Damping type linear reciprocating tool

Abstract

The damping type linear reciprocating tool comprises a linear motor and an output assembly which are arranged in a machine shell, and an energy storage mechanism and a force conversion mechanism fixedly arranged on the energy storage mechanism are further arranged in the machine shell; the force conversion mechanism comprises a conversion input part, a conversion output part, a hollow cylinder body and a force conversion body; one end of the conversion input part is connected with the energy storage mechanism, and the other end is telescopically matched with the hollow cylinder body; the hollow cylinder body is hollow and is internally provided with a force conversion body; the energy storage mechanism drives the force conversion mechanism to be stressed from the conversion input part in the energy storage process, drives the force conversion body in the hollow cylinder body to move along the inner wall of the hollow cylinder body, and converts the magnitude and direction of the force to the conversion output part; and the conversion output part outputs an applied force in a direction different from that of the stress and applies the applied force to the shell. The device has the beneficial effects that the acting force applied by the energy storage mechanism to the machine shell is reduced through the force conversion mechanism, and a man-machine is more comfortable.

Description

Technical Field

[0001] The invention belongs to the technical field of electric tools, and in particular relates to a shock-absorbing linear reciprocating tool. Background Art

[0002] A linear reciprocating tool refers to a tool that performs work by driving the working head to reciprocate through a motor. As a commonly used linear reciprocating tool, electric nail guns are widely used in industries such as construction and furniture manufacturing to quickly and efficiently fix nails on various materials. At present, in the existing electric nail gun technology, some new internal structures have been proposed by the applicant, such as patent application CN202410655073.8 "Energy-saving and High-efficiency Linear Motion Tool and Control Method Thereof", but none of them explain how to solve technical problems such as low vibration. Specifically, during the use of the electric nail gun, that is, in the action of preparing to nail, the force applied by the upper spring and the lower spring in the energy storage mechanism will directly act on the casing. This direct force will cause the casing to vibrate, which is then transmitted to the operator, causing discomfort in the operation. After long-term use of this electric nail gun, the operator's hands may feel numb, which not only affects the comfort of operation, but also reduces work efficiency.

[0003] In order to solve the above problems, designing a linear reciprocating tool with a shock-absorbing function is an important technical problem that the technicians in this field need to solve. To this end, the applicant has proposed an improved method, such as patent application CN202411176949.7 "Shock-absorbing linear reciprocating tool and its control method", which discloses a reaction mechanism arranged on the energy storage mechanism, which includes an upper lever, a lower lever and a connecting rod; the upper lever is provided with an upper shaft fulcrum, a passive reaction point and an upper force point, and the passive reaction point and the upper force point are located on the same side of the upper shaft fulcrum; the lower lever is provided with a lower shaft fulcrum, an active reaction point and a lower force point, and the lower force point and the active reaction point are located on both sides of the lower shaft fulcrum; the connecting rod is connected to the passive reaction point and the active reaction point, so that the reverse force of the active reaction point of the lower lever is opposite to the positive force direction of the passive reaction point of the upper lever. Although this mechanism can be used to solve the low vibration problem to a certain extent, the mutual connection among the upper lever, the lower lever and the connecting rod, as well as the pivot connection structure between the upper lever and the casing are very complicated and extremely difficult to assemble; and most importantly, the size of the upper energy storage spring force and the size of the lower energy storage spring force have corresponding requirements on the respective lever ratios of the upper lever and the lower lever. The sizes of the two spring forces are difficult to accurately measure due to the manufacturing process and assembly, which leads to a sharp increase in the difficulty of debugging. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems existing in the prior art and to provide a shock-absorbing linear reciprocating tool.

[0005] The purpose of the present invention is achieved through the following technical solutions: A shock-absorbing linear reciprocating tool comprises a housing, wherein a linear motor and an output assembly receiving power from the linear motor are arranged in the housing, wherein the output assembly comprises an output bracket and an output working member; an energy storage mechanism and a force conversion mechanism arranged on the energy storage mechanism are also arranged in the housing; the energy storage mechanism comprises an energy storage bracket, an upper energy storage spring and / or a lower energy storage spring; the force conversion mechanism comprises a hollow cylinder, a force conversion body, and a conversion input part and at least one conversion output part arranged on the hollow cylinder, wherein the hollow cylinder is fixed to The casing is hollow inside, and the force conversion body is arranged in the hollow part. The conversion input part and the conversion output part are respectively located at two ends of the force conversion body, and the conversion input part is fixedly connected to the energy storage bracket. During the energy storage process, the energy storage mechanism drives the force conversion mechanism to receive force F from the conversion input part, drives the force conversion body in the hollow cylinder body to move along the inner wall of the hollow cylinder body, and converts the force size and direction to the conversion output part; at the same time, the conversion output part outputs a force F' in a different direction from the force F and applies it to the casing.

