U-shaped stretching type electric gas spring

Abstract

The utility model discloses a U-shaped stretching type electric gas spring, which belongs to the technical field of gas springs and comprises an inflating component, a driving component and a transmission case, the inflating component and the driving component are simultaneously arranged on one side of the transmission case, and the driving component and the inflating component are arranged in a transmission manner; the transmission case comprises a first shell and a second shell, the first shell and the inflation assembly are installed mutually, the transmission case further comprises the second shell fixed to the lower portion of the first shell, and a first universal connector located on the same axis with the inflation assembly is arranged on the second shell. The electric spring is used for solving the problems that an electric spring occupies the stroke length and is inconvenient to install and maintain.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of gas spring, specifically a U type stretch formula electric gas spring. BACKGROUND

[0002] In the automobile market, the automobile tail door electric spring has been widely used, one end of the electric spring is connected with the vehicle body, and the other end is connected with the tail door or the front engine cover. The linear motion of the spring is realized by controlling the rotation of the motor of the electric spring through the controller, so that the opening and closing function of the tail door or the front engine cover is met, but the electric spring on the market still has the following problems: due to the small installation space of the tail door spring of the three-box vehicle, the length of the ordinary electric spring occupies a long space, so that the stroke cannot meet the opening angle and height of the tail door; secondly, the arrangement direction and position of the motor are changed, and it is not convenient when connected with the vehicle.

[0003] Therefore, an electric spring which can be installed in a small space, reduce the occupation of excessive stroke and facilitate installation is proposed. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the utility model provides a U type stretch formula electric gas spring, which is used to solve the problems of the electric spring occupying the stroke length and being inconvenient to install and maintain.

[0005] To achieve the above purpose, the utility model adopts the technical scheme of:

[0006] A U type stretch formula electric gas spring, comprising an inflation assembly, a driving assembly and a transmission box, the inflation assembly and the driving assembly are arranged on one side of the transmission box, and the driving assembly is transmissionally arranged between the inflation assembly;

[0007] The transmission box comprises a first shell body which is mounted with the inflation assembly, and the transmission box further comprises a second shell body which is fixed below the first shell body, and the second shell body is provided with a first universal joint head which is on the same axis as the inflation assembly.

[0008] As a further improvement of the above scheme, a support seat for supporting the inflation assembly is fixedly arranged in the first shell body, and a cavity for containing lubricating oil is arranged in the support seat.

[0009] As a further improvement of the above scheme, the inflation assembly comprises an outer shell body, the outer shell body is fixedly arranged between the first shell body, a first sleeve is slidably arranged in the inner cavity of the outer shell body, a second sleeve is also slidably and sealingly arranged in the inner cavity of the first sleeve, the second sleeve and the first sleeve are sealingly arranged with each other, and high-pressure gas is filled in the cavity formed by the outer shell body, the first sleeve and the second sleeve to form a high-pressure area.

[0010] As a further improvement of the above-mentioned scheme, the inflating assembly further comprises a threaded shaft, and the threaded shaft and the output shaft of the driving assembly are connected through a gear transmission.

[0011] The threaded shaft is threadedly connected with a sliding sleeve, the sliding sleeve and the second sleeve are fixed with each other through a connecting piece, and the threaded shaft is located inside the second sleeve.

[0012] The second sleeve is fixedly provided with a second universal joint head which is convenient for being connected with the automobile.

[0013] As a further improvement of the above-mentioned scheme, the second sleeve is provided with a sleeving end which is convenient for being sleeved with the connecting piece, the sleeving end is provided with an inner recessed clamping groove, and the clamping groove is clamped with a clamping table arranged on the connecting piece.

[0014] The sleeving end is further provided with a protruding first limiting table, and the connecting piece is provided with a first limiting groove which is convenient for being limited with the first limiting table.

[0015] As a further improvement of the above-mentioned scheme, the sliding sleeve is provided with a plug-in groove which is convenient for being plugged with the connecting piece, the connecting piece is provided with a plurality of penetrating connecting holes, and the sliding sleeve is provided with a plug pin which penetrates the connecting holes, so as to fix the sliding sleeve and the connecting piece with each other.

[0016] As a further improvement of the above-mentioned scheme, the second shell is provided with a through hole, and the through hole is provided with a bolt which is threadedly and tightly connected with the first universal joint head.

[0017] The first universal joint head is provided with a plurality of second limiting grooves, and the lower side of the second shell is provided with a second limiting table which is matched with the second limiting grooves.

