A battery pack ejection mechanism

Abstract

The utility model provides a kind of battery pack ejection mechanism, belong to cleaning machine technical field.It solves the problem of the existing battery pack ejection mechanism large size, occupies battery compartment larger space and poor versatility.This battery pack ejection mechanism, including ejecting component, the ejecting component includes base, base has installation cavity in, the upper end of base has upper opening, lower end has lower opening, installation cavity is provided with top rod, the outer circumferential surface of top rod lower end has slider, the outer side wall of slider and the inner wall of installation cavity are slidingly engaged, the inner circumferential surface of base upper end has the upper limiting flange of preventing top rod from being taken out from base upward, the lower opening of base is detachably connected with baffle, installation cavity is provided with spring, the upper end of spring and top rod abut, lower end and baffle abut, the upper end of top rod passes through upper opening and extends outside base.This structure ejecting component is small and exquisite, will not occupy the space in battery compartment, suitable for the battery pack ejection of various electric tools.

Description

Technical Field

[0001] This utility model belongs to the field of cleaning machine technology, and in particular to a battery pack ejection mechanism. Background Technology

[0002] Currently, an increasing number of power tools use battery packs as their power source, freeing them from the constraints of cables and making them easier for operators to use in various work environments. To prevent the battery pack from slipping off the power tool during use, a locking mechanism is used to secure it. The process of removing the battery pack from a power tool involves first releasing the locking mechanism, and then pulling out the battery pack. For low-power power tools, which typically use smaller battery packs, the locking force is less, allowing the operator to easily release the lock and pull out the battery pack with one hand. However, for high-power power tools, the battery packs are generally larger and heavier. Removing the battery pack by hand without external force is often difficult and potentially dangerous, making it inconvenient for operators.

[0003] Currently, a battery pack ejection structure and an electric tool have been disclosed on the China Patent Network [Authorization Announcement No.: CN204711998U]. The ejection structure includes an electrode base and an elastic element. The electrode base has a mounting hole, and the elastic element is installed in the mounting hole. The fixed end of the elastic element is fixed to the electrode base, and the free end of the elastic element extends out of the mounting hole. The elastic element includes a fixed part and a spiral part. The spiral part is connected to the fixed part, with the fixed end located on the fixed part and the free end located on the spiral part. The fixed part is installed on the electrode base, and the spiral part is located in the mounting hole, with the free end of the spiral part extending out of the mounting hole. The elastic element pushes the battery pack away from the electrode base, causing the battery pack to separate from the ejection structure, achieving automatic ejection of the battery pack. This facilitates the operator in removing the battery pack, improves the efficiency of battery pack replacement, saves the operator's physical strength, and makes the tool more convenient to use.

[0004] The aforementioned battery pack ejection structure has the following drawbacks: First, the electrode holder is large in size, which takes up space in the battery compartment, thus reducing the installation space for the lithium battery pack and requiring a reduction in the size of the lithium battery pack, thereby reducing the power tool's range. Second, the battery pack ejection structure is a specially designed ejection structure based on the overall structure of the product or the battery compartment, which means that the ejection structures of multiple lithium battery products cannot be used interchangeably or are not well compatible. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a battery pack ejection mechanism. The technical problem to be solved by this utility model is: how to solve the problems of existing battery pack ejection mechanisms being large in size, occupying a large space in the battery compartment, and having poor versatility.

[0006] The objective of this utility model can be achieved through the following technical solutions: A battery pack ejection mechanism includes an ejection assembly, the ejection assembly including a base, the base having a mounting cavity, the upper end of the base having an upper opening and the lower end having a lower opening, characterized in that a push rod is disposed in the mounting cavity, the outer peripheral surface of the lower end of the push rod has a slider, the outer side wall of the slider is slidably engaged with the inner wall of the mounting cavity, the inner peripheral surface of the upper end of the base has an upper limit flange to prevent the push rod from dislodging upward from the base, a baffle is detachably connected to the lower opening of the base, a spring is disposed in the mounting cavity, the upper end of the spring abuts against the push rod and the lower end abuts against the baffle, and the upper end of the push rod extends out of the base through the upper opening.

