Electric tool convenient for heat dissipation

Abstract

The utility model discloses an electric tool convenient for heat dissipation, which comprises a shell, a driving mechanism, a rotary striking mechanism and an isolation sleeve, and an installation space is formed in the shell; the driving mechanism is fixed in the mounting space; the rotary striking mechanism is arranged in the mounting space and is connected to the driving mechanism; the isolation sleeve is arranged at one end of the rotary striking mechanism in a sleeving mode, a plurality of first flow guide ribs are arranged on the inner wall of the isolation sleeve in a protruding and extending mode, and the first flow guide ribs extend in the axial direction of the isolation sleeve. According to the electric tool, the multiple first flow guide ribs are arranged on the isolation sleeve, lubricating oil can move in the moving direction of the impact rod along the first flow guide ribs when the tool works, it is guaranteed that the lubricating oil flows in the tool, and the lubricating and heat dissipation effects are improved.

Description

Technical Field

[0001] The utility model belongs to a rotary striking tool, in particular to an electric tool which is convenient for heat dissipation. Background Art

[0002] Electric hammers and pickaxes are common power tools used for drilling, grooving, and chiseling concrete. With technological advancements, the drilling efficiency and comfort of electric hammers are increasing. These tools have internal mechanisms capable of both rotational and reciprocating linear motion. Lubricants reduce resistance and cool the tools, but even so, prolonged friction can quickly shorten the lifespan of internal components. Utility Model Content

[0003] The purpose of the utility model is to provide an electric tool for improving the lubrication and heat dissipation effects of lubricating oil in the tool.

[0004] In order to achieve the above-mentioned purpose, a specific embodiment of the present utility model provides an electric tool that is easy to dissipate heat, including a shell, a drive mechanism, a rotary striking mechanism and an isolation sleeve, wherein an installation space is formed inside the shell; the drive mechanism is fixed in the installation space, including a motor, a crankshaft connected to the motor output shaft and the piston, and a crankcase, the motor drives the piston to reciprocate in the cylinder through the crankshaft, and the crankcase cover is arranged outside the crankshaft; the rotary striking mechanism is arranged in the installation space, including a cylinder and a piston; the isolation sleeve is arranged on one end of the rotary striking mechanism, and a first guide rib protrudes from the inner wall of the isolation sleeve, and the first guide rib extends along the axial direction of the isolation sleeve.

[0005] In one or more embodiments of the present invention, a plurality of first guide ribs are provided, and the first guide ribs are evenly distributed on the inner wall of the isolation sleeve.

[0006] In one or more embodiments of the present invention, a second guide rib protrudes from the inner wall of the crankcase near one end of the cylinder, and the extension direction of the second guide rib is consistent with the axial direction of the cylinder.

[0007] In one or more embodiments of the present invention, a plurality of second guide ribs are provided, and the second guide ribs are evenly distributed on the crankcase.

[0008] In one or more embodiments of the present invention, the driving mechanism includes a bevel gear fixed to the cylinder, and a fixing sleeve fixedly connected to the outer shell, the bevel gear sleeve is arranged in the fixing sleeve, and a spiral first guide groove is recessed on the inner wall of the fixing sleeve.

[0009] In one or more embodiments of the present invention, the fixing sleeve is provided with second guide grooves on end surfaces at both axial ends thereof, the second guide grooves being connected to the first guide grooves.

[0010] In one or more embodiments of the present invention, a plurality of third guide grooves are recessed on the outer wall of the cylinder, and the third guide grooves extend along the axial direction of the cylinder.

[0011] In one or more embodiments of the present invention, a first mesh structure for storing lubricant is recessed on the inner wall of the cylinder, and the first mesh structure includes two groups of first spiral guide grooves with opposite rotation directions.

[0012] In one or more embodiments of the present invention, a second mesh structure for storing lubricant is recessed on the outer wall of the piston in contact with the cylinder, and the second mesh structure includes two groups of spiral guide grooves with opposite rotation directions.

[0013] In one or more embodiments of the present invention, the rotary striking mechanism also includes a hammer and an impact rod arranged in the cylinder, the hammer is arranged between the impact rod and the piston, and a third mesh structure for storing lubricant is recessed on the outer wall of the hammer in contact with the cylinder, and the third mesh structure includes two groups of spiral guide grooves with opposite rotation directions.

[0014] Compared with the prior art, the electric tool of the present invention is provided with a plurality of first guide ribs on the isolation sleeve, which can enable the lubricating oil to move along the first guide ribs in the moving direction of the impact rod when the tool is working, thereby ensuring the flow of the lubricating oil inside the tool and improving the lubrication and heat dissipation effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of an electric tool in one embodiment of the present utility model;

[0017] Figure 2 A partial cross-sectional view of an electric tool in one embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of an isolation sleeve in one embodiment of the present utility model;

[0019] Figure 4 This is a schematic diagram of a fixing sleeve in one embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of a cylinder in one embodiment of the present utility model;

[0021] Figure 6 Schematic diagram of a crankcase in one embodiment of the present invention.

