Linear drive device with buffering and avoidance function and garbage bin

Abstract

The present invention relates to the technical field of linear actuators, and is a linear actuator device and a trash can with a buffering avoidance function, including a linear actuator, an actuator mounting frame and a pin assembly, wherein a cylinder body is mounted on the actuator mounting frame through the pin assembly, and the cylinder body has a locking mode and a sliding mode. In the locking mode, the cylinder body has a fixed position relative to the actuator mounting frame, and in the sliding mode, the cylinder body can slide left and right relative to the actuator mounting frame; the cylinder body can switch from the locking mode to the sliding mode when the left end of the piston rod is subjected to an axial force of a certain size and in a direction close to the cylinder body. The present invention can not only control the normal opening and closing of the garbage slot, but also when the opened slot cover is pressed down by an external force, the cylinder body can switch from the locking mode to the sliding mode, so that the piston rod can retreat to the right with the cylinder body, thereby preventing the piston rod from being bent by an external force and causing the linear actuator to be damaged or fail, thereby ensuring the service life of the entire linear actuator.

Description

Technical Field

[0001] The invention relates to the technical field of linear drive, in particular to a linear drive device and a garbage bin with buffering and avoiding functions. Background Art

[0002] With the improvement of environmental protection concepts and the development of technology, more and more places have begun to use smart trash cans. The opening method of the inlet cover of smart trash cans is automatic opening. Generally, the inlet cover is controlled to flip and open by the cooperation of a sensor and a driver with a piston rod. When people are close to the trash can at a certain distance, the sensor transmits a signal to the controller, and then the controller controls the piston rod of the driver to extend outward to drive the inlet cover to flip upward to open the garbage inlet. When people have thrown in the garbage and left, the controller controls the piston rod of the driver to retract to drive the inlet cover to flip back to close the garbage inlet. However, in actual use, a small number of people are accustomed to pressing down the inlet cover to close the garbage inlet after throwing in the garbage. Since the piston rod cannot retreat in time at this time, the piston rod will be subjected to a pressure perpendicular to its axial direction. When the downward pressure is large enough, the piston rod will be bent or even damaged, which will cause the entire driver to fail and the inlet cover cannot be driven to open and close normally, affecting people's normal garbage throwing. Summary of the invention

[0003] The present invention provides a linear drive device and a trash can with a buffering and avoiding function, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem that the existing linear drive for pushing the opening cover of the trash can to open and close is easy to be damaged and fail.

[0004] One of the technical solutions of the present invention is achieved through the following measures: a linear drive device with a buffering avoidance function, including a linear drive, a drive mounting frame and a pin assembly, the linear drive including a horizontally arranged cylinder body and a piston rod arranged in the cylinder body and capable of reciprocating movement, the left end of the piston rod extends out of the cylinder body, the cylinder body is mounted on the drive mounting frame through the pin assembly, the cylinder body has a locking mode and a sliding mode, in the locking mode, the cylinder body has a fixed position relative to the drive mounting frame, in the sliding mode, the cylinder body can slide left and right relative to the drive mounting frame; the cylinder body can switch from the locking mode to the sliding mode when the left end of the piston rod is subjected to an axial force of a certain size and in a direction close to the cylinder body.

[0005] The following is a further optimization and / or improvement of one of the above-mentioned technical solutions:

[0006] A buffer groove may be provided on the above-mentioned driver mounting frame, and the pin assembly is slidably installed in the buffer groove. The pin assembly can move along the buffer groove between a locking position and a sliding position. When the pin assembly is in the locking position, the cylinder body is in a locking mode, and when the pin assembly is in the sliding position, the cylinder body is in a sliding mode; the pin assembly can move from the locking position to the sliding position when the left end of the piston rod is subjected to an axial force of a certain size in a direction close to the cylinder body; when the pin assembly is in the sliding position, the pin assembly can slide to the left along the buffer groove when the cylinder body is retracted relative to the piston rod and finally return to the locking position.

[0007] The above-mentioned driver mounting frame may include two front and rear mounting plates, and a group of buffer grooves are symmetrically opened on the front and rear mounting plates. The pin assembly includes a pin shaft, and a pin shaft hole is provided at the rear of the cylinder body. The pin shaft passes through the front buffer groove, the pin shaft hole and the rear buffer groove in sequence to install the cylinder body between the front and rear mounting plates; the buffer groove includes a locking section that puts the pin assembly in a locking position and a sliding section that puts the pin assembly in a sliding position. The locking section is inclined with the left side lower and the right side higher, and the sliding section is horizontal or serrated. There are several blocking positions set at intervals in the serrated sliding section. When the pin assembly slides to the right along the sliding section to the blocking position, the pin assembly can only slide out of the blocking position when the left end of the piston rod is subjected to an axial force of sufficient size and in a direction close to the cylinder body.

[0008] The inclination angle of the above-mentioned locking section can be 55 degrees to 85 degrees; the serrated sliding section is composed of several single sections connected end to end, each single section includes a first inclined section with a higher left and a lower right section and a second inclined section with a lower left and a higher right section, the right end of the first inclined section is connected to the left end of the second inclined section, and the connection between the first inclined section and the second inclined section constitutes a blocking position, the inclination angle of the first inclined section is 135 degrees to 180 degrees, and the inclination angle of the second inclined section is 55 degrees to 85 degrees.

