Machining and positioning tool for engine shell

Abstract

The utility model relates to a processing and positioning tool of an engine shell, which comprises a base, a positioning plate arranged on the base and a bottom plate positioned below the positioning plate, the bottom plate is connected with the positioning plate through a connecting rod, and the positioning plate is provided with a positioning piece used for penetrating through a first bearing hole on the engine shell. The first bearing hole is located under the pressing head at the moment, a through hole is formed in the positioning plate, a positioning rod sequentially penetrates through the positioning hole formed in the engine shell and the through hole to fix the engine shell to the positioning plate, and the center line of the first bearing hole and the center line of the second bearing hole are parallel to the length direction of the base at the moment. The bottom plate can move back and forth in the length direction of the base till the first bearing hole and the second bearing hole are located under the pressing head. According to the machining positioning tool for the engine shell, the other bearing hole located in the engine shell can be moved to the position under the pressing head under the condition that the engine shell does not need to be lifted, time and labor are saved, and the assembling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to engine machining technical field, concretely relates to a machining positioning frock of engine casing. BACKGROUND

[0002] In the manufacturing process of modern engine, the accurate installation of bearing is one of the key steps to ensure the high efficiency and long life of engine, at present, the bearing is usually pressed into the bearing hole of engine casing through pressing mechanism, the specific steps are as follows: first, the engine casing is placed on the positioning plate, the positioning plate is provided with a positioning column located in the middle, when placing the engine casing, the bearing hole is sleeved on the positioning column, so that the bearing hole is aligned with the pressure head in the pressing mechanism, then the bearing is placed above the bearing hole, the pressure head is driven to press down through hydraulic pressure or pneumatic pressure, so that the bearing enters the bearing hole, that is, the pressing is completed.

[0003] Double bearing holes are often used in engines that need to support multiple shafts (crankshaft + balance shaft / camshaft), reinforced structures or adapt to complex layouts, the pressing frock used at present can only press one bearing hole at a time, after pressing one bearing hole, the engine casing needs to be lifted and moved, the other bearing hole is sleeved on the positioning column, so that it is located directly below the pressure head, so that the bearing is pressed into the bearing hole, which not only is troublesome, but also wastes manpower and is low in assembly efficiency. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model lies in that, in view of the above defects, a machining positioning frock of engine casing is provided, which can move another bearing hole on the engine casing to be directly below the pressure head without lifting the engine casing, thereby saving time and labor and improving assembly efficiency.

[0005] The technical scheme adopted by the utility model to solve the technical problem is: a machining positioning frock of engine casing, comprising a base, a positioning plate arranged on the base and a bottom plate located below the positioning plate, the bottom plate is connected with the positioning plate through a connecting rod, the positioning plate is provided with a positioning piece for passing through a first bearing hole on the engine casing, at this time, the first bearing hole is located directly below the pressure head, the positioning plate is provided with a through hole, the engine casing is fixed on the positioning plate by passing through the positioning hole arranged on the engine casing and the through hole in sequence through the positioning rod, at this time, the center lines of the first bearing hole and the second bearing hole are parallel to the length direction of the base, the bottom plate can move back and forth along the length direction of the base to be located directly below the pressure head of the first bearing hole and the second bearing hole respectively, and is limited by the limiting structure.

[0006] The base is a frame structure, the pressing mechanism is located above the base, the positioning plate is arranged in the base and below the pressing mechanism; the connecting rod comprises an outer sleeve and an inner sleeve in sliding cooperation with the outer sleeve, and a spring is fixedly connected between the bottom of the inner sleeve and the bottom wall of the outer sleeve; when the pressing head is pressed down, the positioning plate can move downward with the pressing of the pressing head, and after the pressing is completed, the positioning plate is restored to the initial position under the driving of the spring; when the stroke of the pressing head is too large, the connecting rod can play a buffering role on the engine shell, avoiding damage caused by rigid extrusion of the engine.

