Flexible connection structure and portable multifunctional saw

Abstract

The utility model relates to the field of electric tools, in particular to a flexible connecting structure and a portable multifunctional saw, and the flexible connecting structure comprises a vibration source shell, a handle shell and an elastic damper. The vibration source shell is provided with a first matching part and comprises a boss with a flange and a first groove, a first outer edge end face facing the handle shell and a protruding part, the handle shell is connected with the vibration source shell through a second matching part, and the second matching part is provided with a second groove, a second outer edge end face opposite to the first outer edge end face and an avoiding opening. And the elastic damper is clamped between the first matching part and the second matching part and occupies the first groove and the second groove, so that the vibration source shell is firmly connected with the handle shell. A first inclined plane is formed at the joint of the first outer edge end face and the protruding part, a second inclined plane is formed at the joint of the second outer edge end face and the receding opening, and the first inclined plane and the second inclined plane are matched with the elastic damper to enhance the connection strength.

Description

Technical Field

[0001] The present application relates to the field of electric tools, and in particular to a flexible connection structure and a portable multifunctional saw. Background Art

[0002] Many high-speed portable power tools, such as electric saws, grinders, and drills, operate at high speeds—for example, 20,000 revolutions per minute (rpm) or higher—and their electric motors' long rotor and output shafts can easily cause resonance and vibration in the handles. This vibration not only affects the tool's operating accuracy but can also be harmful to the user's health. Conventional dampers often use simple springs or rubber pads, but these materials are susceptible to aging or damage under prolonged, high-load operation, and the housings can also be easily damaged during use. Utility Model Content

[0003] The purpose of at least one specific embodiment of the present utility model is to solve the defects of the prior art and provide a flexible connection structure and a portable multifunctional saw.

[0004] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0005] A flexible connection structure, comprising:

[0006] Vibration source housing and handle housing;

[0007] an elastic damper, which is sandwiched between the vibration source housing and the handle housing;

[0008] The vibration source housing and the handle housing respectively have a first matching portion and a second matching portion that abut against the elastic damper;

[0009] Furthermore, the first mating portion includes a first outer edge end surface that abuts against the elastic damper, the first outer edge end surface includes a first surface, a second surface, and a first transition surface connecting the first surface and the second surface, the second surface protruding from the first surface and enclosing with the first transition surface to form a protrusion integrally formed with the vibration source housing;

[0010] Furthermore, when viewed from the main viewing direction of the protruding portion, the second outer edge end surface of the second matching portion that abuts against the elastic damper at least partially covers the protruding portion compared to the projection of the horizontal bottom surface.

[0011] Furthermore, the first matching portion includes a boss extending and protruding from the longitudinal axis, the boss includes a flange and a first groove located between the flange and the first outer edge end face, and the protrusion extends radially toward the bottom of the first groove and is integrally connected thereto.

[0012] Furthermore, the boss includes a first half boss and a second half boss connected to each other, and a connecting column structure protruding from the inner walls of the two is formed on the inner side of the connection between the two. The connecting column structure is provided with a connecting hole, and the two are connected by a connecting piece passing through the connecting hole.

[0013] Furthermore, a connecting hole is provided at the bottom of the first groove, and the elastic damper can cover the connecting hole.

[0014] Furthermore, the elastic damper includes a first portion, a second portion, and a clamping groove located between the first portion and the second portion.

[0015] Furthermore, the first part is nested in the first groove and fits with the surface of the first outer edge end face and the transition face, and the second part is sleeved on the outer periphery of the flange to cover and surround the flange.

[0016] Furthermore, the second mating portion includes a first rib and a second rib spaced apart along the longitudinal axis, the first rib and the second rib define an opening, and a second groove is defined therebetween;

[0017] Furthermore, the first rib is embedded in the clamping groove, and the second portion is embedded in the second groove.

[0018] Furthermore, the first part is provided with an extrusion portion connected to the second part, and the second part has an extended positioning portion on its radial surface, the extrusion portion connecting the first part and the positioning portion;

[0019] Furthermore, the extrusion portion covers the first transition surface, and the positioning portion covers the protrusion.

[0020] Furthermore, a recessed avoidance opening is provided on the second outer edge end surface, and the junction between the avoidance opening and the second outer edge end surface is a second transition surface. The positioning portion is adapted to the avoidance opening, and the extrusion portion is fitted to the second transition surface.

[0021] The flexible connection structure provided by the present application has a beneficial technical effect compared to the prior art in that: by providing an elastic damper between the vibration source housing and the handle housing, the vibration energy generated by the vibration source can be effectively absorbed and buffered, reducing the vibration transmitted to the handle housing, and when the second mating portion generates or is subjected to a vertical force, the force can be transmitted to the protrusion through this covering relationship. Moreover, the protrusion and the vibration source housing are integrally formed and have a certain structural strength. In addition, the first mating portion includes a first surface, a second surface, a first transition surface, and a second transition surface that abut against the elastic damper. The cooperation of these surfaces with the elastic damper also disperses and withstands the vertical force to a certain extent.