[0009] The above-mentioned linear drive device with buffering and avoidance function may also include a resistance adjustment mechanism; a top plate is fixedly connected between the tops of the front and rear mounting plates, the resistance adjustment mechanism includes a connecting frame, a compression spring, a spring guide column and an adjusting nut, the middle part of the connecting frame is hingedly mounted on the pin shaft, the upper part of the connecting frame is provided with a contact piece that can slide in contact with the bottom surface of the top plate when the cylinder body slides relative to the driver mounting frame, a compression spring is transversely provided at the rear part of the cylinder body corresponding to the position below the pin shaft hole, a spring guide column is transversely provided at the lower part of the connecting frame, the left end of the spring guide column is penetrated into the compression spring, an adjusting nut is threadedly connected to the spring guide column, and the right end of the compression spring and the adjusting nut are against each other.

[0010] The above-mentioned linear drive device with buffering and avoidance function may also include a resistance adjustment mechanism; the resistance adjustment mechanism includes a counterweight shaft, a counterweight block and a stopper, the counterweight shaft is arranged horizontally and the left end is fixedly connected to the rear part of the cylinder body, and several counterweight blocks are detachably installed on the counterweight shaft, and a stopper is provided on the counterweight shaft corresponding to the right side position of the counterweight block.

[0011] The linear actuator may be an electric push rod, a pneumatic cylinder or a hydraulic cylinder.

[0012] The second technical solution of the present invention is achieved through the following measures: a garbage bin, comprising a garbage bin body and a linear drive device with a buffering and avoidance function, a garbage opening is provided on the garbage bin body, a hinged shaft is provided at the garbage opening, a slot cover plate and a push arm that can rotate relatively are hingedly connected on the hinged shaft, the slot cover plate is sealed on the garbage opening and the slot cover plate can open the garbage opening when it is flipped upward, the push arm and the lower surface of the slot cover plate are abutted against each other and the push arm can push the slot cover plate to flip upward around the hinged shaft when it is flipped upward around the hinged shaft, the driver mounting frame is fixedly installed in the garbage bin body, and the left end of the piston rod is hinged to the push arm to push the push arm to flip upward around the hinged shaft when the piston rod extends to the left relative to the cylinder body.

[0013] The following is a further optimization and / or improvement of the second technical solution of the above invention:

[0014] The above-mentioned pushing arm may include a pushing rod, a connecting rod and an articulated sleeve. The articulated sleeve is rotatably sleeved on the outside of the articulated shaft. One end of the pushing rod is fixedly connected to the articulated sleeve. The pushing rod and the lower surface of the injection port cover plate are abutted against each other. One end of the connecting rod is fixedly connected to the articulated sleeve. The other end of the connecting rod is hinged to the left end of the piston rod. The end of the connecting rod hinged to the piston rod is connected to the right end of a return spring, and the left end of the return spring is connected to the front side wall of the box body.

[0015] The above-mentioned pushing arm may include a pushing rod, a connecting rod, an articulated sleeve and a counterweight. The articulated sleeve is rotatably sleeved on the outside of the articulated shaft. One end of the pushing rod is fixedly connected to the articulated sleeve. The pushing rod and the lower surface of the injection port cover plate are abutted against each other. One end of the connecting rod is fixedly connected to the articulated sleeve. The other end of the connecting rod is connected to the counterweight. The left end of the piston rod is hingedly connected to the middle part of the connecting rod.

[0016] The above-mentioned trash can may also include a sensor, a controller and a battery. The linear drive, the sensor and the battery are all connected to the controller. The sensor is installed on the front side of the trash can body, and the trash inlet faces upward or upper left.

[0017] The present invention has a reasonable and compact structure and is easy to use. It can not only control the normal opening and closing of the garbage opening, but also when the opened opening cover is pressed down by an external force, the cylinder body can switch from a locking mode to a sliding mode for buffering and avoidance, so that the piston rod can retreat to the right with the cylinder body, avoiding the piston rod from being bent by an external force and causing damage and failure of the linear drive, thereby ensuring the service life of the entire linear drive device and the normal delivery of garbage, and has the characteristics of safety, labor saving, simplicity and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 This is a schematic diagram of the main structure of the first embodiment.

[0019] Attached Figure 2 It is a schematic diagram of the main cross-sectional structure when the garbage inlet is opened in Example 1 and Example 6.

[0020] Attached Figure 3 It is a schematic diagram of the main cross-sectional structure when the garbage inlet is closed in Example 1 and Example 6.

[0021] Attached Figure 4 It is a schematic diagram of the front cross-sectional structure when the cylinder body is in the sliding mode after the injection port cover plate in Example 1 and Example 6 is pressed down with force.

[0022] Attached Figure 5 This is a schematic diagram of the main structure of the second embodiment.

[0023] Attached Figure 6 This is a schematic diagram of the main structure of Example 3.

[0024] Attached Figure 7 This is a schematic diagram of the main structure of Example 4.

[0025] Attached Figure 8 This is a schematic diagram of the main structure of Example 5.

[0026] Attached Fig. 9 This is a schematic diagram of the front cross-sectional structure of Example 7.

[0027] Attached Fig.10 It is a schematic diagram of the front cross-sectional structure of Example 8.

