A multi-functional oscillating saw

Abstract

The present invention discloses a multi-functional oscillating saw, comprising: a machine housing, an oscillating shaft structure with a saw blade, an oscillating block structure and a driving structure. A driving part housing is fixedly installed in the inner cavity of the machine housing. The oscillating shaft structure is vertically installed in the inner cavity of the driving part housing through bearings, and the positions of the upper and bottom saw blades on the oscillating shaft structure sequentially pass through the bottom through hole of the driving part housing and the bottom through hole of the machine housing and then extend out of the machine housing; the oscillating block structure is fixedly installed on the oscillating shaft structure in the inner cavity of the driving part housing, and the driving structure for driving the oscillating block structure to reciprocate left and right is installed in the inner cavity of the driving part housing; at least one first shock absorber is arranged between the left side wall of the driving part housing and the left inner cavity wall of the machine housing, and at least one second shock absorber is arranged between the right side wall of the driving part housing and the right inner cavity wall of the machine housing. The multi-functional oscillating saw with the above structure has the advantages of small vibration, low noise, high cutting efficiency and low manufacturing cost.

Description

Technical Field

[0001] The invention relates to the technical field of electric sawing equipment, and in particular to a multifunctional swing saw. Background Art

[0002] The multifunctional oscillating saw is an electric sawing device that drives the saw blade to swing back and forth to the left and right to achieve the purpose of cutting materials. It is also a portable small electric tool.

[0003] like Figure 1 As shown, the commonly used multifunctional swing saw mainly includes: a housing 100, a swing shaft structure 200 with a saw blade 201, a swing block structure 300 with a toggle slot 301, and a saw blade driving device for driving the swing block structure 300 to swing back and forth. The swing shaft structure 200 is vertically installed in the inner cavity of the housing 100 through a bearing, and the saw blade part at the bottom of the swing shaft structure 200 extends out of the housing 100. The swing block structure 300 with the toggle slot 301 is fixedly arranged on the swing shaft structure 200. The saw blade driving device includes: a motor 500 horizontally fixedly arranged in the inner cavity of the housing 100, the axis of the motor shaft 501 of the motor 500 is perpendicular to the swing center line of the swing shaft structure 200, and a spherical bearing 400 is eccentrically arranged on the motor shaft 501 of the motor 500, and the spherical bearing 400 extends into the toggle slot 301 of the swing block structure 300. When the motor 500 drives the spherical bearing 400 to rotate eccentrically relative to the axis of the motor shaft 501, the eccentrically rotating spherical bearing 400 pushes the toggle slot 301 back and forth, causing the swing block structure 300 to swing back and forth relative to the swing center line of the swing shaft structure 200, thereby causing the swing shaft structure 200 to swing back and forth with the saw blade 201.

[0004] The multifunctional swing saw of the above structure has the following main disadvantages: due to the eccentric rotation, the multifunctional swing saw vibrates greatly during use and makes a lot of noise, and the operator needs to expend a lot of gripping force to hold the multifunctional swing saw in working state; in addition, the greater the vibration of the multifunctional swing saw during use, the more difficult it is to control the swing angle of the saw blade, which seriously affects the cutting efficiency. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a multifunctional swing saw with small vibration, small noise, high cutting efficiency and low manufacturing cost.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows: A multifunctional swing saw includes a machine shell, a swing shaft structure with a band saw blade, a swing block structure, and a driving structure. A driving part housing is fixedly installed in the inner cavity of the machine shell. Among them, the machine shell is usually composed of a left half and a right half which are joined together and fastened by a number of fasteners to form a complete machine shell. The driving part housing can be clamped and limited in the inner cavity of the machine shell through a clamping structure in the inner cavity of the machine shell. When the left half and the right half of the machine shell are joined together and fastened by each fastener, the purpose of fixedly installing the driving part housing in the inner cavity of the housing can be achieved. Of course, the driving part housing can also be fixed in the inner cavity of the machine shell by other forms of fixing methods.

[0007] The swing shaft structure is vertically installed in the inner cavity of the driving part housing through bearings, and the positions of the upper and bottom saw blades on the swing shaft structure sequentially pass through the bottom through hole of the driving part housing and the bottom through hole of the machine shell and extend out of the machine shell; the swing block structure is fixedly installed on the swing shaft structure in the inner cavity of the driving part housing, and the driving structure for driving the swing block structure to swing reciprocally left and right is installed in the inner cavity of the driving part housing; at least one first shock absorber is provided between the left side wall of the driving part housing and the left inner cavity wall of the machine shell, and at least one second shock absorber is provided between the right side wall of the driving part housing and the right inner cavity wall of the machine shell.

[0008] We usually divide the machine shell into two parts from front to back: the head housing and the handle housing. The driving part housing is fixedly installed in the inner cavity of the head housing. The rear end of the driving part housing extends backward to form a long strip-shaped balance part housing with a hollow inner cavity. The balance part housing is fixed in the inner cavity of the handle housing, and the inner cavity of the driving part housing is communicated with the inner cavity of the balance part housing. The wiring of the multifunctional swing saw and the like can pass through the inner cavity of the balance part housing.

[0009] In order to further reduce the vibration feeling during the use of the multifunctional saw, at least one third shock absorber is provided between the left side wall of the balance part housing and the left inner cavity wall of the handle housing, and at least one fourth shock absorber is provided between the right side wall of the balance part housing and the right inner cavity wall of the handle housing.

