Impact-resistant split crankshaft for chain saw

Abstract

The utility model relates to the technical field of crankshafts, and discloses an impact-resistant split crankshaft for a chain saw, which comprises a main journal, a connecting rod journal is arranged at the bottom end of the main journal, cranks are arranged at two ends of the connecting rod journal, a front end shaft is arranged at one end, far away from the connecting rod journal, of each crank, and a buffer component is arranged between each connecting rod journal and the corresponding crank. Impact-resistant components are arranged on the main journal and the front end shaft; and by arranging the buffering assembly and the impact-resistant assembly, the impact-resistant capacity of the crankshaft is effectively improved. The buffering assembly can absorb and disperse impact energy in time, the multi-layer structure of the impact-resistant assembly provides different degrees of protection from outside to inside, the crankshaft is not prone to abrasion, deformation, breakage and the like under frequent impact, the service life of the crankshaft is prolonged, vibration generated when the crankshaft works is reduced due to the arrangement of the shock absorber and the reinforcing ribs, and the service life of the crankshaft is prolonged. The strength of the crank is enhanced, and the overall stability of the chain saw is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a crankshaft technical field, concretely is a kind of impact-resistant split crankshaft for chain saw. BACKGROUND

[0002] As a common forestry and garden tool, the performance of the core component crankshaft of chain saw is crucial. The impact-resistant split crankshaft for chain saw is designed as a split structure, which can better cope with the impact generated during work while ensuring power transmission. This design allows each part of the crankshaft to be made of different materials and processes according to the actual stress condition, thereby improving the overall impact resistance and meeting the usage requirements of chain saw under complex working conditions.

[0003] Application No. 202323559192.3 discloses a light crankshaft. The light crankshaft is equipped with a main body mechanism, which allows the operator to quickly disassemble and assemble the crankshaft connecting rod during use. This facilitates maintenance and replacement of the crankshaft connecting rod without the need for additional tools, reducing the disassembly time of the light crankshaft and improving the maintenance efficiency and flexibility of the light crankshaft.

[0004] The above device has insufficient impact resistance, and frequent impacts during use can cause wear, deformation, or even breakage of the crankshaft. Therefore, an impact-resistant split crankshaft for chain saw is proposed. UTILITY MODEL CONTENTS

[0005] To overcome the shortcomings of the prior art, the utility model provides an impact-resistant split crankshaft for chain saw, which solves the problem of insufficient impact resistance of the crankshaft device during use, and frequent impacts during use can cause wear, deformation, or even breakage of the crankshaft.

[0006] To achieve the above-mentioned purposes, the utility model provides the following technical scheme: an impact-resistant split crankshaft for chain saw, comprising a main journal, a connecting rod journal is provided at the bottom end of the main journal, a crank is provided at both ends of the connecting rod journal, a front end shaft is provided at one end of the crank away from the connecting rod journal, a buffer assembly is provided between the connecting rod journal and the crank, and an impact-resistant assembly is provided on the main journal and the front end shaft.

[0007] Preferably, the buffer assembly comprises a spring, a rubber pad, and a collar, the collar is rotatably sleeved at both ends of the connecting rod journal, the rubber pad is fixedly connected between the collar and the inner wall of the crank, and the spring is fixedly connected between the inner wall of the crank and the outer wall of the collar.

[0008] Preferably, the impact-resistant assembly comprises an outer layer, an intermediate layer and an inner layer, the outer layer is arranged at the outermost part of the main shaft neck and the front end shaft, the intermediate layer is arranged at the side wall of the outer layer, and the inner layer is arranged at the side wall of the intermediate layer away from the outer layer.

[0009] Preferably, the outer layer material is an alloy coating, the intermediate layer material is a copper alloy, and the inner layer material is a high-strength alloy steel.

[0010] Preferably, the front end shaft outer wall is fixedly provided with a shock absorber, and the crank side wall is fixedly provided with a reinforcing rib.

[0011] Preferably, the connecting rod shaft neck is provided with an oil inlet, and the connecting rod shaft neck, the crank and the front end shaft are provided with an internal through hole, and the internal through hole is communicated with the oil inlet.

[0012] Preferably, the internal through hole is provided with an oil outlet on both sides.

[0013] Compared with the prior art, the oil saw impact-resistant split crankshaft has the following beneficial effects:

[0014] 1. The oil saw impact-resistant split crankshaft, by setting the buffer assembly and the impact-resistant assembly, effectively improves the impact resistance of the crankshaft. The buffer assembly can timely absorb and disperse the impact energy, and the multi-layer structure of the impact-resistant assembly provides different degrees of protection from the outside to the inside, so that the crankshaft is not easy to appear problems such as wear, deformation and fracture under frequent impact, and the service life of the crankshaft is prolonged.

