Pruning shears with damping and cooling functions

Abstract

The invention discloses a pair of pruning shears with damping and cooling functions, belongs to the technical field of gardening tools, solves the problems that the pruning shears in the prior art are large in vibration and prone to heating, and adopts the technical scheme that the pruning shears mainly comprise a gear box, a gear assembly, a connecting rod assembly and a supporting pad, and the gear assembly, the connecting rod assembly and the supporting pad are arranged in the gear box; the connecting rod assembly is connected with the gear assembly, the supporting pad is arranged between the connecting rod assembly and a shell of the gearbox and used for supporting the connecting rod assembly, an installation shaft is arranged on the shell of the gearbox, the supporting pad is installed on the installation shaft in a sliding mode, and a spring is arranged on an installation rod in a sleeving mode. The two ends of the spring abut against the supporting pad and a shell of the gearbox respectively, and the supporting pad has the tendency to be separated from the shell of the gearbox under the elastic force effect of the spring. Damping and cooling of the pruning shears are achieved, and the use experience of an operator is improved.

Description

Technical Field

[0001] The invention relates to the technical field of garden tools, in particular to a pair of pruning shears with shock-absorbing and temperature-reducing functions. Background Art

[0002] Pruning shears are a common garden tool, mainly used for pruning tree branches, hedges and other plants. For example, utility model patents CN203023421U and CN204968659U in the prior art both disclose pruning shears, including gears, eccentric wheels and connecting rods. Power is transmitted to the eccentric wheels through gears, and the eccentric wheels drive the connecting rods to move, thereby driving the blades to reciprocate with each other to achieve pruning. In order to support the connecting rod, a gasket is provided between the connecting rod and the housing of the gear box. The gasket and the housing of the gear box are usually fixedly connected. The vibration generated by the connecting rod is transmitted to the gear box through the gasket, affecting the operator's grip. At the same time, the heat on the connecting rod is transmitted to the gear box through the gasket. After long-term use, the temperature of the gear box is high, and the operator's experience is poor. Summary of the invention

[0003] The purpose to be achieved by the present invention is to provide a pruning shear with shock absorption and cooling function, which solves the problem that the pruning shear in the prior art has large vibration and is easy to generate heat, realizes shock absorption and cooling, and improves the operator's use experience.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a pruning shear with shock-absorbing and cooling functions, comprising a gear box and a gear assembly, a connecting rod assembly and a support pad arranged in the gear box, the connecting rod assembly and the gear assembly are connected, the support pad is arranged between the connecting rod assembly and the housing of the gear box and is used to support the connecting rod assembly, the housing of the gear box is provided with a mounting shaft, the support pad is slidably installed on the mounting shaft, the mounting shaft is sleeved with a spring, the two ends of the spring are respectively set to resist the support pad and the housing of the gear box, and the support pad has a tendency to remain separated from the housing of the gear box under the elastic force of the spring.

[0005] After adopting the above technical scheme, the present invention has the following advantages: the support pad is arranged to be against the housing of the gear box through a spring. When the connecting rod assembly generates vibration during work, the spring can absorb this part of the vibration energy, thereby effectively reducing the vibration transmitted to the gear box and other components, and playing a shock absorbing function. At the same time, the support pad can move up and down, reducing the hard contact between the connecting rod assembly and the support pad, reducing frictional heat and vibration, and the setting of the spring can also reduce the direct contact between the connecting rod assembly and the housing of the gear box, reducing the transmission of heat and vibration, achieving the effect of heat reduction and shock absorption, slowing down the heating rate of the gear box housing, and improving the operator's experience.

[0006] Furthermore, a heat insulating sleeve is provided between the mounting shaft and the support pad.

[0007] By adopting the above-mentioned technical solution, the thermal insulation sleeve can effectively block the heat conduction path, reduce the heat transferred from the support pad to the mounting shaft, thereby reducing the heat transferred to the gear box housing through the mounting shaft, and further slowing down the heating rate of the gear box. At the same time, the thermal insulation sleeve can be made of elastic material, which can provide additional buffering effect between the support pad and the mounting shaft, and can further reduce the impact of the vibration generated by the connecting rod assembly during operation on the gear box.

