Reciprocating assembly and reciprocating saw

Abstract

The invention belongs to the technical field of electric tools, and particularly relates to a reciprocating assembly and a reciprocating saw. A reciprocating assembly comprises a transmission wheel, a connecting pin, a reciprocating rod, a transmission shaft and a balance part. The connecting pin is connected to one side of the transmission wheel; the reciprocating lever is in transmission connection with the transmission wheel through a connecting pin; the transmission shaft is connected to the transmission wheel and extends towards the side away from the connecting pin. The balance part is in transmission connection with the transmission wheel through a transmission shaft; and the transmission wheel is configured to drive the reciprocating rod to do reciprocating rectilinear motion and simultaneously drive the balance piece to do reciprocating rectilinear motion opposite to the motion direction of the reciprocating rod. According to the reciprocating assembly in the technical scheme, the reciprocating rod and the balance part are arranged on the two sides of the transmission wheel respectively, the transmission shaft is only subjected to acting force of the transmission wheel and the balance part, and compared with a structure in the prior art, the burden of the transmission shaft is reduced, so that the durability of the whole structure is higher.

Description

Technical Field

[0001] The invention belongs to the technical field of electric tools, and in particular relates to a reciprocating assembly and a reciprocating saw. Background Art

[0002] A reciprocating saw is a handheld electric tool that uses the reciprocating motion of the saw blade to complete the sawing work. During the operation of the reciprocating saw, the tool head will perform periodic reciprocating motion, and this reciprocating motion will generate unbalanced force. Unbalanced force is the main factor causing the reciprocating saw to vibrate when it is unloaded or in sawing motion. In order to effectively reduce the vibration problem caused by unbalanced force and improve the stability and sawing accuracy of the reciprocating saw, it is usually necessary to add a counterweight to the transmission gear. The centrifugal force generated by the counterweight can achieve the effect of balancing the movement of the reciprocating saw tool head.

[0003] In existing technical solutions, the counterweight and the reciprocating rod are often designed to be installed on the same side of the transmission wheel. Although such a design can achieve balance to a certain extent, it also brings new problems. Since the forces of the counterweight, the reciprocating rod and the transmission gear are all concentrated on the gear shaft, the gear shaft bears a greater burden. Long-term high-load work may cause damage to the gear shaft, which not only affects the service life of the reciprocating saw, but also has an adverse effect on the durability of the entire machine. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of how to reduce the burden on the transmission shaft, thereby increasing the life of the whole machine. This purpose is achieved through the following technical solutions:

[0005] A first aspect of the present invention provides a reciprocating assembly, comprising:

[0006] Transmission wheel;

[0007] A connecting pin connected to one side of the transmission wheel;

[0008] A reciprocating rod, drivingly connected to the transmission wheel via the connecting pin;

[0009] A transmission shaft connected to the transmission wheel and extending toward a side away from the connecting pin;

[0010] A balancing member, connected to the transmission wheel through the transmission shaft;

[0011] The transmission wheel is configured to drive the reciprocating rod to perform reciprocating linear motion, and at the same time, drive the balancing member to perform reciprocating linear motion in a direction opposite to the motion direction of the reciprocating rod.

[0012] In the reciprocating component of this technical solution, the reciprocating rod and the balancing member are respectively arranged on both sides of the transmission wheel. The reciprocating rod is connected to the transmission wheel through a connecting pin, and the balancing member is connected to the transmission wheel through a transmission shaft. Since the balancing member and the reciprocating rod perform reciprocating linear motions in opposite directions, the balancing member can offset the unbalanced force generated by the motion of the reciprocating rod. The reciprocating component in this form has a compact structure and a simple assembly process. Moreover, the transmission shaft is only subjected to the acting forces of the transmission wheel and the balancing member. Compared with the structure in the prior art, the burden on the transmission shaft is reduced, so the durability of the overall structure is stronger.

[0013] In addition, the reciprocating component of the present invention may further have the following additional technical features:

[0014] An eccentric wheel is connected to one end of the transmission shaft away from the transmission wheel. The balancing member is provided with a first connection hole. The eccentric wheel is located inside the first connection hole, and the outer periphery of the eccentric wheel abuts against the hole wall of the first connection hole. The rotation of the eccentric wheel drives the balancing member to perform a reciprocating linear motion.

