Piston rod preassembling device for assembling oil cylinder

Abstract

The utility model relates to the technical field of jack oil cylinder assembly, in particular to a piston rod preassembling device for oil cylinder assembly. The piston rod preassembling device comprises a supporting mechanism, a conveying mechanism, a feeding mechanism, a pushing mechanism and a centering clamping mechanism. The conveying mechanism is located under the supporting mechanism, and the conveying mechanism is used for conveying the piston rod in the first direction and can selectively pause the piston rod to the first station and the second station in sequence. The feeding mechanism is arranged on one side of the conveying mechanism and used for pre-installing a guide sleeve on the piston rod of the first station and pre-installing a piston on the piston rod of the second station. The pushing mechanism is used for pushing the guide sleeve preassembled on the piston rod located on the first station to a designated position, and the centering clamping mechanism is used for clamping the piston rod located on the second station. All the mechanisms can work cooperatively, only one independent station is needed for completing operation, and the assembling efficiency and the assembling precision are remarkably improved. The pushing mechanism and the centering clamping mechanism can be used for assembling piston rods of different models.

Description

TECHNICAL FIELD

[0001] The utility model relates to jack oil cylinder assembly technical field especially relates to a piston rod preloading device for oil cylinder assembly. BACKGROUND

[0002] The jack oil cylinder is the core component of the coal mine hydraulic support, and the assembly of the jack oil cylinder includes workpiece cleaning, piston rod preloading, piston assembly, piston rod cylinder body assembly, and testing. Among them, the guide sleeve and the piston preloading are the key steps in the process of assembling the piston rod assembly, and the preloading quality directly affects the accuracy of the subsequent piston tightening and punching, and further affects the performance and reliability of the jack oil cylinder.

[0003] The traditional method of guide sleeve and piston preloading usually adopts manual assembly, which is difficult to meet the mass production demand, and is affected by the skill and state of workers, resulting in unstable assembly quality. At present, there are also automatic equipment for oil cylinder piston rod preloading, but usually multiple independent stations are needed to complete these operations, resulting in low production efficiency and difficult to guarantee the assembly accuracy. In addition, the size requirements of the guide sleeve and the piston are high, which cannot adapt to different sizes of the guide sleeve and the piston. SUMMARY

[0004] (I) Technical problem to be solved

[0005] In view of the above shortcomings and deficiencies of the prior art, the utility model provides a piston rod preloading device for oil cylinder assembly, which solves the technical problems of low production efficiency and unstable assembly accuracy of the piston rod preloading.

[0006] (II) Technical scheme

[0007] In order to achieve the above purpose, the main technical scheme adopted by the utility model includes:

[0008] The utility model embodiment provides a piston rod preloading device for oil cylinder assembly, which comprises a supporting mechanism, a conveying mechanism, a feeding mechanism, a pushing mechanism and a centering and clamping mechanism. The conveying mechanism is located directly below the supporting mechanism, and is used for conveying the piston rod along the first direction and can selectively pause the piston rod to the first station and the second station in turn. The feeding mechanism is arranged on one side of the conveying mechanism, and is used for preloading the guide sleeve on the piston rod located in the first station and preloading the piston on the piston rod located in the second station. The top of the supporting mechanism is sequentially and spacedly provided with the first sliding guide rail and the second sliding guide rail extending along the second direction. The pushing mechanism and the centering and clamping mechanism are movably arranged on the first sliding guide rail and the second sliding guide rail respectively. The pushing mechanism is used for pushing the guide sleeve preloaded on the piston rod located in the first station to the specified position. The centering and clamping mechanism is used for clamping the piston rod located in the second station. The first direction and the second direction are perpendicular.

