Scissor type hydraulic jack

Abstract

The utility model relates to the technical field of hydraulic shear type jacks, and discloses a shear type hydraulic jack which comprises a hydraulic shear type jack body arranged on the top of a base, a supporting device and a control device are arranged on the top of the base, and the supporting device comprises a sleeve rod, a sliding rod, a movable clamping tooth, a toothed plate, a push plate, a reset spring, a supporting spring and an abutting plate. The sleeve rod is installed at the top of the base in a sliding mode, the sliding rod penetrates through the top of the sleeve rod and is in sliding connection with the sleeve rod, and the push plate penetrates through the front face of the sleeve rod. The movable clamping teeth abut against the toothed plate, the sliding rod is limited, the sleeve rod and the sliding rod can support the hydraulic shear type jack, and the situation that the hydraulic shear type jack is broken due to long-time use or exceeding of bearing limitation is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic scissor jacks, specifically a scissor hydraulic jack. Background Technology

[0002] Hydraulic scissor jacks are well-known lifting devices. They are based on the geometric principle that shortening the base of an isosceles triangle raises the height of the triangle with the two sides remaining unchanged. The upper and lower arms are connected together and designed to rotate relative to each other. The movement of the piston rod is driven by hydraulic power, which in turn moves the top block fixed to the free end of the piston rod. The linkage arms on both sides of the top block move according to the raising and lowering of the top block, thereby driving the lifting movement of the lower pair of arms connected to the other end of the linkage arm. This lifts or lowers the other pair of upper arms, realizing the lifting movement of the entire jack.

[0003] However, the hydraulic scissor jacks currently in use, such as the hydraulic scissor jack announced with the announcement number "CN207713322U", have no direct support on both sides of the scissor jack. After long-term use or exceeding its load-bearing limit, they are prone to breakage, leading to danger. Therefore, we propose a new type of hydraulic scissor jack. Utility Model Content

[0004] The purpose of this utility model is to provide a scissor-type hydraulic jack to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a scissor-type hydraulic jack, comprising a hydraulic scissor jack disposed on the top of a base, wherein a support device and a control device are disposed on the top of the base, and the support device includes:

[0006] Sleeve rod, used in conjunction with slide rod to support the side wall of hydraulic scissor jack;

[0007] The movable locking teeth are used to cooperate with the toothed plate to restrict the slide bar in one direction.

[0008] The push plate is used to control the toothed plate to move closer to the movable tooth.

[0009] Preferably, the sleeve rod is slidably mounted on the top of the base, the slide rod passes through the top of the sleeve rod and is slidably connected to the sleeve rod, the push plate passes through the front of the sleeve rod, the center of the push plate is hinged to the sleeve rod, the movable locking tooth passes through the front of the slide rod and is slidably connected to the slide rod, a return spring is fixed to the inner wall of the slide rod, the end of the return spring away from the slide rod is fixed to the movable locking tooth, the tooth plate is slidably mounted on the inner wall of the sleeve rod, a support spring is fixed to the side of the tooth plate away from the slide rod, the end of the support spring away from the tooth plate is fixed to the inner wall of the sleeve rod, the top of the slide rod is hinged to the two arms of the hydraulic scissor jack, and an abutment plate is slidably mounted on the top of the base. When the user controls the hydraulic scissor jack to lift, the two arms of the hydraulic scissor jack gradually move closer together to achieve lifting. At this time, the hydraulic scissor jack... The side arm of the jack pulls the slide rod and sleeve rod towards the center of the base. The push plate is abutted by the abutment plate, causing the push plate to rotate at the hinged position with the sleeve rod. The push plate then pushes the toothed plate towards the side of the movable locking tooth, engaging with it. As the sleeve rod and slide rod continue to move, the slide rod gradually moves upward within the sleeve rod. At this time, the slide rod moves upward along with the movable locking tooth. The inclined surface of the movable locking tooth abuts against the inclined surface of the toothed plate, causing the movable locking tooth to retract into the slide rod without affecting its normal upward movement. However, when the two arms of the hydraulic scissor jack apply a downward force to the slide rod, the slide rod moves downward with the movable locking tooth. The movable locking tooth abuts against the toothed plate, thus restricting the slide rod. The sleeve rod and slide rod can then support the hydraulic scissor jack, preventing it from breaking due to prolonged use or exceeding its load-bearing limit.