[0015] In some embodiments of the present invention, the connecting pin is eccentrically arranged relative to the transmission wheel. One end of the reciprocating rod connected to the connecting pin is provided with a second connection hole. The outer periphery of the connecting pin abuts against the hole wall of the second connection hole. When the connecting pin rotates around the rotation center of the transmission wheel, the reciprocating rod performs a reciprocating linear motion.

[0016] In some embodiments of the present invention, a roller bearing is sleeved on the connecting pin. The connecting pin abuts against the hole wall of the second connection hole through the roller bearing, and the roller bearing is in rolling contact with the hole wall of the second connection hole.

[0017] In the second aspect of the present invention, a reciprocating saw is proposed, which includes:

[0018] An installation box;

[0019] A limiting component;

[0020] A driving component; and

[0021] The reciprocating component in the above embodiments, the limiting component, the driving component and the reciprocating component are all connected to the installation box, and the driving component is used to drive the transmission wheel to rotate.

[0022] In some embodiments of the present invention, the installation box includes a first connection seat. The first connection seat is provided with a through groove, the transmission shaft passes through the through groove, a transmission bearing is sleeved on the transmission shaft, and the transmission shaft is in transmission connection with the inner wall of the through groove through the transmission bearing. The transmission wheel is arranged in the through groove, the balancing member is located at the bottom of the installation box, and one end of the transmission shaft away from the transmission wheel passes out of the through groove and is in transmission connection with the balancing member.

[0023] In some embodiments of the present invention, a guide rod is provided at the bottom of the first connection seat, a guide groove is provided on one side of the balancing member facing the first connection seat, and the guide rod is located inside the guide groove.

[0024] In some embodiments of the present invention, the installation box further includes a second connection seat connected to the first connection seat. The limiting component includes a guiding member, a support arm and a baffle. The guiding member is connected to the bottom of the second connection seat. The guiding member is provided with a sliding groove. One end of the support arm is slidably arranged in the sliding groove, the other end of the support arm is connected to the baffle, and an avoidance opening is provided on the baffle. The saw blade of the reciprocating saw extends out from the avoidance opening.

[0025] In some embodiments of the present invention, a guiding bearing is connected to the top of the second connection seat. The guide rod passes through the guiding bearing and can make a reciprocating linear motion along the axial direction of the guiding bearing.

[0026] In some embodiments of the present invention, the installation box further includes a third connection seat connected to the first connection seat. The third connection seat is provided with an avoidance hole. The axial direction of the avoidance hole is perpendicular to the axial direction of the transmission wheel. The driving component includes a driving motor, an output shaft and a driving wheel. The driving wheel is connected to the driving motor through the output shaft. The driving motor is used to drive the output shaft to rotate. The driving wheel passes through the avoidance hole and is in transmission connection with the transmission wheel. A third transmission bearing is sleeved on the output shaft, and the output shaft is in transmission connection with the third connection seat through the third transmission bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0028] Figure 1 Schematically shows a structural diagram of a reciprocating component according to an embodiment of the present invention;

[0029] Figure 2Schematically shows an exploded view of a reciprocating assembly according to an embodiment of the present invention;

[0030] Figure 3 Schematically shows a partial structural schematic diagram of a reciprocating saw according to an embodiment of the present invention;

[0031] Figure 4 Schematically shows an exploded view of a partial structure of a reciprocating saw according to an embodiment of the present invention;

[0032] Figure 5 Schematically shows an exploded view of a limiting assembly according to an embodiment of the present invention;

[0033] Figure 6 Schematically shows a structural schematic diagram of a driving assembly according to an embodiment of the present invention.

[0034] The reference numerals in the drawings are represented as follows:

[0035] 100, reciprocating assembly; 110, transmission wheel; 120, connecting pin; 121, roller bearing; 130, reciprocating rod; 131, second connecting hole; 140, transmission shaft; 150, balancing member; 151, guiding groove; 160, eccentric wheel; 170, transmission bearing; 171, first transmission bearing; 172, second transmission bearing;

[0036] 200, limiting assembly; 210, guiding member; 211, bottom plate; 211a, through hole; 212, first side plate; 212a, sliding groove; 220, support arm; 221, support plate; 221a, elongated hole; 222, second side plate; 222a, clamping groove; 230, baffle; 240, elastic member; 250, support pin; 251, support block; 252, connecting rod; 260, button;

[0037] 300, driving assembly; 310, driving wheel; 320, driving motor; 330, cage; 340, airbag; 350, third transmission bearing; 360, connecting member;

[0038] 400, mounting box; 410, first connecting seat; 411, through slot; 412, guiding rod; 413, extension portion; 420, second connecting seat; 421, guiding bearing; 422, limiting projection; 423, fixing piece; 430, third connecting seat; 431, avoidance hole. Detailed embodiments

[0039] 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 drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0040] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0041] Although the terms first, second, third, etc. may be used herein 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 may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0042] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature, such as "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can include both the upper and lower orientations.

