Positioning device of excavator walking frame

Abstract

The positioning device of the excavator walking frame comprises a machine body, a locking mechanism, an aligning mechanism and a driving mechanism, a workpiece table is arranged at the top end of the machine body, and the workpiece table moves up and down in the first direction; the locking mechanism comprises at least one pair of locking pieces, and the pair of locking pieces are oppositely arranged and move back and forth in the second direction so as to get close to or get away from each other and abut against the inner wall of the workpiece when getting away from each other. The alignment mechanism comprises a mounting seat and an alignment seat, and the alignment seat moves close to or away from the workpiece table in the second direction and abuts against the periphery of the workpiece when moving close to the workpiece table; the driving mechanism comprises a first driving piece, a second driving piece and a third driving piece; the first driving piece and the second driving piece are respectively used for driving the locking piece and the aligning seat to move back and forth along a second direction; the third driving part drives the workpiece table to move up and down in the first direction. Accurate positioning is achieved through the locking mechanism and the alignment mechanism, and production automation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of excavators, in particular to a positioning device for an excavator traveling frame. Background Art

[0002] In the current market, crawler hydraulic excavator traveling frames are usually hoisted to the chain plate production line by crane during the production process. Employees draw marking lines on the chain plate production line, and then operate the crane to visually align the traveling frame with the drawn marking lines and place it on the production line. This positioning method has the problems of inaccurate positioning, eccentricity, and non-perpendicularity between the workpiece and the production line, which does not meet the automation requirements of the chain plate line production line. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art described above, the utility model provides a positioning device for an excavator traveling frame, which realizes precise positioning through a locking mechanism and a pushing mechanism, thereby automating production.

[0004] The technical solution adopted by the present invention to solve the problem is:

[0005] A positioning device for an excavator traveling frame, comprising:

[0006] A machine body, wherein a workpiece platform is provided on the top of the machine body, the workpiece platform is spaced apart from the machine body and can move up and down along a first direction;

[0007] a locking mechanism comprising at least one pair of locking members, the pair of locking members being disposed opposite to each other and respectively moving back and forth along the second direction to move closer to or farther away from each other, and respectively abutting against an inner wall of the workpiece when moving away from each other;

[0008] a straightening mechanism, the straightening mechanism being spaced apart from the workpiece stage, the straightening mechanism comprising a mounting seat and a straightening seat, the straightening seat being mounted on the mounting seat and being movable back and forth along the second direction to move closer to or away from the workpiece stage, and abutting against the outer periphery of the workpiece when moving closer to the workpiece stage;

[0009] The driving mechanism includes a first driving member, a second driving member and a third driving member. The first driving member and the second driving member are respectively used to drive the locking member and the pushing seat to move back and forth along the second direction; the third driving member is used to drive the workpiece table to move up and down along the first direction.

[0010] Furthermore, the locking mechanism also includes a first lead screw, which extends along the second direction and is rotatably mounted on the workpiece table; the two sections of the first lead screw are provided with opposite threads, and respectively cooperate with a pair of locking member threads, and the first lead screw is used to drive a pair of locking members closer to or away from each other when rotating; the first driving member is connected to the first lead screw to drive the first lead screw to rotate.

[0011] Furthermore, two connecting nuts are provided at both ends of the first lead screw, and the two connecting nuts respectively cooperate with the two sections of the thread of the first lead screw, and are used to move back and forth along the axial direction of the first lead screw when the first lead screw rotates, so as to approach or move away from each other; the two connecting nuts are respectively connected to a pair of the locking members, and the locking members are locking rods.

[0012] Furthermore, the locking mechanism also includes two connecting plates, which are arranged opposite to each other and are respectively connected to two connecting nuts, and are used to move together with the two connecting nuts when they move back and forth along the axial direction of the first screw to move closer to or away from each other; the locking rods are provided with at least two pairs, and at least two pairs of the locking rods are arranged in pairs and are evenly spaced on the two connecting plates.

