Battery pack damping structure of electric tool

Abstract

The utility model discloses a battery pack damping structure of an electric tool, which comprises a shell and a battery pack, a battery compartment is arranged on the shell, a socket is arranged on one side of the battery compartment, guide convex ribs are arranged on opposite inner walls of two sides of the battery compartment, an electrode insert is arranged at the top of the battery compartment, two guide grooves and electrode terminals are arranged on the battery pack, and the two guide grooves are communicated with the electrode terminals. The inserted battery pack is guided by the guide convex rib to move to the position where the electrode insertion piece is electrically connected with the electrode terminal in the first direction, the battery pack is completely contained in the battery bin at the position, a lock groove is formed in the battery bin, a lock catch, a button and a reset spring are arranged on the battery pack, and a first damping part is installed on the inner wall of the side, opposite to the insertion opening, of the battery bin. A second damping part is arranged at the top of the battery compartment, and the first damping part and the second damping part are supported between the inner wall of the battery compartment and the battery pack so as to relieve vibration transmitted to the battery pack.

Description

Technical Field

[0001] This utility model relates to an electric tool, and more particularly to a battery pack shock absorption structure for an electric tool. Background Technology

[0002] Power tools are mechanized devices powered by electric motors, which drive the working head through a transmission mechanism or electric motor. They have advantages such as portability, ease of operation, and versatility, greatly reducing labor intensity, improving work efficiency, and mechanizing manual operations. Examples include electric hammers, electric picks, electric screwdrivers, and electric drills. Commercially available power tools generally use two power supply methods: external power supply and battery packs. Using an external power supply often limits operation to locations with power outlets, significantly restricting the scope of application. Battery packs effectively solve this problem.

[0003] For example, patent CN211517389U discloses a high-efficiency electric hammer, which includes an electric hammer body. The electric hammer body is equipped with a brushless motor, which is connected to a controller located below. The controller is connected to a rotary speed control assembly located on the outside of the electric hammer body. A battery pack for power supply is provided on one side of the electric hammer body. The battery pack and the mounting part on the electric hammer body are slidably inserted and engaged through guide ribs and guide grooves. The battery pack slides along the guide ribs so that the male plug on the mounting part contacts the female plug on the battery pack to achieve electrical connection. The battery pack supplies power to the electric hammer.

[0004] Because power tools (especially power tools with impact functions such as electric hammers) vibrate during use, the battery pack mounted on the housing also vibrates. This vibration causes the male connector on the mounting part and the female connector on the battery pack to make contact intermittently. In particular, the vibration in the sliding insertion direction between the battery pack and the power tool has a serious impact on the connection between the male and female connectors. This intermittent contact between the male and female connectors can easily generate sparks, which can burn out the male and female connectors. Utility Model Content

[0005] Based on the aforementioned vibrations that cause the male connector on the mounting section and the female connector on the battery pack to make intermittent contact, especially the vibrations in the sliding connection direction between the battery pack and the power tool, which have a particularly serious impact on the connection between the male and female connectors, this utility model provides a vibration damping structure for the battery pack of a power tool.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a battery pack shock absorption structure for power tools, including a housing and a battery pack. The housing is provided with a battery compartment for installing the battery pack. One side of the battery compartment is provided with an insertion port for inserting the battery pack. The inner walls on both sides of the battery compartment are provided with guide ribs to guide the inserted battery pack. The top of the battery compartment is provided with an electrode insert. The battery pack is provided with two guide grooves that slide and cooperate with the guide ribs on both sides, and electrode terminals that are electrically connected to the electrode inserts. The inserted battery pack is guided by the guide ribs to move along a first direction to the position where the electrode inserts and electrode terminals are electrically connected. At this position, the battery pack is completely contained in the battery compartment. The battery compartment is provided with a locking groove. The battery pack is provided with a latch that engages with the locking groove, a button for driving the latch to unlock, and a return spring.

[0007] A first shock absorber is installed on the inner wall of the battery compartment opposite to the socket, and a second shock absorber is provided on the top of the battery compartment. The first and second shock absorbers are supported between the inner wall of the battery compartment and the battery pack to reduce the vibration transmitted to the battery pack.

