Connecting rod positioning and fixing device

Abstract

The utility model relates to a connecting rod positioning and fixing device which is used for positioning and fixing a connecting rod, the connecting rod is provided with a large head end and a small head end, the large head end is provided with a large head hole, and the small head end is provided with a small head hole; comprising a base, a large-head positioning assembly, a small-head positioning assembly and an auxiliary positioning device, the large head positioning assembly and the small head positioning assembly are both installed on the base and used for positioning and fixing the large head end and the small head end respectively. The small head positioning assembly is provided with a through hole, and the through hole and the small head hole are coaxially arranged; the auxiliary positioning device comprises a small-head pile head and a driving part, the outer wall face of the small-head pile head is attached to the inner wall face of the small-head hole and the inner wall face of the through hole, and the driving part can drive the small-head pile head to axially slide along the small-head hole and the through hole. And the press-fitting effect of the connecting rod and the bushing is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine component assembly, in particular to a connecting rod positioning and fixing device. BACKGROUND

[0002] The connecting rod is a force-bearing moving part connected with the piston of an engine and should have sufficient strength under the reciprocating action in the cylinder, so the bushing embedded in the small-end bore of the connecting rod needs to be durable and reliable.

[0003] In the prior art, the assembly of the bushing and the connecting rod is usually realized by press fitting, and the main process is as follows: the connecting rod is fixed on the main body of the equipment by using a connecting rod fixing device, the bushing is fixed by using a clamp, and the clamp and the bushing are driven to move downward synchronously to press fit the bushing into the small-end bore of the connecting rod. The connecting rod fixing device usually includes an end face abutting structure and a circumferential abutting structure for limiting the end face (i.e. the axial direction) of the connecting rod and the circumferential direction (i.e. the radial direction) of the connecting rod, respectively.

[0004] However, the above-mentioned method is prone to low positioning accuracy of the small-end bore, which in turn affects the press fitting effect of the bushing and the small-end bore. SUMMARY

[0005] The technical problem to be solved by the utility model is to overcome the defects in the prior art and provide a connecting rod positioning and fixing device.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A connecting rod positioning and fixing device is used for positioning and fixing a connecting rod, the connecting rod has a big-end and a small-end, the big-end has a big-end bore, and the small-end has a small-end bore;

[0008] The device comprises a base, a big-end positioning assembly, a small-end positioning assembly and an auxiliary positioning device;

[0009] The big-end positioning assembly and the small-end positioning assembly are both installed on the base and are used for positioning and fixing the big-end and the small-end, respectively;

[0010] The small-end positioning assembly has a through hole, and the through hole is coaxially arranged with the small-end bore;

[0011] The auxiliary positioning device comprises a small-end pile head and a driving part, the outer wall surface of the small-end pile head is attached to the inner wall surface of the small-end bore and the inner wall surface of the through hole, and the driving part can drive the small-end pile head to axially slide along the small-end bore and the through hole.

[0012] Preferably, one end of the small-end pile head opposite to the small-end bore has a conical guide section;

[0013] The diameter of the conical guide section gradually increases from top to bottom.

[0014] Preferably, it is also used for mutual cooperation with the bush clamp to realize the press fitting of the connecting rod and the bush;

[0015] The upper end of the pile head is provided with a matching groove for mutual cooperation with the driving rod at the lower end of the bush clamp.

[0016] Preferably, the small head positioning assembly comprises a small head support seat fixedly installed on the base,

[0017] The upper end of the small head support seat abuts against one side end surface of the connecting rod.

[0018] Preferably, the small head positioning assembly further comprises a first circumferential limiting block and a second circumferential limiting block;

[0019] The first circumferential limiting block is installed on the base and abuts against the outer sidewall of the small head support seat;

[0020] The second circumferential limiting block is installed on the first circumferential limiting block and abuts against the outer sidewall of the small head end.

[0021] Preferably, the second circumferential limiting block is provided with a plurality of second circumferential limiting blocks;

[0022] The plurality of second circumferential limiting blocks are circumferentially distributed along the small head end, or the plurality of second circumferential limiting blocks are symmetrically arranged about the plane in which the center axis of the big head hole and the center axis of the small head hole are located.

[0023] Preferably, the small head positioning assembly further comprises a guide support seat arranged opposite to the small head support seat;

[0024] The guide support seat is fixedly connected with the base through a mounting frame;

[0025] The guide support seat abuts against the side end surface of the connecting rod away from the small head support seat.

