Expanding device for expanding large end of connecting rod

Abstract

The utility model discloses an expanding device for expanding a large head of a connecting rod. The expanding device comprises a small head inserting column, a large head inserting column and a linear driving source. And the small end inserting column is used for sleeving the small end of the connecting rod. And the large-head inserting column is used for sleeving the large head of the connecting rod. The linear driving source is connected with the small-head inserting column or the large-head inserting column so that the small-head inserting column and the large-head inserting column of the connecting rod can be driven to be close to each other or away from each other. The upper part and the lower part of the connecting rod can be easily disassembled, so that the nesting work of a bearing bush and a large end of the connecting rod is conveniently completed.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting rod processing equipment, in particular to an expanding device for expanding a large end of a connecting rod. Background Art

[0002] The connecting rod of a traditional motorcycle engine is generally an integrated structure, for example, it is formed by casting, and then the bearing is knocked into the big end of the connecting rod along the axis of the big end of the connecting rod. However, there is a line contact between the bearing and the connecting rod, and the load-bearing capacity is limited. Therefore, with the upgrading of technology, when it is necessary to increase the displacement of the motorcycle, it is necessary to use a bearing bushing installed in the big end of the connecting rod for load bearing (there is a surface contact between the bearing bushing and the connecting rod) to ensure that the connecting rod can bear a larger load.

[0003] However, it is difficult to insert the bearing shell into the big end of the connecting rod along the axial direction of the connecting rod to complete the nesting work, resulting in greater difficulty in assembly. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model aims to provide an expansion device for expanding the big end of a connecting rod, which can easily disassemble the upper and lower parts of the connecting rod to facilitate the installation and nesting of the bearing shell and the big end of the connecting rod.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] An expansion device for expanding a large end of a connecting rod, comprising:

[0007] A small-head plug-in column is used for the small-head of the connecting rod to be socketed;

[0008] A large-end plug-in column is used for the large-end socket of the connecting rod;

[0009] A linear driving source is connected to the small-head plug-in column or the large-head plug-in column to drive the small-head plug-in column and the large-head plug-in column to move closer to or farther away from each other.

[0010] Furthermore, the expansion device for expanding the large head of the connecting rod also includes a middle positioning seat, which is located between the small head plug-in column and the large head plug-in column; the middle positioning seat is provided with a rod positioning groove, and the rod positioning groove is used to accommodate the rod of the connecting rod.

[0011] Furthermore, the middle positioning seat is provided with a large head partial positioning groove, the large head partial positioning groove is communicated with the rod positioning groove, and the large head partial positioning groove is used to accommodate a portion of the large head of the connecting rod that is connected to the rod of the connecting rod.

[0012] Furthermore, the large head plug-in column includes a first convex column and a second convex column which are independent of each other. The second convex column is installed on the middle positioning seat and serves as a part of the large head local positioning groove.

[0013] Furthermore, the expansion device for expanding the big end of the connecting rod also includes a guide rail, the big end plug-in column is movably matched with the guide rail, and the linear drive source is connected to the big end plug-in column.

[0014] Furthermore, the expansion device for expanding the large end of the connecting rod also includes a mounting plate, and the guide rail, the middle positioning seat and the small end plug-in column are all mounted on the mounting plate.

[0015] Furthermore, the mounting plate includes a flat plate and a vertical plate, the guide rail, the middle positioning seat and the small head plug-in column are all installed on the flat plate, and the linear drive source is installed on the vertical plate.

[0016] Furthermore, the small-head plug-in column and the large-head plug-in column are both placed in a vertical direction, and the depth direction of the rod positioning groove is the gravity direction.

[0017] Furthermore, the small-head plug-in column is a stepped column, the large column of the small-head plug-in column is connected to the mounting plate and supports the small column of the small-head plug-in column, and the small column is used for the small head of the connecting rod to be sleeved.

[0018] Furthermore, the linear drive source is a linear motor.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The small end of the connecting rod is sleeved through the small end plug-in column, and the large end of the connecting rod is sleeved through the large end plug-in column; and the small end plug-in column and the large end plug-in column are driven away from each other by a linear drive source, so that the connecting rod can be disassembled efficiently and stably.

[0021] 2. In addition, since the small-head plug-in column and the large-head plug-in column are the main stress-bearing parts during normal operation, using the two main stress-bearing parts to respectively connect the small-head plug-in column and the large-head plug-in column can avoid other unexpected phenomena as much as possible, such as avoiding unexpected accidents that cause a decrease in strength.

[0022] 3. Moreover, both the small head and the big head are sleeve hole structures, and the small head plug-in column and the big head plug-in column are respectively plugged into the small head and the big head, so the connection stability is better, and the assembly relationship is simple, which improves the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of an expansion device for expanding the big end of a connecting rod according to the utility model;

[0024] Figure 2 for Figure 1 The effect picture when working;

[0025] Figure 3 It is a schematic diagram of the structure of the connecting rod (i.e., the workpiece).