[0013] Furthermore, first slide rails are provided on both sides of the workpiece table, and the first slide rails extend along the second direction; first sliders are respectively provided at both ends of the connecting plate, and the first sliders are used to slide with the first slide rails when the connecting plate moves along the axial direction of the screw.

[0014] Furthermore, it also includes a mounting plate, which is mounted on the top of the workpiece table. The mounting plate is provided with at least four through-groove sections, and at least two pairs of locking rods are respectively provided in the at least four through-groove sections and slide therein.

[0015] Furthermore, a second lead screw is provided on the mounting seat, and the second lead screw is rotatably mounted on the mounting seat and extends along the second direction; a connecting piece is provided at the bottom end of the pushing seat, and the connecting piece is threadedly engaged with the second lead screw and is used to move back and forth along the axial direction of the second lead screw when the second lead screw rotates, so that the pushing seat moves closer to or away from the workpiece table along the second direction; the second driving member is connected to the second lead screw to drive the second lead screw to rotate.

[0016] Furthermore, second slide rails are respectively provided on both sides of the mounting seat, and the two second slide rails extend respectively along the second direction. A second slider is provided at the bottom end of the pushing seat, and the second slider is used to slide with the second slide rail when the connecting member moves back and forth along the axial direction of the second screw.

[0017] Furthermore, it also includes a lifting plate, and the workpiece table is installed on the top end of the lifting plate; the lifting plate is rotatably connected to the machine body through multiple rotating shafts, and the multiple rotating shafts are rotatably arranged in the machine body and are used to drive the lifting plate to move up and down along the first direction when rotating, so that the lifting plate moves up and down along the first direction; the third driving member is connected to the multiple rotating shafts through the transmission shaft to drive the multiple rotating shafts to rotate.

[0018] Furthermore, it also includes a tensioning mechanism, which includes a tensioning seat. The tensioning seat is arranged between the lifting plate and the workpiece table and is used to drive the workpiece table to swing when subjected to force.

[0019] To sum up, the positioning device of the excavator walking frame provided by the utility model has the following technical effects: when in use, the center of the workpiece is placed on the workpiece table and is sleeved on the outer periphery of the two locking members, and then the two locking members are driven away from each other by the first driving member until they are respectively against the inner walls of the workpiece to lock the center point of the workpiece. Thereafter, the second driving member is started to drive the pushing seat to move close to the outer periphery of the workpiece until it is against the outer peripheral edge of the workpiece to push the workpiece straight. In this way, the workpiece can be automatically positioned, and the positioning is more accurate compared to manual positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a schematic diagram of another perspective of the structure of the utility model;

[0022] Figure 3 This is an exploded schematic diagram of the machine body in the present utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the push-correction mechanism in the present utility model;

[0024] Figure 5 It is a structural diagram of the machine body in the utility model;

[0025] The meanings of the reference numerals are as follows:

[0026] 10. Machine body; 11. Workpiece table; 12. Lifting plate; 13. Mounting plate; 131. Connecting groove section; 14. Rotating shaft; 15. Connecting shaft; 16. Spring; 20. Locking mechanism; 21. Locking rod; 22. First lead screw; 221. Connecting nut; 23. Connecting plate; 24. First slide rail; 25. First slider; 30. Aligning mechanism; 31. Aligning seat; 32. Mounting seat; 33. Second lead screw; 34. Connecting member; 35. Second slider; 36. Second slide rail; 40. First driving member; 41. Second driving member; 42. Third driving member; 421. Transmission shaft; 50. Tensioning seat; 51. Limiting groove. DETAILED DESCRIPTION

