Buffer structure and electric tool

Abstract

The invention discloses a buffering structure and an electric tool, belongs to the technical field of electric tools, and aims to solve the problem that part of electric tools are poor in damping and buffering effect. According to the technical scheme, the buffering structure is characterized in that the buffering structure comprises two buffering plates and an elastic piece detachably connected with the buffering plates, the adjacent ends of the two buffering plates are connected in a clamped mode, and the elastic piece is located between the two adjacent buffering plates and is in a compressed state; when the elastic piece deforms due to vibration of external force, the two buffer plates vibrate in a reciprocating mode along with deformation of the elastic piece to generate relative displacement, the buffer structure is compact, occupied space is smaller, and good stability is achieved. The operation comfort and safety of the electric tool are improved, the durability and reliability of the tool are enhanced, the electric tool is suitable for being used for a long time in the high-impact and high-vibration environment, and the damping effect and the use experience of the tool are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric tools, and more particularly to a buffer structure and an electric tool. Background Art

[0002] Handheld power tools are common equipment in modern processing, manufacturing and construction. They are usually powered by a motor and drive the tool head to rotate or reciprocate through a specific transmission structure to complete operations such as drilling, tightening or tapping, thereby improving work efficiency and work quality. The precision parts of the tool, such as gears, bearings and control panels, are all housed in the tool housing to reduce the impact of vibration and impact on the parts.

[0003] However, during the high-speed operation of power tools, especially in tools such as hammer drills, the strong impact force generated by the impact mechanism during operation will not only act on the working material, but also part of the reaction force will be transmitted back to the tool body, causing vibration of internal parts, which may cause damage to sensitive electronic components such as control panels. In addition, the impact force will also be transmitted to the operator's hands through the tool, resulting in poor user experience and operator fatigue.

[0004] Currently, many hammer drill-type handheld power tools on the market have deficiencies in buffering and shock absorption design. Some products only adopt simple shock absorption and buffering measures or have no special shock absorption and buffering structure at all, and cannot effectively reduce the impact and vibration on precision components and operators. Therefore, it is necessary to propose a new solution to solve the problem of poor shock absorption and buffering effect of some power tools. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a buffer structure and an electric tool, so as to improve the shock absorbing and buffering effect of the electric tool through the setting of the structure.

[0006] The above technical purpose of the present invention is achieved through the following technical scheme: a buffer structure, including two buffer plates and an elastic member detachably connected to the buffer plates, the adjacent ends of the two buffer plates are clamped with each other, the elastic member is located between the two adjacent buffer plates and is in a compressed state, and when the elastic member is deformed by external force vibration, the two buffer plates vibrate back and forth with the deformation of the elastic member to produce relative displacement.

[0007] The present invention is further configured as follows: the buffer plate is fixedly connected with connecting hook teeth and a plurality of pins, and the two ends of the elastic member are respectively sleeved on the pins of two adjacent buffer plates.

[0008] The present invention is further configured as follows: a through slot is provided on the connecting hook tooth, and the connection between the connecting hook tooth and the buffer plate is configured as a step, and when two adjacent buffer plates are connected, the connecting hook tooth penetrates into the through slot.

[0009] The present invention also discloses an electric tool, comprising a motor housing and a handle housing that are detachably connected to each other, and also comprising the buffer structure described in any of the above items, wherein the connection between the motor housing and the handle housing comprises an upper connection and a lower connection, the buffer plate is clamped at the upper connection, and a gap is left between the positions of the upper connections of the motor housing and the handle housing.

[0010] The present invention is further configured as follows: fixing components for clamping the buffer plate are respectively arranged on both sides of the connection between the motor housing and the handle housing near the upper end, and the fixing components include a plurality of support plates, and grooves are formed between the support plates.

[0011] The present invention is further configured as follows: the motor housing and the handle housing are fixedly connected with a plurality of housing latch teeth on the inner side walls close to the support member, and a plurality of housing latch grooves are formed between the latch teeth.