[0043] Figure 1Schematically shown is a structural diagram of a reciprocating assembly 100 according to an embodiment of the present invention. Figure 2 Schematically shown is an exploded view of a reciprocating assembly 100 according to an embodiment of the present invention. As Figure 1 and Figure 2 shown, the present invention provides a reciprocating assembly 100, including a driving wheel 110, a connecting pin 120, a reciprocating rod 130, a transmission shaft 140 and a balancing member 150; the connecting pin 120 is connected to one side of the driving wheel 110; the reciprocating rod 130 is drivingly connected to the driving wheel 110 through the connecting pin 120; the transmission shaft 140 is connected to the driving wheel 110 and extends toward the side away from the connecting pin 120; the balancing member 150 is drivingly connected to the driving wheel 110 through the transmission shaft 140; the driving wheel 110 is configured to drive the reciprocating rod 130 to perform a reciprocating linear motion, and at the same time, drive the balancing member 150 to perform a reciprocating linear motion in the direction opposite to the motion direction of the reciprocating rod 130.

[0044] In the reciprocating assembly 100 of this technical solution, the reciprocating rod 130 and the balancing member 150 are respectively arranged on both sides of the driving wheel 110. The reciprocating rod 130 is connected to the driving wheel 110 through the connecting pin 120, and the balancing member 150 is connected to the driving wheel 110 through the transmission shaft 140. Since the balancing member 150 and the reciprocating rod 130 perform reciprocating linear motions in opposite directions, the balancing member 150 can offset the unbalanced force generated by the motion of the reciprocating rod 130. The reciprocating assembly 100 adopting this form makes the structure compact and the assembly process simple. Moreover, the transmission shaft 140 is only subjected to the acting forces of the driving wheel 110 and the balancing member 150. Compared with the structure in the prior art, the burden on the transmission shaft 140 is reduced, so that the durability of the overall structure is stronger.

[0045] Further, an eccentric wheel 160 is connected to the end of the transmission shaft 140 away from the driving wheel 110. The balancing member 150 is provided with a first connection hole. The eccentric wheel 160 is located inside the first connection hole, and the outer circumference of the eccentric wheel 160 abuts against the hole wall of the first connection hole. The rotation of the eccentric wheel 160 drives the balancing member 150 to perform a reciprocating linear motion.

[0046] By adopting this structure, the eccentric wheel 160 transmits the power of the transmission shaft 140 to the balance member 150, effectively realizing the conversion and transmission of power, and enhancing the overall working efficiency and stability of the reciprocating assembly 100. The hole wall of the first connection hole has two abutting surfaces arranged oppositely, and is located in front of and behind the eccentric wheel 160 respectively. During the operation of the reciprocating saw, the driving wheel 110 drives the transmission shaft 140 to rotate, and then the transmission shaft 140 drives the eccentric wheel 160 to rotate. When the eccentric wheel 160 rotates to abut against the front abutting surface, the balance member 150 moves forward. When the eccentric wheel 160 rotates to abut against the rear abutting surface, the balance member 150 moves backward, thus realizing the reciprocating motion of the balance member 150. Optionally, the first connection hole can be an oval hole, and the eccentric wheel 160 can be cylindrical. It can be understood that the structure of the balance member 150 and the structure of the reciprocating rod 130 are cooperatively arranged to ensure that the center of gravity position of the balance member 150 is coordinated with the movement track of the reciprocating rod 130, ensuring that the balance member 150 can effectively offset vibrations during high-speed operation and improving the overall operation stability. Optionally, a plurality of weight-reducing holes are provided on the eccentric wheel 160. The setting of the weight-reducing holes helps to reduce the overall mass of the eccentric wheel 160, further improving the response speed and dynamic balance performance of the reciprocating assembly 100, so that the reciprocating assembly 100 can also maintain a stable and efficient operating state during high-intensity work.

[0047] Continue to refer to Figure 1 and Figure 2 , the connecting pin 120 is eccentrically arranged relative to the driving wheel 110. A second connecting hole 131 is provided at one end of the reciprocating rod 130 connected to the connecting pin 120. The outer circumference of the connecting pin 120 abuts against the hole wall of the second connecting hole 131. When the connecting pin 120 rotates around the rotation center of the driving wheel 110, the reciprocating rod 130 makes a reciprocating linear motion.