[0007] The working principle of the scheme is that: in the initial state, i.e. the state without placing the engine shell, the positioning piece on the positioning plate is located directly below the pressing head; during pressing, the engine shell is first placed on the positioning plate, so that the first bearing hole is sleeved on the positioning piece, and then the engine shell is fixed on the positioning plate in the horizontal direction through the positioning rod passing through the positioning hole and the through hole arranged on the engine shell; at this time, the center lines of the first bearing hole and the second bearing hole are parallel to the length direction of the base; after the bearing is pressed into the first bearing hole, the base plate is moved along the length direction of the base to drive the engine shell to move, so that the second bearing hole is located directly below the pressing head and is limited by the limiting structure; after the bearing is pressed into the second bearing hole, the engine shell that has completed pressing is taken away, the next engine shell is placed on the positioning plate, and the first bearing hole is sleeved on the positioning piece at the same time; at this time, the second bearing hole on the engine shell is located directly below the pressing head, the bearing is pressed into the second bearing hole, the base plate is moved so that the first bearing hole is located directly below the pressing head and is limited by the limiting structure, the bearing is pressed into the first bearing hole, the engine shell is taken away after the pressing is completed, and the bearing pressing of the next engine shell is continued.

[0008] Compared with the prior art, the scheme has the beneficial effects that: the positioning piece and the positioning rod limit the movement of the engine shell in the horizontal direction, avoiding displacement of the engine shell during pressing, so as to affect the assembly of the bearing; after the bearing is pressed into one bearing hole on the engine shell, the other bearing hole is pressed with the bearing, without manually lifting the engine shell to place the other bearing hole in the position corresponding to the pressing head for pressing, which saves time and labor and improves assembly efficiency.

[0009] As the preferred embodiment of the utility model, the upper side of the base is provided with a sliding groove along the length direction thereof, two first connecting holes are uniformly and spacedly arranged in the sliding groove, a sliding block for sliding cooperation with the sliding groove is arranged at the bottom of the bottom plate, the sliding block extends from one side of the bottom plate, the extended sliding block is provided with a second connecting hole for matching with the first connecting hole, the bottom plate and the positioning plate are limited through the first connecting hole and the second connecting hole by the limiting structure, and at this time, the first bearing hole or the second bearing hole is located directly below the pressing head.

[0010] The beneficial effects of the present scheme are as follows: the sliding cooperation between the sliding block and the sliding groove guides the movement of the bottom plate; after the first bearing hole or the second bearing hole, which has not yet been pressed with a bearing, is moved to be directly below the pressing head, the bottom plate is fixed to the base through the first connecting hole and the second connecting hole in sequence by the limiting structure, so that the movement of the bottom plate during pressing is avoided, and the installation of the bearing is affected.

[0011] As the preferred embodiment of the utility model, the limiting structure comprises a sliding sleeve arranged at one side of the bottom plate and a limiting rod in sliding cooperation with the sliding sleeve, the limiting rod comprises a horizontal cross rod and first and second vertical rods vertically arranged at two sides of the cross rod, the first vertical rod is in sliding cooperation with the sliding sleeve and is fixedly connected through a tension spring, in the initial state, the second vertical rod passes through the second connecting hole and the first connecting hole in sequence, the cross rod is lifted upward, and the second vertical rod is withdrawn from the first connecting hole.

[0012] The beneficial effects of the present scheme are as follows: the cross rod is lifted upward, the second vertical rod is withdrawn from the first connecting hole, the bottom plate is moved, the second bearing hole is moved to be directly below the pressing head, after being moved to the position, the hand is released, the second vertical rod is again clamped into the second connecting hole and the first connecting hole under the driving of the tension spring, and the bottom plate is limited.

[0013] As the preferred embodiment of the utility model, along the width direction of the base, a handle extending from one side of the base is arranged on the cross rod.