[0009] Preferably, the pushing mechanism comprises a pushing assembly; the pushing assembly comprises a first sliding plate, a first pushing plate and a first connecting plate, the first sliding plate is movably arranged on the first sliding rail in the second direction, the first pushing plate is vertically arranged, the first pushing plate is fixedly connected with the first sliding plate through the first connecting plate, an arc-shaped hole is arranged at the bottom of the first pushing plate, the arc-shaped hole is used for allowing the piston rod to pass through, and the area of the first pushing plate around the arc-shaped hole is used for pushing the guide sleeve.

[0010] Preferably, the pushing mechanism further comprises a first lifting assembly; the first lifting assembly comprises a first lifting rail, a first lifting driving motor and a second pushing plate, a through hole is arranged at the top of the first sliding plate, the first lifting rail is slidably connected with the through hole, the bottom end of the first lifting rail is connected with the top end of the second pushing plate, the bottom end of the second pushing plate can abut against the guide sleeve, and the side surface of the second pushing plate can abut against the stepped surface of the guide sleeve, the driving end of the first lifting driving motor is connected with the top end of the first lifting rail, and the first lifting driving motor can drive the first lifting rail to lift relative to the first sliding plate, so as to drive the second pushing plate to lift and push the guide sleeve.

[0011] Preferably, the centering and clamping mechanism comprises a moving assembly and a clamping assembly; the moving assembly comprises a second sliding plate and a connecting seat, the second sliding plate is movably arranged on the second sliding rail in the second direction, and the connecting seat is fixedly connected with the second sliding plate; the clamping assembly is arranged on the side of the connecting seat close to the feeding mechanism, the clamping assembly comprises two clamping blocks, the second sliding plate can drive the clamping assembly to move to the end of the piston rod away from the feeding mechanism through the connecting seat, and the two clamping blocks can move towards or away from each other to clamp or release the piston rod.

[0012] Preferably, the centering and clamping mechanism further comprises a second lifting assembly; the second lifting assembly comprises a lifting sliding block and a second lifting driving motor, the lifting sliding block is slidably arranged on the side of the connecting seat close to the feeding mechanism, the clamping assembly is connected with the lifting sliding block, and the second lifting driving motor is arranged at the top of the lifting sliding block.

[0013] Preferably, the feeding mechanism comprises a feeding robot, a guide sleeve docking position, a piston docking position and a buffer table; the feeding robot is arranged on one side of the conveying mechanism, and the guide sleeve docking position, the piston docking position and the buffer table are sequentially arranged around the feeding robot.

[0014] Preferably, the conveying mechanism comprises a conveying chain and a plurality of piston rod supporting units; the conveying chain is located directly below the supporting mechanism, and the plurality of piston rod supporting units are arranged on the conveying chain at intervals and used for placing the piston rods.

[0015] Preferably, the supporting mechanism comprises a vertical supporting unit and a horizontal supporting unit connected with each other.

[0016] The vertical supporting unit comprises four supporting columns; the horizontal supporting unit comprises a first supporting beam, a second supporting beam, a third supporting beam and a fourth supporting beam, the first supporting beam, the second supporting beam and the third supporting beam are sequentially connected in a head-to-tail mode to form a U-shaped horizontal frame, and the fourth supporting beam is connected with the side ends of the first supporting beam and the third supporting beam; and the top portions of the four supporting columns are respectively connected with the bottoms of the two ends of the first supporting beam and the third supporting beam.

[0017] Preferably, the device further comprises a rear pushing mechanism; the rear pushing mechanism is located directly below the pushing mechanism, the bottom of the horizontal supporting unit is provided with a third sliding guide rail, and the rear pushing mechanism is movably arranged on the third sliding guide rail; the rear pushing mechanism is used for pushing the end of the piston rod, which is located at the first station and is away from the feeding mechanism.

[0018] Preferably, the device further comprises a pressing mechanism; the pressing mechanism is connected with the fourth supporting beam, and the pressing mechanism can be raised or lowered to loosen or press the piston rod.

