Energy-saving efficient linear motion tool

Abstract

The utility model discloses an energy-saving efficient linear motion tool which comprises a machine shell and a linear motor, and the linear motor transmits power to an output assembly. The output assembly comprises an output support and an output acting piece. An energy storage mechanism, a locking and releasing mechanism and a locking and releasing triggering mechanism are arranged in the machine shell; the lock-release triggering mechanism triggers the lock-release mechanism to release the output assembly to do work, and the lock-release mechanism and the lock-release triggering mechanism are automatically reset; during forward acting, the linear motor drives the output assembly to move, and the spring force of the energy storage mechanism is superposed with the motor driving force; and during return stroke, the linear motor drives the energy storage mechanism to store energy, and the locking and releasing mechanism is locked at the limiting position for energy locking. The utility model has the beneficial effects that the energy storage mechanism is used for storing energy, and the energy is superposed with the positive force of the linear motor, so that the positive acting force and the acting speed are improved, the acting time is shortened, and the acting efficiency and the acting frequency are improved; output force and energy supply of forward acting of the linear motor are reduced, and the size and cost of the linear motor are indirectly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric tools, and in particular relates to an energy-saving and high-efficiency linear motion tool. Background Art

[0002] Linear motion tools can be used in the hardware and electrical industry, specifically in various reciprocating linear motion tools such as electric nail guns, rivet guns, glue guns, electric picks, and electric hammers.

[0003] Most of the electric nail guns currently used on the market use structures such as those disclosed in patent CN117733793A "Nail energy storage assembly, nail energy storage control mechanism and nail gun" and patent CN220428256U "A high-strength lithium-ion nail gun with a composite energy storage structure", using a rotating motor as a driving source, converting the rotary motion of the rotating motor into linear motion through a power conversion mechanism, and relying on a spring to reset. During use, it was found that the rotating motor increases the torque by a large transmission ratio to store energy, and releases the stored energy to work when the energy storage reaches the limit. The single work time is too long, resulting in low work efficiency. In the prior art, there is a mechanism that uses an electromagnet to cooperate with a spring to perform unidirectional work and energy storage, but the power of unidirectional work is lost. Therefore, the applicant proposed a method of using a linear power machine (linear motor) to drive the output in patent CN11327606A "An electric nail gun and its accessories".

[0004] However, in all current technologies, the resetting action of the output component is completed by a resetting spring and a linear motor (including a rotary motor or electromagnetic force or electromagnet or linear motor), and its efficiency and stability are low. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems existing in the prior art and to provide an energy-saving and efficient linear motion tool.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] An energy-saving and efficient linear motion tool comprises a casing, in which a linear motor and an output assembly receiving power from the linear motor are arranged, wherein the output assembly comprises an output bracket and an output working member fixed to each other; an energy storage mechanism, a lock-release mechanism and a lock-release trigger mechanism are also arranged in the casing; the lock-release trigger mechanism triggers the lock-release mechanism to release the output assembly; the output assembly has two states: forward working state and return state; when the output assembly is in the forward working state, the linear motor drives the output assembly to move in the output direction, and the spring force of the energy storage mechanism is superimposed on the driving force of the linear motor to enhance the forward working state of the output working member; when the output assembly is in the return state, the linear motor drives the output assembly to reset, and the energy storage mechanism stores energy, and the lock-release mechanism can be locked with the output assembly in the second extreme position to lock energy.

[0008] Preferably, an inner bracket is also provided in the casing; the energy storage mechanism includes a lower energy storage spring and an upper energy storage spring; the first end of the lower energy storage spring is connected to the two sides of the output bracket, and the second end is connected to the inner bracket; the first end of the upper energy storage spring abuts against the top end of the output bracket, and the second end abuts against the inner bracket; while the linear reciprocating motion of the linear motor drives the output bracket to reciprocate along the setting direction of the output working member, the lower energy storage spring and the upper energy storage spring are staggered and extended to store energy, and can generate spring forces in the same direction for superposition.

[0009] Preferably, a spring placement groove for placing the upper energy storage spring is formed at the top of the output bracket; and connecting blocks for hanging the ends of the lower energy storage spring are arranged on both sides of the output bracket.

