Connecting rod assembly and engineering machinery

Abstract

The utility model relates to a connecting rod assembly and engineering machinery comprising the same. The connecting rod assembly is used for connecting a first part and a second part which are fixed in relative distance and variable in relative angle, and comprises a cylindrical connecting rod, a first end component and a second end component. The first end component is arranged at the first end of the connecting rod in a manner that the first end component can relatively rotate but cannot relatively translate, and is constructed to be hinged with the first component; the second end component is fixedly arranged at the second end of the connecting rod and can be hinged to the second component. According to the connecting rod assembly, only the first end component and the connecting rod are allowed to rotate relative to each other and not to translate relative to each other, so that the connection between the first component and the second component which are fixed in relative distance and variable in relative angle is facilitated, and the connecting rod assembly has the advantage of low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of parts of construction machinery, in particular to a connecting rod assembly and a construction machinery including the connecting rod assembly. Background Art

[0002] The working implements of construction machinery are usually driven by hydraulic cylinders or pneumatic cylinders. The hydraulic cylinder can not only be used as a driving device for the working implement, but also act as a connecting device for connecting the working implement to the vehicle frame. Taking a grader as an example, the blade of the grader can be placed in a common working position through a side shift hydraulic cylinder, and the side shift hydraulic cylinder usually includes a cylinder block and a piston rod that can expand and contract relative to the cylinder block. The blade can be hinged to the piston rod and is hinged to the vehicle frame of the grader via the side shift hydraulic cylinder (and lifting arms, etc.).

[0003] Since the piston rod of the hydraulic cylinder is prone to damage during long-term reciprocating motion, and the distance between the blade of the grader and the frame is basically fixed, it is known to use a welded fixing rod to replace the hydraulic cylinder to realize the hinged connection between the blade and the vehicle frame in order to save costs. However, due to the manufacturing errors of the welded parts, it may cause the situation that pins cannot be installed at both ends of the welded parts. Or, in order to ensure the manufacturing accuracy of the fixing rod, it is necessary to invest in tooling to ensure the relative angular tolerance of the hinge points at both ends, which will increase the cost. Moreover, when the fixing rod is used to connect moving parts, it may limit the rotation of the connected parts or cause damage to other parts.

[0004] Therefore, a connection support structure with a simplified structure and very low manufacturing, use and maintenance costs is needed to replace the hydraulic cylinder or pneumatic cylinder to realize the connection between two parts with a fixed relative distance and a variable relative angle, such as the blade and the vehicle frame of a grader. Summary of the Utility Model

[0005] The purpose of the utility model is to solve at least one of the above problems and / or other problems existing in the prior art.

[0006] To achieve the above purpose, according to one aspect of the utility model, a connecting rod assembly is provided for connecting a first part and a second part with a fixed relative distance and a variable relative angle. The connecting rod assembly includes a cylindrical connecting rod, a first end member, and a second end member. The first end member is rotatably but non-translatably arranged at the first end of the connecting rod and is configured to be hingedly connected to the first part; the second end member is fixedly arranged at the second end of the connecting rod and is configured to be hingedly connected to the second part.

[0007] According to an embodiment of the present utility model, the first end member includes a first end hinge head, an annular spacer, and a stop ring. The spacer is fixed on the connecting rod. The first end hinge head passes through the spacer and extends into the connecting rod. The stop ring is fixed on the end of the first end hinge head located inside the connecting rod. The stop ring is configured to abut against the spacer so as to axially define the position of the first end hinge head together with the spacer.

[0008] According to an embodiment of the present utility model, the outer diameter of the stop ring is greater than the inner diameter of the spacer, and the outer diameter of the portion of the first end hinge head that abuts against the spacer is greater than the inner diameter of the spacer.

[0009] According to an embodiment of the present utility model, the first end hinge head includes a first section, a second section, and a third section. The outer diameter of the first section is adapted to the inner diameter of the stop ring, and the outer diameter of the second section is adapted to the inner diameter of the spacer.

