Reciprocating tool

Abstract

This utility model relates to a reciprocating tool, including a housing, a drive mechanism and an actuator mounted on the housing, and a motion conversion mechanism connecting the drive mechanism and the actuator. The drive mechanism drives the motion conversion mechanism to rotate and drives the actuator to perform reciprocating motion. The reciprocating tool includes a lubrication mechanism located above the actuator. The lubrication mechanism and the housing form an oil storage cavity to lubricate the actuator. The lubrication mechanism has an oil cap fixed to the housing, an oil outlet hole penetrating the oil cap, and a guide rib protruding from the oil cap toward the actuator. The oil outlet hole communicates with the oil storage cavity, and the guide rib extends to the oil outlet hole. This utility model achieves lubrication by forming an oil storage cavity with the oil cap and the housing, and guiding the grease flowing from the oil outlet hole to the reciprocating rod via the guide rib. The structure is simple and the lubrication effect is good.

Description

[Technical Field]

[0001] This utility model relates to a reciprocating tool, and more particularly to a reciprocating tool used in decoration, construction and other applications. [Background Technology]

[0002] A reciprocating saw is a reciprocating tool used to cut materials such as wood and metal, and it is widely used in furniture and decoration industries. In actual operation, the motion conversion mechanism of the reciprocating saw converts the rotational motion of the drive mechanism into the reciprocating motion of the reciprocating rod, thereby driving the saw blade to perform high-frequency cutting operations. The reciprocating rod is usually guided by a pair of bearings fixed on the housing. The high-frequency motion of the reciprocating rod causes it to rub against the bearings continuously, which can easily lead to wear of both or localized high temperatures, thus affecting the service life of the parts.

[0003] An improvement to the above structure can be found in Chinese Utility Model Patent No. CN211029233U, published on July 17, 2020, which discloses an independent lubrication device for a reciprocating saw. Grease flows down from an oil hole at the bottom of the oil reservoir, and the flowing oil drips onto the surface of the reciprocating rod through a through-hole in the support block. The movement of the reciprocating rod replenishes the grease on the contact surface between the reciprocating rod and the support block, increasing lubrication between them. While this technical solution improves the lubrication device, it requires oil reservoirs on the upper surfaces of both support blocks, making installation inconvenient and cumbersome. Furthermore, the oil holes are prone to clogging, making it difficult to meet operational requirements.

[0004] Therefore, it is indeed necessary to provide an improved reciprocating tool to overcome the shortcomings of the existing technology. [Summary of the Invention]

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a reciprocating tool with a simple structure and good lubrication effect.

[0006] The present invention solves the existing technical problems by adopting the following technical solution: a reciprocating tool, comprising a housing, a drive mechanism and an execution mechanism mounted on the housing, and a motion conversion mechanism connected between the drive mechanism and the execution mechanism. The drive mechanism drives the motion conversion mechanism to rotate and drives the execution mechanism to perform reciprocating motion. The reciprocating tool includes a lubrication mechanism located above the execution mechanism. The lubrication mechanism and the inner wall of the housing form an oil storage cavity to lubricate the execution mechanism. The lubrication mechanism has an oil cap fixed to the housing, an oil outlet hole penetrating the oil cap, and a guide rib protruding from the oil cap toward the execution mechanism. The oil outlet hole communicates with the oil storage cavity, and the guide rib extends to the oil outlet hole.

[0007] A further improvement is as follows: the actuator has a reciprocating rod connected to the motion conversion mechanism and a first bearing and a second bearing sleeved on the outer periphery of the reciprocating rod, wherein the first bearing and the second bearing are respectively located at the two axial ends of the reciprocating rod.

[0008] A further improvement is that, along the axial direction of the reciprocating rod, the lubrication mechanism is located between the first bearing and the second bearing.

[0009] A further improvement is as follows: the guide rib has a first guide rib and a second guide rib disposed on both sides of the oil outlet hole, and the extension direction of the first guide rib intersects the extension direction of the second guide rib.

[0010] A further improvement is that the spacing between the first guide rib and the second guide rib gradually increases in the direction toward the reciprocating rod.