[0048] By adopting this structure, the connecting pin 120 transmits the power of the driving wheel 110 to the reciprocating rod 130, effectively converting the circular motion of the connecting pin 120 into the reciprocating linear motion of the reciprocating rod 130, enhancing the overall working efficiency and stability of the reciprocating assembly 100, so that the saw blade can remain stable during high-speed reciprocating motion. The hole wall of the second connecting hole 131 has two abutting surfaces arranged oppositely, and is located in front of and behind the connecting pin 120 respectively. During the operation of the reciprocating saw, the driving wheel 110 drives the connecting pin 120 to make a circular motion. When the connecting pin 120 rotates to abut against the front abutting surface, the reciprocating rod 130 moves forward. When the connecting pin 120 rotates to abut against the rear abutting surface, the reciprocating rod 130 moves backward, thus realizing the reciprocating motion of the reciprocating rod 130. Optionally, the second connecting hole 131 can be an oval hole, and the connecting pin 120 can be cylindrical. A saw blade is connected to one end of the reciprocating rod 130 away from the connecting pin 120, and the saw blade performs cutting operations along with the reciprocating linear motion of the reciprocating rod 130.

[0049] Further, a roller bearing 121 is sleeved on the connecting pin 120. The connecting pin 120 abuts against the pore wall of the second connecting hole 131 through the roller bearing 121, and the roller bearing 121 is in rolling contact with the pore wall of the second connecting hole 131.

[0050] It can be understood that the setting of the roller bearing 121 can effectively reduce the friction between the connecting pin 120 and the pore wall of the second connecting hole 131, thereby improving the movement smoothness of the reciprocating assembly 100. This design enables the reciprocating assembly 100 to still maintain a good movement state even under long-term high-intensity working conditions, without reducing its performance due to excessive wear. To achieve the best performance, preferably, the material selection of the roller bearing 121 should take into account both wear resistance and light weight to ensure its stable operation under high loads while reducing unnecessary energy consumption. Preferably, the roller bearing 121 can be a needle roller bearing. A needle roller bearing is a roller bearing 121 with cylindrical rollers. The rollers are thin and long relative to their diameter. Despite having a small cross-section, the needle roller bearing still has a high load-bearing capacity, a compact radial structure, and the smallest outer diameter when its inner diameter size and load capacity are the same as those of other types of bearings, which is particularly suitable for support structures where the radial installation size is limited.

[0051] Figure 3 Schematically shows a partial structural schematic diagram of a reciprocating saw according to an embodiment of the present invention. Figure 4 Schematically shows an exploded view of a partial structure of a reciprocating saw according to an embodiment of the present invention. Figure 5 Schematically shows a structural schematic diagram of the drive assembly 300 according to an embodiment of the present invention. Refer to Figures 3 to 5 In addition, the present technical solution also provides a reciprocating saw, which includes a mounting box 400, a limiting assembly 200, a drive assembly 300, and the reciprocating assembly 100 in the above embodiment. The limiting assembly 200, the drive assembly 300, and the reciprocating assembly 100 are all connected to the mounting box 400, and the drive assembly 300 is used to drive the transmission wheel 110 to rotate.

[0052] In the reciprocating saw of this technical solution, by integrating the limit component 200, the drive component 300 and the reciprocating component 100 into the installation box 400, the overall structure is compact, making the overall structure of the reciprocating saw small and light, convenient to carry and use. Optionally, the installation box 400 is made of high-strength materials to ensure stability and durability under complex working conditions. In addition, since the reciprocating saw adopts the reciprocating component 100 provided by the above technical solution, the balancing member 150 can effectively offset the unbalanced force generated by the movement of the reciprocating rod 130, thereby significantly reducing the vibration during the operation of the equipment, ensuring the cutting accuracy and improving the operation comfort at the same time. By arranging the reciprocating rod 130 and the balancing member 150 on both sides of the transmission wheel 110 respectively, the burden on the transmission shaft 140 is effectively dispersed, so that the reciprocating component 100 has a long service life, thereby improving the overall durability of the reciprocating saw.

[0053] Further, the reciprocating saw further includes a housing, and the installation box 400 is fixedly connected to the housing. Optionally, the installation box 400 can be fixedly connected to the housing by bolts. Optionally, the fixed end of the drive component 300 can be fixedly connected to the housing, so as to ensure the fixed position of the drive component 300.