[0008] A further preferred embodiment of this utility model is as follows: the top of the battery pack is provided with an abutting part that contacts the second shock absorber, the abutting part is an inclined surface, and the inclined surface is inclined along a first direction when the battery pack is placed in the battery compartment.

[0009] A further preferred embodiment of this utility model is as follows: the locking groove is located at the top of the battery compartment, the latch extends from the top of the battery pack and engages with the locking groove, and there are two second shock absorbers, which are respectively located on both sides of the locking groove.

[0010] A further preferred technical solution of this utility model is as follows: the first shock absorber is a cylindrical rubber column, and a first groove is provided on the inner wall of the side of the battery compartment opposite to the plug. The rubber column is inserted into the first groove and fixed, and partially protrudes out of the first groove and abuts against the side of the battery pack. The first groove is provided with a first slot for the rubber column to protrude, and the first slot is directly opposite the plug.

[0011] A further preferred technical solution of this utility model is as follows: the second shock absorber is a cylindrical rubber column, the top of the battery compartment is provided with a second groove, the rubber column is inserted into the second groove and fixed, and partially protrudes out of the second groove and abuts against the top of the battery pack, the second groove is provided with a second slot for the rubber column to protrude, and the second slot faces obliquely to the insertion side.

[0012] A further preferred embodiment of this utility model is: the cross-sectional shape of the first groove is a circle of N quarters, where N is greater than 2 and less than 4, so that the width of the first groove is less than the diameter of the first shock absorber.

[0013] A further preferred embodiment of this utility model is that the cross-sectional shape of the second groove is a circle of N quarters, where N is greater than 2 and less than 4, so that the width of the second groove is less than the diameter of the second shock absorber.

[0014] A further preferred embodiment of this invention is that the axial direction of the second shock absorber is parallel to the inclined plane.

[0015] A further preferred embodiment of this utility model is that the insertion port is located on one side of the guide rib along its length.

[0016] A further preferred embodiment of this utility model is as follows: an electrode base is fixed on the top of the battery compartment, an electrode insert is mounted on the electrode base, a connecting seat is provided on the top of the battery pack, guide grooves are provided on both sides of the connecting seat, and an interface is provided on one end of the connecting seat for inserting the electrode insert into and electrically connecting with the electrode terminal.

[0017] Compared with the prior art, the advantages of this utility model are that a first shock absorber is installed on the inner wall of the battery compartment opposite to the socket, and a second shock absorber is provided on the top of the battery compartment. When the battery pack is placed in the battery compartment, the first and second shock absorbers are supported between the inner wall of the battery compartment and the battery pack to reduce the vibration transmitted from the shell to the battery pack, reduce the impact of vibration on the electrode inserts and electrode terminal connections, and prevent the electrode inserts on the shell and the electrode terminals on the battery pack from being burned due to arcing. In addition, the battery pack is completely contained in the battery compartment when installed, so that the shell can provide good protection for the battery pack and reduce the probability of the battery pack being damaged by the machine falling or by collision with other objects. Attached Figure Description

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the shell portion of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the shell portion of the present invention. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the battery pack structure;

[0022] Figure 4 This is a schematic diagram of the overall structure of the battery packaged inside the battery compartment.

[0023] Figure 5 A schematic diagram of the overall longitudinal section of the battery packaged inside the battery compartment. Figure 1 ;

[0024] Figure 6 This is a schematic diagram of the overall horizontal cross-section of the battery package inside the battery compartment;

[0025] Figure 7 for Figure 6 A magnified view of part A;

[0026] Figure 8 A schematic diagram of the overall longitudinal section of the battery packaged inside the battery compartment. Figure 2 ;

[0027] Figure 9 for Figure 8 A magnified view of section B.

