Transfer gripper for engine cylinder block

Abstract

The invention discloses an engine cylinder block transferring gripper, and belongs to the technical field of engine cylinder block machining. The upper rotating shaft and the lower rotating shaft are rotatably mounted on the base frame in parallel; the two ends of the upper rotating shaft are provided with reverse upper threaded sections respectively. Two reverse lower threaded sections are formed in the middle of the lower rotating shaft; the right clamping jaw assembly and the left clamping jaw assembly are symmetrical; according to the left clamping jaw assembly, an outer sliding block is installed on a lower rotating shaft in a sliding mode and connected with an upper rotating shaft in a meshed mode; the inner sliding block is slidably mounted on the upper rotating shaft and meshed with the lower rotating shaft; the lower ends of the outer sliding block and the inner sliding block are connected with the left clamping jaw through an outer supporting rod and an inner supporting rod respectively. The outer sliding block and the inner sliding block can synchronously move through the threaded sections and the polished shaft sections on the upper rotating shaft and the lower rotating shaft so as to adjust the distance between the left clamping jaw assembly and the right clamping jaw assembly, the inner sliding block can be independently adjusted so as to control opening and closing of the left clamping jaw assembly and the right clamping jaw assembly, and the grabbing and transferring device can adapt to grabbing and transferring of engine cylinder blocks of different sizes.

Description

Technical Field

[0001] The invention relates to the technical field of engine cylinder body processing, and in particular to an engine cylinder body transfer gripper. Background Art

[0002] In the modern automobile manufacturing and machining industries, the handling and transfer of engine blocks is an indispensable part of the production process. With the continuous development of automation technology, automated transfer equipment has gradually become the mainstream. Among them, the engine block transfer gripper is a key component, and its design performance and stability directly affect the efficiency and product quality of the entire production line.

[0003] However, the existing engine cylinder transfer grippers still have some design deficiencies. For example, when clamping the engine cylinder, some grippers are often difficult to adapt to cylinders of different sizes due to the fixedness and rigidity of the jaws, resulting in unstable or impossible clamping. Summary of the invention

[0004] In view of the above-mentioned technical deficiencies, the present invention provides an engine cylinder transfer gripper.

[0005] The present invention adopts the following technical solution: an engine cylinder transfer gripper, comprising a base frame; An upper rotating shaft is rotatably mounted on the base frame; both ends of the upper rotating shaft are respectively provided with upper threaded sections in opposite directions, and the middle portion of the upper rotating shaft is an optical axis; The lower rotating shaft is arranged parallel to the lower part of the upper rotating shaft and is rotatably mounted on the base frame; the middle part of the lower rotating shaft is provided with two sections of lower threaded sections in opposite directions, and the two ends of the lower rotating shaft are optical axes; A left clamping jaw assembly is mounted on the left ends of the upper rotating shaft and the lower rotating shaft; A right clamping jaw assembly is installed at the right end of the upper rotating shaft and the lower rotating shaft; the right clamping jaw assembly is symmetrical with the left clamping jaw assembly; Wherein, the left clamping jaw assembly comprises: An outer sliding block is slidably mounted on the optical axis at the left end of the lower rotating shaft and is meshedly connected with the upper threaded section at the left end of the upper rotating shaft; An inner sliding block is slidably mounted on the optical axis on the left side of the middle portion of the upper rotating shaft and is meshedly connected with the lower threaded section on the left side of the middle portion of the lower rotating shaft; An outer support rod is fixed to the lower end of the outer slider; the lower end of the outer support rod is biased toward the inner slider; An inner support rod is fixed to the lower end of the inner slider; the lower end of the inner support rod is biased toward the outer slider; The left clamp has one end hinged to the lower end of the outer support rod and the other end is provided with a long hole; the lower end of the inner support rod is fixed with a sliding pin that slides through the long hole, and the position of the sliding pin is lower than the hinge point between the outer support rod and the left clamp.

[0006] The invention further comprises: a bayonet is provided at the left end of the left clamping jaw; The left pad is fitted in the bayonet and fixedly connected with the left clamp through bolts; the end of the left pad away from the left clamp has two symmetrical protrusions, and the end of the protrusion away from the left clamp is arc-shaped.

[0007] The outer support rod and the inner support rod are both L-shaped, and the lower ends of the outer support rod and the inner support rod are both provided with connecting ear plates.

