A piston guide arrangement

Abstract

The application discloses a piston guiding device and relates to the technical field of piston assembly, which comprises a piston and a connecting rod, a piston guide barrel for defining the piston, a guide mechanism arranged on the piston guide barrel for guiding the insertion of the connecting rod, and rotating parts with adjustable spacing arranged oppositely; a guide barrel cover plate in clamping cooperation with the piston guide barrel, and a piston assembly rod slidingly inserted into the guide barrel cover plate. In the piston guiding device, the guide barrel cover plate fixes the position of the piston assembly rod, the piston assembly rod is guided and stabilized during the advancement of the piston, the piston is not prone to be stuck, the pressing of the rotating parts on the connecting rod can stabilize the clamping of the connecting rod, the insertion of the connecting rod is more stable, the pressure of the rotating parts on both sides of the connecting rod is equal, the rotating parts always move along the axis of the piston during the insertion of the rotating parts, and the centering effect is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of piston assembly, in particular to a piston guiding device. BACKGROUND

[0002] The piston is generally assembled with the piston ring and the connecting rod to form a piston connecting rod assembly, and then the piston connecting rod assembly is reversely assembled from the cylinder hole at the top surface of the engine block, with the connecting rod facing the inner cavity of the engine block. This process may cause assembly difficulties such as piston ring jamming if not properly operated.

[0003] In combination with the patent with the publication number (announcement number) CN208034557U, the publication date (announcement date) 2018-11-02, a piston connecting rod assembly guiding tool is disclosed, which comprises a guiding tool fixing seat and a guide rod. The guide rod is two, which are respectively sleeved into the two ends of the lower part of the guiding tool fixing seat. The flange surface of the connecting rod is attached to the upper part of the guiding tool fixing seat and slowly passes into the guide rod.

[0004] However, in the prior art including the above-mentioned patent, the guide rod can only ensure that the connecting rod will not bump the crankshaft neck, but cannot guide the assembly of the connecting rod and the piston, and lacks clamping of the connecting rod during the assembly process. SUMMARY

[0005] The purpose of the present application is to provide a piston guiding device to solve the above-mentioned problems.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a piston guiding device, comprising a piston and a connecting rod, comprising a piston guiding cylinder for limiting the piston, a guiding mechanism for guiding the insertion of the connecting rod is arranged on the piston guiding cylinder, and the guiding mechanism comprises rotating members which are arranged in opposite directions and have adjustable spacing;

[0007] A guiding cylinder cover plate is clamped with the piston guiding cylinder, and a piston assembly rod is slidably inserted into the guiding cylinder cover plate;

[0008] Among them, the rotating member has a pressing position under the activity stroke of the connecting rod, and the spacing of the two rotating members at the pressing position is consistent with the thickness of the connecting rod.

[0009] As a preferred, it further comprises a transmission ring arranged on the rotating member, and the first friction force when the transmission ring is tangent to the connecting rod is greater than the second friction force between the transmission ring and the rotating member.

[0010] As a preferred, a rotating rod is arranged in the piston guiding cylinder for tightly abutting the rotating members.

[0011] As a preferred, a plurality of teeth are arranged in a circumferential array on the transmission ring, and an intermediate gear is arranged at the end of the rotating rod in a rotating manner and is in meshing transmission with the teeth.

[0012] As preferred, a sleeve hook is further included, which is arranged in a circumferential array at the port of the piston guide cylinder and is used to hook the piston ring, and is driven to deflect to form a guide surface pointing to the piston.

[0013] As preferred, a sliding seat is further included, which is slidingly arranged on the piston guide cylinder, and the sleeve hook is rotatably arranged in the sliding seat, and a trigger station is present in the active stroke of the sliding seat to deflect the sleeve hook.

[0014] As preferred, a transmission belt is arranged on the intermediate gear to drive the sliding seat.

[0015] As preferred, a pressing rod is rotatably arranged in the sliding seat, and a first torsion spring is arranged on the pressing rod, and the sleeve hook is slidingly arranged at the end of the pressing rod, and an elastic member is arranged on the sleeve hook to extend to the sidewall of the piston.

[0016] As preferred, a pull rope is arranged on the sliding seat to pull back the sleeve hook.

[0017] As preferred, a sliding rod is slidingly arranged on the sliding seat along the length direction to tension the pull rope, and the pressing rod and the sliding rod are slidingly matched through a key groove.

