Jig saw

Abstract

The utility model belongs to the technical field of cutting instruments, and specifically relates to a jigsaw. The jigsaw includes a shell, a reciprocating rod, a guide structure, an oil storage layer and a saw blade, wherein an oil storage chamber is provided in the shell, a through hole is provided on the shell, and the oil storage chamber is connected to the through hole. Along the axial direction of the reciprocating rod, the reciprocating rod is slidably inserted into the through hole, the guide structure is provided in the oil storage chamber and connected to the inner wall of the shell, the reciprocating rod is slidably connected to the guide structure, the oil storage layer is connected to the guide structure, and the oil storage layer abuts against the reciprocating rod, and the saw blade is connected to the reciprocating rod. According to the jigsaw of this embodiment, by providing an oil storage chamber and a through hole connected to the oil storage chamber in the shell, and slidably inserting the reciprocating rod in the through hole, and the guide structure and the oil storage layer cooperate, the oil storage layer ensures that grease can be continuously supplied from the oil storage layer to the surface of the reciprocating rod, and then continuously provide lubricating grease to the reciprocating rod during its movement, thereby reducing wear.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting instruments, and in particular relates to a jigsaw. Background Art

[0002] In the traditional jigsaw reciprocating rod design, the reciprocating rod assembly moves up and down driven by the gears. During this movement, contact friction between the reciprocating rod and the spring sheet (i.e., the guide structure of the jigsaw reciprocating rod) is inevitable. As time goes by and the machine runs for a long time, the grease in the oil storage chamber will gradually age and decrease, resulting in poor lubrication between the reciprocating rod and the spring sheet. This insufficient lubrication will cause the spring sheet to wear more and even break, thus affecting the normal operation and service life of the machine. Utility Model Content

[0003] The purpose of the utility model is to at least solve the problem of poor lubrication between the reciprocating rod and its guide structure due to aging of the grease in the oil storage cavity. This purpose is achieved through the following technical solutions:

[0004] The utility model provides a jigsaw, comprising:

[0005] A housing, wherein a through hole is formed on the housing, an oil storage cavity is provided in the housing, and the oil storage cavity is communicated with the through hole;

[0006] A reciprocating rod, the reciprocating rod is slidably disposed in the through hole along its axial direction;

[0007] A guide structure, wherein the guide structure is arranged in the oil storage cavity, and the reciprocating rod is slidably matched with the guide structure;

[0008] An oil reservoir, the oil reservoir is connected to the guide structure and abuts against the reciprocating rod;

[0009] A saw blade is arranged outside the housing and connected to the reciprocating rod.

[0010] According to the jigsaw of the utility model, by providing an oil storage chamber and a through hole connected to the oil storage chamber in the housing, and by slidably passing a reciprocating rod through the through hole, and by providing an oil storage layer on the guide structure, the reduction or aging of grease can be avoided to a certain extent, and the continuous and effective lubrication of the reciprocating rod is achieved. Furthermore, the oil storage layer ensures that grease can be continuously supplied from the oil storage layer to the outer circumferential surface of the reciprocating rod, and then during the movement of the reciprocating rod, lubricating grease is continuously provided to it, thereby reducing wear.

[0011] In addition, the jigsaw according to the utility model may also have the following additional technical features:

[0012] In some embodiments of the utility model, the guide structure includes a fixed body and at least one spring sheet connected to the fixed body, the fixed body is connected to the inner wall of the shell, one end of the spring sheet is connected to the fixed body, and the other end of the spring sheet is abutted against the reciprocating rod.

[0013] In some embodiments of the present invention, there are two spring sheets, and the two spring sheets are spaced apart along the circumferential direction of the reciprocating rod.

[0014] In some embodiments of the present invention, the spring sheet and the fixed body are arranged at an angle to form a receiving space, and the oil storage layer is arranged in the receiving space.

[0015] In some embodiments of the present invention, the oil storage layer is connected to the oil storage cavity.