[0010] Among them, each of the first shock absorber, the second shock absorber, the third shock absorber, and the fourth shock absorber can all adopt the same type of shock absorber. There are various styles of shock absorbers. In this solution, the shock absorber preferably adopts a shock spring. To reliably position the shock spring, positioning groove structures can be respectively provided on the inner cavity walls of the driving part housing, the head housing, the balance part housing, and the handle housing corresponding to both ends of each shock spring, so that both ends of the shock spring are respectively located in the corresponding positioning groove structures.

[0011] Furthermore, in the aforementioned multifunctional swing saw, a support plate is sealed at the open opening at the bottom of the driving part cover, a support hole and a through hole penetrating up and down are opened on the support plate, and the support plate is hollowly sleeved on the swing shaft structure through the through hole; the driving structure is as follows: a motor is fixedly arranged in the inner cavity of the driving part cover located behind the swing shaft structure, the motor is placed vertically and the bottom end of the motor shaft of the motor is supported in the support hole of the support plate through a support bearing, a toggle bearing is eccentrically arranged on the motor shaft, and a toggle groove is provided at the rear of the swing block structure, and the toggle bearing is located in the toggle groove of the swing block structure.

[0012] Furthermore, in the aforementioned multifunctional oscillating saw, the oscillating block structure comprises: a horizontally placed oscillating plate, a mounting through hole penetrating up and down is opened at the front of the oscillating plate, the oscillating plate is fixedly mounted on the oscillating shaft structure through the mounting through hole, the toggle groove is located at the rear section of the oscillating plate, and the toggle groove penetrates the rear end surface of the oscillating plate; the toggle groove is composed of a semi-cylindrical first through groove and a rectangular second through groove from front to back, and the first through groove and the second through groove are connected with each other by a smooth transition.

[0013] Furthermore, in the aforementioned multifunctional oscillating saw, the oscillating shaft structure is as follows: the oscillating shaft sleeve is vertically installed in the inner cavity of the driving part cover through a bearing, and the lower end of the oscillating shaft sleeve passes through the bottom through hole of the driving part cover and the bottom through hole of the casing in sequence and then extends out of the casing; the oscillating shaft is vertically movably inserted in the oscillating shaft sleeve, and the upper end of the oscillating shaft extends upward from the upper end of the oscillating shaft sleeve and then passes through the top through hole of the driving part cover and extends into the inner cavity of the casing, and the lower end of the oscillating shaft extends downward from the lower end of the oscillating shaft sleeve and is fixedly connected to the connecting block, the insertion end of the saw blade is inserted between the connecting block and the oscillating shaft sleeve, and a device is provided between the oscillating shaft and the oscillating shaft sleeve to enable the oscillating shaft to move upward relative to the oscillating shaft sleeve, thereby pressing and locking the insertion end of the saw blade. A clamping structure between the connecting block and the swinging shaft sleeve; an unlocking structure for unlocking the clamping force of the connecting block locked on the insertion end of the saw blade is provided between the swinging shaft and the casing, the unlocking structure comprising: a button, one end of the button is a pressing end, and the other end of the button is a cam end with a cam profile surface, the cam end of the button is hinged in the top through hole of the casing above the swinging shaft, when the button is in a horizontal position, the unlocking structure is not unlocked, and the distance from each point on the contour curve of the cam profile surface to the hinge point between the button and the casing gradually increases in a clockwise direction from the lowest point of the contour curve; a locking structure for locking the position of the button in a horizontal position is provided between the button and the casing, and an anti-pinch structure is provided between the button and the casing.

[0014] When the button is in a horizontal position, a gap H2 is left between the upper end of the swing shaft and the lowest end of the cam profile surface to prevent the swing shaft driven by the drive structure from swinging back and forth and causing wear due to contact between the swing shaft and the cam profile surface. The maximum distance from the cam profile surface to the hinge point between the button and the housing is H1, and the minimum distance from the cam profile surface to the hinge point between the button and the housing is H3, H1> the sum of H2 and H3.

[0015] During the process of the button swinging around the hinge point between the button and the housing to a horizontal position, the distance between the button and the housing becomes smaller and smaller. In order to prevent the hand from being caught in the gap between the button and the housing during operation, the present solution provides an anti-pinch structure between the button and the housing. The anti-pinch structure includes: an anti-pinch block, one end of the anti-pinch block is a hinged end, the other end of the anti-pinch block is a butt end, and a shelf block protruding outward is provided on the top surface of the anti-pinch block between the hinged end and the butt end; the hinged end of the anti-pinch block is hinged to the housing behind the cam end of the button through a first hinge shaft, a stopper is provided on the housing between the hinged end of the anti-pinch block and the cam end of the button, a torsion spring is mounted on the first hinge shaft, and under the elastic force of the torsion spring, the anti-pinch block swings counterclockwise around the first hinge shaft until the shelf block abuts against the stopper; a connecting shaft is provided on at least one side of the two side surfaces of the butt end of the anti-pinch block.