[0019] (Three) beneficial effects

[0020] The device has the following beneficial effects:

[0021] The device comprises a supporting mechanism, a conveying mechanism, a feeding mechanism, a pushing mechanism and a centering and clamping mechanism, and each mechanism can work cooperatively, thereby significantly improving the assembly efficiency and assembly precision. The pushing mechanism and the centering and clamping mechanism are movably arranged on the first sliding guide rail and the second sliding guide rail respectively, and can be used for assembling piston rods of different models.

[0022] The conveying mechanism is located directly below the supporting mechanism and is arranged along the first direction, can stably convey the piston rod, reduces manual intervention, and, in combination with the clamping function of the centering and clamping mechanism, ensures the accurate positioning of the piston rod in the process of assembling the piston, and avoids deviation. The feeding mechanism can quickly and accurately pre-assemble the guide sleeve and the piston on the piston rod in sequence, thereby reducing the manual operation time. The pushing mechanism can push the pre-assembled guide sleeve to a specified position, thereby improving the assembly precision of the guide sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structural schematic view of a piston rod pre-assembly device for oil cylinder assembly according to the device;

[0024] Figure 2 FIG. 4 is a structural schematic view of a conveying mechanism;

[0025] Figure 3 FIG. 6 is a structural schematic view of a feeding robot;

[0026] Figure 4 FIG. 8 is a structural schematic view of a supporting mechanism;

[0027] Figure 5 Side view of the support mechanism;

[0028] Figure 6 Top view of the support mechanism.

[0029] [BRIEF DESCRIPTION OF DRAWINGS]

[0030] 1: support mechanism; 11: vertical support unit; 111: support column; 12: horizontal support unit; 121: first support beam; 122: second support beam; 123: third support beam; 124: fourth support beam; 125: connecting beam; 13: first sliding guide rail; 14: second sliding guide rail;

[0031] 2: conveying mechanism; 21: conveying chain; 22: conveying drive motor; 23: piston rod support unit; 231: V-shaped piston rod support frame; 24: in-place detection sensor;

[0032] 3: feeding mechanism; 31: feeding robot; 311: gripping clamp; 312: laser sensor; 32: guide sleeve interface position; 33: piston interface position; 34: buffer table;

[0033] 4: pushing mechanism; 41: pushing assembly; 411: first sliding plate; 412: first pushing plate; 4121: arc-shaped hole; 413: first connecting plate; 414: first drive electric cylinder; 42: first lifting assembly; 421: first lifting guide rail; 422: first lifting drive motor; 423: second pushing plate;

[0034] 5: centering and clamping mechanism; 51: moving assembly; 511: second sliding plate; 512: connecting seat; 513: second drive electric cylinder; 52: clamping assembly; 521: clamping block; 53: second lifting assembly; 531: lifting sliding block; 532: second lifting drive motor;

[0035] 6: rear jacking mechanism; 61: third sliding plate; 62: second connecting plate; 63: rear jacking plate; 64: third drive electric cylinder;

[0036] 7: pressing-down mechanism; 71: pressing-down rod; 72: support piece; 73: third lifting drive motor; 74: third lifting guide rail;

[0037] a: first direction; b: second direction. DETAILED DESCRIPTION

[0038] In order to better explain the present application, so as to facilitate understanding, the following will be combined with the drawings, through specific embodiments, the present application is described in detail.

[0039] EMBODIMENT

[0040] As Figure 1As shown, the embodiment provides a piston rod pre-assembly device for oil cylinder assembly, which comprises a support mechanism 1, a conveying mechanism 2, a feeding mechanism 3, a pushing mechanism 4 and a centering and clamping mechanism 5, and each mechanism can work cooperatively to significantly improve the assembly efficiency and accuracy of the piston rod.