[0010] Preferably, a guide member is provided inside the housing or the inner bracket, and the guide member is parallel to the output working member; and the linear motor drives the output bracket to move axially along the guide member.

[0011] Preferably, the lock-release trigger mechanism includes a contact switch arranged in the handle portion of the housing and a trigger movable relative to the contact switch; the trigger moves relative to the handle portion and abuts against or moves away from the contact switch to trigger the start and stop of the linear motor and simultaneously trigger the lock-release mechanism to operate.

[0012] Preferably, a groove for placing a reset spring is formed on the inner surface of the trigger; a trigger block protruding from its outer surface is formed on the side wall of the trigger close to the output bracket; the movement of the trigger block in the triggered state is used to drive the rotating part pivotally connected to the housing or the inner bracket to rotate.

[0013] Preferably, the rotating part is provided with an elastic pawl mechanism, which includes a pawl body, a fixed block and an upper spring; the pawl body corresponds to the trigger block; when the trigger block is in the trigger state, it drives the rotating part to rotate to the tilted limit position by pushing the pawl body, and compresses the upper spring until the pawl body is separated from the trigger block, and drives the lock release mechanism to release. Again preferably, the elastic pawl mechanism has an automatic reset function.

[0014] Preferably, the lock release mechanism includes a moving part movably arranged in the housing or the inner bracket and a blocking part fixed on the output bracket; when the lock release mechanism is locked, the moving part abuts against the blocking part and restricts the output bracket from moving in the axial positive direction; the moving part is separated from the blocking part so that the moving part withdraws from the moving path of the output bracket, so that the output assembly enters the positive working state. Again preferably, the moving part has an automatic reset function under the action of elastic force.

[0015] Preferably, the rotating part is arranged to abut against the lock-release mechanism, and the rotating part applies a force to the moving part through a trigger transmission member; the distal end of the rotating part abuts against the trigger transmission member; the trigger transmission member is in an inverted U shape, and a wedge-shaped surface is formed at its open end to cooperate with the top end of the moving part; the main body of the moving part abuts against the blocking part.

[0016] The advantages of the technical solution of the utility model are mainly reflected in:

[0017] The spring force of the energy storage mechanism is superimposed on the positive force of the linear motor, which increases the positive working force and working speed, shortens the working time, and improves the working efficiency and frequency. At the same time, the return energy storage function of the linear motor reduces the energy supply for the positive working of the linear motor, which can reduce the output force of the linear motor by 15%-50%, and indirectly reduce the corresponding volume and cost.

[0018] When working in the forward direction, the upper energy storage spring and the lower energy storage spring simultaneously apply thrust and pull to the output bracket. The two forces disperse the force position and magnitude on the casing or the inner bracket, so that there is almost no inertial force to interfere with the vibration of the whole machine during energy storage. The worker feels better during use and is not prone to fatigue.

[0019] The output bracket can be triggered to move in the casing only after the lock-release trigger mechanism is unlocked and the linear motor is started, which effectively prevents the linear motion tool from being started due to accidental touch, thereby improving the safety of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 : A first direction cross-sectional view of a preferred embodiment of the utility model in a return state;

[0021] Figure 2:The preferred embodiment of the utility model Figure 1 A magnified view of part A;

[0022] Figure 3 : A second directional cross-sectional view of the return state of the preferred embodiment of the utility model;

[0023] Figure 4 : A cross-sectional view in the first direction of the preferred embodiment of the utility model in the forward working state;

[0024] Figure 5 :The preferred embodiment of the utility model Figure 4 A magnified view of part B;

[0025] Figure 6 : A cross-sectional view in the second direction of the preferred embodiment of the utility model in the forward working state;

[0026] Figure 7 : A cross-sectional view of the return state of the second embodiment of the utility model;

[0027] Figure 8 :The second embodiment of the utility model Figure 7 Enlarged view of part C;

[0028] Fig. 9 : A cross-sectional view of the second embodiment of the utility model in a forward working state;

[0029] Fig.10 :The second embodiment of the utility model Fig. 9 Enlarged view of part D. DETAILED DESCRIPTION

[0030] The purpose, advantages and features of the present invention will be illustrated and explained through the non-limiting description of the following preferred embodiments. These embodiments are only typical examples of the application of the technical solution of the present invention, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection claimed by the present invention.