[0016] In some embodiments of the present invention, the oil storage layer is a wool felt layer or a sponge layer.

[0017] In some embodiments of the present invention, an elastic support structure is provided in the oil reservoir, and the elastic support structure is respectively in contact with the reciprocating rod and the guide structure.

[0018] In some embodiments of the present invention, the guide structure is a metal guide structure.

[0019] In some embodiments of the present invention, the jigsaw further includes a sealing structure, wherein the sealing structure abuts against the reciprocating rod and the through hole respectively.

[0020] In some embodiments of the present invention, the jigsaw further includes a limiting portion, and the limiting portion is respectively connected to the inner wall of the shell and the reciprocating rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0022] Figure 1 The structure diagram of the jigsaw (when the housing is hidden) according to the embodiment of the utility model is schematically shown;

[0023] Figure 2 Schematically shows a front view of a jigsaw (when the housing is hidden) according to an embodiment of the utility model;

[0024] Figure 3 for Figure 2 Sectional view of the AA plane;

[0025] Figure 4 Schematically shows a top view of a jigsaw (when the housing is hidden) according to an embodiment of the utility model;

[0026] Figure 5 The right side view of the jig saw according to the embodiment of the utility model is schematically shown.

[0027] The reference numerals are as follows:

[0028] 100, jigsaw; 101, saw blade; 10, housing; 11, oil storage chamber; 20, reciprocating rod; 30, guide structure; 31, fixed body; 32, spring sheet; 40, oil storage layer; 50, first limit block; 51, second limit block; 60, sealing structure. DETAILED DESCRIPTION

[0029] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0030] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0031] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0032] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0033] like Figures 1 to 5 As shown, according to the embodiment of the utility model, a jig saw 100 is proposed, and the jig saw 100 includes a housing 10, a reciprocating rod 20, a guide structure 30, an oil storage layer 40 and a saw blade 101, wherein an oil storage chamber 11 is provided in the housing 10, a through hole is provided on the housing 10, and the oil storage chamber 11 is connected to the through hole. Along the axial direction of the reciprocating rod 20, the reciprocating rod 20 is slidably inserted into the through hole, the guide structure 30 is provided in the oil storage chamber 11 and connected to the inner wall of the housing 10, the reciprocating rod 20 is slidably matched with the guide structure 30, the oil storage layer 40 is connected to the guide structure 30, and the oil storage layer 40 abuts against the reciprocating rod 20, and the saw blade 101 is provided outside the housing 10 and connected to the reciprocating rod 20.

[0034] According to the jigsaw 100 of this embodiment, by providing the oil storage chamber 11 and the through hole communicating with the oil storage chamber 11 in the housing 10, and slidably passing the reciprocating rod 20 in the through hole, and by configuring the guide structure 30 and the oil storage layer 40, the reduction or aging of grease can be avoided to a certain extent, and the continuous and effective lubrication of the reciprocating rod 20 is achieved. Furthermore, the oil storage layer 40 ensures that grease can be continuously supplied from the oil storage layer 40 to the outer circumferential surface of the reciprocating rod 20, and then during the movement of the reciprocating rod 20, lubricating grease is continuously provided to it, thereby reducing wear.

