Initial speed increasing device for hydraulic oil cylinder

Abstract

The invention belongs to the technical field of hydraulic oil cylinders, and particularly relates to a hydraulic oil cylinder initial speed increasing device which comprises an oil cylinder shell, a backflow hole and an oil inlet hole are formed in the upper portion and the lower portion of one side of the oil cylinder shell, a piston plate is slidably installed in the oil cylinder shell, a piston rod is connected to the side wall of the piston plate, and a connector is connected to the other end of the piston rod. And a speed-increasing auxiliary part is arranged at the bottom in the oil cylinder shell and corresponds to the piston plate. After external oil liquid enters the oil cylinder shell through the oil liquid opening, the piston plate slowly moves upwards, then the hydraulic pressure above the piston plate is reduced, the sliding block is pushed by the elastic assembly to rapidly expand outwards from the groove in the bottom of the piston plate, and then the top inclined face of the sliding block is pushed corresponding to the bottom inclined face of the knocking rod of the top disc; and the height of the knocking rod is rapidly increased to impact the bottom face of the piston plate, the initial speed of upward movement of the piston plate can be increased through the impact force, and the initial speed of the hydraulic oil cylinder can be increased in the low-temperature state.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic cylinders, and in particular to an initial velocity increasing device for a hydraulic cylinder. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines. It consists of a cylinder barrel and cylinder head, a piston and piston rod, a sealing device, a buffer device and an exhaust device.

[0003] At present, there is an existing patent (Announcement No.: CN118167716B) and an initial velocity increasing component based on a hydraulic oil cylinder. This patent uses part of the hydraulic oil to enter and pass through the increasing mechanism, and is collected and stored through the energy storage cylinder in the increasing mechanism. When the piston rod contracts, a certain amount of energy is accumulated through the energy storage cylinder and the progressive spring. When the piston rod extends, the released oil is used to cooperate with channel one, channel two and the butterfly channel to increase the initial velocity of the oil, and the initial driving force of the excitation rod on the sealing piston is increased under the action of the spring release;

[0004] It still increases the initial velocity by increasing the oil pressure. When the hydraulic cylinder starts, under low temperature conditions, the viscosity of the hydraulic oil will increase significantly, and the fluidity of the oil will deteriorate, thereby affecting the movement speed of the hydraulic cylinder. Therefore, the method of increasing the initial velocity by pressurizing the oil is still affected by the flow rate of the low-temperature oil. At the same time, the structure of the above patent will affect the flow of oil in the reciprocating motion of the hydraulic cylinder.

[0005] Therefore, it is necessary to provide a hydraulic cylinder initial velocity increasing device to solve the above technical problems. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a hydraulic cylinder initial velocity increasing device, which is used to solve the problem that under low temperature conditions, the viscosity of the hydraulic oil will increase significantly, the fluidity of the oil will deteriorate, and thus affect the poor acceleration effect of the hydraulic cylinder's movement speed.

[0007] The present invention provides a hydraulic cylinder initial velocity increasing device, comprising: a cylinder shell, a return hole and an oil inlet hole are arranged on one side of the cylinder shell, a piston plate is slidably installed inside the cylinder shell, a piston rod is connected to the side wall of the piston plate, a connecting head is connected to the other end of the piston rod, an increasing speed auxiliary component is arranged at the bottom of the cylinder shell corresponding to the piston plate, and an increasing speed component is installed between the increasing speed auxiliary component and the piston plate;

[0008] The speed increasing auxiliary component comprises a sliding block and an elastic component, all the sliding blocks are distributed in an annular manner, the top surface of the sliding block is an inclined surface inclined toward the outer circle, the two ends of a single elastic component are respectively connected with sliding blocks, and the two groups of sliding blocks are retracted inwards or expanded outwards through the elastic component;

[0009] The outer wall of the top plate of the speed increasing component is slidably fitted to the inner wall of the oil cylinder shell, a knocking rod is slidably embedded in the top wall of the top plate, the knocking rod corresponds to the sliding block one by one, and a ring component is slidably embedded in the bottom wall of the top plate;

[0010] The top of the top plate is provided with a central hole, and the bottom of the piston plate is provided with a groove for accommodating all the sliding blocks that are retracted inwards;

[0011] The piston rod drives the piston plate to separate from the sliding block, and the elastic component pushes the sliding block to expand outward. During the expansion process, the sliding block pushes the bottom of the knocking rod to quickly impact the bottom of the piston plate.