[0016] In order to ensure that the inserted end of the saw blade is always in a state of being pressed and locked between the connecting block and the swing sleeve during use, a locking structure is provided between the button and the housing to lock the button in a horizontal position. The locking structure is as follows: a locking member is provided on the housing behind the cam end of the button, and the locking member is formed by a horizontal plate, side baffles that are smoothly bent upward and gradually inward along the two ends of the horizontal plate, and curling edges that are smoothly turned outward along the tops of the two side baffles; the horizontal plate is fixed to the housing, and a clamping groove is formed between the two side baffles; a locking block that protrudes downward and can be clamped in the clamping groove is provided on the bottom surface of the button, and convex strips that protrude outward are provided on the two side surfaces of the locking block.

[0017] Furthermore, the aforementioned multifunctional swing saw has a clamping structure as follows: the inner channel of the swing sleeve is composed of an upper channel and a lower channel from top to bottom to form a step channel structure, and the aperture of the upper channel is smaller than the aperture of the lower channel; an upper stopper is fixedly provided on the swing shaft located in the lower channel, and a lower stopper is fixedly provided on the hole wall of the lower channel, and a compression spring is sleeved on the swing shaft between the upper stopper and the lower stopper, and under the elastic force of the compression spring, the two ends of the compression spring are respectively pressed against the upper stopper and the lower stopper.

[0018] In order to make the pressing and locking of the saw blade between the connecting block and the swinging shaft sleeve more reliable, in this solution, a protruding shoulder is provided at the lower end of the swinging shaft sleeve, and a number of vertically arranged connecting columns are circumferentially and evenly distributed on the bottom surface of the shoulder. Connecting through holes corresponding to the positions of the connecting columns are provided at the insertion end of the saw blade. When the insertion end of the saw blade is pressed and locked between the connecting block and the swinging shaft sleeve under the pressing force of the pressing structure, each connecting column is located in the corresponding connecting through hole

[0019] The beneficial effects of the present invention are as follows: ① The settings of the first shock absorbers, the second shock absorbers, the third shock absorbers, and the fourth shock absorbers can effectively reduce the vibration of the multi-functional swinging saw. The setting of the balance part housing also serves the purpose of reducing vibration. Here, through the combined action of the first shock absorbers, the second shock absorbers, the third shock absorbers, the fourth shock absorbers and the balance part housing, the vibration feeling of the multi-functional swinging saw is greatly reduced; in addition, the reduction of vibration can also reduce noise, ensure the swing angle accuracy of the saw blade, and improve the transmission efficiency and cutting efficiency; ② One end of the motor shaft is supported by the motor, and the other end of the motor shaft is supported by the support bearing installed in the support hole. Therefore, when the motor drives the dial bearing to rotate eccentrically relative to the axis of the motor shaft, the motor shaft is not easily deformed. This can not only ensure that the final swing angle of the saw blade will not become smaller, improve the transmission efficiency and cutting efficiency, but also better protect the dial bearing and improve the service life of the dial bearing; ③ The positional relationship between the dial bearing and the dial groove is that the swing center line of the dial groove is parallel to the rotation center line of the dial bearing. Therefore, there is always a space for the dial groove to swing back and forth left and right between the left and right side surfaces of the dial groove and the outer ring contour of the dial bearing during the movement. Therefore, a low-cost ordinary bearing can be selected for the dial bearing here, reducing the use cost; ④ The saw blade can be quickly replaced without the aid of auxiliary tools and has an anti-pinch function, greatly improving the convenience and safety of using the multi-functional swinging saw. Description of the Drawings

[0020] Figure 1 is a partial structural schematic diagram of the multi-functional swinging saw described in the background art.

[0021] Figure 2 is a structural schematic diagram of the multi-functional swinging saw described in the present invention.

[0022] Figure 3 is a structural schematic diagram of each component in the inner cavity of the machine shell after removing part of the machine shell.

[0023] Figure 4 is a structural schematic diagram of the swinging shaft structure and the driving structure after removing the driving part housing.

[0024] Figure 5 is a structural schematic diagram of the driving structure.

[0025] Figure 6 Yes Figure 4 Schematic diagram of the positions of the swing axis structure, swing block structure, and drive structure in the top-down direction.

[0026] Figure 7 Yes Figure 2 Partial structural schematic diagram of the button part installed on the middle casing.

[0027] Figure 8 Schematic diagram of the position and structure when the button is blocked by the anti-pinch structure.

[0028] Figure 9 Schematic diagram of the position and structure between the button and the locking member.

[0029] Figure 10 Schematic diagram of the position when the unlocking structure is in the unlocked state after the button swings counterclockwise around the second hinge axis.

[0030] Figure 11 Schematic diagram of the position when the button swings clockwise around the second hinge axis to the horizontal position. Detailed implementation mode

[0031] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0032] Embodiment 1

[0033] For convenience of description, in this solution, Figure 2 The position on the left hand side in the shown position is defined as "front", and the position on the right hand side is defined as "rear". At this time, Figure 2 The side of the casing seen in

[0034] This embodiment adds a drive part housing 14, a balance part housing 15, and a number of first shock absorbers 14, second shock absorbers, third shock absorbers 17, and fourth shock absorbers to the original structure of the multi-functional swing saw to achieve the purpose of greatly reducing vibration and noise.

