Engine cylinder body with vibration reduction and mute structure

Abstract

The utility model discloses an engine cylinder block with a vibration damping and silencing structure, which comprises a cylinder block body with a mounting seat, a plurality of circumferential radiating fins are arranged on the outer side wall of the cylinder block body, a plurality of groups of opposite mounting holes are arranged on the mounting seat and the radiating fins, mounting bolts are inserted into the mounting holes, and the mounting bolts are fixed on the mounting seat. An anti-vibration pad with a through hole is arranged at the bottom end of the cylinder block body, a mounting bolt penetrates through the through hole and is sleeved with an anti-vibration spring, and the anti-vibration spring is located between the anti-vibration pad and the cooling fins at the bottom. The anti-vibration pad is arranged at the bottom of the cylinder block body and fixed through the mounting bolts penetrating through the mounting base and the cooling fins, in addition, the mounting bolts between the anti-vibration pad and the cooling fins are sleeved with the anti-vibration springs for secondary vibration reduction, and the cylinder block has the advantages of being capable of being rapidly mounted and fixed and enhancing the vibration reduction effect; and the rubber gaskets are arranged in the mounting holes for radial vibration reduction, so that multi-directional vibration reduction is realized, and vibration transmission from an engine to a fuselage is weakened to the greatest extent.

Description

Technical Field

[0001] The utility model relates to a cylinder body for an electric tool, in particular to an engine cylinder body with a vibration reduction and noise reduction structure. Background Art

[0002] The engine is the source of driving force for power tools. It is divided into single-cylinder and multi-cylinder types according to the number of cylinders. During operation, the movement of the piston and crankshaft inside the engine will cause the entire engine to vibrate. The vibration of the engine will also be transmitted to the body, causing the body to shake, causing damage to the mounting structure, causing noise, and even resonance.

[0003] To address this problem, the prior art provides a vibration-damping pad at the bottom of the cylinder block and then fixes the cylinder block in the power tool housing. Although this structure can achieve a certain vibration-damping effect, its vibration-damping effect is limited. In addition, when the engine is fixed, the fixing structure generally presses the soft pad tightly, thereby weakening the vibration-damping effect of the soft pad. Utility Model Content

[0004] Based on the shortcomings that the prior art uses soft pads for vibration reduction, but the vibration reduction effect is weak, and when the engine is fixed, the fixing structure generally presses the soft pads, further weakening the vibration reduction effect of the soft pads, the utility model provides an engine cylinder block with a vibration reduction and silent structure.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] An engine cylinder block with a vibration-damping and noise-silencing structure comprises a cylinder body, a mounting seat is provided at the top end of the cylinder body, a plurality of circumferential heat dissipation fins are provided on the outer side wall of the cylinder body, a plurality of groups of relative mounting holes are provided on the mounting seat and the heat dissipation fins, mounting bolts are inserted into the mounting holes, a vibration-damping pad with a through hole is provided at the bottom end of the cylinder body, the mounting bolts pass through the through holes and a vibration-damping spring is sleeved on the mounting bolts, and the vibration-damping spring is located between the vibration-damping pad and the heat dissipation fins at the bottom.

[0007] Preferably, it further includes a supporting base plate for supporting the vibration damping pad, the supporting base plate is provided with through holes corresponding to the through holes one by one, and the mounting bolts pass through the through holes.

[0008] Preferably, a supporting boss is provided in the middle of the vibration-damping pad, and the supporting boss abuts against the bottom end of the cylinder body.

[0009] Preferably, the vibration damping pad and the supporting base plate are provided with functional holes for other engine components to pass through.

[0010] Preferably, the mounting bolts pass through the through holes of the supporting base plate and are then fastened to the housing of the electric tool via nuts.

[0011] Preferably, the diameter of the mounting hole is larger than the diameter of the mounting bolt, and a rubber gasket is provided at the gap between the hole wall of the mounting hole and the side wall of the mounting bolt.

[0012] Preferably, four groups of mounting holes are provided, and at least two of each group of mounting holes are provided with rubber washers.

