Mower bumping test bench
By designing the lawn mower bump test bench, the power mechanism is used to drive the bump table to simulate road bumps, solving the problem that the existing test methods are susceptible to environmental and human factors, and achieving an efficient and accurate test process.
Patent Information
- Application Number
- CN202421151012.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-05-24
AI Technical Summary
The existing lawn mower bump test methods are susceptible to environmental and human factors, are time-consuming and labor-intensive and have high safety risks.
A lawn mower bump test bench is designed, including bump table, limit bracket and pulling mechanism, which simulates bumpy road surface and drives the bumpy table back and forth through the power mechanism to reduce human participation.
The test bench can accurately simulate uneven road surfaces, reduce interference from external factors, improve test accuracy, save manpower and time resources, and has a simple structure and a small footprint.
Smart Images
Figure CN222481840U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of lawn mower bump test, in particular to a lawn mower bump test bench. Background Art
[0002] Lawn mower, also known as weed cutter, lawn mower, lawn trimmer, etc. A lawn mower is a mechanical tool used to trim lawns, vegetation, etc. It plays an important role in agricultural production and is mainly composed of a cutter disc, an engine, a walking system, a blade, an armrest, and a control part.
[0003] Since the actual operating conditions of lawn mowers are usually uneven and complex, the performance of lawn mowers needs to be tested and judged before they are put on the market. The main testing process is to let the lawn mower move back and forth on a bumpy road. After running for a specified period of time, check whether the various parts of the lawn mower are loose or defective, which may affect the safety of use, and check whether the basic functions of the travel system are affected, so as to judge whether the performance of the lawn mower meets the requirements.
[0004] The field test is a traditional test method, which is to select an uneven road surface and push and pull the lawn mower back and forth by manual push and pull and mechanical drive. In the actual test, this traditional method showed the following shortcomings:
[0005] (1) Susceptible to environmental influences: Factors such as weather and terrain may affect the accuracy of test results.
[0006] (2) Time-consuming and labor-intensive: Field testing requires a lot of time and human resources.
[0007] (3) High safety risk: There may be unexpected risks when testers operate the lawn mower on uneven terrain.
[0008] (2) Susceptible to human factors: It is difficult to control the stability of the lawn mower during manual pushing and pulling movements, which affects the test results.
[0009] Based on the above analysis, the present application designs a lawn mower bump test bench. Summary of the invention
[0010] The utility model aims to provide a lawn mower bump test bench, which simulates a bumpy road surface, reduces the degree of human participation and solves the shortcomings of existing field tests.
[0011] In order to solve the above problems, the present application provides a lawn mower bump test bench, comprising:
[0012] A lawn mower bump test bench, characterized by comprising:
[0013] A bumping platform, the lower part of which is provided with a walking mechanism, and the upper part of which is a concave-convex surface;
[0014] A limit bracket, which is arranged on one side of the running direction of the bumping platform, and comprises a fixed frame and a limit track. The fixed frame is provided with a locking mechanism for locking the lawn mower to ensure that it is stable on the bumping platform, and the free end of the limit track extends to the bottom of the bumping platform to limit the walking mechanism;
[0015] A pulling mechanism comprises a power mechanism and a crank arm connecting rod, and the pulling mechanism is arranged on one side of the bumping platform, the crank arm connecting rod is connected between the power mechanism and the bumping platform, and the power output by the power mechanism can be transmitted to the bumping platform through the crank arm connecting rod to drive the bumping platform to move back and forth.
[0016] As a preferred embodiment of the present application, the bumping platform includes a base, on the upper part of which are installed a plurality of strip plates arranged in parallel, with a height difference between two adjacent strip plates, or a height difference between several of the plurality of strip plates arranged in parallel and the other strip plates, and the height difference constitutes a concave and convex surface.
[0017] As a preferred solution of the present application, the height difference between two adjacent shaped plates is 7-9 mm, and the spacing between two adjacent shaped plates is 9-11 mm.
[0018] As a preferred solution of the present application, the width of the strip plate is 85-95 mm.
[0019] As a preferred solution of the present application, the fixed frame includes a base and a column, and the locking mechanism arranged on the fixed frame includes a first guide rail and a tensioning member, the first guide rail is horizontally arranged and its two ends are slidably fixed on the column of the fixed frame, the tensioning member is fixed on the first guide rail, and the first guide rail can be used to adjust the displacement of the tensioning member relative to the bumping platform in the vertical and / or horizontal direction.
[0020] As a preferred solution of the present application, the tensioning member includes a U-shaped bracket and a tension spring. The U-shaped bracket is fixed to the upper end of the first guide rail through a slider and is vertically arranged relative to the first guide rail. The tension spring includes two, which are respectively fixed on both sides of the U-shaped bracket.