[0028] In the diagram: 1. Housing; 2. Battery compartment; 3. Socket; 4. Guide rib; 5. Electrode holder; 6. Second shock absorber; 7. Locking groove; 8. Electrode insert; 9. First shock absorber; 10. Battery pack; 11. Connecting seat; 12. Socket interface; 13. Lock; 14. Locking opening; 15. Guide groove; 16. Button; 17. Connecting bracket; 18. Button opening; 19. First recess; 20. First slot; 21. Second recess; 22. Second slot; 23. Sloping surface. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0030] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0031] Figures 1-9As shown, the battery pack shock absorption structure of the power tool includes a housing 1 and a battery pack 10. The housing 1 has a battery compartment 2 for installing the battery pack 10. One side of the battery compartment 2 has an insertion port 3 for inserting the battery pack 10. The inner walls of the battery compartment 2 on both sides have guide ribs 4 to guide the inserted battery pack 10. The top of the battery compartment 2 has an electrode insert 8. The battery pack 10 has two guide grooves 15 that slide with the guide ribs 4 on both sides and an electrode terminal that is electrically connected to the electrode insert 8. The inserted battery pack 10 is guided by the guide ribs 4 to move along a first direction to the position where the electrode insert 8 is electrically connected to the electrode terminal. At this position, the battery pack 10 is completely contained in the battery compartment 2. The battery compartment 2 has a locking groove 7. The battery pack 10 has a latch 13 that engages with the locking groove 7, a button 16 for unlocking the latch 13, and a return spring. The latch 13 engages with the locking groove 7 to lock the battery pack 10 in the battery compartment 2 for power supply.

[0032] Figure 4 As shown, the battery pack 10 is completely housed within the battery compartment 2 during installation, allowing the housing 1 to provide good protection for the battery pack 10 and reducing the likelihood of the battery pack 10 being damaged by falling machinery or colliding with other objects.

[0033] Figure 2 As shown, the insertion port 3 is located on one side of the guide rib 4 along its length.

[0034] Figure 5 As shown, specifically, an electrode base 5 is fixed on the top of the battery compartment 2, and an electrode insert 8 is mounted on the electrode base 5. A connecting seat 11 is provided on the top of the battery pack 10, and guide grooves 15 are provided on both sides of the connecting seat 11. The aforementioned electrode terminals are housed in the connecting seat 11. One end of the connecting seat 11 is provided with a plug interface 12 for the electrode insert 8 to be inserted and electrically connected to the electrode terminals inside. After the battery pack 10 is inserted into the battery compartment 2, the guide groove 15 on the battery pack 10 slides in cooperation with the guide rib 4 inside the battery compartment 2. The battery pack 10 slides forward along the guide rib 4 in the first direction until it slides to the position where the electrode insert 8 inside the battery compartment 2 is inserted from the plug interface 12 on the connecting seat 11 and electrically connected to the electrode terminals. At this position, the latch 13 is opposite to the locking groove 7, and the latch 13 is engaged in the locking groove 7 to restrict the battery pack 10 from moving away from the battery compartment 2 along the first direction towards the plug 3 side.

[0035] A first shock absorber 9 is installed on the inner wall of the battery compartment 2 opposite to the socket 3, and a second shock absorber 6 is provided on the top of the battery compartment 2. When the battery pack 10 is installed in the battery compartment 2 for power supply, the first shock absorber 9 and the second shock absorber 6 are supported between the inner wall of the battery compartment 2 and the battery pack 10 to reduce the vibration transmitted from the housing 1 to the battery pack 10, reduce the impact of vibration on the electrode inserts 8 and the electrode terminal connection, and prevent the electrode inserts 8 on the housing 1 and the electrode terminals on the battery pack 10 from being burned due to arcing.

[0036] During use, the first shock absorber 9 is supported between the front side of the battery pack 10 and the inner wall of the battery compartment 2 opposite to the socket 3, so as to reduce the back-and-forth vibration of the battery pack 10 in the first direction.

[0037] Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 As shown, preferably, the first shock absorber 9 is a cylindrical rubber column. A first groove 19 is provided on the inner wall of the side of the battery compartment 2 opposite to the socket 3. The rubber column is inserted into the first groove 19 and fixed, and partially protrudes from the first groove 19 to abut against the front side of the battery pack 10. The first groove 19 is provided with a first slot 20 for the rubber column to protrude. The first slot 20 is directly opposite the socket 3, so that the front side of the battery pack 10 can press directly on the first shock absorber 9 and receive the elastic force of the first shock absorber 9 more directly. This structure enables the first shock absorber 9 to achieve the best shock absorption effect.