[0031] The utility model discloses an energy-saving and efficient linear motion tool, such as Figures 1 to 10 As shown, taking an electric nail gun as an example, it includes a housing 1, in which a linear motor 2 and an output component 4 receiving power from the linear motor 2 are arranged. An inner bracket 11 is also arranged in the housing 1; and the output component 4 is arranged in the inner bracket 11. In other schemes where the inner bracket 11 is not arranged, the output component 4 and the energy storage mechanism 5 can also be directly arranged in the housing 1. Compared with this design method, the arrangement of the inner bracket 11 in the utility model will make the structure and assembly of the whole machine simpler. At the same time, the inner bracket 11 can be a whole or a general term for multiple parts.

[0032] Further, such as Figure 1 , Figure 4 , Figure 7 and Fig. 9 As shown, the output assembly 4 includes an output bracket 40 and an output working member 41 fixed to each other. Figure 1 , Figure 3 and Figure 4 Figure 6 As shown, a guide member 53 is provided inside the housing 1 or the inner bracket 11, and the guide member 53 is parallel to the output working member 41; the linear motor 2 drives the output bracket 40 to move axially along the guide member 53. The guide member can be a guide rail, a guide column, or other components with a guiding function disclosed in the prior art. In the present utility model, in order to ensure the stability of the movement of the output bracket 40, two guide members 53 are preferably provided, and the two guide members 53 are located on both sides of the output working member 41.

[0033] like Figure 1 , Figure 4 , Figure 7 and Fig. 9 As shown, a transmission connection assembly 3 is provided between the linear motor 2 and the output bracket 40, and its two ends are connected to the linear motor 2 and the output bracket 40 respectively. Specifically, in the preferred embodiment, the transmission connection assembly 3 includes a transmission rod 31 and a balance rod 32. Among them, waist-shaped holes 310 are formed at both ends of the transmission rod 31, and the balance rod 32 is pivotally arranged on the connecting head of the power output end of the linear motor 2 and the output bracket 40. Further, the pivot point of the balance rod 32 is symmetrically arranged on both sides of the linear motor 2 with the pivot point of the transmission rod 31, that is, the balance rod 32 is pivotally connected to the power output end of the linear motor 2, and the force on both sides of the linear motor 2 is balanced by the balance rod 32, so that the whole machine works more stably. Of course, in addition to the transmission structure that changes the motion direction or force transmission direction / magnitude disclosed in the preferred embodiment, the transmission connection assembly 3 can also be a traditional fixed connection structure for transmitting a fixed force.

[0034] An energy storage mechanism 5 is also provided in the housing 1. Figure 3 and Figure 6As shown, in this preferred embodiment, the energy storage mechanism 5 includes a lower energy storage spring 51 and an upper energy storage spring 52. The lower energy storage spring 51 and the upper energy storage spring 52 can exist together and store energy in the energy storage mechanism 5, or they can exist separately and store energy. Among them, the first end of the lower energy storage spring 51 is connected to both sides of the output bracket 40, and the second end is connected to the inner bracket 11; the first end of the upper energy storage spring 52 is abutted against the top of the output bracket 40, and the second end is abutted against the inner bracket 11. While the linear reciprocating motion of the linear motor 2 drives the output bracket 40 to reciprocate along the setting direction of the output working member 41, the lower energy storage spring 51 and the upper energy storage spring 52 are staggered and stretched to store energy, and can generate the same direction spring force for superposition. Through the superposition of the spring force of the energy storage mechanism 5 and the positive force of the linear motor 2, the positive working force and working speed are improved, the working time is shortened, and the working efficiency and frequency are improved. At the same time, the return energy storage function of the linear motor 2 reduces the energy required for the linear motor to do work in the forward direction, which can reduce the output force of the linear motor by 15%-50%, and indirectly reduce the volume and cost of the corresponding linear motor.

