Main shaft sleeve based on electric hammer

Abstract

The utility model relates to a main shaft sleeve based on an electric hammer, which belongs to the technical field of electric hammer accessories and comprises a motor mounting ferrule, a bearing mounting sleeve, a heat dissipation connecting part, a shaft sleeve connecting part and a tail end connecting sleeve, one end of the motor mounting ferrule is integrally connected with the bearing mounting sleeve, and two ends of the heat dissipation connecting part are respectively connected with the bearing mounting sleeve and the shaft sleeve connecting part. The positioning mechanism is composed of the positioning rod base, the positioning connecting rod, the clamping connector and the connecting spring section, the positioning rod base is welded to the outer ring of the shaft sleeve connecting part, the positioning connecting rod is movably arranged with the positioning rod base through the overturning connecting part, and the clamping connector is clamped to the clamping connector. The clamping connector is integrally arranged on the rod head portion of the positioning connecting rod, after installation, connection with an electric hammer shell is achieved through the unfolded clamping connector of the positioning connecting rod, so that structures such as a motor installation ferrule have good stability after installation, and the sleeve can be prevented from rotating in the using process.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric hammer accessories and relates to a main shaft sleeve based on an electric hammer. Background Art

[0002] The electric hammer is an electric rotary hammer drill with a safety clutch and a pneumatic hammer mechanism. The electric hammer uses the principle of piston movement to compress the gas to impact the drill bit. It does not require much hand strength and can open 6-100mm holes in hard materials such as concrete, bricks, and stones. The electric hammer has a high hole-opening efficiency in the above materials, but it cannot open holes in metals; Patent No. CN202222630746.3 provides an adjustable spindle sleeve, which relates to the technical field of spindle sleeves. The advantage of this technical solution is that when the spindle is fully inserted into the sleeve assembly, the reset spring and the sleeve will clamp the spindle. In this new model, the sleeve assembly is used to clamp spindles of different diameters, which solves the problem that the sleeve in the comparative document can only clamp spindles of one size due to different size changes, and the practicality is low.

[0003] The disadvantage of the above-disclosed spindle sleeve is that the sleeve itself lacks a positioning mechanism during installation, which causes the sleeve to easily shake when in use. For this reason, we design a spindle sleeve based on an electric hammer. Summary of the invention

[0004] The purpose of the utility model is to provide a main shaft sleeve based on an electric hammer to solve the problems raised in the above background technology.

[0005] The purpose of the utility model can be achieved through the following technical solutions: based on the main shaft sleeve of the electric hammer, it includes a motor mounting ring, a bearing mounting sleeve, a heat dissipation connection part, a shaft sleeve connection part and a tail end connection sleeve, one end of the motor mounting ring is integrally connected with the bearing mounting sleeve, the two ends of the heat dissipation connection part are respectively connected with the bearing mounting sleeve and the shaft sleeve connection part, one end of the shaft sleeve connection part is integrally connected with the tail end connection sleeve, and a positioning mechanism is provided at the outer ring of the shaft sleeve connection part;

[0006] The positioning mechanism consists of a positioning rod seat, a positioning connecting rod, a snap-fit ​​connector and a connecting spring segment. The positioning rod seat is welded at the outer ring of the sleeve connecting part. A flip connecting part is arranged in the middle of the positioning rod seat. The positioning connecting rod is movably arranged with the positioning rod seat through the flip connecting part. The snap-fit ​​connector is integrally arranged at the rod head of the positioning connecting rod. The bottom of the positioning connecting rod is connected to the connecting spring segment, and the connecting spring segment is connected to the sleeve connecting part.

