Heavy-load high acceleration device based on friction mode

Abstract

The invention relates to the field of acceleration devices, and discloses a friction-mode-based heavy-load high-acceleration device which comprises a rack, the rack is provided with a rotating part used for being connected with a load and further provided with a variable frequency motor, the rotating part and an output shaft of the variable frequency motor are coaxially and rotatably arranged, the rack is rotatably provided with a rotating shaft, and the output end of the variable frequency motor is coaxially connected with the rotating shaft. The rotating shaft is provided with an energy storage part, the variable frequency motor drives the rotating piece to rotate through the rotating shaft, a linkage piece is arranged between the rotating piece and the rotating shaft and comprises a first friction piece and a second friction piece which are arranged in a relative rotating mode, the first friction piece is connected with the rotating shaft, and the second friction piece is connected with the rotating piece; the driving structure is used for connecting or disconnecting power transmission between the first friction piece and the second friction piece.

Description

Technical Field

[0001] The present invention relates to the field of acceleration devices, and particularly to a large-load high-acceleration device based on a friction method. Background Art

[0002] At present, common acceleration devices mainly include several types such as electric acceleration, electromagnetic acceleration, and pneumatic acceleration. Electric acceleration drives a load to accelerate through a motor. According to the size of the load, the time required to accelerate the load to a specified speed is different, which can meet a wide range of loads, but the larger the load, the longer the required time. Electromagnetic acceleration uses electromagnetic force to lift and push an object. It can accelerate an object to a super high speed, but it is often used for the acceleration of microscopic particles and has a high cost. Pneumatic acceleration uses air as a medium, and converts the pressure energy of air into air jet kinetic energy through a fan, a pressure difference device, an air valve, etc. to accelerate an object and a load. The pneumatic acceleration has a long pre-preparation time, great difficulty in precise control of the air flow, and at the same time will produce noise pollution and poor acceleration sustainability.

[0003] For some specific occasions, such as quickly responding to a large load within a limited space range and performing actions such as lifting, towing, or intercepting the load, the above-mentioned existing acceleration devices are difficult to quickly respond within an extremely short time and the installation space of the device is limited. Based on this, the following improvements are proposed. Summary of the Invention

[0004] The present invention aims to provide a large-load high-acceleration device based on a friction method to solve the problem that the prior art cannot quickly respond to a large load within a limited space.

[0005] To achieve the above object, the present invention adopts the following technical solution: A large-load high-acceleration device based on a friction method, including a frame, the frame is provided with a rotating member for connecting a load, and is also provided with a variable-frequency motor. The rotating member is rotatably arranged coaxially with the output shaft of the variable-frequency motor. The frame is rotatably provided with a rotating shaft, the output end of the variable-frequency motor is coaxially connected to the rotating shaft, the rotating shaft is provided with an energy storage part, the variable-frequency motor drives the rotating member to rotate through the rotating shaft, and a linkage member is arranged between the rotating member and the rotating shaft. The linkage member includes a first friction member and a second friction member that are relatively rotatably arranged. The first friction member is connected to the rotating shaft, and the second friction member is connected to the rotating member. The linkage member is provided with a driving structure, and the driving structure is used to connect or disconnect the power transmission between the first friction member and the second friction member.

[0006] The beneficial effect of this solution is: This device adopts a friction transmission method, and transmits power through the friction force between the first friction member and the second friction member. The structure is relatively simple, which is convenient for manufacturing and maintenance. This design avoids a complex mechanical transmission structure and reduces the manufacturing cost. The device has significant advantages in scenarios that require quick response and high torque output.

[0007] Preferably, as an improvement, the first friction member is set as a brake disc, the brake disc is coaxially and slidably connected to the rotating shaft, the second friction member is set as a toothed disc, the toothed disc is coaxially and slidably connected to the rotating member, the movement trajectory of the driving structure intersects with the toothed disc, and the driving structure is used to press the toothed disc against the brake disc.

