Pruning shears with damping and cooling functions

Abstract

The utility model discloses a pair of pruning shears with damping and cooling functions, which belongs to the technical field of gardening tools, solves the problems that the pruning shears in the prior art are large in vibration and easy to heat, 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, 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 utility model relates to garden tool technical field, especially a kind of pruning shears with shock-absorbing cooling function. BACKGROUND

[0002] Pruning shears belong to a kind of common garden tools, mainly used for pruning tree branches, hedge and other plants, such as prior art utility model patent CN203023421U and CN204968659U both disclose pruning shears, including gear, eccentric wheel and connecting rod, power is transmitted to eccentric wheel through gear, eccentric wheel drives connecting rod to move, so as to drive blade to reciprocate, realize pruning, in order to support connecting rod, gasket is provided between connecting rod and the shell of gear box, gasket and the shell of gear box are usually fixedly connected, vibration generated by connecting rod is transmitted to gear box through gasket, affect operator's grip, at the same time, heat on connecting rod is transmitted to gear box through gasket, the temperature of gear box is higher after long time use, operator's use experience is poor. SUMMARY

[0003] The utility model wants to achieve the purpose is to provide a kind of pruning shears with shock-absorbing cooling function, solve the problem that the vibration of pruning shears in prior art is larger and prone to heating, realize shock-absorbing cooling, improve operator's use experience.

[0004] In order to achieve the above object, the utility model adopts the following technical scheme: a kind of pruning shears with shock-absorbing cooling function, including gear box and the gear assembly, connecting rod assembly and support pad in gear box, the connecting rod assembly and gear assembly are connected, the support pad is located between connecting rod assembly and the shell of gear box and is used to support connecting rod assembly, installation shaft is provided on the shell of gear box, the support pad is slidably installed on installation shaft, spring is sleeved on installation shaft, the both ends of spring are respectively arranged with support pad and the shell of gear box, the support pad has the tendency to keep away from the shell of gear box under the elastic force of spring.

[0005] After adopting the above technical scheme, the utility model has the following advantages: the support pad is arranged with the shell of gear box by spring, when vibration is generated in connecting rod assembly during work, spring can absorb this part of vibration energy, thereby effectively reducing vibration transmission to gear box and other components, play shock-absorbing function, at the same time, the support pad can move up and down, reduce the hard contact of connecting rod assembly and support pad, reduce friction heating and vibration, the setting of spring can also reduce the direct contact between connecting rod assembly and the shell of gear box, reduce the transmission of heat and vibration, achieve the effect of heat reduction and shock absorption, slow down the temperature rising speed of the shell of gear box, can improve operator's use experience.

[0006] Further, heat insulation sleeve is provided between the installation shaft and the support pad.

[0007] By adopting the aforementioned technical solution, the heat insulation sleeve can effectively block the heat conduction path, reduce the heat transfer from the support pad to the mounting shaft, thereby reducing the heat transfer from the mounting shaft to the gearbox housing, further slowing down the gearbox's heating rate. At the same time, the heat insulation sleeve can be made of elastic material, which can provide additional cushioning between the support pad and the mounting shaft, further reducing the impact of vibrations generated during the operation of the connecting rod assembly on the gearbox.

[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 aforementioned technical solution, the support pad can slide relative to the mounting shaft while ensuring that the support pad and the mounting shaft are always separated by the heat insulation sleeve.

[0010] Furthermore, the heat insulation sleeve has a stepped structure in the radial direction, and the mounting shaft has a radially protruding stop rib for limiting excessive sliding of the heat insulation sleeve. The stop rib abuts against the stepped structure to keep the support pad and the gearbox housing separated.

[0011] By adopting the aforementioned technical solution, the cooperation between the stop rib and the stepped structure can ensure the accurate position of the heat insulation sleeve on the mounting shaft, prevent it from sliding excessively 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 aforementioned technical solution, the height of the heat insulation sleeve is lower than or equal to the support surface of the support pad, which can reduce interference with the movement trajectory of the linkage assembly and avoid movement obstruction caused by height differences.

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

[0015] By adopting the aforementioned technical solution, the height of the mounting shaft is lower, which can reduce interference with the movement of the linkage assembly and further ensure that the linkage assembly can move smoothly along the predetermined trajectory during operation.

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

[0017] Using the aforementioned technical solution, the limiting rib can restrict the sliding amount of the support pad, ensuring that the support pad will not cause the height of the mounting shaft to be higher than the surface height of the support pad used to support the connecting rod assembly due to excessive sliding.

[0018] Furthermore, the limiting ribs are arranged along the circumference of the spring to restrict the radial movement of the spring.

[0019] By adopting the aforementioned technical solution, the limiting ribs not only restrict the sliding amount of the support pad relative to the mounting shaft, but also limit the radial movement of the spring, ensuring that it is always in the correct working position and guaranteeing the shock absorption and heat reduction effect.

