CN110465911B

CN110465911B - Power-off switching type hammer drill tool

Info

Publication number: CN110465911B
Application number: CN201910903404.4A
Authority: CN
Inventors: 吴世清; 张丕泉
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2024-06-11
Anticipated expiration: 2039-09-24
Also published as: CN110465911A

Abstract

The utility model provides a switching-over formula hammer drill instrument cuts off power supply, includes the shell, with shell complex drilling subassembly and hammering subassembly, shift unit, driving motor, stop the subassembly, drilling subassembly and hammering subassembly pass through a drive mechanism and drive motor cooperation transmission, drive mechanism includes driving medium, nested gear train, drilling driven gear, hammering driven gear, and nested gear train one end is connected cooperation transmission with driving motor, and the other end is stirred through the cooperation with the driving medium driven gear driven by shift unit and is realized with drilling driven gear and hammering driven gear's meshing transmission, stop the subassembly including fixed stay contact switch that locates in the knob body, through electric wire and stay contact switch and the controller of driving motor intercommunication, access stay contact switch circuit and locate the contact piece in the switching button. The design has the advantages of easy gear shifting, low equipment wear rate and safe use.

Description

Power-off switching type hammer drill tool

Technical Field

The invention relates to the field of hammer drilling tools, in particular to a power-off switching type hammer drilling tool.

Background

With the continuous development of electromechanical devices, electric tools such as electric drills are increasingly used in civil construction work due to their extremely high working efficiency and flexible use of the working characteristics. In order to punch holes on the surface of concrete or building materials with higher strength and harder texture, a shiftable electric hammer or electric drill is adopted to work at present, and the shiftable punching tool is generally electrified to switch when switching among various gears, so that even if a clutch and a gear still operate in the switching process, particularly the gear and the gear which operate at high speed in the switching process of shifting, the phenomenon of abrasion and damage after the collision of meshing teeth and meshing teeth is serious, the normal operation of the whole equipment is influenced, on the other hand, because a plurality of parts such as the rotation and mutual collision between the clutch and the gear in the switching process, the shifting assembly is difficult to shift and has serious shift blocking feeling, is difficult to operate, moreover, the possibility of accidents is high in the operation process of the drilling equipment in the switching process, and the danger coefficient is high.

Disclosure of Invention

The invention aims to provide a power-off switching type hammer drill tool which is easy to shift gears, low in equipment wear rate and safe to use.

In order to solve the technical problems, the invention adopts the following technical scheme: the power-off switching type hammer drill comprises a shell, a drilling assembly, a hammering assembly, a driving motor, a controller, a transmission mechanism and a gear shifting assembly, wherein the drilling assembly and the hammering assembly are matched with the shell, the controller is used for controlling the driving motor, the transmission mechanism is arranged on the shell, the gear shifting assembly comprises a gear shifting base which is rotatable relative to the shell, a hollow gear shifting knob which is fixedly connected to the gear shifting base, the gear shifting base is rotated by operating the hollow gear shifting knob, the gear shifting base is used for realizing the gear shifting of the transmission mechanism through the transmission of a transmission piece, the gear shifting assembly is provided with a parking assembly and a gear locking device, the parking assembly comprises a switching button which is arranged on the gear shifting assembly and can elastically act, a parking contact switch which is fixedly arranged in the gear shifting assembly and is connected with the controller for communication, a contact piece which is arranged in the gear shifting assembly and is pushed to move by the switching button, the parking contact switch is a normally open contact switch, the contact sheet moves to touch the parking contact switch under the pushing of the switching key, the parking contact switch is triggered to be closed, the controller controls the power off, the driving motor temporarily parks, the contact sheet is separated from the parking contact switch when the switching key elastically resets, the parking contact switch is opened and restored to the state to be triggered, the controller controls the power supply, the driving motor continues to normally work, the gear locking device is used for locking gear shifting, the gear locking device comprises a locking hook fixedly connected on the switching key and matched with the shell, a limiting chute arranged on the gear shifting base, a connecting sliding sheet connected between the locking hook and the switching key and capable of sliding along the limiting chute, a matching opening is arranged above the hollow gear shifting knob, the switching key cover is arranged above the hollow gear shifting knob and matched with the matching opening, a cavity is formed between the hollow gear shifting knob and the switching key, the parking contact switch is located in the cavity, the switching key is installed on the gear shifting assembly through a plurality of pairs of elastic pieces distributed on two sides of the parking contact switch and capable of elastically acting, one end of each elastic piece is fixedly connected in the gear shifting knob, the other end of each elastic piece is fixedly connected in the switching key, when external force presses the switching key, the gear locking device is driven to slide in the limiting sliding groove, the lock hook and the shell are tripped, the gear shifting assembly is unlocked, when the switching key is elastically reset, the gear locking device connected to the switching key slides outwards along the limiting sliding groove, the lock hook is buckled with the shell, and the gear shifting base of the gear shifting assembly is locked.