[0008] Preferably, as an improvement, the linkage member is set as a clutch, the rotating shaft includes a flywheel shaft for connecting the energy storage part and a spline shaft for connecting the clutch, and both between the flywheel shaft and the output shaft of the variable-frequency motor and between the flywheel shaft and the spline shaft are coaxially connected through couplings.

[0009] The beneficial effects are as follows: By connecting the flywheel shaft with the output shaft of the variable-frequency motor and the flywheel shaft with the spline shaft through couplings, it can ensure the stable transmission of power between different components. The coupling can not only transmit torque but also compensate for the relative displacement between the two shafts, thereby improving the overall operation stability of the system. The connection method between the flywheel shaft and the spline shaft adopts a coupling, making the structure compact and facilitating installation and maintenance.

[0010] Preferably, as an improvement, the brake disc is coaxially and slidably connected to the spline shaft. The clutch includes a drum coaxially and rotatably connected to the spline shaft, the drum is fixedly connected to the rotating member, tooth grooves corresponding to the external teeth of the toothed disc are provided in the inner circle of the drum, and the toothed disc is coaxially and slidably connected to the drum through the tooth grooves.

[0011] The beneficial effects are as follows: Since the drum is coaxially and rotatably connected to the spline shaft, and the toothed disc is coaxially and slidably connected to the drum through the tooth grooves, this design makes the entire clutch system more compact in space and facilitates installation and adjustment.

[0012] Preferably, as an improvement, the driving structure includes a hydraulic cylinder coaxially and fixedly connected to the end of the spline shaft, a swivel joint connected to the hydraulic cylinder, and a plurality of pistons coaxially and slidably connected to the hydraulic cylinder with respect to the spline shaft, and the sliding path of the pistons intersects with the toothed disc.

[0013] The beneficial effects are as follows: The design of this structure enables convenient operation of the pistons and the hydraulic cylinder during maintenance and adjustment, improving the maintainability of the system.

[0014] Preferably, as an improvement, a reset assembly is provided between both the brake disc and the toothed disc and the clutch.

[0015] Preferably, as an improvement, the rotating member is set as a winch, the winch is used for winding a flexible member acting on a load, the frame is provided with a first bracket for rotatably mounting the winch, the frame is provided with a second bracket for rotatably mounting the clutch, and the frame is slidably provided with a sliding seat for fixing the first bracket and the second bracket.

[0016] The beneficial effects are as follows: The sliding seat integrates the winch and the clutch on the frame. When disassembling or installing the flywheel assembly or performing maintenance, the sliding of the sliding seat on the frame can be driven to achieve the integrated sliding of the winch and the clutch, thereby avoiding the rotating shaft or increasing the operating space.

[0017] Preferably, as an improvement, the energy storage part includes a plurality of flywheel assemblies coaxially arranged on the flywheel shaft. The flywheel assembly includes a base wheel coaxially arranged on the flywheel shaft and a plurality of sliding wheels coaxially and slidably arranged on the flywheel shaft. The frame is also slidably provided with a support part. The plurality of sliding wheels are detachably connected to both the base wheel and the support part, and the support part is used to suspend the sliding wheels.

[0018] The beneficial effects are as follows: The support part is used to suspend the sliding wheels, thereby reducing the direct contact between the sliding wheels and the flywheel shaft, reducing friction and wear, and improving the running stability of the flywheel assembly. In addition, the slidable setting of the sliding wheels helps to maintain concentricity during high-speed rotation, reducing vibration and shaft runout, thereby enhancing the smoothness of the overall system.

[0019] Preferably, as an improvement, the flywheel assembly further includes a conical surface disk fixed to the flywheel shaft. A shrink fit sleeve is connected between the base wheel and the flywheel shaft. The shrink fit sleeve is used to fix the base wheel to the flywheel shaft and abut against the end of the conical surface disk. The diameter of the larger end of the outer circle of the conical surface disk is equal to the tangent diameter of the inner circle of the sliding wheel.