[0041] As shown in Figure 4 and Figure 6 , the support mechanism 1 comprises a vertical support unit 11 and a horizontal support unit 12 connected together. The vertical support unit 11 comprises four support columns 111, and the horizontal support unit 12 comprises a first support beam 121, a second support beam 122, a third support beam 123 and a fourth support beam 124. The first support beam 121, the second support beam 122 and the third support beam 123 are sequentially connected end to end to form a U-shaped horizontal frame, and the fourth support beam 124 is connected to the side ends of the first support beam 121 and the third support beam 123. The top of the four support columns 111 is respectively connected to the bottom of the two ends of the first support beam 121 and the third support beam 123. The horizontal support unit 12 further comprises a plurality of parallel connection beams 125, and each connection beam 125 is connected to the second support beam 122 and the fourth support beam 124 at both ends.

[0042] As shown in Figure 1 , the conveying mechanism 2 is located directly below the support mechanism 1, and the conveying mechanism 2 is used for conveying the piston rod in the first direction a and can selectively pause the piston rod to the first station and the second station in sequence. The conveying mechanism 2 can stably transport the piston rod, reduce manual intervention, and ensure the accurate positioning of the piston rod in the process of assembling the piston by combining the clamping function of the centering and clamping mechanism 5, thereby avoiding deviation.

[0043] In order to ensure that the piston rod remains stable during conveying and ensure the continuity of the conveying process, as shown in Figure 2 , the conveying mechanism 2 comprises a conveying chain 21, a conveying drive motor 22 and a plurality of piston rod support units 23. The conveying chain 21 is located directly below the support mechanism 1, the plurality of piston rod support units 23 are arranged on the conveying chain 21 at intervals and are used for placing the piston rod, and the conveying drive motor 22 drives the conveying chain 21 to convey the piston rod.

[0044] Specifically, as shown in Figure 2 , the piston rod support unit 23 comprises a plurality of V-shaped piston rod support frames 231 arranged at intervals, and the plurality of V-shaped piston rod support frames 231 can avoid deviation or sliding of the piston rod, thereby improving the safety of the conveying process.

[0045] As a preferred embodiment of the utility model, the number of V-shaped piston rod support frames 231 of each piston rod support unit 23 is 3.

[0046] As shown in Figure 2As shown, the conveying mechanism 2 further comprises an in-position detection sensor 24 arranged at one end of the conveying chain 21 close to the centering clamping mechanism 5, for identifying the completed piston rod.

[0047] It should be noted that the piston rod pre-assembly device in the embodiment is a physical structure. The embodiment does not involve improvement of computer programs, and the main contribution to the prior art lies in the connection relationship or structural relationship between the components or hardware structures in the piston rod pre-assembly device.

[0048] As shown in the drawings, Figure 1 The feeding mechanism 3 is arranged at one side of the conveying mechanism 2, for pre-assembly of the guide sleeve on the piston rod at the first station and pre-assembly of the piston on the piston rod at the second station. Since the feeding mechanism 3 can quickly and accurately pre-assembly the guide sleeve and the piston on the piston rod in sequence, the manual operation time is reduced.

[0049] Specifically, as shown in the drawings, Figure 1 The feeding mechanism 3 comprises a feeding robot 31, a guide sleeve docking station 32, a piston docking station 33 and a buffer table 34. The feeding robot 31 is arranged at one side of the conveying mechanism 2, and the guide sleeve docking station 32, the piston docking station 33 and the buffer table 34 are arranged in sequence around the feeding robot 31. Among them, the buffer table 34 is used to store the guide sleeve and the piston to be pre-assembled.

[0050] Specifically, the feeding robot 31 can selectively grab the guide sleeve in the guide sleeve docking station 32 and the piston in the piston docking station 33, and pre-store them on the buffer table 34. The feeding robot 31 can also selectively pre-assembly the guide sleeve and the piston on the buffer table 34 to the piston rod at the first station and the piston rod at the second station, respectively.

