Forward moving vehicle door frame with descending buffering device

Abstract

The utility model relates to a forward moving vehicle door frame with a descending buffering device. The technical problems that when an existing portal frame descends to the terminal point, large impact causes goods shaking, and the portal frame structure is damaged are solved. Comprising a door frame body, the door frame body is provided with an outer door frame, a middle door frame and an inner door frame, a door frame side cylinder is arranged between the outer door frame and the middle door frame and comprises a side cylinder body with an oil injection part, a piston rod is movably arranged in the side cylinder body, a piston part is arranged at one end of the piston rod, a valve assembly is arranged on the inner side of the piston part, and a buffer mounting groove is formed in one end of the piston part. A buffering sleeve is arranged in the buffering mounting groove, a buffering piece is arranged on the circumferential inner side of the buffering sleeve, and a concave-convex elastic buffering structure is arranged on the inner side of one end of the side cylinder body. The oil cylinder has the advantages that the buffering piece is installed on the piston part, the buffering piece and the buffering groove are matched with each other, the buffering effect is achieved when the piston rod descends, impact on the oil cylinder and the door frame structure when the door frame body descends in place is reduced, and deformation and damage of parts caused by too large instant impact force are avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the oil cylinder equipment technical field, concretely relates to a front moving car door frame with descending buffer device. BACKGROUND

[0002] With the rapid development of logistics industry, material handling equipment such as forklift is widely used. Front moving forklift plays an important role in space limited places such as narrow passageway with its unique structure and operation advantage. The mast system of forklift is the key component to realize the lifting and carrying of goods, and the buffer control in the descending process of mast is crucial, and in the prior art, the buffer device of mast descending can only provide fixed buffer force, and cannot provide sufficient buffer force according to the actual conditions such as descending speed and load of mast, resulting in that the mast still has a larger impact when descending to the terminal point, which may cause the risk of goods shaking and falling, and also cause the damage of mast structure. SUMMARY

[0003] The utility model aims at the above -mentioned problem, provides a front moving car door frame with descending buffer device.

[0004] In order to achieve the above object, the utility model adopts the following technical scheme: a front moving car door frame with descending buffer device, including door frame body, the door frame body has outer door frame, middle door frame and inner door frame, the outer door frame and middle door frame are equipped with door frame edge cylinder, the door frame edge cylinder includes the edge cylinder body with injection oil part, the piston rod is movably arranged in the edge cylinder body, one end of the piston rod is equipped with the piston part, the inner side of the piston part is equipped with valve assembly, the end of the piston part away from valve assembly is equipped with buffer installation groove, the buffer installation groove is equipped with buffer sleeve, the buffer sleeve circumferential inner side is equipped with the buffer piece with one end axially protruding from the outer side of the piston part, and the inner side of the edge cylinder body near the piston part one end is equipped with the concave-convex elastic buffer structure corresponding with the buffer piece. Through the concave-convex elastic buffer structure and buffer piece, when the piston rod is lowered in place, the concave-convex fitting extrusion is realized to achieve the buffer effect, so that the safety accident caused by the excessive speed and impact force of piston rod descending can be avoided, and the service life of equipment can also be prolonged.

[0005] In the above-mentioned front moving car door frame with descending buffer device, the inner side of the one end of the piston rod near the piston part is equipped with the piston connecting groove, the one end of the piston part is equipped with the rod body connecting part, the rod body connecting part is arranged in the piston connecting groove, and the buffer installation groove is arranged in the inner side of the one end of the piston part away from the rod body connecting part.

[0006] In the above-mentioned front-moving vehicle door frame with a descending buffer device, the outer side of the rod body connecting part is provided with a steel wire stop ring in contact with the piston rod, the valve assembly is arranged at one end of the buffer mounting groove, and the outer side of the valve assembly is provided with a valve sealing ring in contact with the inner side of the piston part.