[0010] According to an embodiment of the present utility model, the outer diameter of the first section is smaller than the outer diameter of the second section, and a first step surface is formed between the first section and the second section. The first step surface is flush with the first end surface of the spacer and abuts against the stop ring.

[0011] According to an embodiment of the present utility model, the outer diameter of the second section is smaller than the outer diameter of the third section, and a second step surface is formed between the second section and the third section. The second step surface abuts against the second end surface of the spacer.

[0012] According to an embodiment of the present utility model, the second end member includes a second end hinge head.

[0013] According to an embodiment of the present utility model, the first end hinge head has a first pin hole whose central axis is perpendicular to the central axis of the first end hinge head, and the second end hinge head has a second pin hole whose central axis is perpendicular to the central axis of the second end hinge head.

[0014] According to another aspect of the present utility model, there is provided a construction machine, which includes a scraper blade and the connecting rod assembly as described above. The connecting rod assembly is hingedly connected between the scraper blade and the frame of the construction machine.

[0015] According to an embodiment of the present utility model, the construction machine is a grader.

[0016] The connecting rod assembly of the present utility model realizes the connection between two components or structures (such as the scraper blade and the frame of a grader) with a fixed relative distance and a variable relative angle by setting a first end member and a second end member at both ends of the connecting rod, with a fixed axial distance but capable of relative rotation. This connecting rod assembly has the advantages of low cost and convenient use. Description of the Drawings

[0017] The features and advantages of the present utility model will be clearly understood from the following detailed description provided with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and thus should not be regarded as limiting the present utility model, where:

[0018] Figure 1 A perspective view showing the connecting rod assembly according to an embodiment of the present utility model.

[0019] Figure 2 Shown Figure 1 An exploded view of the shown connecting rod assembly.

[0020] Figure 3 Shown Figure 1 A cross-sectional view of the shown connecting rod assembly along the central axis.

[0021] Description of the Reference Numerals:

[0022] 1. Connecting rod; 2. First end member; 21. First end hinge joint; 211. First section; 212. Second section; 213. Third section; 214. First step surface; 215. Second step surface; 216. First pin hole; 22. Spacer sleeve; 23. Stop ring; 3. Second end member; 31. Second pin hole. Detailed Description of the Embodiment

[0023] The embodiments of the present utility model will be described below with reference to the accompanying drawings. In the following description, many specific details are set forth in order to enable those skilled in the art to more fully understand and implement the present utility model. However, it is obvious to those skilled in the art that some of these specific details may not be required for the implementation of the present utility model. In addition, it should be understood that the present utility model is not limited to the specific embodiments described. On the contrary, the present utility model can be implemented by any combination of the features and elements described below, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments, and advantages are for illustrative purposes only and should not be regarded as elements or limitations of the claims, unless specifically recited in the claims.

[0024] In the following text, terms such as "first", "second", etc. are used to describe the elements of the present application. These terms are only used to distinguish each element and are not used to limit the nature, order or number of these elements. The terms "comprising" and "having" are used to mean an open inclusion, and mean that there may be additional elements / components in addition to the listed elements / components.

[0025] Figures 1-3 Fig. 4 shows a connecting rod assembly according to an embodiment of the present invention. The connecting rod assembly can be used to connect two components, namely a first component and a second component (not shown). The first component and the second component can be two components provided on two structures and requiring relative movement (such as swinging or rotating) freedom, such as the blade and the frame of a grader, especially two hinge mounting points respectively arranged on the blade and the frame. The relative distance between the first and second components is fixed, and the relative angle between them is variable. For example, the first component and the second component may be in different horizontal planes, or in a plane different from the plane in which the connecting rod assembly is located. Taking a grader as an example, the first component can be the original mounting point on the frame for mounting an oil cylinder, and the second component can be the original hinge point on the installed blade for hingedly connecting the oil cylinder. The mounting point and the hinge point may be in different horizontal planes after the blade is installed, or may move to different planes due to the swinging or rotating of the blade, so that the two are not completely in the same straight line as the axis of the connecting rod assembly, but have a certain relative angle with respect to the axis of the connecting rod assembly, resulting in difficulty in connecting both ends of the connecting rod assembly to the mounting point and the hinge point at the same time. Through the connecting rod assembly of this embodiment, the installation difficulty caused by this relative angle deviation is overcome.