[0020] The beneficial effects are as follows: The shrink fit sleeve generates sufficient frictional force through the tight fit between the inner circle of the base wheel and the flywheel shaft, thereby realizing the coaxial connection between the base wheel and the flywheel shaft. This design avoids the weakening problem of the keyway on the shaft or the wheel in the key connection, and improves the overall assembly accuracy.

[0021] Preferably, as an improvement, the support part includes a slide rail fixed to the frame and a support frame slidably connected to the slide rail. The support frame and the sliding wheel are detachably connected by bolts. A positioning bolt for abutting against the frame is connected to the bottom end of the support frame. Description of the Drawings

[0022] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 is Figure 1 a partial structural schematic diagram of the connection between the support part and the sliding wheel at A in Figure 3 is a schematic diagram of the sectional structure of the energy storage part and the internal structure of the clutch in an embodiment of the present invention; Figure 4 is Figure 3 a partial structural schematic diagram of the installation of the base wheel and the sliding wheel on the flywheel shaft at B in Figure 5 is an exploded structural schematic diagram of the clutch; Figure 6 For Figure 5 Internal structure schematic diagram of the clutch in the figure. Specific implementation mode

[0023] The following is a further detailed description through specific implementation modes: frame 1, motor 11, rotating shaft 2, flywheel shaft 21, spline shaft 22, brake disc 221, energy storage part 3, base wheel 31, expansion sleeve 311, sliding wheel 32, conical disc 33, support part 4, slide rail 41, support frame 42, positioning bolt 43, sliding seat 5, first bracket 51, winch 511, second bracket 52, clutch 6, hydraulic cylinder 61, adapter 611, piston 612, drum 62, tooth disc 621, friction plate 6211, first return rod 63, second return rod 64.

[0024] Embodiment The embodiment is basically as shown in the appendix Figures 1-6 shown, such as Figures 1-3 shown, a kind of mobile rapid deployment high-acceleration system, including a frame 1 located at the bottom, a variable-frequency motor 11 is fixedly installed at the top of the frame 1, the frame 1 is provided with a frequency converter electrically connected to the variable-frequency motor 11, the speed of the variable-frequency motor 11 is adjusted through the frequency converter, a flywheel shaft 21 is rotatably installed on one side of the output end of the variable-frequency motor 11 at the top of the frame 1, the flywheel shaft 21 is coaxially arranged with the variable-frequency motor 11, bearing seats are fixedly welded at both ends of the flywheel shaft 21 on the top of the frame 1, both ends of the flywheel shaft 21 are rotatably installed on the frame 1 through the bearing seats, and the flywheel shaft 21 and the output shaft of the variable-frequency motor 11 are fixedly connected through a coupling.

[0025] As Figures 2-4 shown, an energy storage part 3 is arranged on the flywheel shaft 21, the energy storage part 3 includes a plurality of flywheel components, the flywheel components include a conical disc 33 fixedly welded coaxially to the flywheel shaft 21, a base wheel 31 fixedly installed on the flywheel shaft 21, the inner diameter of the inner ring of the base wheel 31 is larger than the inner diameter of the flywheel shaft 21, the inner diameter of the inner ring of the base wheel 31 is smaller than the outer diameter of the larger end of the conical disc 33, an expansion sleeve 311 is sleeved between the inner ring of the base wheel 31 and the flywheel shaft 21, the expansion sleeve 311 generates a clamping force between the inner ring of the base wheel 31 and the flywheel shaft 21 through high-strength tension bolts, so as to realize the stable connection between the base wheel 31 and the flywheel shaft 21. This connection method can effectively transmit torque and ensure the stability of the connection by relying on pressure and friction when bearing load. During installation, the base wheel 31 is fixedly installed on the flywheel shaft 21 through the expansion sleeve 311 and abuts against the end face of the larger end of the conical disc 33. The flywheel components also include a plurality of sliding wheels 32 slidably connected to the frame 1 along the axial direction of the flywheel shaft 21, and the inner diameter of the inner ring of the sliding wheels 32 is the same as the outer diameter of the larger end of the conical disc 33.

