A quick-loading mechanism for an oscillating saw blade

Abstract

The present invention discloses a quick-install mechanism for a swing saw blade, comprising a machine head, an eccentric trigger is provided when the machine head rotates, a pressure block, a hollow output shaft, a pressure plate rod and a transmission component are provided in the machine head, the eccentric trigger drives the pressure block to move into the machine head, the pressure plate rod is provided in the output shaft, and the pressure plate rod is provided with a pressure plate; a locking block is hinged in the pressure block, and a meshing structure is provided between the locking block and the pressure plate rod, and the meshing structure includes a meshing groove and a meshing tooth, the meshing groove is provided in the locking block and / or the pressure plate rod, and the meshing tooth is correspondingly provided on the pressure plate rod and / or the locking block; the locking block is provided with a contact surface, and the contact surface is in contact with the output shaft; a first elastic member and a second elastic member are provided in the machine head. The present invention has the following advantages and effects: the scheme utilizes a new mechanical structure, has the effect of fast and convenient installation, and is relatively well installed, and a plurality of teeth meshed with the grooves are not easy to loosen; the two locking blocks are symmetrically arranged in a U shape, and have high safety, reliability and stability.

Description

Technical Field

[0001] The invention relates to the technical field of cutting tools, in particular to a quick-installation mechanism for an oscillating saw blade. Background Art

[0002] An oscillating saw is a tool that drives a saw blade to swing. The structure of an existing oscillating saw includes: a casing, a rotating shaft installed through a bearing is arranged at the front part of the casing, the lower end of the rotating shaft extends out of the casing, a saw blade is arranged on the lower end of the rotating shaft, a oscillating block is also arranged in the casing, one end of the oscillating block is fixed to the middle part of the rotating shaft, and a driving groove is arranged on the other end of the oscillating block, a motor is arranged at the rear part of the casing, a driving shaft installed through a bearing is arranged between the motor and the rotating shaft, the driving shaft is transmission-connected with the output shaft of the motor, an eccentric shaft is arranged on the output end of the driving shaft, and a bearing located in the driving groove is mounted on the eccentric shaft. When the motor drives the driving shaft to rotate and causes the eccentric shaft to rotate eccentrically, the bearing on the eccentric shaft can drive the oscillating block to swing by pushing the left and right sides of the driving groove, thereby causing the rotating shaft to swing with the saw blade.

[0003] Existing saw blades usually include a quick-loading blade 1' and a slow-loading blade 7'. The quick-loading blade 1' is Figure 1 As shown, it includes a connecting portion 2' and a cutting portion 3', the connecting portion 2' is provided with a central connecting hole 4' and a plurality of positioning holes 5', a notch 11' is formed on one side of the central connecting hole 4', and the cutting portion 3' is provided with a plurality of cutting teeth 6'; a slow-loading blade 7' is shown Figure 2 As shown, it comprises an annular connecting portion 2' and an arc-shaped cutting portion 3' arranged on the connecting portion 2'. A central connecting hole 4' is opened in the center of the connecting portion 2', and a plurality of positioning holes 5' are opened around the connecting portion 2'.

[0004] The existing Chinese patent with publication number CN106737446A discloses a handheld tool and a clamping device thereof, wherein the locking member includes an annular pressure plate at the bottom and a rod extending axially upward from the middle of the pressure plate, and the end of the rod is provided with an external thread. When installed, the rod passes through the cavity of the output shaft and is threadedly locked with the locking member. In this way, when installing a quick-install blade, the rod is relatively locked and loosened, so that the rod is axially away from the locking member by a certain distance, and the quick-install blade can be installed on the flat mounting portion of the output shaft through the notch. However, when installing a slow-install blade, the rod needs to be completely unscrewed and removed from the locking member along the thread before the slow-install blade can be installed. In this way, the twisting process requires a lot of effort, and there are problems such as inconvenient installation of the blade, inadequate installation, and easy loosening. Summary of the invention