[0012] The present invention is further configured as follows: a plurality of buffer slots are opened at one end of the buffer plate away from the connecting hook teeth, and buffer teeth are formed by dividing the buffer slots. When the motor housing and the handle housing are connected, the buffer teeth are inserted into the housing slots and the housing teeth are inserted into the buffer slots.

[0013] The present invention is further configured as follows: a rotation groove is provided at the lower end connection of the motor housing, a rotation shaft matching the rotation groove is fixedly connected to the lower end connection of the handle housing, and a buffer ring is sleeved between the rotation shaft and the rotation groove.

[0014] The present invention is further configured to include a battery, wherein the rotation axis is located below the center of gravity of the handle in a state where the battery is installed.

[0015] The present invention is further configured as follows: a sliding engaging track is provided on the lower edge of the handle housing, and the battery and the handle housing are detachably connected via the sliding engaging track.

[0016] In summary, the present invention has the following beneficial effects:

[0017] By arranging a buffer structure and a buffer ring in the housing of the electric tool, efficient shock absorption and impact force offset are achieved during vibration and impact, allowing the motor housing and the handle housing to generate rotational motion when subjected to vibration and impact, and utilizing the relative motion between the buffer structures to offset part of the impact force and vibration. At the same time, the impact force and vibration that are not completely unloaded are absorbed by the buffer ring, thereby protecting the internal structure of the equipment and increasing its service life.

[0018] The buffer structure at the upper end connection can vibrate back and forth to produce relative displacement during the buffering process, and work together with the rotating shaft formed by the rotating shaft at the lower end connection. When the motor drives the power tool to generate impact force, the lower end connection can produce a small circular motion, while the upper end connection reciprocates the buffer structure through the rotation angle, further optimizing the shock absorption effect. The buffer ring can also reduce the relative collision between the rotating shaft and the rotating groove when impact force is generated, thereby extending the service life of the rotating shaft and keeping the buffer structure effective.

[0019] Compared with the existing technology, the buffer structure is compact, occupies less space, and has good stability. It not only improves the operating comfort and safety of the power tool, but also enhances the durability and reliability of the tool, making it suitable for long-term use in high-impact and high-vibration environments, and significantly improves the shock absorption effect and user experience of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention, and the head and impact mechanism of the electric tool are not shown in the following figures;

[0021] Figure 2 A cross-sectional view of the present invention with the battery removed;

[0022] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0023] Figure 4 is a cross-sectional view of the present invention;

[0024] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0025] Figure 6 It is a structural schematic diagram of the buffer structure;

[0026] Figure 7 It is a structural schematic diagram of the buffer plate;

[0027] Figure 8 It is a structural schematic diagram of the motor housing on one side when the buffer structure is clamped on the motor housing;

[0028] Fig. 9 It is a schematic diagram of the internal structure of the handle housing on one side when the buffer structure is snapped onto the handle housing.

[0029] In the figure: 1. motor housing; 2. handle housing; 3. lower end connection; 41. buffer plate; 411. connecting hook teeth; 412. pin; 413. through groove; 42. elastic member; 51. support plate; 52. groove; 61. housing tooth; 62. housing slot; 71. buffer tooth; 72. buffer slot; 81. rotating slot; 82. rotating shaft; 9. buffer ring; 10. battery. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0031] Example:

[0032] like Figure 1 As shown, a buffer structure and an electric tool, taking an electric hammer as an example, include a head, a motor, an impact mechanism, a motor housing 1 and a handle housing 2 that are detachably connected to each other, and a battery 10 installed below the holding position of the handle housing 2. The motor housing 1 and the handle housing 2 are both symmetrical two-sided housings. The motor is used to provide driving force for the electric tool, and the impact mechanism transmits the driving force. The motor is installed in the motor housing and connected to the impact mechanism. When in use, the hand is held at the holding position of the handle housing 2. A sliding locking track is provided at the lower edge of the handle housing 2. The battery 10 and the handle housing 2 are detachably connected through the sliding locking track, which is convenient for users to replace the battery 10 or charge.

