Screw rod type trailer supporting leg with self-locking function

Abstract

The utility model relates to the technical field of trailer supporting legs, in particular to a screw rod type trailer supporting leg with a self-locking function, which improves the positioning effect when a supporting arm is used for supporting, and meanwhile, the screw rod type trailer supporting leg is matched with a positioning device to fix the sliding of the supporting arm so as to improve the supporting and using reliability. Comprising a sleeve and a supporting arm which is installed on the sleeve in an up-down sliding mode. The bottom end of the machine box is connected with the top end of the sleeve, the upper portion of the stud is rotationally installed in the machine box, the lower portion of the stud extends into the sleeve, the upper portion of the supporting arm is installed on the stud in a matched and screwed mode, and the driving device is arranged in the machine box and used for driving the stud to rotate. The driving device is arranged on the sleeve and used for locking rotation of the stud, the positioning device is arranged on the sleeve and used for fixing the supporting arm in a sliding mode, and the supporting base is installed at the bottom of the supporting arm.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of trailer support legs, particularly to a screw rod type trailer support leg with self-locking function. BACKGROUND

[0002] In the trailer transportation industry, support legs are key components that ensure the stable parking and unloading of trailers. However, there are some deficiencies in the use of support legs, especially in complex and variable transportation environments, where stability and safety often face challenges.

[0003] For example, the patent with the authorization announcement number CN220349665U, which relates to the technical field of semi-trailer support legs, particularly a semi-trailer lifting support leg, includes an outer support leg and an inner support leg, both of which are slidingly connected. The top end of the inner wall of the outer support leg is rotationally connected to a screw rod, and the bottom end of the screw rod is threadedly connected to the top end of the inner support leg. The utility model has the advantages that two limiting columns and a shell are provided, and the two support seats are fixedly connected to the bottom end of the shell. The two limiting columns are fixedly connected to the side surface of the outer support leg, which facilitates the installation of the shell on the two limiting columns.

[0004] However, it was found during use that the locking effect of the screw rod was poor, which reduced the positioning effect of the inner support leg and the reliability of supporting the trailer. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a screw rod type trailer support leg with self-locking function that improves the positioning effect of the support arm during use and fixes the sliding of the support arm with the positioning device, thereby improving the reliability of the support arm during use.

[0006] The utility model relates to a screw rod type trailer support leg with self-locking function, which includes a sleeve and a support arm. The support arm is slidingly installed on the sleeve. It also includes a driving device, a positioning device, a case, a stud, and a support seat. The bottom end of the case is connected to the top end of the sleeve. The upper part of the stud is rotationally installed in the case, and the lower part of the stud extends into the interior of the sleeve. The upper part of the support arm is screwed onto the stud. The driving device is provided in the case and is used to rotate the stud and lock the rotation of the stud. The positioning device is provided on the sleeve and is used to fix the sliding of the support arm. The support seat is installed at the bottom of the support arm. The driving device rotates the stud, which drives the support arm to move up and down, so that the support arm cooperates with the sleeve to support the trailer and improves the convenience of storing the support arm in the sleeve. The driving device locks the rotation of the stud, which improves the positioning effect of the support arm during use and fixes the sliding of the support arm with the positioning device, thereby improving the reliability of the support arm during use.

[0007] Preferably, the positioning device comprises a latch, a top plate, a tension spring, a guide rail, an inclined block and a hydraulic cylinder, the latch slides into the sleeve, the outer wall of the support arm is provided with a groove, the top plate is installed at the top end of the latch, the tension spring is installed between the sleeve and the top plate, the guide rail is arranged on the outer wall of the sleeve, the inclined block is slidably installed on the guide rail, and the inclined surface of the inclined block is in contact with the top plate, the hydraulic cylinder is installed on the outer wall of the sleeve, and the moving end of the hydraulic cylinder is connected with the outer wall of the inclined block; when the support arm is used by moving downward, the tension spring provides a pulling force to the top plate, the top plate drives the latch to slide into the groove of the support arm, so that the latch locks the support arm, and the use reliability of the support arm is improved; when the support arm needs to be stored upward, the inclined block is pushed downward by the hydraulic cylinder, the inclined block moves the top plate through the inclined surface, so that the latch slides away from the groove of the support arm, and the convenience of operation is improved.

[0008] Preferably, the driving device comprises a worm, a worm wheel and a motor, the worm is rotatably installed on the inner wall of the cabinet, the motor is installed on the outer wall of the cabinet, the output end of the motor is connected with the worm, and the worm wheel is installed on the outer wall of the screw post and engaged with the worm; the worm is driven to rotate by the motor, the screw post is driven to rotate by the engagement between the worm and the worm wheel, so that the screw post drives the support arm to move up and down, the locking effect after the screw post stops rotating is improved due to the cooperation between the worm and the worm wheel, and the positioning convenience of the support arm is improved.