Further, drilling subassembly and hammering subassembly pass through drive mechanism and driving motor cooperation transmission, drive mechanism includes nested gear train, drilling driven gear, hammering driven gear, the cooperation transmission is connected with driving motor to nested gear train one end, and the other end stirs realization and drilling driven gear and hammering driven gear's meshing transmission through the cooperation with the driving medium, drilling driven gear, hammering driven gear mutually independent set up at nested gear train side and be connected the cooperation with drilling subassembly, hammering subassembly respectively.

Further, nested gear train includes one end and the outer and by the driving piece drive of the outer and gliding overcoat gear about the column shaft of column main gear of driving motor cooperation driven column main gear, shift assembly stirs the overcoat gear and downslide to column main gear hypomere and with drilling driven gear independent meshing position through the driving piece, realize drilling assembly's drive and then begin drilling work, shift assembly stirs the overcoat gear and upslide to column main gear upper segment and with hammering driven gear independent meshing position through the driving piece, realize hammering assembly's drive and then begin hammering work, shift assembly stirs the overcoat gear through the driving piece and move to column main gear middle section, and overcoat gear and drilling driven gear, hammering driven gear are meshing relation, realize drilling assembly and hammering assembly's drive and then begin drilling and hammering work.

The beneficial effects of the invention are as follows: according to the invention, the parking contact switch arranged on the gear shifting assembly is matched with the controller to control the parking and normal operation of the driving motor, so that the gear shifting is carried out in a state that the driving motor is completely powered off after the parking, and the controller is used for controlling the current to supply the driving motor to carry out normal operation after the gear shifting is completed.

Drawings

Fig. 1 is a schematic view of the overall structure of a power-off switching hammer drill tool.

Fig. 2 is a schematic view of the fig. 1 construction with portions removed.

FIG. 3 is a schematic illustration of a shift knob partially disassembled.

Fig. 4 is a schematic diagram of an internal structure of the switching key.

Fig. 5 is a schematic view of the transmission mechanism of fig. 1 with portions removed.

The names of the components indicated by the numbers in the drawings are as follows: 1. a transmission mechanism; 1.1, nested gear sets; 1.11, a column type main gear; 1.12, a gear is sleeved outside; 1.3, a driven gear for drilling; 1.4, hammering the driven gear; 3. a drilling assembly; 4. a hammering assembly; 5. a shift assembly; 5.1, a gear shifting base; 5.11, limiting sliding grooves; 5.12, latch hook; 5.13, connecting sliding sheets; 5.2, a gear shift knob; 5.22, switching keys; 5.23, an elastic member; 6. a driving motor; 7. a parking component; 7.1, a parking contact switch; 7.2, a controller; and 7.3, a contact.

Detailed Description

The innovative features and functions are described in the present application in order to provide a better understanding of the invention.

