Combined positioning and clamping device

Abstract

The utility model belongs to the technical field of axle housing positioning, and particularly relates to a combined positioning and clamping device. A floating mechanism in the device is provided with a spring in the vertical direction, the floating mechanism drives a large flange face of the rear axle housing to float up and down under the elastic action of the spring, and the left end and the right end of a piston rod of an air cylinder in a tight supporting mechanism are movably connected with tight supporting rods through connecting rods correspondingly. The ends, far away from each other, of the two tight supporting rods are detachably connected with tight supporting blocks through bolts, the tight supporting rods are located above the floating mechanism, a piston rod of the air cylinder drives the two tight supporting rods to move in the horizontal direction through up-down stretching and retracting, and positioning tight supporting of a lute hole of the rear axle housing is achieved. The device is simple in structure and small in occupied space, can automatically conduct self-centering tight supporting on the rear axle housing, eliminates errors in the height direction, and solves the problems that when an existing positioning device conducts positioning on the rear axle housing through a multi-step positioning disc, time and labor are wasted, positioning is not accurate, and a large flange face cannot be leveled.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge housing positioning, and particularly relates to a combined positioning clamping device. Background Art

[0002] Processes such as spot welding accessories of the bridge housing require determining the center position of the lute hole and positioning the end face of the lute hole. Traditional positioning devices are mainly fixed clamps, which have complex structures, occupy a large space, cannot eliminate the positioning errors of components, and are mainly operated manually, which is labor-intensive and inefficient.

[0003] At present, most of the existing positioning devices are fixed multi-step positioning discs determined according to different lute hole diameters, which clamp the rear axle housing on the corresponding disc. When the existing positioning device operates on different rear axle housings, it is necessary to replace the multi-step positioning disc, which is time-consuming and labor-intensive, and it is difficult to ensure the symmetry of the two sides of the rear axle housing. The existing positioning device only uses a multi-step positioning disc for rough positioning, without a tightening device or a floating device. The absence of a tightening device will cause a gap between the positioning disc and the large flange of the rear axle housing. If this gap is too large, the rear axle housing will not be accurately positioned, affecting the processing quality; if this gap is too small, the rear axle housing will not be easily placed accurately on the corresponding disc, affecting the beat. Without a floating device, it is impossible to cooperate with the clamping devices on both sides of the rear axle housing, it is impossible to level the large flange surface, and it is impossible to ensure the height of the machining center. Utility Model Content

[0004] The utility model proposes a combined positioning clamping device, which has a simple structure and occupies a small space. It can automatically perform self-centering and tightening on the rear axle housing and eliminate errors in the height direction, thereby solving the problems of the existing positioning device being time-consuming and labor-intensive, inaccurately positioned, and unable to level the large flange surface when positioning the rear axle housing through a multi-step positioning disc.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A combined positioning and clamping device comprises a tightening mechanism and a floating mechanism, wherein the tightening mechanism is located in the middle of the floating mechanism, and the floating mechanism is provided with a spring in the vertical direction, and the floating mechanism drives the large flange surface of the rear axle housing to float up and down under the elastic action of the spring; the tightening mechanism comprises a cylinder, a tightening rod and a tightening block, the piston rod of the cylinder is vertically upward, and the left and right ends of the cylinder piston rod are symmetrically and movably connected to the tightening rods through connecting rods, and the ends of the two tightening rods away from each other are detachably connected to the tightening block through bolts, and the tightening rod is located above the floating mechanism, and the piston rod of the cylinder drives the two tightening rods to move in the horizontal direction by extending and retracting up and down, so as to realize the positioning and tightening of the lute hole of the rear axle housing.

[0007] Through the above technical solution, the floating mechanism uses the elastic force of the spring to drive the large flange surface of the rear axle housing to float up and down, thereby leveling the large flange surface of the rear axle housing and ensuring the height of the machining center. The tensioning mechanism can realize the back and forth movement of the two tensioning rods in the horizontal direction only by the upward and downward extension of the piston rod of the cylinder, so as to position and tighten the pipa hole of the rear axle housing. The connecting rod drives the tensioning rods at both ends to move synchronously, so that the two tensioning rods can be tightened and loosened at the same time. The two connecting rods and the two tensioning rods are symmetrical parts to realize the self-centering function. The end of the tensioning rod is detachably connected with a tensioning block by bolts. By replacing tensioning blocks of different sizes, the tensioning rod can be used to position and tighten rear axle housings of different models. After the rear axle housing exceeds the self-centering positioning and tightening range of the tensioning rod, the self-centering range can be expanded by replacing the tensioning block to improve the tightening coverage range.

