A crankshaft front and rear oil seal press-fitting device and engine assembly production line

Abstract

The present invention discloses a crankshaft front and rear oil seal press-fitting device and an engine assembly production line, wherein the crankshaft front and rear oil seal press-fitting device comprises a fixed crossbeam, a lifting mechanism and two oil seal pressure head structures, wherein the fixed crossbeam has a press-fitting station, the lifting mechanism is arranged below the fixed crossbeam to carry the engine cylinder body and to lift the engine cylinder body to the press-fitting station, the two oil seal pressure head structures are respectively used to place the front oil seal and the rear oil seal, and the two oil seal pressure head structures are arranged at the front and rear sides of the press-fitting station and are both movable in the front and rear directions, so that each of the oil seal pressure head structures has a starting position away from the press-fitting station and a press-fitting position close to the press-fitting station. The crankshaft front and rear oil seal press-fitting device provided by the present invention realizes the simultaneous press-fitting of the front oil seal and the rear oil seal, thereby improving the press-fitting efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of engine assembly, and in particular to a crankshaft front and rear oil seal press-assembly device and an engine assembly production line. Background Art

[0002] The crankshaft is the core moving part of the engine. It runs through the timing end and the flywheel end of the engine cylinder block. A sealed crankcase needs to be formed inside the cylinder block. Oil seals are needed to seal the crankshaft and the joint surfaces of the cylinder block timing and flywheel ends. The oil seal that seals the timing end face is called the crankshaft front oil seal, and the oil seal that seals the flywheel end face is called the crankshaft rear oil seal. In order to better seal the oil seal on the engine cylinder block, a press-fitting method is required. At present, different manual press-fitting tools are used for the crankshaft front oil seal and the crankshaft rear oil seal, and two press-fitting operations are performed front and back, which requires two operations and has low press-fitting efficiency. Summary of the invention

[0003] The main purpose of the present invention is to propose a crankshaft front and rear oil seal pressing device and an engine assembly production line, aiming to solve the problem in the prior art that the crankshaft front oil seal and the crankshaft rear oil seal respectively use different manual pressing tools, and perform two pressing operations front and back, which requires two operations and has low pressing efficiency.

[0004] In order to achieve the above-mentioned object, the present invention proposes a crankshaft front and rear oil seal press-fitting device, which is used to press-fit the front oil seal and the rear oil seal on the engine cylinder block, wherein the upper end of the engine cylinder block is formed with a plurality of positioning pin holes, and the crankshaft front and rear oil seal press-fitting device comprises:

[0005] Fixed crossbeam with press-fitting station;

[0006] A lifting mechanism is arranged below the fixed crossbeam, and is used to carry the engine cylinder block and lift the engine cylinder block to the press-fitting station; and

[0007] Two oil seal pressure head structures, respectively used to place a front oil seal and a rear oil seal, the two oil seal pressure head structures are respectively arranged at the front and rear sides of the press-fitting station and are both movably arranged in the front-to-back direction, so that each of the oil seal pressure head structures has a starting position away from the press-fitting station and a press-fitting position close to the press-fitting station;

[0008] Wherein, when the lifting mechanism lifts the engine cylinder block to the pressing station, the two oil seal pressing head structures are respectively moved from the starting position to the pressing position, so as to press the front oil seal and the rear oil seal on the two oil seal pressing head structures onto the engine cylinder block accordingly.

[0009] Optionally, the fixed crossbeam is provided with a slide rail extending in the front-rear direction;

[0010] The two oil seal pressure head structures are both connected to a sliding seat that is slidably matched with the sliding rail.

[0011] Optionally, a slide drive is further included, and the slide drive is used to drive the slide to slide on the slide rail.

[0012] Optionally, a guide hole is provided at the opposite ends of the two slide seats;

[0013] A guide shaft is arranged between the two slide seats. The guide shaft extends in the front-rear direction, and two ends of the guide shaft are respectively passed through the two guide holes.

[0014] Optionally, a limit sensor is provided in the middle of the guide shaft.

[0015] Optionally, a positioning pin is provided on the fixed crossbeam, and the positioning pin is used to be inserted into a positioning pin hole of the engine cylinder body when the lifting mechanism lifts the engine cylinder body to the pressing station, so as to position the engine cylinder body at the pressing station.

[0016] Optionally, a plurality of the locating pins are provided, and the plurality of the locating pins are used to correspond one-to-one with a plurality of locating pin holes of the engine cylinder block.

