Automatic lubricating structure of handheld electric tool
By incorporating ball bearings, buffer components, and sealing mechanisms in the automatic lubrication structure, the problems of insufficient lubrication and excessive oil leakage in handheld power tools are solved, achieving stable and timely lubrication of the drive shaft and system cleanliness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-11
- Publication Date
- 2026-04-03
AI Technical Summary
Traditional handheld power tools suffer from insufficient lubrication and are prone to excessive oil leakage, leading to shaft wear or environmental pollution.
An automatic lubrication structure was designed, including a lubrication mechanism and a sealing mechanism. It utilizes balls to automatically apply lubricating oil when the drive shaft rotates, and uses a buffer component to offset vibration and impact forces. Combined with a sealing flip cover and an elastic sealing block, it prevents oil leakage and impurities from entering.
It achieves timely automatic lubrication of the drive shaft, controls the amount of oil used, avoids wear and contamination, ensures the stability and cleanliness of the lubrication system, and reduces lubrication abnormalities and oil leaks caused by vibration.
Smart Images
Figure CN224079961U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power tool technology, and in particular to an automatic lubrication structure for a handheld power tool. Background Technology
[0002] Handheld power tools are portable power tools that are typically powered by batteries or other portable power sources and are designed to be operated by hand, making them suitable for a variety of different applications and working environments.
[0003] In existing technologies, traditional hand tools, such as impact drills, rely on manual lubrication or fixed oil chambers, which can easily lead to untimely lubrication, resulting in problems such as shaft wear or excessive oil leakage that pollutes the environment.
[0004] To address this, an automatic lubrication structure for handheld power tools is proposed. Utility Model Content
[0005] The purpose of this invention is to provide an automatic lubrication structure for handheld power tools, which can solve the problems of insufficient lubrication and waste in existing lubrication systems.
[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic lubrication structure for a handheld power tool, comprising a tool housing, a drive shaft movably connected to the bottom of the tool housing, an impact drill movably connected to the bottom of the drive shaft, a lubrication mechanism movably connected to the outside of the drive shaft, and a sealing mechanism movably connected to the outside of the lubrication mechanism.
[0007] The lubrication mechanism includes a support box disposed on the outside of the drive shaft. An oil reservoir ring is fixedly connected to the inner side of the support box. A support half-ring is fixedly connected to the side of the oil reservoir ring away from the support box. Oil holes are opened on the corresponding sides of the support half-ring and the oil reservoir ring. A rotating ring frame is fixedly connected to the inner side of the support half-ring. A ball bearing is rotatably connected to the outer side of the rotating ring frame. The ball bearing is disposed inside the oil hole. A buffer assembly is movably connected to the top of the support box. The buffer assembly is movably connected to the outside of the tool housing.
[0008] Preferably, the sealing mechanism includes an oil replenishment port fixedly connected to the outside of the oil reservoir ring, and the oil replenishment port is movably connected to the outside of the support box.
[0009] Preferably, a sealing flap is rotatably connected to the top of the oil filling port, and an elastic sealing block is fixedly connected to the bottom of the sealing flap. A sealing groove is provided on the top of the oil filling port, and the elastic sealing block is movably connected to the inner side of the sealing groove.
[0010] Preferably, a torsion spring is fixedly connected to the outer side of the sealing flip cover, and the torsion spring is fixedly connected to the outer side of the oil filling port.
[0011] Preferably, the buffer assembly includes lifting guide rails fixedly connected to both sides of the tool housing, and a bearing block is slidably connected to the bottom of the inner side of the lifting guide rail, the bearing block being fixedly connected to both sides of the support box.
[0012] Preferably, a force-shaping block is slidably connected to the inner side of the lifting guide rail. The force-shaping block is disposed on the top of the bearing block. A first telescopic column is fixedly connected to the side of the bearing block and the force-shaping block corresponding to each other. A second telescopic column is fixedly connected to the side of the force-shaping block away from the bearing block. The second telescopic column is fixedly connected to the top of the inner side of the lifting guide rail. A first compression spring is fixedly connected to the inner side of both the first and second telescopic columns. A telescopic pull rod is rotatably connected to the outer side of the force-shaping block. The telescopic pull rod is rotatably connected to the top of the bearing block. A second compression spring is fixedly connected to the outer side of the telescopic pull rod.
