Fixing pin assembly convenient to limit
By designing a fixed pin assembly that is easy to limit, the displacement and friction loss problems caused by model mismatch during installation of excavator parts are solved, achieving a more stable and universal connection effect, and simplifying the maintenance process.
Patent Information
- Application Number
- CN202421384140.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-18
AI Technical Summary
When installing existing excavator parts, they need to match equipment of different models and specifications, resulting in displacement problems during superimposed use, affecting the connection effect; at the same time, the friction between the shaft pin and the shaft seat leads to metal loss, and lubricating oil needs to be added regularly, but maintenance is cumbersome.
A fixed pin assembly for easy limiting is designed, including an outlet seat, an internal pin seat, an adjustment screw and a limiting member. The ball structure reduces wear and is used to adapt to equipment of different specifications. The limiting member accurately defines the position and is lubricated through a lubricating hole without disassembly.
It effectively reduces wear between shaft pins and contact parts, improves the stability and versatility of the connection, simplifies the maintenance process, and extends the service life of the parts.
Smart Images
Figure CN222666903U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of excavator parts, in particular to a fixing pin assembly which is convenient for limiting position. Background Art
[0002] An excavator, also known as an excavator or backhoe, is an earth-moving machine that uses a bucket to dig materials above or below the supporting surface and load them into transport vehicles or unload them to a stockpile.
[0003] The connecting shaft seat is a component on the excavator used to install and fix the shaft pin. It usually has a specific shape and installation structure, connecting the internal parts of the excavator. For example, the bucket or the dipper arm will be connected by the connecting shaft seat to provide stable support while allowing the two to rotate or move relative to each other.
[0004] In the process of realizing the utility model, the inventors found that the prior art had the following problems: 1. At present, such parts need to be appropriately supplemented with gaskets during installation because they need to match excavators of different models and specifications. However, the gaskets will be displaced during the overlapping use, thereby affecting the connection effect between the bucket and the dipper arm; 2. Since the axle pins, axle seats and other components move relative to each other, the friction of the metal will increase, causing loss. Therefore, it is necessary to regularly add lubricating oil for maintenance to increase the service life of the parts. However, most of them can only be maintained after disassembly, which is cumbersome for regular maintenance. Utility Model Content
[0005] The purpose of the utility model is to provide a fixing pin assembly that is easy to limit, so as to solve the problem that the gaskets are appropriately used to supplement the parts in the installation for adaptation, and the gaskets will be displaced during the overlapping use, and the problem that they must be disassembled for maintenance. To achieve the above purpose, the utility model provides the following technical solutions: a fixing pin assembly that is easy to limit, including an outer pin seat, the outer pin seat is connected to the inner pin seat through a compression spring provided on its inner wall, the inner wall of the outer pin seat is penetrated and threaded with an adjusting screw, one end of the adjusting screw is rotatably connected to one side of the inner pin seat, an axle pin is penetrated and inserted between the outer pin seat and the inner pin seat, first limiting pieces are respectively provided at both ends of the outer wall of the inner pin seat, the inner wall of the outer pin seat is provided with a second limiting piece arranged opposite to the first limiting piece, the first limiting piece and the second limiting piece are respectively sleeved on the two ends of the outer wall of the axle pin, the outer wall of the outer pin seat is respectively threaded with a shaft head fixing cover, and the tops of the outer pin seat and the inner pin seat are respectively provided with lubrication holes.
[0006] The first limiting member includes a fixed ring and a movable ring, one end of the bottom of the fixed ring is welded to one side of the outer wall of the inner pin seat, the fixed ring is connected to the movable ring through a hinge, and the tops of the fixed ring and the movable ring are respectively welded with a mortise and a tenon, and the tenon is plugged into the inside of the mortise.
[0007] Further preferably, the surfaces of the outer pin seat and the inner pin seat are respectively penetrated by through holes for inserting and connecting the axle pins, and the inner walls of the through holes are provided with ball bearings, and the first limit members are respectively fitted and connected to both sides of the outer wall of the inner pin seat through hole, and the second limit member is fitted and connected to one side of the inner wall of the outer pin seat through hole.