[0035] As Figure 2 , Figure 3 And Figure 11As shown in the figure, a multi-functional swing saw described in this embodiment includes: a machine housing 1, a swing shaft structure 2 with a band saw blade 21, a swing block structure, and a drive structure. A drive part housing 14 is fixedly installed in the inner cavity of the machine housing 1. The swing shaft structure 2 is vertically installed in the inner cavity of the drive part housing 14 through bearings, and the positions of the upper and lower saw blades 21 on the swing shaft structure 2 sequentially pass through the bottom through hole of the drive part housing 14 and the bottom through hole of the machine housing 1 and then extend out of the machine housing 1. The swing block structure is fixedly installed on the swing shaft structure 2 in the inner cavity of the drive part housing 14, and the drive structure for driving the swing block structure to swing reciprocally left and right is installed in the inner cavity of the drive part housing 14. At least one first shock absorber 16 is provided between the left side wall of the drive part housing 14 and the left inner cavity wall of the machine housing 1, and at least one second shock absorber is provided between the right side wall of the drive part housing 14 and the right inner cavity wall of the machine housing 1. The structure and position of each second shock absorber can refer to Figure 3 the structure and position of each first shock absorber 14 shown.

[0036] Generally, the machine housing 1 of the multi-functional swing saw is divided into two parts from front to back: a head housing 11 and a handle housing 12. As Figure 2 and Figure 3 shown, the drive part housing 14 is fixedly installed in the inner cavity of the head housing 11. The rear end of the drive part housing 14 extends backward to form a long strip-shaped balance part housing 15 with a hollow inner cavity. The balance part housing 15 is fixed in the inner cavity of the handle housing 12, and the inner cavity of the drive part housing 14 is communicated with the inner cavity of the balance part housing 15. The wiring of the multi-functional swing saw and the like can pass through the inner cavity of the balance part housing 15.

[0037] The slender structure of the balance part housing 15 enables the handle housing 12 to also be made into a slender structure form that is more suitable for hand holding, and the user's hand feeling is very good. In addition, there will inevitably be a large vibration during the operation of the drive structure, and the vibration can be greatly reduced and the noise can be reduced through the drive part housing 14 and the extended balance part housing 15.

[0038] At least one third shock absorber 17 is provided between the left side wall of the balance part housing 15 and the left inner cavity wall of the handle housing 12, and at least one fourth shock absorber is provided between the right side wall of the balance part housing 15 and the right inner cavity wall of the handle housing 12. The structure and position of each fourth shock absorber can refer to Figure 3 the structure and position of each third shock absorber 17 shown.

[0039] Among them, the first shock absorber 16, the second shock absorber, the third shock absorber 17, and the fourth shock absorber can all adopt the same shock absorber. There are various styles of shock absorbers. The shock absorber of this scheme preferably adopts a shock absorber spring. In order to reliably position the shock absorber spring, a positioning groove structure 18 can be respectively provided on the inner cavity wall of the driving part cover, the head shell, the balance part cover, and the inner cavity wall of the handle shell corresponding to the two ends of each shock absorber spring, so that the two ends of the shock absorber spring are respectively located in the corresponding positioning groove structure 18.

[0040] In this embodiment, the first shock absorber 16, the second shock absorber, the third shock absorber 17, and the fourth shock absorber can effectively reduce the vibration of the multifunctional swing saw. The drive housing 14 and the extended balance housing 15 are also provided to reduce vibration. Here, the first shock absorber 16, the second shock absorber, the third shock absorber 17, the fourth shock absorber and the balance housing 15 work together to greatly reduce the vibration of the multifunctional swing saw. The overall vibration of the multifunctional swing saw is very small, so the vibration felt by the operator when holding the handle housing 12 is significantly smaller than that of the traditional multifunctional swing saw. The gripping part of the hand does not feel numb as before. Even people with little gripping strength can hold it well without being disturbed by vibration. In addition, the reduction of vibration can also reduce noise, ensure the swing angle accuracy of the saw blade, and improve transmission efficiency and cutting efficiency.

[0041] Embodiment 2

[0042] The drive structure in the original multifunctional oscillating saw is shown in Figure 1 As shown, one end of the motor shaft 501 is supported in the motor 500, and the other end of the motor shaft 501 can only be suspended due to the position and action relationship between the spherical bearing 400 and the toggle slot 301. The action relationship between the spherical bearing 400 and the toggle slot 301 makes it easy for the suspended end of the motor shaft 501 to be deformed by force, which leads to problems such as a smaller reciprocating left and right swing angle of the saw blade 201, low transmission efficiency, low cutting efficiency, easy damage to the spherical bearing 400, large vibration, and high noise. In addition, the position and action relationship between the spherical bearing 400 and the toggle slot 301 means that the bearing on the motor shaft 501 can only be a spherical bearing 400 with a spherical outer ring profile, and it is impossible to use a low-cost ordinary bearing to replace it to reduce production costs; as shown in FIG. Figure 2 As shown, the outer ring profile 401 of the spherical surface of the spherical bearing 400 leaves a space for the toggle slot 301 to swing back and forth, thereby ensuring that the spherical bearing 400 can smoothly push the toggle slot 301 back and forth; however, the price of the spherical bearing 400 is much higher than that of ordinary bearings, which will undoubtedly increase the production cost. This embodiment is based on the first embodiment and improves the drive structure in the original multifunctional swing saw. First, it solves the problem of deformation of the motor shaft 501, and second, it solves the disadvantage of only using spherical bearings.