As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the technical scheme of the power-off switching type hammer drill tool of the invention comprises a shell, a drilling assembly 3 matched with the shell, a hammering assembly 4, a driving motor 6, a controller 7.2 for controlling the driving motor 6, a transmission mechanism 1 and a gear shifting assembly 5 arranged on the shell, wherein the gear shifting assembly 5 comprises a gear shifting base 5.1 which is rotatable relative to the shell, a hollow gear shifting knob 5.2 fixedly connected on the gear shifting base 5.1, the gear shifting base 5.1 is rotated by operating the hollow gear shifting knob 5.2, the gear shifting base 5.1 realizes the gear shifting of the transmission mechanism 1 through the transmission part transmission, the gear shifting assembly 5 is provided with a parking assembly 7 and a gear locking device, the parking assembly 7 comprises a selector button 5.22 which can elastically act and is arranged on the gear shifting assembly 5, a parking contact switch 7.1 fixedly arranged in the gear shifting assembly 5 and communicated with the controller 7.2, a contact 7.3 arranged in the gear shifting assembly 5 and pushed by the selector button 5.22, the motor 7.1 is rotated by operating the hollow gear shifting knob 5.2, the gear shifting base 5.1 is triggered by the motor, the contact 7.1 is triggered by the selector button 7.1, the contact 7.1 is opened when the selector button 7.1 is closed, the selector button 7.1 is opened, the contact 7.1 is controlled to be normally, the selector button 7 is opened, the contact 7.1 is opened, the contact 7 is opened, and the contact 7 is opened by the selector switch is controlled by the selector switch is normally, and the selector switch 1 is opened, and the contact 7.1 is opened, and the contact device is opened by the selector switch 2 The sliding sheet 5.13 is connected between the lock hook 5.12 and the switching key 5.22 and can slide along the limiting sliding groove 5.11, when external force presses the switching key 5.22, the gear locking device is driven to slide along the limiting sliding groove 5.11, the lock hook 5.12 and the shell are tripped, the gear shifting assembly 5 is unlocked, when the switching key 5.22 is elastically reset, the gear locking device connected to the switching key 5.22 slides outwards along the limiting sliding groove 5.11, the lock hook 5.12 is buckled with the shell, and the gear shifting base 5.1 of the gear shifting assembly 5 is locked.

In one embodiment of the present invention, in order to further reduce the volume of the hammer drilling tool, a nested design is further performed on the hammering assembly 4 and the drilling assembly 3, that is, the hammering assembly 4 is nested in the drilling assembly 3, the design minimizes the space inside the housing occupied by the hammering assembly 4 and the drilling assembly 3, fully utilizes the space inside the housing, improves the space utilization rate, reduces the overall volume of the hammer drilling tool, makes the hammer drilling tool more portable, and is more convenient and handy to use.

In a preferred embodiment of the present invention, a mating opening is formed above the hollow shift knob 5.2, the switch button 5.22 is covered above the hollow shift knob 5.2 and mates with the mating opening, a cavity is formed between the hollow shift knob 5.2 and the switch button 5.22, the parking contact switch 7.1 is located in the cavity, the switch button 5.22 is installed on the shift assembly 5 through a plurality of pairs of elastic members 5.23 distributed on both sides of the parking contact switch 7.1 and capable of elastically moving, one end of the elastic member 5.23 is fixedly connected in the shift knob 5.2, the other end is fixedly connected in the switch button 5.22, the above design fully utilizes redundant space in the shift knob 5.2, and sets the components such as the parking contact switch 7.1 and the elastic member 5.23 in the hollow shift knob 5.2, simplifies the structure of the shift assembly 5 and the parking assembly 7, occupies smaller space to complete the installation of the shift assembly 5 and the parking assembly 7, simplifies the structure of the hammer drill, and is convenient to use.

