Reciprocating assembly and reciprocating saw

Abstract

The utility model belongs to the technical field of electric tools, and particularly relates to a reciprocating assembly and a reciprocating saw. The reciprocating assembly comprises a transmission wheel, a connecting pin, a reciprocating rod, a transmission shaft and a balance piece. 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] This utility model belongs to the field of power tool technology, specifically relating to a reciprocating component and a reciprocating saw. Background Technology

[0002] A reciprocating saw is a handheld power tool that performs sawing work through the reciprocating motion of a saw blade. During operation, the tool head of a reciprocating saw undergoes periodic reciprocating motion, which generates an unbalanced force. This unbalanced force is the main factor causing vibration in the reciprocating saw, whether under no-load or during sawing. To effectively reduce vibration caused by this unbalanced force and improve the stability and sawing accuracy of the reciprocating saw, a counterweight is usually added to the drive gear. The centrifugal force generated by the counterweight balances the movement of the tool head.

[0003] In existing technical solutions, the counterweight and reciprocating rod are often designed to be mounted on the same side of the drive wheel. While this design can achieve balance to some extent, it also introduces new problems. Because the forces of the counterweight, reciprocating rod, and drive gear are concentrated on the gear shaft, the gear bearings are subjected to a significant load. Prolonged high-load operation may lead to damage to the gear shaft, which not only affects the service life of the reciprocating saw but also adversely impacts the overall durability of the machine. Utility Model Content

[0004] The purpose of this invention is to solve the problem of how to reduce the load on the drive shaft, thereby improving the overall lifespan of the machine. This objective is achieved through the following technical solution:

[0005] The first aspect of this utility model provides a reciprocating assembly, comprising:

[0006] Drive wheel;

[0007] A connecting pin is attached to one side of the drive wheel;

[0008] The reciprocating rod is connected to the transmission wheel via the connecting pin;

[0009] A drive shaft is connected to the drive wheel and extends toward the side opposite to the connecting pin;

[0010] The balancing component is connected to the transmission wheel via 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 balancer to perform reciprocating linear motion in the opposite direction to the reciprocating rod.

[0012] In this technical solution, the reciprocating assembly has a reciprocating rod and a balancer respectively positioned on opposite sides of the transmission wheel. The reciprocating rod is connected to the transmission wheel via a connecting pin, and the balancer is connected to the transmission wheel via a transmission shaft. Since the balancer and the reciprocating rod perform reciprocating linear motions in opposite directions, the balancer can counteract the unbalanced force generated by the reciprocating rod's motion. This design of the reciprocating assembly results in a compact structure and simple assembly process. Furthermore, the transmission shaft is only subjected to the forces of the transmission wheel and the balancer, reducing the load on the transmission shaft compared to existing structures, thus enhancing the overall structural durability.

[0013] In addition, the reciprocating component of this utility model may also have the following additional technical features:

[0014] An eccentric wheel is connected to the end of the drive shaft away from the drive wheel. The balancer is provided with a first connecting hole. The eccentric wheel is located inside the first connecting hole. The outer circumference of the eccentric wheel abuts against the hole wall of the first connecting hole. The rotation of the eccentric wheel drives the balancer to perform reciprocating linear motion.

[0015] In some embodiments of this utility model, the connecting pin is eccentrically arranged relative to the transmission wheel, and a second connecting hole is provided at the end where the reciprocating rod and the connecting pin are connected. The outer periphery of the connecting pin abuts against the wall of the second connecting hole. When the connecting pin rotates around the rotation center of the transmission wheel, the reciprocating rod performs reciprocating linear motion.

[0016] In some embodiments of this utility model, a roller bearing is sleeved on the connecting pin, and the connecting pin abuts against the wall of the second connecting hole through the roller bearing, and the roller bearing and the wall of the second connecting hole make rolling contact.

[0017] A second aspect of this utility model provides a reciprocating saw comprising:

[0018] Installation box;

[0019] Limiting components;

[0020] Driver components; and

[0021] In the reciprocating assembly described above, the limiting assembly, the driving assembly, and the reciprocating assembly are all connected to the mounting box, and the driving assembly is used to drive the transmission wheel to rotate.