[0028] Attached Fig.11 This is a force analysis diagram of the pin shaft when the slot cover plate is not subjected to downward pressure in Example 1.

[0029] Attached Fig.12 This is a force analysis diagram of the pin shaft when the slot cover plate is subjected to downward pressure in Example 1.

[0030] The codes in the accompanying drawings are: 1 is a cylinder body, 2 is a piston rod, 3 is a mounting plate, 4 is a pin shaft, 5 is a locking section, 6 is a sliding section, 7 is a blocking position, 8 is a top plate, 9 is a connecting frame, 10 is a compression spring, 11 is a spring guide column, 12 is an adjusting nut, 13 is a contact piece, 14 is a counterweight shaft, 15 is a counterweight block, 16 is a stop piece, 17 is a garbage bin body, 18 is a garbage outlet, 19 is a cover plate for the outlet, 20 is a push rod, 21 is a connecting rod, 22 is a return spring, and 23 is a counterweight. DETAILED DESCRIPTION

[0031] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0032] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0033] The present invention will be further described below in conjunction with embodiments and drawings:

[0034] Embodiment 1: As shown in the attached Figure 1-4 As shown, the linear drive device with buffering avoidance function includes a linear drive, a drive mounting frame and a pin assembly. The linear drive includes a cylinder body 1 arranged horizontally and a piston rod 2 arranged in the cylinder body 1 and capable of reciprocating movement. The left end of the piston rod 2 extends out of the cylinder body 1. The cylinder body 1 is mounted on the drive mounting frame through the pin assembly. The cylinder body 1 has a locking mode and a sliding mode. In the locking mode, the cylinder body 1 has a fixed position relative to the drive mounting frame. In the sliding mode, the cylinder body 1 can slide left and right relative to the drive mounting frame; the cylinder body 1 can switch from the locking mode to the sliding mode when the left end of the piston rod 2 is subjected to an axial force of a certain size and in a direction close to the cylinder body 1.

[0035] When in use, the device is installed in a garbage bin, which includes a garbage bin body 17, on which a garbage inlet 18 facing the upper left is provided, and a hinged shaft is provided at the garbage inlet 18, on which a relatively rotatable inlet cover 19 and a push arm are hingedly connected, the inlet cover 19 is sealed on the garbage inlet and the inlet cover 19 can open the garbage inlet 18 when flipped upward, the push arm and the lower surface of the inlet cover 19 are abutted against each other, and the push arm can push the inlet cover 19 to flip upward around the hinged shaft when flipping upward around the hinged shaft, the push arm includes a push rod 20, a connecting rod 21 and a hinged shaft sleeve, the hinged shaft sleeve is rotatably sleeved on the outside of the hinged shaft, one end of the push rod 20 is fixedly connected to the hinged shaft sleeve, and the push rod 20 The upper end of the connecting rod 21 is fixedly connected to the hinged sleeve, and the driver mounting frame is horizontally fixedly installed in the garbage bin body 17. Initially, the cylinder body 1 is in the locking mode, and the left end of the piston rod 2 is hinged to the lower end of the connecting rod 21, so that when the piston rod 2 is extended to the left relative to the cylinder body 1, it can push the push arm to flip upward around the hinge axis, thereby driving the garbage bin cover 19 to flip upward to open the garbage bin 18, and when the garbage bin 18 is in the open state, the connecting rod 21 is tilted lower on the left and higher on the right. The garbage bin also includes a sensor and a controller, and the linear driver and the sensor are connected to the controller, so that when people approach the garbage bin to put garbage in normally, the sensor sends a signal to the controller, and the controller The piston rod 2 of the control linear actuator is extended to lift the slot cover 19 to open the garbage slot 18. When the person is away from the garbage bin, the sensor sends a signal to the controller, and the controller controls the piston rod 2 of the linear actuator to retract, and the slot cover 19 goes down to close the garbage slot 18 again. However, when some people are in the habit of pressing down the slot cover 19 after throwing in the garbage, since the slot cover 19 is supported by the piston rod 2 through the push arm, the downward pressure causes the left end of the piston rod 2 to receive an axial force in the direction close to the cylinder body 1. The greater the downward pressure, the greater the axial force received by the piston rod 2. When the axial force received by the piston rod 2 reaches a certain size, the cylinder body 1 switches from the locking mode to the sliding mode. At this time, the cylinder body 1 is under the axial load of the piston rod 2. Under the action of the force, it can slide to the right relative to the driver mounting frame for buffering and avoidance, and the piston rod 2 moves to the right together with the cylinder body 1, thereby releasing the fixed support effect on the slot cover 19, so that the piston rod 2 will not be bent by the external force because it hinders the slot cover 19 from flipping back. When people have put the garbage in and are away from the garbage bin, the controller controls the piston rod 2 of the linear driver to retract. However, since the left end of the piston rod 2 is hinged to the push arm, the left end of the piston rod 2 is pulled and cannot be retracted into the cylinder body 1. At this time, the cylinder body 1 is in the sliding mode, so the cylinder body 1 can be recovered relative to the piston rod 2, that is, the cylinder body 1 can slide to the left relative to the driver mounting frame until it moves to the initial position and enters the locking mode again.