[0011] A further improvement is as follows: the housing has a main housing for mounting the drive mechanism and a gearbox connected to the main housing, the gearbox having an oil storage tank configured to store grease.

[0012] A further improvement is that the oil storage tank and the oil cap form the oil storage cavity.

[0013] A further improvement is that the gearbox also has an oil storage wall forming the oil storage tank, and the oil cap is fitted around the outer periphery of the oil storage wall.

[0014] A further improvement is that the actuator has a pressure plate located between the housing and the reciprocating rod, and the pressure plate abuts against the oil cap.

[0015] A further improvement is that, along the axial direction of the reciprocating rod, the minimum distance between the sidewall of the first guide rib and the first bearing is greater than the reciprocating stroke of the reciprocating tool.

[0016] Compared with the prior art, the present invention has the following advantages: an oil storage cavity is formed by the oil cap and the housing, and the grease flowing out of the oil outlet is guided to the reciprocating rod by the guide rib, thereby lubricating it. The structure is simple and the lubrication effect is good. [Attached Image Description]

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of the reciprocating tool according to a preferred embodiment of the present invention;

[0019] Figure 2 yes Figure 1 A cross-sectional view of the reciprocating tool shown;

[0020] Figure 3 yes Figure 1 The diagram shown is a partial disassembly diagram of the reciprocating tool;

[0021] Figure 4 yes Figure 2 A partial sectional view of the reciprocating tool shown;

[0022] Figure 5 yes Figure 4 A magnified view of a portion of the reciprocating tool shown;

[0023] Figure 6 yes Figure 3 The diagram shows the structure of the oil cap in the reciprocating tool.

[0024] Figure 7 yes Figure 3 The diagram shows the structure of the pressure plate in the reciprocating tool.

Detailed Implementation Methods

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0026] The terminology used in this invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," "rear," "left," and "right," which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0027] Please see Figures 1 to 3 As shown, the present invention relates to a reciprocating tool, with a reciprocating saw 100 as a preferred embodiment. The reciprocating saw 100 is widely used in decoration, construction, and other fields. The reciprocating saw 100 includes a housing 1, a drive mechanism 2 and an actuator 4 installed in the housing 1, a motion conversion mechanism 3 connecting the drive mechanism 2 and the actuator 4, a clamping mechanism 7 installed at the front end of the actuator 4, a base plate assembly 8 for adjusting the extension length of the saw blade, an electrical control assembly 9 for controlling the drive assembly 2, and a power source for providing electrical energy. The clamping mechanism 6 fixes the saw blade to the actuator 4. The drive mechanism 2 is activated by the power source, driving the motion conversion mechanism 3 and causing the actuator 4 and the saw blade to reciprocate, so that the reciprocating saw 100 performs high-frequency cutting on the workpiece.

[0028] In this embodiment, the aforementioned housing 1 includes a main housing 11 for mounting the drive mechanism 2 and a gearbox 12 connected to the main housing 11. The main housing 11 is made of plastic, and the gearbox 12 is made of metal. The main housing 11 and the gearbox 12 are connected by screws to complete the assembly of the components.

[0029] The main housing 11 has a longitudinally extending and cylindrical motor section 111, a first grip section 112 connected to the motor section 111, a battery connection section 113 located at the lower end of the first grip section 112, and a connecting section 114 connecting the motor section 111 and the battery connection section 113. The operator can grip the first grip section 112 with one hand or grip the first grip section 112 and the gearbox 12 with both hands at the same time to operate the reciprocating saw 100.

[0030] The gearbox 12 includes a housing 121 for mounting the motion conversion mechanism 3 and the actuator 4, and a cover 122 fixed to the housing 121. The housing 121 and the cover 122 secure the internal parts and prevent them from shaking. Preferably, a rubber sleeve 13 can be fitted over the gearbox 12 to improve grip comfort.