[0006] Preferably, the first end of the upper energy storage spring abuts against the upper force-bearing part of the energy storage bracket and acts on the upper force-bearing part, and the second end abuts against the output bracket; and / or the first end of the lower energy storage spring is hooked on the output bracket, and the second end is hooked on the lower force-bearing part of the energy storage bracket.

[0007] Preferably, the conversion output part is a first output part, which is set in a direction completely opposite to that of the conversion input part, and the first output part outputs a force F' in a direction opposite to the force F and applies it to the housing.

[0008] Preferably, the conversion output part also includes two groups of output parts, namely a second output part and a third output part in opposite directions; the force conversion mechanism also includes a shock-absorbing bracket arranged on the periphery of the hollow cylinder body, the second output part and the third output part are located inside the shock-absorbing bracket and are respectively located on both sides of the hollow cylinder body; the free ends of the second output part and the third output part are respectively abutted against the inner wall of the shock-absorbing bracket; during the energy storage process, the energy storage mechanism drives the force conversion mechanism to receive force from the conversion input part, drives the force conversion body in the hollow cylinder body to move along the inner wall of the hollow cylinder body, and converts the force size and direction to the second output part and the third output part; at the same time, the second output part and the third output part output two groups of forces of equal size and opposite direction, which are applied to the shock-absorbing bracket for synthesis.

[0009] Preferably, the hollow cylinder body has an input port, the conversion input part is inserted into the hollow cylinder body, the conversion input part includes an input connector and an input sleeve plug-in fixed to each other, the input connector is fixedly connected to the energy storage bracket, the input sleeve plug-in is inserted into the input port, and the conversion input part and the input port are subjected to force and move relative to each other.

[0010] Preferably, the hollow cylinder has a first output port in the same direction as the input port, and a second output port and a third output port both perpendicular to the input port; The first output part comprises a first output sleeve plug-in and a first elastic member fixed to each other, a first end of the first elastic member abuts against the first output sleeve plug-in, and a second end abuts against the inside of the housing, and the first output sleeve plug-in is inserted into the first output port; The second output part comprises a second output sleeve plug-in and a second elastic member fixed to each other, a first end of the second elastic member abuts against the second output sleeve plug-in, a second end abuts against the inner wall of the shock absorbing bracket, and the second output sleeve plug-in is inserted into the second output port; The third output part comprises a third output sleeve plug-in and a third elastic member fixed to each other, a first end of the third elastic member abuts against the third output sleeve plug-in, and a second end abuts against the inner wall of the shock absorbing bracket, and the third output sleeve plug-in is inserted into the third output port.

[0011] Preferably, a force adjustment mechanism is also provided on the hollow cylinder body; the interior of the force adjustment mechanism is connected to the hollow interior of the hollow cylinder body, and a threaded structure is provided at the tail thereof for telescopically adjusting the volume of the hollow interior of the hollow cylinder body.

[0012] Preferably, the force conversion body is a liquid or a solid that can move in the hollow part of the hollow cylinder. When the force conversion body is a liquid, sealing rings are arranged on the peripheries of the input sleeve plug-in, the first output sleeve plug-in, the second output sleeve plug-in and the third output sleeve plug-in.

[0013] Preferably, the force conversion body is a rust-proof lubricating liquid or a group of steel balls.

[0014] Preferably, the hollow cylinder has a first output port in the same direction as the input port, and a second output port and a third output port both perpendicular to the input port; The first output part comprises a first output sleeve-type elastic body, a first end of the first output sleeve-type elastic body abuts against the force conversion body, a second end of the first output sleeve-type elastic body abuts against the inside of the housing, and the first output sleeve-type elastic body is inserted into the first output port; The second output part comprises a second output sleeve-type elastic body, a first end of the second output sleeve-type elastic body abuts against the force conversion body, a second end abuts against the inner wall of the shock-absorbing bracket, and the second output sleeve-type elastic body is inserted into the second output port; The third output part comprises a third output sleeve-type elastic body, a first end of the third output sleeve-type elastic body abuts against the force conversion body, a second end abuts against the inner wall of the shock-absorbing bracket, and the third output sleeve-type elastic body is inserted into the third output port.

[0015] Preferably, the energy storage mechanism also includes a guide rod bracket and at least one guide rod, the two ends of the guide rod are fixedly connected to the upper and lower surfaces of the guide rod bracket, and the output bracket moves along the setting direction of the guide rod; the upper energy storage spring is sleeved on the guide rod; a buffer spring is also provided at the bottom end of the guide rod, and the two ends of the buffer spring are respectively abutted against the energy storage bracket and the guide rod bracket.

