Removable crankshaft swing arm assembly

Abstract

The utility model relates to technical field of crankshaft swing arm, and disclose detachable crankshaft swing arm assembly, and set up dismounting mechanism on rack shell and top cap, set up crankshaft swing arm mechanism on rack shell, the dismounting mechanism includes long slot, the four around of top cap back is fixedly connected with long piece respectively, the inside of long piece is opened and is limited to limit slot, the inside of limit slot is inserted and is connected with limit block, the side fixedly connected with connecting plate of two limit blocks away from rack shell, the front and back two sides of connecting plate are opened and have rectangular slot, the left and right sides fixedly connected with connecting seat of rack shell, the inside screw thread connection of connecting seat and connecting plate has bolt. This detachable crankshaft swing arm assembly, through dismounting mechanism, bolt screw thread takes down after, pulls connecting plate and drives limit block to take out from limit slot, simultaneously, connecting seat can also take out from rectangular slot, can pull top cap and drive long piece to take out from long slot after, take out top cap from the top of rack shell conveniently, handle the dismounting of crankshaft swing arm mechanism conveniently.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft swing arm technology, specifically to a detachable crankshaft swing arm assembly. Background Technology

[0002] In modern industrial equipment, crankshaft rocker arm assemblies, as core components of power transmission, are widely used in equipment such as injection molding machines, compressors, and construction machinery. With the increasing level of industrial automation and the need to control equipment maintenance costs, the traditional non-removable or complex disassembly designs of crankshaft rocker arm assemblies are no longer sufficient to meet the requirements of efficient maintenance.

[0003] Traditional crankshaft rocker arm assemblies often adopt an integrated or bolt-fastened closed structure. The rocker arm is connected to the crankshaft by rigid bolts. Disassembly requires disassembling the surrounding components layer by layer. When vulnerable parts such as rocker arms and bearings wear out, the entire crankshaft assembly needs to be disassembled, which leads to extended equipment downtime and affects production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a detachable crankshaft swing arm assembly to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a detachable crankshaft swing arm assembly, including a frame housing and a top cover, wherein a disassembly mechanism is provided on the frame housing and the top cover, and a crankshaft swing arm mechanism is provided on the frame housing;

[0006] The disassembly mechanism includes a long slot, which is formed around the front of the frame housing. Long blocks are fixedly connected to the back of the top cover around the perimeter. Limiting slots are formed inside the long blocks, and limiting blocks are inserted into the limiting slots. Connecting plates are fixedly connected to the two limiting blocks on the side away from the frame housing. Rectangular slots are formed on the front and rear sides of the connecting plates. Connecting seats are fixedly connected to the left and right sides of the frame housing. Bolts are threadedly connected to the connecting seats and the connecting plates.

[0007] Preferably, there are four long blocks and four long slots, with the front of each long slot being open, and the four long blocks being inserted into the surfaces of the four long blocks and the interiors of the four long slots.

[0008] Preferably, the number of the limiting grooves is four, and they are arranged in pairs, with the openings of the limiting grooves on the left and right sides corresponding to each other.

[0009] Preferably, the left and right sides of the frame housing are provided with through slots, and the surface of the limiting block is inserted through the through slots provided inside the frame housing.

[0010] Preferably, there are four rectangular slots and four connecting seats, with the outer sides, top, and bottom of the front and rear two rectangular slots being set as openings, and the surface of the connecting seat being inserted into the inside of the rectangular slot.

[0011] Preferably, the crankshaft rocker arm mechanism includes a deep groove ball bearing and a piston cylinder. The piston cylinder is fixedly connected to the front and rear sides of the frame housing. A crankshaft is mounted on the deep groove ball bearing, and a rocker arm is mounted on the crankshaft. A piston is hinged to one end of the rocker arm. The piston and the piston cylinder are slidably connected inside each other. Screws are threadedly connected to the inside of each pair of rocker arms.

[0012] Compared with the prior art, the present invention provides a detachable crankshaft swing arm assembly, which has the following advantages:

[0013] 1. The detachable crankshaft rocker arm assembly, through the disassembly mechanism, after the bolt threads are removed, the connecting plate is pulled to drive the limiting block out of the limiting groove, and at the same time the connecting seat can also be taken out of the rectangular groove. Then the top cover can be pulled to drive the long block out of the long groove, which makes it easy to take the top cover out from the top of the frame housing, and facilitates the disassembly of the crankshaft rocker arm mechanism.

