Hydraulic cylinder initial speed increasing device

Abstract

This invention belongs to the field of hydraulic cylinder technology, specifically a hydraulic cylinder initial velocity increasing device, comprising: a cylinder housing, with a return hole and an oil inlet hole arranged vertically on one side of the cylinder housing; a piston plate slidably mounted inside the cylinder housing; a piston rod connected to the side wall of the piston plate; and a connector connected to the other end of the piston rod; and an increasing speed auxiliary component located at the bottom of the cylinder housing corresponding to the piston plate. In this invention, after external oil enters the cylinder housing through the oil inlet, the piston plate slowly moves upward, thereby reducing the hydraulic pressure above the piston plate. Under the push of the elastic component, the sliding block rapidly expands outward from the groove at the bottom of the piston plate. The inclined surface of the top of the sliding block then pushes against the inclined surface of the bottom of the striking rod on the top plate, causing the striking rod to rise rapidly and impact the bottom surface of the piston plate. This impact force increases the initial velocity of the piston plate, which is beneficial for increasing the initial velocity of the hydraulic cylinder at low temperatures.

Description

Technical Field

[0001] This invention relates to the field of hydraulic cylinder technology, and in particular to a hydraulic cylinder initial velocity increaser. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device, has no transmission backlash, and provides smooth movement. 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] The existing patent (publication number: CN118167716B) and a hydraulic cylinder-based initial velocity acceleration component utilize a portion of the hydraulic oil to enter the acceleration mechanism and be collected and stored through an energy storage cylinder in the acceleration mechanism. When the piston rod retracts, a certain amount of energy is accumulated through the energy storage cylinder and the progressive spring. When the piston rod extends, the released oil, in conjunction with channel one, channel two and the butterfly channel, increases the initial velocity of the oil and, under the action of the spring release, increases the initial pushing force of the excitation rod on the sealed piston.

[0004] It still increases the initial velocity by increasing the oil pressure. When the hydraulic cylinder starts, the viscosity of the hydraulic oil will increase significantly under low temperature conditions, and the oil flow will become worse, which will affect the action speed of the hydraulic cylinder. Therefore, the method of increasing the initial velocity by pressurizing the oil is still affected by the low temperature oil flow rate. At the same time, the structure of the above-mentioned patent will affect the flow of oil during the reciprocating action of the hydraulic cylinder.

[0005] Therefore, it is necessary to provide a hydraulic cylinder initial velocity increaser to solve the above-mentioned technical problems. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a hydraulic cylinder initial speed increase device, which solves the problem that under low-temperature conditions, the viscosity of hydraulic oil increases significantly, the fluidity of the oil deteriorates, and consequently the hydraulic cylinder's action speed increase effect is poor.

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

[0008] The speed-increasing auxiliary component includes sliding blocks and elastic components. All the sliding blocks are arranged in a ring. The top surface of the sliding block is an inclined surface that slopes outward. Each elastic component has sliding blocks connected to both ends. The two sets of sliding blocks can contract inward or expand outward through the elastic components.

[0009] The outer wall of the top plate of the speed-increasing component slides against the inner wall of the cylinder housing, and a striking rod is slidably nested in the top wall of the top plate. The striking rod corresponds one-to-one with the sliding block, and an annular component is slidably nested in the bottom wall of the top plate.

[0010] The top plate has a central hole, and the bottom surface of the piston plate has a groove to accommodate all the inwardly retracting sliding blocks;

[0011] The piston rod drives the piston plate to disengage from the sliding block, the elastic component pushes the sliding block to unfold outward, and during the unfolding process, the sliding block pushes the bottom of the striking rod to quickly strike the bottom of the piston plate.

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

[0013] Preferably, a striking spring is added inside the annular groove, and the outer ring of the top plate engages with the annular groove to compress the striking spring.

[0014] Preferably, there are eight groups of sliding blocks, and the eight groups of sliding blocks are connected by four elastic components. A single elastic component connects two groups of sliding blocks symmetrically. The eight groups of sliding blocks are respectively provided with eight striking rods, and the bottom surface of the striking rod is inclined towards the center of the annular component.

