Concrete pump cylinder anti-impact anti-loose piston assembly
By combining the piston mounting base, sealing ring, sealing seat, and crescent-shaped locking block, the problem of loosening and connection failure of traditional piston assemblies under hydraulic impact is solved, thus achieving stable operation and convenient maintenance of the concrete pump cylinder.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN XINGYANG MACHINERY CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-06-26
AI Technical Summary
Traditional piston assemblies are prone to loosening and connection failure when subjected to frequent hydraulic shocks, affecting the stable operation of concrete pump cylinders.
It adopts a combination structure of piston fixing seat, sealing ring, sealing seat, docking plate and crescent block, and forms a ring-shaped surrounding structure through the connection of bolts and raised grooves, which disperses the impact force and enhances the connection strength. The positioning rod ensures alignment and prevents eccentric rotation.
It improves the connection stability and impact resistance of the piston assembly, ensures the stable operation of the concrete pump cylinder, and facilitates the independent replacement and maintenance of components such as seals, reducing spare parts costs and maintenance time.
Smart Images
Figure CN224414013U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of piston technology, and in particular to an impact-resistant and anti-loosening piston assembly for a concrete pump cylinder. Background Technology
[0002] As a key actuator in the hydraulic system of concrete pumping equipment, the piston of the concrete pump cylinder plays a crucial role in converting hydraulic energy into mechanical energy, thereby continuously transporting concrete within the pipeline. During actual operation, oil enters the rodless chamber of one cylinder, propelling the piston forward and causing the connected concrete piston to discharge concrete. Simultaneously, oil enters the rod chamber of another cylinder, causing the piston to retract and draw in concrete, thus achieving a cyclical operation through hydraulic circuit reversal.
[0003] Because the piston is frequently subjected to hydraulic shocks during reciprocating motion, the connection structure of traditional piston assemblies is prone to problems such as loosening of parts and connection failure when dealing with such shocks, which affects the stable operation of the concrete pump cylinder.
[0004] To address the aforementioned problems, this utility model document proposes an impact-resistant and anti-loosening piston assembly for a concrete pump cylinder. Utility Model Content
[0005] This utility model provides an impact-resistant and anti-loosening piston assembly for a concrete pump cylinder, which solves the shortcomings of the prior art. Because the piston is frequently subjected to hydraulic impact during reciprocating motion, the connection structure of the traditional piston assembly is prone to problems such as component loosening and connection failure when dealing with such impacts, which affects the stable operation of the concrete pump cylinder.
[0006] This utility model provides the following technical solution:
[0007] An impact-resistant and anti-loosening piston assembly for a concrete pump cylinder includes:
[0008] A piston fixing seat, wherein a sealing ring is snapped onto the roller surface of the piston fixing seat, a first mating plate is fixedly installed on one side of the piston fixing seat, and a sealing seat for limiting the sealing ring is detachably installed on the other side of the piston fixing seat;
[0009] A piston rod is provided on the other side of the first docking plate, and a second docking plate is fixedly provided at the end of the piston rod. The aligned first docking plate and second docking plate are reinforced by matching upper and lower half-moon locking blocks.
[0010] In one possible design, the sealing seat is inserted into the cavity in the center of the piston fixing seat via a central crossbar.
[0011] In one possible design, three first bolts are arranged in a circular array in the recessed opening at the center of the first mating plate. The first bolts pass through the reserved holes on the piston fixing seat and are threadedly connected to the threaded groove corresponding to the end of the central crossbar of the sealing seat.
[0012] In one possible design, three positioning rods for aligning with the first docking plate are fixedly arranged in a circular array on one side of the second docking plate, and the first docking plate is provided with positioning holes for inserting the corresponding positioning rods.
[0013] In one possible design, the upper half-moon block covers the top of the first and second mating discs after alignment, and the lower half-moon block covers the bottom of the first and second mating discs after alignment. Two second bolts are provided in the recesses at both ends of the upper half-moon block. The second bolts pass through the reserved holes on the upper half-moon block and are threadedly connected to the corresponding threaded grooves on the top of the upper half-moon block.
[0014] In one possible design, the outer wall of the second docking plate is provided with two sets of raised grooves to assist in the alignment of the two crescent-shaped locking blocks, and the inner walls of the upper and lower crescent-shaped locking blocks are provided with grooves for engaging the corresponding raised grooves.
[0015] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention.
[0016] The working principle and usage process of this technical solution are as follows:
[0017] During installation, the sealing ring is snapped onto the roller surface of the piston fixing seat, and then the sealing seat is inserted into the cavity in the center of the piston fixing seat through the central crossbar. The three first bolts arranged in a ring array with the central concave opening of the first mating plate are threaded through the reserved hole on the piston fixing seat and threaded into the threaded groove corresponding to the end of the central crossbar of the sealing seat, so as to realize the axial limit of the sealing seat on the sealing ring and prevent the sealing ring from falling out.