[0051] As shown in the drawings, Figure 3 The end of the feeding robot 31 is provided with a gripping clamp 311, which can grab guide sleeves and pistons of different models. In order to improve the assembly efficiency, the end of the feeding robot 31 is also provided with a laser sensor 312, which scans the position of the guide sleeve and the piston before grabbing them to achieve accurate grabbing. The laser sensor 312 can scan the diameter features of the products to achieve error-proof detection. When assembling the guide sleeve and the piston, the laser sensor 312 can detect the position of the piston rod to ensure that there is no jamming during assembly. It should be noted that the feeding robot 31 involved in the present application is prepared by using the prior art.

[0052] As shown in the drawings, Figure 4As shown, the top of the supporting mechanism 1 is sequentially and spacedly provided with a first sliding guide rail 13 and a second sliding guide rail 14 extending along a second direction b, and the pushing mechanism 4 and the centering and clamping mechanism 5 are movably arranged on the first sliding guide rail 13 and the second sliding guide rail 14 respectively, the pushing mechanism 4 is used for pushing the guide sleeve preassembled on the piston rod at the first station to the designated position of the piston rod, and the centering and clamping mechanism 5 is used for clamping the piston rod at the second station. Wherein, the first direction a and the second direction b are perpendicular. Since the pushing mechanism 4 and the centering and clamping mechanism 5 are movably arranged on the first sliding guide rail 13 and the second sliding guide rail 14 respectively, different models of piston rods can be assembled.

[0053] It should be noted that the first sliding guide rail 13 and the second sliding guide rail 14 are spaced along the first direction a, and the first sliding guide rail 13 and the second sliding guide rail 14 extend along the second direction b.

[0054] In order to improve the assembly accuracy of the guide sleeve, as shown in Figure 4 and Figure 6 The pushing mechanism 4 includes a pushing assembly 41. Specifically, the pushing assembly 41 includes a first sliding plate 411, a first pushing plate 412, a first connecting plate 413 and a first driving electric cylinder 414. The first sliding plate 411 is movably arranged on the first sliding guide rail 13 along the second direction b. The first pushing plate 412 is vertically arranged. The first pushing plate 412 is fixedly connected with the first sliding plate 411 through the first connecting plate 413. The bottom of the first pushing plate 412 is provided with an arc-shaped hole 4121 for the piston rod to pass through. The area of the first pushing plate 412 around the arc-shaped hole 4121 is used for pushing the guide sleeve. The first driving electric cylinder 414 is arranged on the side of the first sliding plate 411 away from the feeding mechanism 3. The first driving electric cylinder 414 can drive the first sliding plate 411 and the first pushing plate 412 to slide on the first sliding guide rail 13.

[0055] In order to push guide sleeves of different sizes, as shown in Figure 4 The pushing mechanism 4 further includes a first lifting assembly 42. Specifically, the first lifting assembly 42 includes a first lifting guide rail 421, a first lifting driving motor 422 and a second pushing plate 423. The top of the first sliding plate 411 is provided with a through hole. The first lifting guide rail 421 is slidably connected with the through hole. The top end of the bottom end of the first lifting guide rail 421 is connected. The bottom end of the second pushing plate 423 can abut against the guide sleeve, and the side surface of the second pushing plate 423 can abut against the stepped surface of the guide sleeve. The driving end of the first lifting driving motor 422 is connected with the top end of the first lifting guide rail 421. The first lifting driving motor 422 can drive the first lifting guide rail 421 to lift relative to the first sliding plate 411, so as to drive the second pushing plate 423 to lift and push the guide sleeve.

[0056] It should be noted that the guide sleeve includes a large end and a small end, and the connection between the large end and the small end forms a stepped surface. The first pushing plate 412 and the second pushing plate 423 can jointly push the guide sleeve, the first pushing plate 412 is used to push the end surface of the small end of the guide sleeve, and the second pushing plate 423 is used to push the stepped surface of the guide sleeve.

