 44. Driven disc; 45. Limiter mounting frame; 5. Pressure detection mechanism; 51. Expander; 52. Telescopic rod; 521. Sensor drive rod; 522. Piston rod; 523. Pressure sensor mounting hole; 524. Wiring hole; 525. Wire groove; 53. Pressure sensor; 54. Stabilizer; 6. Blade transmission mechanism; 61. Motor support frame; 62. Transmission motor; 63. Transmission belt; 7. Limit mechanism; 71. Threaded rod; 72. Contact block; 73. Adjusting head. Specific embodiments

[0039] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification.

[0040] Please refer to Figures 1 to 12It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to match the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they do not have any technical substance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the efficacy that the present invention can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present invention.

[0041] As Figures 1 - 3 and Figure 6 shown, the present invention provides a static balance detection device for a lawn mower blade, including an equipment chassis 1. Inside the equipment chassis 1, there are electrical equipment, a power supply device, and a signal transmission device adapted to this device. Outside this equipment, there are also a display device and a control device connected to the equipment chassis 1. The electrical equipment inside the equipment chassis 1 is controlled by the control device, and the detected data is transmitted to the display device through the signal transmission device for display. On the top of the equipment chassis 1, there is an operation support platform 2. The main body of the operation support platform 2 is a solid body, which improves stability and supportability. Inside the solid body, there are wiring grooves and equipment installation slots to facilitate equipment installation and wiring. An elevating mechanism 3 and a pressure detection mechanism 5 are respectively arranged on the operation support platform 2. The controllers of the elevating mechanism 3 and the pressure detection mechanism 5 are both arranged inside the equipment chassis 1, so that the elevating mechanism 3 and the pressure detection mechanism 5 can be controlled by external equipment.

[0042] A blade fixing mechanism 4 is installed on the elevating mechanism 3. The blade fixing mechanism 4 can rotate up and down with the connection point as the axis. The blade fixing mechanism 4 overlaps on the pressure detection mechanism 5 to apply pressure to the pressure detection mechanism 5. The blade fixing mechanism 4 is used to connect and install the lawn mower blade. A blade transmission mechanism 6 is also installed on the operation support platform 2. The blade transmission mechanism 6 is used to drive the lawn mower blade to rotate. The pressure detection mechanism 5 generates corresponding pressure wave lines by sensing the magnitude of the pressure and displays the wave lines on the display. Whether the lawn mower blade is qualified is judged by the undulation amplitude and interval of the wave lines. When the lawn mower blade rotates at high speed, if the lawn mower blade is qualified, the undulation amplitude of the pressure wave lines generated by it is small and the interval is uniform. If the lawn mower blade is unqualified, then the lawn mower blade will shake violently under the action of centrifugal force. At this time, the pressure data monitored by the pressure detection mechanism 5 will fluctuate greatly and the fluctuation amplitude is relatively chaotic.

[0043] The blade fixing mechanism 4 includes a blade connecting frame 41. One end of the blade connecting frame 41 is hinged to the lifting mechanism 3, enabling the blade connecting frame 41 to rotate up and down. When the lawn mower blade rotates at high speed and vibrates, the kinetic energy will drive the blade connecting frame 41 to float up and down, thereby exerting a greater pressure on the pressure detection mechanism 5. At the end of the blade connecting frame 41 away from the lifting mechanism 3, there is a rotatable transmission rod 42. The outer surface of the transmission rod 42 abuts against the sensing end of the pressure detection mechanism 5. The pressure generated by the vibration of the blade connecting frame 41 will be transmitted to the pressure detection mechanism 5 through the transmission rod 42, and thus be captured by the pressure detection mechanism 5 to form real-time pressure data. One end of the transmission rod 42 is provided with a blade connecting disc 43. A hole for installing the lawn mower blade is provided at the axis of the blade connecting disc 43. The blade connecting disc 43 cooperates with bolts for installing the lawn mower blade. The other end of the transmission rod 42 is provided with a driven disc 44. The driven disc 44 is connected to the output end of the blade transmission mechanism 6. After the blade transmission mechanism 6 transmits power to the driven disc 44, the power will drive the transmission rod 42 to rotate, and then make the lawn mower blade rotate at high speed.

[0044] As Figure 2 , Figure 3 and Figure 5 shown, in some embodiments, the top view cross-section of the blade connecting frame 41 of the present invention is a U-shaped fork structure. The transmission rod 42 penetrates through both sides of the blade connecting frame 41 equidistantly from the axis of the blade connecting frame 41, so that the axis of the transmission rod 42 can contact the end of the pressure detection mechanism 5 to improve the accuracy of data measurement. At the same time, it can also effectively reduce the weight of the blade connecting frame 41.