[0036] Through the configuration of the present device, it can be ensured that the cylinder body 1 can always be in the locking mode when there is no external force, so that the slot cover 19 is driven to flip through the extension and contraction of the piston rod 2, so as to realize the normal opening and closing of the garbage slot 18. When the opened slot cover 19 is pressed down by an external force, the cylinder body 1 can switch from the locking mode to the sliding mode for buffering and avoidance, so that the piston rod 2 can retreat to the right with the cylinder body 1, thereby preventing the piston rod 2 from being bent by an external force and causing damage and failure of the linear drive, thereby ensuring the service life of the entire linear drive device and ensuring the normal delivery of garbage.

[0037] The above embodiment 1 may be further optimized and / or improved according to actual needs:

[0038] As attached Figure 1-4 As shown, a buffer groove is provided on the driver mounting frame, and the pin assembly is slidably installed in the buffer groove. The pin assembly can move along the buffer groove between a locking position and a sliding position. When the pin assembly is in the locking position, the cylinder body 1 is in a locking mode, and when the pin assembly is in the sliding position, the cylinder body 1 is in a sliding mode; the pin assembly can move from the locking position to the sliding position when the left end of the piston rod 2 is subjected to an axial force of a certain size and in a direction close to the cylinder body 1; when the pin assembly is in the sliding position, the pin assembly can slide to the left along the buffer groove when the cylinder body 1 is retracted relative to the piston rod 2 and finally return to the locking position.

[0039] The switching of the cylinder body 1 between the locking mode and the sliding mode is achieved through the cooperation of the pin assembly and the buffer groove. In addition, when the cylinder body 1 is in the sliding mode, when the linear actuator receives the command from the controller to retract the piston rod, since the left end of the piston rod is restricted, the cylinder body 1 will be retracted relative to the piston rod 2, thereby driving the pin assembly to slide to the left along the buffer groove to the locking position, so that the cylinder body 1 is in the locking mode again.

[0040] As attached Figure 1-4 As shown, the driver mounting frame includes two front and rear mounting plates 3, and a group of buffer grooves are symmetrically opened on the front and rear mounting plates 3. The pin assembly includes a pin shaft 4, and a pin shaft hole is provided at the rear of the cylinder body 1. The pin shaft 4 passes through the front buffer groove, the pin shaft hole and the rear buffer groove in sequence to install the cylinder body 1 between the front and rear mounting plates 3; the buffer groove includes a locking section 5 that puts the pin assembly in a locking position and a sliding section 6 that puts the pin assembly in a sliding position. The locking section 5 is inclined with the left side lower and the right side higher, and the sliding section 6 is serrated. There are several blocking positions 7 set at intervals in the serrated sliding section 6. When the pin assembly slides to the right along the sliding section 6 to the blocking position 7, the pin assembly can only slide out of the blocking position 7 when the left end of the piston rod 2 is subjected to an axial force of sufficient size and in a direction close to the cylinder body 1.

[0041] As attached Fig.11As shown, the force analysis of the pin shaft 4 is carried out when the slot cover plate 19 is in the open state. The pin shaft 4 is subjected to the total gravity G composed of its own gravity and the gravity of the cylinder. G is vertically downward. In addition, since the slot cover plate 19 is supported by the piston rod 2, the piston rod 2 is subjected to an axial force in the direction close to the cylinder body 1. The axial force generates a thrust F1 on the pin shaft 4. Since the locking section 5 is inclined with the left side lower and the right side higher, the pin shaft 4 is also subjected to an upward supporting force FN perpendicular to the inclination direction of the locking section 5. During the normal opening and closing process of the garbage slot 18, since the slot cover plate 19 is not subjected to the downward pressure applied by humans, the component of the thrust F1 on the pin shaft in the upward direction parallel to the inclination direction of the locking section is not greater than the component of G in the downward direction parallel to the inclination direction of the locking section. Therefore, the pin shaft 4 cannot move upward along the locking section, thereby ensuring that the cylinder body 1 is always in the locking mode during the normal opening and closing process of the garbage slot 18. As shown in the attached figure Fig.12 As shown, a force analysis is performed on the pin 4 when the slot cover 19 is subjected to an artificial downward pressure. At this time, the total gravity G composed of its own gravity and the gravity of the cylinder body 1 remains unchanged. Since the slot cover 19 is pressed downward, the downward pressure increases the axial force on the piston rod 2. The greater the axial force on the piston rod 2, the greater the thrust on the pin 4. When the axial force on the piston rod 2 reaches a certain magnitude, the thrust F1' on the pin 4 in the upward direction parallel to the inclination direction of the locking section is greater than the thrust G in the downward direction parallel to the inclination direction of the locking section, so that the pin 4 can move upward along the locking section 5 into the sliding section, and the cylinder body 1 moves to the right with the piston rod 2 for buffering and avoidance, thereby releasing the stable support effect of the piston rod 2 on the slot cover 19 and preventing the piston rod 2 from being bent.