[0022] In some embodiments of this utility model, the mounting box includes a first connecting seat, the first connecting seat is provided with a through groove, the drive shaft passes through the through groove, a drive bearing is sleeved on the drive shaft, the drive shaft is connected to the inner wall of the through groove through the drive bearing, the drive wheel is disposed in the through groove, the balance member is located at the bottom of the mounting box, and the end of the drive shaft away from the drive wheel passes through the through groove and is connected to the balance member.

[0023] In some embodiments of this utility model, a guide rod is provided at the bottom of the first connecting seat, and a guide groove is provided on the side of the balancing member facing the first connecting seat, with the guide rod located inside the guide groove.

[0024] In some embodiments of this utility model, the mounting box further includes a second connecting seat connected to the first connecting seat. The limiting component includes a guide, a support arm, and a baffle. The guide is connected to the bottom of the second connecting seat and is provided with a sliding groove. One end of the support arm is slidably disposed in the sliding groove, and the other end of the support arm is connected to the baffle. The baffle is provided with an avoidance opening, and the saw blade of the reciprocating saw extends out from the avoidance opening.

[0025] In some embodiments of this utility model, a guide bearing is connected to the top of the second connecting seat, and the guide rod passes through the guide bearing and can reciprocate linearly along the axial direction of the guide bearing.

[0026] In some embodiments of this utility model, the mounting box further includes a third connecting seat connected to the first connecting seat. The third connecting seat is provided with a clearance hole, the axial direction of which is perpendicular to the axial direction of the transmission wheel. The drive assembly includes a drive motor, an output shaft, and a drive wheel. The drive wheel is connected to the drive motor through the output shaft. The drive motor is used to drive the output shaft to rotate. The drive wheel passes through the clearance hole and is connected to the transmission wheel. The output shaft is fitted with a third transmission bearing, and the output shaft is connected to the third connecting seat through the third transmission bearing. Attached Figure Description

[0027] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0028] Figure 1 A schematic diagram of the reciprocating assembly according to an embodiment of the present invention is shown.

[0029] Figure 2 An exploded view schematically illustrates a reciprocating assembly according to an embodiment of the present invention;

[0030] Figure 3 A partial structural diagram of a reciprocating saw according to an embodiment of the present invention is shown schematically.

[0031] Figure 4 An exploded view of a partial structure of a reciprocating saw according to an embodiment of the present invention is shown schematically.

[0032] Figure 5 An exploded view schematically showing the limiting component according to an embodiment of the present invention;

[0033] Figure 6 A schematic diagram of the structure of a drive assembly according to an embodiment of the present invention is shown.

[0034] The labels in the attached diagram are as follows:

[0035] 100. Reciprocating assembly; 110. Drive wheel; 120. Connecting pin; 121. Roller bearing; 130. Reciprocating rod; 131. Second connecting hole; 140. Drive shaft; 150. Balancing component; 151. Guide groove; 160. Eccentric wheel; 170. Drive bearing; 171. First drive bearing; 172. Second drive bearing;

[0036] 200, Limiting component; 210, Guide component; 211, Base plate; 211a, Through hole; 212, First side plate; 212a, Slide groove; 220, Support arm; 221, Support plate; 221a, Strip hole; 222, Second side plate; 222a, Slot; 230, Baffle; 240, Elastic component; 250, Support pin; 251, Support block; 252, Connecting rod; 260, Button;

[0037] 300. Drive assembly; 310. Drive wheel; 320. Drive motor; 330. Cage; 340. Airbag; 350. Third transmission bearing; 360. Connector;

[0038] 400. Mounting box; 410. First connecting seat; 411. Through groove; 412. Guide rod; 413. Extension; 420. Second connecting seat; 421. Guide bearing; 422. Limiting protrusion; 423. Fixing piece; 430. Third connecting seat; 431. Clearance hole. Detailed Implementation

[0039] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0040] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude 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 construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0041] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0042] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations.

[0043] Figure 1A schematic diagram of the reciprocating assembly 100 according to an embodiment of the present invention is shown. Figure 2 An exploded view schematically illustrates a reciprocating assembly 100 according to an embodiment of the present invention. For example... Figure 1 and Figure 2 As shown, this utility model proposes a reciprocating assembly 100, including a transmission wheel 110, a connecting pin 120, a reciprocating rod 130, a transmission shaft 140, and a balancer 150; the connecting pin 120 is connected to one side of the transmission wheel 110; the reciprocating rod 130 is connected to the transmission wheel 110 via the connecting pin 120; the transmission shaft 140 is connected to the transmission wheel 110 and extends toward the side opposite to the connecting pin 120; the balancer 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 simultaneously drive the balancer 150 to perform reciprocating linear motion in the opposite direction to the reciprocating rod 130.