[0013] Preferably, the bottom of the sealing flip cover is fixedly connected with an adhesive sheet.
[0014] Preferably, a ceramic sleeve is fixedly connected to the outer side of the ball.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] 1. This application, by setting up a lubrication mechanism, can automatically and evenly apply the lubricating oil in the oil reservoir ring to the outside of the drive shaft when the drive shaft rotates, using the rotation of the ball bearings. This achieves timely and automatic lubrication during operation. Furthermore, the ball bearings can effectively control the amount of oil used by blocking the oil holes, avoiding excessive oil leakage and environmental pollution. At the same time, the support box, through a multi-directional buffer structure composed of lifting guide rails, telescopic columns, and compression springs, can effectively offset the impact force of operational vibrations and ensure the stability of the internal lubrication structure. It mainly achieves timely lubrication by replacing manual oil replenishment with automatic application, avoiding shaft wear due to untimely lubrication. The ball bearings control the amount of oil, solving the problem of excessive oil leakage in the fixed oil chamber. The buffer structure ensures the stability of the lubrication structure, further reducing lubrication abnormalities and oil leakage caused by vibration.
[0017] 2. By setting up a sealing mechanism, this application can reduce oil leakage and the introduction of external impurities during oil replenishment. The sealing flip cover, combined with a torsion spring and an elastic sealing block, can quickly close after oil replenishment by utilizing the elastic potential energy of the torsion spring. Through the tight engagement of the elastic sealing block and the sealing groove, the exposure time of the oil replenishment port is significantly shortened, effectively preventing dust and impurities from entering the oil replenishment channel, ensuring the cleanliness of the internal lubrication system, preventing impurities from entering the lubrication structure during oil replenishment, avoiding the blockage of oil holes or aggravation of drive shaft wear due to impurities, and further ensuring the long-term stability and reliability of the automatic lubrication system. Attached Figure Description
[0018] Figure 1 This is an overall structural diagram of the automatic lubrication structure of the handheld power tool of this utility model;
[0019] Figure 2 This is a partial structural diagram of the automatic lubrication structure of the handheld power tool of this utility model;
[0020] Figure 3 This is an overall structural diagram of the lubrication mechanism of this utility model;
[0021] Figure 4 This is an overall structural diagram of the buffer assembly of this utility model;
[0022] Figure 5 This is an overall structural diagram of the sealing mechanism of this utility model.
[0023] In the diagram, 1. Tool housing; 2. Drive shaft; 3. Impact drill; 4. Lubrication mechanism; 41. Support box; 42. Oil reservoir ring; 43. Support half ring; 44. Oil hole; 45. Rotating ring frame; 46. Ball bearing; 47. Buffer assembly; 47a. Lifting guide rail; 47b. Bearing block; 47c. Force distribution block; 47d. First telescopic column; 47e. Second telescopic column; 47f. First compression spring; 47g. Telescopic pull rod; 47h. Second compression spring; 5. Sealing mechanism; 51. Oil replenishment port; 52. Sealing flip cover; 53. Elastic sealing block; 54. Sealing groove; 55. Torsion spring; 6. Adhesive sheet; 7. Ceramic sleeve. Detailed Implementation
[0024] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figure 1-5 The present invention provides the following technical solution:
[0026] An automatic lubrication structure for a handheld power tool includes a tool housing 1, a drive shaft 2 movably connected to the bottom of the tool housing 1, an impact drill 3 movably connected to the bottom of the drive shaft 2, a lubrication mechanism 4 movably connected to the outside of the drive shaft 2, and a sealing mechanism 5 movably connected to the outside of the lubrication mechanism 4.