[0007] During assembly of the push rod assembly, first insert the push rod into the base through the lower opening, then insert the spring into the base through the lower opening, and finally install the baffle at the lower opening position of the base. The upper end of the spring abuts against the push rod, and the lower end abuts against the baffle. Under the force of the spring, the push rod moves upward to its limit position, and the slider abuts against the upper limit flange. The upper end of the push rod extends out of the base through the upper opening. During assembly, several mounting holes for the ejector assembly are pre-set in the battery compartment. An ejector assembly is installed in each mounting hole. One end of the push rod of each ejector assembly extends into the battery compartment, and the bottom of the battery pack abuts against the end of the push rod, causing the push rod to move inward against the force of the spring. The spring is in a compressed state, and the outer wall of the slider slides against the inner wall of the mounting cavity, guiding the movement of the push rod and ensuring that the push rod can move along its axial direction without deviation. When the battery pack is unlocked, the push rod pushes the battery pack outward under the action of the spring. The ejector assembly has a compact structure and is embedded in the battery compartment, so it does not take up space in the battery compartment. The ejector assembly is easy to install, requiring only a mounting hole to be made in the battery compartment, making it suitable for ejecting battery packs from various power tools.

[0008] In the aforementioned battery pack ejection mechanism, the inner circumferential surface of the mounting cavity has a limiting rib arranged along the axial direction of the base, and the slider has a limiting groove, in which the limiting rib is embedded. The cooperation structure between the limiting groove and the limiting rib prevents the ejector rod from rotating circumferentially within the base, and also guides the movement of the ejector rod, ensuring stable movement of the ejector rod without deviation.

[0009] In the aforementioned battery pack ejection mechanism, there are several upper limit flanges, all of which are spaced apart circumferentially along the base. Each upper limit flange has a limiting rib below it. There are several sliders, and each slider corresponds one-to-one with each limiting rib. Each upper limit flange corresponds to one slider, forming a block for each slider to prevent the ejector rod from dislodging from the base.

[0010] In the aforementioned battery pack ejection mechanism, the inner circumferential surface of the lower end of the base has a lower limiting flange. Several lower limiting flanges are spaced apart circumferentially along the base, and a clearance groove is formed between adjacent lower limiting flanges. The lower end of the limiting rib is located above the clearance groove, allowing each slider to enter the mounting cavity through its corresponding clearance groove. The ejector rod is inserted into the base through the lower opening. The clearance groove allows the slider on the ejector rod to enter the base through the clearance groove. Simultaneously, the lower end of the limiting rib is located above the clearance groove. During the insertion of the ejector rod into the base, the slider's limiting groove mates with the limiting rib, facilitating the installation of the ejector rod.

[0011] In the aforementioned battery pack ejection mechanism, the outer circumferential surface of the baffle has several blocks, all spaced apart circumferentially along the baffle. Each block can enter the mounting cavity through a corresponding clearance groove. The lower surface of each block has a positioning rib, and the upper surface of the lower limiting flange has a positioning groove. The positioning rib of each block is embedded in the positioning groove of the corresponding lower limiting flange. During baffle assembly, the blocks are aligned with the clearance grooves, and then the baffle is moved so that the blocks enter the base through the clearance grooves. Next, the baffle is rotated so that each block is positioned above the corresponding lower limiting flange. Finally, the positioning ribs on each block are embedded in the corresponding positioning grooves. Under the action of the spring, the positioning ribs and positioning grooves are stably assembled, and the positioning ribs will not detach from the positioning grooves without external force.

[0012] In one of the battery pack ejection mechanisms described above, a handle is provided in the middle of the lower surface of the baffle. The handle is used to facilitate rotating the baffle.

[0013] In the aforementioned battery pack ejection mechanism, the upper surface of the baffle has a spring groove, the inner bottom surface of which has a spring post. The lower end face of the ejector rod has a spring groove, the inner bottom surface of which has a spring post. The lower end of the spring is located in the spring groove and is fitted onto the spring post, while the upper end of the spring is located in the spring groove and is fitted onto the spring post. The spring is stably installed within the base, ensuring stable force on the ejector rod.