[0044] In this technical solution, the reciprocating assembly 100 has a reciprocating rod 130 and a balancer 150 respectively positioned on both sides of the transmission wheel 110. The reciprocating rod 130 is connected to the transmission wheel 110 via a connecting pin 120, and the balancer 150 is connected to the transmission wheel 110 via a transmission shaft 140. Since the balancer 150 and the reciprocating rod 130 perform reciprocating linear motions in opposite directions, the balancer 150 can counteract the unbalanced force generated by the movement of the reciprocating rod 130. This design of the reciprocating assembly 100 results in a compact structure and a simple assembly process. Furthermore, the transmission shaft 140 is only subjected to the forces of the transmission wheel 110 and the balancer 150. Compared to the structure in the prior art, the load on the transmission shaft 140 is reduced, thus enhancing the overall durability of the structure.

[0045] Furthermore, an eccentric wheel 160 is connected to the end of the drive shaft 140 away from the drive wheel 110. The balance member 150 is provided with a first connecting hole. The eccentric wheel 160 is located inside the first connecting hole. 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 balance member 150 to perform reciprocating linear motion.

[0046] By adopting this structure, the eccentric wheel 160 transmits the power from the drive shaft 140 to the balancing member 150, effectively realizing the conversion and transmission of power and enhancing the overall working efficiency and stability of the reciprocating assembly 100. The wall of the first connecting hole has two opposing abutment surfaces, located in front of and behind the eccentric wheel 160, respectively. During the operation of the reciprocating saw, the drive wheel 110 drives the drive shaft 140 to rotate, which in turn drives the eccentric wheel 160 to rotate. When the eccentric wheel 160 rotates to abut the front abutment surface, the balancing member 150 moves forward; when the eccentric wheel 160 rotates to abut the rear abutment surface, the balancing member 150 moves backward, thus realizing the reciprocating motion of the balancing member 150. Optionally, the first connecting hole can be an oblong hole, and the eccentric wheel 160 can be cylindrical. Understandably, the structure of the balancer 150 and the reciprocating rod 130 are designed to coordinate the center of gravity of the balancer 150 with the motion trajectory of the reciprocating rod 130, ensuring that the balancer 150 can effectively counteract vibrations and improve overall operational stability during high-speed operation. Optionally, the eccentric wheel 160 is provided with multiple weight-reducing holes. The weight-reducing holes help reduce the overall mass of the eccentric wheel 160, further improving the response speed and dynamic balance performance of the reciprocating assembly 100, enabling the reciprocating assembly 100 to maintain a stable and efficient operating state even under high-intensity work.

[0047] See also Figure 1 and Figure 2 The connecting pin 120 is eccentrically positioned relative to the transmission wheel 110. The reciprocating rod 130 and the connecting pin 120 are connected at one end with a second connecting hole 131. The outer periphery of the connecting pin 120 and the hole wall of the second connecting hole 131 abut against each other. When the connecting pin 120 rotates around the rotation center of the transmission wheel 110, the reciprocating rod 130 performs reciprocating linear motion.

[0048] By adopting this structure, the connecting pin 120 transmits the power of the transmission 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. This enhances the overall working efficiency and stability of the reciprocating assembly 100, allowing the saw blade to remain stable during high-speed reciprocating motion. The second connecting hole 131 has two opposing abutment surfaces, located in front of and behind the connecting pin 120, respectively. During the operation of the reciprocating saw, the transmission wheel 110 drives the connecting pin 120 in a circular motion. When the connecting pin 120 rotates to abut against the front abutment surface, the reciprocating rod 130 moves forward; when the connecting pin 120 rotates to abut against the rear abutment 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 oblong hole, and the connecting pin 120 can be cylindrical. A saw blade is connected to the end of the reciprocating rod 130 away from the connecting pin 120. The saw blade performs cutting operations by reciprocating linearly with the reciprocating rod 130.