[0016] The advantages of the technical solution of the present invention are mainly reflected in: The force conversion mechanism allows the energy storage mechanism to output the force of the housing or the bracket to the shock-absorbing bracket of the conversion output part to synthesize the positive and negative forces, and the resultant force is almost zero; finally, the force applied by the bracket or the housing is always smaller than the force applied by the energy storage spring in the prior art to the housing or the bracket, so that the effective work efficiency can be ensured during use, while the vibration of the whole machine is smaller, and the comfort of use is higher; By adjusting the position, direction and quantity of the transformation output part, the magnitude and direction of the force can be changed, thereby optimizing the working characteristics of the whole machine. For example, the electric pick and nail gun need to work in a downward direction for better results. The spring force of the energy storage mechanism and the restoring force of the shock absorbing mechanism are 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. The buffer spring plays a buffering and shock-absorbing role on the output component when doing work in the forward direction, effectively preventing the output component from directly acting on the bracket or the casing, causing the bracket or the casing to crack or deform and affect the use, thereby extending the service life of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 : A first direction cross-sectional view of the first embodiment of the present invention in a forward working state; Figure 2 : A second direction cross-sectional view of the first embodiment of the present invention in a forward working state; Figure 3: A hidden perspective view of the housing in the forward working state of the first embodiment of the present invention; Figure 4 : A cross-sectional view in the first direction of the energy storage state of the first embodiment of the present invention; Figure 5 : A second directional cross-sectional view of the energy storage state of the first embodiment of the present invention; Figure 6 : A hidden perspective view of the housing in the energy storage state of the first embodiment of the present invention; Figure 7 : A three-dimensional diagram of a force conversion mechanism according to a first embodiment of the present invention; Figure 8 : A cross-sectional view in the first direction of the force conversion mechanism of the first embodiment of the present invention; Fig. 9 : A second direction projection diagram of the force conversion mechanism of the first embodiment of the present invention; Fig.10 : A cross-sectional view in the first direction of the second embodiment of the present invention in a forward working state; Fig.11 : A cross-sectional view in the first direction of the energy storage state of the second embodiment of the present invention; Fig.12 : A hidden stereoscopic view of the shell in the energy storage state of the second embodiment of the present invention. DETAILED DESCRIPTION

[0018] The purpose, advantages and features of the present invention will be illustrated and explained by 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.

[0019] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0020] The present invention discloses a shock-absorbing linear reciprocating tool, which includes but is not limited to electric nail guns, rivet guns, electric picks, etc. As shown in the figure, taking the electric nail gun listed in the present invention as an example, it has a housing 6, in which a linear motor 1 and an output component 2 receiving power from the linear motor 1 are arranged, and power is transmitted between the two through a transmission rod 102.

[0021] The output component 2 includes: Figure 1-Figure 6 and Figure 10-12 The output bracket 20 and the output working member 21 are fixed to each other. The output bracket 20 includes a working bracket 201 and a spring bracket 202 fixed to each other; the bottom end of the working bracket 201 is provided with the output working member 21 for outputting nails. The above structure is the prior art, and the present invention will not repeat its specific structure.

[0022] In the present invention, the housing 6 is also provided with Figure 1-Figure 6 or Figure 10-12 The energy storage mechanism 3 shown in the figure starts to work when the linear motor 1 drives the output assembly 2 to move; and the energy storage mechanism 3 has two states: an energy storage enhancement state and an energy storage release state. Figure 1-Figure 6 and Figure 10-12 As shown, a guide rod bracket 7 is fixedly disposed in the housing 6 . In the present invention, preferably two guide rod brackets 7 are disposed with an interval up and down. The energy storage mechanism 3 is disposed between the two guide rod brackets 7 .

[0023] The energy storage mechanism 3 includes at least one guide rod 30, both ends of which are fixedly connected to the guide rod bracket 7, and the output bracket 20 moves along the axial direction of the guide rod 30. It is particularly noted that the guide rod bracket 7 is designed for easy assembly in the two embodiments of the present invention, and the guide rod 30 can also be directly fixed in the housing 6 for cost considerations, that is, the guide rod bracket 7 is discarded.

[0024] The energy storage mechanism 3 further includes an upper energy storage spring 31 and a lower energy storage spring 32. The upper energy storage spring 31 is sleeved on the guide rod 30, and the lower energy storage spring 32 is hooked on the guide rod bracket 7 (or the housing 6). The lower energy storage spring 32 is preferably a tension spring, and the upper energy storage spring 31 is preferably a compression spring, so that the movement direction and force direction of the upper energy storage spring 31 and the lower energy storage spring 32 are always consistent during the use of the electric nail gun.

[0025] The present invention preferably uses the upper energy storage spring 31 and the lower energy storage spring 32 at the same time, which can reduce the strength and rigidity requirements of the overall structure and reduce the cost of the overall machine; when the overall structure meets the requirements, the upper energy storage spring 31 or the lower energy storage spring 32 can be used alone to realize the energy storage function, and the effect is the same.

