An auxiliary positioning jig and excavator

Abstract

The utility model discloses a kind of auxiliary positioning fixture and excavator, belong to excavator assembly technical field, to solve the problem of boom steel pipe installation efficiency is not high, including: fixture frame, clamping assembly and positioning assembly, fixture frame is cooperated with boom root pipe clamp mounting seat, it is equipped with guiding assembly on it;Clamping assembly includes screw shaft installed on fixture frame, bearing seat connected on screw shaft, connecting seat connected on guiding assembly and with bearing seat axial correspondence, four connecting rods of bearing seat and connecting seat two sides respectively installed and first pressing plate and second pressing plate respectively close in four connecting rods end portion setting and installed on guiding assembly;Positioning assembly is installed on one side of fixture frame, including linear module installed on fixture frame far from one end of screw shaft and positioning baffle installed on linear module.The utility model can improve steel pipe assembly operation efficiency, reduce the labor intensity of worker.

Description

Technical Field

[0001] This utility model relates to an auxiliary positioning fixture and an excavator, belonging to the field of excavator assembly technology. Background Technology

[0002] Four hydraulic steel pipes are typically installed on the excavator boom to connect the main valve and the working cylinder. The pipes are arranged in pairs on the left and right sides of the boom. The assembly of the steel pipes generally involves the following steps: installing the lower half of the pipe clamp onto the pipe clamp mounting base, then roughly placing the steel pipes in the corresponding positions; adjusting the position of the steel pipes so that the ends of the four steel pipes are aligned and the overall axial position conforms to the design position on the general assembly drawings, in order to ensure the assemblability of the remaining hydraulic lines at both ends of the steel pipes and the consistency and aesthetics of the product.

[0003] During installation, the upper part of the pipe clamp is installed using bolts. The bolts are pre-tightened to secure the steel pipe. During pre-tightening, the steel pipe is observed for any movement; its position is fine-tuned, the bolts are tightened, and the pipe is locked in place. This process presents the following challenges: the four steel pipes have a large spatial span, and there are no positioning points at either end of the pipes, making it difficult to accurately determine the pipe's own installation position and its relative position to other pipes; during the pre-tightening of the pipe clamp, the lack of positioning points on both sides makes the steel pipe prone to movement, and readjusting the pipe's position is time-consuming and laborious. In summary, the installation process of hydraulic steel pipes suffers from poor installation accuracy and time-consuming and laborious adjustments to the installation position.

[0004] Therefore, there is an urgent need to research an auxiliary positioning fixture and excavator to solve the technical problem of its difficult installation. Utility Model Content

[0005] Purpose of the utility model: The purpose of this utility model is to overcome the shortcomings of the prior art and provide an auxiliary positioning fixture and excavator. When assembling the hydraulic steel pipe of the boom, the fixture frame is placed and the clamping components on the fixture frame and the steel pipe positioning components are used to clamp and position the steel pipe, thereby improving the efficiency of steel pipe assembly and reducing the labor intensity of workers.

[0006] To solve the above-mentioned technical problems, this utility model is implemented using the following technical solution: In a first aspect, this utility model provides an auxiliary positioning fixture suitable for excavator assembly, comprising: A clamp frame mates with a boom root pipe clamp mounting base, and a guide assembly is provided on the clamp frame; The clamping assembly includes a threaded shaft mounted on a clamping frame, a bearing housing connected to the threaded shaft, a connecting seat connected to a guide assembly and axially corresponding to the bearing housing, four connecting rods mounted on both sides of the bearing housing and the connecting seat, and a first pressure plate and a second pressure plate respectively located near the ends of the four connecting rods and mounted on the guide assembly. The positioning assembly, mounted on one side of the fixture frame, includes a linear module mounted on the end of the fixture frame away from the threaded shaft and a positioning baffle mounted on the linear module.

[0007] Optionally, the guide assembly includes an internally threaded tube installed at one end of the clamp frame, a first guide post and a second guide post respectively installed at both ends of the clamp frame, two guide beams symmetrically installed inside the clamp frame, and a first guide block and a second guide block respectively disposed on the two guide beams.

[0008] Optionally, the internally threaded tube is screwed to the threaded shaft; The first guide post is located below the threaded shaft and connected to the bearing housing; the second guide post is axially corresponding to the first guide post and connected to the connecting seat. The first guide block and the second guide block are respectively provided with connecting grooves that are adapted to the two ends of the first pressure plate, for detachable connection between the first pressure plate and the guide block; The bottom of the second pressure plate is provided with a sliding groove that is compatible with the guide beam; The four connecting rods are provided with pin holes at both ends for hinge connection with the bearing seat, connecting seat, first pressure plate and second pressure plate via pin shafts.