[0007] In the above-mentioned spindle sleeve based on electric hammer, a limiting mechanism is arranged at the outer ring of the motor mounting ring, and the limiting mechanism includes a limiting sleeve, a telescopic connecting rod, and a soft gasket. A sleeve mounting hole is opened at the outer ring of the motor mounting ring, and the limiting sleeve is welded and arranged at the sleeve mounting hole. The telescopic connecting rod is arranged inside the limiting sleeve and the movable end of the telescopic connecting rod extends to the inner side of the motor mounting ring. The soft gasket is arranged at the movable end of the telescopic connecting rod and fits with the inner wall of the motor mounting ring. The purpose of such arrangement is to facilitate the pre-determination of the internal space of the motor mounting ring, so that when the bearing is installed inside the bearing mounting sleeve, the distance between the bearing and the inner wall of the motor mounting ring can be effectively reduced through the soft gasket, thereby improving the firmness of the embedded installation of the bearing.

[0008] In the spindle sleeve based on the electric hammer, a plurality of annular heat dissipation holes are arranged at the outer ring of the heat dissipation connection part, so as to achieve a good heat dissipation effect, increase the contact area with the air part, and enable the heat to be quickly conducted.

[0009] In the spindle sleeve based on the electric hammer, the other end of the motor mounting ring is provided with a mounting collar, and one end of the mounting collar is provided with a sealing ring connection portion. The purpose of such a setting is to facilitate better connection with the output shaft end of the motor and improve the sealing performance of the connection with the output shaft end of the motor.

[0010] In the spindle sleeve based on the electric hammer, a plug-in connection part is provided at the outer ring of the tail end connection sleeve, and one end of the plug-in connection part extends to the outer surface of the sleeve connection part. The purpose of this arrangement is to facilitate better connection to the connection part of the drill bit, so as to improve the firmness of the overall installation.

[0011] In the above-mentioned spindle sleeve based on the electric hammer, the two ends of the heat dissipation connection part are connected by clamping flanges with the ends of the bearing mounting sleeve and the ends of the sleeve connection part, and the heat dissipation connection part is an aluminum alloy sleeve structure. The purpose of this arrangement is to make the heat dissipation connection part have good heat dissipation efficiency and improve its own heat conduction efficiency.

[0012] Compared with the prior art, the utility model has the following advantages based on the main shaft sleeve of the electric hammer: through the positioning mechanism composed of the positioning rod seat, the positioning connecting rod, the clamping connector and the connecting spring segment, the positioning rod seat is welded and arranged at the outer ring of the shaft sleeve connecting part, the positioning connecting rod is movably arranged with the positioning rod seat through the flip connecting part, the clamping connector is integrally arranged at the rod head of the positioning connecting rod, and after installation, the clamping connector of the positioning connecting rod is unfolded to realize the connection with the electric hammer housing, so that the motor mounting ring and other structures have good stability after installation, and can prevent the sleeve from rotating during use; by setting the heat dissipation connecting part, The two ends of the heat dissipation connection part are clamped and connected with the end of the bearing mounting sleeve and the end of the shaft sleeve connection part through the clamping flange, and a plurality of annular heat dissipation holes are arranged at the outer ring part of the heat dissipation connection part; it has a good heat dissipation effect, increases the contact area with the air part, and enables heat to be quickly conducted; by setting a limiting mechanism including a limiting sleeve, a telescopic connecting rod, a soft gasket and other structures, it is convenient to pre-determine the internal space of the motor mounting ring, so that when the bearing is installed inside the bearing mounting sleeve, the distance between the bearing and the inner wall of the motor mounting ring can be effectively reduced through the soft gasket, thereby improving the firmness of the bearing embedded installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of a main shaft sleeve based on an electric hammer of the utility model.

[0014] Figure 2 The utility model is a schematic diagram of the composition structure of the main shaft sleeve positioning mechanism based on the electric hammer.

[0015] Figure 3 The utility model is a three-dimensional structural schematic diagram of a main shaft sleeve limiting mechanism based on an electric hammer.