[0054] Further, referring to Figure 3 and Figure 4 , the installation box 400 includes a first connection seat 410. The first connection seat 410 is provided with a through groove 411. The transmission shaft 140 passes through the through groove 411. A transmission bearing 170 is sleeved on the transmission shaft 140. The transmission shaft 140 is in transmission connection with the inner wall of the through groove 411 through the transmission bearing 170. The transmission wheel 110 is arranged in the through groove 411. The balancing member 150 is located at the bottom of the installation box 400. One end of the transmission shaft 140 away from the transmission wheel 110 passes through the through groove 411 and is in transmission connection with the balancing member 150.

[0055] By connecting the transmission shaft 140 with the inner wall of the through groove 411 through the transmission bearing 170, the running stability of the reciprocating component 100 is enhanced, the frictional loss between the transmission shaft 140 and the installation box 400 is reduced, and the power is ensured to be transmitted stably and efficiently. The inner ring of the bearing of the transmission bearing 170 is fixedly connected to the transmission shaft 140, and the outer ring of the bearing of the transmission bearing 170 is fixedly connected to the inner wall of the through groove 411. The transmission bearing 170 can be a ball bearing or a roller bearing 121. The ball bearing has the characteristics of low friction and high precision and is suitable for high-speed operation, while the roller bearing 121 is more suitable for bearing large radial loads. The specific selection of the transmission bearing 170 is determined according to the actual working conditions and load requirements.

[0056] Optionally, referring to Figure 4, the transmission bearings 170 include a first transmission bearing 171 and a second transmission bearing 172, and the first transmission bearing 171 and the second transmission bearing 172 are arranged at intervals along the axial direction of the transmission shaft 140. By arranging the first transmission bearing 171 and the second transmission bearing 172 at intervals, interference between the two during operation can be prevented. Optionally, the first transmission bearing 171 is located above the second transmission bearing 172, and the outer diameter of the first transmission bearing 171 is greater than the outer diameter of the second transmission bearing 172. Optionally, the outer diameter of the transmission wheel 110 is greater than the outer diameter of the first transmission bearing 171. By using a transmission wheel 110 with a larger outer diameter, the transmission wheel 110 can bear a larger load, and at the same time, the arrangement of the connecting pin 120 can be facilitated. Correspondingly, the through groove 411 on the first connecting seat 410 is a stepped groove. Exemplarily, the through groove 411 includes a first groove section, a second groove section, and a third groove section arranged in sequence from top to bottom and communicating with each other. The diameter of the first groove section is the largest, the diameter of the second groove section is the second largest, and the diameter of the third groove section is the smallest. The transmission wheel 110 is located in the first groove section, the first transmission bearing 171 is located in the second groove section, and the second transmission bearing 172 is located in the third groove section. Through the stepped groove design, each component is accurately positioned, the space utilization is optimized, the structural compactness is enhanced, and the overall mechanical performance is improved.

[0057] It can be understood that by providing two transmission bearings 170, the axial load can be effectively dispersed, the rigidity and load-bearing capacity of the entire reciprocating assembly 100 can be improved, the stable operation of the transmission shaft 140 can be further ensured, and the stability of the overall structure can be enhanced. In other embodiments, the number of transmission bearings 170 can also be one, three, etc., which can be specifically set according to the usage requirements.

[0058] Furthermore, a guide rod 412 is provided at the bottom of the first connecting seat 410, and a guide groove 151 is provided on the side of the balance member 150 facing the first connecting seat 410, and the guide rod 412 is located inside the guide groove 151.

[0059] The cooperation between the guide rod 412 and the guide groove 151 effectively restricts the movement trajectory of the balance member 150, ensures that the balance member 150 remains stable during movement, avoids deviation, and further improves the running accuracy and safety of the reciprocating saw. Understandably, both the guide rod 412 and the guide groove 151 extend along the axial direction of the reciprocating saw. Optionally, the number of guide rods 412 is two, and the two guide rods 412 are symmetrically arranged. Correspondingly, the number of guide grooves 151 is two, and the two guide grooves 151 are respectively located on both sides of the balance member 150. Of course, in other embodiments, the number of guide rods 412 can be one, three, etc., and its number and arrangement can be adjusted according to actual needs, and no specific limitation is made here. The number and arrangement of the guide grooves 151 are arranged in cooperation with the guide rods 412. Optionally, an extension portion 413 is provided at the bottom of the first connection seat 410. The front end of the guide rod 412 is connected to the extension portion 413, and the rear end is inserted into the connection hole on the first connection seat 410. The extension portion 413 provides a supporting force for the guide rod 412 to ensure that the balance member 150 does not shake during high-speed movement. Optionally, the guide rod 412 can be welded to the extension portion 413 or can be passed through the extension portion 413 and connected by fasteners to ensure firm and reliable connection.