[0008] The upper end of the base frame is provided with a plurality of threaded holes, the lower end of the base frame is provided with a U-shaped opening, and the two ends of the upper rotating shaft and the lower rotating shaft are rotatably mounted on the two side walls of the U-shaped opening through bearings respectively.

[0009] The left end of the upper rotating shaft is connected to a left driving motor, which is fixed on the left side wall of the U-shaped opening; the right end of the lower rotating shaft is connected to a right driving motor, which is fixed on the right side wall of the U-shaped opening.

[0010] A T-shaped middle support plate fixed to the base frame is arranged in the middle of the U-shaped opening, and the middle parts of the upper rotating shaft and the lower rotating shaft respectively pass through the middle support plate and are rotatably connected to the middle support plate through bearings.

[0011] Sealing plates covering the side surfaces of the U-shaped opening are fixed to both sides of the base frame respectively.

[0012] A pair of wear-resistant plates are respectively arranged on both sides of the left clamping jaw assembly and the right clamping jaw assembly, and slots matching with the wear-resistant plates are opened on both side edges of the middle support plate and the two side walls of the U-shaped opening, and the two ends and the middle part of the wear-resistant plates are respectively embedded in the corresponding slots; the sealing plate is pressed on the outer side of the wear-resistant plate, and the inner side of the wear-resistant plate is pressed on the surface of the outer slider and the inner slider in the left clamping jaw assembly and the right clamping jaw assembly.

[0013] The beneficial effects of the present invention are: The invention realizes horizontal driving and horizontal guiding of the outer and inner sliders through the cooperation of the thread segments and the optical axis segments on the upper and lower rotating shafts; the upper and lower staggered thread segments on the upper and lower rotating shafts are designed so that the outer and inner sliders can move synchronously to adjust the spacing between the left and right clamping jaw assemblies, and the inner slider can be adjusted separately to control the opening and closing of the left and right clamping jaw assemblies, so as to adapt to the grabbing and transfer of engine cylinders of different sizes; The left and right clamping jaw assemblies can adjust the angle of the clamping jaws through the design of hinges and sliding pins to ensure that the clamping jaws can fit tightly against the inner wall of the cylinder body; friction self-locking is achieved by tilting at a large angle, and the pressure at the end of the clamping jaw is increased by the lever principle to improve the stability of the grasping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention 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 only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A three-dimensional engine cylinder transfer gripper according to the present invention Figure 1 .

[0016] Figure 2 A three-dimensional engine cylinder transfer gripper according to the present invention Figure 2 (The front sealing plate and a wear-resistant plate on the front side are omitted in the figure).

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0018] Figure 4 The present invention is a schematic diagram of the working state of an engine cylinder transfer gripper.

[0019] Figure 5 It is a structural schematic diagram of the left clamping jaw assembly.

[0020] Figure 6 It is a schematic diagram of the structure of the left clamp and the left pad.

[0021] Description of reference numerals: 1. Base frame; 11. U-shaped opening; 12. Closing plate; 13. Middle support plate; 2. upper rotating shaft; 21. upper threaded section; 3. Lower rotating shaft; 31. Lower threaded section; 4. Left clamping jaw assembly; 41. outer slider; 42. inner slider; 43. outer support rod; 44. inner support rod; 441. sliding pin; 45. left clamping jaw; 451. long hole; 452. bayonet; 46. left pad; 461. protrusion; 5. Right clamping jaw assembly; 6. Left drive motor; 7. Right drive motor; 8. Wear-resistant plate; 81. Card slot; 9. Engine block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Embodiment 1: like Figures 1 to 4 As shown, the present invention provides an engine cylinder transfer gripper. A plurality of threaded holes are provided at the upper end of the base frame 1 for connection with a robotic arm. The lower end of the base frame 1 has a U-shaped opening 11, and the two ends of the upper rotating shaft 2 and the lower rotating shaft 3 are rotatably mounted on the two side walls of the U-shaped opening 11 through bearings respectively. The lower rotating shaft 3 is arranged in parallel below the upper rotating shaft 2. The left end of the upper rotating shaft 2 is connected to the left driving motor 6, and the left driving motor 6 is fixed to the outer side of the left side wall of the U-shaped opening 11 through a flange. The right end of the lower rotating shaft 3 is connected to the right driving motor 7, and the right driving motor 7 is fixed to the outer side of the right side wall of the U-shaped opening 11 through a flange, and the left driving motor 6 and the right driving motor 7 are of the same model.

