Door assembly and cutting machine

Abstract

The utility model provides a door assembly and cutting machine, door assembly includes frame, first door, second door, lock tongue, linkage and damping mechanism, first door and frame rotation connection in first axle, second door and frame rotation connection in second axle, lock in locking position's lock tongue with second door locking, first door rotates to first open position in the process from first closed position and forces linkage to drive lock tongue to move to the unlocking position, one damping mechanism corresponds to second door setting, when lock tongue is in unlocking position, under the action of dead weight or external force, second door rotates to second open position and the damping mechanism provides resistance for the rotation of second door in the process, and / or, another damping mechanism corresponds to first door setting, under the action of external force, the damping mechanism provides resistance for the rotation of first door in the process that first door rotates to first open position from first closed position. The cutting machine includes the above door assembly. The utility model solves the problem of cutting machine door impact.

Description

Technical Field

[0001] This utility model relates to the field of cutting machine technology, specifically to a double-door cutting machine and its door assembly. Background Technology

[0002] There are existing automated machines that cut cards to form text or patterns on them.

[0003] This cutting machine includes a flip-open dust cover and a flip-open tray. When closed, the dust cover and tray form the upper and front panels of the cutting machine frame, respectively. Both the upper and front panels have torsion springs on their pivots. The restoring force of the torsion springs forces the upper and front panels to rotate to the open position. The cutting machine also includes latches that hold the upper and front panels in place. Pressing a button on the frame surface unlocks the latches. After unlocking, the upper and front panels spring open and finally reach their respective open positions, putting the cutting machine into operation.

[0004] The existing cutting machine has the following problem: after the user manually presses the button to unlock, the two door panels pop open quickly; and since the user holds the machine body with one hand and presses the button with the other, it is difficult for the user to immediately free their hand to support the door panels, which cannot prevent the door panels from popping open quickly and is prone to impact damage. Utility Model Content

[0005] The primary objective of this invention is to provide a door assembly that can avoid the problem of impact when opening the door panel.

[0006] The second objective of this invention is to provide a cutting machine that can avoid the problem of impact when opening the door panel.

[0007] The first objective of this utility model is to provide a door assembly comprising a frame, a first door, a second door, and a latch. The first door is rotatably connected to the frame via a first axis, and the second door is rotatably connected to the frame via a second axis. The latch is mounted on the frame and is movable between a locked position and an unlocked position. The latch in the locked position locks the second door in a second closed position. The door assembly also includes a linkage mechanism and a damping mechanism. The linkage mechanism is located between the first door and the latch. During the rotation of the first door from the first closed position to the first open position, the linkage mechanism forces the latch to move towards the unlocked position. A damping mechanism is provided corresponding to the second door. When the latch is in the unlocked position, the second door rotates to the second open position under its own weight or external force, and the damping mechanism provides resistance to the rotation of the second door during this process. And / or, another damping mechanism is provided corresponding to the first door. During the rotation of the first door from the first closed position to the first open position under the action of external force, the damping mechanism provides resistance to the rotation of the first door.

[0008] As can be seen from the above scheme, under this setting, the user no longer needs to press a button to unlock the door panel. Instead, while the first door is opened, the second door automatically unlocks and opens under its own weight or spring force. Furthermore, during the opening process, the second door is in an openable state. Under the action of the damping mechanism, the second door will open slowly without colliding with the machine itself or the ground. The first door can continue to be manually opened by the user, or it can open automatically under the action of spring force after the user releases their hand. Under the action of another damping mechanism, the opening action of the first door is also relatively slow, preventing collision with the machine itself or the ground. Even if only one door has a corresponding damping mechanism, since this utility model eliminates the need for manual button pressing, the user can use both hands to support both doors in advance to avoid collisions caused by either door opening too quickly. For example, when the user opens the machine, they will inevitably hold the first door. Even if the second door panel does not have a damping mechanism, the user can use their other hand to support it before the second door opens, thus preventing a collision.

[0009] A further embodiment is that the damping mechanism includes a damping elastic element and a rotating element; when the rotating element rotates, the elastic force of the damping elastic element provides a frictional force that hinders the rotation of the rotating element, or the torsional restoring force of the damping elastic element hinders the rotation of the rotating element; in the damping mechanism corresponding to the first door, the rotating element is drivenly connected to the first door; in the damping mechanism corresponding to the second door, the rotating element is drivenly connected to the second door.