[0049] Furthermore, a roller bearing 121 is sleeved on the connecting pin 120, and the connecting pin 120 abuts against the wall of the second connecting hole 131 through the roller bearing 121 and the wall of the second connecting hole 131 makes rolling contact.

[0050] Understandably, the arrangement of the roller bearing 121 effectively reduces friction between the connecting pin 120 and the bore wall of the second connecting hole 131, thereby improving the smoothness of movement of the reciprocating assembly 100. This design ensures that the reciprocating assembly 100 maintains good motion even under prolonged high-intensity working conditions, without performance degradation due to excessive wear. For optimal performance, preferably, the material selection for the roller bearing 121 should balance wear resistance and lightweight design, ensuring stable operation under high loads while minimizing unnecessary energy consumption. Preferably, the roller bearing 121 can be a needle roller bearing, which is a roller bearing 121 with cylindrical rollers that are both thin and long relative to its diameter. Despite its smaller cross-section, needle roller bearings still have high load-bearing capacity, a compact radial structure, and the smallest outer diameter when the inner diameter and load capacity are the same as other types of bearings, making them particularly suitable for support structures with limited radial installation dimensions.

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

[0052] The reciprocating saw in this technical solution integrates the limiting component 200, drive component 300, and reciprocating component 100 into a mounting box 400, resulting in a compact overall structure that makes the reciprocating saw small, lightweight, and easy to carry and use. Optionally, the mounting box 400 is made of high-strength materials to ensure stability and durability under complex working conditions. Furthermore, because the reciprocating saw uses the reciprocating component 100 provided in the above technical solution, the balancer 150 can effectively counteract the unbalanced force generated by the movement of the reciprocating rod 130, thereby significantly reducing vibration during operation, ensuring cutting accuracy while improving operating comfort. By placing the reciprocating rod 130 and the balancer 150 on opposite sides of the transmission wheel 110, the load on the transmission shaft 140 is effectively distributed, giving the reciprocating component 100 a longer service life, thus improving the overall durability of the reciprocating saw.

[0053] Furthermore, the reciprocating saw also includes a housing, a mounting box 400, and a fixed connection between the mounting box 400 and the housing. Optionally, the mounting box 400 can be fixedly connected to the housing using bolts. Optionally, the fixed end of the drive assembly 300 can be fixedly connected to the housing, thereby ensuring that the position of the drive assembly 300 is fixed.

[0054] Further, see Figure 3 and Figure 4 The mounting box 400 includes a first connecting seat 410, which is provided with a through groove 411. A drive shaft 140 passes through the through groove 411, and a drive bearing 170 is sleeved on the drive shaft 140. The drive shaft 140 is connected to the inner wall of the through groove 411 through the drive bearing 170. A drive wheel 110 is provided in the through groove 411. A balance member 150 is located at the bottom of the mounting box 400. The end of the drive shaft 140 away from the drive wheel 110 passes through the through groove 411 and is connected to the balance member 150.

[0055] The drive shaft 140 is connected to the inner wall of the through groove 411 via the drive bearing 170, enhancing the operational stability of the reciprocating assembly 100, reducing frictional losses between the drive shaft 140 and the mounting box 400, and ensuring stable and efficient power transmission. The inner ring of the drive bearing 170 is fixedly connected to the drive shaft 140, and the outer ring of the drive bearing 170 is fixedly connected to the inner wall of the through groove 411. The drive bearing 170 can be a ball bearing or a roller bearing 121. Ball bearings are characterized by low friction and high precision, making them suitable for high-speed operation, while roller bearings 121 are more suitable for bearing larger radial loads. The specific selection of the drive bearing 170 depends on the actual working conditions and load requirements.

[0056] Optionally, see Figure 4The transmission bearing 170 includes a first transmission bearing 171 and a second transmission bearing 172, which are spaced apart along the axial direction of the transmission shaft 140. By spaced apart, interference between the first and second transmission bearings 171 and 172 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 larger than the outer diameter of the second transmission bearing 172. Optionally, the outer diameter of the transmission wheel 110 is larger 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 withstand a larger load, and 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. For example, the through groove 411 includes a first groove segment, a second groove segment, and a third groove segment arranged sequentially from top to bottom and connected to each other. The diameter of the first groove segment is the largest, the diameter of the second groove segment is the second largest, and the diameter of the third groove segment is the smallest. The transmission wheel 110 is located in the first groove segment, the first transmission bearing 171 is located in the second groove segment, and the second transmission bearing 172 is located in the third groove segment. Through the stepped groove design, each component is precisely positioned, space utilization is optimized, structural compactness is enhanced, and overall mechanical performance is improved.