[0014] 2. This detachable crankshaft swing arm assembly, with its crankshaft designed as a parallel four-cylinder, offers the following advantages due to its 100° rotating body: small size and light weight; enhanced durability and stability. Traditional crankshafts have a 100° rotating body, while this crankshaft has a 100° rotating body, resulting in faster increments and greater boost pressure. Equipped with specially designed swing arms, bearings, pistons, piston cylinders, and copper bearings, it offers advantages such as convenient disassembly and assembly and low maintenance costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the disassembly mechanism;

[0018] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0019] Figure 4 This is a schematic diagram of the crankshaft swing arm mechanism;

[0020] Figure 5 This is a partial structural diagram of the crankshaft swing arm mechanism;

[0021] Figure 6 This is a schematic diagram of the crankshaft structure;

[0022] Figure 7 This is a schematic diagram of the piston structure.

[0023] In the diagram: 1. Frame housing; 2. Top cover; 3. Disassembly mechanism; 31. Connecting seat; 32. Bolt; 33. Rectangular groove; 34. Connecting plate; 35. Limiting block; 36. Long block; 37. Long groove; 38. Limiting groove; 4. Crankshaft rocker arm mechanism; 41. Piston cylinder; 42. Piston; 43. Rocker arm; 44. Crankshaft; 45. Deep groove ball bearing; 46. Screw. Detailed Implementation

[0024] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] This utility model provides the following technical solution: Example

[0027] Combination Figures 1 to 3 The detachable crankshaft swing arm assembly includes a frame housing 1 and a top cover 2. The frame housing 1 and the top cover 2 are provided with a disassembly mechanism 3, and the frame housing 1 is provided with a crankshaft swing arm mechanism 4.

[0028] The disassembly mechanism 3 includes a long slot 37, which is opened around the front of the frame housing 1. Long blocks 36 are fixedly connected around the back of the top cover 2. Limiting slots 38 are opened inside the long blocks 36. Limiting blocks 35 are inserted into the limiting slots 38. Connecting plates 34 are fixedly connected to the side of the front and rear limiting blocks 35 away from the frame housing 1. Rectangular slots 33 are opened on the front and rear sides of the connecting plates 34. Connecting seats 31 are fixedly connected to the left and right sides of the frame housing 1. Bolts 32 are threadedly connected to the connecting seats 31 and the connecting plates 34.

[0029] There are four long blocks 36 and four long slots 37. The front of the long slots 37 is open. The surfaces of the four long blocks 36 and the interiors of the four long slots 37 are inserted into each other. There are four limiting slots 38, which are in pairs. The openings of the limiting slots 38 on the left and right sides are corresponding to each other. Through slots are opened inside the left and right sides of the frame housing 1. The surface of the limiting block 35 is inserted into the through slot opened inside the frame housing 1. There are four rectangular slots 33 and four connecting seats 31. The outer side, top and bottom of the front and rear rectangular slots 33 are open. The surface of the connecting seat 31 is inserted into the interior of the rectangular slots 33.

[0030] Furthermore, after the bolt 32 is unthreaded, the connecting plate 34 is pulled to remove the limiting block 35 from the limiting groove 38. At the same time, the connecting seat 31 can also be removed from the rectangular groove 33. Then, the top cover 2 can be pulled to remove the long block 36 from the long groove 37, making it easy to remove the top cover 2 from the top of the frame housing 1, which facilitates the disassembly of the crankshaft swing arm mechanism 4. Example

[0031] See Figure 1-7 Furthermore, based on Embodiment 1, the crankshaft rocker arm mechanism 4 is further provided, which includes a deep groove ball bearing 45 and a piston cylinder 41. The piston cylinder 41 is fixedly connected to the front and rear sides of the frame housing 1. A crankshaft 44 is provided on the deep groove ball bearing 45. A rocker arm 43 is provided on the crankshaft 44. A piston 42 is hinged to one end of the rocker arm 43. The piston 42 and the piston cylinder 41 are slidably connected inside each other. Screws 46 are threadedly connected inside each rocker arm 43.

[0032] Furthermore, the crankshaft 44 is designed as a parallel four-cylinder, and its 90-degree rotating body has the following advantages: small size and light weight; enhanced durability and smoothness. The traditional crankshaft 44 has a 180-degree rotating body, while this crankshaft 44 has a 90-degree rotating body, which is faster and has greater boost pressure than the traditional one. With specially designed swing arms, bearings, pistons, piston cylinders, and copper bearings, it is easy to disassemble and assemble, and has low maintenance costs.