[0035] In some embodiments, the guide structure 30 includes a fixed body 31 and at least one spring sheet 32 ​​connected to the fixed body 31, the fixed body 31 is connected to the inner wall of the housing 10, one end of the spring sheet 32 ​​is connected to the fixed body 31, and the other end of the spring sheet 32 ​​is in contact with the reciprocating rod 20. The fixed body 31 is fixedly connected to the inner wall of the housing 10 to ensure the stability of the overall structure. One end of the spring sheet 32 ​​is connected to the fixed body 31, and the other end of the spring sheet 32 ​​is freely in contact with the reciprocating rod 20. It is designed with appropriate elastic preload to ensure that the spring sheet 32 ​​can effectively transmit power and provide continuous and stable lubrication during the reciprocating motion. In addition, the material of the spring sheet 32 ​​is selected from materials with high elasticity and good wear resistance, such as spring steel or a specific alloy, to enhance its durability and reliability. The design of the fixed body 31 fixedly connected to the inner wall of the housing 10 enhances the stability of the entire guide structure 30, ensures the precise guidance of the reciprocating rod 20 in high-speed motion, and reduces mechanical vibration and noise. The spring sheet 32 ​​provides an elastic preload for the reciprocating rod 20, ensuring that it can maintain an appropriate contact pressure with the reciprocating rod 20 during the reciprocating motion, ensuring the smooth sliding of the reciprocating rod 20, and reducing wear and improving movement efficiency through the lubrication provided by the oil reservoir 40.

[0036] Specifically, there are two spring sheets 32, and the two spring sheets 32 are arranged at intervals along the circumferential direction of the reciprocating rod 20. Specifically, the two spring sheets 32 can be symmetrically arranged on both sides of the fixed body 31. The two spring sheets 32 are symmetrically arranged on both sides of the fixed body 31, and are connected to the fixed body 31 and the reciprocating rod 20. Each spring sheet 32 ​​is precisely calculated and designed to ensure that they can provide balanced force during the movement of the reciprocating rod 20, optimize the movement trajectory of the reciprocating rod 20, and reduce offset and wear. In addition, the setting of the two spring sheets 32 also considers increasing the contact area of ​​the oil reservoir 40 to improve the lubrication efficiency. In addition, the contact points between the spring sheets 32 and the reciprocating rod 20 use wear-resistant material gaskets or coatings to further reduce the friction coefficient and improve durability. Through the symmetrical configuration of the two spring sheets 32, it is possible to provide a balanced force when the reciprocating rod 20 moves, effectively optimize the movement trajectory of the reciprocating rod 20, reduce unnecessary friction and wear caused by movement offset, and improve mechanical efficiency and stability.

[0037] It is understandable that the spring sheet 32 ​​and the fixed body 31 are arranged at an angle to form a receiving space, and the oil storage layer 40 is arranged in the receiving space. The design of this angle is optimized to ensure that the capacity and surface contact area of ​​the oil storage layer 40 can be maximized to improve the storage and release efficiency of the lubricating oil. The material used in the oil storage layer 40 has a high oil absorption rate and good grease release performance, such as modified wool felt or special sponge, to meet the continuous long-term lubrication needs. Furthermore, the design of the angle and the oil storage layer 40 takes into account the dynamic characteristics of the movement of the reciprocating rod 20 to ensure that the lubricating oil can be evenly and continuously delivered to the surface of the reciprocating rod 20 during the reciprocating motion. The oil storage layer 40 optimized by the angle design can maximize the amount of lubricating oil stored and increase the contact area with the reciprocating rod 20, thereby effectively improving the release efficiency and lubrication effect of the lubricating oil.

[0038] In some embodiments, the oil reservoir 40 is connected to the oil storage chamber 11. In this embodiment, because the guide structure 30 is disposed in the oil storage chamber 11, the oil reservoir 40 can be connected to the oil storage chamber 11 as long as it is disposed on the outer surface of the guide structure 30. Alternatively, the oil reservoir 40 is disposed in the guide structure 30, and one or more fine-tuning control valves or adjustable flow control devices are disposed at the connecting port between the oil reservoir 40 and the oil storage chamber 11 to accurately control the grease flow from the oil storage chamber 11 to the oil reservoir 40. This embodiment ensures a continuous and stable supply of lubricating oil, reduces component wear and failure caused by insufficient lubrication, thereby significantly improving the reliability and durability of the equipment and extending the service life of the equipment.

