Electric wheel puller and auxiliary equipment for replacing wheels

Abstract

The utility model provides an electric wheel puller and auxiliary equipment used for replacing wheels, and belongs to the field of portable tools, the electric wheel puller comprises a connecting plate, an ejector rod and a connecting rod, external threads are formed on the periphery of the ejector rod, the ejector rod penetrates through the middle of the connecting plate along the axis of the ejector rod, the periphery of the ejector rod is matched with the threads of the connecting plate, and the connecting plate is connected with the ejector rod. The length direction of the connecting plate is perpendicular to the axis of the ejector rod. The number of the connecting rods is two, the two connecting rods are both parallel to the ejector rod, the two connecting rods are arranged at the two ends of the connecting plate respectively, the ejector rod is located between the two connecting rods, one end of each connecting rod is connected with the connecting plate, and the other end of each connecting rod is connected with a wheel to be pulled out. Compared with the prior art, the connecting plate, the ejector rod and the connecting rod are matched with one another, so that the technical problem that an existing track wheel and an existing wheel shaft are inconvenient to disassemble is solved.

Description

Technical Field

[0001] The utility model belongs to the field of portable tools, and more specifically, relates to an electric wheel puller. The utility model also relates to an auxiliary device for replacing wheels. Background Art

[0002] A wheelset is a component consisting of an axle and two identical wheels, located between the track and the vehicle. Its function is to ensure the running and steering of the rolling stock on the rails. It bears all static and dynamic loads from the subway train, transfers them to the rails, and transmits loads caused by track irregularities to various rolling stock components.

[0003] Generally speaking, in order to make the connection between the track wheel and the axle more secure, the track wheel is generally connected to the outer periphery of the axle by interference fit; in order to facilitate assembly, the operator heats the axle in a water bath and shrinks the size of the axle by freezing, and then uses the thermal expansion of the track wheel and the cold contraction of the axle to sleeve the track wheel on the outer periphery of the axle; however, while the above installation method can form a stable connection between the wheel and the axle, it also makes it extremely inconvenient to remove the track wheel from the axle; due to the interference fit between the track wheel and the axle, the track wheel and the axle will be deformed during the process of knocking the track wheel, so that the stability of the connection between the track wheel and the axle after reassembly needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to provide an electric puller to solve the technical problem of inconvenient disassembly between the existing track wheel and the wheel axle.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide an electric puller, comprising:

[0006] connecting plate;

[0007] A mandrel having an outer thread formed on its outer circumference, and the mandrel passes through the middle of the connecting plate along its own axis, and the outer circumference of the mandrel is adapted to the connecting plate thread, and the length direction of the connecting plate is perpendicular to the axis of the mandrel;

[0008] There are two connecting rods, both of which are parallel to the top rod, and the two connecting rods are respectively arranged at the two ends of the connecting plate, the top rod is located between the two connecting rods, one end of the connecting rod is connected to the connecting plate, and the other end is connected to the wheel to be pulled out.

[0009] In one possible implementation, an abutment portion is formed at one end of the push rod that abuts the wheel axle, the diameter of the abutment portion gradually decreases in the direction facing the wheel axle, and a ball is connected to the portion where the abutment portion abuts the wheel axle.

[0010] In a possible implementation, one end of the ball away from the abutting portion is fixedly connected to a support foot, and the support foot can abut against the axial end surface of the wheel axle.

[0011] In a possible implementation, the two connecting rods can approach or move away from each other along the length direction of the connecting plate, and a through slot is provided at the end of the connecting plate, and the length direction of the through slot is parallel to the length direction of the connecting plate.

[0012] In one possible implementation, one end of the connecting rod is hinged to the end of the connecting plate through a first hinge axis, the first hinge axis is perpendicular to the length direction of the connecting plate, and the other end of the connecting rod is hinged to a connecting member, the swing axis of the connecting member is parallel to the first hinge axis, and the connecting member is used to connect the wheel and the connecting rod.

