Pneumatic rotary clamping hand

Abstract

The utility model discloses a pneumatic rotary clamping hand which comprises a mounting plate, a rotary motor, a rotary shaft, a rotary lower valve body, a rotary upper valve body, a rotary bearing, a pneumatic clamping hand body, a clamping jaw assembly and a sealing assembly. A shaft body of the rotating shaft sequentially penetrates through the rotating upper valve body and the rotating lower valve body and then is in transmission connection with an output shaft of the rotating motor, the rotating upper valve body and the rotating lower valve body are rotatably arranged between a limiting end cover and a mounting plate of the rotating shaft, and the starting clamping hand is fixedly mounted at the top of the limiting end cover; the rotary lower valve body and the rotary lower valve body are provided with an air inlet A and an air inlet B which communicate with the inner side wall and the outer side wall of the rotary lower valve body correspondingly, and a first air path and a second air path which communicate with the air inlet A and the air inlet B correspondingly are formed in the rotary shaft. According to the utility model, random rotation can be realized without gas interruption, accurate positioning of continuous rotation of a product and pipeline transfer of a gas circuit during rotation can be realized, and the accuracy and stability of rotation are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic rotary clamps, and more specifically to a pneumatic rotary clamp. Background Art

[0002] Pneumatic rotary clamps are a series of products specially designed for pneumatic control. They have the advantages of small size, light weight, and small friction torque. They are used to clamp rotating workpieces. They are generally widely used in automation equipment in industrial production, and can accurately clamp, rotate, and position various workpieces. For example, the utility model authorization announcement number CN219017444U provides a winding spindle with pneumatic clamps, including an air supply device, a fixing assembly, and a pneumatic clamp. The air supply device includes a spindle, an air supply channel located at the axis of the spindle, and the spindle is rotated by the driving mechanism to realize the rotation of the pneumatic clamp. A sealing ring is also provided at the connection between the pneumatic clamp and the spindle, and a connector is provided so that the spindle can maintain connection with the air pump while rotating. However, the patent only has a single air path and a sealing ring. During rotation, due to the poor sealing effect of the single sealing ring, air leakage is likely to occur, resulting in the pneumatic clamp being unable to maintain a stable air pressure and being cut off. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects in the prior art and to provide a pneumatic rotary gripper which can realize arbitrary rotation without interrupting the gas flow, can realize precise positioning of the continuous rotation of the product and pipeline transfer of the gas path during rotation, and ensure the accuracy and stability of the rotation.

[0004] To achieve the above-mentioned purpose, the utility model provides a pneumatic rotary gripper, comprising a mounting plate, a rotary motor, a rotary shaft, a rotary lower valve body, a rotary upper valve body, a pneumatic gripper, a clamping jaw assembly and a sealing assembly, wherein the rotary motor is arranged upward on the bottom surface of the mounting plate, and the output shaft of the rotary motor extends out of the top surface of the mounting plate, and the shaft body of the rotary shaft sequentially passes through the rotary upper valve body and the rotary lower valve body and is transmission-connected with the output shaft of the rotary motor, the rotary upper valve body and the rotary lower valve body are rotatably arranged between the limit end cover of the rotary shaft and the mounting plate, the starting gripper is fixedly mounted on the top of the limit end cover, the rotary lower valve body is provided with an air inlet A connected to the inner and outer side walls thereof, and the rotary lower valve body is provided with an air inlet B connected to the inner and outer side walls thereof. The pneumatic gripper has an air cavity formed therein, and a third air pipe joint and a fourth air pipe joint communicating with the air cavity are mounted on the outer wall of the pneumatic gripper, the first air pipe joint and the third air pipe joint as well as the second air pipe joint and the fourth air pipe joint being connected to each other through an air pipe. The first air pipe joint and the third air pipe joint as well as the second air pipe joint and the fourth air pipe joint are connected to each other through an air pipe. The jaw assembly has a plurality of groups and are movably mounted on the top of the pneumatic gripper.

[0005] Preferably, the sealing assembly includes a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring. The bottom surface of the rotating upper valve body is convexly provided with an annular convex edge and is concave inwardly formed to form a third sealing groove located below the air inlet B port. The top surface of the rotating lower valve body is concavely provided with an annular groove located above the air inlet A port. The outer wall of the annular convex edge contacts the inner wall of the annular groove. The first sealing ring is sleeved on the rotating shaft and can contact the inner wall of the third sealing groove to achieve sealing. The interior of the rotating lower valve body is provided with a second sealing groove located below the air inlet A port. The second sealing ring is sleeved on the rotating shaft and can contact the inner wall of the second sealing groove to achieve sealing.