[0039] In some embodiments, the oil storage layer 40 is a wool felt layer or a sponge layer. The wool felt layer adopts a modified wool felt with high density and high oil absorption, while the sponge layer adopts an open-pore polymer material with good elasticity and high oil retention capacity. By using a modified wool felt with high density and high oil absorption or a sponge material with good elasticity and high oil retention capacity, the oil storage layer 40 can absorb and release lubricating oil more effectively, provide continuous and uniform lubrication for the reciprocating rod 20, and significantly reduce friction and wear. The selected special materials improve the oil retention capacity of the oil storage layer 40, ensure long-term lubrication effect, reduce maintenance and replacement frequency, and thus improve the operating efficiency and service life of the equipment.

[0040] In some embodiments, an elastic support structure is provided in the oil reservoir 40, and the elastic support structure abuts against the reciprocating rod 20 and the guide structure 30 respectively. The elastic support structure is a metal wire, and the metal wire needs to be selected from a material with high elasticity and excellent wear resistance, such as stainless steel wire or nickel-titanium alloy (memory alloy) wire. The metal wire is designed as a prestressed structure, and through precise shape memory design, it maintains a predetermined shape without external force, but can provide appropriate elastic force when subjected to the force of the movement of the reciprocating rod 20 to maintain good contact and lubrication effects. In addition, the layout and number of the metal wires need to be optimized to ensure that they can provide uniform support and effective lubricating oil transfer during the movement of the reciprocating rod 20. The metal wires are interspersed in the oil reservoir 40. For example, when the oil reservoir 40 is a sponge layer, the metal wires are interspersed in the sponge layer to provide a supporting force for the sponge layer. By using a prestressed and shape memory designed metal wire as an elastic support structure, the oil reservoir 40 can maintain good contact with the reciprocating rod 20 during the movement of the reciprocating rod 20, effectively transfer lubricating oil, and ensure lubrication efficiency and uniformity. The elastic properties and shape memory ability of the metal wire enable the elastic support structure to adapt to the dynamic movement of the reciprocating rod 20, provide stable support force, optimize the dynamic response characteristics of the equipment, and reduce vibration and noise.

[0041] In some embodiments, the guide structure 30 is a metal guide structure 30. In order to further improve the performance of the guide structure 30, the surface of the guide structure 30 may be specially treated, such as coating a wear-resistant layer (such as a titanium carbide layer) or performing a surface hardening treatment to enhance its wear resistance and reduce the friction coefficient. By using a high-strength, high-wear-resistant material and performing a special surface treatment on the metal guide structure 30, the wear resistance is significantly enhanced, and the service life of the guide structure 30 and the entire device is extended.

[0042] In some embodiments, the jigsaw 100 further includes a sealing structure 60, which is in contact with the reciprocating rod 20 and the through hole, respectively. In order to further optimize the sealing effect, the sealing structure 60 uses a high-performance sealing material, such as polytetrafluoroethylene (PTFE), silicone rubber or other high-wear-resistant and high-temperature-resistant materials, with good elasticity and compatibility. The sealing structure 60 is an annular structure, which is designed to be easy to install and replace, while ensuring good sealing performance under high-speed movement of the reciprocating rod 20 and different working conditions, preventing lubricating oil leakage and external contaminants from entering. The high-performance sealing material and design of the sealing structure 60 can effectively block external contaminants, such as dust and debris, from entering the interior of the machine, protect internal components from damage, and maintain the cleanliness and normal operation of the equipment.

[0043] In some embodiments, the jigsaw 100 further includes a limiting portion, which is connected to the inner wall of the housing 10 and the reciprocating rod 20, respectively, to limit the reciprocating rod 20. The limiting portion includes a first limiting block 50 and a second limiting block 51. The first limiting block 50 is fixed to the inner wall of the housing 10, and is transmission-connected to the reciprocating rod 20 through a connecting rod. By limiting the connecting rod, the top of the reciprocating rod 20 is limited. The second limiting block 51 is fixedly connected to the housing 10 and is disposed below the guide structure 30. A limiting hole is provided on the second limiting block 51, and the reciprocating rod 20 directly passes through the limiting hole. The second limiting block 51 directly limits the reciprocating rod 20.