[0005] The purpose of the invention is to provide a quick-installation mechanism for an oscillating saw blade, which has the effects of quick, convenient, and in-place installation of the blade without being easy to loosen.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a quick-loading mechanism for an oscillating saw blade, comprising a machine head, an eccentric trigger rotatably arranged on the machine head, a pressure block, a hollow output shaft, a pressure plate rod and a transmission component connected to the output shaft arranged in the machine head, the eccentric trigger drives the pressure block to move into the machine head, the pressure plate rod is arranged in the output shaft, a pressure plate is arranged at the front end of the pressure plate rod, and the pressure plate is matched with the end face of the output shaft;

[0007] At least one locking block is hinged in the pressing block, and a meshing structure is provided between the locking block and the pressing plate rod, the meshing structure includes a meshing groove and a meshing tooth, the meshing groove is provided on the locking block and / or the pressing plate rod, and the meshing tooth is correspondingly provided on the pressing plate rod and / or the locking block;

[0008] The locking block is provided with a contact surface, which contacts and cooperates with the output shaft. When the locking block is engaged with the pressure plate rod, the contact surface is inclined relative to the output shaft. When the pressure block drives the locking block to move axially toward the output shaft along the pressure plate rod, the output shaft contacts and cooperates with the contact surface, driving the meshing portion of the locking block away from the pressure plate rod.

[0009] A first elastic member and a second elastic member are arranged in the machine head. The first elastic member drives the pressing block to move outward from the machine head, and the second elastic member drives the locking block to always have a movement tendency to engage with the pressing plate rod.

[0010] By adopting the above technical scheme, in the initial state, the eccentric trigger is away from the pressure block, and the pressure block is relatively located at the upper end position of the machine head under the elastic force of the first elastic member. At this time, the locking block is engaged and locked with the pressure plate rod through the meshing structure under the elastic force of the second elastic member, and the pressure plate rod cannot move axially relative to the hollow output shaft; when the blade is installed, the eccentric trigger is pulled, and the eccentric thrust of the eccentric trigger makes the pressure block move to the inner position relative to the machine head. While the pressure block moves, the locking block is driven downward. When the contact surface of the locking block contacts the output shaft, the locking block rotates, and the meshing structure between the two is separated, that is, the pressure plate rod is unlocked, and after the pressure plate rod is axially removed from the output shaft, the slow-loading blade is sleeved on the pressure plate rod; then the pressure plate rod is reinserted into the output shaft, and the eccentric trigger is reset. Under the elastic force of the first elastic member and the second elastic member, the pressure block and the locking block are reset respectively, and the locking block is re-engaged with the side wall of the pressure plate rod to achieve re-locking. In addition, when the eccentric trigger is in the reset state, the pressure plate rod can also be directly inserted. During the insertion process, the side wall of the pressure plate rod causes the meshing part of the locking block to expand outward, which produces a certain compression on the second elastic member. In this way, the pressure plate rod is directly inserted and locked to install the blade, which saves time and effort and has the effect of quick and convenient installation. The installation is relatively in place, and several teeth and grooves are engaged and are not easy to loosen.

[0011] The present invention is further configured as follows: one end of the locking block is configured as a locking end, the locking end is configured as an extension portion close to the pressure plate rod, the meshing teeth are correspondingly configured at the extension portion, and when the pressure block drives the locking block to rotate, the extension portion moves along an arc trajectory away from the pressure plate rod.

[0012] The present invention is further configured such that an axial displacement gap is formed between the abutment surface and the output shaft.

[0013] By adopting the above technical scheme, the displacement gap is set so that when the eccentric trigger presses the pressure block down a distance less than or equal to the displacement gap, it drives the locking block and the pressure plate rod to be pressed down relative to the output shaft at the same time. In this process, since the resistance surface does not form a resistance effect with the output shaft, the locking block will not rotate relatively and move away from the pressure plate rod. At this time, since a gap is formed between the pressure plate at the front end of the pressure plate rod and the end face of the output shaft, there is no need to completely remove the pressure plate rod. The notch of the quick-mounted blade can be inserted between the pressure plate and the end face of the output shaft. When the pressure block drives the pressure plate rod to reset, the quick-mounted blade can be pressed and fixed between the pressure plate and the end face of the output shaft to realize the quick installation process.