[0043] like Figure 4 As shown, in this embodiment, a support plate 4 is provided, and the support plate 4 is fixedly sealed at the open opening at the bottom of the driving part housing 14. The fixing method can be a fastening method such as bolts, or other methods can be used, which are not required here. A support hole 42 and a through hole 41 that penetrates from top to bottom are opened on the support plate 4, and the support plate 4 is hollowly sleeved on the swing shaft structure 2 through the through hole 41. At this time, there is a free gap between the through hole 41 and the swing shaft structure 2 for the swing shaft structure 2 to rotate around its own swing center line without touching the support plate 4, that is, the support plate 4 will not interfere with the movement of the swing shaft structure 2.

[0044] like Figure 4 , Figure 5 and Figure 6 As shown, the driving structure described in this embodiment is: a motor 5 is fixedly arranged in the inner cavity of the driving part cover 14 located behind the swing shaft structure 2, the motor 5 is placed vertically and the bottom end of the motor shaft 51 of the motor 5 is supported in the support hole 42 of the support plate 4 through a support bearing 53, a toggle bearing 52 is eccentrically arranged on the motor shaft 51, and a toggle groove 31 is provided at the rear of the swing block structure, and the toggle bearing 52 extends into the toggle groove 31 of the swing block structure.

[0045] When the motor 5 drives the toggle bearing 52 to rotate eccentrically relative to the axis of the motor shaft 51, the eccentrically rotating toggle bearing 52 pushes the toggle slot 31 back and forth, causing the swing block structure to swing back and forth relative to the swing center line of the swing shaft structure 2, thereby causing the swing shaft structure 2 fixedly connected to the swing block structure to swing back and forth with the saw blade 21.

[0046] One end of the motor shaft 51 is supported by the motor 5, and the other end of the motor shaft 51 is supported by the support bearing 53 installed in the support hole 42. Therefore, when the motor 5 drives the toggle bearing 52 to rotate eccentrically relative to the axis of the motor shaft 51, the motor shaft 51 is not easy to deform. This not only ensures that the final swing angle of the saw blade 21 will not become smaller and improves the transmission efficiency and cutting efficiency, but also better protects the toggle bearing 52 and increases the service life of the toggle bearing 52.

[0047] like Figure 4 and Figure 6 As shown, the swing block structure described in this embodiment includes: a horizontally placed swing plate 3, a mounting through hole 32 penetrating up and down is opened at the front of the swing plate 3, the swing plate 3 is fixedly mounted on the swing shaft structure 2 through the mounting through hole 32, and the toggle groove 31 is located at the rear section of the swing plate 3, and the toggle groove 31 penetrates the rear end surface of the swing plate 3. The toggle groove 31 is composed of a semi-cylindrical first through groove 311 and a rectangular second through groove 312 from front to back, and the first through groove 311 and the second through groove 312 are smoothly connected.

[0048] The positional relationship between the toggle bearing 52 and the toggle groove 31 is: the swing center line of the toggle groove 31 and the rotation center line of the toggle bearing 52 are parallel to each other, so there is always space between the left and right side surfaces of the toggle groove 31 and the outer ring contour of the toggle bearing 52 for the toggle groove 31 to swing back and forth during the movement. Therefore, the toggle bearing 52 here can use a low-priced ordinary bearing to reduce the cost of use.

[0049] Embodiment 3

[0050] The swing shaft structure in the original multifunctional swing saw is shown in Figure 1 As shown, the saw blade is fastened to the bottom of the swing shaft by a fastener, and the saw blade needs to be replaced with an auxiliary tool, which is not very convenient. This embodiment designs the swing shaft structure based on the first or second embodiment.

[0051] like Figure 4 , Figure 8 , Figure 11 As shown, the swing shaft structure 2 described in this embodiment is as follows: the swing shaft sleeve 22 is vertically installed in the inner cavity of the driving part housing 14 through a bearing, and the lower end of the swing shaft sleeve 22 passes through the bottom through hole of the driving part housing 14 and the bottom through hole of the head housing 11 in sequence and then extends out of the head housing 11. The swing shaft 23 is vertically movably inserted in the swing shaft sleeve 22, and the upper end of the swing shaft 23 extends upward from the upper end of the swing shaft sleeve 22 and then passes through the top through hole of the driving part housing 14 and extends into the inner cavity of the housing 1, and the lower end of the swing shaft 23 extends downward from the lower end of the swing shaft sleeve 22 and then is fixedly connected to the connecting block 25, and the insertion end of the saw blade 21 is inserted between the connecting block 25 and the swing shaft sleeve 22, and a pressing structure is provided between the swing shaft 23 and the swing shaft sleeve 22 to make the swing shaft 23 move upward relative to the swing shaft sleeve 22, thereby pressing and locking the insertion end of the saw blade 21 between the connecting block 25 and the swing shaft sleeve 22. The clamping structure described in this embodiment is as follows: the inner channel of the swing sleeve 22 is composed of an upper channel 221 and a lower channel 222 from top to bottom to form a stepped channel structure, and the aperture of the upper channel 221 is smaller than the aperture of the lower channel 222; an upper stopper 231 is fixedly provided on the swing shaft 23 located in the lower channel 222, and a lower stopper 223 is fixedly provided on the hole wall of the lower channel 222; a compression spring 24 is sleeved on the swing shaft 23 between the upper stopper 231 and the lower stopper 223; under the elastic force of the compression spring 24, the two ends of the compression spring 24 are respectively pressed against the upper stopper 231 and the lower stopper 223, so that the swing shaft 23 moves upward relative to the swing sleeve 22 until the insertion end of the saw blade 21 is pressed and locked between the connecting block 25 and the swing sleeve 22.

