Reciprocating transmission structure and electric tool

Abstract

The embodiment of the utility model relates to the technical field of tool lubrication, and discloses a reciprocating transmission structure and an electric tool. The reciprocating transmission structure comprises a driving piece and a driven piece. The driving part is provided with an eccentric cam. The driven piece is provided with a kidney-shaped hole, the eccentric cam is contained in the kidney-shaped hole, and the kidney-shaped hole moves along with rotation of the eccentric cam. The driven part is provided with a containing space which is recessed from the hole wall of the kidney-shaped hole to the center away from the kidney-shaped hole, and a filling pad is arranged in the containing space and soaked with lubricating oil. According to the reciprocating transmission structure and the electric tool provided by the embodiment of the invention, the lubricating effect between transmission parts can be improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of tool lubrication technology, and in particular to a reciprocating transmission structure and an electric tool. Background Art

[0002] Electric tools are being used in more and more construction scenarios due to their good operation convenience. Electric tools can perform corresponding construction operations by converting electrical energy into mechanical energy of the output parts that perform the operation. The use of electric tools can save manpower and improve construction efficiency.

[0003] Power tools include numerous mechanical parts, some of which are used to transmit power so that the output parts at the end of the power transmission can perform corresponding construction operations. These parts are in motion when the power tool is turned on, and require a certain medium for lubrication to make the movement of the parts smoother. How to improve the lubrication effect between transmission parts is an important issue. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a reciprocating transmission structure and an electric tool, which can improve the lubrication effect between transmission parts.

[0005] In order to solve the above technical problems, the embodiment of the present application provides a reciprocating transmission structure. The reciprocating transmission structure includes an active member and a driven member. The active member is provided with an eccentric cam. The driven member is provided with a waist-shaped hole, which accommodates the eccentric cam and moves as the eccentric cam rotates. The driven member is provided with a receiving space that is recessed from the hole wall of the waist-shaped hole away from the center of the waist-shaped hole, and the receiving space is provided with a filling pad, which is soaked with lubricating oil.

[0006] The embodiment of the present application further provides an electric tool, which includes a housing. The housing is provided with a driving member, a movable output member, and the above-mentioned reciprocating transmission structure. The active member of the reciprocating transmission structure is connected to the output end of the driving member, and the driven member of the reciprocating transmission structure is connected to the output member.

[0007] The reciprocating transmission structure and the electric tool provided by the embodiment of the present application form a receiving space at the hole wall of the waist-shaped hole of the driven member, and a filling pad is provided in the receiving space, and the filling pad is soaked with lubricating oil. When the driven member is driven by the active member to move, the eccentric cam of the active member will contact the filling pad, and then contact the lubricating oil. Thus, a lubrication effect is formed during the rotation of the eccentric cam. It is possible to improve the lubrication effect between the transmission parts during the movement coordination between the eccentric cam and the wall of the waist-shaped hole.

[0008] In some embodiments, the accommodating space is located at arc-shaped edges of the waist-shaped holes that are away from each other.

[0009] In some embodiments, a plurality of accommodating spaces are provided, and the plurality of accommodating spaces are symmetrically arranged about the waist-shaped hole.

[0010] In some embodiments, the accommodating space passes through a side surface of the driven member, and the filling pad is exposed from the surface of the driven member.

[0011] In some embodiments, the accommodating space includes a first part and a second part that are interconnected, the first part is adjacent to the hole wall of the waist-shaped hole, and the length of the first part in the moving direction of the follower is smaller than the length of the second part in the moving direction of the follower.

[0012] In some embodiments, an edge of the first portion transitions to an edge of the second portion at a right angle.

[0013] In some embodiments, the filling pad includes a filling portion filled in the accommodating space, and an extending portion connected to the filling portion, wherein the extending portion protrudes in the waist-shaped hole.

[0014] In some embodiments, the filling pad can be compressively deformed under pressure.

