Chassis height adjusting structure of riding type mower

Abstract

The utility model belongs to the technical field of mowers, and discloses a chassis height adjusting structure of a riding type mower, which comprises a frame, a mowing chassis arranged at the bottom of the frame and an adjusting device used for adjusting the height of the mowing chassis. The adjusting device comprises an output assembly installed on the frame and a control switch controlling the output assembly, the output assembly comprises a first driving part, an output rotating shaft installed on the first driving part in a driving mode and a driven shaft, and a transmission mechanism is connected between the output rotating shaft and the driven shaft. A driven shaft is arranged on the upper end of the base plate, a thread is arranged on the periphery of the driven shaft, a nut is connected to the periphery of the driven shaft in a threaded mode, a frame is arranged at the lower end of the nut, and the bottom of the frame is fixedly installed at the upper end of the mowing base plate. The lifting device has the advantages of being simpler in structure, lower in cost, more stable in the lifting process and larger in height adjusting range.

Description

Technical Field

[0001] The utility model belongs to the technical field of lawn mowers, in particular to a chassis height adjustment structure of a riding lawn mower. Background Art

[0002] With the increasing number of football lawns, park lawns, golf course lawns, school lawns, and community lawns. In order to facilitate the care and maintenance of lawns, people invented lawn mowers to complete large-scale lawn mowing, weeding, and other tasks. According to different usage occasions, lawn mowers are divided into push-type, mount-type, and handheld types. Riding lawn mowers are mainly composed of structures such as a frame, a mowing chassis, and walking wheels. The mowing chassis is equipped with motors, blades, and other mechanisms for mowing. In order to make the lawn mower better adapt to different mowing environments and make the lawn mower more applicable, it is often necessary to adjust the height of the mowing chassis, and for this purpose, a chassis height adjustment mechanism has been developed.

[0003] After searching, the publication number is: CN213694896U Chinese utility model patent, which includes a frame, a mowing chassis arranged at the bottom of the frame, and a height adjustment device. A first connecting rod is provided between the frame and the mowing chassis, and the two ends of the first connecting rod are respectively hinged with the frame and the mowing chassis. The height adjustment device includes a second connecting rod, an electric push rod, a distance sensor and a control switch. The second connecting rod is rotatably arranged on the frame, the lower end of the second connecting rod is hinged with the mowing chassis, and the upper end of the second connecting rod is hinged with the output end of the electric push rod; the distance sensor is arranged on the frame and corresponds to the mowing chassis. The distance sensor is electrically connected to the electric push rod. The distance sensor is used to measure the position change of the mowing chassis in the vertical direction; the control switch is electrically connected to the electric push rod, and the control switch is used to control the operation of the electric push rod.

[0004] The prior art uses a connecting rod mechanism to adjust the height of the mowing chassis. This adjustment method is relatively unstable and has a relatively small adjustable height range. In addition, the connecting rod mechanism has a complex structure, is troublesome to install, and has a high processing cost. Therefore, this shortcoming needs to be improved urgently. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems. The utility model provides a chassis height adjustment structure of a riding lawn mower, which has the advantages of a large adjustment range and low processing cost.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: it includes a frame, a lawn mowing chassis arranged at the bottom of the frame and an adjusting device for adjusting the height of the lawn mowing chassis, the adjusting device includes an output component installed on the frame and a control switch for controlling the output component, the output component includes a first driving member, an output shaft driven and installed on the first driving member, a transmission mechanism is installed at the other end of the output shaft, a driven shaft is installed at the other end of the transmission mechanism, a transmission mechanism is connected between the output shaft and the driven shaft, a thread is provided on the outer periphery of the driven shaft, a nut is threadedly connected to the outer periphery of the driven shaft, a frame is provided at the lower end of the nut, the bottom of the frame is fixedly installed on the upper end of the lawn mowing chassis, and the lawn mowing chassis and the frame are driven to rise and fall through the transmission between the driven shaft and the nut.

[0007] Preferably, the nut extends along the axis direction of the driven shaft toward a side away from the mowing chassis.

[0008] Preferably, a second driving member is installed on the frame, an output shaft is drivably installed on the second driving member, the output shaft is drivably connected to a transmission assembly, the transmission assembly includes a first transmission wheel connected to the output shaft and a second transmission wheel that drives a blade in the mowing chassis to rotate, the first transmission wheel and the second transmission wheel are connected by a belt or a chain, the first transmission wheel is provided with a sleeve sleeved on the outer periphery of the output shaft, the output shaft is slidably arranged in the sleeve, and the sleeve and the rotating shaft of the second transmission wheel are both rotatably mounted on the frame.

[0009] Preferably, the bushing has an axial hole corresponding to the output shaft connecting portion, and the axial hole and the cross section of the output shaft are non-circular cross sections, so that the bushing can be driven to rotate when the output shaft rotates.

[0010] Preferably, the frame has a connecting hole for installing the shaft sleeve and the rotating shaft of the second transmission wheel.

[0011] Preferably, rollers are provided at both ends of the mowing chassis.