[0008] Further preferably, the inner pin seats are configured to move relative to each other inside the outer pin seats via an adjusting screw, and the adjusting screw is located on one side of the outer wall of the outer pin seat and is respectively threadedly connected with a hexagonal nut.
[0009] Further preferably, the axle pin is thick in the middle and gradually becomes thinner evenly towards both sides, and the diameter of the through hole provided on the surfaces of the outer pin seat and the inner pin seat for plugging in the axle pin is consistent with the maximum diameter width of the axle pin, and the inner part of the shaft head fixing cover is sleeved on the outer walls at both ends of the shaft pin shaft head, and at the same time, the outer wall of the shaft head fixing cover is threadedly connected to the inner wall of the through hole outside the outer pin seat.
[0010] Further preferably, the lubrication hole is connected with the through holes for inserting the shaft pins which are respectively opened on the surfaces of the outer pin seat and the inner pin seat correspondingly, and a rubber plug is inserted and connected to the top of the lubrication hole.
[0011] Further preferably, the structure of the second limit member is consistent with that of the first limit member, and rubber pads are glued to the surfaces of the fixed ring and the movable ring respectively, and the movable ring forms an opening and closing structure with the fixed ring through a hinge, and the mortise and tenon are threadedly connected to the two ends of the outer wall of the inner pin seat by bolts.
[0012] Compared with the prior art, the utility model has the following beneficial effects:
[0013] In the utility model, the ball structure in the through holes of the outer pin seat and the inner pin seat effectively reduces the wear of the shaft pin when they contact each other respectively, helps to maintain the stability of the shaft pin rotation, and improves the smoothness between external connection equipment. At the same time, the spacing between the inner pin seats can be changed by adjusting the screw, so as to better adapt to buckets or dipper arm assemblies of different specifications, increase the versatility and flexibility of the connection, and the compression springs at both ends of the inner pin seat can play a buffering role during adjustment during the movement, and at the same time maintain the appropriate pressure value between the inner pin seat and the outer pin seat to ensure the stability of the connection. The hexagonal nut on the outside of the adjusting screw further serves as a tightening and limiting structure to avoid the problem of the adjusting screw rotating in the subsequent linkage process, thereby affecting the displacement of the inner pin seat.
[0014] In the utility model, compared with the general cylindrical axle pin, the structural form of the axle pin can provide a larger contact area and supporting force at the connection position, making the connection more stable and reducing the possibility of loosening of the middle part. The first limit member and the second limit member are respectively fixed to the outside of the outer pin seat and the inner pin seat through a threaded structure and are simultaneously covered on the outside of the axle pin, reducing the possibility of shaking and displacement. The position of the axle pin can be limited more accurately, avoiding the risk of displacement caused by repeated addition of gaskets and eliminating potential adverse factors. The open and close structure provides favorable conditions for the installation of the axle pin and the fixation after installation. The structure of the lubrication hole allows the addition of lubricating oil without disassembling various components, greatly saving maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;
[0016] Figure 2 This is a schematic diagram of the structure of the inner pin seat of the utility model;
[0017] Figure 3 This is a schematic diagram of the lubrication hole distribution structure of the utility model;
[0018] Figure 4 This is a schematic diagram of the structure of the first limiting member of the utility model;
[0019] Figure 5 This is a schematic diagram of the distribution structure of the shaft head fixing cover of the utility model.
[0020] In the figure: 1. outer pin seat; 2. compression spring; 3. inner pin seat; 4. adjusting screw; 5. shaft pin; 6. first limit piece; 601. fixing ring; 602. movable ring; 603. mortise and tenon; 604. tenon; 7. second limit piece; 8. shaft head fixing cover; 9. lubrication hole. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the utility model.