[0027] The lubrication mechanism 4 includes a support box 41 located outside the drive shaft 2. An oil reservoir ring 42 is fixedly connected to the inner side of the support box 41. A support half-ring 43 is fixedly connected to the side of the oil reservoir ring 42 away from the support box 41. Oil holes 44 are provided on the corresponding sides of the support half-ring 43 and the oil reservoir ring 42. A rotating ring frame 45 is fixedly connected to the inner side of the support half-ring 43. A ball bearing 46 is rotatably connected to the outer side of the rotating ring frame 45. The ball bearing 46 is located inside the oil hole 44. A buffer assembly 47 is movably connected to the top of the support box 41. The buffer assembly 47 is movably connected to the outer side of the tool housing 1.
[0028] In this embodiment: When using a handheld power tool such as an electric impact drill 3, which consists of a tool housing 1, a drive shaft 2, and an impact drill 3, the drive shaft 2 is an extension of the internal drive structure of the tool housing 1, mainly used to drive the outer impact drill 3. A support box 41, which provides lubrication and support, is provided on the outer side of the drive shaft 2. Multiple sets of oil reservoir rings 42 are fixedly connected to the inner wall of the support box 41 from top to bottom. Each oil reservoir ring 42 has a support half-ring 43 connected to its inner side near the support box 41. Oil holes 44 are opened at positions corresponding to the oil reservoir rings 42 to facilitate the transfer of lubricating oil from the oil reservoir rings 42 to the support half-ring 43. Multiple rotating ring frames 45 are distributed in a ring array inside the support half-ring 43. Each pair of rotating ring frames 45 has... The drive shaft 2 is rotatably connected to a ball bearing 46 with an external ceramic sleeve 7. Each ball bearing 46 has an oil hole 44 blocked on its side, so that the side of the ball bearing 46 blocking the oil hole 44 can contact and adhere to the lubricating oil, while the other side contacts the outer wall of the drive shaft 2. When the drive shaft 2 rotates around its axis, it will drive multiple balls bearing 46 in the support box 41 to rotate on the rotating ring frame 45, switching their contact surfaces with the oil hole 44. When the side that was originally in contact with the oil flips to contact the outer wall of the drive shaft 2, the lubricating oil will be evenly applied to the outside of the drive shaft 2 through the adhesion of multiple sets of balls bearing 46, realizing timely automatic lubrication during operation, while effectively controlling the amount of oil used. In addition, the buffer component 47 can reduce vibration during operation and prevent damage to the support box 41 and its internal structure.
[0029] Specifically, such as Figure 1 , Figure 2 , Figure 5 As shown, the sealing mechanism 5 includes an oil replenishment port 51 fixedly connected to the outside of the oil storage ring 42, and the oil replenishment port 51 is movably connected to the outside of the support box 41.
[0030] Specifically, such as Figure 1 , Figure 2 , Figure 5 As shown, a sealing flap 52 is rotatably connected to the top of the oil filling port 51, and an elastic sealing block 53 is fixedly connected to the bottom of the sealing flap 52. A sealing groove 54 is opened on the top of the oil filling port 51, and the elastic sealing block 53 is movably connected to the inner side of the sealing groove 54.
[0031] Specifically, such as Figure 1 , Figure 2 , Figure 5 As shown, a torsion spring 55 is fixedly connected to the outside of the sealing flip cover 52, and the torsion spring 55 is fixedly connected to the outside of the oil filling port 51.
[0032] In this embodiment: After the processing is completed, each oil storage ring 42 can be individually replenished with oil through the oil replenishment port 51 using a specially designed narrow-mouth oil replenishment device. To prevent a large amount of dust and impurities from accumulating inside the oil replenishment port 51, a sealing flip cover 52 is provided at the top of the oil replenishment port 51. This flip cover is rotatably connected to the top of the oil replenishment port 51 and is engaged with the top of the oil replenishment port 51 by an elastic sealing block 53. When oil replenishment is required, the sealing flip cover 52 is rotated, and the narrow mouth is inserted into the oil replenishment port 51 for oil replenishment. After oil replenishment is completed, the oil replenishment device is directly pulled out from the oil replenishment port 51. Since the torsion spring 55 at the rotation point of the sealing flip cover 52 will be tightened and generate elastic potential energy when the sealing flip cover 52 is opened, the sealing flip cover 52 will quickly rotate and close under the action of elastic potential energy after the device is pulled out, so that the elastic sealing block 53 is squeezed and locked into the sealing groove 54, thereby reducing the opening time.