[0057] In order to prevent displacement of the piston rod during pushing of the guide sleeve, as shown in Figure 4 and Figure 5 , the piston rod preloading device further includes a rear jacking mechanism 6, which is located directly below the pushing mechanism 4. The bottom of the horizontal support unit 2312 of the support unit 23 is provided with a third sliding guide rail (not shown in the figure), and the third sliding guide rail is arranged along the second direction b. The rear jacking mechanism 6 is movably arranged on the third sliding guide rail along the second direction b, and is used to j ack against the tail of the piston rod located in the first station.

[0058] It should be noted that the end of the piston rod away from the feeding mechanism 3 located in the first station or the second station is the tail of the piston rod.

[0059] Specifically, the rear jacking mechanism 6 includes a third sliding plate 61, a second connecting plate 62, a rear jacking plate 63, and a third drive cylinder 64. The third sliding plate 61 is movably arranged on the third sliding guide rail. The rear jacking plate 63 and the third sliding plate 61 are connected through the second connecting plate 62. The third drive cylinder 64 drives the third sliding plate 61 to slide on the third sliding guide rail, and drives the rear jacking plate 63 to slide to j ack against the tail of the piston rod located in the first station.

[0060] As shown in Figure 5 and Figure 6 , the centering and clamping mechanism 5 includes a moving assembly 51 and a clamping assembly 52. The moving assembly 51 includes a second sliding plate 511, a connecting seat 512, and a second drive cylinder 513. The second sliding plate 511 is movably arranged on the second sliding guide rail 14. The connecting seat 512 is fixedly connected with the second sliding plate 511. The second drive cylinder 513 is connected with the top of the second sliding plate 511. The second drive cylinder 513 can drive the second sliding plate 511 to slide on the second sliding guide rail 14, so as to drive the connecting seat 512 to slide. The clamping assembly 52 is arranged on the side of the connecting seat 512 close to the feeding mechanism 3. The clamping assembly 52 includes two clamping blocks 521 and a clamping drive motor (not shown in the figure). The clamping drive motor can drive the two clamping blocks 521 to move towards or away from each other, so as to clamp or release the tail end of the piston rod.

[0061] Further, as shown in Figure 6As shown, the centering and clamping mechanism 5 further comprises a second lifting assembly 53 capable of centering and clamping different lengths of piston rods. The second lifting assembly 53 comprises a lifting sliding block 531 and a second lifting drive motor 532. The lifting sliding block 531 is slidably arranged on one side of the connecting seat 512 close to the feeding mechanism 3, and the clamping unit is connected to the lifting sliding block 531. The second lifting drive motor 532 is arranged on the top of the lifting sliding block 531, and the second lifting drive motor 532 can drive the lifting sliding block 531 to lift relative to the connecting seat 512.

[0062] In order to prevent the shorter piston rod from being unstable and causing the head to occur, as shown, Figure 4 As shown, the piston rod pre-assembly device further comprises a pressing mechanism 7. The pressing mechanism 7 is connected with the fourth support beam 124, and the pressing mechanism 7 can be raised or lowered to loosen or press the piston rod.

[0063] Specifically, the pressing mechanism 7 comprises a pressing rod 71, a support 72, a third lifting drive motor 73, and two third lifting guide rails 74. The pressing rod 71 is arranged in the first direction a, and the bottom end of the pressing rod 71 is used to press the piston rod. The pressing rod 71 can press the piston rods on all workstations to prevent the piston rods from being overturned. The two third lifting guide rails 74 are both vertically arranged and connected with the two ends of the fourth support beam 124, and the pressing rod 71 is slidably arranged on the two third lifting guide rails 74. The support 72 is vertically arranged and connected with the side end of the first support beam 121. The third lifting drive motor 73 is arranged at the top end of the support 72 to drive the pressing rod 71 to rise or fall, thereby loosening or pressing the piston rod.