[0018] Next, the positioning holes on the first mating plate are connected to the three positioning rods on the second mating plate at the end of the piston rod to ensure precise alignment of the first and second mating plates and avoid misalignment that could lead to connection failure. Then, the upper half-moon block is used to cover the top of the aligned first and second mating plates, and the lower half-moon block is used to cover the bottom. The raised texture on the outer wall of the second mating plate is used to engage with the grooves on the inner walls of the upper and lower half-moon blocks to assist in the alignment of the two half-moon blocks. Finally, the second bolt is passed through the pre-drilled hole in the upper half-moon block and threadedly connected to the threaded groove on the top of the second mating plate to secure the upper and lower half-moon blocks, forming a ring-shaped encircling structure and enhancing the connection's impact resistance.
[0019] This utility model has the following beneficial effects:
[0020] This invention uses upper and lower crescent-shaped locking blocks to form a ring-shaped surrounding structure, dispersing the impact force to the entire surface of the docking plate, avoiding local stress concentration, and improving connection strength; the interlocking fit of the convex and groove further restricts the slippage of the crescent-shaped locking blocks, ensuring connection stability; the ring array layout of the positioning rod and positioning hole can withstand multi-directional shearing forces, preventing the piston rod and piston assembly from rotating eccentrically, thereby comprehensively ensuring the stable operation of the concrete pump cylinder.
[0021] In this utility model, the piston fixing seat and the sealing seat are detachably connected. The installation method of the upper half-moon locking block and the lower half-moon locking block makes the piston assembly more convenient to install and disassemble. It is easy to replace and maintain the sealing ring and other components independently. During maintenance, there is no need to replace the entire piston assembly, which reduces spare parts costs and maintenance time. Attached Figure Description
[0022] Figure 1 A three-dimensional structural schematic diagram of an impact-resistant and anti-loosening piston assembly for a concrete pump cylinder provided in an embodiment of this utility model;
[0023] Figure 2 A schematic diagram of the structure of a concrete pump cylinder anti-impact and anti-loosening piston assembly after the separation of the two crescent-shaped locking blocks, provided for an embodiment of this utility model;
[0024] Figure 3 A schematic diagram of the separation structure of two mating discs of a concrete pump cylinder anti-impact and anti-loosening piston assembly provided in this embodiment of the utility model;
[0025] Figure 4 A schematic diagram of the sealing ring installation structure in cross-section of a concrete pump cylinder anti-impact and anti-loosening piston assembly provided in this embodiment of the utility model.
[0026] Figure 5 This is a disassembly diagram of the sealing ring installation structure of a concrete pump cylinder anti-impact and anti-loosening piston assembly provided in this embodiment of the utility model.
[0027] Reference numerals: 1. Piston fixing seat; 2. Sealing ring; 3. First mating plate; 4. Sealing seat; 5. First bolt; 6. Piston rod; 7. Second mating plate; 8. Positioning rod; 9. Positioning hole; 10. Second bolt; 11. Upper half-moon retaining block; 12. Lower half-moon retaining block; 13. Raised pattern; 14. Groove. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0029] In the description of this utility model, it should be understood that the terms "opening", "upper", "middle", "length", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0030] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.
[0031] In one embodiment:
[0032] Please refer to Figure 1-5 A piston assembly includes a piston retainer 1, a sealing ring 2, a first mating plate 3, a sealing seat 4, a first bolt 5, a piston rod 6, a second mating plate 7, a positioning rod 8, a positioning hole 9, a second bolt 10, an upper crescent-shaped retaining block 11, a lower crescent-shaped retaining block 12, a raised texture 13, and a groove 14.
[0033] The piston fixing seat 1 is cylindrical, and the sealing ring 2 of nano-polyurethane composite material is snapped onto its roller surface. The first docking plate 3 is fixedly connected to one side of the piston fixing seat 1, and a detachable sealing seat 4 is provided on the other side. The sealing seat 4 has a crossbar in the center, and the piston fixing seat 1 has a cavity in the center. The sealing seat 4 is inserted into the cavity in the center of the piston fixing seat 1 through the crossbar. The inner recess in the center of the first docking plate 3 is arranged in a ring array with three first bolts 5. The piston fixing seat 1 is provided with corresponding reserved holes. The end of the crossbar in the center of the sealing seat 4 has a corresponding threaded groove. The first bolts 5 pass through the reserved holes on the piston fixing seat 1 and are threadedly connected to the corresponding threaded groove at the end of the crossbar in the center of the sealing seat 4, so as to realize the axial limit of the sealing ring 2 by the sealing seat 4 and prevent the sealing ring 2 from falling out.
[0034] The piston rod 6 is located on the other side of the first docking plate 3. The end of the piston rod 6 is fixedly connected to the second docking plate 7. Three positioning rods 8 are fixed in a circular array on one side of the second docking plate 7. The first docking plate 3 is provided with corresponding positioning holes 9. The positioning rods 8 can be inserted into the positioning holes 9 to ensure that the first docking plate 3 and the second docking plate 7 are accurately aligned and to avoid misalignment that could lead to connection failure.