[0035] Similarly, experienced technicians will be able to selectively use the lower energy storage spring 51 or the upper energy storage spring 52 to perform unidirectional energy storage based on various considerations. This structure is also within the protection scope of the present utility model.

[0036] like Figure 3 and Figure 6 As shown, a spring placement groove 401 for placing the upper energy storage spring 52 is formed at the top of the output bracket 40; and connecting blocks 402 for hanging the ends of the lower energy storage spring 51 are arranged on both sides of the output bracket 40. When working in the forward direction, the upper energy storage spring 52 and the lower energy storage spring 51 simultaneously apply thrust and pull to the output bracket 40. The two forces disperse the force position and magnitude on the casing or the inner bracket, reduce the strength and rigidity requirements of the casing or the inner bracket, and at the same time, the spring force is weakened, which increases the life of the energy storage mechanism, so that there is almost no inertial force to interfere with the vibration of the whole machine during energy storage, and the worker has a good sense of use during use and is not prone to fatigue.

[0037] like Figure 1 , Figure 3 , Figure 7 and Fig. 9 As shown in the figure, a lock release trigger mechanism 7 is also arranged in the housing 1. Figure 2 and Figure 5As shown, the lock release trigger mechanism 7 includes a contact switch 71 disposed in the handle portion 12 of the housing 1 and a trigger 72 that can move relative to the contact switch 71. The trigger 72 moves relative to the handle portion 12 and abuts against or moves away from the contact switch 71 to trigger the start and stop of the linear motor 2 and trigger the lock release mechanism 6 to operate.

[0038] Further, such as Figure 2 and Figure 5 As shown, the inner surface of the trigger 72 is formed with a groove for placing a reset spring 721. The trigger 72 is formed with a trigger block 722 protruding from its outer surface on the side wall close to the output bracket 40; the movement of the trigger block 722 in the triggered state is used to drive the rotating part 73 pivotally connected to the housing 1 or the inner bracket 11 to rotate.

[0039] In a preferred embodiment, the rotating portion 73 is coaxially arranged with the lock release mechanism 6, the rotating portion 73 is located above the lock release mechanism 6, and a step structure abutting against each other is formed between the bottom of the rotating portion 73 and the bottom end of the lock release mechanism 6. Figure 2 and Figure 5 The elastic pawl mechanism shown in the figure can be an elastic automatic reset telescopic mechanism or an elastic automatic reset torsion mechanism. Further, an elastic automatic reset telescopic mechanism is preferred in the utility model. Specifically, the elastic pawl mechanism includes a pawl body 731, a fixed block and an upper spring 732. The pawl body 731 corresponds to the trigger block 722; when the trigger block 722 is in the triggered state, it drives the rotating part 73 to rotate to the tilted extreme position by pushing the pawl body 731, and compresses the upper spring 732 until the pawl body 731 is disengaged from the trigger block 722, and at the same time drives the lock release mechanism 6 to be released. After the lock release mechanism 6 is released, the upper spring 732 drives the pawl body 731 to reset, and at the same time, the rotating part 73 is reset.

[0040] The housing 1 is also provided with Figure 2 and Figure 5 The lock release mechanism 6 shown in the figure comprises a moving part 61 movably arranged in the housing 1 or the inner bracket 11 and a blocking part 62 fixed on the output bracket 40. A step surface 621 is formed in the blocking part 62, and the step surface 621 abuts against or disengages from the moving part output end 611 in the moving part 61 to achieve locking and working of the whole machine. Figure 2 As shown, when the lock release mechanism 6 is locked, the moving part output end 611 on the moving part 61 abuts against the step surface 621 of the blocking part 62 and limits the axial positive movement of the output bracket 40. Figure 5As shown, when the lock release mechanism 6 is released, the rotating part 73 rotates, driving the moving part 61 to move in the disengagement direction of the housing 1 until the moving part output end 611 of the moving part 61 is disengaged from the step surface 621 of the blocking part 62, so that the moving part 61 withdraws from the moving path of the output bracket 40, so that the output component 4 enters the forward working state.