[0018] In the above technical solution, the piston guide device provided by the application has the following beneficial effects: the guide cylinder cover plate fixes the position of the piston assembly rod, the piston assembly rod is guided and stabilized during the advancement of the piston, the piston is not prone to be stuck, the pressing of the rotating member on the connecting rod can stabilize the clamping of the connecting rod, the insertion of the connecting rod is more stable, and the pressure on both sides of the connecting rod is equal, so that the rotating member always moves along the axis of the piston during the insertion, thereby playing a centering role. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0020] Figure 1 The overall three-dimensional schematic diagram provided by the embodiment of the present application;

[0021] Figure 2 The piston guide cylinder and the piston assembly schematic diagram provided by the embodiment of the present application;

[0022] Figure 3 The internal structure schematic diagram of the piston guide cylinder provided by the embodiment of the present application;

[0023] Figure 4A guiding mechanism structure schematic view provided for the embodiment of the present application;

[0024] Figure 5 A sleeve hook and a pressing rod internal structure schematic view provided for the embodiment of the present application;

[0025] Figure 6 A pressing rod and an arc groove structure schematic view provided for the embodiment of the present application;

[0026] Figure 7 A first gear and a second gear plane structure schematic view provided for the embodiment of the present application;

[0027] Figure 8 A rotating member plane structure schematic view provided for the embodiment of the present application.

[0028] Legend of reference signs:

[0029] 1, piston guide cylinder; 11, positioning seat; 12, through hole seat; 13, sliding groove; 2, guide cylinder cover plate; 3, piston assembly rod; 4, insertion hole; 5, connecting rod; 6, piston; 7, sleeve hook; 71, cable; 72, sliding rod; 73, elastic member; 74, arc groove; 75, pulling part; 76, fixing seat; 8, sliding seat; 81, transmission belt; 82, rotating rod; 821, second torsional spring; 83, intermediate gear; 84, pressing rod; 841, adapter block; 85, first torsional spring; 9, rotating member; 91, first gear; 92, transmission ring; 93, spring; 94, second gear. DETAILED DESCRIPTION

[0030] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0031] As shown in Figures 1-8 A piston guiding device, comprising a piston 6 and a connecting rod 5, characterized in that it comprises a piston guide cylinder 1 for defining the piston 6, a guiding mechanism is arranged on the piston guide cylinder 1 for guiding the insertion of the connecting rod 5, and the guiding mechanism comprises rotating members 9 arranged oppositely and with adjustable spacing;

[0032] A guide cylinder cover plate 2 is in clamping cooperation with the piston guide cylinder 1, and a piston assembly rod 3 is slidably inserted into the guide cylinder cover plate 2;

[0033] The rotating members 9 have a pressing position under the active stroke of the connecting rod 5, and the spacing of the two rotating members 9 at the pressing position is consistent with the thickness of the connecting rod 5.

[0034] Specifically, the piston guide cylinder 1 is circumferentially arrayed with positioning seats 11 for limiting the piston 6, further comprising a through hole seat 12, the through hole seat 12 is provided with an insertion hole 4 for guiding the insertion of a pin of the piston 6, and the piston guide cylinder 1 is further provided with a sliding groove 13.

[0035] Further, in the assembly of the piston connecting rod assembly, first, the top surface of the piston 6 is directed towards the piston assembly rod 3, the connecting end of the connecting rod 5 is inserted towards the piston 6, and then the piston guide cylinder cover plate 2 is covered. During the assembly process, one hand holds the piston guide cylinder 1, and the other hand pushes the piston assembly rod 3 forward. The piston assembly rod is made of rubber plastic material to avoid damaging the piston. The piston guide cylinder cover plate 2 has a boss to fix the position of the piston assembly rod 3. During the pushing process of the piston 6, the piston assembly rod 3 is guided and stable, and the piston 6 is not easy to be stuck.

[0036] Furthermore, springs 93 are arranged between the rotating members 9 to make the two rotating members 9 close to each other. The rotating members 9 are eccentric wheels, and first and second gears 91 and 94 are arranged on the two rotating members 9 respectively. The rotation shafts of the first and second gears 91 and 94 are in sliding connection with the sliding groove 13, and the first and second gears 91 and 94 are in meshing and synchronous rotation with each other. During the insertion process of the connecting rod 5 towards the piston 6, the connecting rod 5 moves between the two rotating members 9 and pushes the rotating members 9 to deflect. Since the rotating members 9 are eccentric wheels, the distance between the rotating members 9 changes constantly during the deflection process, until the connecting rod 5 can pass through between the two rotating members 9. At this time, the distance between the rotating members 9 is consistent with the thickness of the connecting rod 5, which is the pressing position of the rotating members 9, and can play a role in stably clamping the connecting rod 5, so that the insertion of the connecting rod 5 is more stable. And due to the arrangement of the first and second gears 91 and 94, the two rotating members 9 always remain consistent. At this time, the pressure of the rotating members 9 on both sides of the connecting rod 5 is equal, so that the rotating members 9 always move along the axis of the piston 6 during the insertion process, playing a role in centering. Then the plug is inserted into the insertion hole 4, and the assembly is completed. After the assembly is completed, first, the piston guide cylinder cover plate 2 and the piston assembly rod 3 are pulled out, and then the first and second gears 91 and 94 are moved away from each other along the sliding groove 13. The elastic force of the spring 93 is manually overcome, so that a gap is formed between the two gears to allow the connecting rod to pass through. Then the piston 6 and the connecting rod 5 are pulled out.