[0022] Description of main reference numerals:

[0023] 100-power tool, 10-housing, 21-crankcase, 211-second guide rib, 22-cone gear, 23-motor, 24-crankshaft, 25-fixed sleeve, 251-first guide groove, 252-second guide groove, 31-cylinder, 311-third guide groove, 32-piston, 33-hammer, 34-impact rod, 40-isolation sleeve, 41-first guide rib. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0025] like Figure 1-6 As shown, the power tool 100 in one embodiment of the present invention includes a housing 10, a drive mechanism, a rotary striking mechanism, and an isolation sleeve 40. An installation space is formed inside the housing 10, and the drive mechanism and the rotary striking mechanism are arranged in this installation space. The rotary striking mechanism includes a cylinder 31 and a piston 32. The drive mechanism includes a motor 23, a crankshaft 24, and a crankcase 21. The crankshaft 24 is connected to the piston 32 and the motor 23. The motor 23 drives the piston 32 to reciprocate in the cylinder 31 through the crankshaft 24. The crankcase 21 is covered with a cover outside the crankshaft 24. The isolation sleeve 40 is sleeved on one end of the rotary striking mechanism. The isolation sleeve 40 can be, for example, a hollow cylindrical structure with openings on both sides. By sleeved on the front end of the rotary striking mechanism, the front end of the rotary striking mechanism can be prevented from contacting the inner wall of the housing 10 during rotation, thereby reducing friction and preventing the rotary striking mechanism from rotating directly on the inner wall of the housing 10, causing the housing 10 to overheat.

[0026] Since the rotary striking mechanism will perform high-speed rotation and / or striking operations in the installation space, it is necessary to add lubricant to the rotary striking mechanism to reduce friction and assist in cooling. During the operation of the rotary striking mechanism, the space inside the cylinder 31 is repeatedly squeezed and stretched. At the same time, the side walls of the cylinder 31 are opened, and the airflow generated flows into the installation space through the side wall openings. In order to ensure the flow of lubricant and thus fully lubricate the area around the rotary striking mechanism, in the above embodiment, as shown in FIG. Figure 3 As shown, a first guide rib 41 protrudes from the inner wall of the isolation sleeve 40 and extends axially along the isolation sleeve 40. Therefore, during operation, the circumferential movement of the lubricant on the inner wall of the isolation sleeve 40 is blocked by the first guide rib 41. The lubricant can only flow along the first guide rib 41 toward the rotating striking mechanism under the action of the airflow, thereby ensuring sufficient lubrication of the lubricant and preventing accumulation.

[0027] Preferably, a plurality of first guide ribs 41 protrude from the inner wall of the isolation sleeve 40 , and the plurality of first guide ribs 41 are evenly distributed on the inner wall of the isolation sleeve 40 to further ensure the flow of the lubricant and the lubrication and cooling effect.

[0028] like Figure 2 As shown, the rotary striking mechanism also includes a hammer 33 and an impact rod 34. The impact rod 34, hammer 33, and piston 32 are sequentially disposed within the cylinder 31. The impact rod 34 is disposed at the front end of the housing 10 and is adapted to connect to a drill bit, pickaxe, or the like. The piston 32 is disposed at the rear end of the cylinder 31. When the piston 32 moves forward, the air between it and the hammer 33 is compressed, pushing the hammer 33 forward, whereupon it contacts and strikes the impact rod 34, causing it to move forward synchronously, thereby striking or chiseling the target. When the piston 32 moves backward, the space between it and the hammer 33 increases, causing the hammer 33 to disengage from the impact rod 34 and wait for the next striking operation.

[0029] Similar to the isolation sleeve 40, a second guide rib 211 is provided on the inner wall of the crankcase 21. The extension direction of the second guide rib 211 is the same as the axial direction of the cylinder 31. It is used to prevent the lubricant from flowing in other directions in the crankcase 21 and can only flow in the axial direction of the cylinder 31, thereby ensuring the flow direction of the lubricant and the lubrication and heat dissipation effect.

[0030] Preferably, a plurality of second guide ribs 211 are provided on the inner wall of the crankcase 21 , and the plurality of second guide ribs 211 are evenly distributed on the inner wall of the crankcase 21 along the axial direction of the cylinder 31 to avoid lubricant accumulation.

[0031] A bevel gear 22 is fixed on the outer wall of the cylinder 31. A fixing sleeve 25 is provided on the outer sleeve of the bevel gear 22, and the fixing sleeve 25 is fixed on the housing 10. The motor 23 drives the bevel gear 22 to rotate, thereby driving the piston 31 to rotate around its own axis.

[0032] During operation, the bevel gear 22 and the fixed sleeve 25 are in a state of frequent friction (except for a few cases where they do not rotate). In order to ensure that the lubricant can remain between the bevel gear 22 and the fixed sleeve 25, a first guide groove 251 is recessed on the inner wall of the fixed sleeve 25. The first guide groove 251 can store lubricant to ensure the amount of lubricant between the bevel gear 22 and the fixed sleeve 25, thereby ensuring lubrication and heat dissipation effects.