[0008] Furthermore, the support pad is fixedly connected to the heat insulation sleeve, and the heat insulation sleeve is slidably mounted on the mounting shaft.

[0009] By adopting the above-mentioned technical solution, the support pad can slide relative to the installation shaft while ensuring that the support pad and the installation shaft are always separated by the heat insulation sleeve.

[0010] Furthermore, the insulation sleeve is provided with a step structure in the radial direction, and the mounting shaft is provided with a radially protruding stop rib for limiting excessive sliding of the insulation sleeve, and the stop rib abuts against the step structure to keep the support pad and the gear box housing separated.

[0011] By adopting the above-mentioned technical solution, the cooperation between the stop rib and the step structure can ensure the accurate position of the insulation sleeve on the installation shaft, prevent it from excessively sliding in the axial direction, and ensure that the connecting rod assembly can work stably.

[0012] Furthermore, the height of the heat insulation sleeve is not higher than the surface height of the support pad used to support the connecting rod assembly.

[0013] By adopting the above-mentioned technical solution, the height of the insulation sleeve is lower than or equal to the supporting surface of the supporting pad, which can reduce the interference with the movement trajectory of the connecting rod assembly and avoid the poor movement caused by the height difference.

[0014] Furthermore, the support pad is provided with a through hole that is slidably matched with the mounting shaft, and the height of the mounting shaft is not higher than the surface height of the support pad for supporting the connecting rod assembly.

[0015] By adopting the above-mentioned technical solution, the height of the mounting shaft is relatively low, which can reduce the interference with the movement of the connecting rod assembly, and further ensure that the connecting rod assembly can move smoothly along the predetermined trajectory during operation.

[0016] Furthermore, the housing of the gear box is provided with a limiting rib extending along the axial direction of the mounting shaft, and the limiting rib is located between the support pad and the housing of the gear box to limit the sliding amount of the support pad relative to the mounting shaft.

[0017] By adopting the above-mentioned technical solution, the limiting rib can limit the sliding amount of the support pad, ensuring that the support pad will not slide excessively, causing the height of the mounting shaft to be higher than the surface height of the support pad used to support the connecting rod assembly.

[0018] Furthermore, the limiting ribs are arranged along the circumferential direction of the spring to limit the radial movement of the spring.

[0019] By adopting the above-mentioned technical solution, the limiting ribs limit the sliding amount of the support pad relative to the installation shaft and at the same time limit the radial movement of the spring to ensure that it is always in the correct working position, thereby ensuring the shock-absorbing and heat-reducing effect.

[0020] Furthermore, at least two installation shafts are provided, and at least two installation shafts are arranged at intervals. The support pad is slidably installed on at least two installation shafts, and each installation shaft is provided with a spring.

[0021] By adopting the above-mentioned technical solution, multiple installation axes can provide better support, making the support pad more stable, reducing the shaking or deviation that may be caused by a single axis, and each installation axis is provided with a spring to better absorb vibration and impact force.

[0022] Furthermore, the installation shaft is threadedly connected to the housing of the gear box or plug-fitted or latched.

[0023] The above technical solution is adopted. Since the heat insulation sleeve and the spring are prone to failure after long-term use, the installation shaft is connected to the housing of the gear box by thread, plug-in or latch, which is convenient for disassembly and replacement and later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings:

[0025] Figure 1 It is a structural schematic diagram of the pruning shears with shock absorption and temperature reduction function in the present invention;

[0026] Figure 2 For the present invention Figure 1 A magnified view of the structure at center A;

[0027] Figure 3 It is a cross-sectional view of the driving mechanism of the pruning shears with the function of damping and cooling in the present invention;

[0028] Figure 4 For the present invention Figure 3 A magnified view of the structure at B in the middle;

[0029] Figure 5 An exploded view of the pruning shears with shock-absorbing and temperature-reducing functions of the present invention;

[0030] In the figure, 10, gear box; 101, limit rib; 102, upper shell; 103, lower shell; 11, motor; 12, first gear; 13, second gear; 14, eccentric wheel; 15, moving blade; 20, connecting rod; 30, support pad; 301, through hole; 302, mounting rib; 40, mounting shaft; 401, stop rib; 41, spring; 42, thermal insulation sleeve; 421, slot; 422, step structure; 50, gap; 60, shock-absorbing pad. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein.