[0026] Preferably, the guide support seat has a guide hole coaxially arranged with the through hole;

[0027] The upper end of the guide hole has a guide conical surface, and the diameter of the guide conical surface gradually decreases from top to bottom.

[0028] Preferably, the big head positioning assembly comprises a big head support seat, an inner wall abutting member and an outer wall abutting member;

[0029] The big head support seat is fixedly arranged on the base;

[0030] The inner wall abutting member is installed on the big head support seat and abuts against the inner wall surface of the big head hole.

[0031] The outer wall abutting member is mounted on the big end support seat and is used for abutting with the outer wall surface of the big end.

[0032] Preferably, the inner wall abutting member is provided with at least two and is distributed in a circumferential array about the central axis of the big end hole.

[0033] And / or,

[0034] The outer wall abutting member is provided with at least one, and at least one of the outer wall abutting members is arranged opposite to the inner wall abutting member.

[0035] Compared with the prior art, the beneficial effects of the utility model are that:

[0036] The connecting rod positioning and fixing device provided by the utility model can drive the small end pile head to axially slide along the through hole and the small end hole through the setting of the auxiliary positioning device, thereby increasing the positioning accuracy of the small end hole and the press fitting effect of the connecting rod and the bushing. Meanwhile, the connecting rod and the small end positioning assembly can be prevented from being displaced during the press fitting of the bushing and the connecting rod, further increasing the positioning accuracy of the small end hole and the press fitting effect of the connecting rod and the bushing. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0038] Figure 1 It is a structural schematic view of one of the examples of the utility model.

[0039] Figure 2 It is a structural schematic view of one of the examples of the utility model. Figure 1 It is a position schematic view of the bushing clamp.

[0040] Figure 3 It is a structural schematic view of one of the examples of the utility model. Figure 1 It is a structural schematic view from another perspective.

[0041] Figure 4 It is a structural schematic view of one of the examples of the utility model. Figure 3 It is a sectional view along A-A.

[0042] Figure 5 It is a structural schematic view of one of the examples of the utility model. Figure 4 It is an enlarged schematic view of D1 position.

[0043] Explanation of reference signs:

[0044] 100, connecting rod; 101, big end; 102, small end; 103, big end hole; 104, small end hole; 200, bushing clamp; 201, driving rod; 300, bushing; 1, base; 2, big end positioning assembly; 21, big end support seat; 22, inner wall abutting piece; 23, outer wall abutting piece; 3, small end positioning assembly; 30, through hole; 31, small end support seat; 32, first circumferential limiting block; 33, second circumferential limiting block; 34, guide support seat; 341, guide hole; 342, guide conical surface; 35, mounting frame; 4, auxiliary positioning device; 41, small end pile head; 411, conical guide section; 412, matching groove; 42, driving part. DETAILED DESCRIPTION

[0045] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0046] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0047] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0048] Referring to Figures 1 to 5The utility model embodiment provides a kind of connecting rod positioning fixing device, for positioning and fixing connecting rod 100, connecting rod 100 has big end 101 and small end 102, big end 101 has big head hole 103, small end 102 has small head hole 104.Specifically, connecting rod positioning fixing device includes base 1, big end positioning assembly 2, small end positioning assembly 3 and auxiliary positioning device 4;Wherein, big end positioning assembly 2 and small end positioning assembly 3 are all installed on base 1, and are used for positioning and fixing big end 101 and small end 102 respectively;Small end positioning assembly 3 has through hole 30, and through hole 30 is coaxially arranged with small head hole 104;Auxiliary positioning device 4 includes small end pile head 41 and driving part 42, the outer wall surface of small end pile head 41 is attached with the inner wall surface of small head hole 104 and the inner wall surface of through hole 30, and driving part 42 can drive small end pile head 41 axial slip along small head hole 104 and through hole 30.

[0049] It is not difficult to understand that in the above scheme, through the setting of auxiliary positioning device 4, its driving part 42 can drive its small end pile head 41 axial slip along through hole 30 and small head hole 104, to further increase the positioning accuracy of small head hole 104, increase the press fitting effect of connecting rod 100 and bush 300.Meanwhile, it can also avoid the displacement of connecting rod 100 and small end positioning assembly 3 during the press fitting of bush 300 and connecting rod 100, further increase the positioning accuracy of small head hole 104, increase the press fitting effect of press rod and bush 300.