[0015] In some embodiments, the filling pad is a sponge pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0017] Figure 1 is a schematic diagram of a three-dimensional structure of a reciprocating transmission structure provided in some embodiments of the present application;

[0018] Figure 2 is a schematic diagram of a top view of a reciprocating transmission structure provided in some embodiments of the present application;

[0019] Figure 3 is a bottom view structural schematic diagram of a reciprocating transmission structure provided in some embodiments of the present application;

[0020] Figure 4 is a schematic diagram of the motion state of a reciprocating transmission structure provided in some embodiments of the present application;

[0021] Figure 5 is another schematic diagram of a motion state of a reciprocating transmission structure provided in some embodiments of the present application;

[0022] Figure 6 is a schematic diagram of a three-dimensional structure of a driven member in a reciprocating transmission structure provided in some embodiments of the present application;

[0023] Figure 7 is a schematic diagram of a top view of a driven member in a reciprocating transmission structure provided in some embodiments of the present application;

[0024] Figure 8 is a schematic diagram of the three-dimensional structure of the electric tool provided in some embodiments of the present application;

[0025] Fig. 9 It is a schematic diagram of the cross-sectional structure of the electric tool provided in some embodiments of the present application. DETAILED DESCRIPTION

[0026] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in each embodiment of the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not constitute any limitation, and the various embodiments can be combined with each other and referenced to each other without contradiction.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0028] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0029] In order to meet the automation needs of various tools, various power tools have begun to appear. These power tools are equipped with a power supply device or a cable that can draw power from the outside, which can be carried easily and perform automated operations. During the operation of the power tool, it converts electrical energy into mechanical energy of the corresponding output part. For example, a reciprocating saw or a jigsaw converts electrical energy into mechanical energy of the saw blade to perform cutting operations. Electric files convert electrical energy into mechanical energy of the file to perform grinding operations.

[0030] In the process of converting electrical energy into mechanical energy of the corresponding output part, power transmission of the transmission structure is usually experienced. The power input end of the transmission structure receives the power from the output end of the driving part such as a motor or an electric motor. After the transmission structure converts or decelerates the motion form, the power is transmitted to the output part for construction operations through the power output end. It should be noted that a reducer is usually connected to the output end of the driving part, such as a gear reducer using a gear mechanism. The rotation generated by the driving part can increase the torque after deceleration.

[0031] In order to make the transmission structure in the power tool run smoothly and move steadily, the transmission structure is usually designed to be lubricated. For example, the existing reciprocating saw applies highly viscous grease on the contact surface between the balance block and the cam of the eccentric disk to achieve the lubrication effect. However, due to the operation of the power tool, the temperature of the gear box will rise sharply, causing the lubricating medium to dry up due to partial evaporation at high temperature, and no longer have viscosity, resulting in a significant reduction in the lubrication effect.

[0032] Therefore, some embodiments of the present application provide a reciprocating transmission structure that can improve the lubrication effect between transmission components. While the mating surfaces of the active component and the driven component are lubricated by lubricating grease, a receiving space is provided on the wall of the waist-shaped hole of the driven component, and a filling pad is provided in the receiving space. The filling pad absorbs a lubricating medium that can play a lubricating role. As a result, the eccentric cam of the active component will contact the lubricating medium on the filling pad during each movement, thereby ensuring the lubrication effect between the transmission components.

[0033] Combine the following Figures 1 to 7 The reciprocating transmission structure provided by some embodiments of the present application is described.

[0034] like Figures 1 to 5 As shown, the reciprocating transmission structure provided in some embodiments of the present application includes a driving member 11 and a driven member 12. The driving member 11 is provided with an eccentric cam 111. The driven member 12 is provided with a waist-shaped hole 121, and the waist-shaped hole 121 accommodates the eccentric cam 111 therein and moves as the eccentric cam 111 rotates. The driven member 12 is provided with an accommodating space 122 that is recessed from the hole wall of the waist-shaped hole 121 to the center away from the waist-shaped hole 121, and the accommodating space 122 is provided with a filling pad 13, and the filling pad 13 is soaked with lubricating oil.