[0015] 2. The oil saw impact-resistant split crankshaft, the setting of the shock absorber and the reinforcing rib reduces the vibration of the crankshaft during work, enhances the strength of the crank, and improves the overall stability of the oil saw. This makes the oil saw more stable during use, and the operation is more comfortable, which also helps to improve the cutting accuracy and efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the side view structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the half-section structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the internal structure of the main shaft neck and the front end shaft of the utility model.

[0020] In the figure: 1, main journal; 2, connecting rod journal; 3, crank; 4, front end shaft; 5, reinforcing rib; 6, rubber pad; 7, spring; 8, oil inlet; 9, internal through hole; 10, oil outlet; 11, outer layer; 12, middle layer; 13, inner layer; 14, shock absorber; 61, collar. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] Please refer to Figures 1-4 An impact-resistant split crank for a chainsaw comprises a main journal 1, the bottom end of the main journal 1 is provided with a connecting rod journal 2, the connecting rod journal 2 is provided with a crank 3 at both ends, the end of the crank 3 away from the connecting rod journal 2 is provided with a front end shaft 4, a buffer assembly is arranged between the connecting rod journal 2 and the crank 3, and impact-resistant assemblies are arranged on the main journal 1 and the front end shaft 4. When the chainsaw engine is working, the reciprocating motion of the piston is transmitted to the connecting rod journal 2 through the connecting rod, so that the crank starts to rotate. The main journal 1 serves as a support component to ensure the stable rotation of the crank, and the power is output from the front end shaft 4 to drive the saw chain and other components of the chainsaw to work.

[0023] The buffer assembly comprises a spring 7, a rubber pad 6 and a collar 61, the collar 61 is rotatably sleeved at both ends of the connecting rod journal 2, the rubber pad 6 is fixedly connected between the collar 61 and the inner wall of the crank 3, and the spring 7 is fixedly connected between the inner wall of the crank 3 and the outer wall of the collar 61. When the crank is impacted, the collars 61 sleeved at both ends of the connecting rod journal 2 can rotate relatively, and the buffer assembly composed of the rubber pad 6 and the spring 7 plays a role. The rubber pad 6 is elastic and can preliminarily buffer the impact, and the spring 7 further absorbs and disperses the impact force to reduce the influence of the impact on the connecting part of the crank 3 and the connecting rod journal 2.

[0024] The impact-resistant assembly includes an outer layer 11, an intermediate layer 12, and an inner layer 13. The outer layer 11 is arranged at the outermost part of the main shaft neck 1 and the front end shaft 4. The intermediate layer 12 is arranged on the side wall of the outer layer 11. The inner layer 13 is arranged on the side wall of the intermediate layer 12 away from the outer layer 11. The outer layer 11 is made of an alloy coating. The intermediate layer 12 is made of copper alloy. The inner layer 13 is made of high-strength alloy steel. The impact-resistant assembly on the main shaft neck 1 and the front end shaft 4 plays a protective role. The alloy coating of the outer layer 11 has high hardness and good wear resistance, and can resist external friction and slight impact. The copper alloy of the intermediate layer 12 has good toughness and heat conductivity, which can further buffer the impact and dissipate heat. The high-strength alloy steel of the inner layer 13 provides strong support and carrying capacity, ensuring that the main shaft neck 1 and the front end shaft 4 will not easily deform or break under impact.

[0025] The front end shaft 4 is fixedly installed with a shock absorber 14 on the outer wall, and the crank 3 is fixedly installed with a reinforcing rib 5 on the side wall. The shock absorber 14 on the outer wall of the front end shaft 4 can reduce the vibration generated during the rotation of the crankshaft, improving the stability and operation comfort of the chainsaw. The reinforcing rib 5 on the side wall of the crank 3 enhances the strength of the crank 3, enabling it to better withstand impact and torque.

[0026] The connecting rod journal 2 is provided with an oil inlet 8. The connecting rod journal 2, the crank 3, and the front end shaft 4 are provided with internal through holes 9. The internal through holes 9 are in communication with the oil inlet 8. Oil outlets 10 are arranged on both sides of the internal through holes 9. Lubricating oil enters the connecting rod journal 2 from the oil inlet 8, flows through the internal through holes 9 to various parts of the crankshaft, and finally flows out from the oil outlets 10. Lubricating oil not only reduces friction between parts, but also carries away part of the heat and impurities, ensuring that the crankshaft works in good lubrication and heat dissipation conditions.