[0033] It should be understood that in various embodiments of the present invention, the size of the serial numbers of the processes does not mean the order of execution. The execution order of the processes should be determined by their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0034] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0035] It should be understood that in the present invention, "plurality" refers to two or more than two. "And / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included.

[0036] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0037] like Figures 1 to 5 As shown, the present invention provides a pruning shear with shock-absorbing and cooling functions, including a blade assembly, a power assembly, a gear box 10, and a gear assembly, a connecting rod assembly and a support pad 30 arranged in the gear box 10. The connecting rod assembly and the gear assembly are connected. The support pad 30 is arranged between the connecting rod assembly and the housing of the gear box 10 and is used to support the connecting rod assembly. The housing of the gear box 10 is provided with a mounting shaft 40, and the support pad 30 is slidably mounted on the mounting shaft 40. A spring 41 is sleeved on the mounting shaft 40. The two ends of the spring 41 are respectively set against the support pad 30 and the housing of the gear box 10. The support pad 30 has a tendency to keep away from the housing of the gear box 10 under the elastic force of the spring 41. It can also eliminate the assembly problem caused by the precision of machined parts, and there will be no interference and jamming between the connecting rod assembly and the gear box 10.

[0038] The support pad 30 is arranged to be against the housing of the gear box 10 through the spring 41. When the connecting rod assembly vibrates during work, the spring 41 can absorb this part of the vibration energy, thereby effectively reducing the vibration transmitted to the gear box 10 and other components, and playing a shock absorbing function. At the same time, the support pad 30 can move up and down, reducing the hard contact between the connecting rod assembly and the support pad 30, reducing frictional heat and vibration. The setting of the spring 41 can also reduce the direct contact between the connecting rod assembly and the housing of the gear box 10, reducing the transmission of heat and vibration, achieving the effect of heat reduction and shock absorption, slowing down the heating rate of the housing of the gear box 10, and improving the operator's experience, thereby enabling long-term use of the pruning shears.

[0039] It should be noted that, in a natural state, a gap 50 is formed between the support pad 30 and the housing of the gear box 10 under the elastic force of the spring 41 .

[0040] Among them, the power assembly includes a motor 11, the gear assembly includes a first gear 12 arranged on the output shaft of the motor 11 and a second gear 13 meshing with the first gear 12, the diameter of the first gear 12 is smaller than the diameter of the second gear 13, and the second gear 13 is connected to eccentric wheels 14 on both axial sides, the blade assembly includes two moving blades 15, and the connecting rod assembly includes two connecting rods 20, one end of the two connecting rods 20 is hinged to the two eccentric wheels 14 respectively, and the other end of the two connecting rods 20 is hinged to the two moving blades 15 respectively, so as to drive the two moving blades 15 to reciprocate with each other to achieve shearing.

[0041] Since the heat and vibration of the support pad 30 can be transferred from the mounting shaft 40 to the gear box 10, in this embodiment, a heat insulating sleeve 42 is provided between the mounting shaft 40 and the support pad 30. The heat insulating sleeve 42 can effectively block the heat conduction path, reduce the heat transfer from the support pad 30 to the mounting shaft 40, thereby reducing the heat transfer to the housing of the gear box 10 through the mounting shaft 40, further slowing down the heating rate of the gear box 10, and at the same time, the heat insulating sleeve 42 can be made of elastic material, which can provide additional buffering between the support pad 30 and the mounting shaft 40, and can further reduce the impact of the vibration generated when the connecting rod assembly is working and transferred to the gear box 10.

[0042] Preferably, the heat insulating sleeve 42 can be a POM sleeve. The POM sleeve is a poor conductor of heat and can effectively play a role of heat insulation. The POM sleeve has a certain elasticity and can effectively play a role of shock absorption.