[0014] The beneficial effects of the present scheme are as follows: the handle is held and lifted upward, so that the second vertical rod is withdrawn from the first connecting hole, and compared with the operation of lifting the cross rod upward to drive the second vertical rod to move upward, the operation is more convenient.

[0015] As the preferred embodiment of the utility model, a through hole is arranged in the middle of the positioning plate, a first connecting sleeve corresponding to the position of the through hole is arranged on the upper side of the middle of the bottom plate, the positioning member comprises a positioning column in sliding cooperation with the first connecting sleeve along the vertical direction, a spring is connected between the bottom of the positioning column and the bottom wall of the first connecting sleeve, and in the initial state, the upper end of the positioning column extends from the upper side of the through hole.

[0016] The beneficial effects of the scheme are that in the initial state, the upper end of the positioning column extends from the upper side of the through hole and extends into the bearing hole, the positioning column cooperates with the positioning rod, can limit the movement of the engine shell in the horizontal direction, the positioning column and the first connecting sleeve are connected through the spring, in the process of pressing the bearing into the bearing hole by the pressing head, the positioning column can move downward, avoiding blocking the pressing process.

[0017] As the preferred embodiment of the utility model, the bottom plate upper side is equipped with the second connecting sleeve corresponding to the position of the positioning hole on the engine shell, the lower end of the positioning rod passes through the positioning hole and the through hole, and is clamped with the second connecting sleeve.

[0018] The beneficial effects of the scheme are that the lower end of the positioning rod is clamped with the second connecting sleeve, avoiding the positioning rod from falling off from the positioning hole and the through hole in the vertical direction, so that the positioning rod cannot cooperate with the positioning column to limit the engine shell in the horizontal direction. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic view of the pressing head aligning one of the bearing holes on the engine shell in the utility model.

[0020] Figure 2 It is a schematic view of the pressing head aligning another bearing hole on the engine shell in the utility model.

[0021] Figure 3 It is Figure 2 The structural schematic view of A in the middle.

[0022] Figure 4 It is the structural schematic view of the bottom plate and the positioning plate. DETAILED DESCRIPTION

[0023] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described below are only used to explain and describe the utility model, and cannot limit the protection scope of the utility model.

[0024] The terms "first", "second" and the like in the specification, claims, embodiments of the application are used to distinguish similar objects, and are not used to describe a specific order or sequence.

[0025] The utility model is further described in detail below through the preferred specific embodiments:

[0026] The reference numerals in the accompanying drawings include: base 1, slide 101, pressing mechanism 2, engine housing 3, first bearing hole 301, second bearing hole 302, positioning plate 4, through hole 401, through hole 402, bottom plate 5, positioning rod 6, limiting rod 7, horizontal rod 701, first vertical rod 702, second vertical rod 703, positioning post 8, first connecting sleeve 9, sliding sleeve 10, handle 11, slider 12, second connecting sleeve 13, and connecting rod 14.

[0027] As attached Figure 1 Appendix Figure 2 and attached Figure 4 As shown: The machining and positioning fixture for the engine housing in this embodiment includes a base 1, a positioning plate 4 disposed on the base 1, and a bottom plate 5 located below the positioning plate 4. The bottom plate 5 and the positioning plate 4 are connected by connecting rods 14. In this embodiment, four connecting rods 14 are arranged along the circumference of the bottom plate 5. A sliding groove 101 is opened on the upper side of the base 1 along its length direction. Two first connecting holes are evenly spaced in the sliding groove 101. The positioning plate 4 is provided with a positioning element for passing through the first bearing hole 301 on the engine housing 3.

[0028] Specifically, the positioning plate 4 has a through hole 402 in the middle, and the bottom plate 5 has a first connecting sleeve 9 on the upper side of the middle, corresponding to the position of the through hole 402. The positioning component includes a positioning post 8 that slides in the vertical direction with the first connecting sleeve 9. A spring is connected between the bottom of the positioning post 8 and the bottom wall of the first connecting sleeve 9. In this embodiment, a compression spring is preferred. In the initial state, the upper end of the positioning post extends out from the upper side of the through hole.