[0014] In the aforementioned battery pack ejection mechanism, the mechanism includes a battery box containing a battery compartment. The bottom surface of the battery compartment has a mounting groove, and the inner circumferential surface of the upper end of the mounting groove has an annular snap-fit ​​groove. The outer circumferential surface of the upper end of the base has an annular snap-fit ​​rib. The base is located within the mounting groove, and the snap-fit ​​rib engages with the snap-fit ​​groove. The base snaps into the mounting groove, and the entire base is located within the mounting groove; only the ejector rod extends into the battery compartment, thus not occupying space within the battery compartment. The ejection assembly is easy to install within the battery compartment and is suitable for installation in the battery compartments of various power tools, improving versatility.

[0015] In the aforementioned battery pack ejection mechanism, there are multiple mounting slots, and each mounting slot is equipped with an ejection component. The arrangement of multiple ejection components facilitates the ejection of the battery pack.

[0016] Compared with the prior art, the battery pack ejection mechanism of this utility model has the following advantages: the ejection component has a compact structure and is embedded in the battery compartment, so it does not occupy the space inside the battery compartment. The ejection component is easy to install, and only requires opening an installation hole in the battery compartment, so that the ejection component can be used for ejecting battery packs of various power tools. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the battery box of this utility model.

[0018] Figure 2 This is a partial cross-sectional structural diagram of the present invention.

[0019] Figure 3 This is an exploded structural diagram of the ejection assembly of this utility model.

[0020] Figure 4 This is a three-dimensional structural diagram of the top rod of this utility model.

[0021] Figure 5 This is one of the three-dimensional structural diagrams of the base of this utility model.

[0022] Figure 6 This is the second three-dimensional structural diagram of the base of this utility model.

[0023] Figure 7 This is a three-dimensional structural diagram of the baffle of this utility model.

[0024] In the diagram: 1. Ejector assembly; 2. Base; 20. Mounting cavity; 21. Upper limit flange; 22. Limiting rib; 23. Lower limit flange; 24. Clearance groove; 25. Snap-fit ​​rib; 26. Positioning groove; 3. Ejector rod; 30. Slider; 31. Limiting groove; 32. Spring groove two; 33. Spring post two; 4. Baffle; 40. Stop block; 41. Positioning rib; 42. Handle; 43. Spring groove one; 44. Spring post one; 5. Spring; 6. Battery box; 60. Battery compartment; 61. Mounting groove; 62. Snap-fit ​​groove. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] like Figures 1 to 7As shown, the battery pack ejection mechanism includes an ejection assembly 1, which includes a base 2. The base 2 has a mounting cavity 20. The upper end of the base 2 has an upper opening, and the lower end has a lower opening. A push rod 3 is disposed in the mounting cavity 20. The outer peripheral surface of the lower end of the push rod 3 has a slider 30. The outer side wall of the slider 30 slides against the inner wall of the mounting cavity 20. The inner peripheral surface of the upper end of the base 2 has an upper limit flange 21 to prevent the push rod 3 from detaching from the base 2. A baffle 4 is detachably connected to the lower opening of the base 2. A spring 5 is disposed in the mounting cavity 20. The upper end of the spring 5 abuts against the push rod 3, and the lower end abuts against the baffle 4. The upper end of the push rod 3 extends out of the base 2 through the upper opening. The battery pack ejection mechanism also includes a battery box 6. The battery box 6 has a battery compartment 60. The bottom surface of the battery compartment 60 has a mounting groove 61. There are several mounting grooves 61, and each mounting groove 61 is provided with an ejection assembly 1. The inner circumferential surface of the upper end of the mounting groove 61 is provided with an annular snap-fit ​​groove 62, and the outer circumferential surface of the upper end of the base 2 is provided with an annular snap-fit ​​rib 25. The base 2 is located in the mounting groove 61 and the snap-fit ​​rib 25 snaps into the snap-fit ​​groove 62. When assembling the push rod assembly 1, the push rod 3 is first inserted into the base 2 through the lower opening of the base 2. Then, the spring 5 is inserted into the base 2 through the lower opening of the base 2. Finally, the baffle 4 is installed at the lower opening of the base 2. The upper end of the spring 5 abuts against the push rod 3 and the lower end abuts against the baffle 4. Under the action of the spring 5, the push rod 3 moves upward to the limit position. The slider 30 abuts against the upper limit flange 21. The upper end of the push rod 3 passes through the upper opening and extends out of the base 2. During assembly, several mounting slots 61 are pre-set within the battery compartment 60 for installing the ejector assembly 1. An ejector assembly 1 is installed in each mounting slot 61. One end of the ejector rod 3 of each ejector assembly 1 extends into the battery compartment 60, with the bottom of the battery pack pressing against the end of the ejector rod 3. This causes the ejector rod 3 to move inwards towards the base 2 against the force of the spring 5. The spring 5 is in a compressed state. The outer wall of the slider 30 slides against the inner wall of the mounting cavity 20, guiding the movement of the ejector rod 3 and ensuring that it moves axially without deviation. When the battery pack is unlocked, the ejector rod 3, under the action of the spring 5, ejects the battery pack outwards. The ejector assembly 1 has a compact structure and is embedded within the battery compartment 60, without occupying space within the battery compartment 60. Installation of the ejector assembly 1 is simple, requiring only a mounting hole to be made within the battery compartment 60. This makes the ejector assembly 1 suitable for ejecting battery packs from various power tools.