[0016] In the figure, 1. motor mounting ring; 2. bearing mounting sleeve; 3. heat dissipation connection; 4. shaft sleeve connection; 5. tail end connection sleeve; 6. insert strip connection; 7. mounting ring; 8. sealing ring connection; 9. heat dissipation hole; 10. positioning rod seat; 11. positioning connecting rod; 12. flip connection; 13. snap-on connector; 14. connecting spring segment; 15. sleeve mounting hole; 16. limiting sleeve; 17. telescopic connecting rod; 18. soft gasket. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] like Figure 1 , Figure 2 and Figure 3 As shown, the utility model is based on the main shaft sleeve of the electric hammer;

[0019] Embodiment: The sleeve of the technical solution includes a motor mounting ring 1, a bearing mounting sleeve 2, a heat dissipation connection part 3, a sleeve connection part 4 and a tail end connection sleeve 5, one end of the motor mounting ring 1 is integrally connected with the bearing mounting sleeve 2, two ends of the heat dissipation connection part 3 are respectively connected with the bearing mounting sleeve 2 and the sleeve connection part 4, one end of the sleeve connection part 4 is integrally connected with the tail end connection sleeve 5, and a positioning mechanism is provided at the outer ring of the sleeve connection part 4;

[0020] The positioning mechanism consists of a positioning rod seat 10, a positioning connecting rod 11, a snap-fit ​​connector 13 and a connecting spring segment 14. The positioning rod seat 10 is welded and arranged at the outer ring of the sleeve connecting part 4. A flip connecting part 12 is arranged in the middle of the positioning rod seat 10. The positioning connecting rod 11 is movably arranged with the positioning rod seat 10 through the flip connecting part 12. The snap-fit ​​connector 13 is integrally arranged at the rod head of the positioning connecting rod 11. The bottom of the positioning connecting rod 11 is connected to the connecting spring segment 14, and the connecting spring segment 14 is connected to the sleeve connecting part 4.

[0021] In this embodiment, if Figure 3 As shown, in order to ensure the firmness of the bearing installation and prevent the bearing from being delivered or not embedded in place after installation, a limiting mechanism is arranged at the outer ring of the motor mounting ring 1, and the limiting mechanism includes a limiting sleeve 16, a telescopic connecting rod 17, and a soft gasket 18. A sleeve mounting hole 15 is opened at the outer ring of the motor mounting ring 1, and the limiting sleeve 16 is welded and arranged at the sleeve mounting hole 15. The telescopic connecting rod 17 is arranged inside the limiting sleeve 16 and the movable end of the telescopic connecting rod 17 extends to the inner side of the motor mounting ring 1, and the soft gasket 18 is arranged at the movable end of the telescopic connecting rod 17 and fits with the inner wall of the motor mounting ring 1.

[0022] In this embodiment, if Figure 3 As shown, in order to better conduct heat so that the heat generated by the main shaft during rotation can be dissipated, a plurality of annularly distributed heat dissipation holes 9 are provided at the outer ring of the heat dissipation connection part 3; the two ends of the heat dissipation connection part 3 are clamped and connected with the end of the bearing mounting sleeve 2 and the end of the shaft sleeve connection part 4 through the clamping flange, and the heat dissipation connection part 3 is an aluminum alloy sleeve structure.

[0023] In this embodiment, if Figure 1 As shown, in order to better connect the output shaft end of the motor and improve the connection sealing with the output shaft end of the motor, a mounting ring 7 is provided at the other end of the motor mounting ring 1, and a sealing ring connecting part 8 is provided at one end of the mounting ring 7.

[0024] In this embodiment, if Figure 1As shown, in order to better connect to the connection part of the drill bit and improve the firmness of the overall installation, a plug-in connection part 6 is provided at the outer ring of the tail end connecting sleeve 5, and one end of the plug-in connection part 6 extends to the outer surface of the shaft sleeve connecting part 4.