[0026] As Figure 1 shown, the connecting rod assembly may include a connecting rod 1, a first end member 2 and a third end member 3. The connecting rod 1 has a tubular structure with openings at both ends, and includes a relative first end ( Figures 1-3 the right end in Fig. 10) and a second end ( Figures 1-3 the left end in Fig. 13). The first end member 2 is provided at the first end of the connecting rod 1 and is configured to be unable to translate relative to the connecting rod 1, but can rotate relative to the connecting rod 1. The second end member 3 is fixedly provided at the second end of the connecting rod 1. Thus, when the first end member 2 is hingedly connected to the first component through a pin shaft and the second end member 3 is hingedly connected to the second component through another pin shaft, the relative rotation between the first end member 2 and the connecting rod 1 can be used to make the first end member 2 adapt to the orientation of the pin hole of the first component, thereby making the second end member 3 adapt to the orientation of the pin hole of the second component.

[0027] Figure 2An exploded example of the connecting rod assembly according to this embodiment is shown. As Figure 2 shown, the first end member 2 may include a first end hinge head 21, a spacer sleeve 22, and a stop ring 23. The spacer sleeve 22 is annular and may be fixed to the right end of the connecting rod 1 by welding. The stop ring 23 is disposed within the connecting rod 1 and is fixedly connected, for example, by welding, to a section of the first end hinge head 2 that passes through the spacer sleeve 22 and extends into the connecting rod 1. Thus, through the abutting cooperation of the spacer sleeve 22 and the stop ring 23, the first end hinge head 21 cannot translate relative to the connecting rod 1, thereby axially defining the relative position of the first end hinge head 21 and the connecting rod 1.

[0028] Specifically, referring to Figure 2 and Figure 3 , the outer diameter of the stop ring 23 is greater than the inner diameter of the annular spacer sleeve 22, and the outer diameter of the portion of the first end hinge head 21 that abuts against the spacer sleeve 22 is also greater than the inner diameter of the spacer sleeve. Thus, the relative position of the first end hinge head 21 and the connecting rod 1 can be axially defined by sandwiching the spacer sleeve 22 between the stop ring 23 and the first end hinge head 21.

[0029] Of course, in some other embodiments, as an additional solution or alternative, circumferential or radial grooves for accommodating the stop ring 23 may be formed, for example, on the inner side of the right end of the connecting rod 1, or a flange extending inward may be formed at the end of the right end, so as to limit the movement of the stop ring 23 in the axial direction of the connecting rod 1 and, thereby, cooperate with the spacer sleeve 22 fixed to the connecting rod 1 to restrict the movement of the first end hinge head 21 in the axial direction of the connecting rod 1.

[0030] Continuing to refer to Figure 2 and Figure 3 , as a preferred embodiment, the first end hinge head 21 may include a first section 211, a second section 212, and a third section 213. The first section 211 extends into the connecting rod 1 and passes through the stop ring 23. The outer diameter of the first section 211 is adapted to the inner diameter of the stop ring 23, that is, the outer diameter of the first section 211 is equal to or slightly smaller than the inner diameter of the stop ring 23, facilitating, for example, fixing the first section 212 and the stop ring 23 by direct welding or filler welding, so that the first section 211 and the stop ring 23 maintain an unchanged relative position both axially and circumferentially. The second section 212 passes through the spacer sleeve 22. The outer diameter of the second section 212 is adapted to the inner diameter of the spacer sleeve 22, that is, the outer diameter of the second section 212 is equal to or slightly smaller than the inner diameter of the spacer sleeve 22, enabling the second section 212 to rotate relative to the spacer sleeve 22. The third section 213 is free, located outside the connecting rod 1, and has a first pin hole 216 at its end. Advantageously, the first section 211, the second section 212, and the third section 213 may be integrally formed.