[0043] Among them, the support pad 30 is provided with a through hole 301 that slides with the installation shaft 40. The support pad 30 is fixedly connected to the insulation sleeve 42. The insulation sleeve 42 can extend into the through hole 301. The insulation sleeve 42 is slidably installed on the installation shaft 40, so that the support pad 30 can slide relative to the installation shaft 40 while ensuring that the support pad 30 and the installation shaft 40 are always separated by the insulation sleeve 42.

[0044] Specifically, a card slot 421 is provided on the heat insulation sleeve 42 , and a mounting rib 302 is provided on the shell of the through hole 301 . The card slot 421 is injection-molded and fixed in the mounting rib 302 , thereby realizing the connection between the heat insulation sleeve 42 and the support pad 30 .

[0045] In order to avoid interference with the connecting rod assembly, the height of the heat insulating sleeve 42 is not higher than the surface height of the support pad 30 used to support the connecting rod assembly. The height of the heat insulating sleeve 42 is lower than or equal to the support surface of the support pad 30, which can reduce interference with the movement trajectory of the connecting rod assembly and avoid poor movement due to height differences. The spring 41 and the connecting rod assembly are located on different sides of the support pad 30.

[0046] Furthermore, the height of the mounting shaft 40 is not higher than the surface height of the support pad 30 for supporting the connecting rod assembly. The lower height of the mounting shaft 40 can reduce interference with the movement of the connecting rod assembly, further ensuring that the connecting rod assembly can move smoothly along a predetermined trajectory during operation.

[0047] To this end, a step structure 422 is provided in the radial direction of the heat insulating sleeve 42, and a stop rib 401 is provided on the mounting shaft 40 to protrude radially and limit excessive sliding of the heat insulating sleeve 42, and the stop rib 401 contacts the step structure 422 to keep the support pad 30 and the housing of the gear box 10 separated, thereby preventing excessive sliding in the axial direction and ensuring that the connecting rod assembly can work stably.

[0048] Furthermore, the housing of the gearbox 10 is provided with a limiting rib 101 extending along the axial direction of the mounting shaft 40, and the limiting rib 101 is located between the support pad 30 and the housing of the gearbox 10 to limit the sliding amount of the support pad 30 relative to the mounting shaft 40. It is ensured that the support pad 30 will not slide excessively, causing the height of the mounting shaft 40 to be higher than the surface height of the support pad 30 used to support the connecting rod assembly.

[0049] In order to reduce the radial bending of the spring 41 and thus affect the shock-absorbing and heat-reducing effects, the limiting ribs 101 are arranged along the circumferential direction of the spring 41 to limit the radial movement of the spring 41, thereby ensuring that it is always in the correct working position and guaranteeing the shock-absorbing and heat-reducing effects.

[0050] In order to improve the stability of the support pad 30, at least two mounting shafts 40 are provided, and at least two mounting shafts 40 are arranged at intervals. The support pad 30 is slidably installed on at least two mounting shafts 40, and each mounting shaft 40 is provided with a spring 41. Preferably, there are four mounting shafts 40, and multiple mounting shafts 40 can provide better support, making the support pad 30 more stable, reducing the shaking or deviation that may be caused by a single shaft, and the spring 41 on each mounting shaft 40 can better absorb vibration and impact. The four mounting shafts 40 are located at the four corners of the support pad 30, which can better provide a stable support effect for the support pad 30, and at the same time, the mounting shafts 40 are located at the edge of the support pad 30 to reduce interference with the connecting rod assembly.

[0051] Since the heat insulating sleeve 42 and the spring 41 are prone to failure after long-term use, in this embodiment, the mounting shaft 40 is threadedly connected to the housing of the gear box 10, which is convenient for disassembly and replacement and for later maintenance.