[0060] Further, Figure 5 Schematically shows an exploded view of the limiting assembly 200 according to an embodiment of the present invention. Refer to Figures 3 to 5 , the installation box 400 further includes a second connection seat 420 connected to the first connection seat 410. The limiting assembly 200 includes a guide member 210, a support arm 220, and a baffle 230. The guide member 210 is connected to the bottom of the second connection seat 420. The guide member 210 is provided with a sliding groove 212a. One end of the support arm 220 is slidably disposed in the sliding groove 212a, and the other end of the support arm 220 is connected to the baffle 230. An avoidance opening is provided on the baffle 230, and the saw blade of the reciprocating saw extends out from the avoidance opening.

[0061] During the process of using a reciprocating saw, by adjusting the extended length of the support arm 220, the relative positions of the baffle 230 and the saw blade can be adjusted, thereby changing the cutting length of the saw blade, so that the reciprocating saw can meet different working requirements. Exemplarily, the guiding member 210 includes a bottom plate 211 and first side plates 212 located on both sides of the length direction of the bottom plate 211 (the length direction of the saw blade). The first side plates 212 are perpendicularly connected to the bottom plate 211, thereby forming a sliding groove 212a. It can be understood that the sliding groove 212a extends along the length direction of the saw blade. The support arm 220 includes a support plate 221 and two second side plates 222. The two second side plates 222 are respectively connected to both sides of the length direction of the support plate 221, and the support plate 221 and the bottom of the second connecting seat 420 are spaced apart. The support plate 221 is provided with a strip-shaped hole 221a extending along the length direction of the support plate 221 (the length direction of the saw blade). A through hole 211a is provided on the bottom plate 211 of the guiding member 210, and the strip-shaped hole 221a communicates with the through hole 211a. A plurality of card slots 222a are provided at intervals along the length direction of the second side plate 222. The limiting assembly 200 further includes a support pin 250 and an elastic member 240. The support pin 250 includes a support block 251 and a connecting rod 252. The support block 251 is located between the support plate 221 and the second connecting seat 420. The elastic member 240 is located between the second connecting seat 420 and the support plate 221, that is, the top of the elastic member 240 abuts against the second connecting seat 420, and the bottom of the elastic member 240 abuts against the support plate 221. Both ends of the support block 251 are used for being clamped in the card slots 222a on the second side plate 222. The connecting rod 252 sequentially passes through the strip-shaped hole 221a and the through hole 211a from top to bottom, and a button 260 is connected to the bottom. Optionally, a groove for positioning the elastic member 240 is provided on the top of the support block 251.

[0062] When it is necessary to adjust the extended length of the support arm 220, push the button 260 upward to press the support pin 250 against the elastic member 240. After the elastic member 240 contracts, the support block 251 leaves the card slot 222a and disengages from the support arm 220. At this time, the support arm 220 can be moved forward and backward. After moving into place (the support block 251 is aligned with another card slot 222a), release the button 260. The elastic member 240 presses the support pin 250 downward by its own restoring force, so that the support block 251 is inserted into the card slot 222a again, thereby fixing the position of the support arm 220.

[0063] Further, a guiding bearing 421 is connected to the top of the second connecting seat 420. The guiding rod 412 passes through the guiding bearing 421 and can perform a reciprocating linear motion along the axial direction of the guiding bearing 421.

[0064] The guiding bearing 421 guides the reciprocating rod 130 to ensure that the reciprocating rod 130 runs smoothly along the established trajectory. In this embodiment, a profiling groove is provided on the surface of the second connecting seat 420 facing the reciprocating rod 130, and the guiding bearing 421 is arranged inside the profiling groove. The profiling groove is a groove arranged according to the shape of the guiding bearing 421, so as to ensure the stable connection between the guiding bearing 421 and the second connecting seat 420, and further ensure the running stability of the reciprocating rod 130. Preferably, limiting protrusions 422 are respectively arranged on both sides of the second connecting seat 420. The guiding bearing 421 is located between the two limiting protrusions 422. Threaded holes are provided in the limiting protrusions 422. A fixing plate 423 is arranged on the top of the guiding bearing 421. Bolts are inserted through the fixing plate 423 and connected to the threaded holes in the limiting protrusions 422, so that the fixing plate 423 presses the guiding bearing 421. In other embodiments, threaded holes can also be provided in the guiding bearing 421, and bolts are used to pass through the limiting protrusions 422 and the threaded holes in the guiding bearing 421 for threaded connection. Of course, the guiding bearing 421 can also be welded to the second connecting seat 420. Optionally, the guiding bearing 421 can be a block structure, and the inner surface thereof for contacting the reciprocating rod 130 is lubricated to ensure the smoothness of the reciprocating rod 130 during movement.