[0024] The centers of the upper rotating shaft 2, the lower rotating shaft 3 and the base frame 1 are on the same straight line, and the upper rotating shaft 2, the lower rotating shaft 3 and the base frame 1 are symmetrical along the center. The two ends of the upper rotating shaft 2 are respectively provided with a reverse upper thread segment 21, and the middle of the upper rotating shaft 2 is the optical axis. The middle of the lower rotating shaft 3 is provided with two reverse lower thread segments 31, and the two ends of the lower rotating shaft 3 are the optical axes. Figure 3 As shown, the two upper thread segments 21 and the two lower thread segments 31 are staggered up and down, and the pitch and diameter of the upper thread segment 21 and the lower thread segment 31 are consistent.

[0025] Combination Figures 2 to 5 As shown, the left clamping jaw assembly 4 is installed on the left side of the upper rotating shaft 2 and the lower rotating shaft 3, and the right clamping jaw assembly 5 is installed on the right side of the upper rotating shaft 2 and the lower rotating shaft 3. The right clamping jaw assembly 5 is symmetrical with the left clamping jaw assembly 4. This embodiment takes the left clamping jaw assembly 4 as an example for explanation: The left clamping jaw assembly 4 includes an outer slider 41 and an inner slider 42. A threaded hole is formed at the upper end of the outer slider 41, and a light hole is formed at the lower end of the outer slider 41; the light hole at the lower end of the outer slider 41 is slidably mounted on the light axis at the left end of the lower rotating shaft 3, and the threaded hole at the upper end of the outer slider 41 is meshed and connected with the upper threaded section 21 at the left end of the upper rotating shaft 2. When in use, the outer slider 41 is driven by the upper rotating shaft 2, and the upper rotating shaft 2 provides a guiding and anti-rotation function; The upper end of the inner slider 42 is provided with a light hole, and the lower end of the outer slider 41 is provided with a threaded hole; the light hole at the upper end of the inner slider 42 is slidably mounted on the light axis at the middle left of the upper rotating shaft 2, and the threaded hole at the lower end of the inner slider 42 is meshedly connected with the lower threaded section 31 at the middle left of the lower rotating shaft 3; when in use, the inner slider 42 is driven by the lower rotating shaft 3, and the upper rotating shaft 2 provides a guiding and anti-rotation function; The outer support rod 43 is fixed to the lower end of the outer slider 41 by bolts, and the inner support rod 44 is fixed to the lower end of the inner slider 42 by bolts. The outer support rod 43 and the inner support rod 44 are both L-shaped, wherein the lower end of the outer support rod 43 is biased toward the inner slider 42, and the lower end of the inner support rod 44 is biased toward the outer slider 41, so that there is a distance between the outer slider 41 and the inner slider 42, so as to facilitate the adjustment of the outer slider 41 and the inner slider 42 to move left and right along the upper shaft 2 and the lower shaft 3; The lower ends of the outer support rod 43 and the inner support rod 44 are provided with connecting ear plates, and the left clamping jaw 45 is arranged in the connecting ear plates. One end of the left clamping jaw 45 is hinged to the lower end of the outer support rod 43 through a rotating shaft, and the other end of the left clamping jaw 45 is provided with a long hole 451. A sliding pin 441 is fixed to the lower end of the inner support rod 44, and the sliding pin 441 is slidably inserted into the long hole 451. Among them, the position of the sliding pin 441 is lower than the position of the hinge rotating shaft between the outer support rod 43 and the left clamping jaw 45. When the outer support rod 43 and the inner support rod 44 move relatively, the angle of the left clamping jaw 45 can be adjusted so that the left end of the left clamping jaw 45 is against the inner wall of the engine cylinder body 9, and the position of the sliding pin 441 is also far away from the rotating shaft, and the pressure on the left end of the left clamping jaw 45 is increased by using the lever principle.