[0025] Working principle: The main structure of the sleeve protects the motor mounting ring 1, the bearing mounting sleeve 2, the heat dissipation connection part 3, the sleeve connection part 4 and the tail end connection sleeve 5, wherein one end of the motor mounting ring 1 is integrally connected with the bearing mounting sleeve 2, and the two ends of the heat dissipation connection part 3 are clamped and connected with the end of the bearing mounting sleeve 2 and the end of the sleeve connection part 4 through the clamping flange, one end of the sleeve connection part 4 is integrally connected with the tail end connection sleeve 5, and a positioning mechanism is arranged at the outer ring of the sleeve connection part 4; the positioning mechanism is composed of a positioning rod seat 10, a positioning connecting rod 11, a clamping connector 13 and a connecting spring segment 14, and after installation, the clamping connector 13 of the unfolded positioning connecting rod 11 is used to realize the connection with the electric hammer housing, so that the sleeve and other structures have good stability after installation, and can prevent the sleeve from rotating during use.

[0026] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The specific embodiments described in this article are only used to illustrate the spirit of the utility model. The technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar way, but they will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

Claims

1. A main shaft sleeve based on an electric hammer, comprising a motor mounting ring (1), a bearing mounting sleeve (2), a heat dissipation connection part (3), a shaft sleeve connection part (4) and a tail end connection sleeve (5), characterized in that: One end of the motor mounting ring (1) is integrally connected to the bearing mounting sleeve (2), two ends of the heat dissipation connection part (3) are respectively connected to the bearing mounting sleeve (2) and the shaft sleeve connection part (4), one end of the shaft sleeve connection part (4) is integrally connected to the tail end connection sleeve (5), and a positioning mechanism is provided at the outer ring of the shaft sleeve connection part (4); The positioning mechanism consists of a positioning rod seat (10), a positioning connecting rod (11), a snap-fit ​​connector (13) and a connecting spring segment (14); the positioning rod seat (10) is welded and arranged at the outer ring of the shaft sleeve connecting part (4); a flip connecting part (12) is arranged in the middle of the positioning rod seat (10); the positioning connecting rod (11) is movably arranged with the positioning rod seat (10) through the flip connecting part (12); the snap-fit ​​connector (13) is integrally arranged at the rod head of the positioning connecting rod (11); the bottom of the positioning connecting rod (11) is connected to the connecting spring segment (14); and the connecting spring segment (14) is connected to the shaft sleeve connecting part (4).

2. The spindle sleeve based on the electric hammer according to claim 1, characterized in that: A limiting mechanism is arranged at the outer ring of the motor mounting ring (1), and the limiting mechanism comprises a limiting sleeve (16), a telescopic connecting rod (17), and a soft gasket (18). A sleeve mounting hole (15) is opened at the outer ring of the motor mounting ring (1), and the limiting sleeve (16) is welded and arranged at the sleeve mounting hole (15). The telescopic connecting rod (17) is arranged inside the limiting sleeve (16) and the movable end of the telescopic connecting rod (17) extends to the inner side of the motor mounting ring (1). The soft gasket (18) is arranged at the movable end of the telescopic connecting rod (17) and fits with the inner wall of the motor mounting ring (1).

3. The spindle sleeve based on electric hammer according to claim 1, characterized in that: A plurality of heat dissipation holes (9) distributed in an annular pattern are provided at the outer ring portion of the heat dissipation connection portion (3).

4. The spindle sleeve based on electric hammer according to claim 1, characterized in that: The other end of the motor mounting ring (1) is provided with a mounting ring (7), and one end of the mounting ring (7) is provided with a sealing ring connecting portion (8).

5. The spindle sleeve based on electric hammer according to claim 1, characterized in that: An insert rod connection portion (6) is provided at the outer ring of the tail end connection sleeve (5), and one end of the insert rod connection portion (6) extends to the outer surface of the shaft sleeve connection portion (4).

6. The spindle sleeve based on electric hammer according to claim 1, characterized in that: The two ends of the heat dissipation connection part (3) are clamped and connected to the end of the bearing mounting sleeve (2) and the end of the shaft sleeve connection part (4) through clamping flanges, and the heat dissipation connection part (3) is an aluminum alloy sleeve structure.

Images