Swing tool having a working head with a damping structure and application of the working head

Abstract

The utility model discloses a working head with shock attenuation structure, including working head mounting seat, be provided with output shaft on working head mounting seat, and one end of output shaft is provided with the fork, and one end is provided with the function head, be provided with the mounting hole on working head mounting seat, and the intermediate seat is connected with the mounting hole, and the outside of working head mounting seat and intermediate seat is provided with working head shell, and be provided with first elastic part between intermediate seat and working head shell, working head mounting seat, the eccentric transmission shaft is arranged between intermediate seat and working head shell, and the swing bearing of eccentric transmission shaft one end is connected through the fork with one end of output shaft, and the other end of eccentric rotation axis still sets up first coupling, and still be provided with second elastic part between working head shell and first coupling. The utility model has realized the shock attenuation of axis and the shock attenuation of working head and head changer host computer connecting position, can prevent the problem of sticking of connecting position, improves the operation comfort of swing tool.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, specifically a working head with a shock-absorbing structure. Background Technology

[0002] Power tools, such as oscillating power tools. Oscillating power tools generally include a housing, a motor housed within the housing, an output shaft for mounting functional heads, and an eccentric transmission mechanism connecting the motor and the output shaft. This eccentric transmission mechanism converts the rotational motion of the motor shaft into the oscillating motion of the output shaft around its own axis. Thus, by connecting different functional heads, such as straight saw blades, circular saw blades, or triangular grinding discs, to the free end of the output shaft, the oscillating power tool can perform various operations, such as sawing, cutting, grinding, and scraping, to adapt to different work requirements.

[0003] The aforementioned oscillating power tools typically have a functional head mounted on a working head, which is then detachably connected to the corresponding main body housing. Because the functional head of the oscillating tool reciprocates, it generates high-frequency vibration. Since both the working head's outer shell and the main body housing are generally made of plastic, prolonged use can cause adhesion problems at the connection point, affecting work head replacement and disrupting the axial rotational force between the eccentric drive shaft and the motor shaft, thus impacting machining accuracy. Furthermore, the vibration generated by the functional head is directly transmitted to the motor, which in turn acts directly on the main body housing. Since the operator holds the main body housing directly, this can easily cause numbness and reduce operator comfort. Utility Model Content

[0004] The purpose of this invention is to provide a working head with a shock-absorbing structure and a swing tool using the working head, so as to solve the problems existing in the background art.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] A working head with a shock-absorbing structure includes a working head mounting base, an output shaft mounted on the mounting base, a shift fork at one end of the output shaft and a functional head at the other end, a mounting hole on the mounting base, an intermediate seat connected to the mounting hole, a working head housing on the outer side of the working head mounting base and the intermediate seat, and a first elastic element between the intermediate seat and the working head housing, an eccentric drive shaft passing through the working head mounting base, the intermediate seat and the working head housing, a swing bearing at one end of the eccentric drive shaft connected to one end of the output shaft via a shift fork, a first coupling sleeved on the other end of the eccentric drive shaft, a second elastic element between the working head housing and the first coupling, and a first locking structure connected to the head-changing host at the port of the working head housing away from the working head mounting base.

[0007] Preferably, the outer side of the working head mounting base is symmetrically provided with two first limiting mounting grooves, the working head housing includes a first housing and a second housing, and both the first housing and the second housing are provided with second limiting mounting grooves, and a third elastic element is provided between the second limiting mounting groove and the corresponding first limiting mounting groove.

[0008] Preferably, the first and third elastic elements are compression springs, and the second elastic element is a rubber positioning sleeve.

[0009] Preferably, one end of the intermediate seat is inserted into the mounting hole of the working head mounting seat and fixedly connected by screws. The eccentric drive shaft is connected to the shift fork through a swing bearing, connected to the intermediate seat through at least one intermediate seat bearing, and connected to the working head housing through a tail bearing.

[0010] Preferably, the aforementioned working head mounting base is also provided with a quick-release assembly for replacing the functional head.

[0011] A swing tool includes a head-changing main unit and a working head. The head-changing main unit includes a main unit housing with a grip portion formed thereon. A battery pack is disposed at the bottom of the main unit housing. A motor and a control component are disposed inside the main unit housing, and the battery pack, control component, and motor are electrically connected. A switch button for activating the control component is also disposed at the grip portion. The working head housing is connected to the main unit housing, and a first coupling is connected to a second coupling on the motor output shaft.

[0012] Preferably, a connecting portion is formed between the main housing and the gripping portion, the connecting portion is provided with an identification interface, the working head housing is provided with one mounting position or two symmetrical mounting positions connected to the identification interface, the main housing is provided with a connection port, and a second locking structure equipped with the first locking structure is provided at the connection port.