[0052] The housing of the gearbox 10 includes an upper housing 102 and a lower housing 103, the upper housing 102 and the lower housing 103 are connected by screws, the support pad 30 is located between the upper housing 102 and the lower housing 103, the support pad 30 is close to one of the upper housing 102 and the lower housing 103, and the mounting shaft 40 is located on the housing close to the support pad 30. A shock absorbing pad 60 is also provided in the gearbox 10, and the shock absorbing pad 60 is located between the upper housing 102 and the lower housing 103.

[0053] It can be understood that in other embodiments, the blade assembly may also include a movable blade and a fixed blade, and the fixed blade is fixed on the pruning shears. Only an eccentric wheel and a connecting rod need to be provided to drive the movable blade to move relative to the fixed blade to achieve shearing.

[0054] It can be understood that in other embodiments, the support pad is slidably mounted on the thermal insulation sleeve, and the thermal insulation sleeve is fixedly connected to the mounting shaft.

[0055] It can be understood that in other embodiments, the mounting shaft and the housing of the gear box are plug-in or latch-fitted to facilitate disassembly and replacement.

[0056] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A pruning shear with a shock-absorbing and cooling function, comprising a gear box (10) and a gear assembly, a connecting rod assembly and a support pad (30) arranged in the gear box (10), wherein the connecting rod assembly and the gear assembly are connected, and the support pad (30) is arranged between the connecting rod assembly and the housing of the gear box (10) and is used to support the connecting rod assembly, characterized in that: The housing of the gear box (10) is provided with a mounting shaft (40), the support pad (30) is slidably mounted on the mounting shaft (40), a spring (41) is sleeved on the mounting shaft (40), two ends of the spring (41) are respectively arranged to abut against the support pad (30) and the housing of the gear box (10), and the support pad (30) has a tendency to remain separated from the housing of the gear box (10) under the elastic force of the spring (41).

2. The pruning shears with shock absorption and temperature reduction function according to claim 1, characterized in that: A heat insulation sleeve (42) is provided between the installation shaft (40) and the support pad (30).

3. The pruning shears with shock absorption and temperature reduction function according to claim 2, characterized in that: The support pad (30) is fixedly connected to the heat insulation sleeve (42), and the heat insulation sleeve (42) is slidably mounted on the mounting shaft (40).

4. The pruning shears with shock absorption and temperature reduction function according to claim 3, characterized in that: The heat insulation sleeve (42) is provided with a step structure (422) in the radial direction, and the mounting shaft (40) is provided with a stop rib (401) which protrudes radially and is used to limit excessive sliding of the heat insulation sleeve (42), and the stop rib (401) abuts against the step structure (422) to maintain the separation between the support pad (30) and the housing of the gear box (10).

5. The pruning shears with shock absorption and temperature reduction function according to claim 2, characterized in that: The height of the heat insulation sleeve (42) is not higher than the surface height of the support pad (30) used to support the connecting rod assembly.

6. The pruning shears with shock absorption and temperature reduction function according to claim 1, characterized in that: The support pad (30) is provided with a through hole (301) that is slidably matched with the mounting shaft (40), and the height of the mounting shaft (40) is not higher than the surface height of the support pad (30) used to support the connecting rod assembly.

7. The pruning shears with shock absorption and temperature reduction function according to claim 6, characterized in that: The housing of the gear box (10) is provided with a limiting rib (101) extending along the axial direction of the mounting shaft (40); the limiting rib (101) is located between the support pad (30) and the housing of the gear box (10) to limit the sliding amount of the support pad (30) relative to the mounting shaft (40).

8. The pruning shears with shock absorption and temperature reduction function according to claim 7, characterized in that: The limiting ribs (101) are arranged along the circumferential direction of the spring (41) to limit the radial movement of the spring (41).

9. The pruning shears with shock absorption and temperature reduction function according to claim 1, characterized in that: At least two of the installation shafts (40) are provided, and the at least two installation shafts (40) are arranged at intervals. The support pad (30) is slidably installed on the at least two installation shafts (40), and each of the installation shafts (40) is provided with a spring (41).

10. The pruning shears with shock absorption and temperature reduction function according to claim 1, characterized in that: The installation shaft (40) is threadedly connected, plug-fitted, or latch-connected to the housing of the gear box (10).

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