[0014] The present invention is further configured as follows: a shift fork is arranged in the machine head, the shift fork is sleeved outside the output shaft, and the shift fork is connected to the transmission component.

[0015] By adopting the above technical solution, the transmission component is externally connected to the motor, and the output shaft can be driven to rotate through the shift fork.

[0016] The present invention is further configured as follows: the first elastic member is configured as a return spring, one end of the return spring abuts against the shift fork, and the other end of the return spring abuts against the pressure block.

[0017] By adopting the above technical solution, when the pressure block is acted upon by the eccentric thrust of the eccentric trigger and moves into the machine head, pressure is generated on the reset spring, causing the reset spring to accumulate force. When the eccentric trigger removes the force on the pressure block, it automatically resets under the elastic force of the reset spring.

[0018] The present invention is further configured as follows: a retaining ring is embedded in the inner wall of the machine head, and a return spring drives the pressing block to always have a movement tendency against the retaining ring.

[0019] By adopting the above technical solution, the setting of the retaining ring can limit the displacement stroke of the pressure block during resetting, preventing the pressure block from being completely separated from the machine head due to the elastic force of the reset spring, and has a good limiting and anti-separation effect.

[0020] The present invention is further configured as follows: the second elastic member is configured as a telescopic spring, one end of the telescopic spring abuts against the shift fork, the other end of the telescopic spring abuts against the locking block, and the locking block is provided with a limiting step that cooperates with the telescopic spring.

[0021] By adopting the above technical solution, the limiting step can limit the telescopic spring to prevent the locking block from being separated from the telescopic spring when rotating.

[0022] The present invention is further configured as follows: two symmetrical locking blocks are hinged on the pressing block, the locking blocks are hinged on the pressing block through a hinge shaft, one end of the locking block is engaged with the side wall of the pressure plate rod, and the other end of the locking block is abutted against the second elastic member; the two locking blocks cooperate to form a U-shape, and the opening direction of the U-shape is the same as the direction in which the pressure plate rod is pulled away from the output shaft.

[0023] By adopting the above technical scheme, the two locking blocks are symmetrically arranged, so that the force during engagement acts symmetrically on the pressure plate rod, and the locking blocks on both sides can play a better clamping and locking role on the side walls of the pressure plate rod. Since the two locking blocks form a U-shape when locked, if in the locked state, an axial pulling force is applied to the pressure plate rod, under the meshing action of the meshing structure, the meshing part of the locking block moves toward the direction close to the pressure plate rod, so that the clamping force of the locking block to clamp the pressure plate rod can be made greater, and the pressure plate rod cannot move axially and disengage, which has higher safety, reliability and stability.

[0024] The present invention is further configured as follows: the meshing teeth are configured as ratchet teeth or triangular teeth, and the opening directions of the meshing teeth and the meshing grooves are adapted to the arc path formed when the locking block rotates.

[0025] The present invention is further configured as follows: a plurality of positioning columns are arranged on the end surface of the output shaft along the circumferential direction.

[0026] By adopting the above technical solution, when the blade is mounted on the end face of the output shaft, the positioning column is correspondingly inserted into the positioning hole of the blade to achieve pre-positioning.

[0027] In summary, the present invention has the following beneficial effects:

[0028] 1. The locking block is hinged on the pressure block, and the locking block is meshed with the side wall of the pressure plate rod through the meshing structure. When the blade is installed, the pressure block moves to drive the locking block to move. When the contact surface of the locking block contacts the output shaft, the locking block rotates, so that the meshing structure between the two is separated, that is, the pressure plate rod is unlocked. After the pressure plate rod is taken out axially from the output shaft, the slow-installed blade is sleeved on the pressure plate rod; the pressure plate rod is reinserted into the output shaft, and the locking block is re-engaged with the side wall of the pressure plate rod to achieve re-locking. In this way, time and labor are saved, and the installation is fast and convenient. Moreover, the installation is relatively in place, and several teeth and grooves are meshed and are not easy to loosen.