[0018] As a further improvement of the above-mentioned scheme, the first shell is detachably provided with an oil inlet cap which is used for fixing the inflating assembly and is convenient for injecting lubricating oil into the inflating assembly.

[0019] Compared with the prior art, the inflating assembly has the following beneficial effects:

[0020] 1. The inflating assembly and the driving assembly are arranged on the same side of the transmission box to form a U-shaped structure, so that the length of the overall electric spring can be reduced, the length of the spring can be prevented from affecting the extension and contraction of the spring, and the space occupation can be reduced.

[0021] 2、By setting support seat in the first shell to support the inflation assembly telescopic effect, and in the drive assembly drive screw shaft rotation, can guarantee the normal rotation of screw shaft around the shaft, and the cavity set in the support seat, can play a storage effect on the lubricating oil, so that in the screw shaft rotation, can easily into the bearing and screw thread, thus can guarantee the normal telescopic in the process of motor drive, avoid jam.

[0022] 3、By setting the transmission box into the first shell and the second shell together, can accommodate the transmission structure between the inflation assembly and the drive assembly, and, can be more convenient to install the first universal joint, and the second limiting groove and the second limiting table can be matched with each other, so that the first universal joint is fixed relative to the position of the transmission box, avoid rotating, so as to reduce the loose when installed on the car. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the whole structure schematic diagram of the utility model;

[0024] Figure 2 It is the half cut structure schematic diagram of the utility model;

[0025] Figure 3 It is the explosion structure schematic diagram of the utility model;

[0026] Figure 4 It is the structure schematic diagram of connecting piece;

[0027] Figure 5 It is the structure schematic diagram of sliding sleeve;

[0028] Figure 6 It is the structure schematic diagram of second sleeve pipe.

[0029] In the drawing: 10, inflation assembly; 101, outer shell; 102, first sleeve pipe; 103, second sleeve pipe; 1031, sleeve end; 1032, clamping groove; 1033, first limiting table; 104, sliding sleeve; 1041, insertion slot; 105, connecting piece; 1051, clamping table; 1052, first limiting groove; 1053, connecting hole; 106, second universal joint; 107, screw shaft; 11, drive assembly; 12, transmission box; 121, first shell; 122, support seat; 123, cavity; 124, second shell; 125, second limiting table; 126, perforation; 127, bolt; 13, oil inlet cap; 14, first universal joint; 141, second limiting groove. DETAILED DESCRIPTION

[0030] In order to make the technical scheme better understood by the person skilled in the art, the utility model will be described in detail below in combination with embodiments, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the utility model.

[0031] As Figures 1-6 shown, the specific scheme of the embodiment is: a U-shaped stretching type electric gas spring, comprising an inflation assembly 10, a driving assembly 11 and a transmission box 12, the inflation assembly 10 and the driving assembly 11 are arranged on one side of the transmission box 12 at the same time, and the driving assembly 11 is transmissionally arranged between the inflation assembly 10, as Figure 1 shown, the inflation assembly 10 and the driving assembly 11 are arranged on one side of the transmission box 12, constituting a U shape, which can reduce the occupied space of the whole electric gas spring extension stroke, thereby facilitating installation, the driving assembly 11 comprises a driving motor and a fixing sleeve for fixing the motor and the like;

[0032] The transmission box 12 comprises a first shell 121 which is mutually mounted with the inflation assembly 10, and the transmission box 12 further comprises a second shell 124 which is fixed below the first shell 121, specifically, the first shell 121 is a hollow shell structure, the second shell 124 is a plate structure, and the two are mutually fastened and fixed through bolts, and the second shell 124 is provided with a first universal joint 14 which is on the same axis as the inflation assembly 10.

[0033] As Figure 2 shown, as a preferred mode of the above embodiment, the first shell 121 is detachably mounted with an oil inlet cap 13 which fixes the inflation assembly 10 and facilitates injection of lubricating oil into the inflation assembly 10, specifically, the middle hollow structure of the oil inlet cap 13, after the lubricating oil is injected, a rubber plug can be installed on the end of the oil inlet cap 13 for sealing, so that direct maintenance can be carried out without the need to disassemble the whole electric gas spring, which is more convenient.

[0034] The first shell 121 is fixedly provided with a support seat 122 which supports the inflation assembly 10, and the support seat 122 is provided with a cavity 123 which can accommodate lubricating oil, specifically, the oil inlet cap 13 and the support seat 122 are connected through threads, and the inside is in communication with the cavity 123.