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

[0021] By adopting the aforementioned technical solution, multiple mounting shafts can provide better support, making the support pad more stable, reducing the swaying or displacement that may be caused by a single shaft, and each mounting shaft is equipped with a spring, which can better absorb vibration and impact.

[0022] Furthermore, the mounting shaft is threaded, plugged in, or pin-connected to the housing of the gearbox.

[0023] The aforementioned technical solution is adopted. Since the heat insulation sleeve and spring are prone to failure after long-term use, the mounting shaft is connected to the gearbox housing by thread, plug, or pin, which facilitates disassembly and replacement and makes later maintenance easier. Attached Figure Description

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

[0025] Figure 1 This is a schematic diagram of the pruning shears with shock absorption and cooling functions in this utility model;

[0026] Figure 2 In this utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0027] Figure 3 This is a cross-sectional view of the pruning shear drive mechanism with shock absorption and cooling function in this utility model.

[0028] Figure 4 In this utility model Figure 3 Enlarged view of the structure at point B;

[0029] Figure 5 This is an exploded view of the pruning shears with shock absorption and cooling functions in this utility model;

[0030] In the diagram, 10 is the gearbox; 101 is the limiting rib; 102 is the upper housing; 103 is the lower housing; 11 is the motor; 12 is the first gear; 13 is the second gear; 14 is the eccentric wheel; 15 is the moving blade; 20 is the connecting rod; 30 is the support pad; 301 is the through hole; 302 is the mounting rib; 40 is the mounting shaft; 401 is the stop rib; 41 is the spring; 42 is the heat insulation sleeve; 421 is the slot; 422 is the stepped structure; 50 is the gap; and 60 is the shock-absorbing pad. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

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

[0033] It should be understood that in the various embodiments of this utility model, the number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this utility model.

[0034] It should be understood that in this invention, "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product or device.

[0035] It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, or Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Contains X, Y, and Z", "Contains X, Y, and Z" means that all three X, Y, and Z are contained; "Contains X, Y, or Z" means that one of X, Y, and Z is contained; "Contains X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are contained.

[0036] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0037] like Figures 1 to 5 As shown, this utility model provides a pruning shear with shock absorption and cooling functions, including a blade assembly, a power assembly, a gearbox 10, and a gear assembly, a connecting rod assembly, and a support pad 30 disposed within the gearbox 10. The connecting rod assembly and the gear assembly are connected. The support pad 30 is disposed between the connecting rod assembly and the housing of the gearbox 10 and is used to support the connecting rod assembly. The housing of the gearbox 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. The two ends of the spring 41 are respectively abutted against the support pad 30 and the housing of the gearbox 10. Under the elastic force of the spring 41, the support pad 30 tends to remain detached from the housing of the gearbox 10. This also eliminates assembly problems caused by the precision of machined parts, and prevents interference or jamming between the connecting rod assembly and the gearbox 10.

[0038] The support pad 30 is set against the housing of the gearbox 10 by a spring 41. When the connecting rod assembly vibrates during operation, the spring 41 can absorb this vibration energy, thereby effectively reducing the vibration transmitted to the gearbox 10 and other components, and playing a shock absorption function. At the same time, the support pad 30 can move up and down to reduce 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 gearbox 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 gearbox 10, improving the user experience of the operator, and thus enabling long-term use of the pruning shears.

[0039] It should be noted that, under normal conditions, the support pad 30 has a gap 50 between it and the housing of the gearbox 10 under the elastic force of the spring 41.

[0040] The power assembly includes a motor 11, the gear assembly includes a first gear 12 mounted 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. Eccentric wheels 14 are connected to both axial sides of the second gear 13. The blade assembly includes two moving blades 15, and the connecting rod assembly includes two connecting rods 20. One end of each connecting rod 20 is hinged to one of the two eccentric wheels 14, and the other end of each connecting rod 20 is hinged to one of the two moving blades 15, so as to drive the two moving blades 15 to reciprocate each other to achieve shearing.

[0041] Since heat and vibration from the support pad 30 can be transferred to the gearbox 10 from the mounting shaft 40, a heat insulation sleeve 42 is provided between the mounting shaft 40 and the support pad 30 in this embodiment. The heat insulation 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 gearbox 10 through the mounting shaft 40, further slowing down the heating rate of the gearbox 10. At the same time, the heat insulation sleeve 42 can be made of an elastic material, which can provide additional cushioning between the support pad 30 and the mounting shaft 40, further reducing the impact of vibrations generated during the operation of the connecting rod assembly on the gearbox 10.

[0042] Preferably, the heat insulation sleeve 42 can be a POM sleeve. POM sleeves are poor conductors of heat, effectively providing heat insulation, and POM sleeves have a certain degree of elasticity, effectively providing shock absorption.

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

[0044] Specifically, the heat insulation sleeve 42 is provided with a slot 421, and the housing with the through hole 301 is provided with an installation rib 302. The slot 421 is injection molded and fixed in the installation rib 302 to realize the connection between the heat insulation sleeve 42 and the support pad 30.