[0045] As Figure 2 and Figure 3 shown, in some embodiments, the lifting mechanism 3 of the present invention includes a lifting support frame 31. The lifting support frame 31 is U-shaped in the top view state, so that the middle part of the lifting support frame 31 is hollow. Inside the lifting support frame 31, a slider driving rod 32 and a limit traction rod 33 are arranged in parallel. The outer surface of the slider driving rod 32 is provided with an external thread, and a limit is provided at the top. The bottom of the slider driving rod 32 extends into the interior of the equipment chassis 1 and is thus driven by a driving device arranged in the equipment chassis 1. The outer surface of the limit traction rod 33 is a smooth surface, and the top of the limit traction rod 33 is flush with the top of the slider driving rod 32. The bottom of the limit traction rod 33 is fixed to the top of the operation support table 2, so that the limit traction rod 33 and the slider driving rod 32 are kept parallel.

[0046] The outer surface of the slider drive rod 32 is threadedly connected with a lifting slider 34. When the slider drive rod 32 rotates, the lifting force provided by the thread drives the lifting slider 34 to move up and down. At the same time, the lifting slider 34 is penetrated by the limit traction rod 33, so as to further support the lifting slider 34 and keep the lifting slider 34 stable during the lifting process. And when the blade connecting frame 41 shakes, the lifting slider 34 remains relatively stationary due to the two-point support. The blade connecting frame 41 is hinged to the side of the lifting slider 34, so that the blade connecting frame 41 can move up and down following the lifting of the lifting slider 34. At the same time, the blade connecting frame 41 is installed in a hinged manner, so that the blade connecting frame 41 can swing up and down after being stressed.

[0047] As Figure 4 shown, in some embodiments, the outer surface of the lifting slider 34 of the present invention fits with the inside of the lifting support frame 31, and the inner wall of the lifting support frame 31 wraps and restricts the outer surface of the lifting slider 34, so as to effectively improve the stability of the lifting slider 34 in the lifting or stationary state.

[0048] As Figure 3 and Figure 7 shown, in some embodiments, the pressure detection mechanism 5 of the present invention includes a telescopic device 51, and the bottom of the telescopic device 51 extends into the interior of the equipment chassis 1. A telescopic rod 52 is inserted into the top of the telescopic device 51. The telescopic device 51 is a pneumatic or hydraulic driving device, and the telescopic rod 52 expands and contracts inside the telescopic device 51 under the action of gas pressure or liquid pressure. For its specific working principle and structure, please refer to the hydraulic cylinder. A pressure sensor 53 is arranged at the upper end of the telescopic rod 52, and the top of the pressure sensor 53 abuts against the outer surface of the transmission rod 42. The top of the pressure sensor 53 is set as an arc surface, and the radian of the arc surface is adapted to the radian of the outer surface of the transmission rod 42 to increase the contact area between the end of the pressure sensor 53 and the transmission rod 42. When the lawn mower blade rotates at a high speed, if the blade is qualified, the centrifugal force generated by it is stable and uniform, so that the pressure exerted by the transmission rod 42 on the pressure sensor 53 is uniform and stable. Otherwise, the centrifugal force generated by the blade will deviate and shake, and as the amplitude of the shake increases, the pressure exerted by the transmission rod 42 on the pressure sensor 53 will have a large fluctuation.

[0049] As Figure 3 and Figure 8As shown, in some embodiments, a stabilizer 54 is sleeved on the outer surface of the telescopic rod 52 of the present invention, and the bottom of the stabilizer 54 is fixedly connected to the top of the operation support platform 2. Since the pressure sensor 53 is disposed at the top of the telescopic rod 52, when the pressure sensor 53 is subjected to centrifugal pressure, in addition to the pressure in the vertical direction, the pressure sensor 53 will also be subjected to partial pressure in the horizontal direction. At this time, the pressure in the horizontal direction acts on the telescopic rod 52, thereby causing pressure on the connection between the telescopic device 51 and the telescopic rod 52 through the lever principle. By covering the outer surface of the telescopic rod 52 with the stabilizer 54, the pressure on the telescopic rod 52 acts on the stabilizer 54 to prevent damage to the cylinder body of the telescopic device 51.