[0022] Another technical solution employed in this application is to provide a portable multifunctional saw comprising the aforementioned flexible connection structure. Due to the configuration of the flexible connection structure, the corresponding technical effects of the flexible connection structure are achieved by effectively controlling the vibration generated by the saw when operating at high speeds through the use of an elastic damper, reducing handle vibration and improving operator comfort. Furthermore, due to the reduced vibration, the user can more precisely control the saw's cutting path, improving cutting accuracy and work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is an exploded schematic diagram of the flexible connection structure in Example 1 of the present utility model.

[0025] Figure 2 Schematic diagram of the soft connection structure.

[0026] Figure 3 A partial schematic diagram of the soft connection structure.

[0027] Figure 4 This is a partial schematic diagram of the main view direction of the flexible connection structure.

[0028] Figure 5 For the Figure 2 Detailed cross-sectional view of a portion taken along line AA.

[0029] Figure 6 Schematic diagram of the vibration source shell.

[0030] Figure 7 This is a schematic diagram of the vibration source shell from another perspective.

[0031] Figure 8 A schematic diagram of the handle housing.

[0032] Figure 9 Schematic diagram of the elastic damper.

[0033] Figure 10 This is a schematic diagram of a portable multifunctional saw in Example 2 of the present utility model. DETAILED DESCRIPTION

[0034] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0035] Reference Figure 1 and Figure 2 As shown, a flexible connection structure 100 includes a vibration source housing 10, a handle housing 20, and an elastic damper 30. The elastic damper 30 is located between the vibration source housing 10 and the handle housing 20 and is used to connect the vibration source housing 10 and the handle housing 20. When the vibration source housing 10 vibrates, the elastic damper 30 reduces the vibration and resonance generated by the vibration source housing 10 on the handle housing 20.

[0036] Reference Figure 6 and Figure 7 As shown, the portion where the vibration source shell 10 is connected to the handle shell 20 is set as a first matching portion 101, and the first matching portion 101 includes a first outer edge end surface 102 facing the handle shell 20, and a boss 103 extending from the first outer edge end surface 102 toward the handle shell 20 in a direction substantially along the longitudinal axis.

[0037] Among them, the first outer edge end surface 102 includes a first surface 106, a second surface 107 and a first transition surface 108 connecting the first surface 106 and the second surface 107. The second surface 107 protrudes from the first surface 106 and is surrounded by the first transition surface 108 to form a protrusion 109 integrally formed with the vibration source shell 10.

[0038] When viewed from the main direction of the protrusion 109 , the projection of the second outer edge end surface 202 of the second matching portion 201 , which is in abutment with the elastic damper 30 , at least partially covers the protrusion 109 compared to the horizontal bottom surface.

[0039] On the one hand, the elastic damper 30 is clamped between the vibration source shell 10 and the handle shell 20, which can effectively absorb and buffer the vibration energy generated by the vibration source and reduce the vibration transmitted to the handle shell 20. Due to the reduction of vibration, the vibration and discomfort felt by the operator when using the handle shell 20 are greatly reduced, thereby improving the comfort and stability of the operation.

[0040] On the other hand, when viewed from the main viewing direction of the protrusion 109, the outer edge end surface 202 of the second mating portion 201 at least partially covers the protrusion 109 compared to its projection on the horizontal bottom surface. During user operation, when the second mating portion 201 generates or is subjected to a vertical force, the force can be transmitted to the protrusion 109 through this covering relationship. Moreover, the protrusion 109 and the vibration source housing 10 are integrally formed, providing a certain structural strength. In addition, the first mating portion 101 includes a first surface 106, a second surface 107, and a first transition surface 108 that abut against the elastic damper 30. The cooperation between these surfaces and the elastic damper 30 also disperses and withstands vertical forces to a certain extent.

[0041] In addition, the boss 103 has a flange 104 and a first groove 105. The first groove 105 surrounds the boss 103 and is defined between the first outer edge end surface 102 and the flange 104. The boss 103 ends at the flange 104, and the flange 104 extends outward from the boss 103 in a direction generally transverse to the radial direction.

[0042] The design of the boss 103 of the first mating part 101, especially the boss 103 extending and protruding from the longitudinal axis, provides a stable basic support for the entire connection structure. The presence of the boss 103 makes the connection between the vibration source shell 10 and the elastic damper 30 more secure, reducing the loosening or displacement that may occur under vibration or force conditions.