[0010] As can be seen from the above, the advantage of using the elastic force of damping elastic elements to provide friction or torsional restoring force is that, like springs, even if the installation space is limited to a certain size, one of many different types of springs can be selected to achieve the most ideal door opening effect, resulting in low cost and good performance. Furthermore, theoretically, the damping elastic element can directly abut against the side of the first or second door, achieving the same damping effect with fewer parts. However, this arrangement exposes the damping elastic element to external forces, making it more susceptible to damage, and also increases the assembly difficulty of the first / second door. Therefore, this invention specifically adds a rotating component that connects the first / second door. The damping elastic element cooperates with the rotating component, solving the problems of exposed damping elastic elements and difficult installation of the first / second door.

[0011] A further embodiment is that the damping mechanism also includes a positioning element, which is fixedly connected to the frame. The positioning element has a first positioning groove, and the damping elastic element includes a first positioning arm, which is disposed in the first positioning groove to restrict the damping elastic element from rotating around the axis of the rotating element. The damping elastic element abuts against the rotating element along the axial direction of the rotating element, and the two are in frictional engagement. Alternatively, the rotating element has a second positioning groove, and the damping elastic element includes a second positioning arm, which is disposed in the second positioning groove. When the rotating element rotates, the damping elastic element is driven to twist.

[0012] As can be seen from the above, this setting prevents the damping elastic element from rotating, ensuring that friction is generated between the damping elastic element and the rotating element to provide resistance. Alternatively, this setting allows the damping elastic element to be twisted when the door rotates.

[0013] A further embodiment includes a cover block in the damping mechanism, which is connected to the frame and forms a damping mounting cavity between them; the rotating component, the damping elastic component, and the positioning component are all located in the damping mounting cavity, and the cover block, the positioning component, the damping elastic component, and the rotating component abut against each other in sequence.

[0014] As can be seen from the above, this configuration simplifies the structure, reduces assembly difficulty, and improves production efficiency. Furthermore, this configuration facilitates the maintenance and replacement of the damping mechanism, allowing users to easily remove the cover and replace any component within the damping mounting cavity. Additionally, in the configuration where the damping effect is generated through the torsional restoring force of the damping elastic element, an auxiliary damping effect can also be achieved using the friction between the outer circumferential surface of the damping elastic element and the inner circumferential surface of the surrounding structure.

[0015] A further embodiment includes a door assembly that also includes a transmission component rotatably connected to the frame. The transmission component includes a first gear portion and a first door connecting portion. In the damping mechanism corresponding to the first door, the rotating component includes a second gear portion. The first door connecting portion is connected to the first door, and the first gear portion meshes with the second gear portion. And / or, the frame is provided with a connecting hole. In the damping mechanism corresponding to the second door, the rotating component is provided with a second door connecting portion. The second door connecting portion passes through the connecting hole and connects to the second door.

[0016] As can be seen from the above, since the first door needs to drive the linkage mechanism, a transmission component is set up for ease of assembly. The transmission component is geared to the rotating component and also to the crank gear of the linkage mechanism. This configuration results in a compact structure with fewer parts and easy assembly. The second door, which does not require other transmission, is directly connected to the rotating component of its corresponding damping mechanism, minimizing the number of parts, further simplifying the structure, facilitating assembly, and reducing costs.

[0017] Another further option is to place the damping installation cavity containing the damping mechanism corresponding to the first door in the cover, with the frame blocking the installation entrance of the damping installation cavity; or, to place the damping installation cavity containing the damping mechanism corresponding to the second door on the frame, with the cover blocking the installation entrance of the damping installation cavity.

[0018] As can be seen from the above, since the rotating component of the damping mechanism corresponding to the first door needs to mesh with the gear teeth of the transmission component, if the damping mounting cavity is formed on the frame, it would make the installation of the rotating component and the transmission component difficult or restrict the design. However, placing the damping mounting cavity in the cover and the frame allows for sufficient clearance between the cover and the frame for the rotating component and the gear teeth of the transmission component to mesh, making this assembly method more reasonable. In addition, for the damping mechanism corresponding to the second door, since the rotating component directly passes through the connecting hole and connects to the second door, the damping mounting cavity is placed on the frame. The peripheral wall of the damping mounting cavity effectively and stably restricts the rotating component from the outer periphery, ensuring that the rotating component rotates smoothly along its axis of rotation.

[0019] Another further solution is to use a cover to restrict the rotation of the positioning component.

[0020] As can be seen from the above, if the positioning component rotates, it will also affect the damping effect of the damping elastic component on the rotating component. Therefore, this utility model restricts the rotation of the positioning component by using a cover.