In a preferred embodiment of the present invention, in order to make the matched transmission of the nested gear set 1.1 with the hammering assembly 4 and the drilling assembly 3 more stable, the structure of the transmission mechanism 1 is more compact, small and light, and the use of a large number of auxiliary assembly components is reduced, the drilling assembly 3 and the hammering assembly 4 are matched with the driving motor 6 to transmit through the transmission mechanism 1, the transmission mechanism 1 comprises the nested gear set 1.1, a drilling driven gear 1.3 and a hammering driven gear 1.4, one end of the nested gear set 1.1 is connected with the driving motor 6 to transmit in a matched manner, the other end of the nested gear set realizes the meshed transmission with the drilling driven gear 1.3 and the hammering driven gear 1.4 through the matched stirring with the transmission member, the drilling driven gear 1.3 and the hammering driven gear 1.4 are independently arranged beside the nested gear set 1.1 and are respectively connected with the drilling assembly 3 and the hammering assembly 4, the nested gear set 1.1 comprises a post-type main gear 1.11, nested outside the post-type main gear 1.11 and driven by the transmission member to drive the upper and lower sleeve gear 1.12, the driven gear 1.1.4 is meshed with the driving assembly 1.1.4 through the driving member to the driving member 1.3 and the driving member 1.4, the driving member is meshed with the driving member 1.1.4 to the driven member 1.1 and the driven member 1.4 is meshed with the driving member 1.1, the drilling assembly 3 and the hammering assembly 4 are driven to start drilling and hammering.

In the practical application process, the elastic piece 5.23 can also adopt a compression spring, the design also further reduces the cost of the elastic piece 5.23 and the weight of the gear shifting assembly 5, the application of the elastic piece 5.23 with large weight is avoided, and because the application of the elastic piece 5.23 and the elastic piece are provided with the characteristic of elasticity, the elastic piece 5.23 is easy to skew and loose under long-time working, so that the problem that rebound and pressing cannot be normally carried out is solved, and a positioning cavity for installing and accommodating the elastic piece 5.23 can be correspondingly arranged in the gear shifting knob 5.2 and the switching key 5.22, so that the elastic piece 5.23 can be stably installed and matched in the positioning cavity.

The design is switched and is shifted easily and conveniently, common blocking sense in the switching process in the prior art is reduced, the integral transmission is simple, necessary matched parts are fewer, the assembly is simple, the weight of the integral hammer drilling tool is light and the production cost is lower after the assembled parts are greatly reduced, on the other hand, the matched transmission of the outer sleeve gear, the drilling driven gear and the hammering driven gear is realized through the up-and-down sliding of the outer sleeve gear on the column main gear, the vibration of the driving motor is smaller compared with that of most of the existing punching equipment, the vibration noise of the integral hammer drilling tool is also greatly reduced, the switching operation is convenient, and the operability is stronger.

In the invention, because the space in the shell is limited, and the space in the shell is fully utilized, the controller 7.2 can be arranged at the inner bottom of the hand-held part of the shell in practical application, the redundant space in the shell is fully utilized, the weight of the whole shell is relatively balanced, and the problem of head weight and foot weight is avoided. At present, the controller 7.2 in practical application can adopt more components such as a magnetic latching relay with the model of RRT-5C, and of course, other components capable of controlling the current switching-on and switching-off of the circuit can also be adopted for circuit control.

Although the present invention has been described with reference to the above embodiments, it should be understood that the invention is not limited thereto, but may be modified and altered somewhat by those skilled in the art without departing from the spirit and scope of the present invention, and the scope of the invention is therefore to be limited only by the scope of the appended claims.