[0044] In a specific embodiment, the jigsaw 100 comprises a housing 10 provided with an oil storage chamber 11 and a through hole, and a reciprocating rod 20 slidably arranged in the through hole, the reciprocating rod 20 is connected to the saw blade 101, and the reciprocating motion of the reciprocating rod 20 drives the saw blade 101 to move, thereby cutting the object to be cut. The guide structure 30 is installed in the oil storage chamber 11 and connected to the inner wall of the housing 10, so as to realize the stable motion of the reciprocating rod 20. The oil storage layer 40, as the core of the lubrication system, is connected to the guide structure 30 and abuts against the reciprocating rod 20, and the oil storage layer 40 adopts a wool felt layer or a sponge layer to continuously supply lubricating oil. The guide structure 30 comprises a fixed body 31 and two spring sheets 32 arranged at an angle, one end of the spring sheet 32 ​​is connected to the fixed body 31, and the other free end is connected to the reciprocating rod 20, wherein the spring sheet 32 ​​adopts an elastic metal sheet to provide stable and precise guidance, and a metal wire is arranged in the oil storage layer 40, and the metal wire provides support for the oil storage layer 40. In addition, the jigsaw 100 is also designed with a sealing structure 60 to prevent the leakage of lubricating oil and prevent the entry of external pollutants, and a positioning part is provided to further improve the cutting accuracy and equipment stability. Through this series of technical improvements, the jigsaw 100 of this embodiment shows significant advantages in improving lubrication efficiency, reducing wear, improving cutting accuracy and equipment stability, effectively extending the service life of the equipment and reducing maintenance costs.

[0045] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A jigsaw, characterized in that: include: A housing, wherein a through hole is formed on the housing, an oil storage cavity is provided in the housing, and the oil storage cavity is communicated with the through hole; A reciprocating rod, the reciprocating rod is slidably disposed in the through hole along its axial direction; A guide structure, wherein the guide structure is arranged in the oil storage cavity, and the reciprocating rod is slidably matched with the guide structure; An oil reservoir, the oil reservoir is connected to the guide structure and abuts against the reciprocating rod; A saw blade is arranged outside the housing and connected to the reciprocating rod.

2. The jigsaw according to claim 1, characterized in that The guide structure includes a fixed body and at least one spring sheet connected to the fixed body, the fixed body is connected to the inner wall of the shell, one end of the spring sheet is connected to the fixed body, and the other end of the spring sheet abuts against the reciprocating rod.

3. The jig saw according to claim 2, characterized in that The number of the spring sheets is two, and the two spring sheets are arranged at intervals along the circumferential direction of the reciprocating rod.

4. The jig saw according to claim 2, characterized in that: The spring sheet and the fixed body are arranged at an angle to form a receiving space, and the oil storage layer is arranged in the receiving space.

5. The jigsaw according to any one of claims 1 to 4, characterized in that: The oil storage layer is communicated with the oil storage cavity.

6. The jigsaw according to any one of claims 1 to 4, characterized in that: The oil storage layer is a wool felt layer or a sponge layer.

7. The jigsaw according to any one of claims 1 to 4, characterized in that: An elastic support structure is arranged in the oil reservoir, and the elastic support structure is respectively in contact with the reciprocating rod and the guide structure.

8. The jigsaw according to any one of claims 1 to 4, characterized in that: The guide structure is a metal guide structure.

9. The jigsaw according to any one of claims 1 to 4, characterized in that: The jigsaw further includes a sealing structure, which is respectively in contact with the reciprocating rod and the through hole.

10. The jigsaw according to any one of claims 1 to 4, characterized in that: The jigsaw further includes a limiting portion, which is respectively connected to an inner wall of the housing and the reciprocating rod.

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