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

[0016] Preferably, the elastic component includes a left rod and a right rod. The left rod has a stepped inner hole on one side and a sliding block connected to the other end of the left rod. The right rod has a stepped nested column on one side, and a push spring for driving the two sets of sliding blocks to unfold or retract is provided between the nested column and the fixed inner hole.

[0017] Preferably, the inner hole of the left rod has a stepped positioning post, and the nested post of the right rod has a stepped positioning hole. The positioning post and the positioning hole are slidably nested, and a push spring for driving the two sets of sliding blocks to unfold or retract is provided between the positioning post and the positioning hole. A buffer pad adapted to the positioning post is provided inside the positioning hole.

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

[0019] Beneficial effects:

[0020] 1. By setting up speed-increasing components and speed-increasing auxiliary components, after the external oil enters the cylinder shell through the oil port, the piston plate moves slowly upward, thereby reducing the hydraulic pressure above the piston plate. Under the push of the elastic component, the sliding block quickly unfolds outward from the groove at the bottom of the piston plate. Then, the inclined surface of the top of the sliding block pushes the inclined surface of the bottom of the striking rod of the top plate, causing the striking rod to rise rapidly and impact the bottom surface of the piston plate. The impact force can increase the initial velocity of the piston plate moving upward, which is beneficial for increasing the initial velocity of the hydraulic cylinder at low temperature.

[0021] 2. The elastic component and annular component of this invention are configured such that when the piston plate sinks and resets under the action of the piston rod, the bottom surface of the piston plate presses down on the corresponding outwardly expanding sliding block, causing the sliding block to contract along the groove of the inclined surface of the piston plate. At the same time, the push spring in the elastic component is compressed, and the nested column of the right rod continues to penetrate deeper into the inner hole, causing the combined length of the left and right rods to contract, gathering all the sliding blocks into the groove. The downward pressing of the piston plate causes the outer ring of the top plate to nest with the annular groove of the limiting ring, which is beneficial for the speed-increasing component and speed-increasing auxiliary component to reset after the piston rod reaches the bottom. At the same time, it does not affect the flow of oil during the reciprocating process of the oil cylinder.

[0022] 3. Both the speed-increasing component and the speed-increasing auxiliary component of this invention adopt mechanical structures. When the hydraulic cylinder is initially started and reciprocating, the mechanical structure generates a certain amount of heat while doing work, which can effectively help raise the temperature of the oil, allowing the hydraulic cylinder to reach its optimal state sooner. Attached Figure Description

[0023] Figure 1 A schematic diagram of the overall external structure of a hydraulic cylinder for a hydraulic cylinder initial velocity increaser device provided by the present invention;

[0024] Figure 2 An exploded view of the piston rod, speed-up component, and speed-up auxiliary component of a hydraulic cylinder initial velocity speed-up device provided by the present invention;

[0025] Figure 3 A schematic diagram of the internal structure of a hydraulic cylinder for providing an initial velocity increase device for a hydraulic cylinder, as provided by the present invention;

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

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

[0028] Figure 6 An exploded view of the speed-increasing component in Embodiment 2 of the hydraulic cylinder initial velocity speed-increasing device provided by the present invention;

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

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

[0031] Figure 9 This invention provides an overall external schematic diagram of the speed-increasing component of a hydraulic cylinder initial velocity speed-increasing device.

[0032] Figure 10 A schematic diagram of the speed-increasing auxiliary component of a hydraulic cylinder initial velocity speed-increasing device provided by the present invention;

[0033] Figure 11 This is a top view of the speed-increasing auxiliary component of a hydraulic cylinder initial velocity speed-increasing device provided by the present invention in its outward-expanded state.