[0033] Specifically, such as Figure 3 , Figure 4 As shown, the buffer assembly 47 includes lifting guide rails 47a fixedly connected to both sides of the tool housing 1, and a bearing block 47b slidably connected to the bottom of the inner side of the lifting guide rail 47a. The bearing block 47b is fixedly connected to both sides of the support box 41.
[0034] Specifically, such as Figure 3 , Figure 4 As shown, a force-sharing block 47c is slidably connected to the inner side of the lifting guide rail 47a. The force-sharing block 47c is located on the top of the bearing block 47b. A first telescopic column 47d is fixedly connected to the side of the bearing block 47b and the force-sharing block 47c respectively. A second telescopic column 47e is fixedly connected to the side of the force-sharing block 47c away from the bearing block 47b. The second telescopic column 47e is fixedly connected to the top of the inner side of the lifting guide rail 47a. A first compression spring 47f is fixedly connected to the inner side of both the first telescopic column 47d and the second telescopic column 47e. A telescopic rod 47g is rotatably connected to the outer side of the force-sharing block 47c. The telescopic rod 47g is rotatably connected to the top of the bearing block 47b. A second compression spring 47h is fixedly connected to the outer side of the telescopic rod 47g.
[0035] In this embodiment: the support box 41 is not directly fixed to the outside of the drive shaft 2, but is instead supported by lifting guide rails 47a on both sides of the tool housing 1. The support box 41 is movably connected to the inside of the lifting guide rail 47a via a bearing block 47b. A force-distributing block 47c is provided at a higher point of the lifting guide rail 47a to decompose vibration forces. When a large vibration impacts the main body of the support box 41, since it is not rigidly fixed, the support box 41 will slide upwards along the lifting guide rail 47a via the bearing block 47b. During this upward sliding, the force-distributing block 47c is simultaneously driven upwards by the first telescopic column 47d. At this time, the force-distributing block 47c is connected to the first telescopic column 47d between the force-distributing block 47c and the bearing block 47b, and the force-distributing block 47c is connected to the inner wall of the lifting guide rail 47a. Both telescopic columns 47e and their internal first compression springs 47f contract and store elastic potential energy. In addition, the non-vertical inclined side of the outer wall of the force component block 47c is rotatably connected to the top of the bearing block 47b with a telescopic rod 47g. A second compression spring 47h is provided at the telescopic point. During the above sliding process, the telescopic rod 47g and its outer second compression spring 47h also contract and store elastic potential energy. In this way, the vertical first telescopic column 47d, the second telescopic column 47e and its inner first compression spring 47f, and the obliquely rotatably connected telescopic rod 47g and its outer second compression spring 47h form a multi-directional buffer structure, which can offset the vibration and impact force generated by the processing of the drive shaft 2 and avoid damage to the support box 41 and its internal structure.
[0036] Specifically, such as Figure 5 As shown, a dust-adhesive sheet 6 is fixedly connected to the bottom of the sealing flip cover 52.
[0037] Specifically, such as Figure 3 As shown, a ceramic sleeve 7 is fixedly connected to the outer side of the ball 46.
[0038] In this embodiment: the dust adsorption sheet 6 can adsorb the dust at the opening of the oil filler port 51, and the ceramic sleeve 7 can optimize the transmission efficiency of the lubricating oil and the contact effect between the ball bearing 46 and the drive shaft 2.