[0006] Preferably, the third sealing ring is sleeved on the rotating shaft and located on the top surface of the first sealing ring, and the third sealing ring can contact the inner wall of the third sealing groove to achieve sealing. The interior of the rotating upper valve body is provided with a fourth sealing groove located above the air inlet B port, and the fourth sealing ring is sleeved on the rotating shaft and can contact the inner wall of the fourth sealing groove to achieve sealing.

[0007] Preferably, it also includes a first rotating bearing and a second rotating bearing, the bottom surface of the rotating lower valve body is recessed with a first rotating groove located at the bottom of the second sealing groove, the top surface of the rotating upper valve body is recessed with a second rotating groove located at the top of the fourth sealing groove, the first rotating bearing is sleeved on the rotating shaft and rotatably arranged in the first rotating groove, and the second rotating bearing is sleeved on the rotating shaft and rotatably arranged in the second rotating groove.

[0008] Preferably, the outer side wall of the shaft body is provided with a first air inlet and a second air inlet which are respectively connected with the first air path and the second air path and the air inlet A and the air inlet B.

[0009] Preferably, an O-ring is further included, wherein the O-ring is sleeved on the outer wall of the annular protrusion and is located inside the top end of the rotating lower valve body.

[0010] Preferably, the clamping jaw assembly comprises a plurality of clamping jaw mounting seats and a plurality of clamping jaws, the top surface of the pneumatic clamp is surrounded by a plurality of clamping jaw slide grooves, the cross-sectional shape of the clamping jaw mounting seats is convex-shaped and are movably limitedly mounted inside each clamping jaw slide groove and are connected to the internal transmission of the pneumatic clamp, the clamping jaws are fixedly arranged on the top of the clamping jaw mounting seats, the head ends of the clamping jaws are in an inverted L-shape and the inner walls of the clamping parts of the vertical sections are arc-shaped concave surfaces, and the clamping parts of each clamping jaw can be driven by the pneumatic clamping jaw to move closer to or away from each other so as to achieve clamping and release of cylindrical products.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model has a simple structure and a reasonable design. A rotating motor drives a rotating shaft and a pneumatic clamp to rotate relative to a rotating lower valve body and a rotating upper valve body. Gas enters a first gas path and a second gas path from gas inlet A and gas inlet B respectively. The two gas paths are separated by a sealing component to prevent gas leakage. Each gas path is connected from the rotating shaft to the pneumatic clamp, thereby realizing gas path transfer. The utility model can realize arbitrary rotation without interrupting gas flow, can realize precise positioning of continuous rotation of the product and pipeline transfer of the gas path during rotation, thereby ensuring the accuracy and stability of the rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1It is a structural schematic diagram of a pneumatic rotary gripper provided by an embodiment of the utility model;

[0015] Figure 2 It is a cross-sectional schematic diagram of a pneumatic rotary gripper provided by an embodiment of the utility model;

[0016] Figure 3 It is an exploded schematic diagram of a pneumatic rotary gripper provided by an embodiment of the utility model;

[0017] Figure 4 It is a cross-sectional schematic diagram of a rotating upper valve body of a pneumatic rotating gripper provided by an embodiment of the utility model;

[0018] Figure 5 It is a cross-sectional schematic diagram of a rotating lower valve body of a pneumatic rotating gripper provided by an embodiment of the utility model;

[0019] Figure 6 It is a cross-sectional schematic diagram of a rotating shaft of a pneumatic rotating gripper provided by an embodiment of the utility model;

[0020] Figure 7 It is a partial structural exploded schematic diagram of a pneumatic rotary gripper provided by an embodiment of the utility model;

[0021] Figure 8 It is a schematic diagram of the assembly of a pneumatic rotary gripper provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Please refer to Figure 1 An embodiment of the utility model provides a pneumatic rotary gripper, comprising a mounting plate 1, a rotary motor 2, a rotary shaft 3, a rotary lower valve body 4, a rotary upper valve body 5, a pneumatic gripper 7, a clamping jaw assembly 8 and a sealing assembly 9. The various components of this embodiment are described in detail below in conjunction with the accompanying drawings.

