Electric hammer head shell

Abstract

The utility model provides a kind of electric hammer head shell, including oppositely arranged first shell and second shell, the first shell is connected with second shell between inserting limit piece, to make transmission shaft rotationally connected at limit piece, and first arc slot is opened in the first shell inside, second arc slot matched with first arc slot is opened in the second shell inside, to make first arc slot and second arc slot jointly enclose annular channel for accommodating output shaft when first shell and second shell are oppositely connected;The utility model can clearly observe electric hammer head structure, and it is convenient to replace and maintain the parts inside.

Description

Technical Field

[0001] This utility model relates to the field of electric hammers, and in particular to an electric hammer head housing. Background Technology

[0002] An electric hammer is a power tool that uses a motor to drive the rotating and impacting hammer attachments. It is used to drill holes in hard materials such as concrete, brick, and stone. Its head housing structure is used to enclose parts such as the output shaft and drive shaft, and to ensure the stable connection of each component under high-speed operation.

[0003] Currently, the head housing is usually a one-piece structure to ensure convenient processing and high structural strength. However, it has the drawback of being difficult to disassemble and repair after internal parts are damaged, and it is impossible to directly observe the internal structure, which affects the efficiency of troubleshooting. Utility Model Content

[0004] The purpose of this utility model is to provide a hammer head housing that allows for clear observation of the hammer head structure and facilitates the replacement and maintenance of its internal components.

[0005] To solve the above-mentioned technical problems, this utility model provides an electric hammer head housing, including a first housing and a second housing arranged opposite to each other. A limiting member is inserted between the first housing and the second housing so that the transmission shaft is rotatably connected to the limiting member. A first arc-shaped groove is formed on the inner side of the first housing, and a second arc-shaped groove matching the first arc-shaped groove is formed on the inner side of the second housing so that when the first housing and the second housing are connected opposite to each other, the first arc-shaped groove and the second arc-shaped groove together form an annular channel for accommodating the output shaft.

[0006] Furthermore, a first slot is provided inside the first housing, a second slot is provided on the side of the second housing, and positioning blocks are provided on both sides of the limiting member so that the positioning blocks can be inserted into the first slot or the second slot.

[0007] Furthermore, the first slot, the second slot, and the positioning block all have a cross-shaped structure.

[0008] Furthermore, the second housing has a number of first reinforcing ribs located on the side of the second slot, and the number of first reinforcing ribs are arranged at intervals along the axial direction of the drive shaft.

[0009] Furthermore, a support pile extends inside the first housing, and the first slot is formed at the support pile.

[0010] Furthermore, the limiting member has an opening on the side near the annular channel so that the connection position between the drive shaft and the output shaft is located at the opening.

[0011] Furthermore, the inner sides of the first and second arc-shaped grooves are provided with a plurality of second reinforcing ribs arranged alternately along the axial direction of the output shaft.

[0012] Furthermore, a limiting plate is provided on the inner side of the first housing, and a limiting groove for supporting the main shaft is formed between the limiting plate and the inner wall of the first housing. A first slot for engaging the drive shaft is formed on the side of the limiting plate facing the second housing, and a second slot matching the first slot is formed on the side of the second housing, so that the first slot and the second slot are aligned to form a locking structure for fixing the drive shaft.

[0013] The beneficial effects of this utility model are as follows: by connecting the first housing and the second housing together, and with the insertion and positioning of the limiting component, the initial positioning effect of the first housing and the second housing is improved. The output shaft is assembled in the annular channel formed between the first housing and the second housing to ensure the fit between the shafts and the stability of use. At the same time, due to the detachable design of the first housing and the second housing, it is extremely convenient to maintain and replace the components inside the housing, and the internal structure can be directly observed without having to remove all the components as in the existing one-piece head housing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the electric hammer of this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of the head housing of this utility model.

[0016] Figure 3 This is a schematic diagram of the cooperation between the first shell and the limiting member in this utility model.

[0017] Figure 4 This is a schematic diagram of the structure of the first shell in this utility model.

[0018] Figure 5 This is a schematic diagram of the cooperation between the second shell and the limiting member in this utility model.