[0010] Preferably, the support device is provided in two sets, which are symmetrically arranged on both sides of the hydraulic scissor jack. The two sets of support devices can better support the hydraulic scissor jack.

[0011] Preferably, the control device includes a connecting rod, with both ends of the connecting rod fixed to two sets of abutment plates respectively. A pull rod is fixed to the front of the connecting rod, and the pull rod passes through a fixed plate and is slidably connected to the fixed plate. The bottom of the fixed plate is fixed to the top of the base, and a connecting spring is fixed to the front of the fixed plate. The end of the connecting spring away from the fixed plate is fixed to the pull rod. A locking rod is slidably installed on the top of the base. A locking groove is provided on the left side of the connecting rod, and the locking rod can be locked in the locking groove on the left side of the connecting rod to limit the movement of the connecting rod. The position of the contact plate is restricted to ensure its stability when the push plate contacts it. When the hydraulic scissor jack needs to be reset, simply control the locking rod to exit from the slot on the left side of the connecting rod. At this time, under the action of the connecting spring, the pull rod moves the connecting rod and the contact plate away from the sleeve rod. The push plate is no longer in contact. Under the action of the support spring, the toothed plate moves away from the movable locking tooth, thus releasing the one-way restriction on the sliding rod. At this time, the user only needs to control the hydraulic scissor jack to reset.

[0012] Compared with the prior art, this utility model provides a scissor-type hydraulic jack, which has the following beneficial effects:

[0013] 1. This scissor jack, through its supporting device, allows the sliding rod to move downwards with the movable locking teeth when the two arms of the scissor jack apply a downward force. The movable locking teeth then contact the tooth plate, thus restricting the sliding rod. The sleeve and the sliding rod can then support the hydraulic scissor jack, preventing it from breaking due to prolonged use or exceeding its load-bearing limit.

[0014] 2. When the user controls the hydraulic scissor jack to lift the object, the two arms of the jack gradually move closer together to achieve the lifting effect. At this time, the side arms of the hydraulic scissor jack pull the slide rod and sleeve rod towards the center of the base. The push plate is abutted by the abutment plate, causing the push plate to rotate at the hinged position with the sleeve rod. The push plate then pushes the toothed plate towards the side of the movable locking tooth, engaging with the movable locking tooth. As the sleeve rod and slide rod continue to move, the slide rod gradually moves upward within the sleeve rod. At this time, the slide rod moves upward along with the movable locking tooth. The inclined surface of the movable locking tooth abuts against the inclined surface of the toothed plate, causing the movable locking tooth to retract into the slide rod without affecting the normal upward movement of the slide rod.

[0015] 3. This scissor jack, through its control device, allows for easy resetting when the hydraulic scissor jack needs to be reset. First, the locking rod is disengaged from the slot on the left side of the connecting rod. Then, under the action of the connecting spring, the pull rod, along with the connecting rod and the contact plate, moves away from the sleeve rod. At this point, the push plate is no longer in contact, and under the action of the support spring, the toothed plate moves away from the movable locking tooth, thus releasing the unidirectional restriction on the sliding rod. The user then only needs to reset the hydraulic scissor jack. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall front view of the present invention;

[0017] Figure 2 This is a schematic diagram of the connection structure of the base, control device and two sets of support devices of this utility model;

[0018] Figure 3 This is a schematic diagram of the connection structure between the support device and the control device of this utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the support device of this utility model.

[0020] In the diagram: 1. Base; 2. Hydraulic scissor jack; 3. Support device; 31. Sleeve rod; 32. Slide rod; 33. Movable locking tooth; 34. Tooth plate; 35. Push plate; 36. Return spring; 37. Support spring; 38. Contact plate; 4. Control device; 41. Connecting rod; 42. Pull rod; 43. Fixing plate; 44. Connecting spring; 45. Locking rod. Detailed Implementation

[0021] like Figures 1-4 As shown, this utility model provides a technical solution: a scissor hydraulic jack, including a hydraulic scissor jack 2 set on the top of a base 1. The top of the base 1 is provided with a support device 3 and a control device 4. The support device 3 includes: a sleeve rod 31, a sliding rod 32, a movable locking tooth 33, a toothed plate 34, a push plate 35, a return spring 36, a support spring 37, and a contact plate 38.