[0026] The energy storage mechanism 3 also includes an energy storage bracket 4. The energy storage bracket 4 is a component, and includes an upper force-bearing portion 41 of the energy storage bracket, a lower force-bearing portion 42 of the energy storage bracket, and a fixed connection portion 43; the fixed connection portion 43 is located between the upper force-bearing portion 41 of the energy storage bracket and the lower force-bearing portion 42 of the energy storage bracket, and fixedly connects the two to form a whole. The energy storage bracket 4, the upper energy storage spring 31, and the lower energy storage spring 32 realize the energy storage enhancement and energy storage release functions.

[0027] Specifically, the first end of the upper energy storage spring 31 is fixed to the upper force bearing portion 41 of the energy storage bracket and acts on the upper force bearing portion 41, and the second end is fixed to the spring bracket 202 of the output bracket 20. The first end of the lower energy storage spring 32 is hooked on the spring bracket 202 of the output bracket 20, and the second end is hooked on the lower force bearing portion 42 of the energy storage bracket 4.

[0028] When the output component 2 is in the forward working state, that is, the linear motor 1 drives the output component 2 from the second extreme position ( Figure 4-Figure 6 shown position) to the first extreme position ( Figure 1-Figure 3 The energy storage mechanism 3 is in an energy storage release state, and the spring forces of the lower energy storage spring 32 and the upper energy storage spring 31 are superimposed on the driving force output by the linear motor 1, so as to enhance the positive work of the output working member 21, speed up the moving speed and work efficiency of the output component 2, and ensure the effective work of the linear motion tool.

[0029] When the output component 2 is in the return state, that is, the linear motor 1 drives the output component 2 from the first limit position ( Figure 1-Figure 3 shown position) to the second extreme position ( Figure 4-Figure 6 The energy storage mechanism 3 is in an energy storage enhancement state, ready for the next positive action.

[0030] Those skilled in the art are well aware that the energy storage bracket 4 can also be an independent part or other shapes. If only the upper energy storage spring 31 is provided to store energy, the energy storage bracket 4 is only provided with the structure of the upper force-bearing part 41 of the energy storage bracket, or if only the lower energy storage spring 32 is provided to store energy, the energy storage bracket 4 is only provided with the structure of the lower force-bearing part 42 of the energy storage bracket.

[0031] Furthermore, a buffer spring 33 is provided at the bottom end of the guide rod 30, and the two ends of the buffer spring 33 are respectively in contact with the energy storage bracket 4 and the guide rod bracket 7 (or housing 6). The buffer spring 33 plays a buffering and shock-absorbing role on the working bracket 201 during forward working, effectively preventing the output component 2 from directly acting on the guide rod bracket 7 (or housing 6), causing the guide rod bracket 7 (or housing 6) to crack or deform and affect the use, thereby extending the service life of the whole machine.

[0032] Combination Figure 1-Figure 12 As shown, the present invention is characterized in that: a force conversion mechanism 5 is also provided on the guide rod bracket 7 in the housing 6. The force conversion mechanism 5 has a certain buffering effect in both states of the energy storage mechanism 3; when the energy storage mechanism 3 is in the energy storage enhancement state, the force conversion mechanism 5 has an obvious effect; when the energy storage mechanism 3 is in the energy storage release state, it plays an appropriate work enhancement role.

[0033] Specifically, Figure 1-Figure 9 The force conversion mechanism 5 of the first embodiment of the present invention is disclosed, and the force conversion mechanism 5 comprises a hollow cylinder 52, a force conversion body 55, and a conversion input part 50 and a conversion output part arranged on the hollow cylinder 52. The hollow cylinder 52 is fixed in the housing 6 and is hollow inside, and the force conversion body 55 is arranged in the hollow part.

[0034] In the first embodiment, the force conversion mechanism 5 includes three conversion output parts, namely, a first output part 51, a second output part 54 and a third output part 57. A force conversion body 55 is arranged between the conversion output part and the conversion input part 50. It should be noted that the first output part 51, the second output part 54 and the third output part 57 can be selectively arranged according to the internal structure of the housing 6, and it is well known to those skilled in the art that the arrangement directions of the first output part 51, the second output part 54 and the third output part 57 are not unique and can be adjusted according to the actual structure.

[0035] The conversion input part 50 is fixedly connected to the energy storage bracket 4. Specifically, the hollow cylinder 52 has an input port 522. The conversion input part 50 is inserted into the hollow cylinder 52. The conversion input part 50 includes an input connector 501 and an input sleeve plug 502 fixed to each other. The input connector 501 is fixedly connected to the energy storage bracket 4, and the input sleeve plug 502 is inserted into the input port 522. When the energy storage mechanism 3 is in the energy storage enhancement state, the energy storage mechanism 3 applies force to the conversion input part 50 through the energy storage bracket 4, and the conversion input part 50 moves relative to the input port 522 after being subjected to the force.

[0036] The hollow cylinder 52 has a first output port 521 in the same direction as the input port 522 , and a second output port 523 and a third output port 525 which are both arranged perpendicularly and in opposite directions to the input port 522 .