[0034] The attached figures are labeled as follows: 1. Connector; 2. Piston rod; 21. Piston plate; 3. Cylinder housing; 31. Speed-increasing component; 311. Top plate; 312. Striking head; 313. Striking rod; 314. Central hole; 315. Annular assembly; 3151. Outer ring; 3152. Limiting ring; 3153. Annular groove; 3154. Striking spring; 32. Speed-increasing auxiliary component; 321. Sliding block; 322. Elastic assembly; 3221. Left rod; 3222. Inner hole; 3223. Positioning pin; 3224. Positioning hole; 3225. Right rod; 3226. Nested pin; 3227. Push spring; 4. Return hole; 5. Oil inlet hole. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1

[0037] A hydraulic cylinder initial velocity increaser includes: a cylinder housing 3, wherein a return hole 4 and an oil inlet hole 5 are provided on one side of the cylinder housing 3. The cylinder housing 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 through the safety valve and a connecting pipe. By starting the hydraulic pump, the oil in the oil tank is sent to the piston plate 21 below the hydraulic housing through the oil inlet hole 5. The oil in the cylinder housing 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 on the pipe 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 housing 3. A piston rod 2 is connected to the side wall of the piston plate 21. A connector 1 is connected to the other end of the piston rod 2. Driven by the hydraulic pump, the piston plate 21 is pushed by the hydraulic fluid to drive the piston rod 2 and the connector 1 to slide linearly.

[0039] A speed-increasing auxiliary component 32 is provided at the bottom of the cylinder housing 3, corresponding to the piston plate 21, and the speed-increasing auxiliary component 32 and the piston plate 21 are installed together.

[0040] The speed-increasing auxiliary component 32 includes sliding blocks 321 and elastic components 322. All the sliding blocks 321 are arranged in a ring, and their shape can be referred to as a frustum. Figure 10 The number of sliding blocks 321 can be four or eight. The top surface of the sliding block 321 is an inclined surface that slopes outward. Each end of the single elastic component 322 is connected to a sliding block. The two sets of sliding blocks 321 can retract inward or expand outward through the elastic component 322.

[0041] The top plate 311 has a central hole 314 at its top, and the bottom surface of the piston plate 21 has a groove to accommodate all the inwardly retracting sliding blocks 321. The midpoint of the annulus formed by all the inwardly retracting 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 needed. Without external force, a single elastic component unfolds two sets of sliding blocks 321 outwards, and all four elastic components 322 simultaneously push all eight sets of sliding blocks 321 outwards. Figure 11 The heights of the four sets of elastic components 322 are different, but the midpoints of the four sets of elastic components 322 are located on the same vertical line. In order to ensure the stability of the movement trajectory of the sliding block 321, a matching guide groove can be set at the bottom of the cylinder housing 3 corresponding to the sliding block 321. The guide groove can linearly limit the trajectory of the sliding block 321 to retract inward or expand outward, making the movement trajectory of the sliding block 321 more stable.

[0043] The outer wall of the top plate 311 of the speed-increasing component slides against the inner wall of the cylinder housing 3. A striking rod 313 is slidably nested in the top wall of the top plate 311. A through-hole is provided on the top plate 311 corresponding to the striking rod 313. The striking rod 313 corresponds one-to-one with the sliding block 321. The striking rod 313 slides through the striking hole in the top plate 311. A ring component 315 is slidably nested in the bottom wall of the top plate 311.

[0044] A speed-increasing rubber pad 33 is provided on the inner wall of the cylinder housing 3 corresponding to the annular component 315. When the resistance-increasing component is under pressure, the annular component 315 is compressed and squeezes the speed-increasing rubber pad 33, thus buffering the pressure on the annular component 315. The annular component 315 includes a limiting ring 3152. The limiting ring 3152 has an annular groove 3153 on the side wall corresponding to the top plate 311. The top plate 311 has an outer ring 3151 on the side wall corresponding to the limiting ring 3152. The outer ring 3151 slides and engages with the annular groove 3153.

[0045] The outer ring 3151 of the top plate 311 engages with the annular groove 3153 of the limiting ring 3152. During the entire acceleration process, the top plate 311 and the limiting ring 3152 move up and down synchronously with the striking rod 313 and the piston plate 21. In order to ensure the stability of the structure of the limiting ring 3152 and the top plate 311, a stroke limiting structure is added between the outer ring 3151 and the limiting ring 3152. That is, the height of the outer ring 3151 away from the limiting ring 3152 is within a certain range. The stroke limiting structure is specifically: a sliding rod with a head is added to the bottom of the top plate 311, and a sliding cylinder adapted to the sliding rod is added to the inner wall of the limiting ring 3152. The sliding rod passes through the sliding cylinder from top to bottom, and the top of the sliding cylinder has a cover for setting the head of the sliding rod.