[0029] 2. By setting a displacement gap between the contact surface of the locking block and the output shaft, it is only necessary to press the pressing block down by a distance less than or equal to the displacement gap, so that a gap for the quick-install blade to be inserted can be formed between the pressing plate at the front end of the pressing plate rod and the end face of the output shaft. It is not necessary to completely remove the pressing plate rod, and the notch of the quick-install blade can be inserted between the pressing plate and the end face of the output shaft. In this process, the locking block always locks the pressing plate rod to a limit position, and the pressing plate is not easy to detach from the machine head at will;

[0030] 3. Two locking blocks are used to form a U-shape. The opening direction of the U-shape is the same as the direction in which the pressure plate rod is pulled away from the output shaft. When the pressure plate rod is subjected to an axially pulled outward force, the meshing action of the meshing structure causes the meshing part of the locking block to move toward the pressure plate rod, thereby making the clamping force of the locking block clamping the pressure plate rod greater, and the pressure plate rod cannot move axially and disengage, which has higher safety, reliability and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The diagram is a schematic diagram of the structural relationship of the quick-install blade in the prior art.

[0032] Figure 2 It is a schematic diagram of the structural relationship of the slow-loading blade in the prior art.

[0033] Figure 3 It is a schematic diagram of the overall structural relationship of the embodiment.

[0034] Figure 4 is a top view of the embodiment.

[0035] Figure 5 yes Figure 4 Cross-sectional view of section AA.

[0036] Figure 6 It is a cross-sectional view of the internal structure of the embodiment from another perspective, in which the locking block is in an unlocked state.

[0037] Figure 7 is a side view of the embodiment.

[0038] Figure 8 yes Figure 7 The cross-sectional view of the middle BB section. The locking block is in the locked position.

[0039] Fig. 9 It is a schematic diagram of the structural relationship of the eccentric trigger of the embodiment in the middle position state.

[0040] In the figure: 1', quick-loading blade; 11', notch; 2', connecting part; 3', cutting part; 4', central connecting hole; 5', positioning hole; 6', cutting teeth; 7', slow-loading blade; 1, machine head; 11, bearing; 12, retaining ring; 2, eccentric trigger; 3, pressure block; 31, protrusion; 32, mounting groove; 33, hinge shaft; 4, output shaft; 41, positioning column; 5, pressure plate rod; 51, pressure plate; 52, meshing groove; 6, shift fork; 61, transmission part; 62, annular groove; 7, locking block; 71, extension part; 711, meshing teeth; 72, contact surface; 73, limit step; 8, reset spring; 9, telescopic spring. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings. Figure 5 The directions shown are consistent.

[0042] A quick-loading mechanism for an oscillating saw blade, such as Figure 3 As shown, the machine head 1 includes an eccentric trigger 2 which is rotatably arranged on the machine head 1. The eccentric trigger 2 can be positioned at three different positions, namely, left, middle and right, relative to the machine head 1.

[0043] like Figure 4 and Figure 5 As shown, a pressure block 3, a hollow output shaft 4, a pressure plate rod 5 and a transmission component 61 connected to the output shaft 4 are arranged in the machine head 1. The pressure block 3 is movably arranged in the machine head 1. A protrusion 31 is arranged at one end of the pressure block 3 corresponding to the outer side of the machine head 1. The protrusion 31 cooperates with the eccentric trigger 2. When the eccentric trigger 2 contacts the protrusion 31, the pressure block 3 can be driven to move into the machine head 1. The hollow output shaft 4 is rotatably arranged in the machine head 1 through two bearings 11. The pressure plate rod 5 is coaxially installed in the output shaft 4, and the pressure plate rod 5 can be displaced axially along the output shaft 4. A shift fork 6 is arranged in the machine head 1. The shift fork 6 is sleeved outside the output shaft 4, and the shift fork 6 is connected to the transmission component 61. The transmission component 61 is externally connected to a motor, and the output shaft 4 can be driven to rotate through the shift fork 6. A pressing plate 51 is disposed at the lower end of the pressing plate rod 5 . The pressing plate 51 is abutted against the end surface of the output shaft 4 . A plurality of positioning columns 41 are disposed on the end surface of the output shaft 4 along the circumferential direction.