[0037] The first output part 51 is arranged in a completely opposite direction to the conversion input part 50. Specifically, the first output part 51 includes a first output sleeve plug-in 503 and a first elastic member 504 fixed to each other, a first end of the first elastic member 504 abuts against the first output sleeve plug-in 503, and a second end abuts against the inside of the housing 6, and the first output sleeve plug-in 503 is inserted into the first output port 521.

[0038] During the energy storage process, the energy storage mechanism 3 drives the force conversion mechanism 5 to receive the force F from the conversion input part 50, drives the force conversion body 55 in the hollow cylinder 52 to move along the inner wall of the hollow cylinder 52, and converts the magnitude and direction of the force to the conversion output part; at the same time, the conversion output part outputs a force F' in a direction different from the force F and applies it to the housing 6. For example, for the first output part 51, the first output part 51 outputs a force F' in a direction opposite to the force F and applies it to the housing 6.

[0039] Preferably, in the first embodiment of the present invention, the conversion output part further includes two groups of output parts, namely, a second output part 54 and a third output part 57 in opposite directions. The force conversion mechanism 5 further includes a shock-absorbing bracket 53 arranged on the periphery of the hollow cylinder 52, the second output part 54 and the third output part 57 are located inside the shock-absorbing bracket 53 and are respectively located on both sides of the hollow cylinder 52; the free ends of the second output part 54 and the third output part 57 are respectively abutted against the inner wall of the shock-absorbing bracket 53. The shock-absorbing bracket 53 is integrally distributed and arranged outside the hollow cylinder 52 without interference, which is convenient for assembly and facilitates the balanced adjustment of the output forces of the conversion output part 54 and the conversion output part 57.

[0040] The second output portion 54 includes a second output sleeve plug-in 506 and a second elastic member 505 fixed to each other. The first end of the second elastic member 505 abuts against the second output sleeve plug-in 506 , and the second end abuts against the inner wall of the shock absorbing bracket 53 . The second output sleeve plug-in 506 is inserted into the second output port 523 .

[0041] The third output part 57 includes a third output sleeve plug-in 507 and a third elastic member 508 fixed to each other. The first end of the third elastic member 508 abuts against the third output sleeve plug-in 507, and the second end abuts against the inner wall of the shock-absorbing bracket 53. The third output sleeve plug-in 507 is inserted into the third output port 525.

[0042] In the first embodiment of the present invention, the energy storage mechanism 3 drives the force conversion mechanism 5 to receive force from the conversion input part 50 during the energy storage process, drives the force conversion body 55 in the hollow cylinder body 52 to move along the inner wall of the hollow cylinder body 52, and simultaneously converts the force size and direction to the second output part 54 and the third output part 57; the second output part 54 and the third output part 57 output two groups of forces of equal size and opposite direction to be applied to the shock absorbing bracket 53 for synthesis.

[0043] Specifically, when the energy storage mechanism 3 is driven by the linear motor 1 to move toward the second extreme position, the energy storage mechanism 3 is in an energy storage enhancement state; the energy storage mechanism 3 drives the energy storage bracket 4 to apply force to the conversion input part 50, and the conversion input part 50 pushes the force conversion body 55 to move toward the first output part 51, the second output part 54 and the third output part 57. The force conversion body 55 simultaneously pushes the first elastic member 504, the second elastic member 505 and the third elastic member 508 of the elastic member. The first elastic member 504 abuts against the housing 6, so it applies the force F' to the housing 6; the second elastic member 505 and the third elastic member 508 both abut against the shock absorbing bracket 53, and the forces applied by the two on the shock absorbing bracket 53 are equal in magnitude and opposite in direction, and the two forces form a resultant force, which is zero.

[0044] In actual use, the force conversion body 55 is in a balanced state without flow in the initial state. When the energy storage bracket 4 applies force F to the conversion input part 50, the input sleeve plug-in 502 is forced to move. Due to the action force and reaction force, the internal force of the conversion input part 50 is smaller than the external force of the input sleeve plug-in 502, resulting in inward flow. The pressure of other parts of the hollow wall is smaller than the pressure of the input sleeve plug-in 502, so the housing 6 receives the thrust F in the same direction as the input force.

[0045] At the same time, the first output part 51, the second output part 54 and the third output part 57 of the conversion output part also output force F' to the outside (also the external pressure is smaller than the internal pressure). In this way, the resultant force F0=F-F' applied by the force conversion mechanism 5 to the housing is smaller than the force F of the conversion input part. During the machine adjustment process, F' can be adjusted to better achieve the shock absorption effect. Similarly, in the energy storage release state, the force direction is opposite, and the work is superimposed.