[0022] The sleeve rod 31 is slidably mounted on the top of the base 1. The slide rod 32 passes through the top of the sleeve rod 31 and is slidably connected to the sleeve rod 31. The push plate 35 passes through the front of the sleeve rod 31, and the center of the push plate 35 is hinged to the sleeve rod 31. The movable retaining tooth 33 passes through the front of the slide rod 32 and is slidably connected to the slide rod 32. A return spring 36 is fixed to the inner wall of the slide rod 32. The end of the return spring 36 away from the slide rod 32 is fixed to the movable retaining tooth 33. The tooth plate 34 is slidably mounted on the inner wall of the sleeve rod 31. A support spring 37 is fixed to the side of the toothed plate 34 away from the slide rod 32. The end of the support spring 37 away from the toothed plate 34 is fixed to the inner wall of the sleeve rod 31. The top of the slide rod 32 is hinged to the two arms of the hydraulic scissor jack 2. An abutment plate 38 is slidably installed on the top of the base 1. When the user controls the hydraulic scissor jack 2 to lift it, the two arms of the hydraulic scissor jack 2 gradually move closer together to achieve the lifting. At this time, the side arms of the hydraulic scissor jack 2 pull the slide rod 32 and the sleeve rod 31. As the push plate 35 moves closer to the center of the base 1, it is pressed against the abutment plate 38, causing the push plate 35 to rotate at the hinged position with the sleeve rod 31. The push plate 35 then pushes the toothed plate 34 to move closer to the movable locking tooth 33 and engage with it. As the sleeve rod 31 and the slide rod 32 continue to move, the slide rod 32 gradually moves upward within the sleeve rod 31. At this time, the slide rod 32 moves upward along with the movable locking tooth 33, and the inclined surface of the movable locking tooth 33 engages with the inclined surface of the toothed plate 34. The contact causes the movable locking tooth 33 to retract into the slide rod 32, which does not affect the normal upward movement of the slide rod 32. However, when the two arms of the hydraulic scissor jack 2 apply a downward force to the slide rod 32, the slide rod 32 moves downward with the movable locking tooth 33. The movable locking tooth 33 contacts the tooth plate 34, thereby restricting the slide rod 32. The sleeve rod 31 and the slide rod 32 can then support the hydraulic scissor jack 2, preventing the hydraulic scissor jack 2 from breaking due to prolonged use or exceeding the load limit.

[0023] The support device 3 is provided in two sets, which are symmetrically arranged on both sides of the hydraulic scissor jack 2. The two sets of support devices 3 can better support the hydraulic scissor jack 2.

[0024] The control device 4 includes a connecting rod 41, with both ends of the connecting rod 41 fixed to two sets of abutment plates 38 respectively. A pull rod 42 is fixed to the front of the connecting rod 41, and the pull rod 42 passes through a fixed plate 43 and is slidably connected to the fixed plate 43. The bottom of the fixed plate 43 is fixed to the top of the base 1, and a connecting spring 44 is fixed to the front of the fixed plate 43. The end of the connecting spring 44 away from the fixed plate 43 is fixed to the pull rod 42. A locking rod 45 is slidably installed on the top of the base 1. A locking groove is provided on the left side of the connecting rod 41, and the locking rod 45 can be locked in the locking groove on the left side of the connecting rod 41 to limit the connection rod 41, thereby controlling the abutment plates 38. The position is restricted to ensure the stability of the contact plate 38 when the push plate 35 contacts the contact plate 38. When it is necessary to control the hydraulic scissor jack 2 to reset, simply control the locking rod 45 to exit from the slot on the left side of the connecting rod 41. At this time, under the action of the connecting spring 44, the pull rod 42 moves the connecting rod 41 and the contact plate 38 away from the sleeve rod 31. At this time, the push plate 35 is no longer in contact. Under the action of the support spring 37, the toothed plate 34 moves away from the movable locking tooth 33, thereby releasing the one-way restriction on the sliding rod 32. At this time, the user only needs to control the hydraulic scissor jack 2 to reset.