[0035] The inflation assembly 10 comprises an outer shell 101 fixed with the first shell 121, and the oil inlet cap 13 passes through the outer shell 101. After the oil inlet cap 13 and the support seat 122 are fixed by screwing, the first shell 121, the support seat 122 and the outer shell 101 can be fixed and pressed together to start the fixed function. The inner cavity of the outer shell 101 is slidably provided with a first sleeve 102, and the outer shell 101 and the first sleeve 102 are mutually sealed. Specifically, a sealing ring is arranged on the first sleeve 102 close to the transmission box 12. The inner cavity of the first sleeve 102 is slidably and sealingly provided with a second sleeve 103. The end of the outer shell 101 away from the transmission box 12 is provided with a sliding sleeve slidably connected with the second sleeve 103. The sliding sleeve is provided with a sealing ring. The end of the first sleeve 102 away from the transmission box 12 is close to the sliding sleeve on the second sleeve 103. The second sleeve 103 and the first sleeve 102 are mutually sealed. The cavity surrounded by the outer shell 101, the first sleeve 102 and the second sleeve 103 is filled with high-pressure gas to form a high-pressure area. Specifically, in order to maintain the performance of the spring, the high-pressure gas is usually nitrogen. The filled nitrogen pushes the second sleeve 103 to be in a contracted state in the outer shell 101.

[0036] The inflation assembly 10 further comprises a threaded shaft 107 connected with the output shaft of the driving assembly 11 through gear transmission. The threaded shaft 107 is provided with a sliding sleeve 104 connected with the second sleeve 103 through a connecting piece 105. The threaded shaft 107 is located inside the second sleeve 103. The second sleeve 103 is provided with a second universal joint 106 at the extending end for connection with the automobile. Therefore, when the driving assembly 11 is started, the threaded shaft 107 can be driven to rotate through gear transmission, thereby driving the sliding sleeve 104 to drive the connecting piece 105 and the second sleeve 103 to output linearly. When the driving assembly 11 is stopped, the sliding sleeve 104, the connecting piece 105 and the second sleeve 103 have a tendency to retract inwardly under the pushing of the high-pressure gas. The retraction is mainly based on the friction between the sliding sleeve 104 and the threaded shaft 107. When the friction is small, the sliding sleeve 104 can be automatically retracted through the pressure difference of the high-pressure gas without reverse rotation of the driving assembly 11. However, when the friction is large, the sliding sleeve 104 still needs to be retracted through the driving of the driving assembly 11.

[0037] As Figure 4 , 5As shown in Figure 6, in a preferred embodiment, the second sleeve 103 is provided with a sleeve end 1031 for easy engagement with the connector 105. The sleeve end 1031 is a part extending from the second sleeve 103, and its diameter is smaller than the outer ring size on which the sealing ring is installed. The sleeve end 1031 is provided with a concave snap-fit ​​groove 1032. Specifically, the snap-fit ​​groove 1032 is an arc-shaped groove. The snap-fit ​​groove 1032 engages with the snap-fit ​​platform 1051 provided on the connector 105. The snap-fit ​​platform 1051 is an arc-shaped boss that protrudes inward on the inner ring of the connector 105. The second sleeve 103 is inserted into the connector 105, and is prevented from disengaging after the snap-fit ​​groove 1032 and the snap-fit ​​platform 1051 are engaged with each other.

[0038] The socket end 1031 is also provided with a raised first limiting platform 1033; the connector 105 is provided with a first limiting groove 1052 to facilitate mutual docking and limiting with the first limiting platform 1033. Through the limiting of the first limiting platform 1033 and the first limiting groove 1052, the second sleeve 103 and the connector 105 are prevented from rotating relative to each other.

[0039] The sliding sleeve 104 is provided with a plug groove 1041 for easy insertion of the connector 105. The connector 105 is provided with a plurality of through connecting holes 1053. The sliding sleeve 104 is provided with a pin through the connecting holes 1053 to fix the sliding sleeve 104 and the connector 105 to each other.

[0040] like Figure 3 As shown, as a preferred embodiment of the above, the second housing 124 is provided with a through hole 126, and a bolt 127 is provided in the through hole 126 to be threadedly fastened to the first universal connector 14. By screwing the bolt 127 into the first universal connector 14, the first universal connector 14 and the second housing 124 are fixed to each other.