[0017] Optionally, the fixed crossbeam includes a beam body, a connecting arm protruding downward from the beam body, and a positioning plate provided at the lower end of the connecting arm;

[0018] The positioning pin is protrudingly arranged on the lower end surface of the positioning plate.

[0019] Optionally, the lifting mechanism comprises:

[0020] A cylinder tray for carrying the engine cylinder, the cylinder tray is disposed below the fixed crossbeam and is movable in the vertical direction, so as to have a first position where it can move upward to reach the press-fitting station, and a second position where it can move downward to be located below the press-fitting station; and,

[0021] The lifting driving member is used to drive the cylinder tray to move up and down.

[0022] The present invention also provides an engine assembly production line, comprising the crankshaft front and rear oil seal press-fitting device as described above.

[0023] In the technical solution of the present invention, the approximate use process of the crankshaft front and rear oil seal press-fitting device is as follows: first, the engine cylinder body is placed on the jacking mechanism, and then the jacking mechanism lifts the engine cylinder body to the press-fitting station, and then the front oil seal and the rear oil seal are respectively placed on the two oil seal pressure head structures at the starting position, and then the two oil seal pressure head structures are respectively moved from the starting position to the press-fitting position, so as to press the front oil seal and the rear oil seal on the two oil seal pressure head structures onto the engine cylinder body. In the above-mentioned use process, the front oil seal and the rear oil seal are respectively press-fitted onto the engine cylinder body by the two oil seal pressure head structures at the same time, so that the front oil seal and the rear oil seal are press-fitted at the same time, thereby improving the press-fitting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 A schematic structural diagram of an embodiment of a crankshaft front and rear oil seal press-fitting device provided by the present invention;

[0026] Figure 2 for Figure 1 A partial schematic diagram of the front and rear oil seal press-fitting device of the middle crankshaft.

[0027] Description of Figure Numbers:

[0028] Label name Label name 100 Crankshaft front and rear oil seal press device 21 Engine block 1 Fixed beam 22 Cylinder tray 11 Slide rails 23 Lifting drive parts 12 Guide shaft 3 Oil seal head structure 121 Limit sensor 31 Front oil seal 13 Positioning pin 32 Rear oil seal 14 Beam 33 Slide 15 Connecting the arm 331 Guide hole 16 Positioning plate 34 Slide drive 2 Lifting mechanism

[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The crankshaft is the core moving part of the engine. It runs through the timing end and the flywheel end of the engine cylinder block. A sealed crankcase needs to be formed inside the cylinder block. Oil seals are needed to seal the crankshaft and the joint surfaces of the cylinder block timing and flywheel ends. The oil seal that seals the timing end face is called the crankshaft front oil seal, and the oil seal that seals the flywheel end face is called the crankshaft rear oil seal. In order to better seal the oil seal on the engine cylinder block, a press-fitting method is required. At present, different manual press-fitting tools are used for the crankshaft front oil seal and the crankshaft rear oil seal, and two press-fitting operations are performed front and back, which requires two operations and has low press-fitting efficiency.

[0034] In view of this, the present invention provides a crankshaft front and rear oil seal press-fitting device, which is used to press-fit the front oil seal and the rear oil seal on the engine cylinder block, wherein the upper end of the engine cylinder block is formed with a plurality of positioning pin holes. Figure 1 and Figure 2 The present invention is an embodiment of the crankshaft front and rear oil seal press-fitting device provided by the present invention.

[0035] Please refer to Figure 1 and Figure 2The crankshaft front and rear oil seals 32 press-fitting device 100 comprises a fixed crossbeam 1, a lifting mechanism 2 and two oil seal pressure head structures 3. The fixed crossbeam 1 has a press-fitting station. The lifting mechanism 2 is arranged below the fixed crossbeam 1 to carry the engine cylinder block 21 and to lift the engine cylinder block 21 to the press-fitting station. The two oil seal pressure head structures 3 are respectively used to place the front oil seal 31 and the rear oil seal 32. The two oil seal pressure head structures 3 are respectively arranged at the press-fitting station. The two oil seal pressure head structures 3 are movably arranged on the front and rear sides of the press-fitting station and in the front and rear directions, so that each of the oil seal pressure head structures 3 has a starting position away from the press-fitting station and a press-fitting position close to the press-fitting station, wherein when the lifting mechanism 2 lifts the engine cylinder block 21 to the press-fitting station, the two oil seal pressure head structures 3 are respectively moved from the starting position to the press-fitting position, so as to correspondingly press-fit the front oil seal 31 and the rear oil seal 32 on the two oil seal pressure head structures 3 on the engine cylinder block 21.