[0007] In the above-mentioned front-moving vehicle door frame with a descending buffer device, the concave-convex type elastic buffer structure includes a buffer groove arranged at the inner side of the side cylinder body near the oil injection part, the buffer part is movably inserted into the buffer groove away from the valve assembly, the outer side of the buffer sleeve away from the valve assembly is provided with a hole steel wire stop ring, and the inner side of the valve assembly is provided with an elastic buffer assembly corresponding to the buffer sleeve. The buffer groove and the buffer part are designed in a concave-convex matching structure to achieve the buffer effect through extrusion.

[0008] In the above-mentioned front-moving vehicle door frame with a descending buffer device, the elastic buffer assembly includes a gasket arranged between the valve assembly and the buffer sleeve, the inner side of the valve assembly is provided with a valve rod, the inner side of the valve assembly near the gasket is provided with a fixed plate, the valve rod is axially penetrated through the fixed plate to the inner side of the gasket near the gasket, and the valve rod and the fixed plate are provided with a buffer spring therebetween. The valve rod and the gasket have a certain buffer effect on the buffer part under the action of the buffer spring.

[0009] In the above-mentioned front-moving vehicle door frame with a descending buffer device, the diameter of the gasket is equal to the diameter of the buffer sleeve, and the length of the buffer part is greater than the length of the buffer sleeve.

[0010] In the above-mentioned front-moving vehicle door frame with a descending buffer device, the outer side of the piston part is provided with a piston stop ring, one side of the piston stop ring is provided with a hole sealing ring, the side of the hole sealing ring away from the piston stop ring is provided with a piston support ring, and the piston stop ring, the hole sealing ring, and the piston support ring are all in contact with the side cylinder body.

[0011] In the above-mentioned front-moving vehicle door frame with a descending buffer device, the side cylinder body is provided with a guide sleeve between the side cylinder body and the piston rod away from the oil injection part, the dustproof ring is arranged on the side of the guide sleeve near the piston rod, the first sealing ring is arranged on one side of the dustproof ring, the steel-backed bearing is arranged on the side of the first sealing ring away from the dustproof ring, and the dustproof ring, the first sealing ring, and the steel-backed bearing are all in contact with the piston rod.

[0012] In the front moving gantry with the falling buffering device, the piston rod is sleeved with an adjusting sleeve, and the adjusting sleeve is located between the guide sleeve and the piston part.

[0013] In the front moving gantry with the falling buffering device, the side cylinder cylinder body is connected with the outer gantry at one end close to the oil injection part, and the piston rod is connected with the middle gantry at one end away from the side cylinder cylinder body.

[0014] Compared with the prior art, the front moving gantry has the advantages that:

[0015] 1. The device is installed with a buffer on the piston part, and the buffer and the buffer groove are matched with each other to buffer when the piston rod falls, reduce the impact of the gantry body on the oil cylinder and the gantry structure when falling in place, avoid deformation and damage of components caused by too large instantaneous impact force, and prolong the service life.

[0016] 2. The device uses the concave-convex elastic buffering structure and the buffer to make the gantry body fall more stably, avoid unstable speed, ensure operation safety, reduce vibration and noise generated when the gantry body falls, and improve the comfort of equipment operation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural section view of the utility model.

[0018] Figure 2 is a structural section view of the utility model. Figure 1 is an enlarged view of structure at A in the utility model.

[0019] Figure 3 is a structural section view of the side cylinder cylinder body in the utility model.

[0020] Figure 4 is a structural section view of the piston part in the utility model.