[0021] A further embodiment is that the second positioning arm is set in the second positioning groove, and the positioning member is provided with a first anti-rotation part, and the cover member is provided with a second anti-rotation part, with the first anti-rotation part cooperating with the second anti-rotation part; one of the first anti-rotation part and the second anti-rotation part is a spline, and the other of the first anti-rotation part and the second anti-rotation part is a spline hole.

[0022] As can be seen from the above, with the damping effect generated by the torsional restoring force of the damping elastic element, since the spline and spline hole can be fitted at multiple angles, after assembly, pressing the positioning element with a screwdriver can disengage the spline of the positioning element from the spline hole and cause the damping elastic element to deform under pressure. At this time, the positioning element can be twisted to change the orientation of the first positioning groove, and then the pressure can be released to return the positioning element to its installation position. This can change the degree of torsion of the damping elastic element and change the initial torsional restoring force. Users can adjust the damping degree according to their own needs.

[0023] Another further embodiment is that the linkage mechanism includes a crank, a connecting rod, and a cam; the crank is rotatably connected to the frame and is driven to rotate by the first door; the cam is rotatably connected to the frame, and the connecting rod is rotatably connected between the crank and the cam; the cam includes a cylindrical cam portion located on the outer periphery of its own rotation axis, and the latch includes a driven portion that abuts against the cylindrical cam portion; during the process of the first door rotating from the first closed position to the first open position, the crank and connecting rod drive the cam to rotate, and the cylindrical cam portion forces the latch to move towards the unlocked position.

[0024] As can be seen above, when the user opens the first door, the crank connecting rod drives the cam to rotate. Since the axial height of the cylindrical cam gradually changes along the circumference, the cylindrical cam gradually lifts the latch as it rotates, smoothly pushing the latch to the unlock position to unlock the second door.

[0025] A further embodiment includes a reset member, under the restoring force of the reset member, the latch tends to move towards the locked position; the connecting rod is provided with a latching part; the cam member is provided with a slide groove extending along its own circumference, the slide groove is provided with a recess recessed into its own inner wall surface; when the latching part is located in the recess, the cam member can be driven by the connecting rod to rotate in the first rotation direction; when the latching part is located in the slide groove, under the action of the reset member, the driven part abuts against the cylindrical cam part to force the cam member to rotate in the second rotation direction.

[0026] As can be seen from the above, this setting is used to enable the bolt to automatically return to the locked position after the first door is opened and the second door is unlocked. In particular, when the second door needs to be closed, the user no longer needs to operate the first door to manipulate the state of the bolt. During the process of closing the second door, the second door can force the bolt to move from the locked position to the unlocked position. When the second door reaches the second closed position, the bolt automatically returns to the locked position under the force of the reset component and engages with the second door.

[0027] The cutting machine provided by the second objective of this utility model includes the aforementioned door assembly. Attached Figure Description

[0028] Figure 1 This is a structural diagram of the first embodiment of the cutting machine of this utility model in the closed state.

[0029] Figure 2 This is a structural diagram of the first embodiment of the cutting machine of this utility model in its open state.

[0030] Figure 3 This is a structural diagram from a first perspective of the first embodiment of the door component of this utility model.

[0031] Figure 4 This is a structural diagram from a second perspective of the first embodiment of the door component of this utility model.

[0032] Figure 5 This is an exploded view of the structure of the first damping mechanism and the linkage mechanism in the first embodiment of the door assembly of this utility model.

[0033] Figure 6 for Figure 3 Enlarged view of point A in the middle.

[0034] Figure 7 This is a cross-sectional view showing the location of the first damping mechanism in the first embodiment of the door assembly of this utility model.

[0035] Figure 8 This is an exploded view of the structure of the second damping mechanism in the first embodiment of the door assembly of this utility model.

[0036] Figure 9 This is a cross-sectional view showing the location of the second damping mechanism in the first embodiment of the door assembly of this utility model.

[0037] Figure 10 This is a cross-sectional view showing the location of the first damping mechanism in the second embodiment of the door assembly of this utility model. Detailed Implementation

[0038] First embodiment of door assembly and cutting machine See Figure 1 and Figure 2 The cutting machine includes a door assembly, which comprises a first door 1 and a second door 2. The first door 1 is actually a dust cover, and the second door 2 is actually a tray. Both the first door 1 and the second door 2 are rotatable. The first door 1 is located on the upper side of the cutting machine, and the second door 2 is located on the front side of the cutting machine. The first door 1 can rotate around a first axis to a first closed position. Figure 1 (shown) and the first open position ( Figure 2 Between (shown), the second door 2 can rotate around the second axis to the second closed position (shown). Figure 1 (shown) and the second open position ( Figure 2 Between the two axes (as shown), the first axis is parallel to the second axis, and both the first and second axes extend along the width direction of the cutting machine (the x-axis direction shown in the figure).