[0029] As attached Figure 3 and attached Figure 4 As shown: The positioning plate 4 is provided with a through hole 401. The positioning rod 6 passes through the positioning hole and the through hole 401 in sequence on the engine housing 3 to fix the engine housing 3 on the positioning plate 4. Specifically, the upper side of the base plate 5 is provided with a second connecting sleeve 13 corresponding to the position of the positioning hole on the engine housing 3. The lower end of the positioning rod 6 passes through the positioning hole and the through hole 401 and is engaged with the second connecting sleeve 13. In this embodiment, there are four through holes 401 and four second connecting sleeves 13 to accommodate the different positions of the positioning holes on different models of engine housing 3.

[0030] As attached Figure 3 and attached Figure 4 As shown: The bottom of the base plate 5 is provided with a slider 12 for sliding cooperation with the slide groove 101. One side of the slider 12 extends from one side of the base plate 5, and the extended part of the slider 12 is provided with a second connecting hole for matching the first connecting hole. After the base plate 5 moves, the limiting structure passes through the first connecting hole and the second connecting hole in sequence to limit the base plate 5 and the positioning plate 4.

[0031] The limiting structure comprises a sliding sleeve 10 arranged on one side of the bottom plate 5 and a limiting rod 7 in sliding cooperation with the sliding sleeve 10, the limiting rod 7 comprises a horizontal cross rod 701 and first and second vertical rods 702 and 703 arranged vertically on both sides of the cross rod 701, the first vertical rod 702 is in sliding cooperation with the sliding sleeve 10 and is fixedly connected through a tension spring, in the initial state, the second vertical rod 703 passes through the second connecting hole and the first connecting hole in sequence, lifts the cross rod 701 upward, the second vertical rod 703 is withdrawn from the first connecting hole, along the width direction of the base 1, the cross rod 701 is provided with a handle 11 extending from one side of the base 1.

[0032] Specific pressing process:

[0033] In the initial state, i.e. the state without placing the engine shell 3, the via hole 402 is located directly below the pressing head, the upper end of the positioning column 8 extends from the upper side of the via hole 402, during pressing, the engine shell 3 is first placed on the positioning plate 4, so that the first bearing hole 301 is sleeved on the positioning column 8, at this time, the first bearing hole 301 is located directly below the pressing head, then the positioning rod 6 passes through the positioning hole and one of the through holes 401, so that the engine shell 3 is fixed on the positioning plate 4 in the horizontal direction, at this time, the center lines of the first and second bearing holes 301 and 302 are parallel to the length direction of the base 1, the bearing is placed on the upper side of the first bearing hole 301, the pressing head is driven by hydraulic pressure or air pressure to press down, so that the bearing is pressed into the first bearing hole 301;

[0034] After the bearing is pressed into the first bearing hole 301, the cross rod 701 is lifted upward, the second vertical rod 703 is withdrawn from one of the first connecting holes, the bottom plate 5 is moved, after being moved to the position, the second vertical rod 703 is clamped into the second connecting hole and the other first connecting hole under the driving of the tension spring, at this time, the second bearing hole 302 is moved to be directly below the pressing head, the bearing is placed on the upper side of the second bearing hole 302, the pressing head is driven by hydraulic pressure or air pressure to press down, so that the bearing is pressed into the second bearing hole 302;

[0035] After the pressing is completed, the engine shell 3 is taken away, then the next engine shell 3 is placed on the positioning plate 4, in the same way, the first bearing hole 301 is sleeved on the positioning column 8, at this time, the second bearing hole 302 on the engine shell 3 is located directly below the pressing head, the bearing is placed on the upper side of the second bearing hole 302, the bearing is pressed into the second bearing hole 302 through the pressing head, after the bearing is pressed into the second bearing hole 302, the bottom plate 5 is moved, so that the first bearing hole 301 is located directly below the pressing head and is limited by the limiting structure, the bearing is placed on the upper side of the first bearing hole 301, the bearing is pressed into the first bearing hole 301 through the pressing head, after the pressing is completed, the engine shell 3 is taken away, the pressing of the bearing on the next engine shell 3 is continued.