[0009] Preferably, the support seat comprises a connecting piece and a bottom plate, the upper portion of the connecting piece is rotatably installed on the lower portion of the support arm, and the top end of the bottom plate is connected with the bottom end of the connecting piece; when the support arm is used by moving downward, the bottom plate is in contact with the ground, the connecting piece is arranged, the fitting effect of the support arm when being in contact with the inclined ground is improved, and the support contact area is improved.

[0010] Preferably, the support seat comprises a connecting piece and a bottom plate, the upper portion of the connecting piece is rotatably installed on the lower portion of the support arm, and the top end of the bottom plate is connected with the bottom end of the connecting piece; when the support arm is used by moving downward, the bottom plate is in contact with the ground, the connecting piece is arranged, the fitting effect of the support arm when being in contact with the inclined ground is improved, and the support contact area is improved.

[0011] Preferably, the mounting seat is arranged on the outer wall of the sleeve; the convenience of mounting and fixing the sleeve is improved.

[0012] Preferably, the outer wall of the cabinet is provided with an inspection opening; the convenience of inspection and maintenance of the inside of the cabinet is improved.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the screw post is driven to rotate by the driving device, the screw post drives the support arm to move up and down, so that the support arm cooperates with the sleeve to support the trailer, the convenience of storing the support arm in the sleeve is improved, the rotation of the screw post is locked by the driving device, the positioning effect of the support arm when being used for supporting is improved, the sliding of the support arm is fixed by cooperating with the positioning device, and the reliability of the support arm when being used for supporting is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is the shaft measurement structure schematic diagram of the utility model;

[0015] Figure 2 is the shaft measurement structure schematic diagram of the support arm and sleeve etc.

[0016] Figure 3 is the shaft measurement structure schematic diagram of the sleeve and mounting seat etc.

[0017] Figure 4 is the shaft measurement local structure schematic diagram of the inclined plane block and hydraulic cylinder etc.

[0018] Figure 5 is the shaft measurement local structure schematic diagram of the support arm and connecting piece etc.

[0019] Marked in the drawing: 1, sleeve;2, support arm;3, machine case;4, stud;5, support seat;6, bolt;7, top plate;8, tension spring;9, guide rail;10, inclined plane block;11, hydraulic cylinder;12, worm;13, worm wheel;14, motor;15, connecting piece;16, bottom plate;17, antiskid pattern;18, mounting seat. DETAILED DESCRIPTION

[0020] In order to facilitate understanding the utility model, the utility model will be described more fully below with reference to relevant drawings. The utility model can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0021] Embodiment 1

[0022] As Figures 1 to 5 shown, a silk rod type trailer support leg with self-locking function of the utility model, including sleeve 1 and support arm 2, support arm 2 is installed on sleeve 1 and slides up and down;Still including driving device, positioning device, machine case 3, stud 4 and support seat 5, the bottom end of machine case 3 is connected with the top end of sleeve 1, the upper portion of stud 4 is rotatably installed in machine case 3, the lower portion of stud 4 extends into the inside of sleeve 1, the upper portion of support arm 2 is matched and screwed on stud 4, driving device is arranged in machine case 3, driving device is used to drive stud 4 to rotate, and driving device is used to lock the rotation of stud 4, positioning device is arranged on sleeve 1, positioning device is used to fix the sliding of support arm 2, support seat 5 is installed at the bottom of support arm 2;

[0023] As Figure 4As shown, the positioning device includes a latch 6, a top plate 7, a tension spring 8, a guide rail 9, an inclined block 10 and a hydraulic cylinder 11, the latch 6 slides into the inside of the sleeve 1, the outer wall of the support arm 2 is provided with a groove, the top plate 7 is installed at the top end of the latch 6, the tension spring 8 is installed between the sleeve 1 and the top plate 7, the guide rail 9 is arranged on the outer wall of the sleeve 1, the inclined block 10 is slidably installed on the guide rail 9, and the inclined surface of the inclined block 10 is in contact with the top plate 7, and the hydraulic cylinder 11 is installed on the outer wall of the sleeve 1, and the moving end of the hydraulic cylinder 11 is connected with the outer wall of the inclined block 10.

[0024] In the embodiment, the driving device drives the screw post 4 to rotate, the screw post 4 drives the support arm 2 to move up and down, so that the support arm 2 cooperates with the sleeve 1 to support the trailer, and the convenience of the support arm 2 stored in the sleeve 1 is improved, the rotation of the screw post 4 is locked by the driving device, so that the positioning effect of the support arm 2 in use is improved, and the sliding of the support arm 2 is fixed by cooperating with the positioning device, so that the reliability of the support arm 2 in use is improved.

[0025] Embodiment 2

[0026] Based on the embodiment 1, as shown in the figure, Figure 3 The utility model discloses a screw rod type trailer support leg with self-locking function, the driving device includes worm 12, worm wheel 13 and motor 14, worm 12 rotation is installed on the inboard wall of the machine box 3, and the motor 14 is installed on the outer wall of the machine box 3, and the output end of the motor 14 is connected with the worm 12, and the worm wheel 13 is installed on the outer wall of the screw post 4, and the worm wheel 13 is engaged with the worm 12.