[0026] An opening for the rotation of the base wheel 31 and the sliding wheel 32 is provided directly below the flywheel shaft 21 and the energy storage part 3 on the frame 1. On both sides of the opening of the frame 1, there are support parts 4. The support part 4 includes slide rails 41 fixedly welded to both sides of the frame 1 at the opening. The slide rails 41 are arranged along the axial direction of the flywheel shaft 21. The slide rails 41 on both sides of the frame 1 are symmetrically arranged. A support frame 42 is slidably connected to the slide rails 41. On the side of the top end of the support frame 42 close to the flywheel shaft 21, there is a connecting plate fixedly welded. A plurality of sliding wheels 32 and the connecting plates of the support frame 42 are respectively provided with corresponding connecting holes. The support frame 42 and the sliding wheels 32 are fixedly connected by bolts at the connecting holes, so as to fix the sliding wheels 32 on the support frames 42 on both sides. Slide the support frame 42 to make the sliding wheels 32 slide in the direction away from the base wheel 31 of the conical surface disc 33. At this time, the inner ring of the sliding wheel 32 does not contact the conical surface of the conical surface disc 33, so that the sliding wheels 32 are suspended and fixed on the frame 1.

[0027] As Figures 2-4 shown, the diameters of a plurality of sliding wheels 32 are not the same. Corresponding fixing holes are provided between a plurality of sliding wheels 32 and the base wheel 31. The base wheel 31 is also fixedly connected to the flywheel by bolts. Thus, sliding wheels 32 with corresponding masses to the load can be fixed on the base wheel 31 according to different sizes of loads. When the variable-frequency motor 11 accelerates and rotates, the high rotational inertia characteristic of the flywheel assembly enables it to quickly respond and store energy, thereby reducing the instantaneous power demand of the variable-frequency motor 11. Finally, the variable-frequency motor 11 quickly increases the rotational speed of the flywheel shaft 21 to a high-speed state. A plurality of positioning parts are fixedly arranged on one side of the frame 1 where the slide rails 41 are located. The bottom end of the support is connected with a positioning bolt 43 corresponding to the positioning part. The support frame 42 is fixed to the frame 1 through the connection of the positioning bolt 43 and the positioning part.

[0028] On both sides of the top end of the frame 1, symmetrically arranged chutes are provided on both sides of the flywheel shaft 21 away from the variable-frequency motor 11. The top end of the frame 1 is horizontally slidably connected with a sliding seat 5 through the chutes on both sides. A first support 51 and a second support 52 are fixedly welded on the sliding seat 5. Both sides of the first support 51 and the second support 52 are symmetrically welded to the sliding seat 5. A winch 511 is rotatably connected to the top end of the first support 51. The winch 511 is used for winding a flexible member acting on the load. A clutch 6 is installed at the top end of the second support 52. The clutch 6 includes a spline shaft 22. The clutch 6 includes an inner cylinder and an outer cylinder. The inner cylinder of the clutch 6 is connected to the spline shaft 22. The outer cylinder of the clutch 6 is connected to the winch 511. The spline shaft 22 is coaxially installed with the flywheel shaft 21. Bearing seats are also welded and fixed on both sides of the sliding seat 5. Both ends of the spline shaft 22 are rotatably installed on the second support 52 through the bearing seats. One end of the spline shaft 22 close to the flywheel shaft 21 is also fixedly connected to the flywheel shaft 21 through a coupling. The flywheel shaft 21 and the spline shaft 22 together form a rotating shaft 2.