[0050] It is worth mentioning that the above-mentioned "attach" means that the outer wall surface of small end pile head 41 and the inner wall surface of small head hole 104, the outer wall surface of small end pile head 41 and the inner wall surface of through hole 30 can contact each other, and at the same time, when small end pile head 41 moves axially along through hole 30 and small head hole 104, it will not generate large force to small end positioning assembly 3 and connecting rod 100 (i.e.

[0051] For the convenience of description, "up" in this embodiment is the upper end of the direction shown in Figure 1 , "down" is the lower end of the direction shown in Figure 1 .

[0052] Referring to Figures 1 to 5 , in order to avoid the influence of the installation of bush 300 by the setting of small end pile head 41, in this embodiment, the end of small end pile head 41 opposite to small head hole 104 has conical guide section 411;Conical guide section 411 gradually increases in diameter from top to bottom.

[0053] Further, the connecting rod positioning and fixing device is also used for cooperating with the bushing clamp 200 to realize the press fitting of the connecting rod 100 and the bushing 300. The upper end of the small head pile head 41 is provided with a matching groove 412, which is used for cooperating with the driving rod 201 at the lower end of the bushing clamp 200.

[0054] It can be understood that, in the initial state, the small head pile head 41 extends into the small head hole 104 to realize the positioning of the small head hole 104, and the bushing 300 is fixed on the bushing clamp 200. During the installation of the downward movement of the bushing 300, the bushing 300 gradually contacts the outer wall surface of the conical guide section 411 of the small head pile head 41, the driving rod 201 at the lower end of the bushing clamp 200 extends into the matching groove 412, the small head pile head 41 limits the driving rod 201 in the circumferential direction, the bushing 300 continues to move downward, the small head pile head 41 moves downward under the action of the driving part 42, and the positioning and installation of the bushing 300 are completed.

[0055] Further, the driving part 42 can be provided as an electric push rod, or a pneumatic cylinder, etc.

[0056] The small head positioning assembly 3 and the big head positioning assembly 2 can be provided in various structures, which can realize the positioning and fixing of the connecting rod 100.

[0057] Referring to Figures 1 to 5 In the embodiment, the small head positioning assembly 3 includes a small head support seat 31 fixedly installed on the base 1, and the upper end of the small head support seat 31 abuts against one side end surface of the connecting rod 100.

[0058] Further, the small head positioning assembly 3 further includes a first circumferential limiting block 32 and a second circumferential limiting block 33; the first circumferential limiting block 32 is installed on the base 1 and abuts against the outer side wall of the small head support seat 31; and the second circumferential limiting block 33 is installed on the first circumferential limiting block 32 and abuts against the outer side wall of the small head end 102.

[0059] Further, the second circumferential limiting block 33 is provided with a plurality of second circumferential limiting blocks 33, which are symmetrically arranged about the plane where the center axis of the big head hole 103 and the center axis of the small head hole 104 are located, so that the small head end 102 is more uniformly stressed and the positioning and fixing effect is better. Of course, in other embodiments, the plurality of second circumferential limiting blocks 33 are distributed along the circumferential direction of the small head end 102, and can be arranged according to the structure of the small head end 102, as long as the small head end 102 is more uniformly stressed.

[0060] Referring to Figures 1 to 5The small head positioning assembly 3 further comprises a guide support base 34 arranged opposite to the small head support base 31; the guide support base 34 is fixedly connected with the base 1 through a mounting frame 35; the guide support base 34 is abutted against a side end face of the connecting rod 100 away from the small head support base 31, so that the axial positioning of the small head end 102 can be realized through the cooperation of the small head support base 31 and the guide support base 34.

[0061] Further, the guide support base 34 is provided with a guide hole 341 coaxially arranged with the through hole 30; the guide hole 341 is provided with a guide conical surface 342 at the upper end, and the diameter of the guide conical surface 342 gradually decreases from top to bottom.

[0062] Referring to Figures 1 to 5 In the embodiment, the big head positioning assembly 2 comprises a big head support base 21, an inner wall abutting member 22 and an outer wall abutting member 23; the big head support base 21 is fixedly arranged on the base 1; the inner wall abutting member 22 is mounted on the big head support base 21 and is used for abutting against the inner wall surface of the big head hole 103; and the outer wall abutting member 23 is mounted on the big head support base 21 and is used for abutting against the outer wall surface of the big head end 101.

[0063] Further, the inner wall abutting member 22 is arranged in at least two and is arranged in a circular array about the central axis of the big head hole 103; the outer wall abutting member 23 is arranged in at least one, and the at least one outer wall abutting member 23 is arranged opposite to the inner wall abutting member 22, so as to increase the positioning and fixing effect of the big head end 101.