[0064] The working process of the utility model is as follows: first, the piston rod to be processed is placed on the V-shaped support frame 231 of the conveying mechanism 2. If the length of the piston rod to be processed is shorter, the pressing rod 71 of the pressing mechanism 7 is lowered to press the piston rod. Then, the piston rod is conveyed to the first workstation, the rear top mechanism 6 moves to the tail of the piston rod, the rear top plate 63 abuts against the tail of the piston rod, the feeding robot 31 grabs the guide sleeve at the guide sleeve joint position 32 and pre-sleeves the guide sleeve to the end of the piston rod, the pushing mechanism 4 adjusts the height of the second pushing plate 423 according to the size of the guide sleeve, and the first pushing plate 412 and the second pushing plate 423 jointly push the guide sleeve to the specified position. Subsequently, the conveying mechanism 2 transports the piston rod to the second workstation, the centering and clamping mechanism 5 clamps the tail of the piston rod, the feeding robot 31 grabs the piston at the piston joint position 33 and pre-sleeves the piston to the end of the piston rod. Finally, the centering and clamping mechanism 5 loosens the piston rod, and the piston rod assembly assembly is completed.

[0065] In the description of the utility model, it is necessary to understand that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0066] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0067] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact of the first and second features, or indirect contact of the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature, can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature, can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is lower than that of the second feature.

[0068] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0069] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can modify, modify, replace and change the above embodiments within the scope of the utility model.

Claims

1. A piston rod pre-assembly device for oil cylinder assembly, characterized by, The device comprises a supporting mechanism (1), a conveying mechanism (2), a feeding mechanism (3), a pushing mechanism (4) and a centering and clamping mechanism (5); The conveying mechanism (2) is located directly below the supporting mechanism (1), and is used for conveying the piston rod in a first direction (a) and selectively stopping the piston rod in the first direction (a) to a first station and a second station; The feeding mechanism (3) is arranged on one side of the conveying mechanism (2), and is used for preassembling a guide sleeve on the piston rod in the first station and preassembling a piston on the piston rod in the second station; The top of the supporting mechanism (1) is sequentially and spacedly provided with a first sliding guide rail (13) and a second sliding guide rail (14) extending in a second direction (b), the pushing mechanism (4) and the centering and clamping mechanism (5) are movably arranged on the first sliding guide rail (13) and the second sliding guide rail (14) respectively, the pushing mechanism (4) is used for pushing the guide sleeve preassembled on the piston rod in the first station to a designated position, and the centering and clamping mechanism (5) is used for clamping the piston rod in the second station, and the first direction (a) and the second direction (b) are perpendicular.

2. The piston rod preassembling device according to claim 1, characterized in that: The pushing mechanism (4) comprises a pushing assembly (41); The pushing assembly (41) comprises a first sliding plate (411), a first pushing plate (412) and a first connecting plate (413), the first sliding plate (411) is movably arranged on the first sliding guide rail (13) in the second direction (b), the first pushing plate (412) is vertically arranged, the first pushing plate (412) is fixedly connected with the first sliding plate (411) through the first connecting plate (413), an arc-shaped hole (4121) is arranged at the bottom of the first pushing plate (412), the arc-shaped hole (4121) is used for passing the piston rod, and the first pushing plate (412) is used for pushing the guide sleeve around the area of the arc-shaped hole (4121).

3. The piston rod preassembling device according to claim 2, characterized in that: The pushing mechanism (4) further comprises a first lifting assembly (42). The first lifting assembly (42) comprises a first lifting guide rail (421), a first lifting drive motor (422) and a second pushing plate (423), a through hole is formed in the top of the first sliding plate (411), the first lifting guide rail (421) is in sliding connection with the through hole, the bottom end of the first lifting guide rail (421) is connected with the top end of the second pushing plate (423), the bottom end of the second pushing plate (423) can abut against the guide sleeve, and the side surface of the second pushing plate (423) can abut against the stepped surface of the guide sleeve, the driving end of the first lifting drive motor (422) is connected with the top end of the first lifting guide rail (421), and the first lifting drive motor (422) can drive the first lifting guide rail (421) to lift relative to the first sliding plate (411) so as to drive the second pushing plate (423) to lift and push the guide sleeve.