[0027] like Figure 3 , Figure 4 and Figure 5As shown, the inner circumferential surface of the mounting cavity 20 has limiting ribs 22 arranged along the axial direction of the base 2, and the slider 30 has a limiting groove 31, in which the limiting ribs 22 are embedded. The cooperation structure between the limiting groove 31 and the limiting ribs 22 prevents the push rod 3 from rotating circumferentially within the base 2, and also guides the movement of the push rod 3, ensuring stable movement of the push rod 3 without deviation. There are several upper limit flanges 21, all of which are spaced apart circumferentially along the base 2. Each upper limit flange 21 has a limiting rib 22 below it. There are several sliders 30, and each slider 30 corresponds one-to-one with each limiting rib 22.

[0028] like Figure 5 As shown, the inner circumferential surface of the lower end of the base 2 has a lower limiting flange 23. There are several lower limiting flanges 23, and all lower limiting flanges 23 are spaced apart along the circumference of the base 2. A relief groove 24 is formed between two adjacent lower limiting flanges 23. The lower end of the limiting rib 22 is located above the relief groove 24. Each slider 30 can enter the mounting cavity 20 through the corresponding relief groove 24. The push rod 3 is inserted into the base 2 through the lower opening of the base 2. The relief groove 24 allows the slider 30 on the push rod 3 to enter the base 2 through the relief groove 24. At the same time, the lower end of the limiting rib 22 is located above the relief groove 24. During the process of the push rod 3 being inserted into the base 2, the limiting groove 31 of the slider 30 is just assembled with the limiting rib 22, which facilitates the installation of the push rod 3.

[0029] like Figure 3 , Figure 6 and Figure 7 As shown, the outer circumferential surface of the baffle 4 has several blocks 40, all of which are spaced apart along the circumference of the baffle 4. Each block 40 can enter the mounting cavity 20 through the corresponding clearance groove 24. The lower surface of the block 40 has a positioning rib 41, and the upper surface of the lower limit flange 23 has a positioning groove 26. The positioning rib 41 of each block 40 is embedded in the positioning groove 26 of the corresponding lower limit flange 23. When assembling the baffle 4, the block 4 is aligned with the clearance groove 24, and then the baffle 4 is moved so that the block 40 enters the base 2 through the clearance groove 24. Then, the baffle is rotated so that each block 40 is above the corresponding lower limit flange 23. Finally, the positioning rib 41 on each block 40 is embedded in the corresponding positioning groove 26. Under the action of the spring 5, the positioning rib 41 and the positioning groove 26 are stably assembled and will not detach from the positioning groove 26 without external force.