[0013] Preferably, the rubber gasket is an I-shaped structure, with a through hole in the middle for the installation bolt to pass through.

[0014] Preferably, the diameter of the through hole is less than or equal to the diameter of the mounting bolt.

[0015] Preferably, an end cover is provided on the top of the cylinder body, and the mounting bolts pass through the end cover and extend into the mounting holes to press and fix the end cover.

[0016] Compared with the prior art, the advantages of the utility model are as follows: a vibration damping pad is arranged at the bottom of the cylinder body and fixed by means of mounting bolts passing through the mounting seat and the heat dissipation fins; in addition, a vibration damping spring is sleeved on the mounting bolts between the vibration damping pad and the heat dissipation fins for secondary vibration damping, which has the advantages of quick installation and fixation and enhanced vibration damping effect; in addition, a rubber gasket is arranged in the mounting hole for radial vibration damping, thereby realizing multi-directional vibration damping and reducing the vibration transmission from the engine to the fuselage to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described object and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 A side view of the present application;

[0019] Figure 2 A top view of the application;

[0020] Figure 3 for Figure 2 Middle AA section;

[0021] Figure 4 A perspective view of the present application;

[0022] Figure 5 An exploded view of this application;

[0023] Figure 6 is a stereogram of a rubber gasket;

[0024] In the figure: 10, cylinder body; 101, mounting seat; 102, cooling fin; 20, mounting bolt; 30, vibration damping pad; 301, supporting boss; 40, supporting base plate; 50, nut; 60, vibration damping spring; 70, rubber gasket. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary and should not be construed as limiting the protection scope of the present invention.

[0026] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0027] This embodiment mainly describes the engine cylinder block with a vibration reduction and noise reduction structure, as follows:

[0028] Main program :

[0029] In view of the above problems, this embodiment provides an engine cylinder block with a vibration reduction and noise reduction structure. Figure 1-Figure 6 , including a cylinder body 10, a mounting seat 101 is provided at the top of the cylinder body 10, a plurality of circumferential heat dissipation fins 102 are provided on the outer wall of the cylinder body 10, a plurality of groups of relative mounting holes are provided on the mounting seat 101 and the heat dissipation fins 102, mounting bolts 20 are inserted into the mounting holes, a vibration-damping pad 30 with a through hole is provided at the bottom end of the cylinder body 10, the mounting bolts 20 pass through the through holes and a vibration-damping spring 60 is sleeved on the mounting bolts 20, and the vibration-damping spring 60 is located between the vibration-damping pad 30 and the heat dissipation fins 102 at the bottom.

[0030] Support structure :

[0031] like Figure 1 , 4As shown in , 5, it also includes a support base plate 40 arranged below the vibration damping pad 30 for supporting the vibration damping pad 30. The support base plate 40 is provided with through holes corresponding to the through holes. The mounting bolts 20 pass through the through holes. The support base plate 40 is added to support the vibration damping pad 30 for easy installation and fixation. A support boss 301 is provided in the middle of the vibration damping pad 30. The support boss 301 abuts against the bottom end of the cylinder body 10. The support boss 301 supports the cylinder body 10 and also plays a role in buffering and vibration reduction. Specifically, the vibration damping pad 30 and the support base plate 40 are provided with functional holes for other engine components to pass through. Specifically, the mounting bolts 20 pass through the through holes of the support base plate 40 and are locked with the housing of the power tool through nuts 50. During installation, the support base plate 40 is abutted against the inner wall of the power tool housing, and a circular hole is opened on the inner wall of the power tool housing for the installation bolt 20 to pass through. The diameter of the circular hole is slightly larger than the diameter of the installation bolt 20 so that the installation screw has a certain amount of space to move and avoid hard contact in the fixed position. The space will be limited by the rubber gasket 70 to play a buffering role, and then the nut 50 is threadedly connected at the bottom end of the installation bolt 20 to fix it.