[0050] As Figure 9 and Figure 10 As shown, in some embodiments, the telescopic rod 52 of the present invention includes a sensor drive rod 521, and a piston rod 522 is disposed at the connection end of the sensor drive rod 521 and the telescopic device 51. The outer surface of the piston rod 522 is closely connected to the inner wall of the telescopic device 51, so that a sealed cavity is formed inside the telescopic device 51. When pressure is generated inside the telescopic device 51, the piston rod 522 can be pushed to drive the sensor drive rod 521 to rise. A pressure sensor mounting hole 523 is disposed at the other end of the sensor drive rod 521, and the pressure sensor 53 is detachably mounted inside the pressure sensor mounting hole 523. Thus, the vulnerable part, the pressure sensor 53, is convenient for maintenance and replacement.

[0051] A wiring hole 524 is disposed at the bottom of the pressure sensor mounting hole 523, and a wire groove 525 is disposed on the outer surface of the sensor drive rod 521. The wire groove 525 communicates with the wiring hole 524. The wires of the pressure sensor 53 extend into the interior of the equipment chassis 1 through the wiring hole 524 and the wire groove 525 respectively, so as to facilitate the wires of the pressure sensor 53 to enter the interior of the equipment chassis 1 to improve the aesthetics. At the same time, when the sensor drive rod 521 rises, the cables exposed to the outside will be placed in the wire groove 525 under the action of pressure, so as to prevent the stabilizer 54 from applying pressure to the cables and causing cable damage.

[0052] As Figure 3 and Figure 12As shown, in some embodiments, the blade drive mechanism 6 of the present invention includes a motor support frame 61 and a drive belt 63. The motor support frame 61 is in a lying U shape and is installed on the side of the lifting mechanism 3. A drive motor 62 is installed on the top of the motor support frame 61. The drive belt 63 is respectively connected to the output end of the drive motor 62 and the driven disk 44, thereby transmitting power to the drive rod 42 so that the lawn mower blade can rotate at high speed to generate centrifugal force. When the blade connection frame 41 vibrates under the action of the centrifugal force of the lawn mower blade, the total distance between the driven disk 44 and the output shaft of the drive motor 62 remains unchanged. Therefore, the drive belt 63 will take the output shaft of the drive motor 62 as the axis, and the other end will vibrate with the vibration of the driven disk 44. And although the drive motor 62 will vibrate during operation, the amplitude and frequency of its vibration are stable and regular. Therefore, the pressure generated by the vibration of the drive motor 62 can be pre-treated for noise reduction. Of course, because the vibration amplitude of the drive motor 62 is relatively stable, not doing treatment will not have too much impact on the static balance test of the lawn mower blade.

[0053] A number of threaded holes are equidistantly arranged on the side of the lifting support frame 31, and the motor support frame 61 can be installed with different threaded holes to adjust the installation height. When the lifting slider 34 is lifted excessively, the length of the drive motor 62 will no longer be able to be connected to the driven disk 44. At this time, the height of the motor support frame 61 can be adjusted to make the drive motor 62 continue to be adapted to the driven disk 44.

[0054] As Figure 4 and Figure 5 As shown, in some embodiments, a limiter mounting frame 45 is provided at the top of the blade connection frame 41 of the present invention. A limiting mechanism 7 is threadedly connected in the limiter mounting frame 45. The distance between the outer surface of the limiting mechanism 7 and the outer surface of the lifting support frame 31 can be adjusted. By adjusting the distance between the limiting mechanism 7 and the outer surface of the lifting support frame 31, the amplitude of the upward rotation of the blade connection frame 41 can be controlled, so as to reduce the excessive impact force exerted on the pressure sensor 53 by the drive rod 42 during the downward movement of the blade connection frame 41, and to improve the service life of the pressure sensor 53.

[0055] As Figure 12 As shown, in some embodiments, the limiting mechanism 7 of the present invention includes a threaded rod 71. The threaded rod 71 is threadedly connected to the limiter mounting frame 45. A contact block 72 is provided at the end of the threaded rod 71, and the outer contour of the contact block 72 is an irregular polygon. By rotating the threaded rod 71, the contact block 72 can be rotated, so that different faces of the contact block 72 face the lifting support frame 31 to change the distance between the contact block 72 and the lifting support frame 31. An adjustment head 73 is provided at the end of the contact block 72, and the outer surface of the adjustment head 73 is an irregular structure. The adjustment head 73 is used to facilitate the operator to rotate the threaded rod 71 to adjust the contact block 72.