[0027] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] See Figures 1 to 4The utility model discloses a positioning device for an excavator walking frame, including a machine body 10, a locking mechanism 20, a pushing mechanism 30 and a driving mechanism. A workpiece table 11 is provided at the top of the machine body 10. The workpiece table 11 is spaced apart from the machine body 10 and can move up and down along a first direction. The locking mechanism 20 includes at least one pair of locking members, which are relatively arranged and can respectively move back and forth along a second direction to approach or move away from each other, and respectively abut against the inner wall of the workpiece when moving away from each other. The pushing mechanism 30 is spaced apart from the workpiece table 11. The structure 30 includes a mounting seat 32 and a straightening seat 31. The straightening seat 31 is installed on the mounting seat 32 and can move back and forth along the second direction to move closer to or away from the workpiece table 11, and abut against the outer periphery of the workpiece when moving closer to the workpiece table 11. The driving mechanism includes a first driving member 40, a second driving member 41 and a third driving member 42. The first driving member 40 and the second driving member 41 are respectively used to drive the locking member and the straightening seat 31 to move back and forth along the second direction, and the third driving member 42 is used to drive the workpiece table 11 to move up and down along the first direction.

[0031] On the basis of the above structure, the first direction is the height direction of the workpiece table 11, and the second direction is the left and right direction of the workpiece table 11. In the initial state, the workpiece table 11 is at the highest position, and a pair of locking members are close to each other and at the center of the workpiece table 11. Then the workpiece is placed on the workpiece table 11, and the inner ring of the workpiece is sleeved on the outer periphery of the pair of locking members. At this time, the first driving member 40 is started to drive the pair of locking members away from each other in the second direction until the two locking members respectively abut against the inner ring edge of the workpiece. Since the pair of locking members move in opposite directions during the mutual movement, the locking members that move in opposite directions abut against the inner ring end wall of the workpiece, and the forces they each exert form a force balance state on the workpiece. This balance state helps to resist external interference and maintain the stable position of the workpiece, so that the inner ring (that is, the center of gravity) of the workpiece is locked;

[0032] When the inner ring of the workpiece is locked by the locking member, the friction between the locking member and the inner ring of the workpiece prevents the workpiece from moving in the horizontal direction. Thereafter, when the second driving member 41 is turned on to drive the pushing seat 31 to move along the second direction close to the workpiece table 11 until the pushing seat 31 abuts against the circumference of the workpiece, an external force is applied to the workpiece. This external force needs to overcome the possible slight deviation or tilt of the workpiece and guide the workpiece to move to the correct position to achieve the alignment of the workpiece, so that the workpiece is aligned in the vertical direction of transmission and is convenient for conveying to the next workstation.

[0033] Then, the third driving member 42 is started to drive the workpiece table 11 to descend in the first direction until the workpiece is placed on the workpiece conveyor belt. At this time, the first driving member 40 and the second driving member 41 are started again, driving a pair of locking members to approach each other to loosen the inner ring of the workpiece. At the same time, the pushing seat 31 also moves away from the workpiece table 11 to the edge of the loosened workpiece table 11, and the workpiece conveyor belt is started to transfer the workpiece to the next workstation, and then the operation cycle of the next wheel is started.

[0034] Therefore, when using the positioning device of the excavator traveling frame in this embodiment, the workpiece can be accurately positioned through the locking mechanism 20 and the pushing mechanism 30, realizing automatic positioning, which is more accurate than manual positioning.

[0035] It should be noted that the workpiece conveyor belts can be placed on both sides of the machine base, and the conveyor belt on one side is located in the gap between the pushing mechanism 30 and the machine body 10, so that after the workpiece table 11 descends, the workpiece table 11 can fall onto the conveyor belt and be transported to the next workstation.

[0036] In addition, the straightening seat 31 and the locking member in this embodiment can adopt a plate-shaped, block-shaped or rod-shaped structure, and the first driving member 40 and the second driving member 41 can respectively adopt a hydraulic driving member, a driving cylinder or a driving motor, etc.; during assembly, the driving rods or driving shafts of the first driving member 40 and the second driving member 41 are respectively connected to the locking member and the straightening seat 31, or are connected through the transmission shaft 421 to drive the straightening seat 31 and the locking member to move linearly.