[0037] In the above technology, the piston guide cylinder cover plate 2 fixes the position of the piston assembly rod 3, and the piston assembly rod 3 is guided and stable during the pushing process of the piston 6, so that the piston 6 is not easy to be stuck. Moreover, the pressing of the rotating members 9 on the connecting rod 5 can play a role in stably clamping the connecting rod 5, so that the insertion of the connecting rod 5 is more stable. In addition, the pressure of the rotating members 9 on both sides of the connecting rod 5 is equal, so that the rotating members 9 always move along the axis of the piston 6 during the insertion process, playing a role in centering.

[0038] As a further embodiment of the present application, a transmission ring 92 is arranged on the rotating member 9, and the first friction force when the transmission ring 92 is tangent to the connecting rod 5 is greater than the second friction force between the transmission ring 92 and the rotating member 9.

[0039] Specifically, when the connecting rod 5 starts to be inserted, due to the first friction being greater than the second friction, the connecting rod 5 first contacts the transmission ring 92 tangentially and drives the transmission ring 92 to rotate, at the same time, the connecting rod 5 pushes the rotating part 9 to deflect, at this time, the second friction generates a resistance to the connecting rod 5 in the opposite direction of the insertion direction, which plays a damping role, so that the insertion path of the connecting rod 5 is stable.

[0040] As a further provided embodiment of the present application, the rotating rod 82 is arranged in the piston guide sleeve 1 to make the rotating parts 9 close to each other.

[0041] Specifically, the rotating rod 82 is provided with a second torsional spring 821, which drives both rotating rods 82 to rotate towards the axis of the piston guide sleeve 1, so that the end of the rotating rod 82 abuts against the rotating part 9, that is, the abutting position changes with the rotation of the rotating part 9, and the second torsional spring 821 can be self-adapted to adjust, so that the two rotating parts 9 abut against each other through the support of the rotating rod 82, and can actively adapt to connecting rods 82 of different thicknesses, which is more practical.

[0042] As a further provided embodiment of the present application, the transmission ring 92 is circumferentially arranged with a plurality of teeth, and the end of the rotating rod 82 is rotationally arranged with an intermediate gear 83 which is in meshing transmission with the teeth.

[0043] Specifically, the transmission ring 92 drives the intermediate gear 83 to abut against the rotating part 9, and makes the intermediate gear 83 mesh with the transmission ring 92, so that the cooperation between the intermediate gear 83 and the rotating part 9 is more compact, and there is no gap with the eccentric rotation of the rotating part 9, so that the rotating part 9 automatically adapts to connecting rods 82 of different thicknesses.

[0044] As a further provided embodiment of the present application, it further includes a sleeve hook 7 which is circumferentially arranged at the port of the piston guide sleeve 1 and is used to hang the piston ring, and is driven to deflect to form a guide surface pointing to the piston 6.

[0045] Specifically, the sleeve hook 7 is provided with a recess for hanging the piston ring. The piston ring is sleeved on the sleeve hook 7, at this time, the sleeve hook 7 is slightly inclined and the tip points to the axis of the piston guide sleeve 1, and the piston ring is sleeved into the recess along the tip, at this time, the piston ring is not expanded. After the assembly is completed, continue to move the connecting rod 5 towards the piston 6, the connecting rod 5 pushes the piston 6 until the piston 6 is separated from the piston guide sleeve 1, the end of the piston 6 abuts against a plurality of sleeve hooks 7, so that the sleeve hooks 7 deflect and expand the piston ring, continue to push the piston 6 until the recess on the outer wall of the piston 6 corresponds to the piston ring, then the sleeve hook 7 can be manually rotated or driven by a motor to deflect, so that the tip of the sleeve hook 7 points to the recess, at this time, the recess to the tip forms an inclined guide surface, due to the contraction tendency of the piston ring under its own elasticity, the piston ring slides along the guide surface to the recess, so as to be sleeved in the recess, completing the sleeving of the piston ring.