[0056] In summary, the lawn mower blade static balance detection device of the present invention is provided with a blade connecting frame 41 that can be rotated up and down, and a rotatable transmission rod 42 is provided at the end of the blade connecting frame 41, and the two ends of the transmission rod 42 are respectively connected to the blade connecting plate 43 and the driven plate 44, and the blade connecting plate 43 and the driven plate 44 are respectively connected to the lawn mower blade and the transmission device, so that the lawn mower blade rotates at high speed. When the lawn mower blade is unbalanced, it will shake under the action of centrifugal force, thereby compressing the pressure sensor 53 to produce data fluctuations. The amplitude of the data fluctuation can be used to conveniently judge whether the lawn mower blade is balanced and the amount of deviation, thereby achieving the effect of facilitating the static balance of the lawn mower blade.

[0057] The present invention provides a lifting support frame 31, and provides a slider driving rod 32 inside the lifting support frame 31 to drive the lifting slider 34 to move up and down. At the same time, the telescopic device 51 and the telescopic rod 52 cooperate to drive the pressure sensor 53 to move up and down to change the height of the blade connecting frame 41, so that different sizes of lawn mower blades can be installed on the blade connecting plate 43, avoiding the interference of excessive size of the lawn mower blade with the operating support platform 2, thereby achieving the effect of improving the scope of application.

[0058] At the same time, a limiting traction rod 33 is provided inside the lifting support frame 31, and the lifting slider 34 is further limited by the limiting traction rod 33, and the outer surface of the lifting slider 34 is fit with the inner wall of the lifting support frame 31, which can improve the stability of the lifting slider 34. When the lawn mower blade rotates at high speed, the stability of the lifting slider 34 can be improved, and the vibration of the lifting slider 34 can be avoided to interfere with the detection data, thereby improving the accuracy of the detection data.

[0059] The present invention sets a plurality of threaded holes on the side of the lifting support frame 31, and enables the motor support frame 61 to be connected to the threaded holes at different heights. When the lifting range of the blade connecting frame 41 is large and the transmission belt 63 is not long enough, the installation position of the motor support frame 61 can be adjusted, thereby achieving the effect of further improving the adaptability of the device.

[0060] The present invention installs a limiter mounting frame 45 on the top of the blade connecting frame 41, and threadedly connects a threaded rod 71 in the limiter mounting frame 45, and at the same time provides a resistance block 72 at the end of the threaded rod 71. By rotating the threaded rod 71, different surfaces of the resistance block 72 face the lifting support frame 31 to change the distance between the resistance block 72 and the lifting support frame 31, thereby changing the amplitude of the upward vibration of the blade connecting frame 41 or the upward rotation of the stationary blade connecting frame 41, so as to reduce the impact force of the transmission rod 42 on the pressure sensor 53, thereby improving the service life of the pressure sensor 53.

[0061] In the present invention, a pressure sensor mounting hole 523 is provided at the end of the sensor drive rod 521 for mounting the pressure sensor 53, and the circuit of the pressure sensor 53 extends to the inside of the equipment chassis 1 through the wiring hole 524 and the wire groove 525, so that the pressure sensor 53 can be conveniently disassembled and assembled for replacement and maintenance, and when the sensor drive rod 521 moves up and down, the circuit of the pressure sensor 53 can be prevented from being pinched by the stabilizer 54.

[0062] In the present invention, a stabilizer 54 is provided on the outer surface of the telescopic rod 52 to support and protect the telescopic rod 52, prevent the power generated by the vibration of the lawn mower blade from causing the telescopic rod 52 to shake, and prevent the telescopic rod 52 from applying pressure to the telescopic device 51 due to the lever principle, resulting in damage to the telescopic device 51.

[0063] Therefore, the present invention effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0064] The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A static balance detection device for a lawn mower blade, characterized in that, It includes an equipment chassis (1), on the top of the equipment chassis (1) there is an operation support platform (2), on the operation support platform (2) there are respectively arranged a lifting mechanism (3) and a pressure detection mechanism (5), and the controllers of the lifting mechanism (3) and the pressure detection mechanism (5) are both arranged inside the equipment chassis (1); On the lifting mechanism (3) there is installed a blade fixing mechanism (4), the blade fixing mechanism (4) can rotate up and down with the connection point as the axis, the blade fixing mechanism (4) overlaps on the pressure detection mechanism (5) to apply pressure to the pressure detection mechanism (5), the blade fixing mechanism (4) is used to connect and install a lawn mower blade, and on the operation support platform (2) there is also installed a blade transmission mechanism (6), the blade transmission mechanism (6) is used to drive the lawn mower blade to rotate; The blade fixing mechanism (4) includes a blade connecting frame (41), one end of the blade connecting frame (41) is hinged to the lifting mechanism (3) so that the blade connecting frame (41) can rotate up and down, at the end of the blade connecting frame (41) far from the lifting mechanism (3) there is arranged a rotatable transmission rod (42), the outer surface of the transmission rod (42) abuts against the sensing end of the pressure detection mechanism (5), at one end of the transmission rod (42) there is a blade connecting disc (43), the blade connecting disc (43) is used to install the lawn mower blade, and at the other end of the transmission rod (42) there is a driven disc (44), the driven disc (44) is connected to the output end of the blade transmission mechanism (6).