[0013] In a possible implementation, the connecting member includes a screw, which is hinged to the connecting rod via a second hinge axis, the second hinge axis is parallel to the first hinge axis, and the screw can be screwed into a screw hole of the wheel.

[0014] In a possible implementation, the connecting member includes a hook, and the hook is swingably connected to the connecting rod via a second hinge axis, and the second hinge axis is parallel to the first hinge axis.

[0015] In one possible implementation, the electric puller further includes a driving mechanism, which includes a driving motor, a locking ring and a accommodating handle, the accommodating handle being provided with a accommodating cavity for accommodating the driving motor, the locking ring being provided at the power output end of the driving motor, the axis of the driving motor being perpendicular to the axis of the locking ring, the locking ring being capable of being sleeved on the end of the push rod, and the locking ring and the push rod rotating synchronously, and the driving motor being used to drive the locking ring to rotate.

[0016] Compared with the prior art, the electric puller provided by the present invention has the following beneficial effects:

[0017] Firstly, during the rotation process, the push rod in the present invention can drive the connecting plate to move axially along the push rod through the threaded adaptation between itself and the connecting plate. At the same time, the two connecting rods are always connected to the two ends of the wheel and the connecting plate, and the tensile force evenly distributed on both sides is used to prevent the connecting plate from moving axially relative to the wheel along the push rod. Then, the push rod can push the wheel axle while rotating around its own axis, so that axial displacement occurs between the rail wheel and the wheel axle, thereby facilitating the peeling of the wheel from the wheel axle, thereby solving the technical problem of the inconvenience of disassembling the existing wheel on the wheel axle.

[0018] Another object of the present invention is to provide an auxiliary device for replacing a wheel, comprising the electric puller described above.

[0019] Compared with the prior art, the auxiliary device for replacing wheels in the present invention has all the benefits of the above-mentioned electric puller, which will not be described here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the electric puller provided by the utility model;

[0022] Figure 2 The figure is a structural diagram of the connecting rod and the hook in the electric puller of the present utility model.

[0023] In the picture:

[0024] 1. Connecting plate;

[0025] 2. Push rod; 21. Abutment portion; 22. Ball bearing; 23. Support foot;

[0026] 3. Connecting rod; 31. First hinge axis; 32. Second hinge axis; 33. Connecting piece; 331. Screw; 332. Hook;

[0027] 4. Driving mechanism; 41. Locking ring; 42. Accommodating handle. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0029] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", and "back" appear to indicate orientation or positional relationships, they are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0030] Furthermore, in the description of this utility model, unless otherwise expressly defined, the terms "mounted," "connected," "connection," and "connector" should be interpreted broadly. For example, a connection can be a fixed connection, a removable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] Please also refer to Figures 1 to 2 The electric puller provided by the present invention is now described. The electric puller comprises a connecting plate 1, a push rod 2, and a connecting rod 3. The push rod 2 has an external thread formed on its outer circumference and passes through the middle of the connecting plate 1 along its own axis. The outer circumference of the push rod 2 is threadably matched with the connecting plate 1, and the length of the connecting plate 1 is perpendicular to the axis of the push rod 2. There are two connecting rods 3, both parallel to the push rod 2, and the two connecting rods 3 are respectively arranged at both ends of the connecting plate 1. The push rod 2 is located between the two connecting rods 3. One end of the connecting rod 3 is connected to the connecting plate 1, and the other end is connected to the wheel to be pulled.

[0033] As configured above, the push rod 2 in this embodiment can drive the connecting plate 1 to move axially along the push rod 2 during the rotation process through the threaded adaptation between itself and the connecting plate 1. At the same time, the two connecting rods 3 are always connected to the two ends of the wheel and the connecting plate 1, and the tensile force evenly distributed on both sides is used to prevent the connecting plate 1 from moving axially relative to the wheel along the push rod 2. Then, the push rod 2 can push the wheel axle while rotating around its own axis, so that axial displacement occurs between the rail wheel and the wheel axle, thereby facilitating the peeling of the wheel from the wheel axle, thereby solving the technical problem of the inconvenience of disassembling the existing wheel on the wheel axle.