[0046] As a further provided embodiment of the present application, the sliding seat 8 is slidably arranged on the piston guide cylinder 1, and the sleeve hook 7 is rotatably arranged in the sliding seat 8, and a trigger position is arranged in the moving stroke of the sliding seat 8 to deflect the sleeve hook 7.

[0047] Specifically, the position of the piston 6 is the first end of the piston guide cylinder 1, and the second end is opposite to the first end, and the sliding seat 8 is initially arranged at the first end of the piston guide cylinder 1. The sliding seat 8 can be slid from the first end to the second end by manual sliding, and the sleeve hook 7 and the piston ring sleeved on the sleeve hook 7 are synchronously moved until the piston ring is moved to the groove on the piston 6, that is, the trigger position. A switch can be arranged at the trigger position to drive the motor to start, so that the motor drives the sleeve hook 7 to deflect, or a key groove is arranged at the corresponding position of the sleeve hook 7 to guide the sleeve hook 7 to deflect when the sliding seat 8 reaches the trigger position.

[0048] As a further provided embodiment of the present application, the intermediate gear 83 is provided with a transmission belt 81 for pulling the sliding seat 8.

[0049] Specifically, the transmission belt 81 is wound on the intermediate gear 83, and the two ends of the transmission belt 81 are connected to different ends of the sliding seat 8, respectively. When the connecting rod 5 is inserted, the connecting rod 5 drives the transmission ring 92 to rotate, and the transmission ring 92 drives the intermediate gear 83 to rotate through gear meshing, so as to drive the transmission belt 81 to move. Figure 4 In the state, the transmission belt 81 pulls the sliding seat 8 to displace along the first end of the piston guide cylinder 1 to the second end, so that the sliding seat 8 automatically reaches the trigger position when the connecting rod 5 is inserted, without the need for other power sources, thereby saving costs.

[0050] As a further provided embodiment of the present application, the sliding seat 8 is rotatably arranged with a pressing rod 84, and the pressing rod 84 is provided with a first torsional spring 85, the sleeve hook 7 is slidably arranged at the end of the pressing rod 84, and the sleeve hook 7 is provided with an elastic member 73 for extending the sleeve hook 7 to the side wall of the piston 6.

[0051] Specifically, the first torsional spring 85 drives the pressing rod 84 to tilt towards the axial direction by default, and the elastic member 73 drives the sleeve hook 7 to abut against the side wall of the piston 6. When the sliding seat 8 slides from the first end to the second end, the sharp end moves along the side wall of the piston 6, and when the sharp end moves to the groove, it is not pressed by the side wall. The sharp end enters the groove and deflects the sleeve hook 7 automatically, and the piston ring on the sleeve hook 7 enters the groove. Then the sliding seat 8 continues to move and drives the sleeve hook 7 to recover, and when the sliding seat 8 slides from the second end to the first end, the sharp end of the sleeve hook 7 abuts against the outer wall of the piston ring and deflects under the guidance of the surface of the outer wall of the piston ring, so as to avoid the interference of the sleeve hook 7 with the piston 6.

[0052] As a further provided embodiment of the present application, the sliding seat 8 is provided with a pull cable 71 for pulling the sleeve hook 7 to retract.

[0053] Specifically, the fixed seat 76 is arranged in the pressing rod 84 in a sliding manner, the elastic member 73 is used for pushing the fixed seat 76 to extend outward, the sleeve hook 7 is arranged on the fixed seat 76 in a rotating manner, the pulling part 75 for fixing the cable 71 is arranged on the sleeve hook 7, the pulling force of the cable 71 on the pulling part 75 drives the sleeve hook 7 to deflect away from the shaft center, and the matching block 841 is arranged on the pressing rod 81. When the piston guide cylinder 1 is not inserted with the piston 6, the sliding seat 8, the pressing rod 84 and the sleeve hook 7 are located at the first end of the piston guide cylinder 1, the elastic member 73 pushes the fixed seat 76 to extend outward, so that the connecting part of the fixed seat 76 and the rotating shaft of the sleeve hook 7 is located outside the port of the pressing rod 84, the cable 71 applies the pulling force to the pulling part 75, so that the sleeve hook 7 deflects away from the shaft center, and the inner side of the plurality of sleeve hooks 7 is an inclined surface that faces the shaft center, as shown in the state of FIG. 8, when the piston 6 is inserted, the edge of the piston 6 will abut against the inclined surface, so as to automatically correct the deflection state of the piston 6, and the piston 6 can be inserted in a coaxial state with the piston guide cylinder 1 through the inclined surface. Figure 5