[0043] Preferably, boss 103 is integrally formed with vibration source housing 10. Compared to a separate, connected, and then assembled approach, this integral molding avoids structural instability caused by gaps between connected components or loose connections. During device operation, especially when the vibration source vibrates, the integrally molded structure can better withstand the stress caused by vibration, reduce relative displacement between components, and thus enhance the stability of the entire connection.

[0044] The boss 103 comprises a flange 104 and a first groove 105, further enhancing structural stability. The flange 104 serves to limit the position of the elastic damper 30, preventing it from shifting during use, while the first groove 105 provides a space for installation and positioning of the elastic damper 30, allowing it to better perform its cushioning and shock-absorbing functions.

[0045] Furthermore, protrusion 109 extends radially toward the bottom of first groove 105 and is integrally connected thereto. This design strengthens the connection between protrusion 109 and boss 103, enabling the entire structure to more stably transmit force and disperse stress when subjected to external forces, thereby improving the overall strength and reliability of the structure. Furthermore, the presence of protrusion 109 increases the contact area between elastic damper 30 and vibration source housing 10, thereby better absorbing and dispersing vibration energy and reducing vibration transmission to handle housing 20.

[0046] In addition, continue to refer to Figure 6 and Figure 7 As shown, boss 103 comprises a first boss half 110 and a second boss half 111 connected to each other. A connecting post 112 protrudes from the inner walls of both bosses at the connection point. Connecting post 112 is provided with a connecting hole 113. A connecting member penetrates through connecting hole 113 to connect the two. Connecting hole 113 is provided at the bottom of first groove 105. When the boss is subjected to external forces, connecting post 112 can better withstand and disperse the stress, making the boss structure more stable.

[0047] So, refer to Figure 7 As shown, a structural design is formed in the annular groove portion of the boss with connecting columns 112 at the top and bottom and protrusions 109 at the left and right. The combination of the connecting columns 112 and the protrusions 109 forms a multi-directional support structure. The connecting columns 112 provide a stable connection and support in the up and down directions. This coordinated constraint in the up and down and left and right directions enables the boss 103 to remain stable when subjected to forces in all directions (such as vibration, external force impact, etc.), thereby enhancing the deformation resistance and fracture resistance of the entire structure. When subjected to external forces, the connecting columns 112 and the protrusions 109 can disperse the stress to a larger area. For example, when vertical pressure acts on the boss 103, the connecting columns 112 transfer the pressure to the structure around the annular groove, while the left and right protrusions 109 also share part of the pressure, avoiding stress concentration at a certain point, thereby reducing the risk of structural damage.

[0048] Reference Figure 3 、 Figure 4 、 Figure 8The portion where the handle housing 20 is connected to the vibration source housing 10 is provided as a second mating portion 201, and the second mating portion 201 includes a second outer edge end surface 202 facing the vibration source housing 10 and positioned opposite to the first outer edge end surface 102. The second mating portion 201 further defines an opening 203 extending from the second outer edge end surface 202 toward the inside of the handle housing 20 along the longitudinal axis. The opening 203 is configured to receive the boss 103, so that the boss 103 is clamped by the second mating portion 201. The second mating portion 201 also has a second groove 204, wherein the second mating portion 201 includes a first rib 205 and a second rib 206 extending into the opening 203 and spaced apart along the longitudinal axis of the handle housing 20, wherein the first rib 205 and the second rib 206 extend inwardly toward the inside of the handle housing 20 substantially in a direction transverse to the longitudinal axis. The second groove 204 is defined between the first rib 205 and the second rib 206. In addition, a recessed escape opening 207 is provided on the second outer edge end surface 202 , and the junction between the escape opening 207 and the second outer edge end surface 102 is a second transition surface 208 .

[0049] Reference Figure 9 The elastic damper 30 is overmolded onto the boss 103 and covers the connection hole 113 on the first groove 105 and the first outer edge end surface 102. The elastic damper 30 includes a first portion 302 and a second portion 303, as well as a clamping groove 304 located between the first portion 302 and the second portion 303. The first portion 302 is nested in the first groove 105 and fits with the first outer edge end surface 102 and the first transition surface 108. The second portion 303 is sleeved on the outer periphery of the flange 104 to cover and surround the flange 104. The first portion 302 is provided with an extrusion portion 305 connected to the second portion 303. The second portion 303 has an extended positioning portion 306 on its radial surface. The extrusion portion 305 connects the first portion 302 and the positioning portion 306. One side of the extrusion portion 305 fits with the first transition surface 108, and the positioning portion 306 covers the protrusion 109. In other embodiments, the elastic damper 30 can be molded separately from the vibration source housing 10 and subsequently coupled to the boss 102. In the same or other embodiments, the elastic damper 30 can include a unitary structure such that the elastic damper 30 is formed as a single piece. The elastic damper 30 is formed from a material that is softer than the material of the vibration source housing 10 and the handle housing 20, such as rubber or a thermoplastic elastomer.