[0046] The top of the striking rod 313 is connected to the striking head 312. The hole on the top plate 311 that is adapted to the striking rod 313 is provided with a countersunk groove for receiving the striking head 312. Through the striking head 312 and the countersunk groove, the top surface of the top plate 311 has no protruding structure, and the striking head 312 can expand the striking area.

[0047] The sliding block 321 consists of 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 striking rods 313. The bottom surface of the striking rod 313 is inclined towards the center of the annular component 315.

[0048] To maintain the stable orientation of the inclined surface of the striking rod 313 toward the center of the annular assembly 315, a raised strip structure can be provided on the side wall of the striking rod 313, and a recessed strip structure is provided in the striking hole. The raised strip structure of the striking rod 313 is nested with the recessed strip structure of the striking hole, so that the inclined surface at the bottom of the striking rod 313 remains inclined toward the center of the annular assembly 315.

[0049] The elastic component 322 includes a left rod 3221 and a right rod 3225. The left rod 3221 has a stepped inner hole 3222 on one side, meaning the inner hole 3222 has two inner diameters, decreasing in size. The other end of the left rod 3221 is connected to a sliding block 321. The right rod 3225 has a stepped nested column 3226 on one side, meaning the nested column 3226 has two outer diameters, decreasing in size. The two inner diameters of the inner hole 3222 and the two outer diameters of the nested column 3226 are connected. With the diameters matched, a push spring 3227 is provided between the nested column 3226 and the fixed inner hole 3222 to drive the two sets of sliding blocks 321 to unfold or retract. That is, the push spring 3227 is nested on the columnar part with the small inner diameter of the nested column 3226 and pressed against the hole wall with the large inner diameter of the inner hole 3222. Without the action of external force, the push spring 3227 unfolds to open the left rod 3221 and the right rod 3225, thereby completing the outward unfolding state of the two sets of sliding blocks 321.

[0050] When the movable plate is pressed down, the speed-increasing auxiliary component 32 retracts. The bottom surface of the piston plate 21 presses down on the corresponding outwardly extending sliding block 321, causing the sliding block 321 to retract along the groove of the inclined surface of the piston plate 21. As the two sets of sliding blocks retract towards the center, the push spring 3227 in the elastic component 322 is compressed. As a result, the nested column 3226 of the right rod 3225 continues to penetrate deeper into the inner hole 3222, causing the combined length of the left rod 3221 and the right rod 3225 to retract, and finally all the sliding blocks 321 are gathered into the groove.

[0051] The left rod 3221 has a positioning post 3223 inside the inner hole 3222, and the right rod 3225 has a positioning hole 3224 inside the nested post 3226. The positioning post 3223 and the positioning hole 3224 are slidably nested, and the positioning hole 3224 is provided with a buffer pad adapted to the positioning post 3223.

[0052] The positioning pin 3223 of the left rod 3221 slides and nests with the positioning hole 3224 of the right rod 3225. This is also to ensure that the movement trajectory of the sliding block 321 is linear and to guide the movement direction of the sliding block 321. This buffer pad can reduce mechanical damage to the hydraulic cylinder during reciprocating motion.

[0053] The piston rod 2 drives the piston plate 21 to disengage from the sliding block 321, and the elastic component 322 pushes the sliding block 321 to unfold outward. During the unfolding process, the sliding block 321 pushes the bottom of the striking rod 313 to quickly strike the bottom of the piston plate 21.