[0039] See Figures 3 to 5 In this embodiment, the door assembly includes a first door 1 and a second door 2, as well as a transmission component 19, a frame 3, a linkage mechanism 4, a first damping mechanism 5, a second damping mechanism 6, a locking tongue 7, and a reset component 79.

[0040] like Figure 4 As shown, the frame 3 includes two side walls 31, which are respectively arranged on both sides of the width of the frame 3. In the width direction, the first door 1 and the second door 2 are both arranged between the two side walls 31. The linkage mechanism 4, the first damping mechanism 5, the second damping mechanism 6 and the locking tongue 7 are all arranged on the outside of the side walls 31. Specifically, the outside of each of the two side walls 31 is provided with a first damping mechanism 5 and a second damping mechanism 6, while only the outside of one side wall 31 is provided with the linkage mechanism 4 and the locking tongue 7.

[0041] Both the first door 1 and the second door 2 are rotatably connected to the frame 3. The locking tongue 7 is mounted on the frame 3 and can move along the aforementioned width direction between the locked and unlocked positions. Figure 4 As shown, the latch 7 includes a locking part 711. When the latch 7 is in the locked position, the locking part 711 passes through the side wall 31 and protrudes from the inner surface of the side wall 31; as Figure 3 As shown, the second door 2 has a locking slot 21 on its side. When the second door 2 is in the second closed position and the latch 7 is in the locked position, the locking part 711 is inserted into the locking slot 21 so that the second door 2 is kept in the second closed position.

[0042] See Figure 5 and Figure 6 The locking tongue 7 includes a first part 71 and a second part 72 connected along the width direction. A locking part 711 is provided on the first part 71, and a driven part 721 is provided on the second part 72. The locking tongue 7 needs to be installed on the side wall 31 and connected to the cam member 43. The locking tongue 7 is designed with detachable first part 71 and second part 72, which makes it easier to assemble the locking tongue 7 with the side wall 31 and the cam member 43.

[0043] Furthermore, the reset member 79 is a compression spring, and the bolt passes through the through hole of the reset member 79 and the first member 71 along the width direction and is threaded to the side wall 31. Since the bolt is fixed and the locking tongue 7 is movable, and the reset member 79 abuts between the bolt head and the locking tongue 7, this arrangement causes the locking tongue 7 to tend to move towards the locked position under the restoring force of the reset member 79.

[0044] Furthermore, the second piece 72 is provided with a connecting rod extending in the width direction, and the driven part 721 is connected to the end of the connecting rod and extends in a direction perpendicular to the width direction. The connecting rod and the driven part 721 are in a "T" shape. Furthermore, the driven part 721 has an abutting surface facing the first piece 71 in the width direction, and the abutting surface is set as an arc surface.

[0045] See also Figure 5 and Figure 6 The transmission component 19 is located at the first axis (the rotation axis of the first door 1) and is rotatably connected to the side wall 31. The transmission component 19 includes a first gear portion 191 and a first door connecting portion 192 arranged opposite to each other along the width direction (the axial direction of the first axis). The first door 1 is fixedly connected to the first door connecting portion 192 by bolts. The transmission component 19 realizes the rotatable connection between the first door 1 and the frame 3, and enables the first gear portion 191 to be used as the output portion when the first door 1 rotates.

[0046] Crank 41 is rotatably connected to frame 3. Crank 41 includes a third gear 411 around its own rotation axis, which meshes with the first gear 191. This arrangement allows crank 41 to be driven to rotate by the first door 1.

[0047] The cam member 43 is rotatably connected to the frame 3, and the rotation axis of the cam member 43 is parallel to the rotation axis of the crank 41 and both extend in the width direction. The cam member 43 includes a cylindrical cam portion 432 located on the outer periphery of its own rotation axis. Further, the cylindrical cam portion 432 conforms to the design of a cylindrical cam in the field of mechanical design. The cylindrical cam portion 432 is a transmission inclined surface that extends circumferentially along the rotation axis of the cam portion 43, is axially arranged towards the axis, and gradually changes its axial position at the rotation axis. Preferably, it also includes a cam reset member that provides a restoring force for the rotational reset of the cam portion 43. The cam reset member can be a torsion spring or a tension spring.