[0036] In the technical solution of the present invention, the approximate use process of the crankshaft front and rear oil seal 32 press-fitting device 100 is as follows: first, the engine block 21 is placed on the jacking mechanism 2, and then the engine block 21 is lifted to the press-fitting station by the jacking mechanism 2, and then the front oil seal 31 and the rear oil seal 32 are respectively placed on the two oil seal pressure head structures 3 at the starting position, and then the two oil seal pressure head structures 3 are respectively moved from the starting position to the press-fitting position, so as to press-fit the front oil seal 31 and the rear oil seal 32 on the two oil seal pressure head structures 3 on the engine block 21. In the above use process, the front oil seal 31 and the rear oil seal 32 are respectively press-fitted on the engine block 21 by the two oil seal pressure head structures 3, so that the front oil seal 31 and the rear oil seal 32 are press-fitted at the same time, thereby improving the press-fitting efficiency.

[0037] Of course, it should be noted that the oil seal pressure head structure 3 is a conventional press-fitting tool in the art and will not be described in detail here.

[0038] Specifically, in the embodiment of the present invention, a slide rail 11 extending in the front-to-back direction is provided on the fixed cross beam 1; the two oil seal pressure head structures 3 are each connected to a slide seat 33 that slides with the slide rail 11, so that the slide seat 33 slides with the slide rail 11, so that the slide seat 33 can slide on the slide rail 11 in the front-to-back direction, thereby realizing that the oil seal pressure head structure 3 can move in the front-to-back direction.

[0039] Furthermore, the crankshaft front and rear oil seal 32 press-fitting device 100 further includes a slide driver 34, and the slide driver 34 is used to drive the slide 33 to slide on the slide rail 11. The slide driver 34 drives the slide 33 to slide, thereby avoiding manual pushing, improving the degree of press-fitting automation, and increasing press-fitting efficiency. Of course, it should be noted that the specific implementation of the slide driver 34 is not limited. For example, the slide driver 34 can be an electric cylinder.

[0040] A guide hole 331 is provided at the opposite ends of the two slide seats 33; a guide shaft 12 is provided between the two slide seats 33, the guide shaft 12 extends in the front-to-back direction, and the two ends of the guide shaft 12 are respectively passed through the two guide holes 331, so that the two slide seats 33 are restricted to slide on the guide shaft 12, and cooperate with the sliding on the slide rail 11, further improving the activity accuracy of the slide seats 33. Specifically, in the embodiment of the present invention, the guide shaft 12 is loosely matched with the two guide holes 331 to avoid hindering the front-to-back sliding of the two slide seats 33.

[0041] Furthermore, a limit sensor 121 is provided in the middle of the guide shaft 12, wherein the limit sensor 121 can detect whether the slide 33 has correctly reached the press-fitting position. When the limit sensor 121 determines that the slide 33 has reached the press-fitting position, it immediately feeds back a press-fitting termination signal to the slide driver 34 (electric cylinder), and the slide driver 34 drives the two oil seal pressure head structures 3 to move from the press-fitting position to the starting position respectively to ensure the depth of the oil seal press-fitting. Specifically, in the embodiment of the present invention, the limit sensor 121 is a contact limit sensor 121.

[0042] In the embodiment of the present invention, a positioning pin 13 is provided on the fixed crossbeam 1, and the positioning pin 13 is inserted into the positioning pin 13 hole of the engine cylinder block 21 when the lifting mechanism 2 lifts the engine cylinder block 21 to the press-fitting station, so as to position the engine cylinder block 21 at the press-fitting station. In this way, when the engine cylinder block 21 is at the press-fitting station, the positioning pin 13 and the positioning pin 13 hole of the engine cylinder block 21 are precisely matched, so that the engine cylinder block 21 is precisely positioned at the press-fitting station, and the end face runout accuracy of the oil seal press-fitting is ensured.

[0043] Furthermore, the locating pins 13 are provided in plurality (two or more), and the plurality of locating pins 13 are used to correspond one-to-one with the plurality of locating pin 13 holes of the engine cylinder block 21. Under this scheme, the end face runout accuracy of the oil seal press is better.