[0024] like Figure 1As shown, the rotating motor 2 can be arranged upward on the bottom surface of the mounting plate 1, and the output shaft of the rotating motor 2 extends out of the top surface of the mounting plate 1. The shaft body 31 of the rotating shaft 3 passes through the rotating upper valve body 5 and the rotating lower valve body 4 in sequence and is transmission-connected with the output shaft of the rotating motor 2. The rotating upper valve body 5 and the rotating lower valve body 4 are rotatably arranged between the limiting end cover 32 of the rotating shaft 3 and the mounting plate 1. The pneumatic clamp 7 is fixedly installed on the top of the limiting end cover 32, and the clamping jaw assembly 8 is provided with a plurality of groups and is movably arranged on the top of the pneumatic clamp 7 respectively.

[0025] like Figure 2 , Figure 3 and Figure 6 As shown, the rotating lower valve body 4 may be provided with an air inlet A port 41 connecting the inner and outer side walls thereof, the rotating upper valve body 5 may be provided with an air inlet B port 51 connecting the inner and outer side walls thereof, the interior of the rotating shaft 3 may be provided with a first air path 33 and a second air path 34 respectively connected to the air inlet A port 41 and the air inlet B port 51, the sealing assembly 9 may be respectively embedded in the interior of the rotating upper valve body 5 and the rotating lower valve body 4 and may seal and separate the first air path 33 and the second air path 34, the outer side wall of the limiting end cover 32 may be provided with a first air pipe joint 321 and a second air pipe joint 322 respectively connected to the first air path 33 and the second air path 34, the interior of the pneumatic gripper 7 may be provided with an air cavity 71, the outer side wall of the pneumatic gripper 7 may be provided with a third air pipe joint 72 and a fourth air pipe joint 73 connecting to the air cavity 71, the first air pipe joint 321 and the third air pipe joint 72 as well as the second air pipe joint 322 and the fourth air pipe joint 73 may be connected via air pipes.

[0026] Specifically, the outer wall of the shaft body 31 may be provided with a first air inlet 311 and a second air inlet 312 which are respectively connected to the first air path 33 and the second air path 34 and the air inlet A port 41 and the air inlet B port 51 .

[0027] like Figure 4 and Figure 5 As shown, the sealing assembly 9 may include a first sealing ring 91, a second sealing ring 92, a third sealing ring 93 and a fourth sealing ring 94. The bottom surface of the rotating upper valve body 5 is convexly provided with an annular ridge 52 and is concave inwardly formed to form a third sealing groove 53 located below the air inlet B port 51. The top surface of the rotating lower valve body 4 is concavely provided with an annular groove 42 located above the air inlet A port 41. The outer wall of the annular ridge 52 contacts the inner wall of the annular groove 42. The first sealing ring 91 is sleeved on the rotating shaft 3 and can contact the inner wall of the third sealing groove 53 to achieve sealing. The interior of the rotating lower valve body 4 is provided with a second sealing groove 43 located below the air inlet A port 41. The second sealing ring 92 is sleeved on the rotating shaft 3 and can contact the inner wall of the second sealing groove 43 to achieve sealing.

[0028] Furthermore, the third sealing ring 93 can be sleeved on the rotating shaft 3 and located on the top surface of the first sealing ring 91. The third sealing ring 93 can contact the inner wall of the third sealing groove 53 to achieve sealing. The interior of the rotating upper valve body 5 is provided with a fourth sealing groove 54 located above the air inlet B port 51. The fourth sealing ring 94 is sleeved on the rotating shaft 3 and can contact the inner wall of the fourth sealing groove 54 to achieve sealing.

[0029] Specifically, it may further include a first rotating bearing 61 and a second rotating bearing 62, the bottom surface of the rotating lower valve body 4 is concavely provided with a first rotating groove 44 located at the bottom of the second sealing groove 43, the top surface of the rotating upper valve body 5 is concavely provided with a second rotating groove 55 located at the top of the fourth sealing groove 54, the first rotating bearing 61 is sleeved on the rotating shaft 3 and rotatably arranged in the first rotating groove 44, and the second rotating bearing 62 is sleeved on the rotating shaft 3 and rotatably arranged in the second rotating groove. Among them, the first rotating bearing 61 and the second rotating bearing 62 can support the rotating shaft 3 to ensure smooth rotation.

