Impact rammer with shock-absorbing function

Abstract

The present invention relates to the technical field of building construction equipment, and more specifically, it relates to a rammer with a shock-absorbing function, comprising a rammer main body, the rammer main body comprising an upper sleeve, a dustproof folding box and a lower sleeve connected in sequence, a piston slidably arranged in the upper sleeve, the piston comprising a plug core and a plug ring, the upper end of the plug core is connected to a crank connecting rod, the lower end of the plug core is connected to a bottom plate, the bottom of the lower sleeve is connected to a ramming plate, a positioning spring is connected between the bottom plate and the ramming plate, the plug ring is sleeved on the outer wall of the plug ring, the outer wall of the plug ring is fitted with the inner wall of the upper sleeve, a reversing locking structure is arranged between the upper sleeve, the plug ring and the plug core, the reversing locking structure controls the plug ring to switch between a locking connection with the plug core and a locking connection with the upper sleeve. While having a shock-absorbing effect, the present invention further solves the problem of insufficient single-use time and long-term service life of the rammer due to a single working friction surface.

Description

Technical Field

[0001] The invention relates to the technical field of building construction equipment, in particular to an impact rammer with a shock absorbing function. Background Art

[0002] Impact rammer, also known as impact hammer or vibration rammer, is a commonly used soil compaction equipment, widely used in construction, civil engineering and road engineering. Its main function is to increase the density of soil by applying impact force or vibration, so that the soil reaches the design bearing capacity and ensures the stability and safety of subsequent projects.

[0003] Since the rammer will cause the handle to vibrate when performing vibration tamping operations, it is difficult for workers to hold the handle firmly. For this reason, the utility model patent with patent publication number CN215252787U proposes a rammer with a shock-absorbing effect, which includes a rammer body and a handle, the two opposite ends of the rammer body are fixedly connected with a first flange, the two ends of the handle are fixedly connected with a second flange, and a shock-absorbing block arranged in a cylindrical shape is arranged between any first flange and the second flange, and any shock-absorbing block is detachably connected to the corresponding first flange and second flange. The above-mentioned rammer can reduce the impact of vibration on the handle when the rammer body performs tamping operations by arranging the shock-absorbing block at the connection between the rammer body and the handle, which is conducive to the workers holding the handle firmly, and has the characteristics of strong practicality and good shock-absorbing effect.

[0004] like Figure 1 As shown, the rammer with shock-absorbing effect mentioned above may include an upper sleeve 1, a dustproof folding box 2 and a lower sleeve 3 connected in sequence, a piston 4 is slidably arranged in the upper sleeve 1, a crank connecting rod 5 is connected to the upper end of the piston 4, a ram plate 6 is connected to the lower end of the lower sleeve 3, and a positioning spring 7 is connected between the piston 4 and the ram plate 6. In the working state, the driving member on one side of the rammer body drives the crank connecting rod 5 to move, so that the crank connecting rod 5 moves up and down reciprocatingly and drives the piston 4, so that the piston 4 continuously compresses and stretches the positioning spring 7, and finally utilizes the energy released by the positioning spring 7 to make the ram plate 6 continuously jump up and press down, thereby impacting the construction ground and compacting the ground. However, when the above-mentioned rammer is working, its working friction surface is always the contact surface between the piston 4 and the upper sleeve 1, and a single working friction surface is prone to overheating, thereby reducing the single use time and long-term service life of the rammer. Summary of the invention

[0005] In order to further solve the problem of insufficient single-use time and long-term service life of the rammer due to a single working friction surface while having a shock-absorbing effect, the present application provides a rammer with a shock-absorbing function.

[0006] The rammer with shock-absorbing function provided by the present invention adopts the following technical solution:

[0007] A rammer with a shock-absorbing function comprises a rammer body, the rammer body comprises an upper sleeve, a dustproof folding box and a lower sleeve connected in sequence, a piston is slidably arranged in the upper sleeve, the piston comprises a plug core and a plug ring, the upper end of the plug core is connected to a crank connecting rod, the lower end of the plug core is connected to a bottom plate, the bottom of the lower sleeve is connected to a ramming plate, a positioning spring is connected between the bottom plate and the ramming plate, the plug ring is sleeved on the outer wall of the plug core, and the outer wall of the plug ring is fitted with the inner wall of the upper sleeve; a reversing locking structure is arranged between the upper sleeve, the plug ring and the plug core, and the reversing locking structure controls the plug ring to switch between a locking connection with the plug core and a locking connection with the upper sleeve.