[0054] After external oil enters the cylinder housing 3 through the oil port, the piston plate 21 moves slowly upward, thereby reducing the hydraulic pressure above the piston plate 21. Under the push of the elastic component 322, the sliding block 321 quickly unfolds outward from the groove at the bottom of the piston plate 21. Then, the inclined surface of the top of the sliding block 321 pushes the inclined surface of the bottom of the striking rod 313 of the top plate 311, causing the striking rod 313 to rise rapidly and impact the bottom surface of the piston plate 21. The impact force can increase the initial velocity of the piston plate 21 moving upward, thereby increasing the initial velocity of the hydraulic cylinder at low temperature.

[0055] Specific embodiment 2 differs from specific embodiment 1 in that: a striking spring 3154 is added inside the annular groove 3153, and the outer ring 3151 of the top plate 311 engages with and squeezes the striking spring 3154 in the annular groove 3153.

[0056] The upper and lower ends of the striking spring 3154 can be fixed to the bottom of the outer ring 3151 and the bottom of the ring groove 3153 respectively, so that the striking spring 3154 can form a stroke-limiting structure similar to that in specific embodiment 1. However, the striking spring 3154 increases the elasticity of the top plate 311 in the speed-up action. After the striking head 312 of the striking rod 313 completes the striking with the help of the speed-up auxiliary component, the striking spring 3154 unfolds synchronously with the unfolding of the sliding block 321 and the disengagement of the piston plate 21, so that the top plate 311 also strikes the bottom of the piston plate 21 under the action of the striking spring 3154.

[0057] Further explanation is provided regarding how the heat generated during mechanical work helps raise the temperature of the hydraulic fluid, allowing the hydraulic cylinder to reach its optimal state sooner.

[0058] During the reciprocating compression process of a spring, the friction between its molecules leads to energy dissipation, which manifests as the generation of heat.

[0059] Meanwhile, during the reciprocating motion of the oil cylinder, the sliding block 321 also moves along a linear path. The inclined surface of the striking rod 313 and the inclined surface of the sliding block 321 slide and rub against each other. The friction from these two actions also generates heat.

[0060] The striking head 312 of the striking rod 313 also generates heat when it strikes the bottom of the piston plate 21.

[0061] The speed-increasing action generated by the entire speed-increasing component 31 and the auxiliary speed-increasing component 31 will generate some heat. Since both are concentrated in the oil inlet 5, the oil will pass through both when entering the hydraulic cylinder, and the heat will be carried away, which can help increase the oil temperature.

[0062] Specific working principle;

[0063] The oil tank is used in conjunction with the oil tank, safety valve and hydraulic pump. The hydraulic pump is connected to the oil inlet 5 through the safety valve and connecting pipe. By starting the hydraulic pump, the oil in the oil tank is sent to the piston plate 21 below the hydraulic tank through the oil inlet 5. The oil in the cylinder shell 3 enters the oil tank through the return hole 4.

[0064] Oil enters through the oil inlet 5, thereby raising the height of the piston plate 21. The piston plate 21 pushes the piston rod 2 and the connector 1 to rise. Under the push of the elastic component 322, the sliding block 321 quickly unfolds outward from the groove at the bottom of the piston plate 21. The push spring 3227 of the elastic component 322 unfolds and opens the left rod 3221 and the right rod 3225. Then, the top inclined surfaces of the two sets of sliding blocks 321 push the bottom inclined surfaces of the two sets of striking rods 313 of the top plate 311, so that the height of the striking rods 313 rises rapidly and the striking head 312 impacts the bottom surface of the piston plate 21. The impact force can increase the initial velocity of the piston plate 21 moving upward. Similarly, the striking rods 313 corresponding to the other sliding blocks 321 perform the same action.

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

[0066] When the hydraulic pump reverses and draws oil out of the oil inlet 5, the piston plate 21 resets, causing the piston rod 2 and the connector 1 to descend. The bottom surface of the piston plate 21 presses down on the corresponding outwardly unfolding sliding block 321, causing the sliding block 321 to retract along the groove on the inclined surface of the piston plate 21. As the two sets of sliding blocks retract towards the center, the push spring 3227 in the elastic component 322 is compressed. Consequently, the nesting post 3226 of the right rod 3225 continuously penetrates into the inner hole 3222, causing the combined length of the left rod 3221 and the right rod 3225 to retract, ultimately gathering all the sliding blocks 321 into the groove. During this process, the positioning post 3223 of the left rod 3221 slides and nests with the positioning hole 3224 of the right rod 3225, ensuring that the movement trajectory of the sliding block 321 is linear.