[0022] See also Figures 1 to 5The utility model provides a technical solution: a fixed pin assembly that is convenient for limiting, including an outer pin seat 1, the outer pin seat 1 is connected to the inner pin seat 3 through a compression spring 2 provided on its inner wall, the inner wall of the outer pin seat 1 passes through and is threadedly connected with an adjusting screw 4, one end of the adjusting screw 4 is rotatably connected to one side of the inner pin seat 3, an axle pin 5 passes through and is inserted between the outer pin seat 1 and the inner pin seat 3, first limiting members 6 are respectively provided at both ends of the outer wall of the inner pin seat 3, a second limiting member 7 opposite to the first limiting member 6 is provided on the inner wall of the outer pin seat 1, the first limiting member 6 and the second limiting member 7 are respectively sleeved on the two ends of the outer wall of the axle pin 5, the outer wall of the outer pin seat 1 is respectively threadedly connected with a shaft head fixing cover 8, and lubrication holes 9 are respectively provided on the tops of the outer pin seat 1 and the inner pin seat 3.
[0023] The first limiting member 6 includes a fixed ring 601 and a movable ring 602. One end of the bottom of the fixed ring 601 is welded to one side of the outer wall of the inner pin seat 3. The fixed ring 601 is connected to the movable ring 602 through a hinge. The tops of the fixed ring 601 and the movable ring 602 are respectively welded with a tenon 603 and a tenon 604, and the tenon 604 is plugged into the inside of the tenon 603.
[0024] In this embodiment, Figure 1 , Figure 2 and Figure 5 As shown, the surfaces of the outer pin seat 1 and the inner pin seat 3 are respectively penetrated by through holes for inserting and connecting the axle pin 5, and the inner walls of the through holes are provided with balls, and the first limit members 6 are respectively fitted and connected to the two sides of the outer walls of the through holes of the inner pin seat 3, and the second limit member 7 is fitted and connected to one side of the inner wall of the through hole of the outer pin seat 1; the ball structure in the through hole effectively reduces the wear of the axle pin 5 when it contacts the outer pin seat 1 and the inner pin seat 3 respectively, and at the same time helps to maintain the stability of the rotation of the axle pin 5 and improve the smoothness between external connection devices.
[0025] In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, the inner pin seats 3 constitute relative movement inside the outer pin seat 1 through the adjusting screw 4, and the adjusting screw 4 is located on one side of the outer wall of the outer pin seat 1 and is threadedly connected with a hexagonal nut; since the equipment is used to connect buckets and boom assemblies of different specifications and models, the spacing between the inner pin seats 3 can be changed by adjusting the screw 4, so that it can better adapt to buckets or boom assemblies of different specifications, increase the versatility and flexibility of the connection, and at the same time, due to its heavy bearing capacity, the compression springs 2 at both ends of the inner pin seat 3 during movement can play a buffering role during adjustment, while maintaining an appropriate pressure value between the inner pin seat 3 and the outer pin seat 1 to ensure the stability of the connection, providing a basic element for the movement between subsequent components, and the hexagonal nut outside the adjusting screw 4 further plays a fastening and limiting structure to avoid the problem of the adjusting screw 4 rotating during the subsequent linkage process, thereby affecting the displacement of the inner pin seat 3.
[0026] In this embodiment, Figure 1 and Figure 5 As shown, the axle pin 5 is thick in the middle and gradually becomes thinner evenly towards both sides, and the diameter of the through hole for inserting the axle pin 5 provided on the surfaces of the outer pin seat 1 and the inner pin seat 3 is consistent with the maximum diameter width of the axle pin 5, and the inner part of the shaft head fixing cover 8 is sleeved on the outer walls of the two ends of the shaft head of the axle pin 5, and the outer wall of the shaft head fixing cover 8 is threadedly connected to the inner wall of the through hole outside the outer pin seat 1; compared with the general cylindrical axle pin 5, the structural form of the axle pin 5 can provide a larger contact area and supporting force at the connection part, making the connection more stable and reducing the possibility of loosening of the middle part, and the thinned parts at both ends are fixed with the second limit piece 7 of the external threaded structure to further enhance the fastening effect, and the large-sized hole diameter on the surface of the outer pin seat 1 and the inner pin seat 3 is also convenient for the installation of the axle pin 5.