[0065] Further, referring to Figure 3 and Figure 6 , the installation box 400 further includes a third connecting seat 430 connected to the first connecting seat 410. The third connecting seat 430 is provided with an avoidance hole 431. The axial direction of the avoidance hole 431 is perpendicular to the axial direction of the transmission wheel 110. The driving assembly 300 includes a driving motor 320, an output shaft and a driving wheel 310. The driving wheel 310 is connected to the driving motor 320 through the output shaft. The driving motor 320 is used to drive the output shaft to rotate. The driving wheel 310 passes through the avoidance hole 431 and is in transmission connection with the transmission wheel 110. A third transmission bearing 350 is sleeved on the output shaft, and the output shaft is in transmission connection with the third connecting seat 430 through the third transmission bearing 350.

[0066] By connecting the fixed end of the drive assembly 300 to the third connecting seat 430, seamless docking between the transmission wheel 110 and the drive assembly 300 is ensured, improving the transmission efficiency. Optionally, the drive assembly 300 includes a drive motor 320 and a drive wheel 310. The drive motor 320 drives the drive wheel 310 to rotate, and the drive wheel 310 is in transmission connection with the transmission wheel 110 and drives the transmission wheel 110 to rotate. The drive motor 320 precisely adjusts the rotational speed through a control circuit to ensure the stable operation of the reciprocating assembly 100. In this embodiment, the drive wheel 310 and the transmission wheel 110 are bevel gears. The design of the bevel gears effectively reduces noise and improves the transmission accuracy. In other embodiments, the drive assembly 300 can be arranged above the reciprocating assembly 100, and both the drive wheel 310 and the transmission wheel 110 are spur gears. The installation position of the drive assembly 300 can be adjusted according to actual needs to optimize the overall structural layout.

[0067] Optionally, a connecting piece 360 is also sleeved on the output shaft of the drive assembly 300. The inner ring of the bearing of the third transmission bearing 350 is fixedly connected to the output shaft, and the outer ring of the bearing of the third transmission bearing 350 is fixedly connected to the connecting piece 360. The connecting piece 360 is fixedly connected to the third connecting seat 430 through bolts. Thus, the connection between the drive assembly 300 and the third connecting seat 430 can be achieved, and at the same time, it can ensure that the output shaft of the drive assembly 300 can rotate stably. Optionally, the third transmission bearing 350 can be a ball bearing or a roller bearing, etc., which is specifically set according to the use needs and is not limited here. Optionally, in this embodiment, the connecting piece 360 is located behind the third transmission bearing 350. In other embodiments, the connecting piece 360 can also be sleeved on the outer circumference of the third transmission bearing 350. Of course, in some embodiments, the outer ring of the bearing of the third transmission bearing 350 can also be directly fixedly connected to the hole wall of the avoidance hole 431. Optionally, the third connecting seat 430 is fixedly connected to the housing of the reciprocating saw through bolts.

[0068] Optionally, a cage 330 is sleeved outside the drive motor 320. An airbag 340 is arranged between the cage 330 and the drive motor 320. The airbag 340 provides buffering during the operation of the drive motor 320, reduces vibration, extends the service life of the whole machine, and at the same time improves the user experience. The material of the cage 330 can be high-strength plastic, and the airbag 340 is made of high-temperature resistant rubber to ensure effective buffering can still be provided in a high-temperature environment. Optionally, the cage 330 is fixedly connected to the housing of the reciprocating saw to ensure that the drive motor 320 can be stably fixed inside the housing.

[0069] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A reciprocating assembly, characterized in that: include: Transmission wheel (110); A connecting pin (120) connected to one side of the transmission wheel (110); A reciprocating rod (130) is transmission-connected to the transmission wheel (110) via the connecting pin (120); A transmission shaft (140) connected to the transmission wheel (110) and extending toward a side away from the connection pin (120); A balancing member (150) is connected to the transmission wheel (110) via the transmission shaft (140); The transmission wheel (110) is configured to drive the reciprocating rod (130) to perform reciprocating linear motion, and at the same time, drive the balancing member (150) to perform reciprocating linear motion in the opposite direction to the motion direction of the reciprocating rod (130).