[0044] Specifically, in an embodiment of the present invention, the fixed cross beam 1 includes a beam body 14, a connecting arm 15 protruding downward from the beam body 14, and a positioning plate 16 arranged at the lower end of the connecting arm 15; the positioning pin 13 is protruding from the lower end surface of the positioning plate 16. Under this scheme, the positioning plate 16 can limit the engine cylinder block 21 to prevent the engine cylinder block 21 from being lifted too far upward, so as to securely fix the engine cylinder block 21 at the pressing station.

[0045] The jacking mechanism 2 includes a cylinder tray 22 and a jacking drive 23. The cylinder tray 22 is used to carry the engine cylinder 21. The cylinder tray 22 is arranged below the fixed crossbeam 1 and is movable in the up and down directions so as to have a first position where it can move upward to reach the press-fitting station and a second position where it can move downward to be below the press-fitting station. The jacking drive 23 is used to drive the cylinder tray 22 to move up and down. In this way, the cooperation between the cylinder tray 22 and the jacking drive 23 realizes the automatic jacking of the engine cylinder 21, avoids manual labor, and further improves the press-fitting efficiency. It should be emphasized that the specific implementation of the jacking drive 23 is not limited. For example, the jacking drive 23 can be an electric cylinder.

[0046] The present invention also provides an engine assembly production line, including the above-mentioned crankshaft front and rear oil seal 32 press-fitting device 100. Since the engine assembly production line adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0047] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A crankshaft front and rear oil seal press-fitting device, used for press-fitting the front oil seal and the rear oil seal on the engine cylinder block, wherein the upper end of the engine cylinder block is formed with a plurality of positioning pin holes, characterized in that: The crankshaft front and rear oil seal press-fitting device comprises: Fixed crossbeam with press-fitting station; A lifting mechanism is arranged below the fixed crossbeam, and is used to carry the engine cylinder block and lift the engine cylinder block to the press-fitting station; and Two oil seal pressure head structures, respectively used to place a front oil seal and a rear oil seal, the two oil seal pressure head structures are respectively arranged at the front and rear sides of the press-fitting station and are both movably arranged in the front-to-back direction, so that each of the oil seal pressure head structures has a starting position away from the press-fitting station and a press-fitting position close to the press-fitting station; Wherein, when the lifting mechanism lifts the engine cylinder block to the press-fitting station, the two oil seal pressing head structures are respectively moved from the starting position to the press-fitting position, so as to press-fit the front oil seal and the rear oil seal on the two oil seal pressing head structures onto the engine cylinder block accordingly; The fixed crossbeam is provided with a slide rail extending in the front-rear direction; The two oil seal pressure head structures are both connected to a slide seat that is slidably matched with the slide rail; A guide hole is provided at the opposite ends of the two slide seats; A guide shaft is provided between the two slide seats, the guide shaft extends in the front-rear direction, and two ends of the guide shaft are respectively passed through the two guide holes; The fixed crossbeam is provided with a positioning pin, and the positioning pin is used to be inserted into the positioning pin hole of the engine cylinder body when the lifting mechanism lifts the engine cylinder body to the press-fitting station, so as to position the engine cylinder body at the press-fitting station.

2. The crankshaft front and rear oil seal press-fitting device according to claim 1, characterized in that: It also includes a slide seat driving component, which is used to drive the slide seat to slide on the slide rail.

3. The crankshaft front and rear oil seal press-fitting device according to claim 1, characterized in that: A limit sensor is arranged in the middle of the guide shaft.

4. The crankshaft front and rear oil seal press-fitting device according to claim 1, characterized in that: There are a plurality of positioning pins, and the plurality of positioning pins are used to correspond one-to-one with a plurality of positioning pin holes of the engine cylinder body.

5. The crankshaft front and rear oil seal press-fitting device according to claim 1, characterized in that: The fixed crossbeam comprises a beam body, a connecting arm protruding downward from the beam body, and a positioning plate arranged at the lower end of the connecting arm; The positioning pin is protrudingly arranged on the lower end surface of the positioning plate.

6. The crankshaft front and rear oil seal press-fitting device according to claim 1, characterized in that: The lifting mechanism comprises: A cylinder tray for carrying the engine cylinder, the cylinder tray is disposed below the fixed crossbeam and is movable in the vertical direction, so as to have a first position where it can move upward to reach the press-fitting station, and a second position where it can move downward to be located below the press-fitting station; and, The lifting driving member is used to drive the cylinder tray to move up and down.

7. An engine assembly production line, characterized in that: It comprises a crankshaft front and rear oil seal press-fitting device as described in any one of claims 1 to 6.

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