Multi-stage leakage-proof structure of electric hammer

Abstract

The utility model discloses a multi-stage leakage-proof structure of an electric hammer, and particularly belongs to the technical field of electric tools. Comprising a gearbox, a bevel gear is installed on the gearbox through a bearing, and lubricating grease is arranged in a cavity of the gearbox. A gasket is arranged between the bevel gear and the bearing, a sealing ring is arranged between the bearing and the gearbox, and a felt pad is arranged on the side, away from the cavity, of the bearing. According to the utility model, through the synergistic effect of three-stage sealing, the problem that the gearbox is easy to leak oil after the traditional electric hammer is used for a long time is systematically solved.

Description

Technical Field

[0001] This utility model belongs to the field of power tool technology, specifically to a multi-level leak-proof structure for an electric hammer. Background Technology

[0002] Existing lithium-ion electric hammer tools are prone to oil leakage from the gearbox after prolonged use. This leakage not only affects tool performance but also contaminates the working environment. Current leak-proof structures typically use a single sealing ring, but its sealing effect is limited and cannot completely prevent lubricant leakage from the gearbox. Furthermore, the high-speed rotation of the bevel gears during operation exacerbates the risk of lubricant leakage.

[0003] Currently, there are commercially available products that install single sealing rings (such as O-rings or rotary oil seals) at the bearing holes or gear mating points of electric hammers to achieve sealing through elastic compression or through the self-sealing function of the bearing. However, using a single sealing ring cannot cover the multiple paths of lubricating oil leakage, and the coaxiality deviation between the bearing and gear mating will also increase the gap between the sealing ring and the contact surface, causing oil leakage. Utility Model Content

[0004] In view of this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a multi-stage leak-proof structure for electric hammers. This application provides the following technical solution:

[0005] The device includes a gearbox, on which a bevel gear is mounted via a bearing. The cavity of the gearbox contains lubricating grease. A gasket is provided between the bevel gear and the bearing, and a sealing ring is provided between the bearing and the gearbox. A felt pad is provided on the side of the bearing away from the cavity.

[0006] A bowl-shaped stamping part is provided on the side of the bearing away from the cavity. The outer edge of the bowl-shaped stamping part is fixedly connected to the bearing, and the felt pad is adhered to the inside of the bowl-shaped stamping part.

[0007] The gasket is welded and fixed to the bearing. A groove is provided at the corresponding position of the bevel gear. The gasket is inserted into the groove and is in close contact with the end face of the bevel gear.

[0008] The sealing ring is made of high-temperature resistant material.

[0009] The bearing is a self-sealing bearing.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0011] 1. Significantly improves oil leakage prevention performance: By adopting a multi-stage sealing design and combining advanced sealing materials that are resistant to high temperatures and aging, this utility model effectively reduces the problem of multi-path leakage of lubricating oil and significantly improves the sealing performance of the electric hammer.

[0012] 2. Enhanced structural stability: Optimized design of key components (such as bearings, gears, and head housing) ensures coaxiality and fitting accuracy, effectively preventing oil leakage caused by component deformation or installation deviation, and enhancing the overall structural stability of the electric hammer.

[0013] 3. Improved operational efficiency and reduced costs: Reduced oil leakage decreases downtime and improves operational efficiency. Furthermore, the sealing ring of this invention has a long service life, is easy to maintain and replace, and reduces user maintenance costs.

[0014] 4. Environmentally friendly and sustainable: By effectively reducing oil leakage, this utility model reduces environmental pollution and is in line with environmental protection and sustainable development.

[0015] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a multi-stage leak-proof structure for an electric hammer.

[0018] Reference numerals: 1. Gearbox; 11. Chamber; 2. Bearing; 3. Bevel gear; 31. Groove; 4. Gasket; 5. Sealing ring; 6. Felt pad; 7. Cup-shaped stamped part. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] Please refer to Figure 1 As shown, this utility model provides a multi-stage leak-proof structure for an electric hammer, including a gearbox 1, a bevel gear 3 mounted on the gearbox 1 via a bearing 2, and a lubricating grease inside the chamber 11 of the gearbox 1; characterized in that: a gasket 4 is provided between the bevel gear 3 and the bearing 2, a sealing ring 5 is provided between the bearing 2 and the gearbox 1, and a felt pad 6 is provided on the side of the bearing 2 away from the chamber 11.