[0045] To avoid interference with the connecting rod assembly, the height of the heat insulation sleeve 42 is no higher than the surface height of the support pad 30 used to support the connecting rod assembly. The height of the heat insulation sleeve 42 being lower than or equal to the support surface of the support pad 30 reduces interference with the movement trajectory of the connecting rod assembly and avoids movement difficulties caused by 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 no higher than the surface height of the support pad 30 used to support the linkage assembly. The lower height of the mounting shaft 40 reduces interference with the movement of the linkage assembly, further ensuring that the linkage assembly can move smoothly along the predetermined trajectory during operation.

[0047] To this end, the heat insulation sleeve 42 is provided with a stepped structure 422 in the radial direction, and the mounting shaft 40 is provided with a radially protruding stop rib 401 to limit excessive sliding of the heat insulation sleeve 42. The stop rib 401 abuts against the stepped structure 422 to keep the support pad 30 and the housing of the gearbox 10 separated. This prevents excessive axial sliding and ensures stable operation of the connecting rod assembly.

[0048] Furthermore, the housing of the gearbox 10 is provided with a limiting rib 101 extending axially along the mounting shaft 40. The limiting rib 101 is located between the support pad 30 and the housing of the gearbox 10 to limit the amount of sliding of the support pad 30 relative to the mounting shaft 40. This ensures that the support pad 30 does not slide excessively, causing the height of the mounting shaft 40 to exceed the surface height of the support pad 30 used to support the connecting rod assembly.

[0049] To reduce the impact of radial bending of the spring 41 on the damping and heat reduction effect, the limiting rib 101 is arranged along the circumference of the spring 41 to limit the radial movement of the spring 41, which can ensure that it is always in the correct working position and guarantee the damping and heat reduction effect.

[0050] To enhance the stability of the support pad 30, at least two mounting shafts 40 are provided, spaced apart. The support pad 30 is slidably mounted on at least two mounting shafts 40, and each mounting shaft 40 is equipped with a spring 41. Preferably, four mounting shafts 40 are provided. Multiple mounting shafts 40 can provide better support, making the support pad 30 more stable, reducing swaying or displacement that may be caused by a single shaft, and the spring 41 on each mounting shaft 40 can better absorb vibration and impact forces. The four mounting shafts 40 are located at the four corners of the support pad 30, which can better provide stable support for the support pad 30, while placing the mounting shafts 40 at the edge of the support pad 30 to reduce interference with the linkage assembly.

[0051] Since the heat insulation sleeve 42 and 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 gearbox 10, which facilitates disassembly and replacement and makes it easier for later maintenance.

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

[0053] Understandably, in other embodiments, the blade assembly may also include a moving blade and a fixed blade, with the fixed blade fixed to the pruning shears. Only an eccentric wheel and a connecting rod are needed to drive the moving blade to move relative to the fixed blade to achieve shearing.

[0054] Understandably, in other embodiments, the support pad is slidably mounted on the heat insulation sleeve, which is fixedly connected to the mounting shaft.

[0055] Understandably, in other embodiments, the mounting shaft is plugged into or pinned to the gearbox housing for easy disassembly and replacement.

[0056] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A pruning shear with shock absorption and cooling function, comprising a gearbox (10) and a gear assembly, a connecting rod assembly, and a support pad (30) disposed within the gearbox (10), wherein the connecting rod assembly and the gear assembly are connected, and the support pad (30) is disposed between the connecting rod assembly and the housing of the gearbox (10) and is used to support the connecting rod assembly, characterized in that, The gearbox (10) housing 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 abutted against the support pad (30) and the gearbox (10) housing. Under the elastic force of the spring (41), the support pad (30) tends to remain detached from the gearbox (10) housing.

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

3. The pruning shears with shock absorption and cooling 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 cooling function according to claim 3, characterized in that, The heat insulation sleeve (42) has a stepped structure (422) in the radial direction, and the mounting shaft (40) has a radially protruding stop rib (401) for limiting excessive sliding of the heat insulation sleeve (42). The stop rib (401) abuts against the stepped structure (422) to keep the support pad (30) and the housing of the gearbox (10) separated.

5. The pruning shears with shock absorption and cooling 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 cooling function according to claim 1, characterized in that, The support pad (30) is provided with a through hole (301) that slides 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 cooling function according to claim 6, characterized in that, The housing of the gearbox (10) is provided with a limiting rib (101) extending axially along the mounting shaft (40). The limiting rib (101) is located between the support pad (30) and the housing of the gearbox (10) to limit the amount of sliding of the support pad (30) relative to the mounting shaft (40).

8. The pruning shears with shock absorption and cooling function according to claim 7, characterized in that, The limiting rib (101) is arranged along the circumferential direction of the spring (41) to restrict the radial movement of the spring (41).

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

10. The pruning shears with shock absorption and cooling function according to claim 1, characterized in that, The mounting shaft (40) is threaded, plugged, or pin-connected to the housing of the gearbox (10).

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