2. The reciprocating assembly according to claim 1, characterized in that An eccentric wheel (160) is connected to one end of the transmission shaft (140) away from the transmission wheel (110), and the balancing member (150) is provided with a first connecting hole. The eccentric wheel (160) is located inside the first connecting hole, and the outer periphery of the eccentric wheel (160) abuts against the hole wall of the first connecting hole. The rotation of the eccentric wheel (160) drives the balancing member (150) to perform reciprocating linear motion.

3. The reciprocating assembly according to claim 1, characterized in that The connecting pin (120) is eccentrically arranged relative to the transmission wheel (110); one end of the reciprocating rod (130) connected to the connecting pin (120) is provided with a second connecting hole (131); the outer periphery of the connecting pin (120) abuts against the hole wall of the second connecting hole (131); when the connecting pin (120) rotates around the rotation center of the transmission wheel (110), the reciprocating rod (130) performs reciprocating linear motion.

4. The reciprocating assembly according to claim 3, characterized in that A roller bearing (121) is sleeved on the connecting pin (120), and the connecting pin (120) abuts against the hole wall of the second connecting hole (131) through the roller bearing (121), and the roller bearing (121) and the hole wall of the second connecting hole (131) are in rolling contact.

5. A reciprocating saw, characterized in that: The reciprocating saw comprises: Limiting assembly (200); A drive assembly (300); Installation box (400); and The reciprocating assembly (100) according to any one of claims 1 to 4, the limiting assembly (200), the driving assembly (300) and the reciprocating assembly (100) are all connected to the mounting box (400), and the driving assembly (300) is used to drive the transmission wheel (110) to rotate.

6. The reciprocating saw according to claim 5, characterized in that The installation box (400) comprises a first connecting seat (410), the first connecting seat (410) is provided with a through slot (411), the transmission shaft (140) is inserted into the through slot (411), a transmission bearing (170) is sleeved on the transmission shaft (140), the transmission shaft (140) is transmission-connected to the inner wall of the through slot (411) through the transmission bearing (170), the transmission wheel (110) is arranged in the through slot (411), the balance member (150) is located at the bottom of the installation box (400), and one end of the transmission shaft (140) away from the transmission wheel (110) passes through the through slot (411) and is transmission-connected to the balance member (150).

7. The reciprocating saw according to claim 6, characterized in that A guide rod (412) is provided at the bottom of the first connecting seat (410), a guide groove (151) is provided on one side of the balancing member (150) facing the first connecting seat (410), and the guide rod (412) is located inside the guide groove (151).

8. The reciprocating saw according to claim 7, characterized in that The installation box (400) also includes a second connecting seat (420) connected to the first connecting seat (410), and the limiting assembly (200) includes a guide member (210), a support arm (220) and a baffle (230), wherein the guide member (210) is connected to the bottom of the second connecting seat (420), and the guide member (210) is provided with a slide groove (212a), one end of the support arm (220) can be slidably arranged in the slide groove (212a), and the other end of the support arm (220) is connected to the baffle (230), and the baffle (230) is provided with an avoidance opening, and the saw blade of the reciprocating saw extends out from the avoidance opening.

9. The reciprocating saw according to claim 8, characterized in that The top of the second connecting seat (420) is connected to a guide bearing (421), and the guide rod (412) is inserted into the guide bearing (421) and is capable of reciprocating linear motion along the axial direction of the guide bearing (421).

10. The reciprocating saw according to claim 6, characterized in that The installation box (400) further comprises a third connection seat (430) connected to the first connection seat (410); the third connection seat (430) is provided with a avoidance hole (431); the axial direction of the avoidance hole (431) is perpendicular to the axial direction of the transmission wheel (110); the driving assembly (300) comprises a driving motor (320), an output shaft and a driving wheel (310); the driving wheel (310) is connected to the driving motor (320) via the output shaft; the driving motor (320) is used to drive the output shaft to rotate; the driving wheel (310) passes through the avoidance hole (431) and is transmission-connected to the transmission wheel (110); the output shaft sleeve is provided with a third transmission bearing (350); the output shaft is transmission-connected to the third connection seat (430) via the third transmission bearing (350).

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