[0031] Preferably, the outer diameters of the first section 211, the second section 212, and the third section 213 increase in sequence, whereby the first end hinge joint 21 can smoothly pass through the spacer sleeve 22 and the stop ring 23 in sequence. A first step surface 214 is formed between the first section 211 and the second section 212. The first step surface 214 extends radially along the first end hinge joint 21 and can be flush with the first end surface of the spacer sleeve 22 after the second section 212 passes through the spacer sleeve 22. Figure 2 and Figure 3 the left end surface in

[0032] . The first step surface 214 and the first end surface of the spacer sleeve 22 can both abut against the right end surface of the stop ring 23. Figure 2 and Figure 3 the right end surface in

[0033] . Similarly, a second step surface 215 extending radially along the first end hinge joint 21 is formed between the second section 212 and the third section 213. Thus, when the outer diameter of the second section 212 is adapted to the inner diameter of the spacer sleeve 22, the second step surface 215 can abut against the second end surface of the spacer sleeve 22 Figures 1 to 3 . Thereby, the spacer sleeve 22 is clamped by the combined action of the second step surface 215 and the right end surface of the stop ring 23. Subsequently, since the spacer sleeve 22 is fixed to the connecting rod 1, the translation of the first end hinge joint 21 in the axial direction of the connecting rod 1 is restricted.

[0034] According to an embodiment of the second end member 3, with reference to Figures 1 to 3 , the second end member 3 may include a second end hinge joint or be formed by a second end hinge joint. The right end of the second end hinge joint is partially inserted into the connecting rod 1, and the outer diameter of its right end portion is adapted to the inner diameter of the connecting rod 1, whereby it can be fixed to the connecting rod 1 by welding. The structure of the free left portion of the second end hinge joint located outside the connecting rod 1 is substantially the same as the portion of the first end hinge joint 21 located outside the spacer sleeve 22, whereby it can be adapted to the first and second components with the same structure.

[0034] Optionally, the free portion of the second end hinge joint located outside the connecting rod 1 has a second pin hole 31 at its end. The central axis of the second pin hole 31 is perpendicular to the longitudinal central axis of the second end hinge joint, that is, perpendicular to the axial direction of the connecting rod 1. Similarly, the central axis of the first pin hole 216 on the first end hinge joint 21 is perpendicular to the longitudinal central axis of the first end hinge joint 21, that is, perpendicular to the axial direction of the connecting rod 1. The central axis of the first end hinge joint 21, the central axis of the second end hinge joint, and the central axis of the connecting rod 1 are advantageously on the same straight line or parallel to each other. Thus, the central axes of the second pin hole 31 and the first pin hole 216 can be skew lines with an arbitrary included angle. When the first end hinge joint 21 is hinged to the first component by a pin shaft and the second end hinge joint is hinged to the second component by a pin shaft, the connecting rod assembly can be adapted to different relative angles between the first component and the second component by rotating the first end hinge joint 21 by an arbitrary angle.

[0035] The present utility model also provides a construction machinery including a scraper blade and the above-mentioned connecting rod assembly. The scraper blade is arranged along the transverse direction of the construction machinery, that is, the left-right direction, and first components or second components configured as mounting seats are respectively arranged on the left and right sides of the scraper blade. Preferably, the construction machinery is a motor grader.

[0036] Industrial applicability

[0037] The connecting rod assembly according to the present utility model is applicable to supporting and connecting the working implements of construction machinery, especially applicable to a motor grader with a scraper blade. The scraper blade needs to be supported and connected to the frame of the motor grader. However, it should be understood that the connecting rod assembly according to the present utility model can also be applicable to other devices with two components, and the relative distance between the two components is fixed, and their relative angles are variable.

[0038] In the connecting rod assembly of the present utility model, the first end member 2 and the second end member 3 are respectively arranged at both ends of the connecting rod 1, and the three cannot move relative to each other axially. In the circumferential direction, the first end member 2 can rotate relative to the connecting rod 1, and the second end member 3 is fixed relative to the connecting rod 1. Thus, only through the relative rotation of the first end member 2 and the connecting rod 1, the connection between the first component and the second component with a fixed relative distance and variable relative angles is realized. By replacing the oil cylinder in the prior art with this connecting rod assembly, the later use cost can be reduced. And the angle between the first end member 2 and the second end member 3 of this connecting rod assembly can be adjusted, which can avoid the situation of impossible installation caused by the manufacturing error of the welded fixed rod in the prior art.