[0048] Furthermore, the cam portion 43 is provided with an insertion hole 433 that extends through itself along its width. After the driven portion 721 of the second piece 72 is inserted into the side opposite to the cylindrical cam portion 432 and passes through the insertion hole 433, the second piece 72 is rotated 90 degrees about its connecting rod as the axis, and then the driven portion 721 of the second piece 72 is opposite to the cylindrical cam portion 432. Then, after the second piece 72 is connected to the first piece 71 by bolts, under the restoring force of the reset member 79, the driven portion 721 of the second piece 72 abuts against the cylindrical cam portion 432.

[0049] Furthermore, the cam member 43 is provided with a groove 430 extending circumferentially, and the groove 430 is provided with a recess 431 recessed in its inner wall surface, wherein the recess 431 is recessed from the inner wall surface of the groove 430 toward the rotation axis of the cam member 43. Both the groove 430 and the recess 431 are located on the outer periphery of the rotation axis of the cam member 43. In the aforementioned circumferential direction, the recess 431 connects to the extended end of the 430.

[0050] Connecting rod 42 is rotatably connected between crank 41 and cam member 43. The first end of connecting rod 42 is rotatably connected to the swing end of crank 41, and the second end of connecting rod 42 has a fastening portion 429 extending in the width direction after bending from the end of its main body. The fastening portion 429 fastens into a groove 430 or recess 431 in the width direction. When cam member 43 rotates, the fastening portion 429 can also rotate relative to the groove 430 or recess 431. Therefore, the connection between connecting rod 42 and cam member 43 is also a rotatable connection of this utility model.

[0051] Combined Figure 1 The second door 2 is equipped with a handle position 200. When the cutting machine is in... Figure 1 In the state shown, the latching part 429 is in the recess 431. When the user's hand reaches into the latch position 200, the first door 1 can be easily lifted upwards. Under the external force provided by the hand, the first door 1 moves from the first closed position to the first open position. During this process, the first gear part 191 meshes with the third gear part 411 to drive the crank 41 to rotate, and then drives the cam part 43 to rotate in the first rotation direction via the connecting rod 42. Figure 6 As shown in direction a), the cylindrical cam 432 rotates, forcing the bolt 7 to move away from the second door 2 along the width direction, and finally the bolt 7 reaches the unlocked position. When the bolt 7 reaches the unlocked position, the locking part 711 exits the locking slot 21 of the second door 2, and the second door 2 is unlocked.

[0052] See also Figure 6 When the engaging portion 429 is located in the recess 431, the engaging portion 429 restricts the rotation of the cam member 43. And when the cam member 43 rotates along the first rotation direction (… Figure 6When rotated to a certain angle (in the direction shown in a), the outlet of recess 431 changes direction, and the fastening part 429 will disengage from the outlet of recess 431.

[0053] When the engaging part 429 disengages from the recess 431, the engaging part 429 no longer restricts the rotation of the cam member 43. At this time, under the restoring force of the reset member 79, or under the restoring force of the reset member 79 and the cam reset member of the cam member 43 (not shown in the figure), the cam member 43 will rotate and reset in a second rotation direction opposite to the first rotation direction. Subsequently, the locking tongue 7 will also reset to the locked position under the restoring force of the reset member 79. Under the restoring force of the reset member 79, the locking tongue 7 moves towards the second door 2 in the width direction. During this process, the driven part 721 presses against the cylindrical cam part 432 and forces the cam member 43 to rotate and reset in a second rotation direction opposite to the first rotation direction.

[0054] In the absence of a cam reset component, the driven part 721 of the latch 7 becomes the driving part under the restoring force of the reset component 79, forcing the cylindrical cam part 432 to rotate, thus resetting the cam component 43. This configuration ensures that the latch 7 automatically resets to the locked position after the first door 1 is opened and the second door 2 is unlocked.

[0055] See Figure 5 and Figure 7 The first damping mechanism 5 is provided corresponding to the first door 1. The first damping mechanism 5 includes a first rotating member 51, a first damping elastic member 52, a first positioning member 53, and a first cover member 54. The first damping elastic member 52 is a pressure spring.

[0056] The first cover 54 is connected to the side wall 31 of the frame 3, and a first damping mounting cavity 540 is formed between them. In this embodiment, the first damping mounting cavity 540 is formed in the first cover 54, and the side wall 31 of the frame 3 blocks the installation entrance of the first damping mounting cavity 540. The first rotating member 51, the first damping elastic member 52, and the first positioning member 53 are all disposed in the first damping mounting cavity 540, and the first cover 54, the first positioning member 53, the first damping elastic member 52, and the first rotating member 51 abut against each other in sequence.