[0023] The bearing 2 is installed in the bearing mounting groove pre-set on the gearbox 1. The groove wall of the bearing mounting groove is provided with a sealing ring mounting groove. The sealing ring 5 is installed in the sealing ring mounting groove to seal the bearing 2 and the gearbox 1. The felt pad 6 can also be made of other highly absorbent materials for absorbing oil.

[0024] A bowl-shaped stamped part 7 is provided on the side of the bearing 2 away from the chamber 11. The outer edge of the bowl-shaped stamped part 7 is fixedly connected to the bearing 2, and the felt pad 6 is adhered to the inside of the bowl-shaped stamped part 7.

[0025] In one embodiment, the outer edge of the bowl-shaped stamped part 7 is fixedly connected to the outer ring bolt of the bearing 2; in another embodiment, the outer edge of the bowl-shaped stamped part 7 is spirally connected to the gear box 1, and the bearing 2 is located within the range of the outer edge of the bowl-shaped stamped part 7.

[0026] The gasket 4 is welded and fixed to the bearing 2. The bevel gear 3 has a groove 31 at the corresponding position. The gasket 4 is inserted into the groove 31 and is in close contact with the end face of the bevel gear 3.

[0027] The inner edge of the gasket 4 has a chamfer on the side near the end face of the bevel gear 3. The gasket 4 is welded to the inner ring of the bearing 2. The bevel gear 3 is pressed into the bearing 2 by a press. After the pressing is completed, the inner edge of the gasket 4 is inserted into the groove 31.

[0028] The sealing ring 5 is made of high-temperature resistant material.

[0029] Bearing 2 is a self-sealing bearing.

[0030] In practice, the bevel gear 3 operates normally under the drive of the motor. The chamber 11 contains lubricating oil to lubricate the bevel gear 3. One side of the gasket 4 is tightly attached to the end face of the bevel gear 3, and the other side is welded and sealed to the bearing 2 to seal the bevel gear 3 and the bearing 2. The sealing ring 5 is tightly attached to the bearing 2 and the gear box 1 respectively to seal the bearing 2 and the gear box 1. The bearing 2 is a self-sealing bearing, which seals the oil in the chamber 11 in all directions. Even if a small amount of oil leaks out, the oil flows through the inner wall of the bowl-shaped stamping part 7 and is guided to the felt pad 6, where it is absorbed.

[0031] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A multi-stage leakage-proof structure of an electric hammer, comprising a gear box (1), a bevel gear (3) being mounted on the gear box (1) through a bearing (2), and the gear box (1) having lubricating grease in a cavity (11) thereof; characterized in that: The bevel gear (3) is provided with a gasket (4) between the bearing (2), the bearing (2) is provided with a sealing ring (5) between the gear box (1), the side of the bearing (2) away from the chamber (11) is provided with a felt pad (6).

2. The multi-stage leakage prevention structure of an electric hammer as claimed in claim 1, wherein: The side of the bearing (2) away from the chamber (11) is provided with a bowl-shaped stamping part (7), the outer edge of the bowl-shaped stamping part (7) is fixedly connected with the bearing (2), and the felt pad (6) is adhered in the bowl-shaped stamping part (7).

3. The multi-stage leakage-preventing structure of an electric hammer as claimed in claim 1, wherein: The gasket (4) is welded and fixed on the bearing (2), the bevel gear (3) is provided with a groove (31) at the corresponding position, the gasket (4) is clamped into the groove (31) and tightly abuts against the end face of the bevel gear (3).

4. The multi-stage leakage preventing structure of an electric hammer as claimed in claim 1, wherein: The sealing ring (5) is made of high-temperature-resistant material.

5. The multi-stage leakage-preventing structure of an electric hammer as claimed in claim 1, wherein: The bearing (2) is a self-sealing bearing.

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