[0031] In this embodiment, the drive mechanism 2 includes a motor housing 24 mounted within the motor section 111, a motor 21 housed within the motor housing 24, a motor shaft 22 protruding into the housing 121, and a tapered portion 23 formed at the front end of the motor shaft 22. The tapered portion 23 engages with the motion conversion mechanism 3. The motor housing 24 covers the motor 21, and its modular design facilitates installation. Furthermore, the motor housing 24 and the motor section 111 form a double-layer housing, providing insulation protection on one hand and reducing vibration transmission on the other.

[0032] The aforementioned motion conversion mechanism 3 includes an intermediate shaft 31 housed within a housing 121, a large bevel gear 32 sleeved around the outer periphery of the intermediate shaft 31, a crank disc 33 disposed on the opposite side of the large bevel gear 32, and a crank pin 34 connecting the crank disc 33 and the actuator 4. The intermediate shaft 31 is rotatably mounted to the housing 121 via bearings, and the intermediate shaft 31 is arranged approximately perpendicular to the motor shaft 22. The lower end face of the large bevel gear 32 forms a bevel tooth, and the motor shaft 22 is located at the lower end of the large bevel gear 32, with the conical portion 23 meshing with the bevel tooth, thereby transmitting the rotation of the drive mechanism 2 to the motion conversion mechanism 3. The crank disc 33 is integrally formed with the large bevel gear 32, and a counterweight is disposed on the crank disc 33 to balance the eccentricity caused by the crank pin 34. The crank pin 34 is located off-center from the central axis of the intermediate shaft 31, allowing it to rotate eccentrically around the motor shaft 22, thereby driving the actuator 4 to reciprocate.

[0033] Combination Figure 4 and Figure 7As shown, the actuator 4 has a reciprocating rod 41 installed in the gearbox 12, a first bearing 42 and a second bearing 43 sleeved on the outer periphery of the reciprocating rod 41, a pressure plate 44 located between the housing 1 and the reciprocating rod 41, and a slide groove 45 connected to the motion conversion mechanism 3. The slide groove 45 is fixedly connected to the reciprocating rod 41 and is sleeved on the outer periphery of the crank pin 34 to convert the eccentric rotation of the crank pin 34 into the linear motion of the reciprocating rod 41. The first bearing 42 and the second bearing 43 are located at the axial ends of the reciprocating rod 41, and the first bearing 42 and the second bearing 43 can be fixed to the housing cover 122 by the pressure plate and screws. The pressure plate and screws ensure that the first bearing 42 and the second bearing 43 are non-rotatably fastened.

[0034] In the direction of extension of the reciprocating rod 41, the pressure plate 44 is located between the first bearing 42 and the second bearing 43, and the pressure plate 44 abuts against the slide groove 45, thereby preventing the reciprocating rod 41 from rotating.

[0035] In this embodiment, the pressure plate 44 is a stamped metal part, which has a support plate 441 extending along the length of the reciprocating rod 41, a guide wall 442 protruding from the support plate 441 toward the slide groove 45, a limiting wall 443 protruding from the end of the guide wall 442, a first pin 444 protruding from the support plate 441 toward the first bearing 42, a second pin 445 protruding from the support plate 441 toward the second bearing 43, and a through hole 446 penetrating the support plate 441 in the vertical direction. The guide wall 442 is located on the radially outer side of the reciprocating rod 41 and there is a certain gap between it and the reciprocating rod 41 to reduce the resistance during the movement of the reciprocating rod 41.

[0036] The support plate 411 is located above the slide groove 45, and the plane of the support plate 411 is parallel to the plane of the limiting wall 443. The limiting wall 443 presses against the inner wall of the gearbox 12 and the slide groove 45. Specifically, the upper end face of the limiting wall 443 abuts against the inner wall of the gearbox cover 122, and the lower end face of the limiting wall 443 abuts against the upper end face of the slide groove 45. The limiting wall 443 is mainly used to press against the slide groove 45 to prevent the reciprocating rod 41 from flipping during operation, thereby affecting the cutting quality and cutting efficiency. Preferably, the length of the limiting wall 443 is greater than or equal to the reciprocating stroke of the reciprocating saw 100.