[0033] Preferably, the first guide groove 251 is spirally arranged on the inner wall of the fixing sleeve 25 , so that its length is extended, thereby increasing the amount of lubricant between the fixing sleeve 25 and the bevel gear 22 , further ensuring lubrication and heat dissipation effects.

[0034] Furthermore, second guide grooves 252 connected to the first guide grooves 251 are recessed on the end surfaces at both axial ends of the fixing sleeve 25 for guiding lubricant outside the fixing sleeve 25 into the first guide grooves 251 to ensure the lubricant reserve in the first guide grooves 251 .

[0035] In one embodiment, a plurality of third guide grooves 311 are recessed on the outer wall of the cylinder 31 and extend along the axial direction of the cylinder 31 to store and ensure the flow direction of the lubricant, guiding the lubricant to flow toward the rear bevel gear 22 under the action of the airflow.

[0036] Preferably, a first mesh structure (not shown) for storing lubricant is recessed on the inner wall of the cylinder 31. The first mesh structure is composed of two groups of spiral guide grooves with opposite rotation directions, and each group of guide grooves includes one or more guide grooves, thereby ensuring the amount of lubricant on the inner wall of the cylinder 31, thereby achieving lubrication and heat dissipation effects.

[0037] Furthermore, a second mesh structure (not shown) for storing lubricant is provided on the outer wall where the piston 32 contacts the cylinder 31. The second mesh structure is also composed of two groups of spiral guide grooves with opposite rotation directions. Each group of guide grooves can be one or more guide grooves, which are used to ensure the amount of lubricant on the outer wall of the piston 32, thereby achieving lubrication and heat dissipation effects.

[0038] Furthermore, a third mesh structure (not shown) for storing lubricant is provided on the outer wall where the hammer 33 contacts the cylinder 31. The third mesh structure is also composed of two groups of spiral guide grooves with opposite rotation directions. Each group of guide grooves can be one or more guide grooves, which are used to ensure the amount of lubricant on the outer wall of the hammer 33, thereby achieving lubrication and heat dissipation effects.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0040] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An electric tool for facilitating heat dissipation, characterized in that: include: a housing (10) having an installation space formed therein; A rotary striking mechanism is arranged in the installation space and comprises a cylinder (31) and a piston (32); A driving mechanism is fixed in the installation space and includes a motor (23), a crankshaft (24) connected to an output shaft of the motor (23) and a piston (32), and a crankcase (21). The motor (23) drives the piston (32) to reciprocate in the cylinder (31) via the crankshaft (24). The crankcase (21) is covered outside the crankshaft (24); and An isolation sleeve (40) is sleeved on one end of the rotary striking mechanism. A first guide rib (41) protrudes from the inner wall of the isolation sleeve (40), and the first guide rib (41) extends along the axial direction of the isolation sleeve (40).

2. The electric tool according to claim 1, wherein: A plurality of the first guide ribs (41) are provided, and the first guide ribs (41) are evenly distributed on the inner wall of the isolation sleeve (40).

3. The electric tool according to claim 1, wherein: A second guide rib (211) protrudes from the inner wall of the crankcase (21) at one end close to the cylinder (31), and the extension direction of the second guide rib (211) is consistent with the axial direction of the cylinder (31).

4. The electric tool according to claim 3, wherein: A plurality of the second guide ribs (211) are provided, and the second guide ribs (211) are evenly distributed on the crankcase (21).

5. The electric tool according to claim 1, wherein: The driving mechanism further comprises a bevel gear (22) fixed to the cylinder, and a fixing sleeve (25) fixedly connected to the housing (10); the bevel gear (22) is sleeved in the fixing sleeve (25), and a first spiral guide groove (251) is recessed on the inner wall of the fixing sleeve (25).

6. The electric tool according to claim 5, wherein: The fixing sleeve (25) is provided with a second guide groove (252) on the end surfaces at both axial ends thereof, the second guide groove (252) being indented and communicating with the first guide groove (251).

7. The electric tool according to claim 1, wherein: A plurality of third guide grooves (311) are recessed on the outer wall of the cylinder (31), and the third guide grooves (311) extend along the axial direction of the cylinder (31).

8. The electric tool according to claim 1, wherein: A first mesh structure for storing lubricant is recessed on the inner wall of the cylinder (31), and the first mesh structure comprises two groups of first spiral guide grooves with opposite rotation directions.

9. The electric tool according to claim 7, wherein: A second mesh structure for storing lubricant is recessed on the outer wall of the piston (32) in contact with the cylinder (31), and the second mesh structure includes two groups of spiral guide grooves with opposite rotation directions.

10. The electric tool according to claim 1, wherein: The rotary striking mechanism further comprises a hammer (33) and an impact rod (34) arranged in the cylinder (31); the hammer (33) is arranged between the impact rod (34) and the piston (32); a third mesh structure for storing lubricant is recessed on the outer wall of the hammer (33) in contact with the cylinder (31); the third mesh structure comprises two groups of spiral guide grooves with opposite rotation directions.

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