[0044] like Figure 5-8 As shown, the pressure block 3 has two installation grooves 32, and two locking blocks 7 are hinged in the installation grooves 32 through hinge shafts 33. The two locking blocks 7 are symmetrically arranged, and the two locking blocks 7 cooperate to form a U shape. The opening direction of the U shape is the same as the direction in which the pressure plate rod 5 is pulled away from the output shaft 4.

[0045] like Figure 5-8As shown, a meshing structure is provided between the locking block 7 and the pressure plate rod 5, the meshing structure includes a meshing groove 52 and a meshing tooth 711, the upper end of the locking block 7 is provided as a locking end, the locking end is provided as an extension 71 close to the pressure plate rod 5, the extension 71 is provided with a meshing tooth 711, the upper side wall of the pressure plate rod 5 is provided with a meshing groove 52, and the locking block 7 and the pressure plate rod 5 are locked and positioned by the meshing structure. In other embodiments, the meshing groove 52 can be provided on the locking block 7, and the meshing tooth 711 can be provided on the pressure plate 51 rod 5. A contact surface 72 is provided on the side wall of the locking block 7 close to the pressure plate rod 5, and the contact surface 72 is in contact with the upper end of the output shaft 4. When the locking block 7 is engaged with the side wall of the pressure plate rod 5, the contact surface 72 is inclined relative to the output shaft 4. When the pressure block 3 drives the locking block 7 to move axially along the pressure plate rod 5 toward the output shaft 4, the output shaft 4 is in contact with the contact surface 72, driving the locking end of the locking block 7 away from the pressure plate rod 5; an axial displacement gap is formed between the lowest point of the contact surface 72 and the output shaft 4.

[0046] like Figure 5-8 As shown, the machine head 1 is provided with a first elastic member and a second elastic member. The first elastic member drives the pressure block 3 to move upward to the machine head 1, and the second elastic member drives the locking block 7 to always have a movement tendency to engage with the pressure plate rod 5. The first elastic member is set as a reset spring 8, the lower end of the reset spring 8 abuts against the upper end surface of the fork 6, and the upper end of the reset spring 8 abuts against the lower end surface of the pressure block 3. When the pressure block 3 is acted upon by the eccentric thrust of the eccentric trigger 2 and moves into the machine head 1, pressure is generated on the reset spring 8, so that the reset spring 8 accumulates force. When the eccentric trigger 2 removes the force on the pressure block 3, it automatically resets under the elastic force of the reset spring 8. A retaining ring 12 is embedded in the upper inner wall of the machine head 1, and the reset spring 8 drives the pressure block 3 to always have a movement tendency to abut against the retaining ring 12. The setting of the retaining ring 12 can limit the displacement stroke of the pressure block 3 when it is reset, and prevent the pressure block 3 from being separated from the machine head 1 as a whole due to the elastic force of the reset spring 8, which has a good limiting and anti-separation effect. The second elastic member is set as a telescopic spring 9, and the upper end surface of the fork 6 is provided with an annular groove 62. The lower end of the telescopic spring 9 is embedded in the annular groove 62 of the fork 6. The upper end of the telescopic spring 9 is against the locking block 7, and the locking block 7 is provided with a limiting step 73 that cooperates with the telescopic spring 9. The limiting step 73 can limit the telescopic spring 9 to prevent the locking block 7 from being separated from the telescopic spring 9 when rotating. One end of the locking block 7 is engaged with the side wall of the pressure plate rod 5, and the other end of the locking block 7 is against the telescopic spring 9.

[0047] The basic working principle of the present invention is: in the initial state, the eccentric trigger 2 is away from the pressure block 3 (such as Figure 7As shown in the figure, the pressure block 3 is located at the upper side of the machine head 1 under the action of the resetting elastic force. At this time, the locking block 7 is engaged and locked with the pressure plate rod 5 through the engaging structure under the elastic force of the telescopic spring 9, and the pressure plate rod 5 cannot move axially relative to the hollow output shaft 4.