[0012] Preferably, a box is installed on the frame, and the output assembly is installed in the box.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the forward and reverse rotation of the first driving member is controlled by controlling the switch to drive the forward and reverse rotation of the output shaft, the output gear, the driven gear and the driven shaft, and through the threaded connection between the driven shaft and the nut installed on the frame, the nut can be driven to rotate along the axis direction of the driven shaft while the driven shaft rotates, thereby realizing the lifting function of the mowing chassis, and the lifting function of the mowing chassis is realized through the transmission of the bevel gear set, the structure is simpler, the cost is lower, the lifting process is more stable, and the height adjustable range is larger. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 It is a side view structural schematic diagram of the utility model;

[0016] Figure 3 It is a side view structural schematic diagram of the utility model;

[0017] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of A;

[0018] Figure 5 for Figure 3 Schematic diagram of the enlarged structure of B;

[0019] Figure 6 Schematic diagram of the three-dimensional structure of the frame.

[0020] Description of the drawings: 1. Frame; 2. Control switch; 31. Mowing chassis; 32. Roller; 4. Transmission assembly; 41. First transmission wheel; 411. Bushing; 412. Shaft hole; 42. Second transmission wheel; 43. Third transmission wheel; 5. Frame; 51. Nut; 52. Connecting hole; 6. Second drive member; 61. Output shaft; 7. Box; 71. Cavity; 8. Output assembly; 81. First drive member; 82. Output shaft; 83. Output gear; 84. Driven gear; 85. Driven shaft. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1-Figure 6As shown, a chassis height adjustment structure of a riding lawn mower comprises a frame 1, a mowing chassis 31 arranged at the bottom of the frame 1 and an adjustment device for adjusting the height of the mowing chassis 31, the adjustment device comprises an output assembly 8 mounted on the frame 1 and a control switch 2 for controlling the output assembly 8, the control switch 2 is arranged on a panel on the side of the steering wheel of the frame, the output assembly 8 comprises a first driving member 81, an output shaft 82 and a driven shaft 85 driven and mounted on the first driving member 81, a transmission mechanism is connected between the output shaft 82 and the driven shaft 85, the transmission mechanism in this embodiment is a bevel gear set, the bevel gear set is composed of an output gear 83 mounted on the output shaft 82 and a driven gear 84 mounted on the driven shaft 85, the transmission mechanism can also be replaced by a worm gear transmission and a gear set in addition to the bevel gear set, the outer periphery of the driven shaft 85 is provided with a thread, The outer periphery of the driven shaft 85 is threadedly connected with a nut 51, and the nut 51 extends along the axis direction of the driven shaft 85 to the side away from the mowing chassis 31. The connection between the nut 51 and the driven shaft 85 is more stable, and the adjustable range is large, and the processing cost is lower. The nut 51 and the driven shaft 85 are arranged on the chassis of the frame 1, and a frame 5 is provided at the lower end of the nut 51. The bottom of the frame 5 is fixedly installed on the upper end of the mowing chassis 31. The output shaft 82 rotates to drive the output gear 83 to rotate, and then drives the driven gear 84 to rotate, and then drives the driven shaft 85 to rotate, and then drives the nut 51 to reciprocate along the axis direction of the driven shaft 85, so that the mowing chassis 31 can reciprocate along the axis direction of the driven shaft 85, thereby realizing the adjustment of the height between the mowing chassis 31 and the ground, and adjusting the lifting of the mowing chassis 31 by the forward and reverse rotation of the first driving member 81.

[0023] The frame 1 is provided with a second driving member 6, on which an output shaft 61 is driven and installed, and the output shaft 61 is drivingly connected to a transmission assembly 4, which includes a first transmission wheel 41 connected to the output shaft 61 and a second transmission wheel 42 for driving the blade in the mowing chassis 31 to rotate. The present embodiment also includes a third transmission wheel 43, which is used to be connected to another blade in the mowing chassis 31, so that the two blades in the mowing chassis 31 are driven to rotate by the rotation of the second transmission wheel 42 and the third transmission wheel 43, thereby improving the mowing efficiency. The first transmission wheel 41 is connected to the second transmission wheel 42 and the third transmission wheel 43 through a belt or chain. The first transmission wheel 41 is provided with a sleeve 411 sleeved on the outer periphery of the output shaft 61, and the output shaft 61 is slidably arranged in the sleeve 411. The sleeve 411 has an axial hole 412 corresponding to the connecting portion of the output shaft 61. The cross-sections of the axial hole 412 and the output shaft 61 are non-circular cross-sections. In this embodiment, the cross-sections of the axial hole 412 and the output shaft 61 are matched squares, so that when the output shaft 61 rotates, the sleeve 411 can be driven to rotate. The rotating shafts of the sleeve 411, the second transmission wheel 42 and the third transmission wheel 43 are all rotatably installed on the frame 5, and the distances between the first transmission wheel 41, the second transmission wheel 42 and the third transmission wheel 43 and the frame 5 remain unchanged.