[0012] Preferably, a speed-increasing rubber pad is provided on the inner wall of the cylinder shell corresponding to the annular component, the annular component includes a limiting ring, a ring groove is provided on the side wall of the limiting ring corresponding to the top plate, an outer ring is provided on the side wall of the top plate corresponding to the limiting ring, and the outer ring is slidably engaged with the ring groove.

[0013] Preferably, a knock spring is additionally provided in the annular groove, and the outer ring of the top plate corresponds to the annular groove to engage and squeeze the knock spring.

[0014] Preferably, the sliding blocks are divided into eight groups, the eight groups of sliding blocks are connected by four elastic components, a single elastic component connects two groups of sliding blocks symmetrically, and the eight groups of sliding blocks are correspondingly provided with eight knocking rods, and the bottom surface of the knocking rod is an inclined surface toward the center of the annular component.

[0015] Preferably, a knocking head is connected to the top of the knocking rod, and a hole body on the top plate adapted for the knocking rod is provided with a countersunk groove for accommodating the knocking head.

[0016] Preferably, the elastic component includes a left rod and a right rod, a stepped inner hole is opened on one side of the left rod, the other end of the left rod is connected to a sliding block, a stepped nested column is connected to one side of the right rod, and a pushing spring is arranged between the nested column and the fixed inner hole to drive the two groups of sliding blocks to expand or contract.

[0017] Preferably, a stepped positioning column is provided inside the inner hole of the left rod, and a stepped positioning hole is provided inside the nesting column of the right rod. The positioning column and the positioning hole are slidably nested, and a pushing spring is provided between the positioning column and the positioning hole to drive the two groups of sliding blocks to expand or contract, and a buffer pad adapted to the positioning column is provided inside the positioning hole.

[0018] Compared with the related art, the hydraulic cylinder initial velocity increasing device provided by the present invention has the following advantages:

[0019] Beneficial effects:

[0020] 1. The present invention arranges an increasing speed component and an increasing speed auxiliary component. After the external oil enters the oil cylinder shell through the oil port, the piston plate moves slowly upward, and then the hydraulic pressure above the piston plate is reduced. The sliding block is pushed outward rapidly from the groove at the bottom of the piston plate by the elastic component, and then the top inclined surface of the sliding block is pushed by the bottom inclined surface of the knocking rod of the corresponding top plate, so that the height of the knocking rod rises rapidly to impact the bottom surface of the piston plate. The initial velocity of the piston plate moving upward can be increased by the impact force, which is beneficial to increasing the initial velocity of the hydraulic cylinder under low temperature conditions.

[0021] 2. The arrangement of the elastic component and the annular component of the present invention is that when the piston plate sinks and resets under the drive of the piston rod, the sliding block corresponding to the outward expansion on the bottom surface of the piston plate is pressed down under the action of pressure, so that the sliding block shrinks along the inclined surface in the groove of the piston plate. At the same time, the pushing spring in the elastic component is compressed, and then the nesting column of the right rod continues to penetrate into the inner hole, so that the combined length of the left rod and the right rod shrinks, and all the sliding blocks are gathered in the groove. The downward pressure of the piston plate makes the outer ring of the top plate nested in the annular groove of the limit ring, which is beneficial to the resetting of the speed increasing component and the speed increasing auxiliary component after the piston rod reaches the bottom, and at the same time, it will not affect the flow of oil during the reciprocating process of the oil cylinder.