[0008] Optionally, the bracing mechanism further includes a fixing frame, and the cylinder body of the cylinder is vertically inserted into the fixing frame.

[0009] Through the above technical solution, the fixing frame can limit and fix the cylinder, so that the piston rod of the cylinder can always move in the vertical direction during the extension and retraction process, thereby improving the stability of the piston rod of the cylinder during the extension and retraction process.

[0010] Optionally, the end of the piston rod of the cylinder is fixedly connected to a guide column, and the two ends of the connecting rod are movably connected to the side of the guide column and the end of the tightening rod through a pin shaft respectively, and a guide cylinder is fixed to the outer side of the tightening rod, and the guide cylinder is T-shaped, and the length of the guide cylinder is smaller than the length of the tightening rod.

[0011] Through the above technical solution, the guide column can improve the firmness and stability of the connection between the piston rod and the connecting rod of the cylinder, and can also improve the telescopic range of the piston rod of the cylinder. The guide cylinder can provide guidance for the tension rod to ensure that the moving direction of the tension rod is accurate.

[0012] Optionally, the floating mechanism includes a support frame, a guide sleeve and a guide column, a plurality of guide sleeves are circumferentially arranged at the bottom of the support frame, the guide column is slidably connected inside the upper end of the guide sleeve, the upper end of the guide column is fixedly connected to the bottom of the support frame, the lower end of the guide column is inserted into the guide sleeve, a spring is installed inside the guide sleeve, the spring is located below the guide column, the upper end of the spring is in contact with the lower end of the guide column, and the guide column drives the support frame to move up and down under the elastic action of the spring.

[0013] Through the above technical solution, the support frame can support the rear axle housing, and the guide column and the spring can cooperate to drive the support frame to move up and down, so that the support frame drives the rear axle housing to move up and down, which is beneficial to the automatic leveling of the large flange surface of the rear axle housing. The spring is located inside the guide sleeve, which reduces the occurrence of accidents such as squeezing injuries to people during the compression process of the spring.

[0014] Optionally, the support frame is rectangular, and a plurality of support blocks are respectively provided at the left and right ends of the support frame, and the support blocks are U-shaped, and the heights of the two ends of the U-shaped support blocks are unequal.

[0015] Through the above technical solution, the support block can support the bridge shell, and the heights of the two ends of the U-shape of the support block are not equal, so that the two ends of the U-shape of the support block can be compatible with supporting two different models of bridge shells.

[0016] Optionally, a fixed limit pad is provided on the outer side of the guide column, the limit pad is located outside the guide sleeve, the cross-sectional area of ​​the limit pad is greater than or equal to the cross-sectional area of ​​the guide sleeve, the lower end of the guide sleeve is fixedly connected with a fixed pad, the cross-sectional area of ​​the fixed pad is greater than the cross-sectional area of ​​the guide sleeve, and the lower end of the spring is in contact with the fixed pad.

[0017] Through the above technical solution, the limiting pad can limit the guide column, thereby improving the stability of the guide column moving along the guide sleeve, and the fixing pad can contact and limit the spring.

[0018] Optionally, a limiting groove is provided at the lower end of the guide column, and the diameter of the limiting groove matches the diameter of the spring.

[0019] Through the above technical solution, the limit groove can limit and fix the spring, so that the spring always maintains expansion and contraction in the vertical direction, which is conducive to the spring driving the support frame to float up and down under the elastic action, and helps the large flange surface of the rear axle housing to automatically level.

[0020] Optionally, the tightening mechanism further includes a tightening box, the piston rod of the cylinder, the tightening rod and the connecting rod are located inside the tightening box, the tightening block is located outside the tightening box, and the tightening rod passes through the tightening box to drive the tightening block to move in a horizontal direction.

[0021] Through the above technical solution, the tightening box can protect the piston rod, tightening rod and connecting rod of the cylinder, and can also prevent dust and impurities from entering the cylinder, tightening rod and other components to cause jamming.