[0008] Preferably, the reversing locking structure includes an electromagnet, a mounting block, a locking block and a reset spring, the mounting block is arranged on the top of the plug ring, the mounting block is provided with a locking hole, the two ends of the locking hole are respectively facing the outer wall of the plug core and the inner wall of the upper sleeve, the locking block is slidably arranged in the locking hole; the end of the locking hole close to the plug core is the first end, the end of the locking hole close to the upper sleeve is the second end, the outer wall of the plug core is provided with a groove, the groove is opposite to the first end of the locking hole, the inner wall of the upper sleeve is provided with a through hole extending outward, and the through hole is opposite to the first end of the locking hole The second end of the lock hole is opposite, and the return spring is connected between the lock block and the lock hole. The return spring controls one end of the lock block to extend from the first end of the lock hole and embed into the groove. The electromagnet is arranged on the outer wall of the upper sleeve, and the magnetic end of the electromagnet extends into the through hole. An iron block is embedded in one end of the lock block facing the through hole. After the electromagnet is energized, it controls one end of the lock block to extend from the second end of the lock hole and embed into the through hole. The adsorption force of the electromagnet on the lock block is greater than the elastic force of the return spring on the lock block.

[0009] Preferably, two groups of the reversing locking structures are provided, and the two groups of the reversing locking structures are arranged radially opposite to each other in the upper sleeve.

[0010] Preferably, a temperature sensor is provided on the outer wall of the upper sleeve, and the temperature sensor is used to monitor the temperature of the contact surface between the plug ring and the inner wall of the upper sleeve. The temperature sensor is connected to a display instrument.

[0011] Preferably, a controller is connected between the temperature sensor and the electromagnet, and the controller is provided with a first switching threshold and a second switching threshold, the value of the first switching threshold is greater than the value of the second switching threshold, and when the temperature value monitored by the temperature sensor exceeds the first switching threshold, the controller controls the electromagnet to be powered on, and when the temperature value monitored by the temperature sensor is lower than the second switching threshold, the controller controls the electromagnet to be powered off.

[0012] Preferably, the diameter of the bottom plate is larger than the diameter of the plug core, the plug core is coaxial with the bottom plate, and the top edge of the plug core is chamfered.

[0013] Preferably, the diameter of the base plate is smaller than the inner diameter of the upper sleeve.

[0014] Preferably, an annular mounting groove is provided at the bottom of the plug ring, and a heat insulating ring is embedded in the mounting groove.

[0015] Preferably, the thermal insulation ring is a ceramic fiber thermal insulation material.

[0016] Preferably, the through hole of the reversing locking structure is also used for injecting lubricating oil.

[0017] The beneficial effects of the present invention are:

[0018] When the plug ring is locked and connected with the plug core, the contact surface between the plug ring and the upper sleeve serves as the working friction surface. When the plug ring is locked and connected with the upper sleeve, the contact surface between the plug ring and the plug core serves as the working friction surface, so that the interior of the rammer body has two working friction surfaces. Compared with one working friction surface, the rammer body of the present invention can better avoid overheating, thereby having a shock-absorbing effect and further solving the problem of insufficient single-use time and long-term service life of the rammer caused by a single working friction surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the internal structure of the impact rammer body in the background technology;

[0020] Figure 2 is a schematic diagram of the internal structure of the rammer body in the embodiment of the present application;

[0021] Figure 3 yes Figure 2 A partial enlarged view of

[0022] Figure 4 is a schematic diagram of the structure of the installation block in the embodiment of the present application;

[0023] Explanation of the accompanying drawings: 1. upper sleeve; 2. dustproof folding box; 3. lower sleeve; 4. piston; 41. plug core; 42. bottom plate; 43. plug ring; 44. insulation ring; 5. crank connecting rod; 6. ramming plate; 7. positioning spring; 81. electromagnet; 82. through hole; 83. mounting block; 84. locking hole; 85. locking block; 86. iron block; 87. connecting block; 88. reset spring; 89. groove; 9. temperature sensor. DETAILED DESCRIPTION

[0024] The following will be combined with the attached Figure 2 -Attached Figure 4 The present invention is further illustrated by the following embodiments.

[0025] This embodiment discloses a rammer with a shock absorbing function.