[0057] The first cover 54 is fitted over the first rotating member 51, meaning the first rotating member 51 is located in the first damping mounting cavity 540. The first rotating member 51 can rotate relative to the first cover 54 due to the constraint of the cylindrical surface of the inner circumferential wall of the first damping mounting cavity 540. In the width direction (axial direction of the first axis), there is a gap between the first cover 54 and the side wall 31. The first rotating member 51 is provided with a second gear tooth portion 511, and the first gear portion 191 meshes with the second gear portion 511 within the aforementioned gap.

[0058] A first mounting channel 510 is formed inside the first rotating member 51. The first mounting channel 510 is located in the first damping mounting cavity 540. The first damping elastic member 52 and the first positioning member 53 are both located in the first mounting channel 510.

[0059] The second axial end of the first positioning member 53 is provided with a first spline 532, and the first cover member 54 is provided with a first spline hole 541. The first spline 532 is inserted into the first spline hole 541 along the axial direction of the first rotating member 51. In this way, the first cover member 54 restricts the rotation of the first positioning member 53.

[0060] The first positioning member 53 has a first linear groove 531 at its first axial end. The first linear groove 531 extends through the first positioning member 53 in a direction perpendicular to its width and opens in the width direction. The first damping elastic member 52 has a first linear arm 521 at its first axial end. The first linear arm 521 extends in a direction perpendicular to its width and is disposed in the first linear groove 531. Since the first positioning member 53 cannot rotate, this configuration restricts the first damping elastic member 52 from rotating around the rotation axis of the first rotating member 51. The first linear groove 531 and the first linear arm 521 are respectively the first positioning groove and the first positioning arm of this utility model.

[0061] A second linear arm 512 is provided at the second axial end of the first damping elastic member 52. A positioning post is provided in the first mounting channel 510 of the first rotating member 51. A recessed second linear groove 512 is provided on the positioning post. Both the second linear arm 512 and the second linear groove 512 extend in a direction perpendicular to the width direction. The second linear arm 512 is disposed within the second linear groove 512. The second linear groove 512 and the second linear arm 512 are respectively the second positioning groove and the second positioning arm of this utility model.

[0062] When the first door 1 rotates, under the action of external force, the first damping elastic element 52 is driven to twist during the process of rotating from the first closed position to the first open position. Thus, the torsional restoring force of the first damping elastic element 52 becomes the damping force that hinders the rotation of the first door 1.

[0063] In addition, in this embodiment, the outer diameter of the first damping elastic member 52 is matched with the inner diameter of the first mounting channel 510. Thus, when the first damping elastic member 52 is twisted, the outer diameter increases slightly. At this time, the outer peripheral surface of the first damping elastic member 52 and the inner peripheral surface of the first mounting channel 510 generate frictional engagement, thereby providing auxiliary damping force.

[0064] See Figure 8 and Figure 9The second damping mechanism 6 is provided corresponding to the second door 2. The second damping mechanism 6 includes a second rotating member 61, a second damping elastic member 62, a second positioning member 63, and a second cover member 64. The second damping elastic member 62 is a pressure spring.

[0065] The second cover 64 is connected to the side wall 31 of the frame 3, and a second damping mounting cavity 360 is formed between them. Further, the side wall 31 includes a peripheral wall 36 that protrudes away from the second door 2 in the width direction, and the second damping mounting cavity 360 is formed in the peripheral wall 36. The second cover 64 is configured as a cover plate to block the mounting entrance of the second damping mounting cavity 360.

[0066] The second rotating member 61, the second damping elastic member 62, and the second positioning member 63 are all disposed in the second damping mounting cavity 640, and the second cover member 64, the second positioning member 63, the second damping elastic member 62, and the second rotating member 61 abut against each other in sequence.

[0067] Constrained by the cylindrical surface of the inner peripheral wall of the second damping mounting cavity 640, the second rotating member 61 can rotate relative to the second cover member 64. The side wall 31 has a connecting hole 3601 located at the end of the second damping mounting cavity 360. The second rotating member 61 has a second door connecting portion 612, which passes through the connecting hole 3601 and connects to the second door 2. The second door connecting portion 612 is a shaft segment with a "D"-shaped cross-section, and it is inserted into the "D"-shaped shaft hole 20 of the second door 2.