[0022] After adopting the above technical solution, the beneficial effects of the utility model are:

[0023] The present invention uses a cylinder to drive a hinged mechanism. Under the guidance of two symmetrically arranged guide cylinders, two tensioning rods are simultaneously tensioned at both ends, thereby realizing self-centering positioning and tensioning of the rear axle housing. The height direction is guided by a spring and four guide pillars to achieve overall floating. The matching of the cylinder, the connecting rod and the tensioning rod improves the convenience and efficiency of operation. The device in the present invention has a simple overall structure and strong practicality. It can efficiently position and clamp rear axle housings of different models, realize automatic positioning and tensioning of the rear axle housing, automatically level the large flange surface of the rear axle housing by floating up and down, and automatically eliminate the errors of parts. The operation is convenient and fast, and the safety and efficiency are high. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 The structure of the whole device in the embodiment is shown in FIG. Figure Ⅰ ;

[0026] Figure 2 The structure of the whole device in the embodiment is shown in FIG. Figure II (remove the tension box);

[0027] Figure 3 The structure of the whole device in the embodiment is shown in FIG. Figure III (remove the tension box and a guide sleeve);

[0028] Figure 4 The structure of the whole device in the embodiment is shown in FIG. Figure IV (remove the tension box, a spring and two guide sleeves);

[0029] Figure 5 This is a schematic diagram of the structure of the entire device and the rear axle housing in the embodiment. Figure Ⅰ ;

[0030] Figure 6 This is a schematic diagram of the structure of the entire device and the rear axle housing in the embodiment. Figure II .

[0031] Explanation of the accompanying reference numerals: 1. Cylinder; 2. Tightening rod; 3. Tightening block; 4. Connecting rod; 5. Guide column; 6. Fixed frame; 7. Guide cylinder; 8. Support frame; 9. Guide sleeve; 10. Guide column; 11. Spring; 12. Support block; 13. Limiting pad; 14. Fixed pad; 15. Limiting groove; 16. Tightening box; 17. Rear axle housing. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0033] The embodiment of the present application discloses a combined positioning and clamping device.

[0034] Example

[0035] according to Figures 1 to 6 As shown, a combined positioning clamping device includes a clamping mechanism and a floating mechanism. The clamping mechanism is located in the middle of the floating mechanism. The floating mechanism is provided with a spring 11 along the vertical direction. The floating mechanism drives the large flange surface of the rear axle housing 17 to float up and down under the elastic action of the spring 11.

[0036] The tightening mechanism includes a tightening box 16, a fixing frame 6, a cylinder 1, a tightening rod 2 and a tightening block 3. The cylinder body of the cylinder 1 is vertically inserted into the fixing frame 6, and the piston rod of the cylinder 1 is vertically upward. The end of the piston rod of the cylinder 1 is fixedly connected with a guide column 5, and the left and right ends of the guide column 5 are symmetrically and movably connected with the tightening rod 2 through a connecting rod 4. The left and right ends of the guide column 5 are symmetrically and movably connected with the connecting rod 4. The two ends of the connecting rod 4 are movably connected with the side of the guide column 5 and the end of the tightening rod 2 through a pin shaft. A guide cylinder 7 is fixed on the outer side of the tightening rod 2. The guide cylinder 7 is T-shaped, and the length of the guide cylinder 7 is less than the tightening The length of the rod 2, the ends of the two tightening rods 2 that are away from each other are detachably connected with a tightening block 3 by bolts, the tightening rod 2 is located above the floating mechanism, the piston rod of the cylinder 1, the tightening rod 2, the tightening block 3, the connecting rod 4, the guide column 5 and the guide cylinder 7 are all located inside the tightening box 16, and the tightening block 3 is located outside the tightening box 16. The piston rod of the cylinder 1 drives the two tightening rods 2 to move in the horizontal direction by telescoping up and down. The two tightening rods 2 pass through the tightening box 16 during the movement, driving the tightening block 3 to tighten or loosen the pipa hole of the rear axle housing 17 at the same time, thereby realizing the positioning and tightening of the pipa hole of the rear axle housing 17.

[0037] The floating mechanism includes a support frame 8, a guide sleeve 9, a guide column 10 and a spring 11. The fixing frame 6 and the cylinder 1 are located at the inner center of the support frame 8. The tightening rod 2 is located above the support frame 8. The support frame 8 is rectangular. A plurality of support blocks 12 are respectively arranged at the left and right ends of the support frame 8. The support blocks 12 are U-shaped, and the heights of the two ends of the U-shaped support blocks 12 are not equal. The support blocks 12 are used to clamp and support the rear axle housing 17. The four corners of the bottom of the support frame 8 are provided with guide sleeves 9, with a total of four guide sleeves 9. A guide post 10 is slidably connected inside the upper end of the guide sleeve 9. The upper end of the guide post 10 is fixedly connected to the bottom of the support frame 8. The lower end of the guide post 10 is inserted into the guide sleeve 9. A spring 11 is installed inside the guide sleeve 9. The spring 11 is located below the guide post 10. A limiting groove 15 is provided at the lower end of the guide post 10. The diameter of the limiting groove 15 matches the diameter of the spring 11. The upper end of the spring 11 contacts the limiting groove 15. The guide post 10 drives the support frame 8 to move up and down under the elastic action of the spring 11. A fixed limiting pad 13 is sleeved on the outer side of the guide post 10. The limiting pad 13 is located outside the guide sleeve 9. The cross-sectional area of ​​the limiting pad 13 is greater than or equal to the cross-sectional area of ​​the guide sleeve 9. A fixed pad 14 is fixedly connected to the lower end of the guide sleeve 9. The cross-sectional area of ​​the fixed pad 14 is greater than the cross-sectional area of ​​the guide sleeve 9. The lower end of the spring 11 contacts the fixed pad 14.