[0026] Reference Figures 2 to 4 The rammer with shock absorption function includes a rammer body, which includes an upper sleeve 1, a dustproof folding box 2 and a lower sleeve 3 connected in sequence. A piston 4 is slidably arranged in the upper sleeve 1, a crank connecting rod 5 is connected to the upper end of the piston 4, a ram plate 6 is connected to the lower end of the lower sleeve 3, and a positioning spring 7 is connected between the piston 4 and the ram plate 6. In particular, the piston 4 includes a plug core 41 and a plug ring 43, the lower end of the crank connecting rod 5 is connected to the upper end of the plug core 41, the lower end of the plug core 41 is fixedly connected to the bottom plate 42, the upper end of the positioning spring 7 is connected to the lower end of the bottom plate 42, the plug ring 43 is sleeved on the outer wall of the plug core 41, and the outer wall of the plug ring 43 is in contact with the inner wall of the upper sleeve 1. Further, a reversing locking structure is arranged between the upper sleeve 1, the plug ring 43 and the plug core 41, and the reversing locking structure controls the plug ring 43 to switch between locking connection with the plug core 41 and locking connection with the upper sleeve 1. Through this arrangement, when the plug ring 43 is locked and connected with the plug core 41, the contact surface between the plug ring 43 and the upper sleeve 1 serves as a working friction surface. When the plug ring 43 is locked and connected with the upper sleeve 1, the contact surface between the plug ring 43 and the plug core 41 serves as a working friction surface, so that the interior of the rammer body has two working friction surfaces. Compared with one working friction surface, the rammer body of the present invention can better avoid overheating, thereby having a shock-absorbing effect and further solving the problem of insufficient single-use time and long-term service life of the rammer due to a single working friction surface.

[0027] Reference Figures 2 to 4The reversing locking structure includes an electromagnet 81, a mounting block 83, a locking block 85 and a reset spring 88. The mounting block 83 is arranged on the top of the plug ring 43. A locking hole 84 is horizontally penetrated through the mounting block 83. The two ends of the locking hole 84 are respectively facing the outer wall of the plug core 41 and the inner wall of the upper sleeve 1. The locking block 85 is slidably arranged in the locking hole 84. The length of the locking block 85 is longer than the length of the locking hole 84, so that the locking block 85 always keeps one end extending out of the locking hole 84. In this embodiment, the end of the locking hole 84 close to the plug core 41 is the first end, and the end of the locking hole 84 close to the upper sleeve 1 is the second end. The outer wall of the plug core 41 is provided with a groove 89, which is opposite to the first end of the locking hole 84. The inner wall of the upper sleeve 1 is provided with a through hole 82 which is opposite to the second end of the locking hole 84. When one end of the locking block 85 extends from the first end of the locking hole 84, the end of the locking block 85 is embedded in the groove 89, so that the plug ring 43 and the plug core 41 are locked and connected. When the other end of the locking block 85 extends from the second end of the locking hole 84, the end of the locking block 85 is embedded in the through hole 82, so that the plug ring 43 and the upper sleeve 1 are locked and connected. The inner wall of the locking hole 84 is provided with a spring groove, and the outer wall of the locking block 85 is provided with a connecting block 87, which is located in the spring groove. A return spring 88 is connected between the connecting block 87 and the spring groove. The return spring 88 controls one end of the locking block 85 to extend from the first end of the locking hole 84, so as to control the locking block 85 to be embedded in the groove 89. The electromagnet 81 is arranged on the outer wall of the upper sleeve 1, and the magnetic end of the electromagnet 81 extends into the through hole 82. An iron block 86 is embedded in one end of the lock block 85 facing the through hole 82. When the electromagnet 81 is energized, one end of the lock block 85 is controlled to extend from the second end of the lock hole 84, thereby controlling the lock block 85 to be embedded in the through hole 82. In addition, the adsorption force of the electromagnet 81 on the lock block 85 is greater than the elastic force of the return spring 88 on the lock block 85. Through the above arrangement, when it is necessary to use the contact surface between the plug ring 43 and the upper sleeve 1 as the working friction surface, the electromagnet 81 is powered off, and the locking block 85 is embedded in the groove 89 of the plug core 41 under the action of the reset spring 88, so that the plug core 41 drives the plug ring 43 to move during the up and down movement, and finally the contact surface between the plug ring 43 and the upper sleeve 1 is used as the working friction surface. When it is necessary to use the contact surface between the plug ring 43 and the plug core 41 as the working friction surface, the electromagnet 81 is powered on, and the locking block 85 is embedded in the through hole 82 of the upper sleeve 1 under the adsorption action of the electromagnet 81, so that the plug core 41 no longer drives the plug ring 43 to move during the up and down movement, and finally the contact surface between the plug ring 43 and the plug core 41 is used as the working friction surface, thereby achieving the effect that the interior of the rammer body has two working friction surfaces.