[0021] In the drawing: gantry side cylinder 1, side cylinder cylinder body 2, oil injection part 21, piston rod 3, piston connecting groove 31, piston part 4, buffer mounting groove 41, buffer sleeve 42, buffer 43, rod body connecting part 44, steel wire retaining ring 45, piston retaining ring 46, hole sealing ring 47, piston support ring 48, valve assembly 5, valve sealing ring 51, valve rod 52, fixed plate 53, buffer spring 54, concave-convex elastic buffering structure 6, buffer groove 61, hole steel wire retaining ring 62, elastic buffering assembly 7, gasket 71, guide sleeve 8, dustproof ring 81, first sealing ring 82, steel-backed bearing 83, adjusting sleeve 9. DETAILED DESCRIPTION

[0022] The utility model will be made further detailed explanation in combination with the drawings and specific embodiment.

[0023] As Figures 1-4 shown, a front moving door frame with falling buffer device, including door frame body, door frame body has outer door frame, middle door frame and inner door frame, is equipped with door frame edge cylinder 1 between outer door frame and middle door frame, door frame edge cylinder 1 includes the cylinder body 2 with oil injection part 21, the piston rod 3 is movably arranged in the cylinder body 2, the piston rod 3 one end is equipped with the piston part 4, the piston part 4 inner side is equipped with valve assembly 5, the piston part 4 is equipped with the buffer installation groove 41 at the end away from valve assembly 5, the buffer installation groove 41 is equipped with buffer sleeve 42, the buffer sleeve 42 circumferential inner side is equipped with the buffer piece 43 with one end axial protruding on the outer side of piston part 4, and the cylinder body 2 is equipped with the concave-convex type elastic buffer structure 6 corresponding with buffer piece 43 at the inner side of one end close to piston part 4. Through concave-convex type elastic buffer structure 6 and buffer piece 43, when the piston rod 3 falls in place, realize concave-convex fit extrusion to reach buffer effect, so can avoid the safety accident caused by the piston rod 3 falling speed too fast, impact force is too big, can also prolong the service life of equipment.

[0024] As Figure 1 and Figure 4 shown, the piston rod 3 is equipped with piston connecting groove 31 at the inner side of one end close to piston part 4, the piston part 4 one end is equipped with rod body connecting part 44, the rod body connecting part 44 is arranged in the piston connecting groove 31, and the buffer installation groove 41 is arranged at the inner side of one end of piston part 4 away from rod body connecting part 44.

[0025] Wherein, the rod body connecting part 44 circumferential outer side is equipped with steel wire retaining ring 45 in contact with piston rod 3, valve assembly 5 is arranged at one end of buffer installation groove 41, valve assembly 5 circumferential outer side is equipped with valve seal ring 51 in contact with the inner side of piston part 4. The piston part 4 is connected with the piston connecting part 31 of piston rod 3 through rod body connecting part 44, the piston part 4 and piston rod 3 are fixed through steel wire retaining ring 45, which plays the role of axial positioning, and also plays a certain sealing effect.

[0026] As Figure 2 and Figure 3 shown, the concave-convex type elastic buffer structure 6 includes buffer groove 61 arranged at the inner side of one end of cylinder body 2 close to oil injection part 21, the buffer piece 43 is movably inserted into the buffer groove 61 at the end away from valve assembly 5, the buffer sleeve 42 circumferential outer side is equipped with hole steel wire retaining ring 62 at the end away from valve assembly 5, and the inner side of valve assembly 5 is equipped with elastic buffer assembly 7 corresponding with buffer sleeve 42. The structure design of buffer groove 61 and buffer piece 43 realizes the buffer effect through concave-convex fit extrusion.

[0027] The elastic buffer assembly 7 includes a gasket 71 disposed between the valve assembly 5 and the buffer sleeve 42. A valve stem 52 is located inside the valve assembly 5. A fixing plate 53 is located on the inner side of the valve assembly 5 near the gasket 71. The valve stem 52 axially penetrates the fixing plate 53 to the inner side of the gasket 71 at the end near the gasket 71, and a buffer spring 54 is disposed between the valve stem 52 and the fixing plate 53. The valve stem 52 and the gasket 71, under the action of the buffer spring 54, provide a certain buffering effect on the buffer member 43.