[0052] In order to make the pressing and locking of the saw blade 21 pressed and locked between the connecting block 25 and the swing shaft sleeve 22 more reliable, in this embodiment, an outwardly protruding shoulder 224 is provided at the lower end of the swing shaft sleeve 22. A plurality of vertically arranged connecting columns 225 are arranged around and evenly spaced on the bottom surface of the shoulder 224. Connecting through holes corresponding to the positions of the connecting columns 225 are provided at the insertion end of the saw blade 21. When the insertion end of the saw blade 21 is pressed and locked between the connecting block 25 and the swing shaft sleeve 22 under the pressing force of the pressing structure, the connecting columns 225 are located in the corresponding connecting through holes.

[0053] As Figure 7 , Figure 8 and Figure 10 shown, an unlocking structure for unlocking the pressing force of the connecting block 25 pressed and locked on the insertion end of the saw blade 21 is provided between the swing shaft 23 and the machine housing 1. The unlocking structure includes: a button 6. One end of the button is a pressing end 61, and the other end of the button 6 is a cam end 62 having a cam profile surface 63. The cam end 62 of the button 6 is hinged in the top through hole of the machine housing 1 above the swing shaft 23. When the button 6 is in the horizontal position, the unlocking structure is not unlocked, and the distances from the points on the profile curve of the cam profile surface 23 to the hinge point between the button 6 and the machine housing 1 gradually increase in the clockwise direction from the lowest point of the profile curve.

[0054] When the button 6 is in the horizontal position, a gap H2 is left between the upper end of the swing shaft 23 and the lowest end of the cam profile surface 63, and H2 is not zero to prevent wear caused by contact between the driven swing shaft 23 and the cam profile surface 63 when the swing shaft sleeve 22 reciprocates left and right under the drive of the drive structure. The maximum distance from the cam profile surface 63 to the hinge point between the button 6 and the machine housing 1 is H1, and the minimum distance from the cam profile surface 63 to the hinge point between the button 6 and the machine housing 1 is H3, and H1 > the sum of H2 and H3.

[0055] When the button 6 is in the horizontal position, the unlocking structure is in the unlocked state. As Figure 11 shown, at this time, the insertion end of the saw blade 21 is pressed and locked between the connecting block 25 and the swing shaft sleeve 22 under the pressing force of the pressing structure. When the button 6 swings counterclockwise around the hinge point between the button 6 and the machine housing 1 from the horizontal direction, the swing shaft 23 is pushed downward by the counterclockwise rotating cam profile surface 63 to overcome the pressing force of the pressing structure, so that the connecting block 25 moves downward away from the swing shaft sleeve 22. As Figure 10As shown, at this time, there is a gap 10 between the connecting block 25 and the swinging bushing 22 for the insertion end of the saw blade 21 to be pulled out. The insertion end of the saw blade 21 can be easily pulled out from between the connecting block 25 and the swinging bushing 22, and a new saw blade can be reinserted into this gap 10. Then, press the button 6 so that the button 6 swings clockwise around the hinge point between the button 6 and the housing 1 to the horizontal position. At this time, the insertion end of the replaced saw blade is again locked and pressed between the connecting block 25 and the swinging bushing 22 under the pressing force of the pressing structure.

[0056] As Figure 10 and Figure 11 shown, in this embodiment, the button 6 is composed of a button body 601 and a cam 602. There are two forward-extending hinge plates 603 provided on the button body 601, and the two hinge plates 603 are hinged to the housing 1 through a second hinge shaft 604. The outer contour of the cam 602 consists of a pressing surface 605 and a cam profile surface 63. The cam 602 is hinged to the second hinge shaft 604 between the two hinge plates 603, and the pressing surface 605 of the cam 602 abuts against the front end surface of the button body 601 between the two hinge plates 603. When the button body 601 swings around the second hinge shaft 604, the pressing surface 605 of the cam 602 is pushed by the front end surface of the button body 601, so that the cam 602 rotates synchronously and in the same direction as the button body 601. Setting the button 6 as a split type can, on the one hand, facilitate the processing of the button 6, and on the other hand, when the cam 602 is worn, there is no need to replace the entire button 6, and only the cam 602 needs to be replaced, reducing the use cost.

[0057] In order to keep the insertion end of the saw blade 21 in a state of being locked and pressed between the connecting block 25 and the swinging bushing 22 during the use of the saw blade 21, a locking structure for locking the position of the button 6 in the horizontal position is provided between the button 6 and the housing 1. As Figure 7 and Figure 9 shown, the locking structure in this embodiment is: a locking member 7 is provided on the housing 1 behind the cam end 62 of the button 6. The locking member 7 is integrally formed by a horizontal plate 71, side baffles 72 that are formed by smoothly bending upward and gradually inward from both ends of the horizontal plate 71, and curled edges 73 that are smoothly flipped outward from the tops of the two side baffles 72. The horizontal plate 71 is fixed to the housing 1, and a clamping groove 74 is formed between the two side baffles 72. A locking block 64 that protrudes downward and can be clamped in the clamping groove 74 is provided on the bottom surface of the button 6, and protruding strips 65 that protrude outward are respectively provided on the two side surfaces of the locking block 64.