[0022] 3. The speed increasing component and the speed increasing auxiliary component of the present invention both adopt a mechanical structure. When the hydraulic cylinder initially starts to reciprocate, the mechanical structure will generate a certain amount of heat while doing work, which can effectively help increase the temperature of the oil, which will allow the hydraulic cylinder to reach its optimal state earlier. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The overall external schematic diagram of a hydraulic cylinder of a hydraulic cylinder initial velocity increasing device provided by the present invention;

[0024] Figure 2 An exploded schematic diagram of a piston rod, a speed increasing component and a speed increasing auxiliary component of a hydraulic cylinder initial speed increasing device provided by the present invention;

[0025] Figure 3 A schematic diagram of the interior of a hydraulic cylinder of a hydraulic cylinder initial velocity increasing device provided by the present invention;

[0026] Figure 4 A schematic cross-sectional view of a speed-increasing auxiliary component of a hydraulic cylinder initial speed-increasing device provided by the present invention;

[0027] Figure 5An exploded schematic diagram of a speed increasing component of a hydraulic cylinder initial speed increasing device provided by the present invention;

[0028] Figure 6 An exploded schematic diagram of a speed increasing component of a hydraulic cylinder initial speed increasing device according to a second embodiment of the present invention;

[0029] Figure 7 A schematic cross-sectional view of an elastic component of an initial velocity increasing device of a hydraulic cylinder provided by the present invention;

[0030] Figure 8 An exploded schematic diagram of an elastic component of an initial velocity increasing device of a hydraulic cylinder provided by the present invention;

[0031] Fig. 9 The overall external schematic diagram of the speed increasing component of the hydraulic cylinder initial speed increasing device provided by the present invention;

[0032] Fig.10 An overall schematic diagram of a speed-increasing auxiliary component of a hydraulic cylinder initial speed-increasing device provided by the present invention;

[0033] Fig.11 A schematic top view of a hydraulic cylinder initial velocity increasing device provided by the present invention with an auxiliary speed increasing component in an outwardly deployed state.

[0034] The accompanying drawings are marked as follows: 1. Connecting head; 2. Piston rod; 21. Piston plate; 3. Cylinder shell; 31. Speed ​​increasing component; 311. Top plate; 312. Knocking head; 313. Knocking rod; 314. Middle hole; 315. Ring assembly; 3151. Outer ring; 3152. Limiting ring; 3153. Ring groove; 3154. Knocking spring; 32. Speed ​​increasing auxiliary component; 321. Sliding block; 322. Elastic assembly; 3221. Left rod; 3222. Inner hole; 3223. Positioning column; 3224. Positioning hole; 3225. Right rod; 3226. Nesting column; 3227. Push spring; 4. Reflux hole; 5. Oil inlet hole. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1

[0037] A device for increasing the initial velocity of a hydraulic cylinder comprises: a cylinder shell 3, wherein a return hole 4 and an oil inlet hole 5 are arranged on one side of the cylinder shell 3, and the oil shell is used in conjunction with an oil tank, a safety valve and a hydraulic pump. The hydraulic pump is connected to the oil inlet hole 5 corresponding to the safety valve and the connecting pipe. By starting the hydraulic pump, the oil in the oil tank is sent to the bottom of the piston plate 21 of the hydraulic shell through the oil inlet hole 5, and the oil in the cylinder shell 3 enters the oil tank through the return hole 4. In order to protect the hydraulic pump and the hydraulic cylinder, it is best to add a filter to the pipeline connecting the return hole 4 to the oil tank to filter the particles in the oil.

[0038] A piston plate 21 is slidably installed inside the cylinder shell 3, and a piston rod 2 is connected to the side wall of the piston plate 21. The other end of the piston rod 2 is connected to a connector 1. Driven by a hydraulic pump, the piston plate 21 is pushed by oil to drive the piston rod 2 and the connector 1 to perform linear sliding.

[0039] An acceleration auxiliary component 32 is provided at a position corresponding to the piston plate 21 in the bottom of the oil cylinder shell 3, and an acceleration component 31 is installed between the acceleration auxiliary component 32 and the piston plate 21;

[0040] The speed increasing auxiliary component 32 includes a sliding block 321 and an elastic component 322. All the sliding blocks 321 are distributed in an annular shape, and the shape can refer to a truncated cone. Fig.10 The number of the sliding blocks 321 can be four or eight groups, the top surface of the sliding block 321 is an inclined surface inclined toward the outer circle, and the two ends of the single elastic component 322 are respectively connected to the sliding blocks, and the two groups of sliding blocks 321 are retracted inward or expanded outward through the elastic component 322;

[0041] The top of the top plate 311 is provided with a central hole 314 , and the bottom surface of the piston plate 21 is provided with a groove for accommodating all the sliding blocks 321 that are retracted inwardly. The midpoint of the ring formed by all the inwardly retracted sliding blocks 321 and the midpoint of the central hole 314 of the top plate 311 are on the same vertical line.