[0048] When installing the quick-release blade 1', pull the eccentric trigger 2 from the left side to the middle (such as Fig. 9 ), under the eccentric thrust of the eccentric trigger 2, the pressure block 3 moves a certain distance inward relative to the machine head 1, and the pressure block 3 moves while driving the locking block 7 downward. When the pressure block 3 is pressed down by a distance less than or equal to the displacement gap, the locking block 7 and the pressure plate rod 5 are simultaneously driven to press down relative to the output shaft 4. In this process, since the abutment surface 72 does not form an abutment with the output shaft 4, the locking block 7 will not rotate relative to the pressure plate rod 5 and move away from the pressure plate rod 5. At this time, since there is a gap between the pressure plate 51 at the front end of the pressure plate rod 5 and the end face of the output shaft 4, it is not necessary to completely remove the pressure plate rod 5, and the notch 11' of the quick-install blade 1' can be inserted between the pressure plate 51 and the end face of the output shaft 4, and the positioning column 41 can be inserted into the positioning hole 5' of the blade accordingly to play a role in pre-positioning. Then the eccentric trigger 2 is reset to the left side, and under the elastic force of the reset spring 8, the pressure block 3 moves upward and resets and drives the pressure plate rod 5 to reset, so that the quick-install blade 1' can be pressed and fixed between the pressure plate 51 and the end face of the output shaft 4 to achieve a quick installation process.

[0049] When the slow-loading blade 7' is installed, the eccentric trigger 2 is pulled from the left to the right, and the eccentric thrust of the eccentric trigger 2 makes the pressure block 3 move a large distance downward relative to the machine head 1, and when the contact surface 72 of the locking block 7 contacts the output shaft 4, the locking block 7 rotates until the contact surface 72 is parallel to the outer wall of the output shaft 4, and the extension portion 71 moves away from the pressure plate rod 5 along the arc trajectory, so that the meshing structure between the two is separated, that is, the pressure plate rod 5 is unlocked, and after the pressure plate rod 5 is axially removed from the output shaft 4, the slow-loading blade 7' is put on the pressure plate rod 5; then the pressure plate rod 5 is reinserted into the output shaft 4, the eccentric trigger 2 is reset, and under the elastic force of the reset spring 8 and the telescopic spring 9, the pressure block 3 and the locking block 7 are reset respectively, and the locking block 7 is re-engaged with the side wall of the pressure plate 51 rod 5 to achieve re-locking.

[0050] In addition, when the eccentric trigger 2 is in the reset state before the pressure plate rod 5 is inserted, the pressure plate rod 5 can also be directly inserted. During the insertion process, the side wall of the pressure plate rod 5 causes the meshing part of the locking block 7 to expand outward, which produces a certain compression on the telescopic spring 9. In this way, the pressure plate rod 5 is directly inserted and locked to install the blade, which saves time and effort, has the effect of quick and convenient installation, and is installed in place, and a number of teeth and grooves are engaged and are not easy to loosen.

[0051] The two locking blocks 7 are symmetrically arranged so that the forces acting during engagement are symmetrical, and the locking blocks 7 on both sides can play a better clamping and locking role on the side walls of the pressure plate rod 5. Since the two locking blocks 7 form a U-shape when locked, if a pulling force is applied axially outward to the pressure plate rod 5 in the locked state, the meshing part of the locking block 7 moves toward the direction close to the pressure plate rod 5 under the meshing action of the meshing structure, thereby making the clamping force of the locking block 7 to clamp the pressure plate rod 5 greater, and the pressure plate rod 5 cannot move axially and disengage, which has higher safety, reliability and stability.

[0052] It should be noted that, in this embodiment, the meshing teeth 711 are configured as ratchet teeth. In other embodiments, the meshing teeth 711 can also be configured as triangular teeth or grooves. The opening directions of the meshing teeth 711 and the meshing grooves 52 are adapted to the arc path formed when the locking block 7 rotates.

[0053] Since the use of the saw in this embodiment is the same as that in the prior art, it will not be described in detail here.