[0024] In the present application, the first driving member 81 and the second driving member 6 are both electric motors.

[0025] The frame 5 has a connecting hole 52 for installing the shaft of the sleeve 411 and the second transmission wheel 42 and the third transmission wheel 43. By installing the sleeve 411, the second transmission wheel 42 and the third transmission wheel 43 on the frame 5, the sleeve 411, the second transmission wheel 42 and the third transmission wheel 43 can move back and forth with the frame 5. The output shaft 61 can be slidably connected in the sleeve 411. Therefore, when the frame 5 is at any height above the ground, the rotation of the output shaft 61 can always drive the sleeve 411 to rotate, and then drive the first transmission wheel 41 to rotate. In this embodiment, the first transmission wheel 41, the second transmission wheel 42 and the third transmission wheel 43 are pulleys or sprockets.

[0026] A box body 7 for protecting the output assembly 8 is installed on the frame 1 . The box body 7 has a cavity 71 inside. The output assembly 8 is installed in the cavity 71 , so as to prevent dust and grass clippings from adhering to the output assembly 8 .

[0027] Rollers 32 are provided at both ends of the mowing chassis 31 so that the mowing chassis 31 can move better when it is close to the ground.

[0028] When adjusting the height: by operating the first driving member 81 on the control switch 2 to rotate forward and reverse, the output shaft 82 is driven to rotate, and then the output gear 83 is driven to rotate, and then the driven gear 84 is driven to rotate, and then the driven shaft 85 is driven to rotate, and then the nut 51 is driven to reciprocate along the axis direction of the driven shaft 85, so that the mowing chassis 31 can reciprocate along the axis direction of the driven shaft 85, so as to adjust the height between the mowing chassis 31 and the ground, and the output shaft 61 is always kept in a connected state in the shaft hole 412, so when the second driving member 6 is started to mow the grass, the output shaft 61 can also drive the first transmission wheel 41 on the sleeve 411 to rotate, and then the second transmission wheel 42 and the third transmission wheel 43 are driven to rotate through the belt, so that the two blades in the mowing chassis 31 can mow the grass.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A chassis height adjustment structure for a riding lawn mower, comprising a frame (1), a lawn mowing chassis (31) arranged at the bottom of the frame (1), and an adjustment device for adjusting the height of the lawn mowing chassis (31), the adjustment device comprising an output assembly (8) mounted on the frame (1) and a control switch (2) for controlling the output assembly (8), characterized in that: The output assembly (8) comprises a first driving member (81), an output rotating shaft (82) drivingly mounted on the first driving member (81), a transmission mechanism being mounted on the other end of the output rotating shaft (82), a driven shaft (85) being mounted on the other end of the transmission mechanism, a thread being arranged on the outer circumference of the driven shaft (85), a nut (51) being threadedly connected to the outer circumference of the driven shaft (85), a frame (5) being arranged at the lower end of the nut (51), the bottom of the frame (5) being fixedly mounted on the upper end of the mowing chassis (31), and the mowing chassis (31) and the frame (5) being driven to rise and fall through the transmission between the driven shaft (85) and the nut (51).

2. The chassis height adjustment structure of a riding lawn mower according to claim 1, characterized in that: The nut (51) extends along the axis direction of the driven shaft (85) toward a side away from the mowing chassis (31).

3. The chassis height adjustment structure of a riding lawn mower according to claim 1, characterized in that: A second driving member (6) is mounted on the frame (1), an output shaft (61) is drivingly mounted on the second driving member (6), the output shaft (61) is drivingly connected to a transmission assembly (4), the transmission assembly (4) comprising a first transmission wheel (41) connected to the output shaft (61) and a second transmission wheel (42) for driving a blade in the mowing chassis (31) to rotate, the first transmission wheel (41) and the second transmission wheel (42) being connected via a belt or a chain, the first transmission wheel (41) being provided with a shaft sleeve (411) sleeved on the outer periphery of the output shaft (61), the output shaft (61) being slidably disposed in the shaft sleeve (411), and the shafts of the shaft sleeve (411) and the second transmission wheel (42) are both rotatably mounted on the frame (5).

4. The chassis height adjustment structure of a riding lawn mower according to claim 3, characterized in that: The shaft sleeve (411) has a shaft hole (412) corresponding to the connecting portion of the output shaft (61); the shaft hole (412) and the output shaft (61) have non-circular cross-sections, so that the shaft sleeve (411) can be driven to rotate when the output shaft (61) rotates.

5. The chassis height adjustment structure of a riding lawn mower according to claim 4, characterized in that: The frame (5) has a connecting hole (52) for mounting the shaft sleeve (411) and the rotating shaft of the second transmission wheel (42).

6. The chassis height adjustment structure of a riding lawn mower according to claim 1, characterized in that: Rollers (32) are provided at both ends of the mowing chassis (31).

7. The chassis height adjustment structure of a riding lawn mower according to claim 1, characterized in that: A box body (7) is mounted on the vehicle frame (1), and the output assembly (8) is mounted inside the box body (7).

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