[0057] Understandably, by setting two transmission bearings 170, the axial load can be effectively distributed, the overall rigidity and load-bearing capacity of the 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 or three, etc., depending on the specific needs of use.

[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, with the guide rod 412 located inside the guide groove 151.

[0059] The cooperation between the guide rod 412 and the guide groove 151 effectively constrains the movement trajectory of the balancer 150, ensuring that the balancer 150 remains stable during movement and avoids deviation, further improving the operating 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, there are two guide rods 412, symmetrically arranged. Correspondingly, there are two guide grooves 151, located on both sides of the balancer 150. Of course, in other embodiments, the number of guide rods 412 can be one or three, etc., and their number and arrangement can be adjusted according to actual needs, without specific limitations here. The number and arrangement of the guide grooves 151 are configured in conjunction with the guide rods 412. Optionally, an extension 413 is provided at the bottom of the first connecting seat 410, the front end of the guide rod 412 is connected to the extension 413, and the rear end is inserted into the connecting hole on the first connecting seat 410. The extension 413 provides support for the guide rod 412, ensuring that the balancer 150 does not wobble during high-speed movement. Optionally, the guide rod 412 can be welded to the extension 413, or it can be inserted through the extension 413 and connected by fasteners to ensure a firm and reliable connection.

[0060] Furthermore, Figure 5 An exploded view schematically illustrating the limiting component 200 according to an embodiment of the present invention is shown. See also Figures 3 to 5 The mounting box 400 also includes a second connecting seat 420 connected to the first connecting seat 410. The limiting component 200 includes a guide 210, a support arm 220 and a baffle 230. The guide 210 is connected to the bottom of the second connecting seat 420 and is provided with a groove 212a. One end of the support arm 220 is slidably disposed in the groove 212a and the other end of the support arm 220 is connected to the baffle 230. The baffle 230 is provided with an avoidance opening, from which the saw blade of the reciprocating saw extends.

[0061] During the use of the reciprocating saw, the relative position of the baffle 230 and the saw blade can be adjusted by adjusting the extension length of the support arm 220, thereby changing the cutting length of the saw blade and enabling the reciprocating saw to meet different working needs. For example, the guide member 210 includes a base plate 211 and first side plates 212 located on both sides of the base plate 211 along its length direction (the length direction of the saw blade). The first side plates 212 and the base plate 211 are perpendicularly connected, forming a groove 212a. Understandably, the 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, which are respectively connected to both sides of the support plate 221 along its length direction, and the support plate 221 and the bottom of the second connecting seat 420 are spaced apart. The support plate 221 has a strip-shaped hole 221a extending along the length direction of the support plate 221 (the length direction of the saw blade). The bottom plate 211 of the guide member 210 has a through hole 211a, and the strip-shaped hole 221a and the through hole 211a are connected. The second side plate 222 has a plurality of slots 222a spaced apart along its length. The limiting assembly 200 also 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. The two ends of the support block 251 are engaged with the slots 222a on the second side plate 222. The connecting rod 252 passes through the strip hole 221a and the through hole 211a from top to bottom, and is connected to the button 260 at the bottom. Optionally, the top of the support block 251 is provided with a groove for positioning the elastic member 240.

[0062] When it is necessary to adjust the extension length of the support arm 220, push the button 260 upward to make the support pin 250 press the elastic member 240. After the elastic member 240 retracts, the support block 251 leaves the slot 222a and disengages from the support arm 220. At this time, the support arm 220 can be moved forward and backward. After it is moved into place (the support block 251 and the other slot 222a are aligned), release the button 260. The elastic member 240 presses down the support pin 250 with its own restoring force, so that the support block 251 is re-entered into the slot 222a, thereby fixing the position of the support arm 220.

[0063] Furthermore, a guide bearing 421 is connected to the top of the second connecting seat 420, and a guide rod 412 passes through the guide bearing 421 and can reciprocate linearly along the axial direction of the guide bearing 421.