[0035] The active member 11 is the part of the reciprocating transmission structure that receives power input, and can be connected to the output end of the driving member in the power tool, or connected to the driven gear of the gear mechanism connected to the output end of the driving member. The driven member 12 is the part of the reciprocating transmission structure that outputs power, and can be connected to the output member in the power tool. After the active member 11 receives power input and moves, it will drive the driven member 12 to move through the cooperation with the driven member 12. Then the driven member 12 will transmit a specific form of movement to the output member at the end of the power to perform construction work.

[0036] The eccentric cam 111 provided on the active member 11 is formed at a position deviating from the rotation center. After the active member 11 is driven by the front moving part, the eccentric cam 111 will rotate around the rotation center of the active member 11, that is, it will rotate on a path around the rotation center of the active member 11. The waist-shaped hole 121 provided on the follower 12 can cooperate with the eccentric cam 111 provided on the active member 11. The edge of the waist-shaped hole 121 is in the shape of a runway, and has the characteristics of a short distance between two parallel straight edges and a long distance between two opposite arc edges. The diameter of the eccentric cam 111 is adapted to the distance between the two parallel straight edges of the waist-shaped hole 121. During the rotation of the eccentric cam 111, the waist-shaped hole 121 will move accordingly. The distance between the two opposite arc edges of the waist-shaped hole 121 is adapted to the diameter of the rotation path of the eccentric cam 111 away from the rotation center of the active member 11. The follower 12 can be provided with guide grooves at different positions to guide the movement process.

[0037] The accommodation space 122 of the follower 12 opens on the wall of the waist-shaped hole 121, and the accommodation space 122 can hold the filling pad 13. The filling pad 13 is soaked with lubricating oil, and the lubricating oil is adsorbed on the filling pad 13, thereby storing the lubricating oil. During the rotation of the eccentric cam 111, it will contact the filling pad 13, thereby contacting the lubricating oil, playing a lubricating role.

[0038] In the reciprocating transmission structure provided by some embodiments of the present application, a receiving space 122 is formed at the hole wall of the waist-shaped hole 121 of the driven member 12, and a filling pad 13 is provided in the receiving space 122, and the filling pad 13 is soaked with lubricating oil. In the process of the driven member 12 being driven and moved by the active member 11, the eccentric cam 111 of the active member 11 will contact the filling pad 13, and then contact the lubricating oil. Thus, a lubrication effect is formed during the rotation of the eccentric cam 111. It is possible to improve the lubrication effect between the transmission parts during the movement coordination between the eccentric cam 111 and the hole wall of the waist-shaped hole 121.

[0039] In order to adapt to lubrication under high temperature, the filling pad 13 can be pre-soaked with common lubricating oil, such as engine oil. By taking advantage of the fact that engine oil is not easy to evaporate at high temperature, the transmission parts can be supplemented with lubrication in each movement cycle. In actual situations, other lubricating media can also be adsorbed on the filling pad 13. The lubricating oil soaked in the filling pad 13 and the lubricating medium filled between the mating surfaces of the transmission parts work together to achieve a lubricating effect, which can make the parts cooperate more smoothly when moving relative to each other.

[0040] In some embodiments, the accommodation space 122 may be located at arc-shaped edges of the waist-shaped holes 121 that are away from each other.

[0041] The arc edges of the waist-shaped hole 121 that are away from each other are the dead point positions during the movement of the eccentric cam 111. Since there is a gap between the dead point position during the movement of the eccentric cam 111 and the two semicircular hole walls of the waist-shaped hole 121, it is not a positioning position, and the filling pad 13 is arranged here, which will not affect the positioning of the active member 11 during the movement.

[0042] In actual situations, the accommodating space 122 may also be disposed at other positions of the arc-shaped edge of the waist-shaped hole 121 , as long as it does not affect the movement process of the active component 11 .

[0043] In addition, a plurality of accommodating spaces 122 may be provided, and the plurality of accommodating spaces 122 are symmetrically arranged about the waist-shaped hole 121 .