[0027] In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, the lubrication hole 9 is respectively connected with the through holes for plugging in the axle pin 5 opened corresponding to the surfaces of the outer pin seat 1 and the inner pin seat 3, and the top of the lubrication hole 9 is plugged and connected with a rubber plug; compared with the complicated disassembly and maintenance method, the structure of the lubrication hole 9 can add lubricating oil without disassembling various components, which greatly saves maintenance time. The oil filling and maintenance can be carried out at any time as needed to ensure the good lubrication state and extend the service life of the components. At the same time, the rubber plug on the top can maintain the good sealing of the lubrication hole 9 to prevent impurities from entering the inside.
[0028] In this embodiment, Figure 4 As shown, the structure of the second limit member 7 is consistent with the first limit member 6, and the surfaces of the fixed ring 601 and the movable ring 602 are respectively glued and connected with rubber pads, and the movable ring 602 forms an opening and closing structure with the fixed ring 601 through a hinge, and the tenon 603 and the tenon 604 are threadedly connected to the two ends of the outer wall of the inner pin seat 3 by bolts; the first limit member 6 and the second limit member 7 are respectively installed on the surface of the through hole connected to the shaft pin 5, and the first limit member 6 can move with the inner pin seat 3, and they are respectively fixed to the outside of the outer pin seat 1 and the inner pin seat 3 through a threaded structure and are covered on the outside of the shaft pin 5, reducing the possibility of shaking and displacement, and can more accurately limit the position of the shaft pin 5, avoiding the displacement risk caused by repeated addition of gaskets, eliminating potential adverse factors, and the opening and closing structure of the first limit member 6 and the second limit member 7 provides favorable conditions for the installation of the shaft pin 5 and the fixation after installation.
[0029] The use method and advantages of the utility model: When the fixing pin assembly that is convenient for limiting is used, the working process is as follows:
[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, firstly, the distance of the inner pin seat 3 is adjusted according to the specifications of the bucket and dipper arm assembly to be assembled, and the cross hole on the surface of the adjusting screw 4 is connected with the cross hole by an external auxiliary tool such as an electric screwdriver to adjust the moving distance of the inner pin seat 3 by rotating the adjusting screw 4, so that it is respectively fitted and close to the mounting groove on the surface of the bucket or dipper arm, and then the hexagonal nut is used to thread and fix it on the outside of the adjusting screw 4, and two sets of shaft pins 5 are respectively inserted from one side of the outer pin seat 1 to connect all the parts through, and the shaft pins 5 are fixed inside in advance by the first limiter 6. The first limiter 6 rotates the movable ring 602 when in use, and when it is closed with the fixed ring 601, the tenon 604 will be correspondingly inserted into the inside of the tenon groove 603, and the threaded through holes corresponding to the tenon 604, the tenon groove 603 and the outer wall of the inner pin seat 3 are fixed by bolts, and the structure of the second limiter 7 is the same as that of the first limiter 6. The bearing cap 8 is consistent with the bearing cap 6, which is fixed to the inner wall of the outer pin seat 1 by bolt threads, and finally the shaft head fixing cover 8 is sleeved on the shaft head outside the shaft pin 5, and is threadedly connected to the inner wall of the through hole of the outer pin seat 1 for inserting the shaft pin 5 to complete the assembly. During use, the ball structure in the through hole effectively reduces the wear of the shaft pin 5 when it contacts the outer pin seat 1 and the inner pin seat 3 respectively, and at the same time helps to maintain the stability of the rotation of the shaft pin 5 and improve the smoothness between external connection devices. At the same time, the structural form of the shaft pin 5 can provide a larger contact area and supporting force at the connection part, making the connection more stable and reducing the possibility of loosening in the middle part. During daily regular maintenance, the wooden plug on the surface of the lubrication hole 9 is removed and lubricating oil is added through the lubrication hole 9. The oil will flow into the through holes of the outer pin seat 1 and the inner pin seat 3 for inserting the shaft pin 5 to ensure the friction strength when in contact, ensure the good lubrication state and extend the service life of the components.