[0028] Reference Figure 3 The through hole 82 of the reversing locking structure can also be used for oil injection. By disassembling the electromagnet 81 and injecting lubricating oil into it through the through hole 82, the lubrication condition in the upper sleeve 1 can be improved in time.

[0029] Reference Figure 3 and Figure 4 In this embodiment, two groups of reversing locking structures are provided, and the two groups of reversing locking structures are arranged radially opposite to each other in the upper sleeve 1 to improve the connection effect between the plug ring 43 and the plug core 41 and between the plug ring 43 and the upper sleeve 1. In addition, a temperature sensor 9 is provided on the outer wall of the upper sleeve 1. The temperature sensor 9 is used to monitor the temperature of the contact surface between the plug ring 43 and the inner wall of the upper sleeve 1. The temperature sensor 9 is connected to a display instrument so that the staff can understand the temperature condition. Furthermore, a controller is connected between the temperature sensor 9 and the electromagnet 81. The controller is provided with a first switching threshold and a second switching threshold. The value of the first switching threshold is greater than the value of the second switching threshold. When the temperature value monitored by the temperature sensor 9 exceeds the first switching threshold, the controller controls the electromagnet 81 to be energized, so that the plug ring 43 is connected to the upper sleeve 1, so as to switch the working friction surface, and gradually reduce the temperature of the contact surface between the plug ring 43 and the inner wall of the upper sleeve 1. Afterwards, when the temperature value monitored by the temperature sensor 9 is lower than the second switching threshold, the controller controls the electromagnet 81 to be de-energized, so that the plug ring 43 is connected to the plug core 41, so as to switch the working friction surface again. In summary, by providing the temperature sensor 9 and the controller, the automatic switching of the working friction surface in the rammer body is achieved.

[0030] Reference Figures 2 to 4Since the through hole 82, the lock hole 84 and the groove 89 may not be at the same height at the moment when the electromagnet 81 is powered on and off, this situation may easily lead to the inability to smoothly switch the working friction surface. Therefore, the present invention also makes the following improvements. First, the diameter of the bottom plate 42 at the bottom of the plug core 41 is larger than the diameter of the plug core 41, and the plug core 41 is coaxial with the bottom plate 42, so that the outer edge of the bottom plate 42 can support the plug ring 43. Secondly, the top edge of the plug core 41 is chamfered. Through the above modification, when the electromagnet 81 is switched from energized to de-energized, if the through hole 82, the locking hole 84 and the groove 89 are not at the same height, the plug ring 43 will automatically fall until it is caught by the bottom plate 42. During this process, the locking block 85 will contact the top chamfer of the plug core 41 and retract until the locking hole 84 is aligned with the groove 89 and then pop out, thereby smoothly connecting the plug ring 43 with the plug core 41; when the electromagnet 81 is switched from de-energized to energized, if the through hole 82, the locking hole 84 and the groove 89 are not at the same height, the plug ring 43 will still maintain connection with the plug core 41 under the action of the reset spring 88 until it moves up to the through hole 82, the locking hole 84 and the groove 89 are aligned, and the locking block 85 will be adsorbed by the electromagnet 81 and embedded in the through hole 82, thereby smoothly connecting the plug ring 43 with the upper sleeve 1. Through the above arrangement, no matter whether the through hole 82, the lock hole 84 and the groove 89 are at the same height at the moment when the electromagnet 81 is powered on or off, the switching of the working friction surface can be smoothly achieved. It should be noted that the diameter of the bottom plate 42 is smaller than the inner diameter of the upper sleeve 1, so as to avoid friction between the bottom plate 42 and the inner wall of the upper sleeve 1, thereby reducing the resistance of the plug core 41 when it moves up and down, and also avoiding overheating of the bottom plate 42 due to continuous friction.

[0031] Reference Figure 3 , a heat insulating ring 44 is arranged inside the plug ring 43, and the heat insulating ring 44 is used to reduce the heat transfer between the two working friction surfaces. Specifically, an annular installation groove is provided at the bottom of the plug ring 43, and the heat insulating ring 44 is embedded in the installation groove to realize the arrangement of the heat insulating ring 44 inside the plug ring 43. In this embodiment, the heat insulating ring 44 is a ceramic fiber heat insulating material. In other embodiments, foam heat insulating materials, glass fiber heat insulating materials, aluminum silicate heat insulating materials and rubber heat insulating materials can also be selected. By arranging the heat insulating ring 44, when one of the working friction surfaces is rubbing, the other working friction surface can be cooled down faster to prepare for the next switching of the working friction surfaces.