[0009] This causes the threaded shaft to rotate, and the rotational force drives the bearing housing to translate along the X-axis. During the translation of the bearing housing, the two connecting rods close to the bearing housing rotate. The rotational force is transmitted through the two connecting rods to drive the guide block, the first pressure plate, and the second pressure plate to move relative to each other along the Y-axis. Finally, the two ends of the first and second pressure plates move synchronously. During the synchronous movement, the guide block and the two connecting rods at the other end move accordingly, ultimately achieving the clamping and loosening of the pipe clamp mounting seat by the first and second pressure plates.

[0010] Optionally, the linear module includes a fixed seat mounted on one side of the clamp frame and near the connecting seat end, a lead screw assembly mounted on the fixed seat, a servo motor connected to the end of the lead screw assembly, a sliding seat mounted on the lead screw assembly, and a sliding seat connected to the sliding seat. The sliding seat is connected to the positioning baffle.

[0011] Optionally, the linear module includes a mounting base installed on one side of the fixture frame and near the connecting seat end, a slide rail connected to the mounting base, a cylinder connected to the mounting base, and a slider installed at the cylinder output end and slidably mounted on the slide rail. The slider is connected to the positioning baffle.

[0012] Optionally, the positioning baffle is equipped with a positioning groove that is compatible with the steel pipe.

[0013] Optionally, a handle is connected to the end of the threaded shaft away from the bearing housing.

[0014] Secondly, this utility model provides an excavator in which the boom root of the medium-sized excavator is assembled with steel pipes using the aforementioned auxiliary positioning fixture.

[0015] Beneficial effects: Compared with the prior art, this utility model has the following advantages: A clamp frame is placed at the base of the boom, and the various components are installed and fixed through the clamp frame. The clamping assembly and the steel pipe positioning assembly are used to clamp the pipe clamp mounting base and position the steel pipe on the pipe clamp mounting base. This provides positioning support for the assembly of multiple steel pipes on the pipe clamp mounting base, improves the efficiency of steel pipe assembly operations, and reduces the labor intensity of workers.

[0016] The linear module can drive the positioning baffle to adjust the position of the positioning support point according to various types and sizes of steel pipes, meeting the usage requirements of various models; the positioning baffle can prevent the steel pipe on it from moving axially during the pre-tightening process of the pipe clamp mounting seat. Attached Figure Description

[0017] Figure 1 The diagram shown is a structural diagram of the auxiliary positioning fixture of this utility model applicable to excavator assembly; Figure 2 The figure shown is an embodiment of the auxiliary positioning fixture of this utility model applicable to excavator assembly.

[0018] In the figure: 1. Fixture frame, 2. Threaded shaft, 3. Bearing seat, 4. Connecting rod, 5. First pressure plate, 6. Connecting seat, 7. Guide block, 8. Second pressure plate, 9. Screw assembly, 10. Positioning baffle, 11. Hydraulic steel pipe, 12. Pipe clamp mounting seat, 13. Servo motor, 14. Internal threaded pipe, 15. First guide post, 16. Second guide post. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Example

[0020] This embodiment provides an auxiliary positioning fixture and an excavator, such as Figure 1 and 2As shown, the fixture includes: a clamping frame 1, a clamping assembly, and a positioning assembly; wherein, the clamping frame 1 cooperates with the boom root pipe clamp mounting seat 12, and the clamping frame 1 is provided with a guide assembly; the clamping assembly includes: a threaded shaft 2, a bearing seat 3, a connecting seat 6, four connecting rods 4, a first pressure plate 5, and a second pressure plate 8; the threaded shaft 2 is mounted on the clamping frame 1, the bearing seat 3 is connected to the threaded shaft 2, the connecting seat 6 is connected to the guide assembly and is axially corresponding to the bearing seat 3, the four connecting rods 4 are respectively mounted in pairs on both sides of the bearing seat 3 and both sides of the connecting seat 6, the two ends of the first pressure plate 5 and the second pressure plate 8 are respectively connected to the four connecting rods 4, and the first pressure plate 5 and the second pressure plate 8 are slidably mounted on the guide assembly; the positioning assembly is mounted on one side of the clamping frame 1 and includes: a linear module and a positioning baffle 10; the linear module is mounted on the end of the clamping frame 1 away from the threaded shaft 2, and the positioning baffle 10 is mounted on the linear module, thereby performing linear motion under the drive of the linear module.