[0064] The above-mentioned embodiments are only preferred embodiments of the utility model, and cannot be used to limit the range of protection of the utility model; any non-substantial change and replacement made by the person skilled in the art on the basis of the utility model belongs to the range of protection required by the utility model.

Claims

1. A connecting rod positioning and fixing device for positioning and fixing a connecting rod (100), the connecting rod (100) having a big end (101) and a small end (102), the big end (101) having a big end hole (103), and the small end (102) having a small end hole (104); comprising a base (1), a big end positioning assembly (2), a small end positioning assembly (3) and an auxiliary positioning device (4); the big end positioning assembly (2) and the small end positioning assembly (3) are both mounted on the base (1) and are respectively used for positioning and fixing the big end (101) and the small end (102); the small end positioning assembly (3) has a through hole (30) coaxially arranged with the small end hole (104); the auxiliary positioning device (4) comprises a small end pile head (41) and a driving part (42), the outer wall surface of the small end pile head (41) is in close contact with the inner wall surface of the small end hole (104) and the inner wall surface of the through hole (30), and the driving part (42) can drive the small end pile head (41) to axially slide along the small end hole (104) and the through hole (30). characterized in that 2. The small end pile head (41) has a conical guide section (411) at one end facing the small end hole (104).

3. The conical guide section (411) gradually increases in diameter from top to bottom.

4. The small end pile head (41) is further used for cooperating with a bushing clamp (200) to realize press fitting of the connecting rod (100) and a bushing (300).

5. The upper end of the small end pile head (41) is provided with a matching groove (412) for cooperating with a driving rod (201) at the lower end of the bushing clamp (200).

2. A connecting rod positioning fixture as set forth in claim 1, wherein 6. The small end positioning assembly (3) comprises a small end support seat (31) fixedly mounted on the base (1), 7. The upper end of the small end support seat (31) is in abutment with one side end surface of the connecting rod (100).

3. A connecting rod positioning fixture as set forth in claim 1, wherein 8. The small end positioning assembly (3) further comprises a first circumferential limiting block (32) and a second circumferential limiting block (33).

9. The first circumferential limiting block (32) is mounted on the base (1) and is in abutment with the outer side wall of the small end support seat (31).

4. A connecting rod positioning fixture according to any one of claims 1-3, characterized in that 10. The second circumferential limiting block (33) is mounted on the first circumferential limiting block (32) and is in abutment with the outer side wall of the small end (102).

11. The second circumferential limiting block (33) is provided with a plurality of second circumferential limiting blocks (33).

5. A connecting rod positioning fixture as set forth in claim 4, wherein 12. The plurality of second circumferential limiting blocks (33) are circumferentially distributed along the small end (102), or the plurality of second circumferential limiting blocks (33) are symmetrically arranged about the plane in which the center axis of the big end hole (103) and the center axis of the small end hole (104) are located.

13. The small end positioning assembly (3) further comprises a guide support seat (34) arranged opposite to the small end support seat (31).

14. The guide support seat (34) is fixedly connected with the base (1) through a mounting frame (35).

6. A connecting rod positioning fixture as set forth in claim 5, wherein 15. The guide support seat (34) is in abutment with the side end surface of the connecting rod (100) away from the small end support seat (31). ​ 7. A connecting rod positioning fixture as set forth in claim 4, wherein ​ ​ ​ 8. A connecting rod positioning fixture as set forth in claim 7, wherein The guide support seat (34) has a guide hole (341) coaxially arranged with the through hole (30); The upper end of the guide hole (341) has a guide conical surface (342) which gradually decreases in diameter from top to bottom.

9. A connecting rod positioning fixture as set forth in claim 1, wherein, The big head positioning assembly (2) comprises a big head support seat (21), an inner wall abutting member (22) and an outer wall abutting member (23); The big head support seat (21) is fixedly arranged on the base (1); The inner wall abutting member (22) is installed on the big head support seat (21) and is used for abutting with the inner wall surface of the big head hole (103); The outer wall abutting member (23) is installed on the big head support seat (21) and is used for abutting with the outer wall surface of the big head end (101).

10. A connecting rod positioning fixture as set forth in claim 9, wherein, The inner wall abutting member (22) is at least provided with two and is distributed in a circular array about the central axis of the big head hole (103); And / or, The outer wall abutting member (23) is at least provided with one, and at least one of the outer wall abutting members (23) is arranged opposite to the inner wall abutting member (22).

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