[0042] Taking eight sets of sliding blocks 321 as a reference, four elastic components 322 are required. In the absence of external force, a single elastic component will expand two sets of sliding blocks 321 outward, and four elastic components 322 will simultaneously push eight sets of sliding blocks 321 outward. Fig.11 The heights of the four elastic components 322 are all different, but the midpoints of the four elastic components 322 are located on the same vertical line. In order to ensure the fixedness of the moving trajectory of the sliding block 321, an adaptive guide groove can be set at the bottom of the cylinder shell 3 corresponding to the sliding block 321. The guide groove can form a linear restriction on the inward contraction or outward expansion trajectory of the sliding block 321, so that the moving trajectory of the sliding block 321 is more stable.

[0043] The outer wall of the top plate 311 of the speed increasing assembly slides in contact with the inner wall of the oil cylinder shell 3, a knocking rod 313 is slidably embedded in the top wall of the top plate 311, a through knocking hole is provided on the top plate 311 corresponding to the knocking rod 313, the knocking rod 313 corresponds to the sliding block 321 one by one, the knocking rod 313 slides through the knocking hole of the top plate 311, and a ring assembly 315 is slidably embedded in the bottom wall of the top plate 311;

[0044] The inner wall of the oil cylinder shell 3 is provided with a speed increasing rubber pad 33 corresponding to the annular component 315. When the resistance increasing component is under pressure, the annular component 315 is pressed against the speed increasing rubber pad 33 to buffer the pressure on the annular component 315. The annular component 315 includes a limiting ring 3152. The limiting ring 3152 is provided with an annular groove 3153 on the side wall corresponding to the top plate 311. The top plate 311 is provided with an outer ring 3151 on the side wall corresponding to the limiting ring 3152. The outer ring 3151 is slidably engaged with the annular groove 3153.

[0045] The outer ring 3151 of the top plate 311 is engaged with the ring groove 3153 of the limit ring 3152. During the entire speed-increasing action, the top plate 311 and the limit ring 3152 move up and down synchronously with the knock rod 313 and the piston plate 21. In order to ensure the stability of the structure of the limit ring 3152 and the top plate 311, a stroke limiting structure is added between the outer ring 3151 and the limit ring 3152, that is, the height of the outer ring 3151 away from the limit ring 3152 is within a range. The stroke limiting structure is specifically as follows: a sliding rod with a head can be added through the bottom of the top plate 311, and a sliding cylinder adapted to the sliding rod is added to the inner wall of the limit ring 3152. The sliding rod passes through the sliding cylinder from top to bottom, and a cover body with the sliding rod head is provided on the top of the sliding cylinder.

[0046] The knocking rod 313 is connected to a knocking head 312 at the top, and a hole on the top plate 311 adapted for the knocking rod 313 is provided with a countersunk groove for receiving the knocking head 312. The knocking head 312 and the countersunk groove make the top surface of the top plate 311 free of convex structures, so that the knocking head 312 can expand the knocking area;

[0047] There are eight groups of sliding blocks 321, and the eight groups of sliding blocks 321 are connected by four elastic components 322. A single elastic component 322 connects two groups of sliding blocks 321 symmetrically. The eight groups of sliding blocks 321 are correspondingly provided with eight knocking rods 313, and the bottom surface of the knocking rod 313 is an inclined surface toward the center of the annular component 315.

[0048] In order to keep the inclined surface of the knocking rod 313 facing the center of the annular component 315 stable, a raised strip structure can be set on the side wall of the knocking rod 313, and a recessed strip structure can be opened in the knocking hole. The raised strip structure of the knocking rod 313 is nested with the recessed strip structure of the knocking hole, so that the inclined surface at the bottom of the knocking rod 313 remains inclined toward the center of the annular component 315.