[0028] Specifically, the diameter of the gasket 71 is equal to the diameter of the buffer sleeve 42, and the length of the buffer element 43 is greater than the length of the buffer sleeve 42.

[0029] Furthermore, a piston retaining ring 46 is provided on the outer side of the piston part 4, a hole sealing ring 47 is provided on one side of the piston retaining ring 46, and a piston support ring 48 is provided on the side of the hole sealing ring 47 away from the piston retaining ring 46. The piston retaining ring 46, the hole sealing ring 47 and the piston support ring 48 are all in contact with the side cylinder body 2.

[0030] like Figure 1 As shown, a guide sleeve 8 is provided at the end of the side cylinder body 2 away from the oil injection part 21, located between the side cylinder body 2 and the piston rod 3. A dustproof ring 81 is provided on the side of the guide sleeve 8 near the piston rod 3. A first sealing ring 82 is provided on the side of the dustproof ring 81. A steel back bearing 83 is provided on the side of the first sealing ring 82 away from the dustproof ring 81. The dustproof ring 81, the first sealing ring 82 and the steel back bearing 83 are all in contact with the piston rod 3.

[0031] The piston rod 3 is fitted with an adjusting sleeve 9 on its outer side, and the adjusting sleeve 9 is located between the guide sleeve 8 and the piston part 4. The adjusting sleeve 9 is used to help the piston rod 3 and the piston part 4 to be accurately positioned and aligned, ensuring their coaxiality within the side cylinder body 2, making the movement of the components smoother, and reducing wear and leakage caused by misalignment.

[0032] Specifically, the end of the side cylinder body 2 near the oil filling part 21 is connected to the outer mast, and the end of the piston rod 3 away from the side cylinder body 2 is connected to the middle mast.

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

[0034] As piston rod 3 descends, it moves piston part 4 toward oil injection part 21. When piston rod 3 reaches its lower position, the end of buffer member 43 away from piston part 4 is axially inserted into buffer groove 61. The convex and concave structure is used to squeeze and achieve a buffering effect. At the same time, when buffer member 43 comes into contact with piston part 4, buffer spring 54 in valve assembly 5 begins to tighten and, together with gasket 71, comes into contact with buffer sleeve 42, further enhancing the buffering effect. This ensures operational stability, reduces damage to the gantry structure, and extends service life.

[0035] The specific embodiments described herein are merely illustrative of the present application. Various modifications or changes can be made to the specific embodiments described herein by those skilled in the art without departing from the spirit of the present application, or the scope of the appended claims.

[0036] Although the terms portal side cylinder 1, side cylinder body 2, oil injection part 21, piston rod 3, piston connecting groove 31, piston part 4, buffer mounting groove 41, buffer sleeve 42, buffer 43, rod body connecting part 44, steel wire check ring 45, piston check ring 46, hole sealing ring 47, piston support ring 48, valve assembly 5, valve sealing ring 51, valve rod 52, fixed plate 53, buffer spring 54, concave-convex type elastic buffer structure 6, buffer groove 61, hole steel wire check ring 62, elastic buffer assembly 7, gasket 71, guide sleeve 8, dustproof ring 81, first sealing ring 82, steel-backed bearing 83, adjusting sleeve 9, etc. are used more frequently in the text, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the present application; any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. A front moving gantry with lowering buffer device, comprising a gantry body, the gantry body has an outer gantry, a middle gantry and an inner gantry, a gantry side cylinder (1) is arranged between the outer gantry and the middle gantry, the gantry side cylinder (1) comprises a side cylinder body (2) with an oil injection part (21), a piston rod (3) is movably arranged in the side cylinder body (2), one end of the piston rod (3) is provided with a piston part (4), an inner side of the piston part (4) is provided with a valve assembly (5), characterized in that, The piston part (4) is provided with a buffer mounting groove (41) at one end away from the valve assembly (5), the buffer mounting groove (41) is provided with a buffer sleeve (42), the buffer sleeve (42) is provided with a buffer piece (43) protruding axially outside the piston part (4) at one end of the circumferential inner side, and the side cylinder body (2) is provided with a concave-convex elastic buffer structure (6) corresponding to the buffer piece (43) at one end of the inner side close to the piston part (4).