[0042] Specifically, the serrated sliding section 6 has a plurality of blocking positions 7, so that when the pin shaft 4 slides to the right along the sliding section 6 and the slot cover plate 19 continues to flip downward, when the pin shaft 4 moves to the blocking position 7, it is blocked by the blocking position 7 and cannot continue to slide to the right, that is, the cylinder body 1 and the piston rod 2 cannot continue to move to the right, and the closing process of the slot cover plate 19 is blocked, thereby avoiding the situation that the slot cover plate 19 is easily pinched due to the rapid closing of the slot cover plate 19. At this time, if people continue to press down on the slot cover plate 19 with force, the pin shaft 4 withdraws from the blocking position 7 and continues to slide to the right, and the slot cover plate 19 continues to flip downward. When the pin shaft 4 moves to the next blocking position 7, it is blocked again, and the slot cover plate 19 is blocked and closed again, and so on. By arranging a plurality of blocking positions 7 at intervals in the sliding section 6, the slot cover plate 19 can be prevented from closing quickly when it is pressed down with force, which not only prevents the hand from being pinched but also reduces the impact force when the slot cover plate 19 is closed, thereby reducing damage to the equipment.

[0043] Specifically, the inclination angle of the locking section 5 is 55 degrees to 85 degrees; the serrated sliding section 6 is composed of several single sections connected end to end, each single section includes a first inclination section that is higher on the left and lower on the right and a second inclination section that is lower on the left and higher on the right, the right end of the first inclination section is connected to the left end of the second inclination section, and the connection between the first inclination section and the second inclination section constitutes a blocking position, the inclination angle of the first inclination section is 135 degrees to 180 degrees, and the inclination angle of the second inclination section is 55 degrees to 85 degrees. The inclination angle of the locking section is set to 55 degrees to 85 degrees, which can ensure that the pin shaft 4 is not easy to slide out of the locking section 4 during the normal opening and closing process of the garbage injection port 18. In this embodiment, the inclination angle of the locking section 5 is 67 degrees. The sliding section 6 is provided with a first inclined section and a second inclined section that are alternately connected in sequence. Therefore, when the pin shaft 4 moves to the blocking position 7, if the injection personnel do not continue to press down the injection port cover plate 19 at this time, the pin shaft 4 cannot continue to move along the second inclined section, that is, it is blocked at the blocking position 7. Only when the injection port cover plate 19 is subjected to artificial downward pressure again, and the piston rod 2 is subjected to an axial force of sufficient size and in a direction close to the cylinder body 1, the pin shaft 4 can pass through the blocking position 7 and continue to move along the first inclined section of the next single section. When the cylinder body 1 is retracted relative to the piston rod 2, the serrated channel formed by the first inclined section and the second inclined section will not hinder the pin shaft 4 from sliding to the left, thereby ensuring that the pin shaft can slide to the left to the locking position, so that the cylinder body 1 is in the locking mode again.

[0044] Specifically, the linear actuator is an electric push rod or a gas cylinder or a hydraulic cylinder. In this embodiment, the linear actuator is an electric push rod, and in other embodiments, the linear actuator may be a gas cylinder or a hydraulic cylinder.

[0045] Embodiment 2: As shown in the attached Figure 5 As shown, the difference between this embodiment and the first embodiment is that the top wall of the serrated sliding section 6 is a horizontal plane, and the bottom wall of the sliding section 6 is a serrated surface. The serrated surface is formed by connecting a number of tooth peak surfaces end to end, and each tooth peak surface includes a first inclined surface that is higher on the left and lower on the right and a second inclined surface that is lower on the left and higher on the right. The right end of the first inclined surface is connected to the left end of the second inclined surface, and the connection between the first inclined surface and the second inclined surface is the blocking position 7. Because the second inclined surface is inclined with lower left and higher right, when the pin shaft 4 moves to the bottom of the second inclined surface, if the pin shaft 4 is not lifted upward at this time, it cannot continue to move along the second inclined surface, that is, it is blocked at the blocking position 7. Only when the slot cover plate 19 is subjected to artificial downward pressure, the pin shaft 4 is lifted upward and can continue to move along the first inclined surface of the next tooth peak surface through the blocking position 7.

[0046] Embodiment 3: As shown in the attached Figure 6As shown, the difference between this embodiment and the first embodiment is that the sliding section 6 is horizontal. Therefore, when the pin shaft 4 moves from the locking section 5 to the sliding state, the cylinder body 1 can slide to the right relative to the driver mounting frame when the piston rod 2 is subjected to an external force parallel to the axial direction of the piston rod 2 and to the right, and can slide to the left relative to the driver mounting frame when the controller controls the piston rod 2 of the linear actuator to retract, until it moves to the initial position and enters the locking mode again.

[0047] Embodiment 4: As shown in the attached Figure 7 As shown, the difference between this embodiment and the first embodiment is that: the linear drive device with buffer avoidance function also includes a resistance adjustment mechanism; a top plate 8 is fixedly connected between the tops of the front and rear mounting plates 3, and the resistance adjustment mechanism includes a connecting frame 9, a compression spring 10, a spring guide column 11 and an adjusting nut 12. The middle part of the connecting frame 9 is hingedly mounted on the pin 4, and the upper part of the connecting frame 9 is provided with a contact piece 13 that can slide in contact with the bottom surface of the top plate 8 when the cylinder body 1 slides relative to the driver mounting frame. The rear part of the cylinder body 1 corresponding to the position below the pin 4 hole is laterally provided with a compression spring 10, and the lower part of the connecting frame 9 is laterally provided with a spring guide column 11, the left end of the spring guide column 11 is penetrated by the compression spring 10, and the spring guide column 11 is threadedly connected with an adjusting nut 12, and the right end of the compression spring 10 and the adjusting nut 12 are against each other.