[0049] The elastic component 322 includes a left rod 3221 and a right rod 3225. A stepped inner hole 3222 is provided on one side of the left rod 3221, that is, the inner hole 3222 has two inner diameters, which are arranged from large to small. The other end of the left rod 3221 is connected to the sliding block 321. A stepped nested column 3226 is connected to one side of the right rod 3225, that is, the nested column 3226 has two outer diameters, which are arranged from large to small. The two inner diameters of the inner hole 3222 are aligned with the two outer diameters of the nested column 3226. The diameters are adapted to each other, and a push spring 3227 is provided between the nesting column 3226 and the fixed inner hole 3222 for driving the two groups of sliding blocks 321 to expand or contract, that is, the push spring 3227 is nested on the cylindrical component with a small inner diameter of the nesting column 3226, and is squeezed on the hole wall with a large inner diameter of the corresponding inner hole 3222. In the absence of external force, the push spring 3227 is expanded to open the left rod 3221 and the right rod 3225, thereby completing the outward expansion state of the two groups of sliding blocks 321;

[0050] When the movable plate is pressed down to shrink the speed-increasing auxiliary component 32, the sliding block 321 corresponding to the outwardly expanded sliding block 321 on the bottom surface of the piston plate 21 is pressed down, so that the sliding block 321 shrinks in the groove along the inclined surface facing the piston plate 21. When the two sets of sliding blocks shrink toward the center, the pushing spring 3227 in the elastic component 322 is compressed, and then the nesting column 3226 of the right rod 3225 continues to penetrate into the inner hole 3222, so that the combined length of the left rod 3221 and the right rod 3225 shrinks, and finally all the sliding blocks 321 are retracted in the groove;

[0051] A positioning column 3223 is provided inside the inner hole 3222 of the left rod 3221, and a positioning hole 3224 is provided inside the nesting column 3226 of the right rod 3225. The positioning column 3223 and the positioning hole 3224 are slidably nested, and a buffer pad adapted to the positioning column 3223 is provided inside the positioning hole 3224;

[0052] The positioning column 3223 of the left rod 3221 is slidably nested in the positioning hole 3224 of the right rod 3225 to ensure that the moving trajectory of the sliding block 321 is linear and has a guiding function for the moving direction of the sliding block 321. The buffer pad can reduce mechanical damage to the hydraulic cylinder during reciprocating motion.

[0053] The piston rod 2 drives the piston plate 21 to separate from the sliding block 321, and the elastic component 322 pushes the sliding block 321 to expand outward. During the expansion process, the sliding block 321 pushes the bottom of the knocking rod 313 to quickly hit the bottom of the piston plate 21;

[0054] After the external oil enters the cylinder shell 3 through the oil port, the piston plate 21 moves slowly upward, and then the hydraulic pressure above the piston plate 21 is reduced. The sliding block 321 is quickly expanded outward by the groove at the bottom of the piston plate 21 under the push of the elastic component 322, and then the top inclined surface of the sliding block 321 pushes the bottom inclined surface of the knocking rod 313 corresponding to the top plate 311, so that the height of the knocking rod 313 rises rapidly to form an impact on the bottom surface of the piston plate 21. The impact force can increase the initial upward velocity of the piston plate 21, and the initial velocity of the hydraulic cylinder can be accelerated under low temperature conditions.

[0055] Specific embodiment 2 is different from specific embodiment 1 in that: a knock spring 3154 is additionally provided in the annular groove 3153, and the outer ring 3151 of the top plate 311 is engaged with the annular groove 3153 to squeeze the knock spring 3154;

[0056] The upper and lower ends of the knocking spring 3154 can be fixed corresponding to the bottom of the outer ring 3151 and the bottom of the ring groove 3153 respectively, so that the knocking spring 3154 can form a stroke limiting structure similar to the specific embodiment 1, but the knocking spring 3154 increases the elasticity of the top plate 311 in the acceleration action. After the knocking head 312 of the knocking rod 313 completes the knocking with the help of the acceleration auxiliary component, the knocking spring 3154 is synchronously expanded with the expansion of the sliding block 321 and the disengagement of the piston plate 21, so that the top plate 311 also knocks on the bottom of the piston plate 21 under the action of the knocking spring 3154.