[0027] As shown in the figure, Figure 3 The support seat 5 includes a connecting piece 15 and a bottom plate 16, the upper portion of the connecting piece 15 is rotatably installed on the lower portion of the support arm 2, and the top end of the bottom plate 16 is connected with the bottom end of the connecting piece 15.

[0028] As shown in the figure, Figure 3 It also includes anti-skid lines 17, and the anti-skid lines 17 are arranged on the bottom end of the bottom plate 16.

[0029] As shown in the figure, Figure 4 It also includes a mounting seat 18, and the mounting seat 18 is arranged on the outer wall of the sleeve 1.

[0030] As shown in the figure, Figure 1 The outer wall of the machine box 3 is provided with an inspection hole.

[0031] In the embodiment, when the support arm 2 is moved downward for supporting use, the top plate 7 is provided with pulling force by the pull spring 8, the top plate 7 drives the bolt 6 to slide into the groove of the support arm 2, so that the bolt 6 locks the support arm 2, improves the use reliability of the support arm 2, when the support arm 2 needs to be stored upward, the inclined block 10 is pushed downward by the hydraulic cylinder 11, the inclined block 10 moves the top plate 7 through the inclined surface, so that the bolt 6 is separated from the groove of the support arm 2, improves the convenience of operation, the worm 12 is rotated by the motor 14, the worm 12 drives the stud 4 to rotate through the meshing with the worm wheel 13, so that the stud 4 drives the support arm 2 to move up and down, due to the cooperation between the worm 12 and the worm wheel 13, the locking effect after the stud 4 stops rotating is improved, and the positioning convenience of the support arm 2 is improved.

[0032] The utility model discloses a screw rod type trailer support leg with self-locking function, when working, through driving device drive stud 4 rotates, make stud 4 drive support arm 2 lift and move, thereby make support arm 2 and sleeve 1 cooperation to trailer support, improve the convenience of support arm 2 storage to sleeve 1 simultaneously.

[0033] The hydraulic cylinder 11 and the motor 14 of the screw rod type trailer support leg with self-locking function are purchased on the market, and the technical personnel in the industry only needs to install and operate according to the attached instruction manual, without the creative labor of the technical personnel in the field.

[0034] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary technical personnel in the technical field, on the premise of not departing from the technical principle of the utility model, a plurality of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection range of the utility model.

Claims

1. A screw-type trailer support leg with self-locking function, comprising a sleeve (1) and a support arm (2), wherein the support arm (2) is slidably mounted on the sleeve (1); characterized in that, It also includes a drive device, a positioning device, a housing (3), a stud (4), and a support base (5). The bottom end of the housing (3) is connected to the top end of the sleeve (1). The upper part of the stud (4) is rotatably installed inside the housing (3), and the lower part of the stud (4) extends into the sleeve (1). The upper part of the support arm (2) is screwed onto the stud (4). A drive device is provided inside the housing (3). The drive device is used to drive the stud (4) to rotate and to lock the rotation of the stud (4). A positioning device is provided on the sleeve (1). The positioning device is used to slide and fix the support arm (2). The support base (5) is installed at the bottom of the support arm (2).

2. The screw-type trailer support leg with self-locking function as described in claim 1, characterized in that, The positioning device includes a pin (6), a top plate (7), a tension spring (8), a guide rail (9), an inclined block (10), and a hydraulic cylinder (11). The pin (6) slides into the sleeve (1). The outer wall of the support arm (2) is provided with a groove. The top plate (7) is installed on the top of the pin (6). The tension spring (8) is installed between the sleeve (1) and the top plate (7). The guide rail (9) is set on the outer wall of the sleeve (1). The inclined block (10) is slidably installed on the guide rail (9), and the inclined surface of the inclined block (10) contacts the top plate (7). The hydraulic cylinder (11) is installed on the outer wall of the sleeve (1), and the moving end of the hydraulic cylinder (11) is connected to the outer wall of the inclined block (10).

3. A screw-type trailer support leg with self-locking function as described in claim 1, characterized in that, The drive device includes a worm (12), a worm wheel (13) and a motor (14). The worm (12) is rotatably mounted on the inner side wall of the housing (3). The motor (14) is mounted on the outer side wall of the housing (3). The output end of the motor (14) is connected to the worm (12). The worm wheel (13) is mounted on the outer side wall of the stud (4) and meshes with the worm (12).

4. A screw-type trailer support leg with self-locking function as described in claim 1, characterized in that, The support base (5) includes a connector (15) and a base plate (16). The upper part of the connector (15) is rotatably mounted on the lower part of the support arm (2), and the top of the base plate (16) is connected to the bottom of the connector (15).

5. A screw-type trailer support leg with self-locking function as described in claim 4, characterized in that, It also includes anti-slip texture (17), which is set at the bottom of the base plate (16).

6. A screw-type trailer support leg with self-locking function as described in claim 1, characterized in that, It also includes a mounting base (18), which is disposed on the outer wall of the sleeve (1).

7. A screw-type trailer support leg with self-locking function as described in claim 1, characterized in that, The outer wall of the chassis (3) is provided with an inspection port.

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