[0048] In order for the cylinder body 1 to switch from the locking mode to the sliding mode, the rear part of the cylinder body 1 needs to move to the upper right along the locking section 5 so that the pin shaft 4 withdraws from the locking section 5 and moves to the sliding section 6. Through the setting of the resistance adjustment mechanism in this embodiment, when the rear part of the cylinder body 1 tends to move to the upper right, since the contact piece 13 always abuts against the bottom surface of the top plate 8, the cylinder body 1 must compress the compression spring 10 to move to the upper right. That is, in order for the cylinder body 1 to switch from the locking mode to the sliding mode, the resistance applied by the resistance adjustment mechanism must be overcome, and the resistance applied by the resistance adjustment mechanism can be adjusted by adjusting the position of the adjusting nut 12. Therefore, the resistance adjustment mechanism can realize the function of adjusting the external force required when the cylinder body 1 switches from the locking mode to the sliding mode. Specifically, the contact piece 13 is a roller.

[0049] Embodiment 5: As attached Figure 8As shown, the difference between this embodiment and the first embodiment is that the linear drive device with buffer avoidance function also includes a resistance adjustment mechanism; the resistance adjustment mechanism includes a counterweight shaft 14, a counterweight block 15 and a stopper 16. The counterweight shaft 14 is arranged horizontally and the left end is fixedly connected to the rear of the cylinder body 1. A number of counterweight blocks 15 are detachably mounted on the counterweight shaft 14, and a stopper 16 is provided on the counterweight shaft 14 corresponding to the right side of the counterweight block 15. The pin 4 is moved from the locking section 5 to the sliding section 6 by external force. What needs to be overcome is the gravity of the linear drive itself. The greater the gravity of the linear drive itself, the greater the external force required. Therefore, the gravity of the entire linear drive can be adjusted by adjusting the number of configuration blocks, thereby achieving the function of adjusting the size of the external force required when the cylinder body 1 switches from the locking mode to the sliding mode.

[0050] Embodiment 6: As attached Figure 2-4 As shown, a garbage bin comprises a garbage bin body 17 and a linear drive device with a buffering and avoiding function, a garbage opening 18 is provided on the garbage bin body 17, a hinge shaft is provided at the garbage opening 18, a relatively rotatable opening cover plate 19 and a push arm are hingedly connected on the hinge shaft, the opening cover plate 19 is sealed on the garbage opening and the opening cover plate 19 can open the garbage opening 18 when flipped upward, the push arm and the lower surface of the opening cover plate 19 are abutted against each other and the push arm can push the opening cover plate 19 to flip upward around the hinge shaft when flipping upward around the hinge shaft, the driver mounting frame is fixedly installed in the garbage bin body 17, the left end of the piston rod 2 is hinged to the push arm, so as to push the push arm to flip upward around the hinge shaft when the piston rod 2 extends to the left relative to the cylinder body 1.

[0051] In the normal garbage throwing state, the cylinder body 1 is in the locking mode, the left end of the piston rod 2 is hinged to the pushing arm, and when the piston rod 2 is extended to the left relative to the cylinder body 1, it can push the pushing arm to flip upward around the hinge axis, thereby driving the slot cover plate 19 to flip upward and open the garbage slot 18. When the piston rod 2 is retracted to the right relative to the cylinder body 1, it drives the pushing arm to flip downward around the hinge axis, and then the slot cover plate 19 automatically falls back and closes the garbage slot 18. That is, the automatic opening and closing of the garbage slot 18 can be achieved through the linear drive. When some people are accustomed to pressing the slot cover plate 19 down after throwing in the garbage, since the slot cover plate 19 is supported by the piston rod 2 at this time, the downward pressure will cause the left end of the piston rod 2 to be subjected to a certain magnitude of external force parallel to the axial direction of the piston rod 2 and in a direction close to the cylinder body 1. The greater the downward pressure, the greater the external force exerted on the piston rod 2. When the external force exerted on the piston rod 2 reaches When it reaches a certain size, the cylinder body 1 switches from the locking mode to the sliding mode. At this time, the cylinder body 1 can slide to the right relative to the driver mounting frame under the action of external force, and the piston rod 2 moves to the right with the cylinder body 1, thereby releasing the fixed support effect on the slot cover 19. As a result, the piston rod 2 will not be bent by the external force because it hinders the slot cover 19 from flipping back. When people have put the garbage in and are away from the garbage bin, the linear drive controls its piston rod 2 to retract into the cylinder body 1. However, since the left end of the piston rod 2 is hinged to the push arm, the left end of the piston rod 2 is pulled and cannot retract into the cylinder body 1. At this time, the cylinder body 1 is in the sliding mode, so under the interaction force between the piston rod 2 and the cylinder body 1, the cylinder body 1 can be recovered in the direction of the piston rod 2, that is, the cylinder body 1 can slide to the left relative to the driver mounting frame until it moves to the initial position and enters the locking mode again.

[0052] Through the configuration of the trash can, it can be ensured that the cylinder body 1 can always be in the locking mode when there is no external force, so that the slot cover 19 is driven to flip through the extension and retraction of the piston rod 2, and the normal automatic opening and closing of the garbage slot 18 is realized. When the opened slot cover 19 is pressed down by an external force, the cylinder body 1 can switch from the locking mode to the sliding mode, so that the piston rod 2 can retreat to the right with the cylinder body 1, avoiding the piston rod 2 being bent by external force and causing the linear drive to be damaged or fail, thereby ensuring the service life of the entire linear drive device and ensuring the normal delivery of garbage.