[0064] The guide bearing 421 guides the reciprocating rod 130, ensuring its smooth operation along a predetermined trajectory. In this embodiment, the second connecting seat 420 has a contour groove on its side facing the reciprocating rod 130, and the guide bearing 421 is disposed inside the contour groove. The contour groove is a groove designed to fit the shape of the guide bearing 421, thereby ensuring a stable connection between the guide bearing 421 and the second connecting seat 420, thus guaranteeing the operational stability of the reciprocating rod 130. Preferably, the second connecting seat 420 has limiting protrusions 422 on both sides, and the guide bearing 421 is located between the two limiting protrusions 422. The limiting protrusions 422 have threaded holes, and the top of the guide bearing 421 has a fixing plate 423. A bolt passes through the fixing plate 423, and the bolt connects to the threaded hole on the limiting protrusion 422, thereby pressing the fixing plate 423 against the guide bearing 421. In other embodiments, threaded holes can be formed in the guide bearing 421, and bolts can be threaded through the limiting protrusion 422 and the threaded holes in the guide bearing 421 for connection. Of course, the guide bearing 421 can also be welded to the second connecting seat 420. Optionally, the guide bearing 421 can be a block structure, and its inner surface for contacting the reciprocating rod 130 is lubricated to ensure the smooth movement of the reciprocating rod 130.

[0065] Further, see Figure 3 and Figure 6 The mounting box 400 also includes a third connecting seat 430 connected to the first connecting seat 410. The third connecting seat 430 is provided with a clearance hole 431. The axial direction of the clearance hole 431 is perpendicular to the axial direction of the transmission wheel 110. The drive assembly 300 includes a drive motor 320, an output shaft, and a drive wheel 310. The drive wheel 310 is connected to the drive motor 320 through the output shaft. The drive motor 320 is used to drive the output shaft to rotate. The drive wheel 310 passes through the clearance hole 431 and is connected to the transmission wheel 110 for transmission. The output shaft is fitted with a third transmission bearing 350. The output shaft is connected to the third connecting seat 430 for transmission 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 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 and the transmission wheel 110 are connected and drive the transmission wheel 110 to rotate. The drive motor 320 precisely adjusts its speed through a control circuit to ensure smooth operation of the reciprocating assembly 100. In this embodiment, the drive wheel 310 and the transmission wheel 110 are bevel gears. The bevel gear design effectively reduces noise and improves transmission accuracy. In other embodiments, the drive assembly 300 can be positioned 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, the output shaft of the drive assembly 300 is further fitted with a connector 360. The inner ring of the third transmission bearing 350 is fixedly connected to the output shaft, and the outer ring of the third transmission bearing 350 is fixedly connected to the connector 360. The connector 360 is fixedly connected to the third connecting seat 430 by bolts. This allows for the connection between the drive assembly 300 and the third connecting seat 430 while ensuring stable rotation of the output shaft of the drive assembly 300. Optionally, the third transmission bearing 350 can be a ball bearing or a roller bearing, etc., depending on the application requirements, and is not limited here. Optionally, in this embodiment, the connector 360 is located behind the third transmission bearing 350. In other embodiments, the connector 360 can also be fitted onto the outer circumference of the third transmission bearing 350. Of course, in some embodiments, the outer ring of the third transmission bearing 350 can also be directly fixedly connected to the wall of the clearance hole 431. Optionally, the third connecting seat 430 is fixedly connected to the housing of the reciprocating saw by bolts.

[0068] Optionally, the drive motor 320 is fitted with a retainer 330, and an airbag 340 is disposed between the retainer 330 and the drive motor 320. The airbag 340 provides cushioning during the operation of the drive motor 320, reducing vibration, extending the service life of the entire machine, and improving the user experience. The retainer 330 can be made of high-strength plastic, and the airbag 340 is made of high-temperature resistant rubber to ensure effective cushioning even in high-temperature environments. Optionally, the retainer 330 is fixedly connected to the housing of the reciprocating saw, ensuring that the drive motor 320 can be stably fixed inside the housing.