[0021] As a preferred solution of the present application, a second guide rail is provided on the fixing frame, and the second guide rail is vertically arranged relative to the first guide rail, and one side of the U-shaped bracket of the tensioning member is connected to the second guide rail through a slider.
[0022] As a preferred solution of the present application, the tension spring is fixed to the upper ends of both sides of the U-shaped bracket by studs, and the distance of the tension spring relative to the inner side of the end of the U-shaped bracket can be adjusted by the studs.
[0023] As a preferred solution of the present application, the crank arm connecting rod includes a rotating arm and a telescopic arm. The rotating arm is fixed on the output shaft of the power mechanism and can rotate with the output shaft. The telescopic arm is hinged to the rotating arm and the bump table. When the rotating arm rotates, the telescopic arm will be driven to move telescopically and then drive the bump table to perform reciprocating motion in a straight line trajectory.
[0024] As a preferred solution of the present application, the length of the telescopic arm is not less than 1000 mm; the length of the rotating arm is not less than 200 mm.
[0025] Compared with the prior art, the advantages of the lawn mower bump test bench of the present application are:
[0026] A concave and convex surface is used to simulate the existing conventional uneven road surface. At the same time, the test is carried out in a way that the "road surface" moves while the lawn mower does not move. Moreover, it is only necessary to manually set the test parameters before the test, and no human participation is required in the entire test process. The use of the test bench in the present application first saves manpower and time resources, and secondly reduces the interference of external factors on the experimental results, thereby improving the test accuracy. Moreover, the test bench has a simple structure, occupies a small area, and is easy to use and promote. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 The utility model is a schematic diagram of the overall structure of the lawn mower bump test bench provided by the utility model.
[0028] Figure 2 The utility model provides Figure 1 A local enlarged schematic diagram of point A in the middle.
[0029] Figure 3 The utility model provides Figure 1 A local enlarged schematic diagram of point B in the middle.
[0030] Figure 4 This is a schematic diagram of the connection between the tensioning member provided by the utility model and the handle of the lawn mower.
[0031] Reference numerals
[0032] Bumping platform 1; base 11; strip plate 12; walking mechanism 13; concave and convex surface 14; limit block 15; limit bracket 2; limit track 21; base 22; column 23; first guide rail 24; U-shaped bracket 25; tension spring 26; second guide rail 27; stud 28; pulling mechanism 3; power mechanism 31; rotating arm 32; telescopic arm 33; hinged end 34. DETAILED DESCRIPTION
[0033] The present invention will be further described in detail below in conjunction with specific implementations and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the present invention and its application.
[0034] like Figure 1 As shown, it is a schematic diagram of the overall structure of a lawn mower bump test bench provided in this embodiment, the test bench includes a bump table 1, a limit bracket 2 and a pulling mechanism 3. The bump table 1 is a panel structure, and the specific size can be selected according to the actual test situation; a walking mechanism 13 is provided at the bottom of the bump table 1, and the walking mechanism 13 includes existing conventional walking wheels. By arranging walking wheels at the bottom of the bump table 1, it is convenient for the bump table 1 to move during use. The upper part of the bump table 1 is a concave-convex surface 14. In this embodiment, the upper part is arranged as the concave-convex surface 14 to simulate a bumpy road surface; the limit bracket 2 is arranged on one side of the running direction of the bump table 1, and the limit bracket 2 includes a fixed frame and a limit rail 21. The fixed frame is a frame structure with a height not less than the overall height of the bump table 1 and the lawn mower. The fixed frame is fixed to the ground, and a locking device is provided thereon for locking the lawn mower to ensure that it is stable on the bump table 1. Mechanism, that is, in this embodiment, the lawn mower is fixed on the bumping platform 1 by a locking mechanism arranged on the fixed frame. It can be understood that the fixed position of the lawn mower should be in the same direction as the running direction of the bumping platform 1, so as to avoid the lawn mower tipping over during the bumping process. One end of the limiting track 21 is fixed on the fixed frame, and the other end, that is, the free end, extends to the bottom of the bumping platform 1 to limit the running wheels, ensuring that the running wheels of the bumping platform 1 move within a preset trajectory; the pulling mechanism 3 includes a power mechanism 31 and a crank arm connecting rod, and the pulling mechanism 3 is arranged on one side of the bumping platform 1. In this embodiment, the pulling mechanism 3 is preferably arranged on one side of the running direction of the bumping platform 1 and is arranged opposite to the limiting bracket 2. The crank arm connecting rod is connected between the power mechanism 31 and the bumping platform 1, and the power output by the power mechanism 31 can be transmitted to the bumping platform 1 through the crank arm connecting rod, thereby driving the bumping platform 1 to move back and forth.
[0035] In this embodiment, a limit block 15 extending along the running direction of the bumping platform 1 is preferably provided on the concave-convex surface at the upper end of the bumping platform 1 , and the limit block 15 is used to limit the position of the cutting machine on the bumping platform 1 .