[0053] The above-mentioned embodiment 6 may be further optimized and / or improved according to actual needs:

[0054] As attached Figure 2-4As shown, the push arm includes a push rod 20, a connecting rod 21 and a hinge sleeve, the hinge sleeve is rotatably sleeved on the outside of the hinge shaft, one end of the push rod 20 is fixedly connected to the hinge sleeve, the push rod 20 and the lower surface of the slot cover 19 are against each other, one end of the connecting rod 21 is fixedly connected to the hinge sleeve, and the other end of the connecting rod 21 is hinged to the left end of the piston rod 2. Therefore, when the piston rod 2 extends to the left, it can drive the push rod 20 to flip upward around the hinge axis and then push the slot cover 19 to flip upward to open the garbage slot 18, and when the piston rod 2 retracts to the right, it can drive the push rod 20 to flip downward around the hinge axis, and then the slot cover 19 falls back under the action of gravity to close the garbage slot 18.

[0055] Specifically, the trash bin also includes a sensor, a controller and a battery. The linear drive, the sensor and the battery are all connected to the controller. The sensor is installed on the front side of the trash bin body 17, and the garbage opening 18 faces upward or to the upper left. According to the needs, the sensor, the controller and the battery can all adopt the existing known technology. The sensor can be a radar sensor, and the controller can be a PLC programmable controller. By setting the sensor, when a person approaches the trash bin, the sensor sends a signal to the controller, and the controller controls the piston rod 2 of the linear drive to extend to lift the opening cover 19 to open the garbage opening 18. When the person is away from the trash bin, the sensor sends a signal to the controller, and the controller controls the piston rod 2 of the linear drive to retract, and the opening cover 19 descends to close the garbage opening 18 again, thereby achieving the purpose of automatically opening and closing the garbage opening 18.

[0056] Embodiment 7: As attached Fig. 9 As shown, the difference between this embodiment and the sixth embodiment is that one end of the connecting rod 21 hinged with the piston rod 2 is connected to the right end of a return spring 22, and the left end of the return spring 22 is connected to the front side wall of the box body. During the normal opening and closing of the garbage slot, the slot cover 19 exerts a thrust on the piston rod 2 parallel to the axial direction of the piston rod 2 and in the direction close to the cylinder body 1. By setting the return spring 22, the return spring 22 exerts a pulling force on the piston rod 2 parallel to the axial direction of the piston rod 2 and in the direction away from the cylinder body 1, which can offset part of the above thrust, ensuring that the pin shaft 4 is less likely to slide out of the locking section 5 during the normal opening and closing of the garbage slot. In addition, since the return spring 22 always exerts a pulling force on the left end of the piston rod 2, when the controller controls the piston rod 2 of the linear actuator to retract, the left end of the piston rod 2 is pulled by the return spring 22 and cannot retract into the cylinder body 1, so that the cylinder body 1 can only be recovered relative to the piston rod 2, thereby ensuring that the cylinder body 1 enters the locking mode again.

[0057] Embodiment 8: The difference between this embodiment and embodiment 6 is that the push arm includes a push rod 20, a connecting rod 21, an articulated sleeve and a counterweight 23, the articulated sleeve is rotatably sleeved on the outside of the articulated shaft, one end of the push rod 20 is fixedly connected to the articulated sleeve, the push rod 20 and the lower surface of the slot cover 19 are against each other, one end of the connecting rod 21 is fixedly connected to the articulated sleeve, the other end of the connecting rod 21 is connected to the counterweight 23, and the left end of the piston rod 2 is articulated to the middle of the connecting rod 21. By setting the counterweight 23, when the controller controls the piston rod 2 of the linear actuator to retract, the configuration member 23 exerts a pulling force on the left end of the piston rod 2 parallel to the axial direction of the piston rod 2 and in a direction away from the cylinder body 1, resulting in the piston rod 2 being unable to retract into the cylinder body 1, and thus the cylinder body 1 can only be recovered relative to the piston rod 2, thereby ensuring that the cylinder body 1 enters the locking mode again.

[0058] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A linear drive device with a buffering avoidance function, characterized in that The linear actuator comprises a cylinder body arranged transversely and a piston rod arranged in the cylinder body and capable of reciprocating motion, the left end of the piston rod extends out of the cylinder body, the cylinder body is mounted on the actuator mounting frame through the pin assembly, and the cylinder body has a locking mode and a sliding mode. In the locking mode, the cylinder body has a fixed position relative to the actuator mounting frame, and in the sliding mode, the cylinder body can slide left and right relative to the actuator mounting frame; The cylinder body can be switched from the locking mode to the sliding mode when the left end of the piston rod is subjected to an axial force of a certain magnitude in a direction close to the cylinder body.

2. The linear drive device with buffering and avoidance function according to claim 1, characterized in that A buffer groove is provided on the driver mounting frame, and the pin assembly is slidably mounted in the buffer groove. The pin assembly can move along the buffer groove between a locking position and a sliding position. When the pin assembly is in the locking position, the cylinder body is in a locking mode, and when the pin assembly is in the sliding position, the cylinder body is in a sliding mode. The pin assembly can move from the locking position to the sliding position when the left end of the piston rod is subjected to an axial force of a certain magnitude in a direction close to the cylinder body; when the pin assembly is in the sliding position, the pin assembly can slide to the left along the buffer groove when the cylinder body is retracted relative to the piston rod and finally return to the locking position.