[0026] Recombination Figure 6 As shown, the left end of the left clamping jaw 45 is provided with a bayonet 452 for mounting the left cushion block 46. The left cushion block 46 is mounted in the bayonet 452 and is fixedly connected to the left clamping jaw 45 by bolts. The left cushion block 46 has two symmetrical protrusions 461 at one end away from the left clamping jaw 45. The end of the protrusion 461 away from the left clamping jaw 45 is arc-shaped, and the arc centers of the protrusions 461 are at the same point.

[0027] Working principle: like Figure 3 and Figure 4 As shown, first, the left drive motor 6 and the right drive motor 7 are started at the same time, and the upper shaft 2 and the lower shaft 3 begin to rotate. Taking the left clamping jaw assembly 4 as an example, at this time, the outer slider 41 and the inner slider 42 move at the same speed and in the same direction, and the distance from the left clamping jaw assembly 4 to the center can be adjusted; and the right clamping jaw assembly 5 is symmetrical with the left clamping jaw assembly 4 in structure, so that the distance between the left clamping jaw assembly 4 and the right clamping jaw assembly 5 is adjusted, so that the transfer gripper can adapt to different sizes of engine cylinders 9; After adjusting the approximate distance between the left clamping jaw assembly 4 and the right clamping jaw assembly 5, move the left clamping jaw assembly 4 and the right clamping jaw assembly 5 to the two cylinder barrels in the engine cylinder block 9 respectively. The position where the engine cylinder block 9 is placed cannot be stuck, and the engine cylinder block 9 must be allowed to move to a certain extent; Then the right drive motor 7 is started, the lower shaft 3 starts to rotate, and the inner slide blocks 42 in the left clamping jaw assembly 4 and the right clamping jaw assembly 5 start to move inward at the same speed; taking the left clamping jaw assembly 4 as an example, at this time, the sliding pin 441 at the lower end of the inner support rod 44 is opened to push the left clamping jaw 45 to rotate, so that the left pad 46 at the left end of the left clamping jaw 45 abuts against the inner wall of the engine cylinder body 9, and similarly, the right pad in the right clamping jaw assembly 5 will also abut against the inner wall of the engine cylinder body 9; at this time, maintaining a certain output torque of the right drive motor 7, the left clamping jaw assembly 4 and the right clamping jaw assembly 5 will clamp the engine cylinder body 9, and finally transfer it to a predetermined position through the mechanical arm.

[0028] Embodiment 2: Based on the above embodiment 1, Figures 1 to 4 As shown, in order to improve the stability of the outer slider 41 and the inner slider 42, a T-shaped middle support plate 13 is arranged in the middle of the U-shaped opening 11. The upper end of the middle support plate 13 is fixed to the base frame 1 by bolts, and two mounting holes are provided at the lower end of the middle support plate 13. The middle parts of the upper rotating shaft 2 and the lower rotating shaft 3 respectively pass through the mounting holes on the middle support plate 13, and are rotatably connected to the middle support plate 13 through bearings. The base frame 1 is respectively fixed with sealing plates 12 covering the sides of the U-shaped opening 11, and the sealing plates 12 on both sides seal the upper rotating shaft 2, the lower rotating shaft 3, the left clamping jaw assembly 4 and the right clamping jaw assembly 5 in the middle.

[0029] A pair of wear-resistant plates 8 are respectively arranged on both sides of the left clamping jaw assembly 4 and the right clamping jaw assembly 5. Slots 81 cooperating with the wear-resistant plates 8 are provided on both sides of the middle support plate 13 and the two side walls of the U-shaped opening 11. The two ends and the middle of the wear-resistant plate 8 are respectively embedded in the corresponding slots 81, and the sealing plate 12 is pressed against the outside of the wear-resistant plate 8, so as to fix the wear-resistant plate 8 relative to the base frame 1. The wear-resistant plate 8 is made of copper plate, and the wear-resistant plate 8 is pressed on the side surfaces of the upper and lower ends of the outer slider 41 and the inner slider 42, providing stable sliding support for the outer slider 41 and the inner slider 42.