[0069] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A reciprocating assembly characterized by, The reciprocating saw comprises: a transmission wheel (110); a connecting pin (120) connected to one side of the transmission wheel (110); a reciprocating rod (130) drivingly connected to the transmission wheel (110) through the connecting pin (120); a transmission shaft (140) connected to the transmission wheel (110) and extending towards the side away from the connecting pin (120); a balancing piece (150) drivingly connected to the transmission wheel (110) through the transmission shaft (140); the transmission wheel (110) is configured to drive the reciprocating rod (130) to make reciprocating linear motion, and at the same time, drive the balancing piece (150) to make reciprocating linear motion in the opposite direction of the reciprocating rod (130).

2. The reciprocating assembly of claim 1, wherein, The transmission shaft (140) is connected with an eccentric wheel (160) at the end away from the transmission wheel (110), the balancing piece (150) is provided with a first connecting hole, the eccentric wheel (160) is located inside the first connecting hole, the outer periphery of the eccentric wheel (160) and the hole wall of the first connecting hole are in abutment, and the eccentric wheel (160) rotates to drive the balancing piece (150) to make reciprocating linear motion.

3. The reciprocating assembly of claim 1, wherein, The connecting pin (120) is eccentrically arranged relative to the transmission wheel (110), one end of the reciprocating rod (130) connected with the connecting pin (120) is provided with a second connecting hole (131), the outer periphery of the connecting pin (120) and the hole wall of the second connecting hole (131) are in abutment, and when the connecting pin (120) rotates around the center of rotation of the transmission wheel (110), the reciprocating rod (130) makes reciprocating linear motion.

4. The reciprocating assembly of claim 3, wherein, A roller bearing (121) is arranged on the connecting pin (120), the connecting pin (120) is in abutment with 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 by, The reciprocating saw comprises: a limiting assembly (200); a driving assembly (300); a mounting box (400); and The reciprocating assembly (100) of any one of claims 1-4, 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 of claim 5, wherein, The mounting box (400) comprises a first connecting seat (410) provided with a through slot (411), the transmission shaft (140) passes through the through slot (411), a transmission bearing (170) is arranged on the transmission shaft (140), the transmission shaft (140) is drivingly connected with 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 balancing piece (150) is located at the bottom of the mounting box (400), and the end of the transmission shaft (140) away from the transmission wheel (110) passes out of the through slot (411) and is drivingly connected with the balancing piece (150).

7. The saw of claim 6, wherein, The bottom of the first connecting base (410) is provided with a guide rod (412), and one side of the balancing piece (150) is provided with a guide groove (151) facing the first connecting base (410), and the guide rod (412) is located inside the guide groove (151).

8. The saw of claim 7, wherein, The mounting box (400) further comprises a second connecting base (420) connected with the first connecting base (410), and the limiting assembly (200) comprises a guide piece (210), a supporting arm (220) and a baffle (230), the guide piece (210) is connected to the bottom of the second connecting base (420), the guide piece (210) is provided with a sliding groove (212a), one end of the supporting arm (220) is slidably arranged in the sliding groove (212a), the other end of the supporting arm (220) is connected with the baffle (230), and the baffle (230) is provided with an avoiding opening, and the saw blade of the reciprocating saw extends from the avoiding opening.

9. The reciprocating saw of claim 8, wherein, The top of the second connecting base (420) is connected with a guide bearing (421), the guide rod (412) penetrates through the guide bearing (421) and can make reciprocating linear motion along the axial direction of the guide bearing (421).

10. The reciprocating saw of claim 6, wherein, The mounting box (400) further comprises a third connecting base (430) connected with the first connecting base (410), the third connecting base (430) is provided with an avoiding hole (431), the axial direction of the avoiding 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 with the driving motor (320) through the output shaft, the driving motor (320) is used for driving the output shaft to rotate, the driving wheel (310) penetrates through the avoiding hole (431) and is drivingly connected with the transmission wheel (110), and the output shaft is sleeved with a third transmission bearing (350), and the output shaft is drivingly connected with the third connecting base (430) through the third transmission bearing (350). The mounting box (400) further comprises a third connecting base (430) connected with the first connecting base (410), the third connecting base (430) is provided with an avoiding hole (431), the axial direction of the avoiding 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 with the driving motor (320) through the output shaft, the driving motor (320) is used for driving the output shaft to rotate, the driving wheel (310) penetrates through the avoiding hole (431) and is drivingly connected with the transmission wheel (110), and the output shaft is sleeved with a third transmission bearing (350), and the output shaft is drivingly connected with the third connecting base (430) through the third transmission bearing (350).

Images