[0037] The first pin 444 abuts against the first bearing 42, and the second pin 445 abuts against the second bearing 43; both the first pin 444 and the second pin 445 are spaced apart from the inner wall of the cover 122. Furthermore, the first pin 444 has a first limiting portion 444a parallel to the extending direction of the reciprocating rod 41 and abutting against the first bearing 42, and a first bent portion 444b connecting the first limiting portion 444a and the support plate 441, the extending direction of the first bent portion 444b intersecting the extending direction of the first limiting portion 444a. The second pin 445 has a second limiting portion 445a parallel to the extending direction of the reciprocating rod 41 and abutting against the second bearing 42, and a second bent portion 445b connecting the second limiting portion 445a and the support plate 441, the extending direction of the second bent portion 445b intersecting the extending direction of the second limiting portion 445a.

[0038] Combination Figure 5 and Figure 6 As shown, the reciprocating saw 100 also includes a lubrication mechanism 5 located above the actuator 4. The lubrication mechanism 5 and the housing 1 form an oil reservoir 6 to lubricate the actuator 4. Solid grease is stored in the oil reservoir 6. During the operation of the reciprocating saw 100, the grease flows from the oil reservoir 6 to the actuator 4, thereby lubricating the actuator, reducing resistance, and extending the service life of the actuator 4. In the front-rear direction, the lubrication mechanism 5 is located between the first bearing 42 and the second bearing 43, thereby lubricating the first bearing 42 and the second bearing 43.

[0039] In this embodiment, the lubrication mechanism 5 has an oil cap 51 fixed to the cover 122, an oil outlet 52 penetrating the oil cap 51 in the vertical direction, and a guide rib 53 protruding from the oil cap 51 toward the reciprocating rod 41. The oil outlet 52 is connected to the oil storage cavity 6, and the guide rib 53 extends to the oil outlet 52, so that grease flows out from the oil outlet 52 and flows to the reciprocating rod 41 via the guide rib 53. During the operation of the reciprocating rod 41, the grease is coated onto the first bearing 42 and the second bearing 43, reducing the wear between the bearings and the reciprocating rod 41 and avoiding the occurrence of local high temperature.

[0040] The gearbox 12 includes an oil reservoir 12a and an oil storage wall 12b forming the oil reservoir 12a. An oil cap 51 is fitted around the outer periphery of the oil storage wall 12b, forming an oil storage cavity 6 with the oil reservoir 12a. The oil reservoir 12a is configured to store grease. Furthermore, the oil cap 51 is interference-fitted with the oil storage wall 12b, and a pressure plate 44 abuts against the oil cap 51 to prevent it from falling off. The oil cap 51 and the oil storage wall 12b form a labyrinth seal to prevent grease from overflowing.

[0041] The aforementioned guide rib 53 is disposed on the outer wall of the oil cap 51 and is configured to guide the flow of grease. Specifically, the guide rib 53 has a first guide rib 531 and a second guide rib 532 disposed on both sides of the oil outlet 52. The extending direction of the first guide rib 531 intersects the extending direction of the second guide rib 532. The first guide rib 531 guides the grease toward the first bearing 42, and the second guide rib 532 guides the grease toward the second bearing 43.

[0042] Specifically, the spacing between the first guide rib 531 and the second guide rib 532 gradually increases in the direction toward the reciprocating rod 41, which is beneficial for guiding the grease. Furthermore, the minimum distance between the front sidewall of the first guide rib 531 and the rear end of the first bearing 42 is greater than the reciprocating stroke of the reciprocating saw 100, and the minimum distance between the rear sidewall of the second guide rib 532 and the front end of the second bearing 43 is greater than the reciprocating stroke of the reciprocating saw 100, allowing the grease to be applied to the first bearing 42 and the second bearing 43 during the operation of the reciprocating saw 100.

[0043] Preferably, the angle between the extending direction of the first guide rib 531 and the axis of the reciprocating rod 41 is in the range of 5°-30°, and the angle between the extending direction of the second guide rib 532 and the axis of the reciprocating rod 41 is in the range of 5°-30°, allowing the grease to fall along the first guide rib 531 and / or the second guide rib 532 onto the reciprocating rod 41. Further, if the angle between the extending direction of the first guide rib 531 and the axis of the reciprocating rod 41 is in the range of 7°, and the angle between the extending direction of the second guide rib 532 and the axis of the reciprocating rod 41 is in the range of 7°, the guiding effect is better.