[0030] like Figure 2As shown, the lower surface of the baffle 4 has a handle 42 in the middle, the upper surface of the baffle 4 has a spring groove 43, the inner bottom surface of the spring groove 43 has a spring post 44, the lower end surface of the push rod 3 has a spring groove 32, the inner bottom surface of the spring groove 32 has a spring post 33, the lower end of the spring 5 is located in the spring groove 43 and is sleeved on the spring post 44, and the upper end of the spring 5 is located in the spring groove 32 and is sleeved on the spring post 33. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A battery pack ejection mechanism, comprising an ejection assembly (1), the ejection assembly (1) comprising a base (2), the base (2) having a mounting cavity (20), the upper end of the base (2) having an upper opening and the lower end having a lower opening, characterized in that, A push rod (3) is provided in the mounting cavity (20). The outer peripheral surface of the lower end of the push rod (3) has a slider (30). The outer side wall of the slider (30) slides in cooperation with the inner wall of the mounting cavity (20). The inner peripheral surface of the upper end of the base (2) has an upper limit flange (21) to prevent the push rod (3) from coming off the base (2) upward. A baffle (4) is detachably connected to the lower opening of the base (2). A spring (5) is provided in the mounting cavity (20). The upper end of the spring (5) abuts against the push rod (3) and the lower end abuts against the baffle (4). The upper end of the push rod (3) extends out of the base (2) through the upper opening.

2. The battery pack ejection mechanism according to claim 1, characterized in that, The inner circumferential surface of the mounting cavity (20) has a limiting rib (22) arranged along the axial direction of the base (2), and the slider (30) has a limiting groove (31), and the limiting rib (22) is embedded in the limiting groove (31).

3. The battery pack ejection mechanism according to claim 2, characterized in that, There are several upper limit flanges (21), and all upper limit flanges (21) are spaced apart along the circumference of the base (2). Each upper limit flange (21) has a limiting rib (22) below it. There are several sliders (30), and all sliders (30) correspond one-to-one with all limiting ribs (22).

4. The battery pack ejection mechanism according to claim 2, characterized in that, The lower end of the base (2) has a lower limit flange (23) on its inner circumferential surface. There are several lower limit flanges (23). All lower limit flanges (23) are spaced apart along the circumferential direction of the base (2). A relief groove (24) is formed between two adjacent lower limit flanges (23). The lower end of the limiting rib (22) is located above the relief groove (24). Each slider (30) can enter the mounting cavity (20) through the corresponding relief groove (24).

5. A battery pack ejection mechanism according to claim 4, characterized in that, The outer peripheral surface of the baffle (4) has a stop block (40), and there are several stop blocks (40). All stop blocks (40) are arranged at intervals along the circumference of the baffle (4). Each stop block (40) can enter the mounting cavity (20) through the corresponding clearance groove (24). The lower surface of the stop block (40) has a positioning rib (41). The upper surface of the lower limit flange (23) is provided with a positioning groove (26). The positioning rib (41) of each stop block (40) is embedded in the positioning groove (26) of the corresponding lower limit flange (23).

6. A battery pack ejection mechanism according to claim 4, characterized in that, The baffle (4) has a handle (42) in the middle of its lower surface.

7. A battery pack ejection mechanism according to claim 1, characterized in that, The upper surface of the baffle (4) is provided with a spring groove (43), the inner bottom surface of the spring groove (43) is provided with a spring post (44), the lower end surface of the top rod (3) is provided with a spring groove (32), the inner bottom surface of the spring groove (32) is provided with a spring post (33), the lower end of the spring (5) is located in the spring groove (43) and is sleeved on the spring post (44), and the upper end of the spring (5) is located in the spring groove (32) and is sleeved on the spring post (33).

8. A battery pack ejection mechanism according to claim 1, characterized in that, The battery pack ejection mechanism includes a battery box (6), which has a battery compartment (60) inside. The bottom surface of the battery compartment (60) has a mounting groove (61). The inner circumferential surface of the upper end of the mounting groove (61) is provided with an annular snap-fit ​​groove (62). The outer circumferential surface of the upper end of the base (2) has an annular snap-fit ​​rib (25). The base (2) is located in the mounting groove (61) and the snap-fit ​​rib (25) snaps into the snap-fit ​​groove (62).

9. A battery pack ejection mechanism according to claim 8, characterized in that, The mounting slots (61) are multiple, and each mounting slot (61) is provided with an ejector assembly (1).

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