[0068] A second mounting channel 610 is formed within the second rotating member 61, and the second damping elastic member 62 and the second positioning member 63 are both positioned within the second mounting channel 610. The second axial end of the second positioning member 63 is provided with a second spline 632, and the second cover member 64 is provided with a second spline hole 641. The second spline 632 is inserted into the second spline hole 641 along the axial direction of the second rotating member 61, thereby restricting the rotation of the second positioning member 63 by the second cover member 64.

[0069] The second positioning member 63 has a third straight groove 631 at its first axial end. The third straight groove 631 extends through the second positioning member 62 in a direction perpendicular to its width and opens in the width direction. The second damping elastic member 62 has a third straight arm 621 at its second axial end. The third straight arm 621 extends through the second positioning member 62 in a direction perpendicular to its width and is disposed in the third straight groove 631. Since the second positioning member 63 cannot rotate, this arrangement restricts the second damping elastic member 62 from rotating around the rotation axis of the second rotating member 61. The third straight groove 631 and the third straight arm 621 are respectively the first positioning groove and the first positioning arm of this utility model.

[0070] A positioning post is provided in the second mounting channel 610 of the second rotating member 61. The positioning post has a recessed fourth linear groove 613. A fourth linear arm 622 is provided at the second axial end of the second damping elastic member 62. Both the fourth linear groove 613 and the fourth linear arm 622 extend in a direction perpendicular to the width direction, with the fourth linear arm 622 positioned within the fourth linear groove 613. The fourth linear groove 613 and the fourth linear arm 622 are respectively the second positioning groove and the second positioning arm of this utility model.

[0071] The second axial end of the second damping elastic element 62 abuts against the axial end face of the second mounting channel 610 of the second rotating element 61. When the second door 2 rotates, under the action of its own weight or a combination of its own weight and an external force (such as the restoring force of a torsion spring), during the process of the second door 2 rotating from the second closed position to the second open position, since the second positioning element 63 does not rotate, the second damping elastic element 62 connected between the second positioning element 63 and the second rotating element 61 is torn. Thus, the torsional restoring force of the second damping elastic element 62 becomes a resistance that hinders the rotation of the second door 2.

[0072] Thus, during the opening of the first door 1 and the second door 2, under the action of their respective damping mechanisms, the second door 2 will slowly open downwards, preventing it from colliding with the machine or the ground due to excessive speed; while the first door 1 can continue to be manually opened or released by the user and will automatically open under the action of spring force. In addition, when the first door 1 closes, it swings downwards, and the resistance provided by its corresponding damping mechanism can also prevent the first door 1 from swinging downwards too quickly and colliding with the machine.

[0073] Second embodiment of door assembly and cutting machine See Figure 10 And compare Figure 7 Unlike the first embodiment, in this embodiment, the first rotating member 81 and the second axial end 829 of the first damping elastic member 82 abut against each other and are in frictional engagement. With this configuration, when the first door and the first rotating member 81 rotate, the first damping elastic member 82 does not rotate, and friction is generated between the first rotating member 81 and the first damping elastic member 82. This friction generates a damping effect that hinders the rotation of the first door.

[0074] Furthermore, in this configuration, the direct cover 83 directly serves as a positioning element. The cover 83 has a first positioning groove 831, which engages with the first positioning arm 821 at the first axial end of the first damping spring 82. Since damping is achieved through axial friction, the adjustment of the spline and spline hole, as in the first embodiment, does not produce an adjustment effect, thus reducing the number of components and simplifying the structure.

[0075] In other embodiments, only the first door has a corresponding damping mechanism, or only the second door has a corresponding damping mechanism. Even if only one door has a corresponding damping mechanism, since this utility model does not require pressing buttons, the user can use both hands to support the two doors in advance to avoid collisions. For example, when the user opens the machine, their hand will inevitably be on the first door. Even if the second door panel does not have the first damping mechanism, the user can use their other hand to support it in advance before the second door opens to avoid collisions.

[0076] Finally, it should be emphasized that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A door assembly, comprising a frame, a first door, a second door, and a latch, wherein the first door is rotatably connected to the frame, the second door is rotatably connected to the frame, and the latch is connected to the frame and movable between a locked position and an unlocked position; Its features are: The latch, in the locked position, locks the second door in the second closed position; The door assembly also includes a linkage mechanism and a damping mechanism; The linkage mechanism is located between the first door and the bolt. During the process of the first door rotating from the first closed position to the first open position, the linkage mechanism is forced to drive the bolt to move towards the unlocked position. One of the damping mechanisms is provided for the second door, and when the latch is in the unlocked position, the second door rotates to the second open position under its own weight or external force, and the damping mechanism provides resistance to the rotation of the second door during the process; and / or, another damping mechanism is provided for the first door, and when the first door rotates from the first closed position to the first open position under the action of external force, the damping mechanism provides resistance to the rotation of the first door.