[0030] Preferably, an O-ring 10 may also be included. The O-ring 10 is sleeved on the outer wall of the annular protrusion 52 and is located inside the top end of the rotating lower valve body 4 .

[0031] The pneumatic gripper 7 is connected to the rotating shaft 3 through the first gas path 33 and the second gas path 34, receives gas from an external gas source, and realizes gas path transfer. The sealing assembly 9 and the O-ring 10 can be used to isolate the upper and lower first gas paths 33 and the second gas path 34, ensure the circulation of gas in each gas path and prevent gas from leaking from the gap between the rotating upper valve body 5 and the rotating lower valve body 4. In addition, the pneumatic gripper 7 is a pneumatic clamp in the prior art, and the opening and closing of the clamping jaw assembly 8 are realized by supplying and cutting off air, which should be known to those skilled in the art, so its structure will not be described in detail here.

[0032] like Figure 7 As shown, the clamp assembly 8 may include a plurality of clamp mounting seats 81 and a plurality of clamping jaws 82. The top surface of the pneumatic gripper 7 is surrounded by a plurality of clamping jaw slots 74. The cross-sectional shape of the clamp mounting seat 81 is convex and is movably limited and mounted inside each clamping jaw slot 74 and is connected to the internal transmission of the pneumatic gripper 7. The clamping jaws 82 are fixedly mounted on the top of the clamp mounting seat 81. The head ends of the clamping jaws 82 are all in an inverted L-shaped arrangement and the inner walls of the clamping portions 821 of the vertical sections are all arc-shaped concave surfaces. The clamping portions 821 of each clamping jaw 82 can be driven by the pneumatic gripper 7 to move closer or farther from each other to achieve the clamping and release of the columnar product. In this embodiment, the columnar product can be the columnar portion at the bottom of the gear 110.

[0033] The working principle of this embodiment is as follows:

[0034] like Figure 8 As shown, first, the cylindrical part at the bottom of the gear is placed between each gripper, and the gas enters the rotating shaft from the air inlet A and the air inlet B through the corresponding rotating lower valve body and the rotating upper valve body, and then is transferred from each air pipe joint to the air cavity in the pneumatic gripper through the air pipe. The four sealing rings can respectively isolate the first air path and the second air path to prevent gas leakage. Then the pneumatic gripper drives the clamping jaw mounting seat to move inward and brings each gripper close to each other to clamp and fix the gear. The rotating motor drives the rotating shaft and the pneumatic gripper to rotate relative to the rotating lower valve body and the rotating upper valve body, thereby driving the gear to rotate. In this way, the pneumatic gripper can be continuously ventilated during the continuous rotation process.

[0035] In summary, the utility model can realize arbitrary rotation without interrupting gas flow, can realize precise positioning of continuous rotation of the product and pipeline transfer of the gas path during rotation, and ensure the accuracy and stability of rotation.

[0036] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A pneumatic rotary gripper, characterized in that: The invention comprises a mounting plate (1), a rotating motor (2), a rotating shaft (3), a rotating lower valve body (4), a rotating upper valve body (5), a pneumatic gripper (7), a clamping claw assembly (8) and a sealing assembly (9), wherein the rotating motor (2) is arranged upward on the bottom surface of the mounting plate (1), the output shaft of the rotating motor (2) extends out of the top surface of the mounting plate (1), and the shaft body (31) of the rotating shaft (3) passes through the rotating upper valve body (5) and the rotating lower valve body (4) in sequence and then is connected to the output shaft of the rotating motor (2). The rotating shaft (3) is connected to the output shaft by transmission, the rotating upper valve body (5) and the rotating lower valve body (4) are rotatably arranged between the limiting end cover (32) of the rotating shaft (3) and the mounting plate (1), the pneumatic gripper (7) is fixedly mounted on the top of the limiting end cover (32), the rotating lower valve body (4) is provided with an air inlet A port (41) connected to the inner and outer side walls thereof, the rotating upper valve body (5) is provided with an air inlet B port (51) connected to the inner and outer side walls thereof, and the interior of the rotating shaft (3) is provided with air inlet ports (41) connected to the inner and outer side walls thereof, respectively. The first gas path (33) and the second gas path (34) are connected to the gas inlet A port (41) and the gas inlet B port (51), the sealing assembly (9) is respectively embedded in the interior of the rotating upper valve body (5) and the rotating lower valve body (4) and can seal and separate the first gas path (33) and the second gas path (34), and the outer wall of the limiting end cover (32) is equipped with a first gas pipe joint (321) and a second gas pipe joint (322) which are respectively connected to the first gas path (33) and the second gas path (34). ), an air cavity (71) is provided inside the pneumatic gripper (7), a third air pipe joint (72) and a fourth air pipe joint (73) communicating with the air cavity (71) are installed on the outer wall of the pneumatic gripper (7), the first air pipe joint (321) and the third air pipe joint (72) as well as the second air pipe joint (322) and the fourth air pipe joint (73) are connected via air pipes, and the clamping jaw assembly (8) is provided with a plurality of groups and is movably arranged on the top of the pneumatic gripper (7).