Claims

1. A power-off switching type hammer drill tool, which is characterized in that: comprises a shell, a drilling assembly (3) and a hammering assembly (4) which are matched with the shell, a driving motor (6), a controller (7.2) for controlling the driving motor (6), a transmission mechanism (1) and a gear shifting assembly (5) arranged on the shell, wherein the gear shifting assembly (5) comprises a gear shifting base (5.1) which can rotate relative to the shell, a hollow gear shifting knob (5.2) fixedly connected to the gear shifting base (5.1), the gear shifting base (5.1) is rotated by operating the hollow gear shifting knob (5.2), the gear shifting base (5.1) realizes the gear shifting of the transmission mechanism (1) through the transmission of a transmission piece, the gear shifting assembly (5) is provided with a parking assembly (7) and a gear locking device, the parking assembly (7) comprises a switching key (5.22) which is arranged on the gear shifting assembly (5) and can elastically act, a parking contact switch (7.1) which is fixedly arranged in the gear shifting assembly (5) and is communicated with the controller (7.2), a contact piece (7.3) which is arranged in the gear shifting assembly (5) and is pushed to move by the switching key (5.22), the parking contact switch (7.1) is a normally open contact switch, the contact piece (7.3) is pushed by the switching key (5.22) to move to touch the parking contact switch (7.1), the parking contact switch (7.1) is triggered to be closed, the controller (7.2) controls power off, the driving motor (6) temporarily parks, the contact piece (7.3) is separated from the parking contact switch (7.1) when the switching key (5.22) elastically resets, the parking contact switch (7.1) is opened and returns to a to-be-triggered state, the controller (7.2) controls power supply, the driving motor (6) continues to normally work, the gear locking device is used for locking gear shifting, the gear locking device comprises a lock hook (5.12) fixedly connected on the switching key (5.22) and matched with a shell and lockable, a limit chute (5.11) arranged on a gear shifting base (5.1), A connecting sliding sheet (5.13) which is connected between the lock hook (5.12) and the switching key (5.22) and can slide along the limit sliding groove (5.11), a matching opening is arranged above the hollow gear shifting knob (5.2), the switching key (5.22) is covered above the hollow gear shifting knob (5.2) and matched with the matching opening, a cavity is formed between the hollow gear shifting knob (5.2) and the switching key (5.22), the parking contact switch (7.1) is positioned in the cavity, the switching key (5.22) is arranged on the gear shifting assembly (5) in a mode that a plurality of pairs of elastic pieces (5.23) distributed on two sides of the parking contact switch (7.1) can elastically move, one end of the elastic piece (5.23) is fixedly connected in the gear shifting knob (5.2), the other end of the elastic piece is fixedly connected in the switching key (5.22), when external force presses the switching key (5.22), the gear locking device is driven to slide along the limiting sliding groove (5.11), the lock hook (5.12) is tripped with the shell, the gear shifting assembly (5) is unlocked, when the switching key (5.22) is elastically reset, the gear locking device connected to the switching key (5.22) slides outwards along the limiting sliding groove (5.11), the lock hook (5.12) is buckled with the shell, and the gear shifting base (5.1) of the gear shifting assembly (5) is locked.

2. A power-off switching hammer drill tool according to claim 1, wherein: drilling subassembly (3) and hammering subassembly (4) pass through drive mechanism (1) and driving motor (6) cooperation transmission, drive mechanism (1) are including nested gear train (1.1), drilling driven gear (1.3), hammering driven gear (1.4), the cooperation transmission is connected with driving motor (6) to nested gear train (1.1) one end, and the other end is stirred through the cooperation with the driving medium and is realized with the meshing transmission of drilling driven gear (1.3) and hammering driven gear (1.4), drilling driven gear (1.3), hammering driven gear (1.4) mutually independent set up at nested gear train (1.1) side and be connected the cooperation with drilling subassembly (3), hammering subassembly (4) respectively.

3. A power-off switching hammer drill tool according to claim 2, wherein: the nested gear set (1.1) comprises a column type main gear (1.11) with one end being matched with a driving motor (6) for transmission, and a sleeve gear (1.12) which is nested outside the column type main gear (1.11) and driven by a transmission piece to slide up and down along a column shaft, wherein the gear shifting assembly (5) drives the sleeve gear (1.12) to slide down to the lower section of the column type main gear (1.11) and to be in independent meshing position with a driven drilling gear (1.3) through the transmission piece, so that the drilling assembly (3) is driven to start drilling, the gear shifting assembly (5) drives the sleeve gear (1.12) to slide up to the upper section of the column type main gear (1.11) through the transmission piece and to be in independent meshing position with the driven hammering gear (1.4), the driving of the hammering assembly (4) is realized, hammering operation is started, the gear shifting assembly (5) drives the sleeve gear (1.12) to move to the middle section of the column type main gear (1.11) through the transmission piece, and the hammering assembly (1.12) and the driven drilling driven gear (1.3) are in meshing relation with the driven drilling driven gear (1.4).