[0019] Figure 6 This is a schematic diagram of the structure of the second shell in this utility model.

[0020] Reference numerals in the attached drawings: 1. First housing; 2. Second housing; 3. Limiting component; 4. First arc-shaped groove; 5. Second arc-shaped groove; 6. First slot; 7. Second slot; 8. Positioning block; 9. First reinforcing rib; 10. Support pile; 11. Opening; 12. Second reinforcing rib; 13. Limiting plate; 14. Limiting groove; 15. First slot; 16. Second slot. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0022] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0023] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0024] like Figures 1-6 The present invention provides a hammer drill head housing, including a first housing 1 and a second housing 2 disposed opposite to each other. A limiting member 3 is inserted between the first housing 1 and the second housing 2 so that the transmission shaft is rotatably connected to the limiting member 3. A first arc-shaped groove 4 is provided on the inner side of the first housing 1, and a second arc-shaped groove 5 matching the first arc-shaped groove 4 is provided on the inner side of the second housing 2 so that when the first housing 1 and the second housing 2 are connected opposite to each other, the first arc-shaped groove 4 and the second arc-shaped groove 5 together form an annular channel for accommodating the output shaft.

[0025] By connecting the first and second housings together and using the insertion and positioning of the limiting components, the initial positioning effect of the first and second housings is improved. The output shaft is assembled in the annular channel formed between the first and second housings to ensure the fit between the shafts and the stability of use. At the same time, due to the detachable design of the first and second housings, it is extremely convenient to maintain and replace the internal components, and the internal structure can be directly observed without having to remove all the components as with the existing one-piece head housing.

[0026] Both the first and second housings have matching bolt holes so that bolts can pass through the bolt holes to fasten the first and second housings together. The first and second arc-shaped grooves form a semi-circular structure so that after the first and second housings are connected, the first and second arc-shaped grooves form a complete annular channel.

[0027] Preferably, the first housing 1 has a first slot 6 inside, the second housing 2 has a second slot 7 on its side, and the limiting member 3 has positioning blocks 8 on both sides so that the positioning blocks 8 can be inserted into the first slot 6 or the second slot 7.

[0028] Specifically, when the first housing and the second housing are connected to each other, the limiting member is first inserted into the first slot or the second slot, and then the two slots cooperate with the positioning blocks on both sides of the limiting member to achieve pre-fixation. Then the first housing and the second housing are joined together to align the first arc groove with the second arc groove. Finally, the connection is fastened with bolts to ensure that the structure is stable and reliable and easy to assemble and disassemble.

[0029] Preferably, the first slot 6, the second slot 7, and the positioning block 8 are all cross-shaped. This allows the positioning block to engage with the slot, limiting the circumferential movement of the first and second housings and improving the accuracy of pre-fixing.

[0030] Preferably, the second housing 2 has a plurality of first reinforcing ribs 9 located on the side of the second slot 7, and the plurality of first reinforcing ribs 9 are arranged at intervals along the axial direction of the drive shaft.

[0031] Specifically, the circumferential structural strength of the drive shaft is increased by several second reinforcing ribs, which effectively disperses stress concentration and improves the connection stability of the second slot. By ensuring the stability of the limiting component, the smoothness and durability of the drive shaft under high-speed operation are ensured.

[0032] Preferably, a support post 10 is provided inside the first housing 1, and the first slot 6 is opened at the support post 10.

[0033] Specifically, by extending the first slot through the support pile, the mating position of the first slot and the second slot can be closer to the reinforcing rib of the second housing. This allows the drive shaft to be misaligned with the output shaft located in the middle of the housing when it is connected to the limiting component, thus avoiding structural interference or excessive size of the head housing caused by the drive shaft and the output shaft being located in the central area of ​​the housing at the same time.

[0034] Preferably, the limiting member 3 has an opening 11 on the side near the annular channel so that the connection position between the drive shaft and the output shaft is located at the opening 11.

[0035] Specifically, when the drive shaft is installed at the limiting component and the output shaft is located at the annular channel, the opening allows some of the gear teeth on the side of the drive shaft to be avoided, so that some of the gear teeth on the side of the drive shaft can be located outside the limiting component. At this time, the drive shaft and the output shaft can be meshed and connected to each other to ensure the stable transmission of both.