[0029] As Figures 5-6As shown, the clutch 6 includes a hydraulic cylinder 61 fixedly installed at the end of the spline shaft 22 away from the flywheel shaft 21. The hydraulic cylinder 61 is coaxially connected to the spline shaft 22. It also includes a drum 62 rotatably connected to one end of the spline shaft 22 close to the flywheel shaft 21. The drum 62 is arranged coaxially with the spline shaft 22. The hydraulic cylinder 61 and the drum 62 form the housing of the clutch 6. At the inner cavity of the housing where the spline shaft 22 is located, a number of brake discs 221 are connected by splines of the spline shaft 22. In the inner cavity of the clutch 6, a number of toothed discs 621 are arranged at intervals with the brake discs 221. The outer diameter of the outer circle of the toothed disc 621 is larger than the outer diameter of the outer circle of the brake disc 221. On both sides of the toothed disc 621, a number of grooves are symmetrically opened. A number of pairs of grooves are arranged centrosymmetrically. Friction plates 6211 are fixedly installed in the grooves. A number of teeth are opened on the outer circle of the toothed disc 621. A number of tooth grooves corresponding to the outer teeth of the toothed disc 621 are opened on the inner wall of the drum 62. A number of tooth grooves axially span the inner wall of the drum 62. During installation, a number of toothed discs 621 are engaged with the tooth grooves of the drum 62. The toothed disc 621 and the brake disc 221 are arranged adjacent to each other. Among them, the toothed disc 621 and the drum 62 form the outer cylinder of the clutch 6, and the brake disc 221 and the hydraulic cylinder 61 form the inner cylinder of the clutch 6.

[0030] A union 611 is fixedly connected to the end of the hydraulic cylinder 61. A number of hydraulic oil circuits are opened inside the hydraulic cylinder 61. A number of pistons 612 are slidably arranged along the axial direction of the spline shaft 22 in the hydraulic cylinder 61. During installation and driving, the union 611 is connected to an external hydraulic oil circuit. The external hydraulic oil circuit drives the piston 612 to abut against the toothed disc 621 through hydraulic oil. The toothed disc 621 drives the friction plate 6211 to abut against the brake disc 221. The brake disc 221 and the toothed disc 621 abut against each other in sequence. Thus, the friction plates 6211 on the toothed disc 621 abut against the adjacent brake discs 221 on both sides. At this time, the frictional force increases. When the spline shaft 22 drives the brake disc 221 to rotate, the friction plate 6211 also drives the toothed disc 621 to rotate through the frictional force. Thus, the toothed disc 621 drives the drum 62 to rotate. A number of fixing plates are fixedly welded between the outer circle of the drum 62 and the inner circle of the winch 511. Thus, the outer cylinder of the clutch 6 is fixedly connected to the winch 511.

[0031] There are a number of first reset rods 63 and second reset rods 64 fixedly connected axially along the spline shaft 22 between the inner cavity hydraulic cylinder 61 and the drum 62 of the clutch 6. The first reset rods 63 and the second reset rods 64 are both arranged parallel to the spline shaft 22. A number of first reset rods 63 sequentially pass through a number of brake discs 221, and a number of second reset rods 64 sequentially pass through a number of gear discs 621. First reset springs are connected between each of the first reset rods 63 and the a number of brake discs 221 penetrated thereby, and second reset springs are connected between each of the second reset rods 64 and the a number of gear discs 621 penetrated thereby. The first reset rods 63, the first reset springs, the second reset rods 64, and the second reset springs together form a reset assembly. After the hydraulic cylinder 61 stops pushing the gear disc 621, the first reset spring and the second reset spring respectively drive the brake disc 221 and the gear disc 621 to reset, so that the inner cylinder and the outer cylinder are disconnected.

[0032] The above are only embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners and the like described in the specification can be used to interpret the content of the claims.