[0046] Further explanation, when there is only one first output part 51, the input sleeve plug 502 is forced to push the force conversion body 55, and exerts force on the hollow wall inside the hollow cylinder 52. Since the area around the hollow part is uniform and symmetrical, the corresponding areas of the conversion input part 50 and the first output part 51 are equal, but the directions of the forces on the two are opposite, so there is a force F' corresponding to the conversion input part 50 acting on the housing 6, the direction is opposite to the input force direction, and the force F' tends to drive the machine to abut against the working surface, while reducing vibration. When there are multiple conversion output parts, the output parts can offset each other or the output force can be dispersed, and the vibration is smaller.

[0047] When the energy storage mechanism 3 is in the energy storage enhancement state, the first elastic member 504 , the second elastic member 505 , and the third elastic member 508 store energy in this state.

[0048] When the energy storage mechanism 3 moves forward to the first limit position to perform work as the output assembly 2 is in the return state, the energy storage mechanism 3 is in the energy storage release state. At this time, the energy storage of the first elastic member 504, the second elastic member 505, and the third elastic member 508 is released, pushing the force conversion body 55, and the force conversion body 55 pushes the conversion input part 50 in the reverse direction to apply force to the energy storage bracket 4, and the energy storage bracket 4 pushes the buffer spring 33 to store energy. At the same time, the buffer spring 33 applies force to the housing 6, and the housing 6 has a downward movement trend.

[0049] In order to facilitate assembly and maintenance, the present invention also provides a force adjustment mechanism 56, the interior of which is connected to the hollow part of the hollow cylinder 52 and is filled with a force conversion body 55. The tail 524 of the force adjustment mechanism 56 is provided with a threaded structure to telescopically adjust the volume of the hollow part, and the initial position of the energy storage bracket can be adjusted at the same time.

[0050] In the present invention, the force conversion body 55 is a fluid or a solid that can be converted and moved; preferably, it is a rust-proof lubricating liquid. Specifically, the force conversion body 55 of the first embodiment of the present invention is preferably a rust-proof lubricating liquid, and the outer peripheries of the input sleeve plug-in 502, the first output sleeve plug-in 503, the second output sleeve plug-in 506, and the third output sleeve plug-in 507 are all sleeved with sealing rings 58. The cylindrical upper outer side of the threaded mechanism end of the adjustment mechanism 56 is also sleeved with a sealing ring 58. The sealing ring 58 is preferably an O-ring rubber part.

[0051] like Figures 10 to 12 The second embodiment of the present invention is shown. The force conversion body 55 of the second embodiment of the present invention is preferably a steel ball.

[0052] The difference between the second embodiment and the first embodiment is that the output part layout of the force adjustment mechanism 5 is different, specifically: the hollow cylinder 52 of the force adjustment mechanism 5 adopts a U-shaped hollow tube, one end of the hollow tube is the conversion input part 50, and the other end is the first output part 51. The second embodiment has only one conversion output part. In the forward working state, the first elastic member 504 releases the stored energy and pushes it back to the energy storage mechanism 3 to improve the working efficiency; when the energy storage mechanism 3 is in the energy storage enhancement state, the combined force pushes the housing 6 downward to abut the working surface.

[0053] It should be noted that the first output part, the second output part and the third output part can directly use a sleeve-type elastic part to replace the combination of the input / output sleeve plug and the elastic part of the first and second embodiments. For example, the sleeve-type elastic part can be a rubber part.

[0054] The control method of the shock-absorbing linear reciprocating tool disclosed by the present invention is briefly explained below. The operation steps are as follows: S0, initial state, the energy storage mechanism 3 and the output assembly 2 are between the first extreme position and the second extreme position, and are located near the first extreme position; at this time, the upper energy storage spring 31 in the energy storage mechanism 3 is in a slightly contracted state, and the lower energy storage spring 32 is in a slightly pulled state, and both are in a state of waiting for energy storage.

[0055] S1, start the linear motor 1, and reversely energize the linear motor 1 to drive the output assembly 2 to move to the second limit position. When reaching the second limit position, the upper energy storage spring 31 is compressed to the limit, the lower energy storage spring 31 is extended to the limit, and the energy storage mechanism 3 completes energy storage and is in an energy storage state. During this process, the force conversion mechanism 5 works, so that the force applied by the energy storage mechanism 3 to the guide rod bracket or the housing is close to zero, so as to reduce vibration.

[0056] S2, the linear motor 1 is energized in the forward direction, driving the output assembly 2 to move to the first limit position. When reaching the first limit position, the upper energy storage spring 31 is stretched to the maximum within the stroke, the lower energy storage spring 32 is contracted to the maximum within the stroke, and the energy storage mechanism 3 enters the forward working state. In this process, the energy storage capacity of the force conversion mechanism 5 pushes the energy storage mechanism 3 in the reverse direction, and the energy storage mechanism 3 drives the energy storage mechanism 4 to move in the working direction to add thrust, and the force of the force conversion output part on the casing gradually decreases, which has the effect of moderate adjustment.

[0057] S3, the linear motor 1 drives the output component 2 and the energy storage mechanism 3 to enter the effective return working state; at this time, the buffer spring 33 releases the stored energy, and the stored energy is superimposed on the output component 2 until the output component 2 moves to the initial state in step S0.