[0027] Structure description: Main shaft neck 1: As the core support part of the impact-resistant split crankshaft for chainsaws, it is installed in the main bearing seat of the engine. Its main function is to provide stable support for the entire crankshaft, ensuring that the crankshaft can rotate smoothly. During engine operation, the main shaft neck bears the combined force of gas pressure transmitted by the piston through the connecting rod, inertial force, etc., and is a key component to ensure normal operation of the crankshaft.

[0028] Connecting rod journal 2: Also known as crankpin, it is connected to the large end of the connecting rod. Its function is to convert the reciprocating linear motion of the piston into the circular rotary motion of the crankshaft. In the working cycle of the engine, the piston moves up and down in the cylinder, and the force is transmitted to the connecting rod journal through the connecting rod, thereby driving the crankshaft to rotate, and then driving other components of the chainsaw to work.

[0029] Crank 3: Connects the main journal 1 and the connecting rod journal 2, plays a role in force transmission and conversion. It transmits the force exerted by the piston on the connecting rod journal through the connecting rod to the main journal, enabling the crankshaft to continuously perform circumferential motion. The shape and size of the crank design have a significant impact on the balance performance and power transmission efficiency of the crankshaft.

[0030] Front end shaft 4: Located at the front end of the crankshaft, usually used to install some driving accessories such as starting device, chain wheel, etc. It outputs the power of the crankshaft to other parts of the chainsaw, and is the key link of engine power transmission to external working parts. The front end shaft needs to have certain strength and rigidity to ensure reliable power transmission.

[0031] Reinforcing rib 5: Fixedly installed on the side wall of the crank 3, its main function is to enhance the strength and rigidity of the crank 3. During the operation of the crankshaft, the crank will bear a large torque and impact force, and the reinforcing rib can effectively disperse these forces, reduce the risk of deformation or fracture of the crank, and improve the overall reliability of the crankshaft.

[0032] Rubber pad 6: Fixedly connected between the collar 61 and the inner wall of the crank 3. The rubber pad has good elasticity and buffering performance, and can absorb part of the impact energy when the crankshaft is impacted, reducing the impact on the connecting part of the crank 3 and the connecting rod journal 2, playing a buffering and protection role.

[0033] Spring 7: Fixedly connected between the inner wall of the crank 3 and the outer wall of the collar 61. Cooperating with the rubber pad 6, the spring further enhances the buffering effect. When impacted, the spring will elastically deform, absorb and store impact energy, and then release energy after the impact disappears, enabling the crankshaft to run more smoothly.

[0034] Collar 61: Rotatably sleeved on both ends of the connecting rod journal 2, it provides a basis for the installation and support of the rubber pad 6 and the spring 7. The collar can rotate relative to the connecting rod journal, enabling the buffering assembly to better play its role and effectively cope with impacts of different directions and sizes.

[0035] Oil inlet 8: Provided on the connecting rod journal 2, it is the inlet for lubricating oil to enter the crankshaft. After entering the crankshaft from the oil inlet, the lubricating oil is transported to various parts of the crankshaft that need lubrication through the internal through hole 9, ensuring good lubrication between the parts of the crankshaft and reducing friction and wear.

[0036] Internal through hole 9: Penetrates the connecting rod journal 2, the crank 3 and the front end shaft 4, and is connected with the oil inlet 8. Its function is to provide a flow channel for lubricating oil, enabling it to reach all key parts of the crankshaft for comprehensive lubrication.

[0037] Oil outlet 10: Opened on both sides of the internal through hole 9, the lubricating oil flows out through the oil outlet after completing the lubrication of each part of the crankshaft, forming a complete lubrication cycle system. The setting of the oil outlet helps to maintain the flowability of the lubricating oil, carry away the heat and impurities generated by friction, and ensure the lubrication effect.

[0038] Outer layer 11: Set at the outermost part of the main journal 1 and the front end shaft 4, the material is alloy coating. Alloy coating has the characteristics of high hardness, wear resistance, corrosion resistance, etc., which can effectively resist external friction, wear and corrosion, protect the internal structure of the main journal and the front end shaft from damage, and improve its impact resistance.

[0039] Intermediate layer 12: Located on the side wall of the outer layer 11, the material is copper alloy. Copper alloy has good toughness and thermal conductivity, which can further buffer impact energy and quickly dissipate heat generated by friction, reducing the impact of temperature rise on the performance of the crankshaft.