[0038] The present invention uses a cylinder 1 to push a hinge mechanism, and two tension rods 2 are guided by two symmetrically arranged guide cylinders 7 to achieve synchronous tension at both ends, thereby achieving self-centering positioning tension of the rear axle housing 17. The height direction is guided by a spring 11 and four guide pillars 10 to achieve overall floating. The matching of the cylinder 1, the connecting rod 4, and the tension rod 2 improves the convenience and efficiency of operation. The device of the present invention has a simple structure as a whole and strong practicality. It can efficiently position and clamp rear axle housings 17 of different models, achieve automatic positioning and tension of the rear axle housing 17, automatically level the large flange surface of the rear axle housing 17 by floating up and down, and automatically eliminate the errors of parts. The operation is convenient and fast, and the safety and efficiency are high.

[0039] The floating mechanism uses the elastic force of the spring 11 to drive the large flange surface of the rear axle housing 17 to float up and down, thereby leveling the large flange surface of the rear axle housing 17 and ensuring the height of the machining center. The tensioning mechanism can realize the back and forth movement of the two tensioning rods 2 in the horizontal direction only by the piston rod of the cylinder 1 extending and retracting in the up and down direction, so as to position and tighten the pipa hole of the rear axle housing 17. The connecting rod 4 drives the tensioning rods 2 at both ends to move synchronously, so as to realize the simultaneous tightening and loosening of the two tensioning rods 2. The two connecting rods 4 and the two tensioning rods 2 are symmetrical parts, realizing the self-centering function. The end of the tensioning rod 2 is detachably connected with a tensioning block 3 by bolts. By replacing the tensioning blocks 3 of different sizes, the tensioning rod 2 can be positioned and tightened for different models of rear axle housings 17. After the rear axle housing 17 exceeds the self-centering positioning and tightening range of the tensioning rod 2, the self-centering range can be expanded by replacing the tensioning block 3, thereby improving the tightening coverage range.

[0040] The fixing frame 6 can limit and fix the cylinder 1, so that the piston rod of the cylinder 1 can always move in the vertical direction during the extension and retraction process, thereby improving the stability of the piston rod of the cylinder 1 during the extension and retraction process. The guide column 5 can improve the firmness and stability of the connection between the piston rod of the cylinder 1 and the connecting rod 4, and can also improve the extension and retraction range of the piston rod of the cylinder 1. The support frame 8 can support the rear axle housing 17, and the guide column 10 and the spring 11 can cooperate to drive the support frame 8 to move up and down, so that the support frame 8 drives the rear axle housing 17 to move up and down, which is conducive to the automatic leveling of the large flange surface of the rear axle housing 17. The spring 11 is located inside the guide sleeve 9, which reduces the occurrence of accidents such as squeezing injuries to people during the compression process of the spring 11. The limiting pad 13 can limit the guide column 10, improve the stability of the guide column 10 moving along the guide sleeve 9, and the fixing pad 14 can contact and limit the spring 11. The limiting groove 15 can limit and fix the spring 11, so that the spring 11 always maintains expansion and contraction in the vertical direction, which is beneficial for the spring 11 to drive the support frame 8 to float up and down under the elastic action, and helps the large flange surface of the rear axle housing 17 to automatically level.