[0036] The preferred embodiments of the present application are described in detail above in combination with the drawings, and typical known structures and known common knowledge techniques are not described in detail here. Those skilled in the art can improve and implement the technical solutions of the present application based on their own abilities and the inspiration given by the embodiments, and some typical known structures, known methods or known common knowledge techniques should not be an obstacle for those skilled in the art to implement the present application.

[0037] The scope of protection of the present application should be subject to the content of its claims, and the content recorded in the utility model content, specific implementation and the drawings of the specification is used to explain the claims.

[0038] Within the technical concept of the present application, several modifications can also be made to the specific embodiments of the present application, and these modified specific embodiments should also be considered within the protection scope of the present application.

Claims

1. A machining and positioning fixture for an engine housing, comprising a base, a positioning plate disposed on the base, and a bottom plate located below the positioning plate, wherein the bottom plate and the positioning plate are connected by a connecting rod, characterized in that: The positioning plate is provided with a positioning element for passing through the first bearing hole on the engine housing. At this time, the first bearing hole is located directly below the pressure head. The positioning plate is provided with a through hole. The engine housing is fixed on the positioning plate by passing through the positioning hole and the through hole on the engine housing in sequence. At this time, the center lines of the first bearing hole and the second bearing hole are parallel to the length direction of the base. The base plate can move back and forth along the length direction of the base until the first bearing hole and the second bearing hole are located directly below the pressure head, and is limited by a limiting structure.

2. The machining and positioning fixture for the engine housing according to claim 1, characterized in that: The upper side of the base has a groove along its length. Two first connecting holes are evenly spaced in the groove. The bottom of the base plate has a slider for sliding with the groove. One side of the slider extends from one side of the base plate, and the extended slider part has a second connecting hole for matching the first connecting hole. The base plate and the positioning plate are limited by a limiting structure passing through the first and second connecting holes. At this time, the first bearing hole or the second bearing hole is located directly below the pressure head.

3. The machining and positioning fixture for the engine housing according to claim 2, characterized in that: The limiting structure includes a sliding sleeve disposed on one side of the base plate and a limiting rod that slides with the sliding sleeve. The limiting rod includes a horizontally disposed crossbar and a first vertical rod and a second vertical rod disposed vertically on both sides of the crossbar. The first vertical rod slides with the sliding sleeve and is fixedly connected by a tension spring. In the initial state, the second vertical rod passes through the second connecting hole and the first connecting hole in sequence, lifts the crossbar upward, and the second vertical rod exits from the first connecting hole.

4. The machining and positioning fixture for the engine housing according to claim 3, characterized in that: Along the width direction of the base, the crossbar is provided with a handle extending from one side of the base.

5. The machining and positioning fixture for the engine housing according to claim 1, characterized in that: The positioning plate has a through hole in the middle, and the upper side of the middle of the base plate is provided with a first connecting sleeve corresponding to the position of the through hole. The positioning component includes a positioning post that slides in the vertical direction with the first connecting sleeve. A spring is connected between the bottom of the positioning post and the bottom wall of the first connecting sleeve. In the initial state, the upper end of the positioning post extends out from the upper side of the through hole.

6. The machining and positioning fixture for the engine housing according to claim 1, characterized in that: The upper side of the base plate is provided with a second connecting sleeve corresponding to the position of the positioning hole on the engine housing. The lower end of the positioning rod passes through the positioning hole and the through hole and is engaged with the second connecting sleeve.

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