[0039] In addition, by making the outer diameter of the stop ring 23 located at one end of the spacer sleeve 22 larger than the inner diameter of the spacer sleeve 22, and making the outer diameter of the portion (the third section 213, or more specifically, the second stepped surface 215) of the first end hinge joint 21 that abuts against the other end of the spacer sleeve 22 larger than the inner diameter of the spacer sleeve 22, it is possible to limit the axial movement of the first end hinge joint 21 relative to the connecting rod 1 while allowing relative rotation between the two when the stop ring 23 is fixedly connected to the first end hinge joint 21 and the spacer sleeve 22 is fixedly connected to the connecting rod 1.

[0040] For those skilled in the art, various modifications and variations can be made to the embodiments disclosed above without departing from the scope or spirit of the present invention. Based on the practice of the present invention disclosed in this specification, other embodiments of the present invention will be obvious to those skilled in the art. This specification and its disclosed examples should be considered illustrative only, and the true scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A connecting rod assembly for connecting a first component and a second component with a fixed relative distance and a variable relative angle, characterized in that: The connecting rod assembly comprises: A cylindrical connecting rod (1); A first end member (2), the first end member (2) is arranged at the first end of the connecting rod (1) so as to be relatively rotatable but not relatively translatable, and is configured to be hinged to the first component; and A second end member (3), wherein the second end member (3) is fixedly arranged at the second end of the connecting rod (1) and is configured to be hinged to the second component.

2. The connecting rod assembly according to claim 1, characterized in that: The first end member (2) comprises a first end hinge joint (21), an annular spacer (22) and a stop ring (23), wherein the spacer (22) is fixed on the connecting rod (1), the first end hinge joint (21) passes through the spacer (22) and extends into the connecting rod (1), the stop ring (23) is fixed on the end of the first end hinge joint (21) located inside the connecting rod (1), and is configured to abut against the spacer (22) so as to limit the position of the first end hinge joint (21) in the axial direction together with the spacer (22).

3. The connecting rod assembly according to claim 2, characterized in that: The outer diameter of the stop ring (23) is greater than the inner diameter of the spacer (22), and the outer diameter of the portion of the first end hinged joint (21) that abuts against the spacer (22) is greater than the inner diameter of the spacer (22).

4. The connecting rod assembly according to claim 3, characterized in that: The first end hinge joint (21) comprises a first section (211), a second section (212) and a third section (213), wherein the outer diameter of the first section (211) is adapted to the inner diameter of the stop ring (23), and the outer diameter of the second section (212) is adapted to the inner diameter of the spacer (22).

5. The connecting rod assembly according to claim 4, characterized in that: The outer diameter of the first section (211) is smaller than the outer diameter of the second section (212), and a first step surface (214) is formed between the first section (211) and the second section (212), and the first step surface (214) is flush with the first end surface of the spacer (22) and abuts against the stop ring (23).

6. The connecting rod assembly according to claim 4, characterized in that: The outer diameter of the second section (212) is smaller than the outer diameter of the third section (213), and a second step surface (215) is formed between the second section (212) and the third section (213), and the second step surface (215) abuts against the second end surface of the spacer (22).

7. The connecting rod assembly according to any one of claims 2 to 6, characterized in that: The second end member (3) comprises a second end hinged joint.

8. The connecting rod assembly according to claim 7, characterized in that: The first end hinge head (21) has a first pin hole (216), the central axis of which is perpendicular to the central axis of the first end hinge head (21); the second end hinge head has a second pin hole (31), the central axis of which is perpendicular to the central axis of the second end hinge head.

9. An engineering machine, characterized in that: The construction machine comprises a blade and a connecting rod assembly according to any one of claims 1 to 8.

10. The construction machine according to claim 9, characterized in that: The construction machine is a motor grader.

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