[0041] Working principle:

[0042] The large flange surface of the rear axle housing 17 is vertically facing downward, hoisted above the tightening mechanism, and gradually moved downward, so that the lute hole of the rear axle housing 17 moves downward to above the guide column 5. The guide column 5 is located at the center of the lute hole of the rear axle housing 17. The rear axle housing 17 gradually moves downward until the support block 12 contacts and clamps the rear axle housing 17. After receiving the pressure of the rear axle housing 17, the support frame 8 moves downward, the guide column 10 moves downward synchronously, and the spring 11 is compressed. Under the elastic action of the spring 11, the support frame 8 drives the support block 12 to move up and down, so that The entire rear axle housing 17 floats up and down until the large flange end face of the rear axle housing 17 is flush with the horizontal direction, and the cylinder 1 is started. The piston rod of the cylinder 1 drives the guide column 5 to move up and down through extension and contraction, and the guide column 5 moves upward. The guide column 5 drives the two tightening rods 2 to extend outward in the horizontal direction at the same time through the connecting rod 4. The tightening rod 2 drives the tightening block 3 to tighten the lute hole of the rear axle housing 17 under the guidance of the guide cylinder 7, thereby realizing the self-centering tightening and fixing of the rear axle housing 17. According to the diameter of the lute hole of different models of rear axle housing 17, the tightening blocks 3 of different sizes can be selected and replaced.

[0043] In the description of the present utility model, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A combined positioning and clamping device, characterized in that: It comprises a tightening mechanism and a floating mechanism, wherein the tightening mechanism is located in the middle of the floating mechanism, the floating mechanism is provided with a spring (11) in the vertical direction, and the floating mechanism drives the large flange surface of the rear axle housing to float up and down under the elastic action of the spring (11); The tightening mechanism comprises a cylinder (1), a tightening rod (2) and a tightening block (3). The piston rod of the cylinder (1) is vertically upwards. The left and right ends of the piston rod of the cylinder (1) are symmetrically and movably connected to the tightening rods (2) through connecting rods (4). The ends of the two tightening rods (2) that are away from each other are detachably connected to the tightening block (3) through bolts. The tightening rod (2) is located above the floating mechanism. The piston rod of the cylinder (1) drives the two tightening rods (2) to move in the horizontal direction by extending and retracting up and down, so as to achieve positioning and tightening of the lute hole of the rear axle housing.

2. A combined positioning and clamping device according to claim 1, characterized in that: The bracing mechanism also includes a fixing frame (6), and the cylinder body of the cylinder (1) is vertically inserted into the fixing frame (6).

3. A combined positioning and clamping device according to claim 1, characterized in that: The piston rod end of the cylinder (1) is fixedly connected to a guide column (5), and the two ends of the connecting rod (4) are movably connected to the side surface of the guide column (5) and the end of the tension rod (2) through a pin shaft, respectively. A guide cylinder (7) is sleeved and fixed on the outer side of the tension rod (2), and the guide cylinder (7) is T-shaped. The length of the guide cylinder (7) is less than the length of the tension rod (2).

4. A combined positioning and clamping device according to claim 1, characterized in that: The floating mechanism comprises a support frame (8), a guide sleeve (9) and a guide column (10). The bottom of the support frame (8) is provided with a plurality of guide sleeves (9) along the circumferential direction. The upper end of the guide sleeve (9) is slidably connected with the guide column (10). The upper end of the guide column (10) is fixedly connected to the bottom of the support frame (8). The lower end of the guide column (10) is inserted into the guide sleeve (9). A spring (11) is installed inside the guide sleeve (9). The spring (11) is located below the guide column (10). The upper end of the spring (11) contacts the lower end of the guide column (10). The guide column (10) drives the support frame (8) to move up and down under the elastic action of the spring (11).

5. A combined positioning and clamping device according to claim 4, characterized in that: The support frame (8) is rectangular, and a plurality of support blocks (12) are respectively arranged at the left and right ends of the support frame (8), and the support blocks (12) are U-shaped, with the heights of the two ends of the U-shape of the support blocks (12) being unequal.

6. A combined positioning and clamping device according to claim 4, characterized in that: A limit pad (13) is fixedly sleeved on the outer side of the guide column (10), the limit pad (13) is located outside the guide sleeve (9), the cross-sectional area of ​​the limit pad (13) is greater than or equal to the cross-sectional area of ​​the guide sleeve (9), the lower end of the guide sleeve (9) is fixedly connected with a fixed pad (14), the cross-sectional area of ​​the fixed pad (14) is greater than the cross-sectional area of ​​the guide sleeve (9), and the lower end of the spring (11) is in contact with the fixed pad (14).

7. A combined positioning and clamping device according to claim 4, characterized in that: A limiting groove (15) is provided at the lower end of the guide column (10), and the diameter of the limiting groove (15) matches the diameter of the spring (11).

8. The combined positioning and clamping device according to claim 1, characterized in that: The tightening mechanism also includes a tightening box (16), the piston rod of the cylinder (1), the tightening rod (2) and the connecting rod (4) are located inside the tightening box (16), the tightening block (3) is located outside the tightening box (16), and the tightening rod (2) passes through the tightening box (16) to drive the tightening block (3) to move in a horizontal direction.

Images