[0038] The cross-sectional shape of the first groove 19 is a circle of N quarters, where N is greater than 2 and less than 4, so that the width of the first slot 20 is less than the diameter of the first damping member 9. Preferably, the cross-sectional shape of the first groove 19 is a circle of two-thirds. This structure ensures that after the first damping member 9 is installed in the first groove 19, it will not come out of the first groove 19. The first damping member 9 is confined and fixed within the first groove 19. Due to its elasticity, the first damping member 9 can be inserted into the first groove 19 through its own elastic deformation. The diameter of the first groove 19 can be the same as the diameter of the first damping member 9; or, the diameter of the first damping member 9 can be slightly larger than the diameter of the first groove 19, so that when the first damping member 9 is installed in the first groove 19, the first damping member 9 and the inner wall of the first groove 19 are interference-fitted.

[0039] Preferably, the inner wall of the battery compartment 2 opposite to the socket 3 is provided with three first grooves 19. The three first grooves 19 are arranged sequentially from left to right along the width of the inner wall. When the first shock absorber 9 is installed in the first groove 19, the axis of the first shock absorber 9 is vertically arranged, and the three first shock absorbers 9 can be more balancedly supported on the front side of the battery pack 10.

[0040] Figure 2 , Figure 3 , Figure 4 , Figure 8 , Figure 9 As shown, the top of the battery pack 10 is provided with an abutment part that contacts the second shock absorber 6. The abutment part is an inclined surface 23. When the battery pack 10 is installed in the battery compartment 2, the inclined surface 23 is inclined in the first direction. When the battery pack 10 is installed in the battery compartment 2, the inclined surface 23 contacts the second shock absorber 6, so that the second shock absorber 6 can reduce the front-to-back vibration of the battery pack 10 in the first direction and the up-and-down vibration in the vertical direction.

[0041] The second shock absorber 6 is a cylindrical rubber column. The top of the battery compartment 2 is provided with a second groove 21. The rubber column is inserted into the second groove 21 and fixed, and partially protrudes from the second groove 21 to abut against the inclined surface 23 on the top of the battery pack 10. The second groove 21 is provided with a second slot 22 for the rubber column to protrude. The second slot 22 is oriented towards the side of the insertion port 3, so that the second slot 22 can face the inclined surface 23 on the battery pack 10, so that the inclined surface 23 of the battery pack 10 is more directly subjected to the elastic force of the second shock absorber 6. This structure enables the second shock absorber 6 to achieve the best shock absorption effect.

[0042] The cross-sectional shape of the second groove 21 is a circle of N quarters, where N is greater than 2 and less than 4, so that the width of the second slot 22 is less than the diameter of the second damping member 6. Preferably, the cross-sectional shape of the second groove 21 is a circle of two-thirds. This structure ensures that after the second damping member 6 is installed in the second groove 21, it will not come out of the second groove 21. The second damping member 6 is confined and fixed within the second groove 21. Due to its elasticity, the second damping member 6 can be installed into the second groove 21 through its own elastic deformation. The diameter of the second groove 21 can be the same as the diameter of the second damping member 6; or the diameter of the second damping member 6 can be slightly larger than the diameter of the second groove 21, so that when the second damping member 6 is installed in the second groove 21, the second damping member 6 and the inner wall of the second groove 21 are interference-fitted.

[0043] Preferably, the axial direction of the second damping element 6 is parallel to the inclined plane 23 to achieve the best damping effect.

[0044] Figure 2 , Figure 3 , Figure 5 As shown, the locking groove 7 is located on the top of the battery compartment 2, and the latch 13 extends from the top of the battery pack 10 and engages with the locking groove 7. Specifically, the latch 13 and the button 16 are connected by a connecting bracket 17. The latch 13, the connecting bracket 17, and the button 16 are movably mounted on the battery pack 10. The button 16 is located at the end of the connecting seat 11 away from the insertion interface 12. The battery pack 10 has a button opening 18 that exposes the button 16, and the connecting seat 11 has a latch opening 14 for the latch 13 to extend out. A return spring acts on the connecting bracket 17. When the button 16 is pressed by external force, the connecting bracket 17 drives the latch 13 to move down and retract into the latch opening 14, thus unlocking the device. When the button 16 loses force, the return spring drives the connecting bracket 17, the latch 13, and the button 16 to move up and reset, causing the latch 13 to move out of the latch opening 14. The connection structure of the battery pack 10 is the same as that of existing power tools, and can be found in patent CN201728641 U.