[0058] In addition, the present invention also includes a control method for a damped linear reciprocating tool with a lock-release mechanism, wherein the structure of the lock-release mechanism is the prior art of the applicant and is not described in detail. That is, in the initial state, the output assembly 2 of the linear reciprocating tool is placed in the second extreme position by the lock-release mechanism. The operation steps of the damped linear reciprocating tool with a lock-release mechanism are as follows: S0, the initial state is the energy storage state, the energy storage mechanism 3 and the output assembly 2 are in the second extreme position; at this time, the energy storage mechanism 3 is locked.

[0059] S1, start the linear motor 1, and the linear motor 1 is energized in the forward direction, and the energy storage mechanism 3 is released by the lock release mechanism. The linear motor 1 drives the output component 2 to move to the first limit position by superimposing the elastic force of the energy storage mechanism 3 to perform positive work. In this process, the force conversion mechanism 5 is also in an energy release state, and the force applied to the housing 6 is reduced. Specifically, the energy storage mechanism 3 is in an energy release state, and the force conversion mechanism 5 is in an energy release state, and they jointly apply force to the energy storage bracket 4 to superimpose the force of the output component 2, and perform positive work.

[0060] S2, after the linear motor 1 drives the output component 2 to move to the second extreme position after the superposition of the storage capacity, the linear motor reverses the power supply to drive the output component 2 to move to the first extreme position. When the output component 2 reaches the first extreme position, the energy storage mechanism 3 completes the energy storage work. In this process, the energy storage mechanism 3 performs energy storage enhancement, and the force conversion mechanism 5 also performs energy storage enhancement. At the same time, the output part is transformed to synthesize the output force as a whole to maximize vibration reduction. Specifically, the force conversion mechanism 5 is subjected to the force applied by the energy storage bracket 4 of the energy storage mechanism 3, and the input force from the transformation input part 50 drives the force conversion body 55. The force conversion body 55 is converted to the transformation output part in the hollow cylinder body 52. ​​At the same time, the output force of the transformation output part and the force of the force conversion body 55 on the hollow cylinder body 52 on the casing, the combined force of the two is close to zero, so as to play a role in reducing the vibration.

[0061] S3, when the work is finished, the output assembly 2 moves to the second extreme position, and the locking mechanism is locked.

[0062] There are many implementation methods of the present invention, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A shock-absorbing linear reciprocating tool, comprising a housing (6), wherein a linear motor (1) and an output assembly (2) for receiving power from the linear motor (1) are arranged in the housing (6), wherein the output assembly (2) comprises an output bracket (20) and an output working member (21); characterized in that: An energy storage mechanism (3) and a force conversion mechanism (5) disposed on the energy storage mechanism (3) are also disposed in the housing (6); the energy storage mechanism (3) comprises an energy storage bracket (4), an upper energy storage spring (31) and / or a lower energy storage spring (32); the force conversion mechanism (5) comprises a hollow cylinder (52), a force conversion body (55), a conversion input portion (50) and at least one conversion output portion disposed on the hollow cylinder (52); the hollow cylinder (52) is fixed in the housing (6) and is hollow inside; the force conversion body (55) is disposed in the hollow portion; The conversion input part (50) and the conversion output part are respectively located at two ends of the force conversion body (55); the conversion input part (50) is fixedly connected to the energy storage bracket (4); during the energy storage process, the energy storage mechanism (3) drives the force conversion mechanism (5) to receive a force F from the conversion input part (50), drives the force conversion body (55) in the hollow cylinder (52) to move along the inner wall of the hollow cylinder (52), and converts the magnitude and direction of the force to the conversion output part; at the same time, the conversion output part outputs a force F' in a direction different from the received force F and applies it to the housing (6).

2. The shock-absorbing linear reciprocating tool according to claim 1, characterized in that: The first end of the upper energy storage spring (31) abuts against the upper force-bearing portion (41) of the energy storage bracket (4) and acts on the upper force-bearing portion (41), and the second end abuts against the output bracket (20); and / or the first end of the lower energy storage spring (32) is hooked on the output bracket (20), and the second end is hooked on the lower force-bearing portion (42) of the energy storage bracket (4).

3. The shock-absorbing linear reciprocating tool according to claim 1, characterized in that: The conversion output part is a first output part (51), which is arranged in a direction completely opposite to that of the conversion input part (50). The first output part (51) outputs a force F' in a direction opposite to that of the applied force F and applies it to the housing (6).