[0044] In addition, the thickness of the first guide rib 531 and the second guide rib 532 can be less than the diameter of the reciprocating rod 41. Preferably, the thickness of the first guide rib 531 and the second guide rib 532 is 1 / 4 of the diameter of the reciprocating rod 41 to prevent grease from dripping into other areas.

[0045] Please refer to the following: Figure 1 and Figure 2 As shown, the electronic control assembly 9 in this embodiment includes an electronic control board 91 electrically connected to the drive mechanism 2 and the power source, a switch 92 controlling the operation of the drive mechanism 2, and a trigger 93 connected to the switch 92. Specifically, the electronic control board 91 may be located in at least one of the motor section 111, the connecting section 114, and the battery connecting section 113. The switch 92 and the trigger 93 are installed in the first grip section 112. When the operator grips the first grip section 112, he can pull the trigger 93 to trigger the switch 92, thereby activating the drive mechanism 2.

[0046] This utility model forms an oil storage cavity 6 by surrounding the oil cap 51 and the housing 1, and guides the grease flowing out of the oil outlet 52 to the reciprocating rod 41 through the guide rib 53, thereby lubricating the reciprocating saw 100. The structure is simple and the lubrication effect is good.

[0047] This utility model is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many other alternatives to the reciprocating tool of this utility model can be derived without departing from the principles and scope of this utility model. The scope of protection of this utility model is determined by the claims.

Claims

1. A reciprocating tool comprising a housing, a driving mechanism and an execution mechanism mounted to said housing, and a motion conversion mechanism connected between said driving mechanism and said execution mechanism, said driving mechanism driving said motion conversion mechanism to rotate and driving said execution mechanism to reciprocate, characterized in that: The reciprocating tool includes a lubrication mechanism located above the actuator. The lubrication mechanism and the inner wall of the housing form an oil storage cavity to lubricate the actuator. The lubrication mechanism has an oil cap fixed to the housing, an oil outlet hole penetrating the oil cap, and a guide rib protruding from the oil cap toward the actuator. The oil outlet hole communicates with the oil storage cavity, and the guide rib extends to the oil outlet hole. ​ 2. The reciprocating tool according to claim 1, characterized in that: The actuator has a reciprocating rod connected to the motion conversion mechanism and a first bearing and a second bearing sleeved on the outer periphery of the reciprocating rod, wherein the first bearing and the second bearing are respectively located at the two axial ends of the reciprocating rod.

3. The reciprocating tool according to claim 2, characterized in that: Along the axial direction of the reciprocating rod, the lubrication mechanism is located between the first bearing and the second bearing.

4. The reciprocating tool according to claim 3, characterized in that: The guide rib has a first guide rib and a second guide rib disposed on both sides of the oil outlet hole, and the extension direction of the first guide rib intersects the extension direction of the second guide rib.

5. The reciprocating tool according to claim 4, characterized in that: The spacing between the first guide rib and the second guide rib gradually increases in the direction toward the reciprocating rod.

6. The reciprocating tool according to claim 3, characterized in that: The housing has a main housing for mounting the drive mechanism and a gearbox connected to the main housing. The gearbox has an oil storage tank configured to store grease.

7. The reciprocating tool according to claim 6, characterized in that: The oil storage tank and the oil cap form the oil storage cavity.

8. The reciprocating tool according to claim 6, characterized in that: The gearbox also has an oil storage wall forming the oil storage tank, and the oil cap is fitted around the outer periphery of the oil storage wall.

9. The reciprocating tool according to claim 2, characterized in that: The actuator has a pressure plate located between the housing and the reciprocating rod, the pressure plate abutting against the oil cap.

10. The reciprocating tool according to claim 4, characterized in that: Along the axial direction of the reciprocating rod, the minimum distance between the sidewall of the first guide rib and the first bearing is greater than the reciprocating stroke of the reciprocating tool.

Images