[0057] Further explanation is given on how heat is generated by mechanical work to help increase the temperature of the oil and bring the hydraulic cylinder to its optimal state earlier;

[0058] During the reciprocating extrusion process of the spring, the friction between its molecules will cause energy dissipation, which is manifested as heat generation;

[0059] At the same time, the sliding block 321 always moves along the line during the reciprocating motion of the oil cylinder, and the inclined surface of the knocking rod 313 and the inclined surface of the sliding block 321 slide and rub against each other. The friction of the above two actions will also generate heat.

[0060] The striking of the striking head 312 of the striking rod 313 against the bottom of the piston plate 21 also generates heat;

[0061] The speed-increasing action formed by the entire speed-increasing component 31 and the auxiliary speed-increasing component 31 will generate some heat, and because both are concentrated in the oil inlet hole 5, the oil passes through both when entering the hydraulic cylinder and takes away the heat, which can play a role in increasing the oil temperature.

[0062] Specific working principle;

[0063] The oil shell is used with an oil tank, a safety valve and a hydraulic pump. The hydraulic pump is connected to the oil inlet hole 5 corresponding to the safety valve and the connecting pipe. By starting the hydraulic pump, the oil in the oil tank is sent to the bottom of the piston plate 21 of the hydraulic shell through the oil inlet hole 5, and the oil in the cylinder shell 3 enters the oil tank through the reflux hole 4;

[0064] The oil enters through the oil inlet hole 5 and then lifts the height of the piston plate 21. The piston plate 21 pushes the piston rod 2 and the connecting head 1 to rise. The sliding block 321 is pushed outward by the groove at the bottom of the piston plate 21 under the push of the elastic component 322. The pushing spring 3227 of the elastic component 322 is expanded to open the left rod 3221 and the right rod 3225. Then, the top inclined surfaces of the two groups of sliding blocks 321 push the bottom inclined surfaces of the two groups of knocking rods 313 of the top plate 311, so that the height of the knocking rod 313 rises rapidly and the knocking head 312 impacts the bottom surface of the piston plate 21. The impact force can increase the initial speed of the piston plate 21 upward. Similarly, the knocking rods 313 corresponding to the other sliding blocks 321 perform the same action.

[0065] The outer ring 3151 of the top plate 311 is engaged with the annular groove 3153 of the limiting ring 3152. During the whole speed-increasing process, the top plate 311 and the limiting ring 3152 move up and down synchronously with the knocking rod 313 and the piston plate 21. The upper and lower ends of the knocking spring 3154 can be respectively fixed to the bottom of the outer ring 3151 and the bottom of the annular groove 3153. After the knocking head 312 of the knocking rod 313 completes the knocking with the help of the speed-increasing auxiliary component, the knocking spring 3154 is synchronously expanded with the expansion of the sliding block 321 and the disengagement of the piston plate 21, so that the top plate 311 also forms a knocking action on the bottom of the piston plate 21 under the action of the knocking spring 3154.

[0066] When the hydraulic pump reverses to draw oil from the oil inlet hole 5, that is, the piston plate 21 is reset to make the piston rod 2 and the connector 1 descend, and the sliding block 321 corresponding to the outward expansion on the bottom surface of the piston plate 21 is pressed down, so that the sliding block 321 shrinks in the groove along the inclined surface of the piston plate 21. When the two groups of slides shrink toward the center, the push spring 3227 in the elastic component 322 is compressed, and then the nesting column 3226 of the right rod 3225 continues to penetrate into the inner hole 3222, so that the combined length of the left rod 3221 and the right rod 3225 shrinks, and finally all the sliding blocks 321 are retracted in the groove. In this process, the positioning column 3223 of the left rod 3221 slides and nests corresponding to the positioning hole 3224 of the right rod 3225 to ensure that the movement trajectory of the sliding block 321 is linear.

[0067] The piston rod 2 of the hydraulic cylinder is started in a low temperature state, and the piston plate 21 reciprocates up and down in the cylinder shell 3 and can repeatedly accelerate the movement through the speed increasing component 31 and the speed increasing auxiliary component 32.