[0036] When this embodiment is used, the lawn mower to be tested is fixed on the bumping platform 1 by a fixing frame, and then the pulling mechanism 3 is started to drive the bumping platform 1 to move in a specified direction. When the bumping platform 1 is running, it will move relative to the lawn mower. Before the test, the pulling frequency and pulling displacement of the pulling mechanism 3 can be adjusted according to the model of the lawn mower and the test requirements; when the operation reaches the specified length of time, the pulling mechanism 3 is closed, and the required indicators of the lawn mower are tested.
[0037] In summary, the present embodiment adopts the concave-convex surface 14 to simulate the existing conventional uneven road surface. At the same time, the test is carried out in a manner that the "road surface" moves while the lawn mower does not move, and it is only necessary to manually set the test parameters before the test, and the entire test process does not require human participation. The test bench of the present embodiment first saves manpower and time resources, and secondly, reduces the interference of external factors on the experimental results, improves the test accuracy, and the test bench has a simple structure, occupies a small area, and is easy to use and promote.
[0038] The bumping platform 1 comprises a base 11, on the upper part of which a plurality of strip plates 12 arranged in parallel are mounted, and a height difference exists between two adjacent strip plates 12 to form a concave-convex surface 14, or a height difference exists between several of the plurality of strip plates 12 arranged in parallel and other strip plates 12, and the height difference forms the concave-convex surface 14, such as Figure 2 shown.
[0039] In this embodiment, the strip plate body 12 is preferably a hardwood board. Of course, in other embodiments of the present application, the material of the strip plate body 12 can also be a material with higher hardness such as iron or stainless steel; in this embodiment, the width of each hardwood board is 85-95mm, preferably 90mm, and the spacing between two adjacent wooden boards is 9-11mm, preferably 10mm.
[0040] The height difference between two adjacent plate bodies 12 is 7-9 mm, preferably 8 mm. In order to form the height difference, two wooden boards of different thicknesses can be selected, or the height difference can be formed by adjusting the installation position of the wooden boards on the base 11. In this embodiment, two wooden boards of different thicknesses are preferably used to form the height difference, wherein the thickness of one group of wooden boards is selected to be 15-17 mm, and the thickness of the other group of wooden boards is selected to be 23-25 mm.
[0041] The power mechanism 31 on the pulling mechanism 3 is a driving motor, the speed of which is 21r / min, and the speed is adjusted by a controller; the crank arm connecting rod includes a rotating arm 32 and a telescopic arm, the rotating arm 32 is a crank structure, fixed on the output shaft of the power mechanism and can rotate with the output shaft, and the two ends of the telescopic arm are respectively hinged to the rotating arm 32 and the bumping platform 1, as shown in FIG. Figure 3As shown, the hinged end 34 is connected by a sleeve connection, and when the rotating arm 32 rotates, the telescopic arm will be driven to telescope and move, thereby driving the bumping platform 1 to reciprocate in a straight line trajectory; in this embodiment, the length of the telescopic arm is not less than 1000mm, and the length of the rotating arm 32 is not less than 200mm, so as to ensure that the reciprocating stroke of the bumping platform 1 is about 400mm, which meets the test requirements. The lawn mower to be tested in this embodiment is preferably a DIN 1873-1 lawn mower; in actual use, rotating arms 32 of different lengths can be installed as needed to adjust the movement stroke of the bumping platform 1. At the same time, the motor speed can be adjusted to achieve different operating speeds. The specific selection is determined according to the actual situation, and this embodiment is not limited here.
[0042] The fixing frame includes a base 22 and a column 23, wherein the column includes two columns, which are respectively installed at the two ends of the length direction of the base 22. The locking mechanism arranged on the fixing frame includes a first guide rail 24 and a tensioning member. The first guide rail 24 is horizontally arranged and its two ends are slidably fixed on the column 23 of the fixing frame. In this embodiment, the two ends of the first guide rail 24 are preferably sleeved on the column and locked and fixed by a bolt locking member. The tensioning member is fixed on the first guide rail 24. The first guide rail 24 can be used to adjust the displacement of the tensioning member relative to the bumping platform 1 in the vertical and / or horizontal direction, thereby adjusting the position of the lawn mower to be tested on the bumping platform 1.
[0043] The tensioning member includes a U-shaped bracket 25 and a tension spring 26. The U-shaped bracket 25 is fixed to the upper end of the first guide rail 24 through a slider and is vertically arranged relative to the first guide rail 24, that is, the length direction of the U-shaped bracket 25 is the same as the displacement direction of the bumping platform 1; the tension spring 26 includes two, which are respectively fixed on both sides of the U-shaped bracket 25, such as Figure 1 When in use, the two tension springs 26 are stretched relative to form a straight line, and the two tension springs 26 are fixed in the middle position of the handle of the lawn mower, such as Figure 4 As shown; In other embodiments of the present application, the U-shaped bracket 25 may also be arranged horizontally relative to the first guide rail 24. When in use, the two tension springs 26 may be respectively fixed to the two ends of the handle of the lawn mower.