[0033] like Figure 2 , Figure 3 , Figure 6 and Figure 7As shown, the connection between the motor housing 1 and the handle housing 2 includes an upper connection and a lower connection 3, and the buffer structure is clamped at the upper connection. The buffer structure includes two buffer plates 41 and two elastic members 42. The buffer plate 41 is a sheet metal part, and the elastic member 42 is a spring. The buffer plate 41 is integrally formed with a hook-shaped connecting hook tooth 411 and two long strip pins 412. The connection between the connecting hook tooth 411 and the buffer plate 41 is set in a stepped shape. The two pins 412 are respectively located on both sides of the connecting hook tooth 411. A square through groove 413 is opened on the connecting hook tooth 411. The adjacent ends of the two buffer plates 41 are connected to each other by the connecting hook tooth 411 penetrating into the other side's through groove 413, and the connecting hook tooth 411 can reciprocate in the through groove 413 along the length direction of the elastic member 42. The elastic member 42 The two ends are respectively sleeved on the pins 412 corresponding to the two adjacent buffer plates 41 and are in a compressed state. A gap is left between the motor housing 1 and the upper end connection of the handle housing 2. When the elastic member 42 is deformed by the vibration of the impact mechanism, the two buffer plates 41 reciprocate and vibrate with the deformation of the elastic member 42 to produce relative displacement, which can reduce vibration and impact force when using an electric hammer, improve operating comfort and work efficiency, and ensure the connection stability between the buffer plates 41 through the connection structure of the hook teeth 411, the pins 412, the through grooves 413 and the elastic member 42, thereby reducing the risk of loosening or falling off during use, and reducing the size of the elastic member 42 used by the two elastic members 42, thereby making the buffer structure more compact and occupying less space.

[0034] like Figure 4-Figure 7 As shown, fixing components for clamping the buffer plate 41 are respectively provided on both sides of the connection near the upper end of the motor housing 1 and the handle housing 2, and the fixing components on each side include two upper and lower groups of support plates 51, each group of support plates 51 has three, the support plates 51 are integrally formed with the motor housing 1 and the handle housing 2, and a groove 52 is formed between the support plates 51, and a pair of shell teeth 61 are integrally formed on the inner side walls of the motor housing 1 and the handle housing 2 near each side of the support member, and a group of shell slots 62 are formed between the teeth, and a buffer slot 72 is respectively provided on both sides of the end of the buffer plate 41 away from the connecting hook tooth 411, and two buffer teeth 71 are formed by separating the buffer slot 72, and when the motor housing 1 and the handle housing 2 are connected, the buffer tooth 71 is inserted into the shell slot 62 and the shell tooth 61 is inserted into the buffer slot 72, thereby improving the stability and durability of the overall structure.

[0035] like Figure 2 , Figure 6 , Figure 8 and Fig. 9As shown, a circular rotating groove 81 is formed at the lower end connection 3 of the motor housing 1, and a cylindrical rotating shaft 82 matching the rotating groove 81 is integrally formed at the lower end connection 3 of the handle housing 2. A rubber buffer ring 9 is sleeved between the rotating shaft 82 and the rotating groove 81. The rotating shaft 82 is set at a position lower than the center of gravity after the battery 10 is installed in the handle, which is beneficial to maintaining the balance of the power tool, improving the operational stability, achieving a close fit between the housing and the buffer plate 41, and further improving the stability of the overall structure.

[0036] Installation steps: Figure 1-Figure 9 As shown, the two buffer plates 41 are placed opposite to each other, the two elastic members 42 are sleeved on the two pins 412 of one of the buffer plates 41, and then the connecting hook is inserted into the other's groove 52, and the two pins 412 of the other buffer plate 41 are inserted into the end of the elastic member 42 that is not inserted into the pins 412, and the buffer ring 9 is inserted into the rotating groove, and the rotating shaft 82 equipped with the buffer ring 9 is inserted into the buffer ring 9, and then the assembled buffer structure is horizontally inserted between the upper and lower groups of support plates 51, and the buffer tooth 71 is inserted into the shell slot 62, and the shell tooth 61 is inserted into the buffer slot 72, and the motor housing 1 on both sides is buckled with the handle housing 2, and then the battery 10 is installed on the handle housing 2 along the sliding locking track.