[0025] In this invention, during use, when the user controls the hydraulic scissor jack 2 to lift, the two arms of the hydraulic scissor jack 2 gradually move closer together to achieve the lifting effect. At this time, the side arms of the hydraulic scissor jack 2 pull the sliding rod 32 and the sleeve rod 31 to move towards the center of the base 1. The push plate 35 is abutted by the abutment plate 38, causing the push plate 35 to rotate at the hinged position with the sleeve rod 31. The push plate 35 can then push the toothed plate 34 to move towards the side of the movable locking tooth 33 and engage with the movable locking tooth 33. As the sleeve rod 31 and the sliding rod 32 continue to move, the sliding rod 32 gradually moves upward within the sleeve rod 31. At this time, the slide rod 32 moves upward together with the movable locking tooth 33. The inclined surface of the movable locking tooth 33 abuts against the inclined surface of the tooth plate 34, causing the movable locking tooth 33 to retract into the slide rod 32. This does not affect the normal upward movement of the slide rod 32. However, when the two arms of the hydraulic scissor jack 2 apply a downward force to the slide rod 32, the slide rod 32 moves downward with the movable locking tooth 33. The movable locking tooth 33 abuts against the tooth plate 34, thus restricting the slide rod 32. The sleeve rod 31 and the slide rod 32 can then support the hydraulic scissor jack 2, preventing the hydraulic scissor jack 2 from breaking due to prolonged use or exceeding the load limit.

[0026] When it is necessary to control the hydraulic scissor jack 2 to reset, simply control the locking rod 45 to exit from the slot on the left side of the connecting rod 41. At this time, under the action of the connecting spring 44, the pull rod 42 moves the connecting rod 41 and the contact plate 38 away from the sleeve rod 31. At this time, the push plate 35 is no longer in contact. Under the action of the support spring 37, the toothed plate 34 moves away from the movable locking tooth 33, thereby releasing the one-way restriction on the sliding rod 32. At this time, the user only needs to control the hydraulic scissor jack 2 to reset.

[0027] After complete reset, the user only needs to push the lever 42 to control the contact plate 38 to reset, and insert the locking lever 45 into the slot on the left side of the connecting rod 41 for easy use next time.

[0028] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A hydraulic scissors jack comprising a hydraulic scissors jack (2) arranged on top of a base (1), characterized in that: The top of the base (1) is provided with supporting device (3) and control device (4), the supporting device (3) comprises: The sleeve rod (31) is used for supporting the side wall of the hydraulic shear jack (2) in cooperation with the sliding rod (32); The movable clamping tooth (33) is used for one-way limiting the sliding rod (32) in cooperation with the tooth plate (34); The push plate (35) is used for controlling the tooth plate (34) to move to the side close to the movable clamping tooth (33).

2. A scissors hydraulic jack as claimed in claim 1 wherein: The sleeve rod (31) is slidingly installed on the top of the base (1), the sliding rod (32) penetrates the top of the sleeve rod (31) and is slidingly connected with the sleeve rod (31), the push plate (35) penetrates the front face of the sleeve rod (31), the center position of the push plate (35) is hinged with the sleeve rod (31), the movable clamping tooth (33) penetrates the front face of the sliding rod (32) and is slidingly connected with the sliding rod (32), and the inner wall of the sliding rod (32) is fixed with the reset spring (36).

3. A scissors hydraulic jack as claimed in claim 2, wherein: The end of the reset spring (36) away from the sliding rod (32) is fixed with the movable clamping tooth (33), the tooth plate (34) is slidingly installed on the inner wall of the sleeve rod (31), one side of the tooth plate (34) away from the sliding rod (32) is fixed with the supporting spring (37), the end of the supporting spring (37) away from the tooth plate (34) is fixed on the inner wall of the sleeve rod (31), and the top of the sliding rod (32) is hinged on the two side arms of the hydraulic shear jack (2).

4. The scissors hydraulic jack of claim 1 wherein: The supporting device (3) is provided with two groups, and the two groups of supporting devices (3) are symmetrically arranged on the two sides of the hydraulic shear jack (2).

5. A scissors hydraulic jack as claimed in claim 4 wherein: The control device (4) comprises a connecting rod (41), both ends of the connecting rod (41) are fixed with two groups of abutting plates (38) respectively, the front face of the connecting rod (41) is fixed with a pull rod (42), the pull rod (42) penetrates a fixed plate (43) and is slidingly connected with the fixed plate (43), and the bottom of the fixed plate (43) is fixed on the top of the base (1).

6. A scissors hydraulic jack as claimed in claim 5 wherein: The front face of the fixed plate (43) is fixed with a connecting spring (44), one end of the connecting spring (44) away from the fixed plate (43) is fixed with the pull rod (42), the top of the base (1) is slidingly installed with a clamping rod (45), and the left side of the connecting rod (41) is provided with a clamping groove.

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