[0013] This utility model has the following beneficial effects: The working head of this utility model has a simple structure. Through the design of the working head shell and the setting of a first elastic element between the working head shell and the intermediate seat, the vibration force generated by the functional head can be axially reduced, absorbed onto the working head shell, and finally transmitted to the head-changing host, which significantly achieves the shock absorption effect and improves the operator's comfort. At the same time, the setting of a second elastic element between the working head shell and the coupling can make the connection between the working head shell and the head-changing host elastic, which can further reduce the vibration force and greatly reduce the problem of adhesion at the connection position. It can also ensure the coaxial rotation of the eccentric drive shaft and the motor output shaft, and improve the machining accuracy of the tool. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the disassembled structure of the working head in this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the working head in this utility model;

[0016] Figure 3 This is a schematic diagram showing the disassembled structure between the head-changing host and the working head of the swing tool in this utility model.

[0017] Figure 4 This is a schematic diagram showing the disassembled structure between the angle grinder working head with two mounting positions and the head changing host in this utility model.

[0018] In the diagram: 1-Working head mounting base; 2-Intermediate seat; 3-First elastic element; 4-Eccentric drive shaft; 5-Output shaft; 6-Shift fork; 7-Functional head; 8-First coupling; 9-Second elastic element; 10-First locking structure; 11-First housing; 12-Second housing; 13-Second limit mounting groove; 14-Third elastic element; 15-Swing bearing; 16-Intermediate seat bearing; 17-Tail bearing; 18-Main unit housing; 19-Grip part; 20-Battery pack; 21-Switch button; 22-Second coupling; 23-Connecting part; 24-Identification interface; 25-Mounting position; 26-Second locking structure; 101-Mounting hole; 102-First limit mounting groove. Detailed Implementation

[0019] 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. Example

[0020] like Figure 1-2As shown, the working head with a shock-absorbing structure includes a working head mounting base 1, an output shaft 5 on the working head mounting base 1, a shift fork 6 at one end of the output shaft 5 and a functional head 7 at the other end, a mounting hole 101 on the working head mounting base 1, an intermediate seat 2 connected to the mounting hole 101, a working head housing on the outer side of the working head mounting base 1 and the intermediate seat 2, and a first elastic element 3 between the intermediate seat 2 and the working head housing, an eccentric drive shaft 4 passing through the working head mounting base 1, the intermediate seat 2 and the working head housing, a swing bearing 15 at one end of the eccentric drive shaft 4 connected to one end of the output shaft 5 via the shift fork 6, a first coupling 8 sleeved on the other end of the eccentric drive shaft 4, a second elastic element 9 between the working head housing and the first coupling 8, and a first locking structure 10 connected to the head-changing host at the port of the working head housing away from the working head mounting base 1.

[0021] The working head of this utility model has a simple structure. Through the design of the working head shell and the setting of a first elastic element 3 between the working head shell and the intermediate seat 2, it is equivalent to setting a coupling shell outside the working head mounting seat 1. This can axially reduce the vibration force generated by the functional head 7, absorb it onto the working head shell, and finally transmit it to the head changing host, which significantly achieves the vibration reduction effect and improves the operator's comfort. At the same time, the setting of a second elastic element 9 between the working head shell and the first coupling 8 can make the connection between the working head shell and the head changing host elastic, which can further reduce the vibration force and greatly reduce the problem of adhesion at the connection position. It can also ensure the coaxial rotation of the eccentric drive shaft 4 and the motor output shaft, improving the machining accuracy of the tool.

[0022] Furthermore, two first limiting mounting grooves 102 are symmetrically arranged on the outer side of the working head mounting base 1. The working head shell includes a first shell 11 and a second shell 12, and both the first shell 11 and the second shell 12 are provided with second limiting mounting grooves 13. A third elastic element 14 is provided between the second limiting mounting groove 13 and the corresponding first limiting mounting groove 102. This design, by symmetrically arranging the third elastic element 14 between the working head mounting base 1 and the two shells, achieves elastic positioning and installation between components, improving the structural stability of the working head. It also provides longitudinal buffering of the vibration force of the working head, achieving a shock absorption effect, thereby improving the overall tool's user comfort and machining accuracy stability.

[0023] Furthermore, the first elastic element 3 and the third elastic element 14 are compression springs, and the second elastic element 9 is a rubber positioning sleeve. This design utilizes readily available materials, facilitates installation, and achieves good shock absorption, thereby reducing the probability of adhesion between the working head and the head-changing main unit, and improving the overall effectiveness of the tool.

[0024] Furthermore, one end of the intermediate seat 2 is inserted into the mounting hole 101 of the working head mounting seat 1 and fixedly connected by screws. The eccentric drive shaft 4 is connected to the shift fork 6 via a swing bearing 15, connected to the intermediate seat 2 via at least one intermediate seat bearing 16, and connected to the working head housing via a tail bearing 17. This design makes the working head's connection structure more compact and stable, with better vibration damping, thereby improving the tool's operational stability. Two intermediate seat bearings 16 can be designed to enhance the overall reliability of the product.