[0037] Similarly, the third driving member 42 can also be a hydraulic driving member, a driving cylinder or a driving motor. During assembly, the workpiece table 11 is rotatably connected to the body 10 through a rotating shaft, and the power output end of the third driving member 42 is connected to the rotating shaft to drive the rotating shaft to rotate, and the workpiece table 11 is driven to move up and down along the first direction through the rotation of the rotating shaft; of course, a nut can also be provided at the bottom of the workpiece table 11, and a lead screw can be provided on the body 10, and the lead screw can be provided along the first direction and matched with the nut thread, and the third driving member 42 can be connected to the lead screw to drive the lead screw to rotate through the third driving member 42, and drive the nut to move up and down along the axial direction of the lead screw (that is, the first direction).

[0038] Furthermore, the locking mechanism 20 also includes a first screw 22, which extends along the second direction and is rotatably installed on the workpiece table 11. The two sections of the first screw 22 are provided with opposite threads and respectively cooperate with a pair of locking member threads. When the first screw 22 rotates, it drives the pair of locking members to approach or move away from each other, wherein the first driving member 40 is connected to the first screw 22 to drive the first screw 22 to rotate.

[0039] On the basis of this structure, during assembly, a pair of locking members are respectively connected to the two sections of the thread of the first screw 22. Since the threads of the two sections of the first screw 22 are opposite, that is, two sections of threads with different rotation directions are made on the first screw 22, one section is a right-handed thread and the other section is a left-handed thread. This design enables the first screw 22 to simultaneously drive a pair of locking members to move in opposite directions when rotating, so that the pair of locking members move closer to or away from each other to lock or loosen the inner ring of the workpiece.

[0040] It should be noted that the first screw 22 can use an existing bidirectional screw, and a pair of locking parts can be respectively connected to the two sections of the first screw 22 through two nuts with different rotation directions; of course, it is also possible to directly set threads of different rotation directions on a pair of locking parts so that they are directly threadedly connected to the two sections of the first screw 22.

[0041] Preferably, in this embodiment, two connecting nuts 221 are provided at both ends of the first screw 22, and the two connecting nuts 221 are respectively matched with the two sections of the thread of the first screw 22, and are respectively connected to a pair of locking members through the two connecting nuts 221. In this way, when the first screw 22 rotates, the two connecting nuts 221 can move back and forth in the opposite direction of the axial direction of the first screw 22 to drive the pair of locking members closer to or away from each other.

[0042] It should be noted that the locking member in this embodiment is a locking rod 21. Compared with a block structure, a rod structure can more effectively concentrate and transmit force, thereby ensuring the stability and reliability of the locking effect.

[0043] In addition, in order to prevent the locking rod 21 from damaging the workpiece's paint surface when in contact with the workpiece, the contact position between the locking rod 21 and the workpiece is made of soft materials such as polyurethane or engineering rubber to prevent damage to the workpiece's paint surface.

[0044] Furthermore, the locking mechanism 20 also includes two connecting plates 23, which are arranged opposite to each other and are respectively connected to the two connecting nuts 221, and move together with the two connecting nuts 221 when moving back and forth along the axial direction of the first screw 22 to approach or move away from each other. There are at least two pairs of locking rods 21, and at least two pairs of locking rods 21 are arranged in pairs and are evenly spaced on the two connecting plates 23.

[0045] On the basis of this structure, when there are at least two pairs of locking rods 21, during assembly, two connecting plates 23 are connected to the two connecting nuts 221 respectively, and the connection area of ​​the two connecting nuts 221 is increased by the connecting plates 23, so that at least two pairs of locking rods 21 can be installed in pairs on the two connecting plates 23, and are arranged on the two connecting plates 23 opposite to each other and evenly spaced, so that multiple pairs of locking rods 21 can be driven to move closer to or away from each other at the same time through the two connecting nuts 221.

[0046] Specifically, the locking rod 21 can be installed in the size of three pairs, four pairs or more of the inner ring of the workpiece, and the locking rod 21 can be fixed to the connecting plate 23 by welding, gluing or through connecting parts 34 (such as bolts or nuts, etc.).