[0032] Radial vibration damping structure :

[0033] like Figure 3 , 4 As shown in Figure 5, the diameter of the mounting hole is larger than the diameter of the mounting bolt 20. A rubber gasket 70 is provided at the gap between the hole wall of the mounting hole and the side wall of the mounting bolt 20. The rubber gasket 70 is used to provide radial buffering and provide buffering and vibration reduction when the cylinder body 10 shakes. Specifically, there are four groups of mounting holes, and at least two of each group of mounting holes are provided with rubber gaskets 70. Since there are too many mounting holes, only two are required to play a buffering role. The four groups are distributed in a rectangular array, which is more stable when fixed. Specifically, the rubber gasket 70 is an I-shaped structure, and a through hole for the mounting bolt 20 to pass through is provided in the middle. Specifically, the diameter of the through hole is less than or equal to the diameter of the mounting bolt 20 to ensure that when the cylinder body 10 shakes, the rubber gasket 70 is quickly squeezed and acts as a buffer.

[0034] End cap fixing structure :

[0035] Preferably, an end cover is provided on the top of the cylinder body 10, and the mounting bolts 20 pass through the end cover and extend into the mounting hole to press and fix the end cover, and the mounting bolts 20 connect all the vibration reduction structures and the mounting structures in series, making the installation more convenient. The end cover is not shown in the drawings.

[0036] The above is a detailed introduction to the titles provided by the utility model. Specific examples are used in this article to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An engine cylinder block with a vibration reduction and noise reduction structure comprises a cylinder body, a mounting seat is provided at the top of the cylinder body, and a plurality of circumferential heat dissipation fins are provided on the outer side wall of the cylinder body, characterized in that: A plurality of groups of relative mounting holes are arranged on the mounting seat and the heat dissipation fins, mounting bolts are inserted into the mounting holes, a vibration-damping pad with a through hole is arranged at the bottom end of the cylinder body, the mounting bolts pass through the through hole and a vibration-damping spring is sleeved on the mounting bolts, and the vibration-damping spring is located between the vibration-damping pad and the heat dissipation fins at the bottom.

2. The engine cylinder block with a vibration reduction and noise reduction structure according to claim 1, characterized in that: It also includes a supporting base plate arranged below the vibration-damping pad for supporting the vibration-damping pad. The supporting base plate is provided with through holes corresponding to the through holes one by one, and the mounting bolts pass through the through holes.

3. The engine cylinder block with a vibration reduction and noise reduction structure according to claim 2, characterized in that: A supporting boss is arranged in the middle of the vibration-damping pad, and the supporting boss abuts against the bottom end of the cylinder body.

4. The engine cylinder block with a vibration reduction and noise reduction structure according to claim 3, characterized in that: Functional holes for other engine components to pass through are provided on the vibration damping pad and the supporting base plate.

5. The engine cylinder block with a vibration reduction and noise reduction structure according to claim 3, characterized in that: The mounting bolts are passed through the through holes of the supporting base plate and are then locked with the housing of the electric tool through nuts.

6. The engine cylinder block with a vibration reduction and noise reduction structure according to claim 1, characterized in that: The hole diameter of the mounting hole is larger than the diameter of the mounting bolt, and a rubber gasket is arranged at the gap between the hole wall of the mounting hole and the side wall of the mounting bolt.

7. The engine cylinder block with a vibration reduction and noise reduction structure according to claim 6, characterized in that: Four groups of mounting holes are provided, and at least two locations in each group of mounting holes are provided with rubber washers.

8. The engine cylinder block with a vibration reduction and noise reduction structure according to claim 6, characterized in that: The rubber gasket is an I-shaped structure, and a through hole for the installation bolt to pass through is provided in the middle thereof.

9. The engine cylinder block with a vibration reduction and noise reduction structure according to claim 8, characterized in that: The through hole diameter is less than or equal to the diameter of the mounting bolt.

10. The engine cylinder block with a vibration reduction and noise reduction structure according to claim 1, characterized in that: An end cover is arranged on the top of the cylinder body, and mounting bolts pass through the end cover and extend into the mounting holes to press and fix the end cover.

Images