[0037] Working principle: Figure 1-Figure 9 As shown, when the electric tool is working, the motor provides driving force, and the impact force generated by the driving force will simultaneously generate a reverse impact force acting on the upper end connection between the motor housing 1 and the handle housing 2. The buffer plate 41 and the elastic member 42 are subjected to the impact force, and the elastic member 42 is compressed. The buffer plate 41 then vibrates back and forth to produce relative displacement. At the same time, the rotating shaft 82 at the lower end connection 3 of the motor housing 1 and the handle housing 2 produces a small circular motion, and the upper end connection reciprocates the buffer structure with the elastic member 42 through the rotation angle. The force that is not completely unloaded during the rotation process will be absorbed by the rubber member. The added buffer ring 9 has a buffering and protective effect on the rotating groove and the rotating shaft 82, so as to reduce the collision of the rotating groove and the rotating shaft 82 caused by the impact force during the impact process, thereby extending the service life of the rotating groove and the rotating shaft 82 and ensuring the effectiveness of the buffer structure.

[0038] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect" and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A buffer structure, characterized in that: The invention comprises two buffer plates (41) and an elastic member (42) detachably connected to the buffer plates (41); adjacent ends of the two buffer plates (41) are mutually clamped; the elastic member (42) is located between the two adjacent buffer plates (41) and is in a compressed state; when the elastic member (42) is deformed by external vibration, the two buffer plates (41) reciprocate and vibrate along with the deformation of the elastic member (42) to generate relative displacement.

2. A buffer structure according to claim 1, characterized in that: The buffer plate (41) is fixedly connected with a connecting hook tooth (411) and a plurality of pins (412), and the two ends of the elastic member (42) are respectively sleeved on the pins (412) of two adjacent buffer plates (41).

3. A buffer structure according to claim 2, characterized in that: A through slot (413) is provided on the connecting hook tooth (411), and the connection between the connecting hook tooth (411) and the buffer plate (41) is arranged in a stepped shape. When two adjacent buffer plates (41) are connected, the connecting hook tooth (411) penetrates into the through slot (413).

4. An electric tool, comprising a motor housing (1) and a handle housing (2) detachably connected to each other, characterized in that: It comprises the buffer structure as described in any one of claims 1 to 3, wherein the connection between the motor housing (1) and the handle housing (2) comprises an upper connection and a lower connection (3), the buffer plate (41) is clamped at the upper connection, and a gap is left between the positions of the upper connections of the motor housing (1) and the handle housing (2).

5. The electric tool according to claim 4, characterized in that: Fixing components for clamping the buffer plate (41) are respectively arranged on both sides of the motor housing (1) and the handle housing (2) near the upper end connection, and the fixing components include a plurality of support plates (51), and grooves (52) are formed between the support plates (51).

6. The electric tool according to claim 5, characterized in that: The motor housing (1) and the handle housing (2) are fixedly connected with a plurality of housing latch teeth (61) on the inner side walls close to the support member, and a plurality of housing latch grooves (62) are formed between the latch teeth.

7. The electric tool according to claim 6, characterized in that: A plurality of buffer slots (72) are formed at one end of the buffer plate (41) away from the connecting hook teeth (411), and the buffer slots (72) are used to separate the buffer teeth (71). When the motor housing (1) and the handle housing (2) are connected, the buffer teeth (71) are inserted into the housing slots (62) and the housing teeth (61) are inserted into the buffer slots (72).

8. The electric tool according to claim 4, characterized in that: The lower connection part (3) of the motor housing (1) is provided with a rotation groove (81), and the lower connection part (3) of the handle housing (2) is fixedly connected with a rotation shaft (82) matching with the rotation groove (81), and a buffer ring (9) is sleeved between the rotation shaft (82) and the rotation groove (81).

9. The electric tool according to claim 4, further comprising a battery (10), characterized in that: The rotating shaft (82) is located below the center of gravity of the handle when the battery (10) is installed.

10. The electric tool according to claim 9, characterized in that: The lower edge of the handle housing (2) is provided with a sliding engagement track, and the battery (10) and the handle housing (2) are detachably connected via the sliding engagement track.

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