2. A pneumatic rotary gripper according to claim 1, characterized in that: The sealing assembly (9) comprises a first sealing ring (91), a second sealing ring (92), a third sealing ring (93) and a fourth sealing ring (94); the bottom surface of the rotating upper valve body (5) is convexly provided with an annular convex edge (52) and is concavely provided inwardly to form a third sealing groove (53) located below the air inlet B port (51); the top surface of the rotating lower valve body (4) is concavely provided with an annular groove (42) located above the air inlet A port (41); the outer wall of the annular convex edge (52) contacts the inner wall of the annular groove (42); the first sealing ring (91) is sleeved on the rotating shaft (3) and can contact the inner wall of the third sealing groove (53) to achieve sealing; the interior of the rotating lower valve body (4) is provided with a second sealing groove (43) located below the air inlet A port (41); the second sealing ring (92) is sleeved on the rotating shaft (3) and can contact the inner wall of the second sealing groove (43) to achieve sealing.

3. A pneumatic rotary gripper according to claim 2, characterized in that: The third sealing ring (93) is sleeved on the rotating shaft (3) and is located on the top surface of the first sealing ring (91); the third sealing ring (93) is capable of contacting the inner wall of the third sealing groove (53) to achieve sealing; the interior of the rotating upper valve body (5) is provided with a fourth sealing groove (54) located above the air inlet B port (51); the fourth sealing ring (94) is sleeved on the rotating shaft (3) and is capable of contacting the inner wall of the fourth sealing groove (54) to achieve sealing.

4. A pneumatic rotary gripper according to claim 3, characterized in that: It also includes a first rotating bearing (61) and a second rotating bearing (62); the bottom surface of the rotating lower valve body (4) is recessed with a first rotating groove (44) located at the bottom of the second sealing groove (43); the top surface of the rotating upper valve body (5) is recessed with a second rotating groove (55) located at the top of the fourth sealing groove (54); the first rotating bearing (61) is sleeved on the rotating shaft (3) and rotatably arranged in the first rotating groove (44); the second rotating bearing (62) is sleeved on the rotating shaft (3) and rotatably arranged in the second rotating groove (55).

5. The pneumatic rotary gripper according to claim 1, characterized in that: The outer wall of the shaft body (31) is provided with a first air inlet (311) and a second air inlet (312) which are respectively connected to the first air path (33) and the second air path (34) and the air inlet A (41) and the air inlet B (51).

6. The pneumatic rotary gripper according to claim 1, characterized in that: It also includes an O-ring (10), which is sleeved on the outer wall of the annular protrusion (52) and located inside the top end of the rotating lower valve body (4).

7. The pneumatic rotary gripper according to claim 1, characterized in that: The clamping jaw assembly (8) comprises a plurality of clamping jaw mounting seats (81) and a plurality of clamping jaws (82). The top surface of the pneumatic gripper (7) is surrounded by a plurality of clamping jaw sliding grooves (74). The cross-sectional shape of the clamping jaw mounting seats (81) is convex-shaped and is movably limitedly mounted inside each clamping jaw sliding groove (74) and is connected to the internal transmission of the pneumatic gripper (7). The clamping jaws (82) are fixedly mounted on the top of the clamping jaw mounting seats (81). The head ends of the clamping jaws (82) are all in an inverted L-shape and the inner walls of the clamping portions (821) of the vertical sections are all arc-shaped concave surfaces. The clamping portions (821) of each clamping jaw (82) can be driven by the pneumatic gripper (7) to move closer to or farther from each other so as to achieve clamping and release of the columnar product.

Images