[0035] The aligned first mating disc 3 and second mating disc 7 are reinforced by matching upper half-moon clamping blocks 11 and lower half-moon clamping blocks 12. The upper half-moon clamping block 11 covers the top of the aligned first mating disc 3 and second mating disc 7, and the lower half-moon clamping block 12 covers the bottom. Two second bolts 10 are provided in the recesses at both ends of the upper half-moon clamping block 11. The upper half-moon clamping block 11 has a reserved hole, and the top of the second mating disc 7 has a corresponding threaded groove. The second bolts 10 pass through the reserved hole on the upper half-moon clamping block 11 and are threadedly connected to the corresponding threaded groove on the top of the second mating disc 7, thereby achieving the fastening of the upper and lower half-moon clamping blocks and forming a ring-shaped encircling structure to enhance the connection's impact resistance.
[0036] During piston assembly installation, the sealing ring 2 is snapped onto the roller surface of the piston fixing seat 1, the crossbar of the sealing seat 4 is inserted into the central cavity of the piston fixing seat 1, and the three first bolts 5 of the central recess of the first mating plate 3 are threaded through the reserved hole on the piston fixing seat 1 and threadedly connected to the threaded groove at the end of the central crossbar of the sealing seat 4. Then, the positioning insertion hole 9 on the first mating plate 3 is inserted into the three positioning insertion rods 8 on the second mating plate 7 at the end of the piston rod 6, so that the first mating plate 3 and the second mating plate 7 are precisely aligned. Then, the upper half-moon clamping block 11 is covered on the top of the aligned first mating plate 3 and the second mating plate 7, and the lower half-moon clamping block 12 is covered on the bottom. Finally, the second bolt 10 is threaded through the reserved hole of the upper half-moon clamping block 11 and threadedly connected to the threaded groove on the top of the second mating plate 7 to achieve the fastening of the upper and lower half-moon clamping blocks.
[0037] When disassembling the piston assembly, first unscrew the second bolt 10, remove the upper half-moon retainer 11 and the lower half-moon retainer 12, then separate the first mating plate 3 and the second mating plate 7, and then remove the piston assembly as a whole. Unscrew the first bolt 5, pull out the sealing seat 4, and then the sealing ring 2 and other components can be replaced and maintained independently.
[0038] This application can be used for concrete pump cylinder pistons, and can also be used in other fields applicable to this application.
[0039] In another embodiment:
[0040] An impact-resistant and anti-loosening piston assembly for a concrete pump cylinder, which is used in the piston field;
[0041] Please refer to Figure 1-2 Two sets of raised patterns 13 are provided on the outer wall of the second docking plate 7. Corresponding grooves 14 are provided on the inner walls of the upper half-moon block 11 and the lower half-moon block 12. The raised patterns 13 and the grooves 14 are engaged to assist the two half-moon blocks in alignment.
[0042] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.
[0043] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. An impact-resistant and anti-loosening piston assembly for a concrete pump cylinder, characterized in that, include: Piston fixing seat (1), a sealing ring (2) is snapped onto the roller surface of the piston fixing seat (1), a first docking plate (3) is fixedly provided on one side of the piston fixing seat (1), and a sealing seat (4) for limiting the sealing ring (2) is detachably provided on the other side of the piston fixing seat (1). A piston rod (6) is provided on the other side of the first docking plate (3), and a second docking plate (7) is fixedly provided at the end of the piston rod (6). The aligned first docking plate (3) and second docking plate (7) are reinforced by matching upper half-moon clamping block (11) and lower half-moon clamping block (12).
2. The anti-impact and anti-loosening piston assembly for a concrete pump cylinder according to claim 1, characterized in that, The sealing seat (4) is inserted into the cavity in the center of the piston fixing seat (1) via the central crossbar.
3. The anti-impact and anti-loosening piston assembly for a concrete pump cylinder according to claim 2, characterized in that, The first docking plate (3) has three first bolts (5) arranged in a ring array in the central recess. The first bolts (5) pass through the reserved hole on the piston fixing seat (1) and are threadedly connected to the threaded groove corresponding to the end of the central crossbar of the sealing seat (4).
4. The anti-impact and anti-loosening piston assembly for a concrete pump cylinder according to claim 1, characterized in that, The second docking plate (7) has three positioning rods (8) fixedly arranged in a ring array on one side for aligning with the first docking plate (3). The first docking plate (3) has positioning holes (9) for inserting the corresponding positioning rods (8).
5. The anti-impact and anti-loosening piston assembly for a concrete pump cylinder according to claim 4, characterized in that, The upper half-moon block (11) covers the top of the first docking plate (3) and the second docking plate (7) after alignment, and the lower half-moon block (12) covers the bottom of the first docking plate (3) and the second docking plate (7) after alignment. Two second bolts (10) are provided in the recesses at both ends of the upper half-moon block (11). The second bolts (10) pass through the reserved holes on the upper half-moon block (11) and are threadedly connected to the corresponding threaded groove on the top of the upper half-moon block (11).
6. The anti-impact and anti-loosening piston assembly for a concrete pump cylinder according to claim 5, characterized in that, The outer wall of the second docking plate (7) is provided with two sets of ridges (13) to assist the alignment of the two crescent-shaped locking blocks, and the inner walls of the upper crescent-shaped locking block (11) and the lower crescent-shaped locking block (12) are provided with grooves (14) for engaging the corresponding ridges (13).