[0039] Working principle: When using a handheld power tool, such as an electric impact drill 3, which consists of a tool housing 1, a drive shaft 2, and an impact drill 3, the drive shaft 2 is an extension of the internal drive structure of the tool housing 1 and is mainly used to drive the impact drill 3 on the outside. A support box 41 for lubrication support is provided on the outside of the drive shaft 2. Multiple sets of oil storage rings 42 are fixedly connected from top to bottom to the inner wall of the support box 41, and a support half-ring 43 is connected to the side of each oil storage ring 42 facing the inside of the support box 41. Oil holes 44 are opened at the positions of the support half-rings 43 and the oil storage rings 42 to facilitate the transfer of lubricating oil from the oil storage rings 42 to the support half-rings 43. In addition, multiple rotating ring frames 45 are distributed in a ring array inside the support half-rings 43. Furthermore, each pair of rotating ring frames 45 has a ball bearing an outer ceramic sleeve 7 rotatably connected to its inner side. Each ball bearing 46 has an oil hole 44 blocked on its side, allowing the side of the ball bearing 46 blocking the oil hole 44 to contact and adhere to the lubricating oil. The other side of the ball bearing 46 contacts the outer wall of the drive shaft 2. Therefore, when the drive shaft 2 rotates, it drives multiple balls bearing 46 inside the support box 41 to rotate on the rotating ring frame 45, switching their contact surfaces with the oil holes 44. When the side originally in contact with the oil flips to contact the outer wall of the drive shaft 2, the lubricating oil is evenly applied to the outer side of the drive shaft 2 through the adhesion of multiple sets of balls bearing 46. This provides timely and automatic lubrication during operation and effectively controls the amount of oil used. During the processing, due to the interaction between the impact drill 3 and the processing... When the main body is in operation, it generates a large interaction force, which will cause a certain degree of vibration. To ensure the stability of the main body support box 41 and the internal lubrication structure, the support box 41 is not directly fixed to the outside of the drive shaft 2. Instead, lifting guide rails 47a for support are provided on both sides of the tool housing 1. The support box 41 is movably connected to the inside of the lifting guide rails 47a through the bearing block 47b. At the higher part of the lifting guide rails 47a, there is also a force-distributing block 47c for decomposing the vibration force. When the vibration impacts the main body of the support box 41, since it is not rigidly connected, it will slide upward along the lifting guide rails 47a through the bearing block 47b. When sliding upward, the force-distributing block 47c will move upward simultaneously through the first telescopic column 47d. When sliding, the first telescopic column 47d between the force component block 47c and the bearing block 47b, and the second telescopic column 47e between the force component block 47c and the inner wall of the lifting guide rail 47a, along with their internal first compression spring 47f, will all contract and generate elastic potential energy. On the non-vertical side of its outer wall, a telescopic rod 47g is obliquely rotatably connected to the top of the bearing block 47b, and a second compression spring 47h is provided at the telescopic point. When this occurs, the telescopic rod 47g and its outer second compression spring 47h also contract and accumulate elastic potential energy. Thus, through the vertical first telescopic column 47d and second telescopic column 47e and their inner first compression spring 47f, and through the obliquely rotatably connected telescopic rod 47g and its outer second compression spring 47h, a multi-directional buffer structure is formed.The vibration and impact force generated during the processing of the drive shaft 2 is offset, avoiding damage to the support box 41 and its internal structure. After the processing is completed, each oil reservoir ring 42 can be individually lubricated through the oil replenishment port 51 using a special narrow-mouth oil replenishment device. To ensure that a large amount of dust and impurities do not accumulate inside the oil replenishment port 51, a sealing flip cover 52 is provided at the top of the oil replenishment port 51. This flip cover is rotatably connected to the top of the oil replenishment port 51 and is engaged with the top of the oil replenishment port 51 by an elastic sealing block 53. In use, rotate the sealing flip cover 52 to insert the narrow opening into the oil replenishment port 51 for oil replenishment, and then directly pull out the oil replenishment device through the oil replenishment port 51. Because the torsion spring 55 at the rotation point of the sealing flip cover 52 tightens and generates elastic potential energy when it is opened previously, it will quickly rotate and close under the elastic potential energy after the device is pulled out, causing the elastic sealing block 53 to be squeezed and locked into the sealing groove 54, thereby reducing the opening time. In summary, this achieves self-lubrication optimization for handheld power tools, and is suitable not only for the impact drill 3 but also for other axis-driven handheld devices.