[0021] Optionally, the guide assembly includes: an internally threaded tube 14, a first guide post 15, a second guide post 16, a guide beam, a first guide block 7, and a second guide block 7; wherein, the internally threaded tube 14 is installed at one end of the clamp frame 1, the first guide post 15 and the second guide post 16 are respectively installed at both ends of the clamp frame 1, the two guide beams are symmetrically installed in the clamp frame 1, and the first guide block 7 and the second guide block 7 are slidably connected to the two guide beams respectively; the clamp frame 1 is provided with a guide groove, and the two guide beams are placed at the edge of the guide groove to limit the sliding direction of the guide block 7, while the guide groove can facilitate the insertion and removal of the clamp.

[0022] Optionally, the internally threaded tube 14 is screwed to the threaded shaft 2, thereby enabling the threaded shaft 2 to rotate and move within the fixture frame 1.

[0023] The first guide post 15 is located below the threaded shaft 2 and is connected to the bearing seat 3. The second guide post 16 is axially corresponding to the first guide post 15 and is connected to the connecting seat 6. At the same time, during use, the first guide post 15 and the second guide post 16 are always pressed against the pipe clamp mounting seat 12, which can balance the force and reduce the risk of deformation due to uneven force.

[0024] The first guide block 7 and the second guide block 7 are respectively provided with connecting grooves that are adapted to the two ends of the first pressure plate 5, for detachable connection between the first pressure plate 5 and the guide block 7. The detachable structure of the first pressure plate 5 can reduce the time for inserting and removing the fixture and optimize the process when inserting and removing the fixture.

[0025] The bottom of the second pressure plate 8 is provided with a sliding groove that is compatible with the guide beam. The second pressure plate 8 is designed as an integral piece and combined with the detachable first pressure plate 5, which greatly improves the assembly efficiency and shortens the operation cycle.

[0026] The four connecting rods 4 are provided with pin holes at both ends for hinged connection with bearing seat 3, connecting seat 6, first pressure plate 5 and second pressure plate 8 via pin shafts; the hinged connection of the four connecting rods 4 with bearing seat 3, connecting seat 6 and first pressure plate 5 and second pressure plate 8 respectively enables the coordinated movement of multiple components, while ensuring that the movement trajectory of the two pressure plates is consistent and preventing deviation during the movement process.

[0027] First, rotate the threaded shaft 2. The rotational force drives the bearing seat 3 to translate along the X-axis. During the translation of the bearing seat 3, it drives the two connecting rods 4 close to the bearing seat 3 to rotate. The rotational force is transmitted through the two connecting rods 4 to drive the guide block 7, the first pressure plate 5 and the second pressure plate 8 to move relative to each other along the Y-axis. Finally, it drives the two ends of the first pressure plate 5 and the second pressure plate 8 to move synchronously. During the synchronous movement, it drives the guide block 7 and the two connecting rods 4 at the other end to move accordingly. Finally, the first pressure plate 5 and the second pressure plate 8 clamp and release the pipe clamp mounting seat 12.

[0028] Optionally, the linear module includes: a fixed base, a lead screw assembly 9, a servo motor 13, and a sliding seat; wherein, the fixed base is installed on one side of the clamp frame 1 and close to the connecting base 6, the lead screw assembly 9 is installed on the fixed base, the servo motor 13 is connected to the end of the lead screw assembly 9, and the sliding seat is installed on the lead screw assembly 9, and the sliding seat is connected to the positioning baffle 10. Thus, driven by the servo motor 13, the lead screw assembly 9 rotates, and the lead screw assembly 9 converts the power into a force that drives the sliding seat to move linearly, ultimately driving the positioning baffle 10 to move linearly along the X-axis.

[0029] Optionally, the linear module further includes: a mounting base, a slide rail, a cylinder, and a slider; wherein, the mounting base is installed on one side of the clamp frame 1 and close to the connecting base 6, the slide rail and the cylinder are both connected to the mounting base, the slider is slidably installed on the slide rail and connected to the power end of the cylinder; the slider is connected to the positioning baffle 10. Thus, under the drive of the cylinder, the slider and the positioning baffle 10 move along the X-axis.

[0030] Optionally, the positioning baffle 10 is equipped with a positioning groove that is compatible with the steel pipe 11, which can accommodate the steel pipe 11 and prevent displacement during the positioning process.

[0031] Optionally, a handle is connected to the end of the threaded shaft 2 away from the bearing seat 3, which facilitates operation by the operator.