[0032] The above are all preferred embodiments of the present invention, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rammer with a shock absorbing function, characterized in that: The rammer comprises an impact rammer body, the impact rammer body comprises an upper sleeve (1), a dustproof folding box (2) and a lower sleeve (3) which are connected in sequence, a piston (4) is slidably arranged in the upper sleeve (1), the piston (4) comprises a plug core (41) and a plug ring (43), the upper end of the plug core (41) is connected to a crank connecting rod (5), the lower end of the plug core (41) is connected to a bottom plate (42), the bottom of the lower sleeve (3) is connected to a rammer plate (6), the bottom plate (42) and the A positioning spring (7) is connected between the ram plates (6); the plug ring (43) is sleeved on the outer wall of the plug core (41); the outer wall of the plug ring (43) is in contact with the inner wall of the upper sleeve (1); a reversing locking structure is provided between the upper sleeve (1), the plug ring (43) and the plug core (41); the reversing locking structure controls the plug ring (43) to switch between a locking connection with the plug core (41) and a locking connection with the upper sleeve (1); The reversing locking structure comprises an electromagnet (81), a mounting block (83), a locking block (85) and a reset spring (88); the mounting block (83) is arranged at the top of the plug ring (43); the mounting block (83) is provided with a locking hole (84); the two ends of the locking hole (84) are respectively facing the outer wall of the plug core (41) and the inner wall of the upper sleeve (1); the locking block (85) is slidably arranged in the locking hole (84); the end of the locking hole (84) close to the plug core (41) is the first end; the end of the locking hole (84) close to the upper sleeve (1) is the second end; the outer wall of the plug core (41) is provided with a groove (89); the groove (89) is opposite to the first end of the locking hole (84); the inner wall of the upper sleeve (1) is provided with a through hole (82) extending outward; the through hole (82) is in contact with the through hole (82); The second end of the locking hole (84) is opposite to the second end of the locking hole (84), the reset spring (88) is connected between the locking block (85) and the locking hole (84), the reset spring (88) controls one end of the locking block (85) to extend from the first end of the locking hole (84) and embed into the groove (89), the electromagnet (81) is arranged on the outer wall of the upper sleeve (1), the magnetic end of the electromagnet (81) extends into the through hole (82), an iron block (86) is embedded at one end of the locking block (85) facing the through hole (82), and the electromagnet (81) controls one end of the locking block (85) to extend from the second end of the locking hole (84) and embed into the through hole (82) after being energized, and the adsorption force of the electromagnet (81) on the locking block (85) is greater than the elastic force of the reset spring (88) on the locking block (85).

2. The rammer with shock absorbing function according to claim 1, characterized in that: The reversing locking structure is provided in two groups, and the two groups of the reversing locking structure are arranged opposite to each other in the upper sleeve (1) along the radial direction.

3. The rammer with shock absorbing function according to claim 1, characterized in that: The outer wall of the upper sleeve (1) is provided with a temperature sensor (9), and the temperature sensor (9) is used to monitor the temperature of the contact surface between the plug ring (43) and the inner wall of the upper sleeve (1). The temperature sensor (9) is connected to a display instrument.

4. The rammer with shock absorbing function according to claim 3, characterized in that: A controller is connected between the temperature sensor (9) and the electromagnet (81), and the controller is provided with a first switching threshold and a second switching threshold, the value of the first switching threshold being greater than the value of the second switching threshold, and when the temperature value monitored by the temperature sensor (9) exceeds the first switching threshold, the controller controls the electromagnet (81) to be powered on, and when the temperature value monitored by the temperature sensor (9) is lower than the second switching threshold, the controller controls the electromagnet (81) to be powered off.

5. The rammer with shock absorbing function according to claim 4, characterized in that: The diameter of the bottom plate (42) is greater than the diameter of the plug core (41); the plug core (41) is coaxial with the bottom plate (42); and the top edge of the plug core (41) is chamfered.

6. The rammer with shock absorbing function according to claim 1, characterized in that: The diameter of the bottom plate (42) is smaller than the inner diameter of the upper sleeve (1).

7. The rammer with shock absorbing function according to claim 1, characterized in that: An annular mounting groove is provided at the bottom of the plug ring (43), and a heat insulating ring (44) is embedded in the mounting groove.

8. The rammer with shock absorbing function according to claim 7, characterized in that: The heat insulation ring (44) is made of ceramic fiber heat insulation material.

9. The rammer with shock absorbing function according to claim 1, characterized in that: The through hole (82) of the reversing locking structure is also used for injecting lubricating oil.

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