4. The pre-assembly device for a piston rod as claimed in claim 1, characterized in that: The centering and clamping mechanism (5) comprises a moving assembly (51) and a clamping assembly (52); The moving assembly (51) comprises a second sliding plate (511) and a connecting seat (512), the second sliding plate (511) is movably arranged on the second sliding guide rail (14) in a second direction (b), and the connecting seat (512) is fixedly connected with the second sliding plate (511); The clamping assembly (52) is arranged on the side of the connecting seat (512) close to the feeding mechanism (3), the clamping assembly (52) comprises two clamping blocks (521), the second sliding plate (511) can drive the clamping assembly (52) to move to the end of the piston rod away from the feeding mechanism (3) at the second station through the connecting seat (512), and the two clamping blocks (521) can move towards or away from each other to clamp or release the piston rod.

5. The pre-assembly device for a piston rod as claimed in claim 4, characterized in that: The centering and clamping mechanism (5) further comprises a second lifting assembly (53); The second lifting assembly (53) comprises a lifting sliding block (531) and a second lifting drive motor (532), the lifting sliding block (531) is slidably arranged on the side of the connecting seat (512) close to the feeding mechanism (3), the clamping assembly (52) is connected with the lifting sliding block (531), and the second lifting drive motor (532) is arranged on the top of the lifting sliding block (531) and can drive the lifting sliding block (531) to lift relative to the connecting seat (512).

6. The pre-assembly device for a piston rod as claimed in claim 1, characterized in that: The feeding mechanism (3) comprises a feeding robot (31), a guide sleeve docking position (32), a piston docking position (33) and a buffer table (34). The feeding robot (31) is arranged on one side of the conveying mechanism (2), and the guide sleeve connecting position (32), the piston connecting position (33) and the buffer table (34) are sequentially arranged around the feeding robot (31).

7. The piston rod preloading device of claim 1, wherein: The conveying mechanism (2) comprises a conveying chain (21) and a plurality of piston rod supporting units (23); The conveying chain (21) is located directly below the supporting mechanism (1), and a plurality of piston rod supporting units (23) are arranged on the conveying chain (21) at intervals for placing the piston rods.

8. The piston rod preloading device of claim 1, wherein: The supporting mechanism (1) comprises a vertical supporting unit (11) and a horizontal supporting unit (12) connected together; The vertical supporting unit (11) comprises four supporting columns (111); The horizontal supporting unit (12) comprises a first supporting beam (121), a second supporting beam (122), a third supporting beam (123) and a fourth supporting beam (124), the first supporting beam (121), the second supporting beam (122) and the third supporting beam (123) are sequentially connected end to end to form a U-shaped horizontal frame, and the fourth supporting beam (124) is connected to the side ends of the first supporting beam (121) and the third supporting beam (123), and the top portions of the four supporting columns (111) are respectively connected to the bottoms of the two ends of the first supporting beam (121) and the third supporting beam (123).

9. The piston rod preloading device of claim 8, wherein: Further comprising a rear jacking mechanism (6); The rear jacking mechanism (6) is located directly below the pushing mechanism (4), the bottom of the horizontal supporting unit (12) is provided with a third sliding guide rail, and the rear jacking mechanism (6) is movably arranged on the third sliding guide rail, and the rear jacking mechanism (6) is used for jacking the end of the piston rod away from the feeding mechanism (3) located at the first station.

10. The piston rod preloading device of claim 8, wherein: Further comprising a pressing mechanism (7); The pressing mechanism (7) is connected with the fourth supporting beam (124), and the pressing mechanism (7) can be raised or lowered to loosen or press the piston rod.

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