[0025] Furthermore, the working head mounting base 1 is also equipped with a quick-release assembly for replacing the functional head 7. The above design facilitates the flexible replacement of the functional head 7. As for the specific components included in the quick-release assembly, conventional structures in existing designs can be used, such as a combination of components like a push switch, a flexible connector, and a positioning mounting component. By operating the push switch (which can be located on the working head housing), the corresponding components are activated, enabling quick installation and removal of the functional head 7. Further details will not be elaborated here.

[0026] like Figure 3-4 As shown, a swing tool includes a head-changing main unit and a working head. The head-changing main unit includes a main unit housing 18, on which a gripping part 19 is formed. A battery pack 20 is provided at the bottom of the main unit housing 18. A motor and a control component are provided inside the main unit housing 18, and the battery pack 20, the control component, and the motor are electrically connected. A switch button 21 for activating the control component is also provided at the gripping part 19. The working head housing is connected to the main unit housing 18, and a first coupling 8 is connected to a second coupling 22 on the motor output shaft. A connecting part 23 is formed between the main unit housing 18 and the gripping part 19. An identification interface 24 is provided on the connecting part 23. The working head housing is provided with one mounting position 25 or two symmetrical mounting positions 25 connected to the identification interface 24. A connection port is provided on the main unit housing 18, and a second locking structure 26 fitted with a first locking structure 10 is provided at the connection port.

[0027] The aforementioned swing tool has a simple structure. The head-changing host can be a conventional swing tool structure found in existing designs. A detachable connection between the working head and the head-changing assembly is achieved through the second locking structure 26 of the first locking structure 10. The locking structure can be a slot-type insertion or a spring-loaded pressing connection, as is common in existing technologies. The working head shell can be directly connected to the head-changing host, or it can be connected via a design identification interface 24 and mounting positions 25. The mounting positions 25 can be flexibly designed as one or two, enabling multi-head operation of the head-changing host, providing convenient operation and strong practical flexibility. Furthermore, the symmetrical design of two mounting positions 25 allows for two-way installation of the head, enabling the operator to flexibly grasp the tool with either their left or right hand, improving the tool's usability. Figure 4As shown, the specific connection structure and working principle between the mounting position 25 and the identification interface 24 can be found in the disclosure of a replaceable head power tool with a safety mechanism in publication number CN215201851U, and will not be repeated here.

[0028] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A working head with a shock-absorbing structure, comprising a working head mounting base, wherein an output shaft is disposed on the working head mounting base, and one end of the output shaft is provided with a shift fork, and the other end is provided with a functional head; the working head mounting base is provided with a mounting hole, and an intermediate seat is connected to the mounting hole, characterized in that: A working head housing is provided on the outer side of the working head mounting base and the intermediate base, and a first elastic element is provided between the intermediate base and the working head housing. An eccentric drive shaft is passed through the working head mounting base, the intermediate base and the working head housing. The swing bearing at one end of the eccentric drive shaft is connected to one end of the output shaft through a shift fork. A first coupling is also sleeved on the other end of the eccentric drive shaft. A second elastic element is also provided between the working head housing and the first coupling. A first locking structure connected to the head changing host is provided at the port of the working head housing away from the working head mounting base.

2. The working head with a shock-absorbing structure according to claim 1, characterized in that: The outer side of the working head mounting base is symmetrically provided with two first limiting mounting grooves. The working head housing includes a first housing and a second housing, and both the first housing and the second housing are provided with second limiting mounting grooves. A third elastic element is provided between the second limiting mounting groove and the corresponding first limiting mounting groove.

3. The working head with a shock-absorbing structure according to claim 2, characterized in that: The first and third elastic elements are compression springs, and the second elastic element is a rubber positioning sleeve.

4. The working head with a shock-absorbing structure according to claim 1, characterized in that: One end of the intermediate seat is inserted into the mounting hole of the working head mounting seat and fixedly connected by screws. The eccentric drive shaft is connected to the shift fork through a swing bearing, connected to the intermediate seat through at least one intermediate seat bearing, and connected to the working head housing through a tail bearing.

5. The working head with a shock-absorbing structure according to claim 1, characterized in that: The working head mounting base is also equipped with a quick-release assembly for replacing the functional head.

6. A swinging tool, characterized in that: The device includes a head-changing main unit and a working head as described in any one of claims 1 to 5. The head-changing main unit includes a main unit housing with a gripping portion formed thereon. A battery pack is disposed at the bottom of the main unit housing. A motor and a control component are disposed inside the main unit housing, and the battery pack, the control component, and the motor are electrically connected. A switch button for starting the control component is also disposed at the gripping portion. The working head housing is connected to the main unit housing, and a first coupling is connected to a second coupling on the motor output shaft.

7. The oscillating tool according to claim 6, characterized in that: A connecting part is formed between the main housing and the gripping part. An identification interface is provided on the connecting part. The working head housing is provided with one mounting position or two symmetrical mounting positions connected to the identification interface. The main housing is provided with a connection port, and a second locking structure equipped with a first locking structure is provided at the connection port.

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