[0044] Different filling pads 13 can be arranged in the plurality of accommodating spaces 122, thereby increasing the arrangement positions of the filling pads 13 storing lubricating oil. When the eccentric cam 111 moves to the corresponding position, it can contact the lubricating oil stored in the corresponding filling pad 13. By providing a plurality of accommodating spaces 122, the lubrication area on the mating surface between the eccentric cam 111 and the hole wall of the waist-shaped hole 121 can be increased, thereby improving the lubrication effect.

[0045] At the same time, the symmetrical arrangement of the accommodating space 122 can make the distribution of the lubrication area more uniform, so that each lubrication area can achieve a uniform lubrication effect.

[0046] like Figure 4 and Figure 5 As shown, a receiving space 122 is respectively provided at the semicircular portions on both sides of the waist-shaped hole 121 . Figure 4 The figure shows the structure in which the eccentric cam 111 does not reach the position of the accommodation space 122 during the movement. Figure 5 The structure in which the eccentric cam 111 reaches the position of the accommodation space 122 during the movement is shown. In one cycle of reciprocating motion of the transmission component, two supplementary lubrications of the lubricating oil can be obtained.

[0047] It should be noted that only one accommodating space 122 may be provided at the edge of the waist-shaped hole 121. A filling pad 13 soaked with lubricating oil is then placed in the accommodating space 122. During one cycle of reciprocating motion of the transmission component, lubricating oil can be replenished once.

[0048] like Figure 4 and Figure 5 As shown, the accommodating space 122 may penetrate through a side surface of the driven member 12 , and the filling pad 13 is exposed from the surface of the driven member 12 .

[0049] That is, the accommodating space 122 not only has an opening toward the center of the waist-shaped hole 121, but also has an opening formed on one side surface of the driven member 12. When placing the filling pad 13, the filling pad 13 can be inserted along the opening on one side surface of the driven member 12 formed in the accommodating space 122, thereby facilitating the assembly of the filling pad 13 in the accommodating space 122 and simplifying the placement operation of the filling pad 13.

[0050] Meanwhile, after the transmission components are assembled, the opening of the accommodating space 122 formed on one side surface of the driven component 12 can be closed by other components, such as the active component 11 forming a matching relationship.

[0051] like Figure 6 and Figure 7 As shown, the accommodating space 122 may include a first part 1221 and a second part 1222 that are interconnected, the first part 1221 is adjacent to the hole wall of the waist-shaped hole 121, and the length of the first part 1221 in the moving direction of the follower 12 is smaller than the length of the second part 1222 in the moving direction of the follower 12.

[0052] The first part 1221 and the second part 1222 are formed in different areas, and the first part 1221 is adjacent to the hole wall of the waist-shaped hole 121 and forms an opening toward the center of the waist-shaped hole 121. After the filling pad 13 is arranged in the accommodation space 122, the surface of the filling pad 13 located at the opening of the first part 1221 toward the center of the waist-shaped hole 121 will come into contact with the eccentric cam 111, thereby playing a lubricating role. By setting the first part 1221 and the second part 1222 to be narrow inside and wide outside, that is, the length of the first part 1221 in the moving direction of the follower 12 is less than the length of the second part 1222 in the moving direction of the follower 12, the filling pad 13 can be limited and effectively fixed in the accommodation space 122.

[0053] In addition, the connection between the edge of the first portion 1221 and the edge of the second portion 1222 may be arranged at a right angle.

[0054] That is, the edge of the first part 1221 and the edge of the second part 1222 are connected at a right angle. By making the edge of the first part 1221 and the edge of the second part 1222 form a right angle, the filling pad 13 can be effectively prevented from sliding in the receiving space 122 toward the center of the waist-shaped hole 121. The structural form of the receiving space 122 can also be simplified. The receiving space 122 can adopt a regular columnar structure so that the receiving space 122 is provided on the follower 12.

[0055] In some embodiments, the filling pad 13 may include a filling portion filled in the accommodating space 122 , and an extending portion connected to the filling portion, wherein the extending portion protrudes and is disposed in the waist-shaped hole 121 .