[0036] Preferably, the inner sides of the first arc-shaped groove 4 and the second arc-shaped groove 5 are provided with a plurality of second reinforcing ribs 12 arranged alternately along the axial direction of the output shaft.

[0037] Specifically, by arranging several second reinforcing ribs, the structural strength of the inner wall of the annular channel is enhanced, effectively improving the annular channel's resistance to deformation during output shaft operation and reducing fatigue damage caused by vibration, thus ensuring the stability of the output shaft during high torque transmission.

[0038] The second reinforcing rib can be arranged in a grid pattern.

[0039] Preferably, a limiting plate 13 is provided on the inner side of the first housing 1, and a limiting groove 14 for supporting the main shaft is formed between the limiting plate 13 and the inner wall of the first housing 1. A first slot 15 for engaging the drive shaft is formed on the side of the limiting plate 13 facing the second housing 2, and a second slot 16 matching the first slot 15 is formed on the side of the second housing 2, so that the first slot 15 and the second slot 16 are aligned to form a locking structure for fixing the drive shaft.

[0040] Specifically, the limiting plate supports the limiting groove and the first slot, the end of the main shaft is installed in the limiting groove, and one end of the transmission shaft is rotated and mounted between the first slot and the second slot, so that the transmission position of the main shaft and the transmission shaft can be positioned by the limiting plate, thereby ensuring the coaxiality of the transmission between the main shaft, the transmission shaft and the output shaft.

[0041] In this design, bearings are installed at the rotational engagement points of components such as the drive shaft, main shaft, output shaft, and housing.

[0042] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A hammer drill head housing, characterized in that: The device includes a first housing (1) and a second housing (2) arranged opposite to each other. A limiting member (3) is inserted between the first housing (1) and the second housing (2) so that the drive shaft is rotatably connected to the limiting member (3). A first arc-shaped groove (4) is provided on the inner side of the first housing (1), and a second arc-shaped groove (5) matching the first arc-shaped groove (4) is provided on the inner side of the second housing (2) so that when the first housing (1) and the second housing (2) are connected opposite to each other, the first arc-shaped groove (4) and the second arc-shaped groove (5) together form an annular channel for accommodating the output shaft.

2. The electric hammer head housing according to claim 1, characterized in that: The first housing (1) has a first slot (6) inside, the second housing (2) has a second slot (7) on its side, and the limiting member (3) has positioning blocks (8) on both sides so that the positioning blocks (8) can be inserted into the first slot (6) or the second slot (7).

3. The hammer head housing according to claim 2, characterized in that: The first slot (6), the second slot (7), and the positioning block (8) are all cross-shaped structures.

4. The hammer head housing according to claim 2, characterized in that: The second housing (2) has a number of first reinforcing ribs (9) located on the side of the second slot (7) inside, and the number of first reinforcing ribs (9) are arranged at intervals along the axial direction of the drive shaft.

5. The hammer head housing according to claim 2, characterized in that: The first housing (1) has a support pile (10) extending inside, and the first slot (6) is opened at the support pile (10).

6. The hammer head housing according to claim 1, characterized in that: The limiting member (3) has an opening (11) on the side near the annular channel so that the connection position between the transmission shaft and the output shaft is located at the opening (11).

7. The electric hammer head housing according to claim 1, characterized in that: The inner sides of the first arc groove (4) and the second arc groove (5) are provided with several second reinforcing ribs (12) arranged alternately along the axial direction of the output shaft.

8. The hammer head housing according to claim 1, characterized in that: The first housing (1) is provided with a limiting plate (13) on its inner side. A limiting groove (14) for supporting the main shaft is provided between the limiting plate (13) and the inner wall of the first housing (1). A first slot (15) for engaging the drive shaft is provided on the side of the limiting plate (13) facing the second housing (2). A second slot (16) matching the first slot (15) is provided on the side of the second housing (2) so that the first slot (15) and the second slot (16) are aligned to form a locking structure for fixing the drive shaft.

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