[0047] In addition, a first slide rail 24 is provided on both sides of the workpiece table 11, and the first slide rail 24 is extended along the second direction, and a first slider 25 is provided at both ends of the connecting plate 23. Specifically, the first slider 25 can be set at the bottom end of the connecting plate 23 and slideably cooperate with the first slide rails 24 on both sides of the workpiece table 11. In this way, when the connecting plate 23 moves along the axial direction of the first screw 22, due to the sliding cooperation between the first slider 25 and the first slide rail 24, the connecting plate 23 moves back and forth along the second direction more smoothly.

[0048] Furthermore, it also includes a mounting plate 13, which is installed on the top of the workpiece table 11, and is provided with at least four through-grooves 131, and at least two pairs of locking rods 21 are respectively provided in the at least four through-grooves 131 and slide therein.

[0049] Specifically, during assembly, multiple plate segments can be used to semi-enclose the workpiece table 11, or a groove or cavity can be directly formed on the workpiece table 11, and the locking mechanism 20 and the first slide rail 24 can be installed in the groove. Then, the mounting plate 13 is connected to the top of the workpiece table 11 to cover the groove on the workpiece table 11 to prevent external dust or impurities from falling into the workpiece table 11, causing the first slide rail 24 and the first slider 25 to get stuck, or affecting the rotation coordination between the connecting nut 221 and the first screw 22, thereby indirectly improving the service life of the structure.

[0050] In addition, by providing at least four through-grooves 131 on the mounting plate 13, at least two pairs of locking rods 21 are correspondingly connected to the at least four through-grooves 131 during assembly. In this way, even if the mounting plate 13 covers the top of the workpiece table 11, it does not affect the normal sliding of multiple pairs of locking rods 21.

[0051] Furthermore, a second lead screw 33 is provided on the mounting seat 32, and the second lead screw 33 is rotatably mounted on the mounting seat 32 and extends along the second direction. A connecting member 34 is provided at the bottom end of the pushing seat 31, and the connecting member 34 is threadedly engaged with the second lead screw 33, and moves back and forth along the axial direction of the second lead screw 33 when the second lead screw 33 rotates, so that the pushing seat 31 moves closer to or away from the workpiece table 11 along the second direction. The second driving member 41 is connected to the second lead screw 33 to drive the second lead screw 33 to rotate.

[0052] Specifically, during assembly, the second screw 33 is connected to the second drive and installed on the mounting seat 32 to drive the second screw 33 to rotate through the second drive member 41. Since the pushing seat 31 is threadedly engaged with the second screw 33 through the connecting member 34, the second screw 33 can drive the connecting member 34 to move back and forth along the axial direction of the second screw 33 (that is, the second direction) to move closer to or away from the workpiece table 11, so that the pushing seat 31 connected to the connecting member 34 also moves closer to or away from the workpiece table 11.

[0053] It should be noted that the connecting member 34 can be a nut that matches the thread on the second screw 33 so that the two threads are mated.

[0054] Preferably, a second slide rail 36 is provided on both sides of the mounting seat 32, and the two second slide rails 36 extend along the second direction respectively, and a second slider 35 is provided at the bottom end of the pushing seat 31, and the second slider 35 is slidably connected with the second slide rail 36. In this way, when the pushing seat 31 moves axially along the second screw 33, the second slider 35 slides with the second slide rail 36, so that the pushing seat 31 moves back and forth along the second direction more smoothly.

[0055] Furthermore, it also includes a lifting plate 12, and the workpiece table 11 is installed on the top of the lifting plate 12. The lifting plate 12 is rotatably connected to the body 10 through multiple rotating shafts 14. The multiple rotating shafts 14 are rotatably arranged in the body 10 and drive the lifting plate 12 to move up and down along the first direction when rotating, so that the lifting plate 12 moves up and down along the first direction. The third driving member 42 is connected to the multiple rotating shafts 14 through the transmission shaft 421 to drive the multiple rotating shafts 14 to rotate.

[0056] Specifically, the lifting plate 12 is respectively inserted into the machine body 10 through multiple rotating shafts 14, and the third driving member 42 is simultaneously connected to the multiple rotating shafts 14 through the transmission shaft 421, so that the multiple rotating shafts 14 are driven to rotate at the same time by the third driving member 42, so that the lifting plate 12 moves up and down along the first direction during the rotation of the multiple rotating shafts 14, thereby driving the workpiece table 11 to move up and down along the first direction.