[0034] Based on the above embodiments, considering that the existing wheel axle end is generally provided with a positioning hole for easy turning, in order to prevent sliding between the push rod 2 and the end face of the wheel axle, a feasible implementation method is proposed. Specifically, an abutment portion 21 is formed at one end of the push rod 2 that abuts the wheel axle of the wheel. The diameter of the abutment portion 21 gradually decreases in the direction facing the wheel axle, so as to utilize the sharp angle formed by the abutment portion 21 to abut the positioning hole at the end of the wheel axle. Moreover, preferably, in order to solve the technical problem that the tip of the abutment portion 21 is severely worn due to friction during the rotation relative to the positioning hole, the tip of the abutment portion 21 can be oiled, or a ball 22 can be connected to the tip of the abutment portion 21, and the ball 22 abuts against the wheel axle, so as to utilize the high hardness and easy replacement of the ball 22 to prevent the tip of the abutment portion 21 from being seriously damaged.

[0035] Optionally, when no positioning hole is provided at the end of the axle, a feasible implementation method is proposed. Specifically, the end of the ball 22 away from the abutment portion 21 is fixedly connected to a support foot 23, and the support foot 23 can abut the axial end face of the axle to support the axle through the support foot 23 to prevent radial offset between the push rod 2 and the axial end face of the axle.

[0036] Based on the above embodiments, a feasible implementation method is proposed, in which the two connecting rods 3 can approach or move away from each other along the length direction of the connecting plate 1, and a through slot is provided at the end of the connecting plate 1, and the length direction of the through slot is parallel to the length direction of the connecting plate 1, so that the spacing between the two connecting rods 3 can be adjusted according to the diameter of the axle, so that the electric puller in this embodiment can be applicable to axles and track wheels of various sizes.

[0037] As an alternative implementation, one end of the connecting rod 3 is hinged to the end of the connecting plate 1 through a first hinge shaft 31, and the first hinge shaft 31 is perpendicular to the length direction of the connecting plate 1. The other end of the connecting rod 3 is hinged with a connecting member 33, and the swing axis of the connecting member 33 is parallel to the first hinge shaft 31. The connecting member 33 is used to connect the wheel and the connecting rod 3. Therefore, this embodiment can improve the applicability of this embodiment to axles and track wheels of different sizes and specifications through the swing of the connecting rod 3, and use the swinging connecting member 33 to connect the inclined connecting rod 3 to the wheel axle, so as to utilize the stable structure composed of the top rod 2, the connecting plate 1 and the connecting rod 3 to prevent the top rod 2 from radially offset during rotation.

[0038] In the above embodiment, preferably, the connecting member 33 includes a screw 331, which is hinged to the connecting rod 3 through the second hinge shaft 32, the second hinge shaft 32 is parallel to the first hinge shaft 31, and the screw 331 can be screwed into the screw hole of the wheel to form a stable connection between the connecting member 33 and the wheel through the screw 331, thereby preventing the connection between the connecting member 33 and the wheel from loosening during the process of the top rod 2 supporting the wheel axle.

[0039] Taking into account that some wheels do not have threaded holes on their end faces, based on the above embodiments, in order to facilitate the connection of the connecting rod 3 to the wheel, a feasible implementation method is proposed. Specifically, the connecting member 33 includes a hook 332, and the hook 332 is swingably connected to the bottom end of the connecting rod 3 through the second hinge shaft 32. The second hinge shaft 32 is parallel to the first hinge shaft 31, so that the hook 332 can be hooked to the edge of the wheel through the swing of the hook 332, and then the hook 332 is used to form a connection between the connecting rod 3 and the wheel, thereby solving the technical problem of the inconvenience of connecting the existing connecting rod 3 to the wheel. In addition, the hook 332 hinged to the connecting rod 3 is more convenient to adjust the angle of the hook 332 relative to the connecting rod 3, thereby making the hook 332 more securely hooked to the edge of the wheel.