[0045] Preferably, there are two second shock absorbers 6, which are located on both sides of the locking groove 7. The locking groove 7 has second grooves 21 for installing the second shock absorbers 6 on both sides, so that the two second shock absorbers 6 can be supported more evenly on both sides of the battery pack 10.

[0046] The shock-absorbing structure of this battery pack can be applied to power tools such as electric hammers.

[0047] The above describes the battery pack shock absorption structure for power tools provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A battery pack shock-absorbing structure for power tools, comprising a housing and a battery pack, characterized in that, The housing has a battery compartment for installing a battery pack. One side of the battery compartment has an insertion port for inserting the battery pack. The inner walls on both sides of the battery compartment have guide ribs to guide the inserted battery pack. The top of the battery compartment has electrode inserts. The battery pack has two guide grooves that slide against the guide ribs on both sides, and electrode terminals that are electrically connected to the electrode inserts. The inserted battery pack is guided by the guide ribs to move along a first direction until it reaches the position where the electrode inserts and electrode terminals are electrically connected. At this position, the battery pack is completely contained within the battery compartment. The battery compartment has a locking groove. The battery pack has a latch that engages with the locking groove, a button for unlocking the latch, and a return spring. A first shock absorber is installed on the inner wall of the battery compartment opposite to the socket, and a second shock absorber is provided on the top of the battery compartment. The first and second shock absorbers are supported between the inner wall of the battery compartment and the battery pack to reduce the vibration transmitted to the battery pack.

2. The battery pack shock absorption structure for power tools according to claim 1, characterized in that, The top of the battery pack has an abutment portion that contacts the second shock absorber. The abutment portion is a slope, and when the battery pack is placed in the battery compartment, the slope is inclined in a first direction.

3. The battery pack shock absorption structure for power tools according to claim 1 or 2, characterized in that, The locking groove is located at the top of the battery compartment, and the latch extends from the top of the battery pack and engages with the locking groove. There are two second shock absorbers, which are located on both sides of the locking groove.

4. The battery pack shock absorption structure for power tools according to claim 1, characterized in that, The first shock absorber is a cylindrical rubber column. The inner wall of the battery compartment opposite to the socket is provided with a first groove. The rubber column is inserted into the first groove and fixed, and partially protrudes out of the first groove and abuts against the side of the battery pack. The first groove is provided with a first slot for the rubber column to protrude, and the first slot is directly opposite the socket.

5. The battery pack shock absorption structure for power tools according to claim 2, characterized in that, The second shock absorber is a cylindrical rubber column. The top of the battery compartment is provided with a second groove. The rubber column is inserted into the second groove and fixed, and partially protrudes from the second groove and abuts against the top of the battery pack. The second groove is provided with a second opening for the rubber column to protrude, and the second opening is oriented obliquely towards the insertion opening side.

6. The battery pack shock absorption structure for power tools according to claim 4, characterized in that, The cross-sectional shape of the first groove is a circle of N quarters, where N is greater than 2 and less than 4, so that the width of the first groove is less than the diameter of the first shock absorber.

7. The battery pack shock absorption structure for power tools according to claim 5, characterized in that, The cross-sectional shape of the second groove is a circle of N quarters, where N is greater than 2 and less than 4, so that the width of the second groove is less than the diameter of the second damping element.

8. The battery pack shock absorption structure for power tools according to claim 5, characterized in that, The axial direction of the second damping element is parallel to the inclined plane.

9. The battery pack shock absorption structure for power tools according to claim 1, characterized in that, The insertion port is located on one side along the length of the guide rib.

10. The battery pack shock absorption structure for power tools according to claim 1, characterized in that, An electrode holder is fixed on the top of the battery compartment, and electrode inserts are mounted on the electrode holder. A connecting seat is provided on the top of the battery pack, and guide grooves are provided on both sides of the connecting seat. One end of the connecting seat is provided with a plug interface for inserting the electrode inserts and making electrical connections with the electrode terminals.

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