[0057] It should be noted that the plurality of rotating shafts 14 may be threaded rods. During assembly, the lifting plate 12 is threadably engaged with the threaded rods via nuts to drive the lifting plate 12 to move up and down along the first direction.

[0058] Furthermore, a tensioning mechanism is also included. Specifically, the tensioning mechanism includes a tensioning seat 50. The tensioning seat 50 is arranged between the lifting plate 12 and the workpiece table 11, and drives the workpiece table 11 to swing when subjected to force.

[0059] Specifically, during assembly, the tensioning seat 50 can be connected to the workpiece table 11 or the lifting plate 12 through a flexible connector (such as a connector made of flexible materials such as a rubber pad, a spring pad, etc.). Since these materials can absorb collision energy, when the pushing seat 31 approaches the workpiece table 11 and moves to push the workpiece, the workpiece table 11 can swing slightly when it is impacted, thereby increasing the flexibility of the workpiece table 11, reducing rigid collisions, and avoiding damage to the surface of the workpiece due to rigid collisions during the process of being pushed by the pushing mechanism 30; in addition, during the process of the pushing seat 31 pushing the workpiece, if the workpiece has not been completely straightened, the workpiece table 11 can swing slightly after being impacted, so that it reaches the straightened position after the slight swing, so as to assist in straightening the workpiece and indirectly improve the straightening accuracy.

[0060] Of course, you can also Figure 5 As shown in the figure, the tensioning seat 50 is rotatably connected between the workpiece table 11 and the lifting plate 12, and then a limit groove 51 is set on both sides of the tensioning seat 50, and the limit groove 51 is extended along the second direction. Then a connecting shaft 15 is set on the lifting plate 12, and the connecting shaft 15 is extended in a direction perpendicular to the second direction and passed through the limit groove 51, and the two ends of the connecting shaft 15 are connected to the lifting plate 12 through a spring 16. In this way, when the pushing seat 31 moves along the second direction toward the workpiece table 11 to push the workpiece, since the limit groove 51 extends along the second direction, the space for the connecting shaft 15 to swing back and forth in the second direction is limited, so that the workpiece table 11 can swing slightly after being subjected to force, thereby increasing the flexibility of the workpiece table 11, reducing rigid collisions, and assisting the workpiece in straightening through the swing of the workpiece table 11 to improve the straightening accuracy.

[0061] The technical means disclosed in the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A positioning device for an excavator traveling frame, characterized in that: include: A machine body (10), wherein a workpiece platform (11) is provided at the top of the machine body (10), the workpiece platform (11) is spaced apart from the machine body (10) and can move up and down along a first direction; A locking mechanism (20), the locking mechanism (20) comprising at least one pair of locking members, the pair of locking members being arranged relative to each other and respectively moving back and forth along the second direction to move closer to or away from each other, and respectively abutting against the inner wall of the workpiece when moving away from each other; A straightening mechanism (30), the straightening mechanism (30) is spaced apart from the workpiece platform (11), the straightening mechanism (30) comprises a mounting seat (32) and a straightening seat (31), the straightening seat (31) is mounted on the mounting seat (32), and can move back and forth along the second direction to move closer to or away from the workpiece platform (11), and abuts against the outer periphery of the workpiece when moving closer to the workpiece platform (11); A driving mechanism, the driving mechanism includes a first driving member (40), a second driving member (41) and a third driving member (42), the first driving member (40) and the second driving member (41) are respectively used to drive the locking member and the pushing seat (31) to move back and forth along the second direction; the third driving member (42) is used to drive the workpiece platform (11) to move up and down along the first direction.