[0067] The piston rod 2 of the hydraulic cylinder starts at low temperature, and the piston plate 21 moves up and down repeatedly in the cylinder housing 3, which can accelerate the speed-up action through the speed-up component 31 and the speed-up auxiliary component 32.

[0068] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A hydraulic cylinder initial velocity increaser, comprising: A cylinder housing (3) is provided with a return hole (4) and an oil inlet hole (5) on one side. A piston plate (21) is slidably installed inside the cylinder housing (3). A piston rod (2) is connected to the side wall of the piston plate (21). A connector (1) is connected to the other end of the piston rod (2). The cylinder housing (3) is characterized in that a speed-increasing auxiliary component (32) is provided at the bottom of the cylinder housing (3) corresponding to the piston plate (21). A speed-increasing component (31) is installed between the speed-increasing auxiliary component (32) and the piston plate (21). The speed-increasing auxiliary component (32) includes a sliding block (321) and an elastic component (322). All the sliding blocks (321) are arranged in a ring. The top surface of the sliding block (321) is an inclined surface that slopes outward. The two ends of a single elastic component (322) are respectively connected to the sliding block (321). The two sets of sliding blocks (321) can contract inward or expand outward through the elastic component (322). The outer wall of the top plate (311) of the speed-increasing component (31) slides against the inner wall of the cylinder shell (3). The top wall of the top plate (311) is slidably nested with a striking rod (313). The striking rod (313) corresponds one-to-one with the sliding block (321). The bottom wall of the top plate (311) is slidably nested with a ring component (315). The top plate (311) has a central hole (314) at the top, and the bottom surface of the piston plate (21) has a groove to accommodate all the inwardly retracting sliding blocks (321); The piston rod (2) drives the piston plate (21) to disengage from the sliding block (321), and the elastic component (322) pushes the sliding block (321) to unfold outward. During the unfolding process, the sliding block (321) pushes the bottom of the striking rod (313) to quickly strike the bottom of the piston plate (21). The cylinder housing (3) has a speed-increasing rubber pad (33) on the inner wall corresponding to the annular assembly (315). The annular assembly (315) includes a limiting ring (3152). The limiting ring (3152) has an annular groove (3153) on the side wall corresponding to the top plate (311). The top plate (311) has 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). A striking spring (3154) is added inside the annular groove (3153), and the outer ring (3151) of the top plate (311) engages with the striking spring (3154) in the annular groove (3153).

2. The hydraulic cylinder initial velocity increaser 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 respectively provided with eight striking rods (313). The bottom surface of the striking rod (313) is an inclined surface towards the center of the annular component (315).

3. The hydraulic cylinder initial velocity increaser according to claim 1, characterized in that, The top of the striking rod (313) is connected to a striking head (312), and the hole on the top plate (311) that is adapted to the striking rod (313) is provided with a countersunk groove for receiving the striking head (312).

4. The hydraulic cylinder initial velocity increaser according to claim 2, characterized in that, The elastic component (322) includes a left rod (3221) and a right rod (3225). The left rod (3221) has a stepped inner hole (3222) on one side and a sliding block (321) at the other end. The right rod (3225) has a stepped nested column (3226) on one side and a push spring (3227) between the nested column (3226) and the fixed inner hole (3222) for driving the two sets of sliding blocks (321) to unfold or retract.

5. A hydraulic cylinder initial velocity increaser according to claim 4, characterized in that, The inner hole (3222) of the left rod (3221) is provided with a stepped positioning post (3223), and the nested post (3226) of the right rod (3225) is provided with a stepped positioning hole (3224). The positioning post (3223) and the positioning hole (3224) are slidably nested, and a push spring (3227) is provided between the positioning post (3223) and the positioning hole (3224) for driving the two sets of sliding blocks (321) to unfold or retract. The positioning hole (3224) is provided with a buffer pad adapted to the positioning post (3223).

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