[0041] Furthermore, the movable part 61 is also provided with a lower spring 612. When the lock-release mechanism 6 is locked, the lower spring 612 is in a normal state and applies a force to the movable part output end 611 to make it abut against the step surface 621. When the lock-release mechanism 6 is released, the lower spring 612 gradually contracts and drives the movable part output end 611 to move toward the inner bracket 11 until the movable part output end 611 is separated from the step surface 621. After the movable part output end 611 is separated from the step surface 621, the lower spring 612 pushes the movable part output end 611 to immediately return to a normal state. When the linear motor 2 drives the output bracket 40 and the blocking part 62 to move toward the second extreme position (the top end of the inner bracket 11), the upper part of the blocking part 62 will exert a force on the output end 611 of the movable part, so that the lower spring 612 gradually contracts until the blocking part 62 moves to the second extreme position. At the same time, the movable part 61 abuts against the blocking part 62 under the action of the lower spring 612 and returns to the locked state again.

[0042] In the second embodiment, if Figure 8 and Fig.10As shown, in this embodiment, the blocking portion 62 is preferably a U-shaped energy storage structure, the notch of which can be used to place a spring, and its lower surface can selectively contact the moving portion 61. The U-shaped energy storage structure is separated from the output bracket 40 before assembly, but after assembly, under the force applied thereto, the U-shaped energy storage structure and the corresponding surface of the output bracket 40 are in contact. The rotating portion 73 is arranged to abut against the lock release mechanism 6, and the rotating portion 73 applies a force to the moving portion 61 through the trigger transmission member 63; the distal end of the rotating portion 73 abuts against the trigger transmission member 63. The trigger transmission member 63 is in an inverted U shape, and a wedge-shaped surface 631 is formed at its open end to cooperate with the top end of the moving portion 61; the main body of the moving portion 61 abuts against the blocking portion 62. In the locked state, the rotating part 73 is substantially horizontal, and its distal end abuts against the upper surface of the trigger transmission member 63, and the lower end surface of the trigger transmission member 63 abuts against the moving part 61, and the moving part output end 611 is located on the lower surface of the blocking part 62, and limits the axial movement of the output bracket 40. In the released state, the rotating part 73 is gradually tilted under the drive of the trigger 72, and in this process, the rotating part 73 drives the trigger transmission member 63 to move in the direction of the lower energy storage spring 51, and then drives the moving part 61 to move toward the side wall of the housing 1, until the moving part output end 611 of the moving part 61 is disengaged from the lower surface of the blocking part 62, so that the moving part 61 withdraws from the moving path of the output bracket 40, so that the output assembly 4 enters the positive working state. When the output end 611 of the moving part is separated from the lower surface of the blocking part 62, the moving part 61 will be reset under the action of the lower spring 612, and the trigger transmission member 63 will be reset under the joint action of the moving part 61 and the rotating part 73. When the linear motor 2 drives the output bracket 40 and the blocking part 62 to move toward the second limit position (the top of the inner bracket 11), the blocking part 62 will apply a force to the output end 611 of the moving part, so that the lower spring 612 gradually contracts until the blocking part 62 moves to the second limit position, and the moving part 61 abuts against the blocking part 62 under the action of the lower spring 611, and returns to the locked state again.

[0043] Therefore, the present invention will trigger the lock release mechanism 6 by the lock release trigger mechanism 7 to release the output assembly 4; that is, the output assembly 4 has two states: forward working and return. When the output assembly 4 is in the forward working state, the linear motor 2 drives the output assembly 4 to move in the output direction, and the spring force of the energy storage mechanism 5 is superimposed on the driving force of the linear motor 2 to enhance the forward working of the output working member 41. When the output assembly 4 is in the return state, the linear motor 2 drives the output assembly 4 to reset, and the energy storage mechanism 5 stores energy, and the lock release mechanism 6 can be locked with the output assembly 4 in the second extreme position to lock energy.