Claims

1. A large-load and high-acceleration device based on a friction method, characterized in that: It includes a frame. The frame is provided with a rotating member for connecting a load, and is also provided with a variable-frequency motor. The rotating member is rotatably arranged coaxially with the output shaft of the variable-frequency motor. The frame is rotatably provided with a rotating shaft, and the output end of the variable-frequency motor is coaxially connected to the rotating shaft. The rotating shaft is provided with an energy storage part. The variable-frequency motor drives the rotating member to rotate through the rotating shaft. A linkage is arranged between the rotating member and the rotating shaft. The linkage includes a first friction member and a second friction member that are relatively rotatably arranged. The first friction member is connected to the rotating shaft, and the second friction member is connected to the rotating member. The linkage is provided with a driving structure for connecting or disconnecting the power transmission between the first friction member and the second friction member.

2. The large-load high-acceleration device based on the friction method according to claim 1, characterized in that: The first friction member is set as a brake disc. The brake disc is coaxially and slidably connected to the rotating shaft. The second friction member is set as a gear disc. The gear disc is coaxially and slidably connected to the rotating member. The movement track of the driving structure intersects with the gear disc, and the driving structure is used to press the gear disc against the brake disc.

3. The large-load high-acceleration device based on the friction method according to claim 2, characterized in that: The linkage is set as a clutch. The rotating shaft includes a flywheel shaft for connecting the energy storage part and a spline shaft for connecting the clutch. Both between the flywheel shaft and the output shaft of the variable-frequency motor and between the flywheel shaft and the spline shaft are coaxially connected through couplings.

4. The large-load high-acceleration device based on the friction method according to claim 3, characterized in that: The brake disc is coaxially and slidably connected to the spline shaft. The clutch includes a drum coaxially and rotatably connected to the spline shaft. The drum is fixedly connected to the rotating member. Tooth grooves corresponding to the external teeth of the gear disc are opened in the inner circle of the drum. The gear disc is coaxially and slidably connected to the drum through the tooth grooves.

5. The large-load high-acceleration device based on the friction method according to claim 4, wherein: The driving structure includes a hydraulic cylinder coaxially and fixedly connected to the end of the spline shaft, a swivel joint connected to the hydraulic cylinder, and several pistons that are coaxially and slidably connected to the spline shaft in the hydraulic cylinder. The sliding path of the pistons intersects with the gear disc.

6. The large-load high-acceleration device based on the friction method according to claim 5, wherein: Reset components are arranged between both the brake disc and the gear disc and the clutch.

7. The high-load and high-acceleration device based on friction according to claim 6, characterized in that: The rotating member is set as a winch for winding a flexible member acting on the load. The frame is provided with a first bracket for rotatably mounting the winch, and the frame is provided with a second bracket for rotatably mounting the clutch. The frame is slidably provided with a sliding seat for fixing the first bracket and the second bracket.

8. The large-load high-acceleration device based on the friction method according to claim 3, wherein: The energy storage part includes several flywheel assemblies coaxially arranged on the flywheel shaft. Each flywheel assembly includes a base wheel coaxially arranged on the flywheel shaft and several sliding wheels coaxially and slidably arranged on the flywheel shaft. The frame is also slidably provided with a support part. The several sliding wheels are detachably connected to both the base wheel and the support part, and the support part is used to suspend the sliding wheels.

9. The large-load high-acceleration device based on the friction method according to claim 8, wherein: The flywheel assembly also includes a conical surface disc fixed to the flywheel shaft. A shrink disc is connected between the base wheel and the flywheel shaft. The shrink disc is used to fix the base wheel to the flywheel shaft and press against the end of the conical surface disc. The diameter of the larger end of the outer circle of the conical surface disc is tangent to and equal to the inner circle diameter of the sliding wheel.

10. The large-load high-acceleration device based on the friction method according to claim 9, characterized in that: The support part includes a slide rail fixed to the frame and a support frame slidably connected to the slide rail. The support frame is detachably connected to the sliding wheel through a bolt. A positioning bolt for pressing against the frame is connected to the bottom end of the support frame.

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