[0033] In actual operation, when this device is in use, the low-temperature servo motor drives the crankshaft 44 to rotate. The two ends of the crankshaft 44 are fixed to the frame housing 1 by deep groove ball bearings 45: the outer ring of the deep groove ball bearing 45 is interference-fitted with the bearing seat of the frame housing 1, and the inner ring is transition-fitted with the journal of the crankshaft 44, supporting the crankshaft 44 to rotate at high speed (speed ≤3000rpm), with radial runout ≤0.03mm;

[0034] The inner ring of the deep groove ball bearing 45 rotates with the crankshaft 44, while the outer ring is fixed to the frame housing 1. Lithium-based grease is used to reduce friction and ensure a transmission efficiency of ≥95%. When the crankshaft 44 rotates, the rocker arm 43 reciprocates through a double-cone positioning structure: the journal of the crankshaft 44 has a 1:50 taper positioning surface, and the inner tapered hole of the rocker arm 43 is pre-tightened to the crankshaft 44 by a Φ8mm elastic steel ball and a disc spring (pre-tightening force 15-20N) to achieve circumferential positioning; the outer T-shaped slider of the rocker arm 43 slides in the T-shaped groove of the crankshaft 44 (tolerance H7 / g6), converting the rotational motion of the crankshaft 44 into the radial swing of the rocker arm 43, with an swing angle range of 0°~45°; the end of the rocker arm 43 is hinged to the connecting rod of the piston 42 through a pin, driving the piston 42 to reciprocate within the piston cylinder 41.

[0035] When the swing arm 43 swings, the connecting rod converts the rotational motion into the linear motion of the piston 42, with a stroke of 10-20mm. A ball joint is provided at the connection between the connecting rod and the piston 42 to compensate for the angular deviation when the swing arm 43 swings, ensuring that the straightness of the piston motion is ≤0.05mm / 100mm. The reciprocating motion of the piston 42 in the piston cylinder 41 achieves medium pressurization: when the piston 42 moves forward, the O-ring fluororubber seal forms a sealed cavity, forcing the medium out through the one-way valve (pressure ≤10MPa); when the piston 42 moves backward, the cavity draws in the medium under negative pressure, completing the pressurization cycle. The eight piston cylinders 41 are evenly distributed along the crankshaft 44 axially, and pressure pulsation is suppressed by the cam group angle design (one every 90°).

[0036] The copper bushing is embedded in the bearing housing and has an interference fit with the crankshaft journal (0.01-0.03mm). The inner surface oil groove ensures uniform lubrication. When the wear exceeds 0.1mm, it can be replaced separately, and the cost is only 30% of the cost of the whole bearing.

[0037] After the bolt 32 is removed from the thread, the connecting plate 34 is pulled to remove the limiting block 35 from the limiting groove 38. At the same time, the connecting seat 31 can also be removed from the rectangular groove 33. Then, the top cover 2 can be pulled to remove the long block 36 from the long groove 37, making it easy to remove the top cover 2 from the top of the frame housing 1, which facilitates the disassembly of the crankshaft swing arm mechanism 4.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A detachable crankshaft swing arm assembly, comprising a frame housing (1) and a top cover (2), characterized in that: The frame housing (1) and top cover (2) are provided with a disassembly mechanism (3), and the frame housing (1) is provided with a crankshaft swing arm mechanism (4). The disassembly mechanism (3) includes a long groove (37), which is opened around the front of the frame housing (1). Long blocks (36) are fixedly connected around the back of the top cover (2). A limiting groove (38) is opened inside the long block (36). A limiting block (35) is inserted into the limiting groove (38). A connecting plate (34) is fixedly connected to the front and rear two limiting blocks (35) away from the frame housing (1). A rectangular groove (33) is opened on the front and rear sides of the connecting plate (34). A connecting seat (31) is fixedly connected to the left and right sides of the frame housing (1). Bolts (32) are threadedly connected to the connecting seat (31) and the connecting plate (34).

2. The detachable crankshaft swing arm assembly according to claim 1, characterized in that: The number of the long blocks (36) and the long slots (37) are four each. The front of the long slots (37) is set to be open, and the four long blocks (36) are inserted into the surface and the four long slots (37).

3. The detachable crankshaft swing arm assembly according to claim 1, characterized in that: The number of the limiting grooves (38) is four, and they are in pairs. The openings of the limiting grooves (38) on the left and right sides are corresponding to each other.

4. The detachable crankshaft swing arm assembly according to claim 1, characterized in that: The frame housing (1) has through slots on the left and right sides, and the limiting block (35) is inserted through the through slots on the surface of the frame housing (1).

5. The detachable crankshaft swing arm assembly according to claim 1, characterized in that: The rectangular slots (33) and connectors (31) are four in number. The outer side, top and bottom of the two rectangular slots (33) are set as openings. The surface of the connector (31) is inserted into the inside of the rectangular slots (33).

6. The detachable crankshaft swing arm assembly according to claim 1, characterized in that: The crankshaft rocker arm mechanism (4) includes a deep groove ball bearing (45) and a piston cylinder (41). The piston cylinder (41) is fixedly connected to the front and rear sides of the frame housing (1). A crankshaft (44) is provided on the deep groove ball bearing (45). A rocker arm (43) is provided on the crankshaft (44). A piston (42) is hinged to one end of the rocker arm (43). The piston (42) and the piston cylinder (41) are slidably connected. Screws (46) are threadedly connected to the inside of each rocker arm (43).

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