[0026] In the figure: 1, small head plug-in column; 11, large column; 12, small column; 2, large head plug-in column; 21, first protruding column; 22, second protruding column; 3, linear drive source; 4, middle positioning seat; 41, rod positioning groove; 42, large head partial positioning groove; 5, guide rail; 6, mounting plate; 61, flat plate; 62, vertical plate; 7, workpiece; 71, small head; 72, large head; 73, rod. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element, or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element, or there may be an element centered thereon. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] Unless otherwise defined, all technical terms and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] See also Figure 3 The improved connecting rod still includes a small head 71, a rod 73 and a large head 72. According to the common name, a part of the large head 72 becomes the lower part (i.e., the lower part of the connecting rod), and the other part of the large head 72 is connected to the rod 73 and is called the upper part (i.e., the upper part of the connecting rod). The upper part and the lower part are connected together by two bolts. When the bearing needs to be installed, it is necessary to first remove the matching nuts on the two bolts, and then use external force to drive the lower part away from the upper part along the axial direction of the bolt to complete the disassembly of the connecting rod, and then install the two half rings of the bearing on the upper and lower parts respectively, and then complete the reassembly of the connecting rod.

[0031] See also Figure 1-Figure 2In this embodiment, an expansion device for expanding the big head of a connecting rod comprises: a small head plug-in column 1, a big head plug-in column 2 and a linear drive source 3.

[0032] The small-head plug-in column 1 is adapted to the small head 71 of the connecting rod, preferably with clearance fit, and is used for the small head 71 of the connecting rod (i.e., the workpiece 7) to be sleeved.

[0033] The big-end plug-in column 2 is adapted to the big end 72 of the connecting rod, preferably with clearance fit, and is used for the big end 72 of the connecting rod to be sleeved.

[0034] The linear drive source 3 is connected to the small-head plug-in column 1 or the large-head plug-in column 2 so as to drive the small-head plug-in column 1 and the large-head plug-in column 2 to move closer to or away from each other.

[0035] During operation, the big end 72 of the connecting rod is sleeved on the big end plug-in column 2, and the small end 71 of the connecting rod is sleeved on the small end plug-in column 1, and then the linear drive source 3 is started to make the big end plug-in column 2 and the small end plug-in column 1 move away from each other, so that the upper part of the connecting rod and the lower part of the connecting rod can be separated from each other.

[0036] Obviously, the small head 71 of the connecting rod is sleeved through the small head plug-in column 1, and the big head 72 of the connecting rod is sleeved through the big head plug-in column 2; and the small head plug-in column 1 and the big head plug-in column 2 are driven away from each other by the linear drive source 3, so that the connecting rod can be disassembled efficiently and stably. In addition, since the small head plug-in column 1 and the big head plug-in column 2 are the main stress-bearing parts during normal work, the two main stress-bearing parts are used to respectively sleeve the small head plug-in column 1 and the big head plug-in column 2, so as to avoid other unexpected phenomena as much as possible, such as avoiding unexpected accidents that cause strength reduction. Moreover, the small head 71 and the big head 72 are both sleeve hole structures, and the small head plug-in column 1 and the big head plug-in column 2 are respectively inserted into the small head 71 and the big head 72, so the connection stability is better, and the assembly relationship is simple, which improves the work efficiency.

[0037] In order to further ensure the stability of the connecting rod during the disassembly process, preferably, a device for expanding the large head of the connecting rod also includes a middle positioning seat 4, which is located between the small head plug-in column 1 and the large head plug-in column 2; the middle positioning seat 4 is provided with a rod positioning groove 41, which is used to accommodate the rod portion 73 of the connecting rod.

[0038] In order to further ensure the stability of the connecting rod during the disassembly process, preferably, the middle positioning seat 4 is provided with a large head partial positioning groove 42, which is connected to the rod positioning groove 41, and the large head partial positioning groove 42 is used to accommodate the part of the big head 72 of the connecting rod that is connected to the rod 73 of the connecting rod.

[0039] Preferably, the large head plug-in column 2 includes a first boss 21 and a second boss 22 which are independent of each other. The second boss 22 is installed on the middle positioning seat 4 and serves as a part of the large head local positioning groove 42. With this arrangement, when the linear drive source 3 drives the small head plug-in column 1 and the large head plug-in column 2 away from each other, it actually drives the first boss 21 and the small head plug-in column 1 away from each other, and also drives the first boss 21 and the second boss 22 away from each other. The advantage of this arrangement is that the first boss 21 and the second boss 22 can both share a certain blocking force. In this way, Figure 1-Figure 3 Taking the example in the figure, when the linear drive source 3 pulls back the first protrusion 21, the second protrusion 22 and the small-head plug-in column 1 act as resistance at the same time, thereby increasing the service life of an expansion device for expanding the large head of a connecting rod.

[0040] Preferably, an expansion device for expanding the big end of the connecting rod further comprises a guide rail 5, the big end plug-in column 2 is movably matched with the guide rail 5, and the linear drive source 3 is connected to the big end plug-in column 2. In this arrangement, the linear drive source 3 only needs to drive the big end plug-in column 2 to move. As an alternative arrangement, the linear drive source 3 can also drive the small end plug-in column 1 and the middle positioning seat 4 to move at the same time.