[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Technical staff in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A fixed pin assembly for facilitating position limiting, comprising an outer pin seat (1), characterized in that: The outer pin seat (1) is connected to the inner pin seat (3) through a compression spring (2) provided on its inner wall, the inner wall of the outer pin seat (1) is penetrated by an adjusting screw (4) and is threadedly connected, one end of the adjusting screw (4) is rotatably connected to one side of the inner pin seat (3), an axle pin (5) is penetrated and inserted between the outer pin seat (1) and the inner pin seat (3), first limiting members (6) are provided at both ends of the outer wall of the inner pin seat (3), the inner wall of the outer pin seat (1) is provided with a second limiting member (7) arranged opposite to the first limiting member (6), the first limiting member (6) and the second limiting member (7) are respectively sleeved on the two ends of the outer wall of the axle pin (5), the outer wall of the outer pin seat (1) is respectively threadedly connected with a shaft head fixing cover (8), and lubrication holes (9) are respectively provided on the tops of the outer pin seat (1) and the inner pin seat (3); The first limiting member (6) comprises a fixed ring (601) and a movable ring (602), one end of the bottom of the fixed ring (601) is welded to one side of the outer wall of the inner pin seat (3), the fixed ring (601) is connected to the movable ring (602) via a hinge, and the tops of the fixed ring (601) and the movable ring (602) are respectively welded with a tenon groove (603) and a tenon (604), and the tenon (604) is plugged into the inside of the tenon groove (603).
2. The fixing pin assembly for facilitating position limiting according to claim 1, characterized in that: The surfaces of the outer pin seat (1) and the inner pin seat (3) are respectively penetrated by through holes for inserting and connecting the shaft pin (5), and the inner walls of the through holes are provided with balls, and the first limiting member (6) is respectively connected to the two sides of the outer wall of the through hole of the inner pin seat (3), and the second limiting member (7) is connected to one side of the inner wall of the through hole of the outer pin seat (1).
3. The fixing pin assembly for facilitating position limiting according to claim 1, characterized in that: The inner pin seats (3) are relatively movable inside the outer pin seats (1) via the adjusting screw rods (4), and the adjusting screw rods (4) are located on one side of the outer wall of the outer pin seats (1) and are respectively threadedly connected with hexagonal nuts.
4. The fixing pin assembly for facilitating position limiting according to claim 1, characterized in that: The shaft pin (5) is thick in the middle and gradually becomes thinner towards both sides, and the diameter of the through hole for inserting the shaft pin (5) is formed on the surface of the outer pin seat (1) and the inner pin seat (3), and is consistent with the maximum diameter width of the shaft pin (5), and the inner part of the shaft head fixing cover (8) is sleeved on the outer wall of the two ends of the shaft head of the shaft pin (5), and the outer wall of the shaft head fixing cover (8) is threadedly connected to the inner wall of the through hole outside the outer pin seat (1).
5. The fixing pin assembly for facilitating position limiting according to claim 1, characterized in that: The lubrication hole (9) is connected to the through holes for inserting the shaft pin (5) respectively provided on the surfaces of the outer pin seat (1) and the inner pin seat (3) correspondingly, and a rubber plug is inserted and connected to the top of the lubrication hole (9).
6. The fixing pin assembly for facilitating position limiting according to claim 1, characterized in that: The structure of the second limiting member (7) is consistent with that of the first limiting member (6), and rubber pads are glued to the surfaces of the fixed ring (601) and the movable ring (602), and the movable ring (602) forms an opening and closing structure with the fixed ring (601) through a hinge, while the mortise (603) and the tenon (604) are threadedly connected to the two ends of the outer wall of the inner pin seat (3) through bolts.