2. A front moving portal according to claim 1, characterized in that, The piston rod (3) is provided with a piston connecting groove (31) at one end of the inner side close to the piston part (4), one end of the piston part (4) is provided with a rod body connecting part (44), the rod body connecting part (44) is arranged in the piston connecting groove (31), and the buffer mounting groove (41) is arranged at one end of the inner side away from the rod body connecting part (44) of the piston part (4).

3. A front moving portal according to claim 2, characterized in that, The rod body connecting part (44) is provided with a steel wire retaining ring (45) in contact with the piston rod (3) at the circumferential outer side, the valve assembly (5) is arranged at one end of the buffer mounting groove (41), and the valve assembly (5) is provided with a valve sealing ring (51) in contact with the inner side of the piston part (4) at the circumferential outer side.

4. A front moving portal according to claim 2 or 3, c h a r a c t e r i z e d in that The concave-convex elastic buffer structure (6) comprises a buffer groove (61) arranged at one end of the inner side close to the oil injection part (21) of the side cylinder body (2), the buffer piece (43) is movably inserted into the buffer groove (61) at one end away from the valve assembly (5), the buffer sleeve (42) is provided with a hole steel wire retaining ring (62) at the circumferential outer side away from the valve assembly (5), and the inner side of the valve assembly (5) is provided with an elastic buffer assembly (7) corresponding to the buffer sleeve (42).

5. A front moving portal according to claim 4, characterized in that, The elastic buffer assembly (7) comprises a gasket (71) arranged between the valve assembly (5) and the buffer sleeve (42), the inner side of the valve assembly (5) is provided with a valve rod (52), the inner side of the valve assembly (5) close to the gasket (71) is provided with a fixed plate (53), the valve rod (52) penetrates axially through the fixed plate (53) to the inner side of the gasket (71) at one end close to the gasket (71), and the valve rod (52) and the fixed plate (53) are provided with a buffer spring (54) therebetween.

6. A front moving portal according to claim 5, characterized in that, The diameter of the gasket (71) is equal to the diameter of the buffer sleeve (42), and the length of the buffer piece (43) is greater than the length of the buffer sleeve (42).

7. The front moving portal according to claim 1, wherein, The piston part (4) is provided with a piston retaining ring (46) at the circumferential outer side, one side of the piston retaining ring (46) is provided with a hole sealing ring (47), the hole sealing ring (47) is provided with a piston support ring (48) at one side away from the piston retaining ring (46), and the piston retaining ring (46), the hole sealing ring (47) and the piston support ring (48) are in contact with the side cylinder body (2).

8. The front moving portal according to claim 1, wherein, The side cylinder body (2) is provided with a guide sleeve (8) between the side cylinder body (2) and the piston rod (3) at one end away from the oil injection part (21), the guide sleeve (8) is provided with a dustproof ring (81) at one side close to the piston rod (3), one side of the dustproof ring (81) is provided with a first sealing ring (82), one side of the first sealing ring (82) away from the dustproof ring (81) is provided with a steel-backed bearing (83), and the dustproof ring (81), the first sealing ring (82) and the steel-backed bearing (83) are all in contact with the piston rod (3).

9. A front moving portal according to claim 8, characterized in that, The piston rod (3) is sleeved with an adjusting sleeve (9) on the outside, and the adjusting sleeve (9) is located between the guide sleeve (8) and the piston part (4).

10. The front moving portal according to claim 1, wherein, The side cylinder body (2) is connected with the outer portal frame at one end close to the oil injection part (21), and the piston rod (3) is connected with the middle portal frame at one end away from the side cylinder body (2).

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