[0054] The above description is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A quick-loading mechanism for an oscillating saw blade, comprising a machine head (1), an eccentric trigger (2) rotatably arranged on the machine head (1), a pressure block (3), a hollow output shaft (4), a pressure plate rod (5) and a transmission component (61) connected to the output shaft (4) arranged in the machine head (1), the eccentric trigger (2) drives the pressure block (3) to move into the machine head (1), the pressure plate rod (5) is arranged in the output shaft (4), a pressure plate (51) is arranged at the front end of the pressure plate rod (5), and the pressure plate (51) is abutted against the end surface of the output shaft (4); characterized in that: At least one locking block (7) is hinged inside the pressing block (3); a meshing structure is provided between the locking block (7) and the pressing plate rod (5); the meshing structure comprises a meshing groove (52) and a meshing tooth (711); the meshing groove (52) is provided on the locking block (7) and / or the pressing plate rod (5); and the meshing tooth (711) is correspondingly provided on the pressing plate rod (5) and / or the locking block (7); The locking block (7) is provided with a contact surface (72), and the contact surface (72) is in contact with the output shaft (4). When the locking block (7) is engaged with the pressure plate rod (5), the contact surface (72) is inclined relative to the output shaft (4). When the pressure block (3) drives the locking block (7) to move axially toward the output shaft (4) along the pressure plate rod (5), the output shaft (4) is in contact with the contact surface (72), driving the meshing portion of the locking block (7) away from the pressure plate rod (5); The machine head (1) is provided with a first elastic member and a second elastic member, wherein the first elastic member drives the pressing block (3) to move outward from the machine head (1), and the second elastic member drives the locking block (7) to always have a movement tendency to engage with the pressing plate rod (5).

2. The quick-install mechanism for an oscillating saw blade according to claim 1, characterized in that: One end of the locking block (7) is configured as a locking end, and the locking end is configured as an extension portion (71) close to the pressure plate rod (5). The meshing teeth (711) are correspondingly configured on the extension portion (71). When the pressure block (3) drives the locking block (7) to rotate, the extension portion (71) moves along an arc-shaped trajectory away from the pressure plate rod (5).

3. The quick-install mechanism of the oscillating saw blade according to claim 1, characterized in that: An axial displacement gap is formed between the abutment surface (72) and the output shaft (4).

4. The quick-install mechanism for an oscillating saw blade according to claim 1, characterized in that: A shift fork (6) is arranged inside the machine head (1), the shift fork (6) is sleeved outside the output shaft (4), and the shift fork (6) is connected to the transmission component (61).

5. The quick-install mechanism for an oscillating saw blade according to claim 4, characterized in that: The first elastic member is configured as a return spring (8), one end of the return spring (8) abuts against the shift fork (6), and the other end of the return spring (8) abuts against the pressure block (3).

6. The quick-install mechanism for an oscillating saw blade according to claim 5, characterized in that: A retaining ring (12) is embedded in the inner wall of the machine head (1), and the return spring (8) drives the pressure block (3) to always have a movement tendency against the retaining ring (12).

7. The quick-install mechanism for an oscillating saw blade according to claim 4, characterized in that: The second elastic member is configured as a telescopic spring (9), one end of the telescopic spring (9) abuts against the shift fork (6), the other end of the telescopic spring (9) abuts against the locking block (7), and the locking block (7) is provided with a limiting step (73) that cooperates with the telescopic spring (9) to limit the position.

8. The quick-install mechanism for an oscillating saw blade according to claim 1, characterized in that: Two symmetrical locking blocks (7) are hinged on the pressing block (3), and the locking blocks (7) are hinged on the pressing block (3) through a hinge shaft (33). One end of the locking block (7) is engaged with the side wall of the pressing plate rod (5), and the other end of the locking block (7) is abutted against the second elastic member. The two locking blocks (7) cooperate to form a U shape, and the opening direction of the U shape is the same as the direction in which the pressing plate rod (5) is pulled away from the output shaft (4).

9. The quick-install mechanism for an oscillating saw blade according to claim 1, characterized in that: The meshing teeth (711) are configured as ratchet teeth or triangular teeth, and the opening directions of the meshing teeth (711) and the meshing grooves (52) are adapted to the arc path formed when the locking block (7) rotates.

10. The quick-install mechanism for an oscillating saw blade according to claim 1, characterized in that: The end surface of the output shaft (4) is provided with a plurality of positioning columns (41) along the circumferential direction.

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