[0068] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hydraulic cylinder initial velocity increasing device, comprising: A cylinder shell (3), wherein a return hole (4) and an oil inlet hole (5) are arranged on one side of the cylinder shell (3) at the top and the bottom, a piston plate (21) is slidably mounted inside the cylinder shell (3), a piston rod (2) is connected to the side wall of the piston plate (21), and a connector (1) is connected to the other end of the piston rod (2), characterized in that an auxiliary speed-increasing component (32) is arranged at a position corresponding to the piston plate (21) at the bottom of the cylinder shell (3), and an auxiliary speed-increasing component (31) is installed between the auxiliary speed-increasing component (32) and the piston plate (21); The speed increasing auxiliary component (32) comprises a sliding block (321) and an elastic component (322), all the sliding blocks (321) are arranged in a ring shape, the top surface of the sliding block (321) is an inclined surface inclined toward the outer circle, the two ends of a single elastic component (322) are respectively connected to the sliding blocks (321), and the two groups of sliding blocks (321) are contracted inwardly or expanded outwardly through the elastic component (322); The outer wall of the top plate (311) of the speed increasing component is slidably fitted to the inner wall of the oil cylinder shell (3); a knocking rod (313) is slidably embedded in the top wall of the top plate (311); the knocking rod (313) corresponds to the sliding block (321) one by one; and a ring component (315) is slidably embedded in the bottom wall of the top plate (311); The top of the top plate (311) is provided with a central hole (314), and the bottom surface of the piston plate (21) is provided with a groove for accommodating all the sliding blocks (321) that are retracted inwardly; The piston rod (2) drives the piston plate (21) to separate from the sliding block (321), and the elastic component (322) pushes the sliding block (321) to expand outward. During the expansion process, the sliding block (321) pushes the bottom of the knocking rod (313) to quickly impact the bottom of the piston plate (21).

2. The hydraulic cylinder initial velocity increasing device according to claim 1, characterized in that: A speed-increasing rubber pad (33) is arranged at the inner wall of the oil cylinder shell (3) corresponding to the annular component (315); the annular component (315) comprises a limiting ring (3152); a ring groove (3153) is provided on the side wall of the limiting ring (3152) corresponding to the top plate (311); an outer ring (3151) is arranged on the side wall of the top plate (311) corresponding to the limiting ring (3152); and the outer ring (3151) is slidably engaged with the ring groove (3153).

3. The hydraulic cylinder initial velocity increasing device according to claim 2, characterized in that: A knock spring (3154) is additionally provided in the annular groove (3153), and the outer ring (3151) of the top plate (311) corresponds to the annular groove (3153) to engage and squeeze the knock spring (3154).

4. The hydraulic cylinder initial velocity increasing device according to claim 1, characterized in that: The sliding blocks (321) are in eight groups, and the eight groups of sliding blocks (321) are connected by four elastic components (322). A single elastic component (322) connects two groups of sliding blocks (321) symmetrically. The eight groups of sliding blocks (321) are correspondingly provided with eight knocking rods (313), and the bottom surface of the knocking rod (313) is an inclined surface toward the center of the annular component (315).

5. The hydraulic cylinder initial velocity increasing device according to claim 1, characterized in that: The top of the knocking rod (313) is connected to a knocking head (312), and a hole on the top plate (311) adapted for the knocking rod (313) is provided with a countersunk groove for accommodating the knocking head (312).

6. The hydraulic cylinder initial velocity increasing device according to claim 4, characterized in that: The elastic component (322) includes a left rod (3221) and a right rod (3225), wherein a stepped inner hole (3222) is provided on one side of the left rod (3221), and the other end of the left rod (3221) is connected to the sliding block (321), and a stepped nesting column (3226) is connected to one side of the right rod (3225), and a pushing spring (3227) is provided between the nesting column (3226) and the fixed inner hole (3222) for driving the two groups of sliding blocks (321) to expand or contract.

7. The hydraulic cylinder initial velocity increasing device according to claim 6, characterized in that: A stepped positioning column (3223) is provided inside the inner hole (3222) of the left rod (3221), and a stepped positioning hole (3224) is provided inside the nesting column (3226) of the right rod (3225). The positioning column (3223) and the positioning hole (3224) are slidably nested, and a pushing spring (3227) is provided between the positioning column (3223) and the positioning hole (3224) for driving the two groups of sliding blocks (321) to expand or contract. A buffer pad adapted to the positioning column (3223) is provided inside the positioning hole (3224).

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