[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An automatic lubrication structure of a hand-held electric power tool comprising a tool housing (1), characterized by: The bottom of the tool shell (1) is movably connected with a driving shaft (2), the bottom of the driving shaft (2) is movably connected with a percussion drill (3), the outer side of the driving shaft (2) is movably connected with a lubricating mechanism (4), and the outer side of the lubricating mechanism (4) is movably connected with a sealing mechanism (5). The lubricating mechanism (4) comprises a supporting box (41) arranged on the outer side of the driving shaft (2), the inner side of the supporting box (41) is fixedly connected with an oil storage ring (42), the side, away from the supporting box (41), of the oil storage ring (42) is fixedly connected with a supporting half ring (43), the side, corresponding to the oil storage ring (42), of the supporting half ring (43) is provided with an oil hole (44), the inner side of the supporting half ring (43) is fixedly connected with a rotating ring frame (45), the outer side of the rotating ring frame (45) is rotatably connected with a ball (46), the ball (46) is arranged on the inner side of the oil hole (44), the top of the supporting box (41) is movably connected with a buffer assembly (47), and the buffer assembly (47) is movably connected to the outer side of the tool shell (1).
2. The automatic lubricating structure of a hand-held electric power tool according to claim 1, wherein: The sealing mechanism (5) comprises an oil supplementing port (51) fixedly connected to the outer side of the oil storage ring (42), and the oil supplementing port (51) is movably connected to the outer side of the supporting box (41).
3. The automatic lubricating structure of a hand-held electric power tool according to claim 2, wherein: The top of the oil supplementing port (51) is rotatably connected with a sealing flip cover (52), the bottom of the sealing flip cover (52) is fixedly connected with an elastic sealing block (53), the top of the oil supplementing port (51) is provided with a sealing groove (54), and the elastic sealing block (53) is movably connected to the inner side of the sealing groove (54).
4. The automatic lubricating structure of a hand-held electric power tool according to claim 3, wherein: The outer side of the sealing flip cover (52) is fixedly connected with a torsional spring (55), and the torsional spring (55) is fixedly connected to the outer side of the oil supplementing port (51).
5. The automatic lubricating structure of a hand-held electric power tool according to claim 1, wherein: The buffer assembly (47) comprises lifting rails (47a) fixedly connected to the two sides of the tool shell (1), the bottom of the inner side of the lifting rail (47a) is slidably connected with a bearing block (47b), and the bearing block (47b) is fixedly connected to the two sides of the supporting box (41).
6. The automatic lubrication structure of a hand-held electric power tool according to claim 5, wherein: The inner side of the lifting rail (47a) is slidably connected with a force distribution block (47c), the force distribution block (47c) is arranged on the top of the bearing block (47b), the side, corresponding to the bearing block (47b), of the force distribution block (47c) is fixedly connected with a first telescopic column (47d), the side, away from the bearing block (47b), of the force distribution block (47c) is fixedly connected with a second telescopic column (47e), the second telescopic column (47e) is fixedly connected to the top of the inner side of the lifting rail (47a), the inner sides of the first telescopic column (47d) and the second telescopic column (47e) are fixedly connected with first compression springs (47f), the outer side of the force distribution block (47c) is rotatably connected with a telescopic pull rod (47g), the telescopic pull rod (47g) is rotatably connected to the top of the bearing block (47b), and the outer side of the telescopic pull rod (47g) is fixedly connected with a second compression spring (47h).
7. The automatic lubrication structure of a hand-held electric power tool according to claim 4, wherein: The bottom of the sealing flip cover (52) is fixedly connected with a dust sticking piece (6).
8. The automatic lubricating structure of a hand-held electric power tool according to claim 1, wherein: The outer side of the ball (46) is fixedly connected with a ceramic sleeve layer (7).