2. The door assembly according to claim 1, characterized in that: The damping mechanism includes a damping elastic element and a rotating element; When the rotating member rotates, the elastic force of the damping elastic member provides a frictional force that hinders the rotation of the rotating member, or the torsional restoring force of the damping elastic member hinders the rotation of the rotating member; In the damping mechanism corresponding to the first door, the rotating component is connected to the first door in a transmission manner; In the damping mechanism corresponding to the second door, the rotating component is connected to the second door in a transmission manner.

3. The door assembly according to claim 2, characterized in that: The damping mechanism further includes a positioning element, which is fixedly connected to the frame. The positioning element is provided with a first positioning groove. The damping elastic element includes a first positioning arm, which is disposed in the first positioning groove to restrict the damping elastic element from rotating around the axis of the rotating element. The damping elastic element abuts against the rotating element along the axial direction of the rotating element and the two are in frictional engagement; or, the rotating element is provided with a second positioning groove, the damping elastic element includes a second positioning arm, the second positioning arm is disposed in the second positioning groove, and when the rotating element rotates, the damping elastic element is driven to twist.

4. The door assembly according to claim 3, characterized in that: The damping mechanism further includes a cover, which is connected to the frame and forms a damping mounting cavity between them. The rotating component, the damping elastic component, and the positioning component are all disposed within the damping mounting cavity, and the cover, the positioning component, the damping elastic component, and the rotating component abut against each other in sequence.

5. The door assembly according to claim 4, characterized in that: The door assembly further includes a transmission component, which is rotatably connected to the frame. The transmission component includes a first gear portion and a first door connecting portion. In the damping mechanism corresponding to the first door, the rotating component includes a second gear portion. The first door connecting portion is connected to the first door, and the first gear portion meshes with the second gear portion. And / or, The frame is provided with a connecting hole. In the damping mechanism corresponding to the second door, the rotating member is provided with a second door connecting part. The second door connecting part passes through the connecting hole and connects to the second door.

6. The door assembly according to claim 4, characterized in that: The damping mounting cavity where the damping mechanism corresponding to the first door is located is disposed in the cover, and the frame blocks the installation entrance of the damping mounting cavity; or, The damping mounting cavity, where the damping mechanism corresponding to the second door is located, is set on the frame, and the cover block the installation entrance of the damping mounting cavity.

7. The door assembly according to claim 4, characterized in that: The cover restricts the rotation of the positioning member.

8. The door assembly according to claim 7, characterized in that: The second positioning arm is disposed in the second positioning slot, and further includes: The positioning member is provided with a first anti-rotation part, and the cover member is provided with a second anti-rotation part, the first anti-rotation part and the second anti-rotation part cooperate with each other; One of the first anti-rotation part and the second anti-rotation part is a spline, and the other of the first anti-rotation part and the second anti-rotation part is a spline hole.

9. The door assembly according to any one of claims 1 to 8, characterized in that: The linkage mechanism includes a crank, a connecting rod, and a cam. The crank is rotatably connected to the frame and is driven to rotate by the first door; The cam component is rotatably connected to the frame, and the connecting rod is rotatably connected between the crank and the cam component; The cam component includes a cylindrical cam portion located on the outer periphery of its own rotation axis, and the locking tongue includes a driven portion that abuts against the cylindrical cam portion; During the process of the first door rotating from the first closed position to the first open position, the crank and the connecting rod drive the cam to rotate, and the cylindrical cam portion forces the latch to move towards the unlocked position.

10. The door assembly according to claim 9, characterized in that: The door assembly also includes a reset member, under the restoring force of the reset member, the latch tends to move toward the locked position; The connecting rod is provided with a fastening part; The cam component is provided with a sliding groove extending along its own circumference, and the sliding groove is provided with a recessed position recessed into its own inner wall surface; When the fastening part is located in the recess, the cam can be driven by the connecting rod to rotate in the first rotation direction; When the engaging part is located in the slide groove, under the action of the resetting member, the driven part abuts against the cylindrical cam part to force the cam member to rotate in the second rotation direction.

11. A cutting machine characterized by Includes the door assembly described in any one of claims 1 to 10.

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