3. The linear drive device with buffering avoidance function according to claim 2, characterized in that the drive The mounting frame includes two front and rear mounting plates, and a group of buffer grooves are symmetrically opened on the front and rear mounting plates. The pin assembly includes a pin shaft, and a pin shaft hole is provided at the rear of the cylinder body. The pin shaft passes through the front buffer groove, the pin shaft hole and the rear buffer groove in sequence to install the cylinder body between the front and rear mounting plates; the buffer groove includes a locking section that puts the pin assembly in a locking position and a sliding section that puts the pin assembly in a sliding position. The locking section is inclined with the left side lower and the right side higher, and the sliding section is horizontal or serrated. There are several blocking positions set at intervals in the serrated sliding section. When the pin assembly slides to the right along the sliding section to the blocking position, the pin assembly can only slide out of the blocking position when the left end of the piston rod is subjected to an axial force of sufficient size and in a direction close to the cylinder body.

4. The linear drive device with buffering and avoidance function according to claim 3, characterized in that The inclination angle of the locking section is 55 degrees to 85 degrees; the serrated sliding section is composed of several single sections connected end to end, each single section includes a first inclined section that is higher on the left and lower on the right and a second inclined section that is lower on the left and higher on the right, the right end of the first inclined section is connected to the left end of the second inclined section, and the connection between the first inclined section and the second inclined section constitutes a blocking position, the inclination angle of the first inclined section is 135 degrees to 180 degrees, and the inclination angle of the second inclined section is 55 degrees to 85 degrees.

5. The linear drive device with buffering and avoiding function according to claim 3 or 4, characterized in that It also includes a resistance adjustment mechanism; a top plate is fixedly connected between the tops of the front and rear mounting plates, the resistance adjustment mechanism includes a connecting frame, a compression spring, a spring guide column and an adjusting nut, the middle part of the connecting frame is hingedly mounted on the pin shaft, the upper part of the connecting frame is provided with a contact piece that can slide in contact with the bottom surface of the top plate when the cylinder body slides relative to the driver mounting frame, a compression spring is transversely provided at the rear part of the cylinder body corresponding to the position below the pin shaft hole, a spring guide column is transversely provided at the lower part of the connecting frame, the left end of the spring guide column is penetrated into the compression spring, an adjusting nut is threadedly connected to the spring guide column, and the right end of the compression spring is against the adjusting nut.

6. The linear drive device with buffering and avoiding function according to claim 3 or 4, characterized in that It also includes a resistance adjustment mechanism; the resistance adjustment mechanism includes a counterweight shaft, a counterweight block and a stopper, the counterweight shaft is arranged horizontally and the left end is fixedly connected to the rear of the cylinder body, a number of counterweight blocks are detachably installed on the counterweight shaft, and a stopper is provided on the counterweight shaft corresponding to the right side of the counterweight block.

7. The linear drive device with buffering and avoiding function according to claim 1, 2, 3 or 4, characterized in that The linear actuator is an electric push rod, a pneumatic cylinder or a hydraulic cylinder.

8. A garbage bin using the linear drive device with buffering and avoiding function as claimed in any one of claims 1 to 7, characterized in that The utility model comprises a garbage bin body and a linear drive device with a buffering and avoiding function. The garbage bin body is provided with a garbage inlet, and a hinged shaft is provided at the garbage inlet. A relatively rotatable inlet cover and a push arm are hingedly connected on the hinged shaft. The inlet cover is sealed on the garbage inlet and can open the garbage inlet when flipped upward. The push arm and the lower surface of the inlet cover are abutted against each other and the push arm can push the inlet cover to flip upward around the hinged shaft when flipped upward around the hinged shaft. The driver mounting frame is fixedly installed in the garbage bin body, and the left end of the piston rod is hinged to the push arm, so as to push the push arm to flip upward around the hinged shaft when the piston rod extends to the left relative to the cylinder body.

9. The waste bin according to claim 8, characterized in that The push arm includes a push rod, a connecting rod and an articulated sleeve. The articulated sleeve is rotatably sleeved on the outside of the articulated shaft. One end of the push rod is fixedly connected to the articulated sleeve. The push rod and the lower surface of the injection port cover plate are abutted. One end of the connecting rod is fixedly connected to the articulated sleeve. The other end of the connecting rod is articulated to the left end of the piston rod. The end of the connecting rod hinged to the piston rod is connected to the right end of a return spring, and the left end of the return spring is connected to the front side wall of the box body.

10. The trash can according to claim 8, characterized in that The push arm includes a push rod, a connecting rod, an articulated sleeve and a counterweight. The articulated sleeve is rotatably mounted on the outside of the articulated shaft. One end of the push rod is fixedly connected to the articulated sleeve. The push rod and the lower surface of the injection port cover plate are abutted against each other. One end of the connecting rod is fixedly connected to the articulated sleeve. The other end of the connecting rod is connected to the counterweight. The left end of the piston rod is hingedly connected to the middle part of the connecting rod.

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