[0040] Inner layer 13: Set on the side wall of the intermediate layer 12 away from the outer layer 11, the material is high-strength alloy steel. High-strength alloy steel has excellent strength and toughness, which can provide strong support and carrying capacity for the main journal and the front end shaft, ensuring that it will not deform or break when subjected to a larger impact.

[0041] Shock absorber 14: Fixedly installed on the outer wall of the front end shaft 4, its function is to reduce the vibration generated by the crankshaft during rotation. The shock absorber can absorb and consume vibration energy, making the chainsaw work more smoothly, reducing noise, and improving the comfort and stability of operation

[0042] When the chainsaw engine is working, the reciprocating motion of the piston is transmitted to the connecting rod journal 2 through the connecting rod, causing the crankshaft to start rotating. The main journal 1 acts as a support component, ensuring the smooth rotation of the crankshaft, and the power is output from the front shaft 4 to drive the saw chain and other components of the chainsaw. When the crankshaft is impacted, the collar 61 fitted at both ends of the connecting rod journal 2 can rotate relative to each other, and the buffer assembly composed of the rubber pad 6 and the spring 7 plays a role. The rubber pad 6 has elasticity and can preliminarily buffer the impact, and the spring 7 further absorbs and disperses the impact force, reducing the impact on the connecting part of the crank 3 and the connecting rod journal 2, and the impact-resistant components on the main journal 1 and the front shaft 4 play a protective role. The alloy coating of the outer layer 11 has high hardness and good wear resistance, and can resist external friction and slight impact; the copper alloy of the middle layer 12 has good toughness and thermal conductivity, which can further buffer the impact and dissipate heat; the high-strength alloy steel of the inner layer 13 provides strong support and carrying capacity, ensuring that the main journal 1 and the front shaft 4 will not easily deform or break under impact, and the shock absorber 14 on the outer wall of the front shaft 4 can reduce the vibration generated during the rotation of the crankshaft, improving the stability and operation comfort of the chainsaw. The reinforcing ribs 5 on the side wall of the crank 3 enhance the strength of the crank 3, making it better able to withstand impact and torque, and the lubricating oil enters the connecting rod journal 2 from the oil inlet 8, flows to various parts of the crankshaft through the internal through hole 9, and finally flows out from the oil outlet 10. The lubricating oil not only reduces the friction between the components, but also carries away part of the heat and impurities, ensuring that the crankshaft works in good lubrication and heat dissipation conditions.

[0043] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An impact-resistant split crank for a chainsaw, comprising a main journal (1), a bottom end of the main journal (1) being provided with a connecting rod journal (2), both ends of the connecting rod journal (2) being provided with a crank (3), a distal end of the crank (3) away from the connecting rod journal (2) being provided with a front end shaft (4), characterized in that, Also include: The connecting rod journal (2) and crank (3) are provided with a buffer assembly, the main journal (1) and front end shaft (4) are provided with impact resistance assembly.

2. An impact-resistant split crankshaft for a chainsaw as defined in claim 1, characterized in that: The buffer assembly includes spring (7), rubber pad (6), collar (61), the collar (61) is rotatably provided on both ends of the connecting rod journal (2), the rubber pad (6) is fixedly connected between the collar (61) and the inner wall of the crank (3), the spring (7) is fixedly connected between the inner wall of the crank (3) and the outer wall of the collar (61).

3. The impact-resistant split crankshaft for a chainsaw according to claim 1, characterized in that: The impact resistance assembly includes outer layer (11), intermediate layer (12), inner layer (13), the outer layer (11) is provided on the outermost of the main journal (1) and the front end shaft (4), the intermediate layer (12) is provided on the side wall of the outer layer (11), the inner layer (13) is provided on the side wall of the intermediate layer (12) away from the outer layer (11).

4. An impact-resistant split crankshaft for a chainsaw as defined in claim 3, characterized in that: The outer layer (11) is made of alloy coating, the intermediate layer (12) is made of copper alloy, and the inner layer (13) is made of high-strength alloy steel.

5. The impact-resistant split crankshaft for a chainsaw according to claim 1, characterized in that: The front end shaft (4) is fixedly installed with a shock absorber (14), and the crank (3) is fixedly installed with a reinforcing rib (5).

6. The impact-resistant split crankshaft for a chainsaw according to claim 1, characterized in that: The connecting rod journal (2) is provided with an oil inlet (8), and the connecting rod journal (2), the crank (3) and the front end shaft (4) are provided with an internal through hole (9), the internal through hole (9) is communicated with the oil inlet (8).

7. An impact-resistant split crankshaft for a chainsaw as defined in claim 6, characterized in that: The internal through hole (9) is provided with an oil outlet (10) on both sides.

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