[0054] Further, the piston 6 will first abut against the matching block 841, so that the matching block 841 deflects to abut against the outer wall of the piston 6, thereby correcting the angle of the pressing rod 84, so that the pressing rod 84 can abut against the outer wall of the piston 6. Meanwhile, the sliding rod 72 for tensioning the cable 71 is arranged on the sliding seat 8 in a sliding manner along the length direction, the arc groove 74 is arranged on the sleeve hook 7 in a sliding manner, and the arc groove 74 is in sliding cooperation with the sliding rod 72. The sleeve hook 7 drives the arc groove 74 to deflect in the deflection process, the arc groove 74 presses the sliding rod 72, so that the sliding rod 72 slides along the length direction of the sliding seat 8, the cable 71 is wound on the sliding rod 72, the sliding rod 72 drives the cable 71 to be tensioned in the sliding process, the cable 71 pulls the sleeve hook 7, so that the sleeve hook 7 is retracted into the pressing rod 84. At this time, the rotating shaft of the sleeve hook 7 is retracted into the pressing rod 84, so that the sleeve hook 7 is blocked by the port of the pressing rod 84, and the rotation of the sleeve hook 7 is limited by the pressing rod 84, as shown in the state of FIG. 9. The sleeve hook 7 is deflected away from the shaft center to the state of facing the shaft center, so as to facilitate the sleeve hook 7 to be sleeved with the piston ring. Figure 6

[0055] In the sliding process of the sliding seat 8, the tip of the sleeve hook 7 moves along the outer wall of the piston 6, when the sleeve hook 7 enters the groove, the sleeve hook 7 deflects, and the arc groove 74 presses the sliding rod 72 again, the sliding rod 72 slides along the length direction of the sliding seat 8 and pulls the cable 71, so that the sleeve hook 7 is completely retracted into the pressing rod 84 and separated from the piston ring, so that the piston ring is automatically wound in the groove.

[0056] ​​The foregoing merely illustrates some exemplary embodiments of the application, and it will be appreciated that those skilled in the art will be able to devise various modifications without departing from the spirit and scope of the application. The appended drawings and description are illustrative only, and are not intended to be limiting.

Claims

1. A piston guiding device, comprising a piston (6) and a connecting rod (5), characterized in that, It includes a piston guide cylinder (1) for defining the piston (6), which is provided with a guide mechanism for guiding the connecting rod (5) to be inserted, and the guide mechanism includes a rotating member (9) that is rotatably arranged and has an adjustable spacing. A guide tube cover plate (2) is snapped into the piston guide tube (1), and a piston assembly rod (3) is slidably inserted on it. Among them, the rotating part (9) has a pressing position under the active stroke of the connecting rod (5), and the distance between the two rotating parts (9) at the pressing position is consistent with the thickness of the connecting rod (5); It also includes a transmission ring (92) disposed on the rotating part (9), and the first frictional force when the transmission ring (92) is tangent to the connecting rod (5) is greater than the second frictional force between the transmission ring (92) and the rotating part (9); The piston guide cylinder (1) is rotatably provided with a rotating rod (82) for making the rotating parts (9) fit tightly against each other.

2. The piston guiding device according to claim 1, characterized in that, The transmission ring (92) is provided with a circumferential array of multiple teeth, and the end of the rotating rod (82) is provided with an intermediate gear (83) that meshes with the teeth for transmission.

3. A piston guiding device according to claim 2, characterized in that, It also includes a circumferential array of hooks (7) arranged at the port of the piston guide cylinder (1) and used to attach piston rings, which are driven to deflect to form a guide surface pointing towards the piston (6).

4. A piston guiding device according to claim 3, characterized in that, It also includes a slide block (8) that is slidably disposed on the piston guide cylinder (1), the hook (7) being rotatably disposed in the slide block (8), and there is a triggering position in the active stroke of the slide block (8) to deflect the hook (7).

5. A piston guiding device according to claim 4, characterized in that, The intermediate gear (83) is provided with a transmission belt (81) for traction of the slide (8).

6. A piston guiding device according to claim 4, characterized in that, The slide (8) is rotatably provided with a pressing rod (84), and a first torsion spring (85) is provided on the pressing rod (84). The hook (7) is slidably provided at the end of the pressing rod (84), and an elastic element (73) is provided on the hook (7) for extending the hook (7) toward the side wall of the piston (6).

7. A piston guiding device according to claim 6, characterized in that, The slide (8) is provided with a cable (71) for pulling the hook (7) back.

8. A piston guiding device according to claim 7, characterized in that, The slide block (8) is slidably provided with a slide rod (72) for tensioning the cable (71) along the length direction, and the pressure rod (84) and the slide rod (72) are kept in sliding fit through a keyway.

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