[0041] The first universal joint 14 is provided with a plurality of second limiting grooves 141, and the lower side of the second housing 124 is provided with a second limiting platform 125 that cooperates with the second limiting grooves 141. By the mutual fastening and cooperation of the second limiting grooves 141 and the second limiting platform 125, the rotation of the first universal joint 14 can be prevented when the rotating bolt 127 is tightened, and the orientation of the first universal joint 14 can be restricted, thereby facilitating installation with the mounting position on the vehicle.

[0042] It should be noted that in this paper, the term includes, contains or any other variant is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent to such process, method, article or device. The principle and implementation of the present application are described by applying specific examples. The above examples are only used to help understand the method and core idea of the present application. The above is only the preferred embodiment of the present application. It should be pointed out that due to the limited expression of the text, there are objectively infinite specific structures. For ordinary technical personnel in this technical field, without departing from the principle of the present application, some improvements, refinements or changes can be made, and the above technical features can be combined in a proper way; these improvements, refinements, changes or combinations, or without improvement, the concept and technical scheme of the present application are directly applied to other occasions, which should be regarded as the protection scope of the present application.

Claims

1. A U-shaped tensile electric gas spring, characterized by, The application relates to an air inflation assembly (10), a driving assembly (11) and a transmission box (12), wherein the air inflation assembly (10) and the driving assembly (11) are arranged on one side of the transmission box (12) and transmission is arranged between the driving assembly (11) and the air inflation assembly (10); The transmission box (12) comprises a first shell (121) which is arranged on the air inflation assembly (10) and a second shell (124) which is fixed below the first shell (121) and is provided with a first universal joint (14) which is arranged on the same axis as the air inflation assembly (10).

2. A U-shaped tensile electric gas spring according to claim 1, characterized in that, The first shell (121) is fixedly provided with a supporting seat (122) which supports the air inflation assembly (10), and the supporting seat (122) is provided with a cavity (123) which can contain lubricating oil.

3. A U-shaped tensile electric gas spring according to claim 1, characterized in that, The air inflation assembly (10) comprises an outer shell (101) which is fixed between the first shell (121), a first sleeve (102) which is slidably arranged in the inner cavity of the outer shell (101), and a second sleeve (103) which is slidably and sealingly arranged in the inner cavity of the first sleeve (102), wherein the second sleeve (103) is sealingly arranged between the first sleeve (102), and the cavity formed by the outer shell (101), the first sleeve (102) and the second sleeve (103) is filled with high-pressure gas to form a high-pressure area.

4. A U-shaped tensile electric gas spring according to claim 3, characterized in that, The air inflation assembly (10) further comprises a threaded shaft (107) which is in gear transmission with an output shaft of the driving assembly (11); The threaded shaft (107) is threadedly connected with a sliding sleeve (104), the sliding sleeve (104) and the second sleeve (103) are fixedly connected through a connecting piece (105), and the threaded shaft (107) is located in the second sleeve (103); The second sleeve (103) is fixedly provided with a second universal joint (106) which is convenient for being connected with a vehicle.

5. A U-shaped tensile electric gas spring according to claim 4, characterized in that, The second sleeve (103) is provided with a sleeving end (1031) which is convenient for being sleeved with the connecting piece (105), the sleeving end (1031) is provided with an inner recessed clamping groove (1032), and the clamping groove (1032) is clamped with a clamping table (1051) arranged on the connecting piece (105); The sleeving end (1031) is further provided with a protruding first limiting table (1033), and the connecting piece (105) is provided with a first limiting groove (1052) which is convenient for being abutted and limited with the first limiting table (1033).

6. A U-shaped tensile electric gas spring according to claim 4, characterized in that, The sliding sleeve (104) is provided with an insertion groove (1041) which is convenient for the insertion of the connecting piece (105), the connecting piece (105) is provided with a plurality of penetrating connecting holes (1053), and the sliding sleeve (104) is provided with a bolt which penetrates the connecting holes (1053) to fixedly connect the sliding sleeve (104) and the connecting piece (105).

7. A U-shaped tensile electric gas spring according to claim 1, characterized in that, The second shell (124) is provided with a through hole (126), and the through hole (126) is provided with a bolt (127) which is in threaded fastening connection with the first universal joint (14). The first universal joint (14) is provided with a plurality of second limiting grooves (141), and the lower side of the second shell (124) is provided with a second limiting platform (125) matched with the second limiting grooves (141).

8. A U-shaped tensile electric gas spring according to claim 1, characterized in that, The first shell (121) is detachably provided with an oil inlet cap (13) for fixing the inflating assembly (10) and facilitating injection of lubricating oil into the inflating assembly (10).

Images