[0050] In this embodiment, the elastic damper 30 is divided into two damping halves 301 corresponding to two corresponding half bosses.

[0051] Reference Figure 3 、 Figure 5In actual application of the flexible connection structure 100, the first half boss 110 and the second half boss 111 are fixedly connected through the connecting column 112 and a connecting member is inserted into the connecting hole 113. Then, the elastic damper 30 is covered on the boss 102. At this time, the positioning portion 306 of the elastic damper 30 is aligned and in contact with the protrusion 109, and the extrusion portion 305 covers the first transition surface 108. After the elastic damper 30 is installed, the vibration source housing 10 and the handle housing 20 can be connected. That is, the first rib 205 is embedded in the clamping groove 304, the second portion 303 is embedded in the second groove 204, and the positioning portion 306 is embedded in the avoidance opening 207. The extrusion portion 305 contacts the second transition surface 208. The elastic damper 30 is locked between the first mating portion 101 and the second mating portion 201, completing the connection between the vibration source housing 10 and the handle housing 20.

[0052] Example 2

[0053] Reference Figure 10 Based on the same technical concept, an embodiment of the present application provides a portable multi-functional saw 200, including the soft connection structure 100 in the above embodiment, wherein the vibration source shell is constructed as a body 210 with a saw head, and the handle shell 20 is constructed as a handle 220. The portable multi-functional saw 200 correspondingly has the technical effect of the above-mentioned soft connection structure 100. When the body 210 with a saw head of the portable multi-functional saw 200 starts working, the handle 220 connected thereto reduces the vibration transmitted from the body 210 to the handle 220 during operation through the elastic damper 30, thereby improving the working accuracy and preventing damage.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flexible connection structure comprising: Vibration source housing and handle housing; an elastic damper, which is sandwiched between the vibration source housing and the handle housing; The vibration source housing and the handle housing respectively have a first matching portion and a second matching portion that abut against the elastic damper; The first mating portion includes a first outer edge end surface that abuts against the elastic damper, the first outer edge end surface includes a first surface, a second surface, and a first transition surface connecting the first surface and the second surface, the second surface protrudes from the first surface, and together with the first transition surface, forms a protrusion integrally formed with the vibration source housing; When viewed from the main viewing direction of the protruding portion, the projection of the second outer edge end surface of the second matching portion that abuts against the elastic damper at least partially covers the protruding portion compared to the horizontal bottom surface.

2. The flexible connection structure according to claim 1, wherein: The first matching portion includes a boss extending and protruding along the longitudinal axis, the boss includes a flange and a first groove located between the flange and the first outer edge end surface, and the protrusion extends radially toward the bottom of the first groove and is integrally connected thereto.

3. The flexible connection structure according to claim 2, characterized in that: The boss includes a first half boss and a second half boss connected to each other, and a connecting column structure protruding from the inner walls of the two is formed on the inner side of the connection between the two. The connecting column structure is provided with a connecting hole, and the two are connected by a connecting piece passing through the connecting hole.

4. The flexible connection structure according to claim 3, characterized in that: The connecting hole is opened at the bottom of the first groove, and the elastic damper can cover the connecting hole.

5. The flexible connection structure according to claim 3, characterized in that: The elastic damper includes a first portion, a second portion, and a clamping groove located between the first portion and the second portion.

6. The flexible connection structure according to claim 5, characterized in that: The first portion is nested in the first groove and fits with the first outer edge end surface and the surface of the transition surface. The second portion is sleeved on the outer periphery of the flange to cover and surround the flange.

7. The flexible connection structure according to claim 5, characterized in that: The second mating portion includes a first rib and a second rib spaced apart along a longitudinal axis, the first rib and the second rib defining an opening and defining a second groove therebetween; The first rib is embedded in the clamping groove, and the second portion is embedded in the second groove.

8. The flexible connection structure according to claim 5, characterized in that: The first part is provided with an extrusion portion connected to the second part, and the radial surface of the second part is provided with an extended positioning portion, and the extrusion portion connects the first part and the positioning portion; The extrusion portion covers the first transition surface, and the positioning portion covers the protrusion.

9. The flexible connection structure according to claim 8, characterized in that: The second outer edge end surface is provided with a recessed avoidance opening, the junction between the avoidance opening and the second outer edge end surface is a second transition surface, the positioning portion is adapted to the avoidance opening, and the extrusion portion is fitted with the second transition surface.

10. A portable multifunctional saw, characterized in that: A flexible connection structure comprising any one of claims 1-9.

Images