2. The positioning device for the excavator traveling frame according to claim 1, characterized in that: The locking mechanism (20) also includes a first screw (22), which extends along the second direction and is rotatably mounted on the workpiece table (11); two sections of the first screw (22) are provided with opposite threads, and respectively cooperate with a pair of locking member threads, and the first screw (22) is used to drive the pair of locking members to move closer to or away from each other when rotating; the first driving member (40) is connected to the first screw (22) to drive the first screw (22) to rotate.

3. The positioning device for the excavator traveling frame according to claim 2, characterized in that: Two connecting nuts (221) are provided at both ends of the first lead screw (22), and the two connecting nuts (221) respectively cooperate with the two sections of the thread of the first lead screw (22) and are used to move back and forth along the axial direction of the first lead screw (22) when the first lead screw (22) rotates, so as to move closer to or away from each other; the two connecting nuts (221) are respectively connected to a pair of locking members, and the locking members are locking rods (21).

4. The positioning device for the excavator traveling frame according to claim 3, characterized in that: The locking mechanism (20) further comprises two connecting plates (23), the two connecting plates (23) being arranged opposite to each other and respectively connected to the two connecting nuts (221), and being used to move together with the two connecting nuts (221) when moving back and forth along the axial direction of the first screw (22) so as to move closer to or away from each other; the locking rods (21) are provided with at least two pairs, and the at least two pairs of locking rods (21) are arranged in pairs and are respectively evenly spaced and distributed on the two connecting plates (23).

5. The positioning device for the excavator traveling frame according to claim 4, characterized in that: The workpiece platform (11) is further provided with first slide rails (24) on both sides, and the first slide rails (24) are extended along the second direction; the two ends of the connecting plate (23) are respectively provided with first sliders (25), and the first sliders (25) are used to slide with the first slide rails (24) when the connecting plate (23) moves along the axial direction of the screw.

6. The positioning device for the excavator traveling frame according to claim 5, characterized in that: The invention also includes a mounting plate (13), wherein the mounting plate (13) is mounted on the top of the workpiece platform (11), and the mounting plate (13) is provided with at least four through-connecting groove sections (131). At least two pairs of locking rods (21) are respectively provided in the at least four through-connecting groove sections (131) and slide therein.

7. The positioning device for an excavator traveling frame according to claim 1, wherein: A second lead screw (33) is provided on the mounting seat (32), and the second lead screw (33) is rotatably mounted on the mounting seat (32) and extends along the second direction; a connecting piece (34) is provided at the bottom end of the pushing seat (31), and the connecting piece (34) is threadedly engaged with the second lead screw (33) and is used to move back and forth along the axial direction of the second lead screw (33) when the second lead screw (33) rotates, so that the pushing seat (31) moves closer to or away from the workpiece table (11) along the second direction; the second driving piece (41) is connected to the second lead screw (33) to drive the second lead screw (33) to rotate.

8. The positioning device for the excavator traveling frame according to claim 7, characterized in that: A second slide rail (36) is provided on both sides of the mounting seat (32), and the two second slide rails (36) extend respectively along the second direction. A second slider (35) is provided at the bottom end of the pushing seat (31), and the second slider (35) is used to slide and cooperate with the second slide rail (36) when the connecting member (34) moves back and forth along the axial direction of the second screw (33).

9. The positioning device for an excavator traveling frame according to claim 1, wherein: The invention also includes a lifting plate (12), and the workpiece platform (11) is installed on the top end of the lifting plate (12); the lifting plate (12) is rotatably connected to the machine body (10) through a plurality of rotating shafts (14), and the plurality of rotating shafts (14) are rotatably arranged in the machine body (10) and are used to drive the lifting plate (12) to move up and down along the first direction when rotating, so that the lifting plate (12) moves up and down along the first direction; the third driving member (42) is connected to the plurality of rotating shafts (14) through a transmission shaft (421) to drive the plurality of rotating shafts (14) to rotate.

10. The positioning device for the excavator traveling frame according to claim 9, characterized in that: It also includes a tensioning mechanism, which includes a tensioning seat (50). The tensioning seat (50) is arranged between the lifting plate (12) and the workpiece platform (11) and is used to drive the workpiece platform (11) to swing when subjected to force.

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