[0044] The following is a brief description of the control method and steps of an energy-saving and efficient linear motion tool disclosed by the utility model:

[0045] S1, the lock release mechanism 6 is unlocked by the lock release trigger mechanism 7, and the linear motor 2 is started; that is, the trigger 72 on the lock release trigger mechanism 7 is pressed, and the trigger block 722 on the trigger 72 drives the rotating part 73 to rotate to the limit position, thereby driving the moving part 61 on the lock release mechanism 6 to disengage from the blocking part 62, so as to release the lock release mechanism 6. At the same time, when the trigger 72 moves to the limit position, it will be connected to the contact switch 71 to trigger the start signal of the linear motor 2.

[0046] S2, the linear motor 2 is powered on in the forward direction, and the power-on time is T1; the linear motor 2 drives the output component 4 to enter the forward working state; at the same time, the spring force of the energy storage mechanism 5 is superimposed to push the output component 4 to the first limit position (the lower end of the inner bracket 11). When working in the forward direction, the upper energy storage spring 52 in the energy storage mechanism 5 applies a downward force to the output bracket 40 on the output component 4, and at the same time, the lower energy storage spring 51 in the energy storage mechanism 5 applies a downward pulling force to the output bracket 40, which, combined with the driving force of the linear motor 2, can effectively reduce the energy provided by the linear motor for forward work.

[0047] S3, the linear motor 2 is powered on in the reverse direction for a power-on time of T2; the linear motor 2 drives the output component 4 to enter the return state; at the same time, the energy storage mechanism 5 stores energy, and finally, the output component 4 is in the second extreme position (the top of the inner bracket 11). During the return stroke, the upper energy storage spring 52 applies an upward pulling force to the output bracket 40, and at the same time, the lower energy storage spring 51 applies an upward thrust to the output bracket 40. At this time, the reverse power-on time T2 of the linear motor 2 can be controlled to be not less than the forward power-on time T1; in order to reduce the duration of the forward work, the T1 and T2 durations can be adjusted according to the energy required by different media, which also increases the number of effective work per unit time and saves energy at the same time.

[0048] S4, the lock-release mechanism 6 is locked with the output assembly 4 at the second limit position; that is, the moving portion 61 abuts against the blocking portion 62 to limit the axial movement of the output bracket 40.

[0049] In other embodiments, the upper energy storage spring 52 and the lower energy storage spring 51 in the energy storage mechanism 5 can be used selectively, that is, the energy storage mechanism 5 can include the upper energy storage spring 52 or the lower energy storage spring 51 .

[0050] In addition, a safety bolt may be provided at the corresponding position of the lock release mechanism, lock release trigger mechanism or trigger for safety reinforcement, or a secondary series trigger safety connection of the switch may be provided for safety reinforcement, etc., which is not the focus of the present utility model and will not be elaborated in detail in the present utility model.

[0051] There are many implementation methods of the utility model, such as the lock release mechanism uses a ratchet rotating elastic mechanism instead of the telescopic mechanism of the embodiment, and the lock release mechanism uses a blooming elastic body combined with a corresponding lock release trigger mechanism to achieve a lock release blocking effect. The linear motion tool of the utility model can also be an electric hammer, an electric pick, etc., which completely relies on the linear motor to do work in the forward direction and store energy in the reverse direction without setting a lock release mechanism and a lock release trigger mechanism. Such structures also fall within the protection scope of the utility model.

[0052] All technical solutions formed by equivalent transformation or equivalent transformation also fall within the protection scope of the present utility model.

Claims

1. An energy-saving and efficient linear motion tool, comprising a housing (1), a linear motor (2) and an output assembly (4) for receiving power from the linear motor (2) arranged in the housing (1), the output assembly (4) comprising an output bracket (40) and an output working member (41) fixed to each other; characterized in that: The housing (1) is further provided with an energy storage mechanism (5), a lock release mechanism (6) and a lock release trigger mechanism (7); the lock release trigger mechanism (7) triggers the lock release mechanism (6) to release the output component (4); the output component (4) has two states: forward working state and return state; when the output component (4) is in the forward working state, the linear motor (2) drives the output component (4) to move in the output direction, and the spring force of the energy storage mechanism (5) is superimposed on the driving force of the linear motor (2) to enhance the forward working of the output working member (41); when the output component (4) is in the return state, the linear motor (2) drives the output component (4) to reset, and the energy storage mechanism (5) stores energy, and the lock release mechanism (6) can be locked with the output component (4) at the second extreme position to lock the energy.