[0041] Preferably, the expansion device for expanding the big end of the connecting rod further comprises a mounting plate 6, and the guide rail 5, the middle positioning seat 4 and the small end plug-in column 1 are all mounted on the mounting plate 6. In this way, by moving the mounting plate 6, the entire expansion device for expanding the big end of the connecting rod can be moved.

[0042] Preferably, the mounting plate 6 includes a flat plate 61 and a vertical plate 62, the guide rail 5, the middle positioning seat 4 and the small head plug-in column 1 are all mounted on the flat plate 61, and the linear drive source 3 is mounted on the vertical plate 62. This arrangement makes the overall structure of the expansion device for expanding the large head of the connecting rod more compact and simple.

[0043] Preferably, the small head plug-in column 1 and the large head plug-in column 2 are placed in the vertical direction, and the depth direction of the rod positioning groove 41 is the gravity direction. In this way, the connecting rod is stably embedded in the rod positioning groove 41 and the large head partial positioning groove 42 by its own gravity.

[0044] Preferably, the small head plug-in column 1 is a stepped column, and the large column 11 of the small head plug-in column 1 is connected to the mounting plate 6 and supports the small column 12 of the small head plug-in column 1, and the small column 12 is used for the small head 71 of the connecting rod to be sleeved. In this way, when the middle positioning seat 4 supports the connecting rod, the small head plug-in column 1 can also support the connecting rod.

[0045] Preferably, the linear drive source 3 is an existing linear drive source 3 such as a linear motor, an electric push rod, etc. Among them, it is best to use a linear servo motor as a power source, and its output torque is relatively gentle.

[0046] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An expansion device for expanding the big end of a connecting rod, characterized in that: include: A small-end plug-in column (1) for receiving a small end (71) of a connecting rod; A large end plug-in column (2) for receiving the large end (72) of the connecting rod; A linear drive source (3) is connected to the small-head plug-in column (1) or the large-head plug-in column (2) so as to be able to drive the small-head plug-in column (1) and the large-head plug-in column (2) to move closer to each other or farther away from each other.

2. An expansion device for expanding the big end of a connecting rod as claimed in claim 1, characterized in that: The expansion device for expanding the large end of a connecting rod further comprises a middle positioning seat (4), wherein the middle positioning seat (4) is located between the small end plug-in column (1) and the large end plug-in column (2); the middle positioning seat (4) is provided with a rod positioning groove (41), wherein the rod positioning groove (41) is used to accommodate the rod portion (73) of the connecting rod.

3. An expansion device for expanding the big end of a connecting rod as claimed in claim 2, characterized in that: The middle positioning seat (4) is provided with a large head partial positioning groove (42), the large head partial positioning groove (42) being in communication with the rod portion positioning groove (41), and the large head partial positioning groove (42) being used to accommodate a portion of the large head (72) of the connecting rod that is connected to the rod portion (73) of the connecting rod.

4. An expansion device for expanding the big end of a connecting rod as claimed in claim 3, characterized in that: The large head plug-in column (2) comprises a first convex column (21) and a second convex column (22) which are independent of each other; the second convex column (22) is mounted on the middle positioning seat (4) and serves as a part of the large head local positioning groove (42).

5. An expansion device for expanding the big end of a connecting rod as claimed in claim 4, characterized in that: The expansion device for expanding the big end of a connecting rod further comprises a guide rail (5), the big end plug-in column (2) and the guide rail (5) are movably matched, and the linear drive source (3) is connected to the big end plug-in column (2).

6. An expansion device for expanding the big end of a connecting rod as claimed in claim 5, characterized in that: The expansion device for expanding the large end of a connecting rod further comprises a mounting plate (6), and the guide rail (5), the middle positioning seat (4) and the small end plug-in column (1) are all mounted on the mounting plate (6).

7. An expansion device for expanding the big end of a connecting rod as claimed in claim 6, characterized in that: The mounting plate (6) comprises a flat plate (61) and a vertical plate (62); the guide rail (5), the middle positioning seat (4) and the small head plug-in column (1) are all mounted on the flat plate (61); and the linear drive source (3) is mounted on the vertical plate (62).

8. An expansion device for expanding the big end of a connecting rod as claimed in claim 6, characterized in that: The small-head plug-in column (1) and the large-head plug-in column (2) are both placed in a vertical direction, and the depth direction of the rod positioning groove (41) is the gravity direction.

9. An expansion device for expanding the big end of a connecting rod as claimed in claim 8, characterized in that: The small-head plug-in column (1) is a stepped column. The large column (11) of the small-head plug-in column (1) is connected to the mounting plate (6) and supports the small column (12) of the small-head plug-in column (1). The small column (12) is used for the small head (71) of the connecting rod to be sleeved.

10. An expansion device for expanding the big end of a connecting rod as claimed in claim 1, characterized in that: The linear drive source (3) is a linear motor.

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