[0032] Working principle: When using this clamp, place it on the first pipe clamp mounting seat 12 at the root of the boom. Rotate the threaded shaft 2 to move the second pressure plate 8 and the first pressure plate 5 inward synchronously to clamp the pipe clamp mounting seat 12. Start the servo motor 13, which drives the lead screw assembly 9 to rotate. The lead screw assembly 9 converts the power into a force that drives the sliding seat to move linearly, ultimately moving the positioning baffle 10 along the X-axis to the installation position of the steel pipe 11. After installing the steel pipe 11, rotate the threaded shaft 2 in the opposite direction to release the second pressure plate 8 and the first pressure plate 5 from their limiting position on the pipe clamp mounting seat 12. Then, remove the first pressure plate 5 and take out the clamp.

[0033] Place the clamp back on the second pipe clamp mounting base 12 of the boom, install the first pressure plate 5, and repeat the above method to complete the installation of the second steel pipe 11 of the boom. Example

[0034] This embodiment provides an excavator, wherein the boom root of the medium-sized excavator is assembled with steel pipes using the auxiliary positioning fixture described in Embodiment 1.

[0035] In summary, this utility model places a clamp frame at the base of the boom and uses the clamp frame to install and fix various components. The clamping assembly and the steel pipe positioning assembly clamp the pipe clamp mounting base and position the steel pipes on it, providing positioning support for the assembly of multiple steel pipes on the pipe clamp mounting base. This improves the efficiency of steel pipe assembly operations and reduces the labor intensity of workers. The linear module can drive the positioning baffle to adjust the position of the positioning support point according to various models and sizes of steel pipes, meeting the usage requirements of various machine types. The positioning baffle also prevents axial movement of the steel pipes on the pipe clamp mounting base during pre-tightening.

[0036] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. An auxiliary positioning fixture, characterized in that, include: A clamp frame mates with a boom root pipe clamp mounting base, and a guide assembly is provided on the clamp frame; The clamping assembly includes a threaded shaft mounted on a clamping frame, a bearing housing connected to the threaded shaft, a connecting seat connected to a guide assembly and axially corresponding to the bearing housing, four connecting rods mounted on both sides of the bearing housing and the connecting seat, and a first pressure plate and a second pressure plate respectively located near the ends of the four connecting rods and mounted on the guide assembly. The positioning assembly, mounted on one side of the fixture frame, includes a linear module mounted on the fixture frame away from the threaded shaft end and a positioning baffle mounted on the linear module.

2. The auxiliary positioning fixture according to claim 1, characterized in that, The guide assembly includes an internally threaded tube installed at one end of the clamp frame, a first guide post and a second guide post installed at both ends of the clamp frame, two guide beams symmetrically installed inside the clamp frame, and a first guide block and a second guide block respectively set on the two guide beams.

3. The auxiliary positioning fixture according to claim 2, characterized in that, The internally threaded tube is screwed to the threaded shaft; The first guide post is located below the threaded shaft and connected to the bearing housing; the second guide post is axially corresponding to the first guide post and connected to the connecting seat. The first guide block and the second guide block are respectively provided with connecting grooves that are adapted to the two ends of the first pressure plate, for detachable connection between the first pressure plate and the guide block; The bottom of the second pressure plate is provided with a sliding groove that is compatible with the guide beam; The four connecting rods are provided with pin holes at both ends for hinge connection with the bearing seat, connecting seat, first pressure plate and second pressure plate via pin shafts.

4. The auxiliary positioning fixture according to claim 1, characterized in that, The linear module includes a fixed base mounted on one side of the clamp frame and near the connecting seat end, a lead screw assembly mounted on the fixed base, a servo motor connected to the end of the lead screw assembly, a sliding seat mounted on the lead screw assembly, and a sliding seat connected to the sliding seat. The sliding seat is connected to the positioning baffle.

5. The auxiliary positioning fixture according to claim 1, characterized in that, The linear module includes a mounting base installed on one side of the clamp frame and near the connecting seat end, a slide rail connected to the mounting base, a cylinder connected to the mounting base, and a slider installed at the cylinder output end and slidably mounted on the slide rail. The slider is connected to the positioning baffle.

6. The auxiliary positioning fixture according to claim 1, characterized in that, The positioning baffle is equipped with a positioning groove that is compatible with the steel pipe.

7. The auxiliary positioning fixture according to claim 1, characterized in that, A handle is connected to the end of the threaded shaft away from the bearing housing.

8. An excavator, characterized in that, The excavator has an auxiliary positioning fixture as described in any one of claims 1 to 7 placed at the boom root, and the hydraulic steel pipe is assembled at the boom root through the auxiliary positioning fixture.

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