[0056] The filling part is accommodated in the accommodating space 122, and the extending part is connected to the filling part. The extending part protrudes in the waist-shaped hole 121 relative to the filling part. In other words, part of the filling pad 13 can be located outside the accommodating space 122 so as to better fill the periphery of the rotation path of the eccentric cam 111. In the process of rotation, the eccentric cam 111 can more smoothly contact the filling pad 13, thereby more smoothly contacting the lubricating oil, to achieve a lubricating effect.

[0057] In addition, the filling pad 13 can be compressed and deformed under the extrusion effect.

[0058] The filling pad 13 is made of a flexible material, and by utilizing the compression deformation property of the filling pad 13 , the normal rotation process of the eccentric cam 111 in the waist-shaped hole 121 can be prevented from being affected.

[0059] In actual situations, the filling pad 13 may be a sponge pad.

[0060] like Figure 8 and Fig. 9 As shown, some embodiments of the present application also provide an electric tool, which includes a housing 21. The housing 21 is provided with a driving member 22, a movable output member 23, and the above-mentioned reciprocating transmission structure. The active member 11 of the reciprocating transmission structure is connected to the output end of the driving member 22, and the driven member 12 of the reciprocating transmission structure is connected to the output member 23.

[0061] The electric tool may be a tool that uses a reciprocating transmission structure, such as a reciprocating saw. The output member 23 is an actuator located at the end of the power transmission in the electric tool. The output member 23 realizes a specific motion form through the transmission of the reciprocating transmission structure. The output end of the driving member 22 is connected to a gear mechanism. The rotation generated by the driving member 22 is transmitted to the active member 11 connected to the driven gear 24 after deceleration, and then further transmitted to the output member 23 in the form of linear movement through the driven member 12.

[0062] The transmission parts in the reciprocating transmission structure are lubricated by grease and the periodic lubrication effect of lubricating oil is superimposed on it, which can greatly improve the lubrication effect.

[0063] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present application, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. A reciprocating transmission structure, characterized in that: include: The active member is provided with an eccentric cam; A follower is provided with a waist-shaped hole, wherein the waist-shaped hole accommodates the eccentric cam and moves as the eccentric cam rotates; The driven member is provided with a receiving space which is recessed from the hole wall of the waist-shaped hole toward the center away from the waist-shaped hole, and the receiving space is provided with a filling pad which is soaked with lubricating oil.

2. The reciprocating transmission structure according to claim 1, characterized in that: The accommodating space is located at arc-shaped edges of the waist-shaped holes that are away from each other.

3. The reciprocating transmission structure according to claim 1 or 2, characterized in that: There are a plurality of accommodating spaces, and the plurality of accommodating spaces are symmetrically arranged about the waist-shaped hole.

4. The reciprocating transmission structure according to claim 1, characterized in that: The accommodating space penetrates from a side surface of the driven member, and the filling pad is exposed from the surface of the driven member.

5. The reciprocating transmission structure according to claim 1, characterized in that: The accommodating space includes a first part and a second part which are connected to each other, the first part is adjacent to the hole wall of the waist-shaped hole, and the length of the first part in the moving direction of the follower is smaller than the length of the second part in the moving direction of the follower.

6. The reciprocating transmission structure according to claim 5, characterized in that: An edge of the first portion transitions to an edge of the second portion at a right angle.

7. The reciprocating transmission structure according to claim 1, characterized in that: The filling pad comprises a filling portion filled in the accommodating space, and an extending portion connected to the filling portion, wherein the extending portion protrudes and is disposed in the waist-shaped hole.

8. The reciprocating transmission structure according to claim 7, characterized in that: The filling pad can be compressed and deformed under the action of squeezing.

9. The reciprocating transmission structure according to claim 8, characterized in that: The filling pad is a sponge pad.

10. An electric tool, characterized in that: include: A housing is provided with a driving member, a movable output member, and a reciprocating transmission structure as described in any one of claims 1 to 9, wherein the active member of the reciprocating transmission structure is connected to the output end of the driving member, and the driven member of the reciprocating transmission structure is connected to the output member.

Images