[0044] In this embodiment, the tension spring 26 is fixed to the upper ends of both sides of the U-shaped bracket by the studs 28. Figure 4 As shown, the distance between the tension spring 26 and the inner side of the end of the U-shaped bracket can be adjusted by the stud 28, thereby improving the flexibility of using the tension spring 26; in addition, the tension spring 26 is selected as a fixing part of the lawn mower handle to avoid the disadvantages of traditional rigid connections.
[0045] As a preferred embodiment of the present application, a second guide rail 27 is provided on the fixed frame, and the second guide rail 27 is vertically arranged relative to the first guide rail 24, and the second guide rail 27 is fixed on the base 22 of the fixed frame. One side of the U-shaped bracket 25 of the tensioning member is connected to the second guide rail 27 through a slider. The setting of the second guide rail 27 can limit the running trajectory of the U-shaped bracket 25, and can also support the U-shaped bracket 25, thereby improving the stability of the operation of the U-shaped bracket 25 and ensuring the effective operation of the tensioning member in the vertical direction; it can be understood that the setting of the second guide rail 27 limits the movement of the U-shaped bracket 25 in the horizontal direction.
[0046] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several improvements can be made without departing from the premise of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A lawn mower bump test bench, characterized in that: include: A bumping platform, the lower part of which is provided with a walking mechanism, and the upper part of which is a concave-convex surface; A limit bracket, which is arranged on one side of the running direction of the bumping platform, and comprises a fixed frame and a limit track. The fixed frame is provided with a locking mechanism for locking the lawn mower to ensure that it is stable on the bumping platform, and the free end of the limit track extends to the bottom of the bumping platform to limit the walking mechanism; A pulling mechanism comprises a power mechanism and a crank arm connecting rod, and the pulling mechanism is arranged on one side of the bumping platform, the crank arm connecting rod is connected between the power mechanism and the bumping platform, and the power output by the power mechanism can be transmitted to the bumping platform through the crank arm connecting rod to drive the bumping platform to move back and forth.
2. The lawn mower bump test bench according to claim 1, characterized in that: The bumping platform includes a base, on the upper part of which are installed a plurality of strip plates arranged in parallel, with a height difference between two adjacent strip plates, or a height difference between several of the plurality of strip plates arranged in parallel and the other strip plates, and the height difference constitutes a concave-convex surface.
3. The lawn mower bump test bench according to claim 2, characterized in that: The height difference between two adjacent plate bodies is 7-9 mm, and the spacing between two adjacent plate bodies is 9-11 mm.
4. The lawn mower bump test bench according to claim 2, characterized in that: The width of the strip plate is 85-95 mm.
5. The lawn mower bump test bench according to claim 1, characterized in that: The fixing frame includes a base and a column. The locking mechanism arranged on the fixing frame includes a first guide rail and a tensioning member. The first guide rail is horizontally arranged and its two ends are slidably fixed on the column of the fixing frame. The tensioning member is fixed on the first guide rail. The first guide rail can be used to adjust the displacement of the tensioning member relative to the bumping platform in the vertical and / or horizontal direction.
6. The lawn mower bump test stand according to claim 5, characterized in that: The tensioning member includes a U-shaped bracket and a tension spring. The U-shaped bracket is fixed to the upper end of the first guide rail through a slider and is vertically arranged relative to the first guide rail. The tension spring includes two, which are respectively fixed on both sides of the U-shaped bracket.
7. The lawn mower bump test stand according to claim 6, characterized in that: The fixing frame is provided with a second guide rail, which is vertically arranged relative to the first guide rail. One side of the U-shaped bracket of the tensioning member is connected to the second guide rail through a sliding block.
8. The lawn mower bump test stand according to claim 6, characterized in that: The tension spring is fixed to the upper ends of both sides of the U-shaped bracket by studs, and the distance of the tension spring relative to the inner side of the end of the U-shaped bracket can be adjusted by the studs.
9. The lawn mower bump test stand according to claim 1, characterized in that: The crank arm connecting rod includes a rotating arm and a telescopic arm. The rotating arm is fixed on the output shaft of the power mechanism and can rotate with the output shaft. The telescopic arm is hinged to the rotating arm and the bump platform. When the rotating arm rotates, it will drive the telescopic arm to move telescopically and then drive the bump platform to make reciprocating motion in a straight line trajectory.
10. The lawn mower bump test stand according to claim 9, characterized in that: The length of the telescopic arm is not less than 1000 mm; the length of the rotating arm is not less than 200 mm.