[0058] The structure formed after the above-mentioned bending of the locking member 7 can endow the whole with micro-elasticity. During the process of the button 6 rotating clockwise to the horizontal position, the two ridges 65 on the locking block 64 move to the opening of the clamping groove 74. At this time, the width of the opening of the clamping groove 74 is smaller than the overall width at the position where the ridges 65 are located. Under the action of pressing down the locking block 64, the ridges 65 push the opening of the clamping groove 74 to open outward and then slide into the clamping groove 74. At this time, the opening of the clamping groove 74 returns to its original size. Therefore, the locking block 64 clamped in the clamping groove 74 will not come out of the clamping groove 74 without external force.

[0059] Embodiment 4

[0060] During the process of the button 6 swinging around the hinge point between the button 6 and the housing 1 to the horizontal position, the distance between the button 6 and the housing 1 becomes smaller and smaller. In order to prevent the hand from being clamped in the gap between the button 6 and the housing 1 during operation, in this embodiment, a hand clamping prevention structure is provided between the button 6 and the housing 1 on the basis of Embodiment 3.

[0061] As Figure 4 、 Figure 7 and Figure 8 shown, the hand clamping prevention structure described in this embodiment includes: a hand clamping prevention block 8. One end of the hand clamping prevention block 8 is a hinge end 81, and the other end of the hand clamping prevention block 8 is a abutting end 82. On the top surface of the hand clamping prevention block 8 between the hinge end 81 and the abutting end 82, there is a protruding placing block 83. The hinge end 81 of the hand clamping prevention block 8 is hinged to the housing 1 behind the cam end 62 of the button 6 through a first hinge shaft 80. On the housing 1 between the hinge end 81 of the hand clamping prevention block 8 and the cam end 62 of the button 6, there is a stop block 13. A torsion spring 84 is sleeved on the first hinge shaft 80. Under the elastic force of the torsion spring 84, the hand clamping prevention block 8 swings counterclockwise around the first hinge shaft 80 until the placing block 83 abuts against the stop block 13. At this time, after the button 6 swings clockwise around the hinge point between the button 6 and the housing 1 until the button 6 abuts against the abutting end 82 of the hand clamping prevention block 8, the button 6 is blocked by the abutting end 82 and cannot continue to swing clockwise. The position state of the button 6 at this time can be seen in Figure 8 shown. In this way, the phenomenon of pinching hands will not occur. If it is necessary to continue to make the button 6 swing clockwise to the horizontal position, only by pushing the hand clamping prevention block 8 to make the hand clamping prevention block 8 swing clockwise around the first hinge shaft 80 to the horizontal position against the elastic force of the torsion spring 84, pressing the button 6 to make the button 6 continue to swing clockwise to the horizontal position and then locking it in the horizontal position through the locking structure. The position state of the button 6 at this time can be seen in Figure 7 shown.

[0062] When the button 6 swings clockwise around the hinge point between the button 6 and the housing 1 until the button 6 abuts against the abutting end 82 of the anti-pinch block 8 and can no longer swing clockwise, it is necessary to push the anti-pinch block 8. To facilitate the pushing of the anti-pinch block 8, in this embodiment, a connecting shaft 85 is provided on at least one of the two side surfaces of the abutting end 82 of the anti-pinch block 8.

[0063] The above are only the preferred embodiments of the present invention, and do not limit the present invention in any other form. Any modification or equivalent change made according to the technical essence of the present invention still belongs to the scope of protection required by the present invention.

Claims

1. A multifunctional oscillating saw, include: The machine casing, the swing shaft structure of the band saw blade, the swing block structure and the driving structure are characterized in that: a driving part cover is fixedly installed in the inner cavity of the machine casing, the swing shaft structure is vertically installed in the inner cavity of the driving part cover through a bearing, and the saw blade at the bottom of the swing shaft structure is located so as to pass through the bottom through hole of the driving part cover and the bottom through hole of the machine casing in sequence and then extend out of the machine casing; the swing block structure is fixedly installed on the swing shaft structure in the inner cavity of the driving part cover, and the driving structure driving the swing block structure to swing back and forth is installed in the inner cavity of the driving part cover; at least one first shock absorber is arranged between the left side wall of the driving part cover and the left inner cavity wall of the machine casing, and at least one second shock absorber is arranged between the right side wall of the driving part cover and the right inner cavity wall of the machine casing; The support plate is sealed at the open opening at the bottom of the driving part housing, and a support hole and a through hole penetrating up and down are opened on the support plate, and the support plate is hollowly sleeved on the swing shaft structure through the through hole; the driving structure is as follows: a motor is fixedly arranged in the inner cavity of the driving part housing located behind the swing shaft structure, the motor is placed vertically and the bottom end of the motor shaft of the motor is supported in the support hole of the support plate through a support bearing, a toggle bearing is eccentrically arranged on the motor shaft, and a toggle groove is provided at the rear of the swing block structure, and the toggle bearing is located in the toggle groove; The swing block structure comprises: a swing plate placed horizontally, a mounting through hole penetrating up and down is opened at the front of the swing plate, the swing plate is fixedly mounted on the swing shaft structure through the mounting through hole, the toggle groove is located at the rear section of the swing plate, and the toggle groove penetrates the rear end surface of the swing plate; the toggle groove is composed of a semi-cylindrical first through groove and a rectangular second through groove from front to back, and the first through groove and the second through groove are smoothly connected; The swing shaft structure is as follows: the swing shaft sleeve is vertically installed in the inner cavity of the driving part cover shell through the bearing, and the lower end of the swing shaft sleeve passes through the bottom through hole of the driving part cover shell and the bottom through hole of the casing in sequence and then extends out of the casing; the swing shaft is vertically movably inserted in the swing shaft sleeve, and the upper end of the swing shaft extends upward from the upper end of the swing shaft sleeve and then passes through the top through hole of the driving part cover shell and extends into the inner cavity of the casing, and the lower end of the swing shaft extends downward from the lower end of the swing shaft sleeve and then is fixedly connected to the connecting block, and the insertion end of the saw blade is inserted between the connecting block and the swing shaft sleeve, and a pressing structure is provided between the swing shaft and the swing shaft sleeve to enable the swing shaft to move upward relative to the swing shaft sleeve, thereby pressing and locking the insertion end of the saw blade between the connecting block and the swing shaft sleeve; A pressing structure is provided between the swing shaft and the swing shaft sleeve. When the swing shaft moves upward relative to the swing shaft sleeve, the pressing structure presses and locks the insertion end of the saw blade between the connecting block and the swing shaft sleeve. An unlocking structure for unlocking the pressing force that locks the connecting block to the insertion end of the saw blade is provided between the swing shaft and the machine housing. The unlocking structure includes: a button, one end of the button is a pressing end, and the other end of the button is a cam end with a cam contour surface. The cam end of the button is hinged in the top through hole of the machine housing above the swing shaft. When the button is in the horizontal position, the unlocking structure is not unlocked, and the distances from the points on the contour curve of the cam contour surface to the hinge point between the button and the machine housing gradually increase in the clockwise direction from the lowest point of the contour curve. A locking structure for locking the position of the button in the horizontal position is provided between the button and the machine housing, and an anti-pinch structure is provided between the button and the machine housing.