[0030] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An engine cylinder transfer gripper, comprising a base frame (1); It is characterized in that Also includes: An upper rotating shaft (2) is rotatably mounted on the base frame (1); both ends of the upper rotating shaft (2) are respectively provided with upper threaded sections (21) in opposite directions, and the middle portion of the upper rotating shaft (2) is an optical axis; The lower rotating shaft (3) is arranged parallel to the lower side of the upper rotating shaft (2) and is rotatably mounted on the base frame (1); two opposite lower threaded sections (31) are provided in the middle of the lower rotating shaft (3), and both ends of the lower rotating shaft (3) are optical axes; A left clamping jaw assembly (4) mounted on the left ends of the upper rotating shaft (2) and the lower rotating shaft (3); A right clamping jaw assembly (5) is mounted on the right ends of the upper rotating shaft (2) and the lower rotating shaft (3); the right clamping jaw assembly (5) is symmetrical with the left clamping jaw assembly (4); Wherein, the left clamping jaw assembly (4) comprises: An outer sliding block (41) is slidably mounted on the optical axis at the left end of the lower rotating shaft (3) and is meshedly connected with the upper threaded section (21) at the left end of the upper rotating shaft (2); An inner sliding block (42) is slidably mounted on the optical axis on the left side of the middle portion of the upper rotating shaft (2), and is meshingly connected with the lower threaded section (31) on the left side of the middle portion of the lower rotating shaft (3); An outer support rod (43) is fixed to the lower end of the outer sliding block (41); the lower end of the outer support rod (43) is biased toward the inner sliding block (42); An inner support rod (44) is fixed to the lower end of the inner slide block (42); the lower end of the inner support rod (44) is biased toward the outer slide block (41); The left clamping jaw (45) has one end hinged to the lower end of the outer support rod (43) and the other end is provided with a long hole (451); a sliding pin (441) slidingly inserted in the long hole (451) is fixed to the lower end of the inner support rod (44), and the position of the sliding pin (441) is lower than the hinge point between the outer support rod (43) and the left clamping jaw (45).

2. The engine cylinder transfer gripper according to claim 1, characterized in that: A bayonet (452) is provided at the left end of the left clamping jaw (45); The left pad (46) is mounted in the bayonet (452) and fixedly connected to the left clamp (45) by bolts; the end of the left pad (46) away from the left clamp (45) has two symmetrical protrusions (461), and the end of the protrusion (461) away from the left clamp (45) is arc-shaped.

3. The engine cylinder transfer gripper according to claim 1, characterized in that: The outer support rod (43) and the inner support rod (44) are both L-shaped, and the lower ends of the outer support rod (43) and the inner support rod (44) are both provided with connecting ear plates.

4. The engine cylinder transfer gripper according to claim 1, characterized in that: The upper end of the base frame (1) is provided with a plurality of threaded holes, the lower end of the base frame (1) is provided with a U-shaped opening (11), and the two ends of the upper rotating shaft (2) and the lower rotating shaft (3) are rotatably mounted on two side walls of the U-shaped opening (11) via bearings.

5. The engine cylinder transfer gripper according to claim 4, characterized in that: The left end of the upper rotating shaft (2) is connected to a left driving motor (6), which is fixed to the left side wall of the U-shaped opening (11); the right end of the lower rotating shaft (3) is connected to a right driving motor (7), which is fixed to the right side wall of the U-shaped opening (11).

6. The engine cylinder transfer gripper according to claim 4, characterized in that: A T-shaped middle support plate (13) fixed to the base frame (1) is arranged in the middle of the U-shaped opening (11); the middle parts of the upper rotating shaft (2) and the lower rotating shaft (3) respectively pass through the middle support plate (13) and are rotatably connected to the middle support plate (13) via bearings.

7. The engine cylinder transfer gripper according to claim 6, characterized in that: Sealing plates (12) covering the sides of the U-shaped opening (11) are respectively fixed on both sides of the base frame (1).

8. The engine cylinder transfer gripper according to claim 7, characterized in that: A pair of wear-resistant plates (8) are respectively arranged on both sides of the left clamping jaw assembly (4) and the right clamping jaw assembly (5); both side edges of the middle support plate (13) and the two side walls of the U-shaped opening (11) are provided with slots (81) matching with the wear-resistant plates (8); both ends and the middle of the wear-resistant plates (8) are respectively embedded in the corresponding slots (81); the sealing plate (12) is pressed on the outer side of the wear-resistant plate (8), and the inner side of the wear-resistant plate (8) is pressed on the surface of the outer slider (41) and the inner slider (42) in the left clamping jaw assembly (4) and the right clamping jaw assembly (5).

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