2. The grass cutter blade static balance detection device according to claim 1, characterized in that: The top view cross-section of the blade connecting frame (41) is a U-shaped fork structure, and the transmission rod (42) penetrates through both sides of the blade connecting frame (41) equidistantly from the axis of the blade connecting frame (41).

3. The grass mower blade static balance detection device according to claim 1, wherein: The lifting mechanism (3) includes a lifting support frame (31), the lifting support frame (31) is U-shaped in the top view state, and inside the lifting support frame (31) there are parallelly arranged a slider driving rod (32) and a limit traction rod (33); The bottom of the slider driving rod (32) extends to the inside of the equipment chassis (1), and the bottom of the limit traction rod (33) is fixed on the top of the operation support platform (2); The outer surface of the slider driving rod (32) is threadedly connected with a lifting slider (34), and at the same time the lifting slider (34) is penetrated by the limit traction rod (33); The blade connecting frame (41) is hinged to the side surface of the lifting slider (34).

4. The lawn mower blade static balance detection device according to claim 3, characterized in that: The outer surface of the lifting slider (34) fits with the inside of the lifting support frame (31).

5. The grass mower blade static balance detection device according to claim 2, characterized in that: The pressure detection mechanism (5) includes a telescopic device (51), the bottom of the telescopic device (51) extends to the inside of the equipment chassis (1), the top of the telescopic device (51) is inserted with a telescopic rod (52), the telescopic rod (52) expands and contracts inside the telescopic device (51) under the action of pressure, and at the upper end of the telescopic rod (52) there is a pressure sensor (53); The top of the pressure sensor (53) abuts against the outer surface of the transmission rod (42).

6. The grass mower blade static balance detection device according to claim 5, characterized in that: A stabilizer (54) is sleeved on the outer surface of the telescopic rod (52), and the bottom of the stabilizer (54) is fixedly connected to the top of the operation support platform (2).

7. The static balance detection device for a lawn mower blade according to claim 6, wherein: The telescopic rod (52) includes a sensor drive rod (521). A piston rod (522) is provided at the connection end of the sensor drive rod (521) and the telescopic device (51). A pressure sensor mounting hole (523) is provided at the other end of the sensor drive rod (521). The pressure sensor (53) is detachably mounted inside the pressure sensor mounting hole (523). A wiring hole (524) is provided at the bottom of the pressure sensor mounting hole (523), and a wire groove (525) is provided on the outer surface of the sensor drive rod (521). The wire groove (525) communicates with the wiring hole (524). The wires of the pressure sensor (53) extend into the interior of the equipment chassis (1) through the wiring hole (524) and the wire groove (525) respectively.

8. The static balance detection device for a lawn mower blade according to claim 3, wherein: The blade transmission mechanism (6) includes a motor support frame (61) and a transmission belt (63). The motor support frame (61) is installed on the side of the lifting mechanism (3). A transmission motor (62) is installed on the top of the motor support frame (61). The transmission belt (63) is connected to the output end of the transmission motor (62) and the driven disk (44) respectively. A number of threaded holes are equidistantly arranged on the side of the lifting support frame (31). The motor support frame (61) can be installed at different threaded holes to adjust the installation height.

9. The grass cutter blade static balance detection device according to claim 3, characterized in that: A limiter mounting frame (45) is provided at the top of the blade connection frame (41). A limiting mechanism (7) is threadedly connected in the limiter mounting frame (45). The distance between the outer surface of the limiting mechanism (7) and the outer surface of the lifting support frame (31) is adjustable.

10. The grass mower blade static balance detection device according to claim 9, characterized in that: The limiting mechanism (7) includes a threaded rod (71). The threaded rod (71) is threadedly connected to the limiter mounting frame (45). A contact block (72) is provided at the end of the threaded rod (71). The outer contour of the contact block (72) is an irregular polygon. An adjustment head (73) is provided at the end of the contact block (72).

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