2. A multifunctional swing saw according to claim 1, wherein: The machine housing is composed of a machine head housing and a handle housing. The driving part housing is fixedly installed in the machine head housing. The rear end of the driving part housing extends backward to form a long strip-shaped balance part housing with a hollow inner cavity. The balance part housing is fixed in the inner cavity of the handle housing, and the inner cavity of the driving part housing is communicated with the inner cavity of the balance part housing.

3. A multifunctional swing saw according to claim 2, wherein: At least one third shock absorber is provided between the left side wall of the balance part housing and the left inner cavity wall of the handle housing, and at least one fourth shock absorber is provided between the right side wall of the balance part housing and the right inner cavity wall of the handle housing.

4. A multifunctional swing saw according to claim 1, wherein: When the button is in the horizontal position, there is a gap H2 between the upper end of the swing shaft and the lowest end of the cam contour surface, and the maximum distance from the cam contour surface to the hinge point between the button and the machine housing is H1, and the minimum distance from the cam contour surface to the hinge point between the button and the machine housing is H3, and H1 > the sum of H2 and H3.

5. A multifunctional swing saw according to claim 1 or 4, wherein: The anti-pinch structure includes: an anti-pinch block, one end of the anti-pinch block is a hinge end, the other end of the anti-pinch block is a abutting end, and a protruding shelf block is provided on the top surface of the anti-pinch block between the hinge end and the abutting end; the hinge end of the anti-pinch block is hinged to the machine housing behind the cam end of the button through a first hinge shaft, a stop block is provided on the machine housing between the hinge end of the anti-pinch block and the cam end of the button, a torsion spring is sleeved on the first hinge shaft, and under the elastic force of the torsion spring, the anti-pinch block swings counterclockwise around the first hinge shaft until the shelf block abuts against the stop block; a connecting shaft is provided on at least one of the two side surfaces of the abutting end of the anti-pinch block.

6. A multifunctional swing saw according to claim 1, wherein: The locking structure is as follows: a locking member is provided on the housing behind the cam end of the button. The locking member is integrally formed by a horizontal plate, side baffles that are smoothly bent upward and gradually inward from both ends of the horizontal plate, and curled edges that are smoothly flipped outward from the tops of the two side baffles. The horizontal plate is fixed to the housing, and a clamping groove is formed between the two side baffles. A locking block that protrudes downward and can be clamped in the clamping groove is provided on the bottom surface of the button, and protruding strips that protrude outward are respectively provided on the two side surfaces of the locking block.

7. A multifunctional swing saw according to claim 1, characterized in that: The pressing structure is as follows: the inner channel of the swing shaft sleeve is a stepped channel structure composed of an upper channel and a lower channel from top to bottom. The aperture of the upper channel is smaller than that of the lower channel. An upper stop block is fixedly provided on the swing shaft located in the lower channel, and a lower stop block is fixedly provided on the inner wall of the lower channel. A compression spring is sleeved on the swing shaft between the upper stop block and the lower stop block. Under the elastic force of the compression spring, both ends of the compression spring respectively abut against the upper stop block and the lower stop block. An axially protruding shoulder is provided at the lower end of the swing shaft sleeve, and a plurality of vertically arranged connecting columns are circumferentially and evenly distributed on the bottom surface of the shoulder. Connecting through holes corresponding to the positions of the connecting columns are provided at the insertion end of the saw blade. When the insertion end of the saw blade is pressed and locked between the connecting block and the swing shaft sleeve under the pressing force of the pressing structure, each connecting column is located in the corresponding connecting through hole.

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