2. The energy-saving and high-efficiency linear motion tool according to claim 1 is characterized in that: An inner bracket (11) is also provided in the housing (1); the energy storage mechanism (5) comprises a lower energy storage spring (51) and an upper energy storage spring (52); a first end of the lower energy storage spring (51) is connected to both sides of the output bracket (40), and a second end is connected to the inner bracket (11); a first end of the upper energy storage spring (52) is in contact with a top end of the output bracket (40), and a second end is in contact with the inner bracket (11); while the linear reciprocating motion of the linear motor (2) drives the output bracket (40) to reciprocate along the setting direction of the output working member (41), the lower energy storage spring (51) and the upper energy storage spring (52) are staggered and extended to store energy, and can generate spring forces in the same direction for superposition.

3. The energy-saving and high-efficiency linear motion tool according to claim 2 is characterized in that: A spring placement groove (401) for placing the upper energy storage spring (52) is formed at the top of the output bracket (40); and connecting blocks (402) for hanging the ends of the lower energy storage spring (51) are provided on both sides of the output bracket (40).

4. The energy-saving and high-efficiency linear motion tool according to claim 3 is characterized in that: A guide member (53) is provided inside the housing (1) or the inner bracket (11), and the guide member (53) is parallel to the output working member (41); the linear motor (2) drives the output bracket (40) to move axially along the guide member (53).

5. The energy-saving and high-efficiency linear motion tool according to claim 1, characterized in that: The lock-release trigger mechanism (7) comprises a contact switch (71) arranged in a handle portion (12) of the housing (1) and a trigger (72) movable relative to the contact switch (71); the trigger (72) moves relative to the handle portion (12) and abuts against or moves away from the contact switch (71) to trigger the linear motor (2) to start or stop, and simultaneously trigger the lock-release mechanism (6) to operate.

6. The energy-saving and high-efficiency linear motion tool according to claim 5, characterized in that: The inner surface of the trigger (72) is formed with a groove for accommodating a return spring (721); the side wall of the trigger (72) close to the output bracket (40) is formed with a trigger block (722) protruding from its outer surface; the movement of the trigger block (722) in the triggered state is used to drive the rotating part (73) pivotally connected to the housing (1) or the inner bracket (11) to rotate.

7. The energy-saving and high-efficiency linear motion tool according to claim 6, characterized in that: An elastic pawl mechanism is provided on the rotating portion (73), the elastic pawl mechanism comprising a pawl body (731), a fixed block and an upper spring (732); the pawl body (731) corresponds to the trigger block (722); when in a triggered state, the trigger block (722) drives the rotating portion (73) to rotate to an extreme tilted position by pushing the pawl body (731), and compresses the upper spring (732) until the pawl body (731) is disengaged from the trigger block (722), and drives the lock release mechanism (6) to be released.

8. The energy-saving and high-efficiency linear motion tool according to claim 6, characterized in that: The lock-release mechanism (6) comprises a moving part (61) movably arranged in the housing (1) or the inner bracket (11) and a blocking part (62) fixed on the output bracket (40); when the lock-release mechanism (6) is locked, the moving part (61) abuts against the blocking part (62) and restricts the output bracket (40) from moving in the axial positive direction; the moving part (61) disengages from the blocking part (62) so that the moving part (61) exits the moving path of the output bracket (40), so that the output assembly (4) enters a positive working state.

9. The energy-saving and high-efficiency linear motion tool according to claim 8, characterized in that: The rotating part (73) is arranged to abut against the lock-release mechanism (6); the rotating part (73) applies a force to the moving part (61) through the trigger transmission member (63); the distal end of the rotating part (73) abuts against the trigger transmission member (63); the trigger transmission member (63) is in an inverted U shape, and a wedge-shaped surface (631) is formed at its open end to cooperate with the top end of the moving part (61); the main body of the moving part (61) abuts against the blocking part (62).

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