4. The shock-absorbing linear reciprocating tool according to claim 1 or 3, characterized in that: The conversion output part also includes two groups of output parts, namely a second output part (54) and a third output part (57) in opposite directions; the force conversion mechanism (5) also includes a shock-absorbing bracket (53) arranged on the periphery of the hollow cylinder (52); the second output part (54) and the third output part (57) are located inside the shock-absorbing bracket (53) and are respectively located on both sides of the hollow cylinder (52); the free ends of the second output part (54) and the third output part (57) are respectively connected to the shock-absorbing bracket (53); The energy storage mechanism (3) abuts against the inner wall of the second output part (54) and the inner wall of the third output part (57); during the energy storage process, the energy storage mechanism (3) drives the force conversion mechanism (5) to receive force from the conversion input part (50), drives the force conversion body (55) in the hollow cylinder body (52) to move along the inner wall of the hollow cylinder body (52), and converts the magnitude and direction of the force to the second output part (54) and the third output part (57); at the same time, the second output part (54) and the third output part (57) output two groups of forces of equal magnitude and opposite directions to be applied to the shock absorbing bracket (53) for synthesis.

5. The shock-absorbing linear reciprocating tool according to claim 4, characterized in that: The hollow cylinder (52) has an input port (522), the conversion input part (50) is plug-matched with the hollow cylinder (52), the conversion input part (50) comprises an input connector (501) and an input sleeve plug-in (502) fixed to each other, the input connector (501) is fixedly connected to the energy storage bracket (4), the input sleeve plug-in (502) is inserted into the input port (522), and the conversion input part (50) and the input port (522) are relatively moved under force.

6. The shock-absorbing linear reciprocating tool according to claim 5, characterized in that: The hollow cylinder (52) has a first output port (521) in the same direction as the input port (522), and a second output port (523) and a third output port (525) both perpendicular to the input port (522); The first output portion (51) comprises a first output sleeve plug-in (503) and a first elastic member (504) fixed to each other, a first end of the first elastic member (504) abutting against the first output sleeve plug-in (503), and a second end abutting against the inside of the housing (6), and the first output sleeve plug-in (503) is inserted into the first output port (521); The second output portion (54) comprises a second output sleeve plug-in (506) and a second elastic member (505) fixed to each other, a first end of the second elastic member (505) abutting against the second output sleeve plug-in (506), and a second end abutting against the inner wall of the shock absorbing bracket (53), and the second output sleeve plug-in (506) is inserted into the second output port (523); The third output portion (57) comprises a third output sleeve plug-in (507) and a third elastic member (508) fixed to each other, a first end of the third elastic member (508) abutting against the third output sleeve plug-in (507), and a second end abutting against the inner wall of the shock absorbing bracket (53), and the third output sleeve plug-in (507) is inserted into the third output port (525).

7. The shock-absorbing linear reciprocating tool according to claim 6, characterized in that: The hollow cylinder (52) is also provided with a force adjustment mechanism (56); the interior of the force adjustment mechanism (56) is connected to the hollow interior of the hollow cylinder (52), and the tail (524) thereof is provided with a threaded structure for telescopically adjusting the volume of the hollow interior of the hollow cylinder (52).

8. The shock-absorbing linear reciprocating tool according to claim 7, characterized in that: The force conversion body (55) is a liquid or a solid that is movable in position in the hollow portion of the hollow cylinder (52). When the force conversion body (55) is a liquid, sealing rings (58) are sleeved on the peripheries of the input sleeve plug-in (502), the first output sleeve plug-in (503), the second output sleeve plug-in (506), and the third output sleeve plug-in (507).

9. The shock-absorbing linear reciprocating tool according to claim 5, characterized in that: The hollow cylinder (52) has a first output port (521) in the same direction as the input port (522), and a second output port (523) and a third output port (525) both perpendicular to the input port (522); The first output portion (51) comprises a first output sleeve-type elastic body, a first end of the first output sleeve-type elastic body abuts against the force conversion body (55), a second end abuts against the inside of the housing (6), and the first output sleeve-type elastic body is inserted into the first output port (521); The second output portion (54) comprises a second output sleeve-type elastic body, the first end of the second output sleeve-type elastic body abuts against the force conversion body (55), the second end abuts against the inner wall of the shock-absorbing bracket (53), and the second output sleeve-type elastic body is inserted into the second output port (523); The third output portion (57) comprises a third output sleeve-type elastic body, a first end of the third output sleeve-type elastic body abuts against the force conversion body (55), a second end abuts against the inner wall of the shock-absorbing bracket (53), and the third output sleeve-type elastic body is inserted into the third output port (525).

10. The shock-absorbing linear reciprocating tool according to claim 2, characterized in that: The energy storage mechanism (3) further comprises a guide rod bracket (7) and at least one guide rod (30), the two ends of the guide rod (30) being fixedly connected to the upper and lower surfaces of the guide rod bracket (7), and the output bracket (20) moving along the setting direction of the guide rod (30); the upper energy storage spring (31) is sleeved on the guide rod (30); and a buffer spring (33) is further provided at the bottom end of the guide rod (30), the two ends of the buffer spring (33) respectively abutting against the energy storage bracket (4) and the guide rod bracket (7).

Images