[0040] Of course, integrally connecting the hook 332 and the connecting rod 3 is also an optional implementation. This implementation can make the overall structure of the electric puller simpler and reduce the production cost of the electric puller.

[0041] In addition to the above feasible implementation methods, in order to drive the push rod 2 to rotate, a more preferred implementation method is proposed. In detail, the electric puller mentioned above also includes a driving mechanism 4, which includes a driving motor, a locking ring 41 and a accommodating handle 42. The accommodating handle 42 is provided with an accommodating cavity for accommodating the driving motor. The locking ring 41 is provided at the power output end of the driving motor. The axis of the driving motor is perpendicular to the axis of the locking ring 41. The locking ring 41 can be sleeved on the end of the push rod 2, and the locking ring 41 rotates synchronously with the push rod 2. The driving motor is used to drive the locking ring 41 to rotate. With such an arrangement, the on-site operator can fix the driving motor by holding the accommodating handle 42, and then drive the locking ring 41 to rotate by the driving motor. During the rotation, the locking ring 41 drives the push rod 2 to rotate, so as to pull the wheel out from the axle, thereby solving the technical problem that the existing wheel pulling device is inefficient due to manual operation.

[0042] In summary, during the rotation process, the push rod 2 in the utility model can drive the connecting plate 1 to move axially along the push rod 2 through the threaded adaptation between itself and the connecting plate 1, and then drive the wheel to move along the axis of the push rod 2 through the two connecting rods 3, and generate axial displacement between the rail wheel and the wheel axle, thereby facilitating the peeling of the wheel from the wheel axle, thereby solving the technical problem of the inconvenience of disassembling the existing wheel on the wheel axle; in addition to the above-mentioned beneficial effects, the utility model also hooks and pulls the wheel without threaded holes by hinged hooks 332 at the end of the connecting rod 3, and adapts the utility model to the axles of wheels of different specifications by swinging the connecting rod 3, thereby improving the applicability of the utility model; in addition, the utility model also uses the rotation of the driving motor in the driving mechanism 4 to rotate the push rod 2, thereby improving the efficiency of pulling out the wheel on the wheel axle, and the utility model integrates the motor in the handle, so that the operating logic of the driving mechanism 4 is more ergonomic, thereby improving the operating efficiency of the electric puller in the utility model.

[0043] Based on the same inventive concept, the present invention also proposes an auxiliary device for replacing wheels, which includes the electric puller mentioned above.

[0044] Compared with the prior art, the auxiliary device for replacing wheels in the present invention has all the benefits of the above-mentioned electric puller, which will not be described here.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electric puller, characterized in that: include: Connecting plate (1); A push rod (2) having an external thread formed on its outer circumference, and the push rod (2) passes through the middle of the connecting plate (1) along its own axis, and the outer circumference of the push rod (2) is adapted to the thread of the connecting plate (1), and the length direction of the connecting plate (1) is perpendicular to the axis of the push rod (2); There are two connecting rods (3), both of which are parallel to the top rod (2), and the two connecting rods (3) are respectively arranged at the two ends of the connecting plate (1), the top rod (2) is located between the two connecting rods (3), one end of the connecting rod (3) is connected to the connecting plate (1), and the other end is connected to the wheel to be pulled out.

2. The electric puller according to claim 1, wherein: An abutting portion (21) is formed at one end of the push rod (2) abutting against the wheel axle. The diameter of the abutting portion (21) gradually decreases in the direction facing the wheel axle, and a ball (22) is spherically connected to the portion where the abutting portion (21) abuts against the wheel axle.

3. The electric puller according to claim 2, wherein: One end of the ball (22) away from the abutting portion (21) is fixedly connected to a support leg (23), and the support leg (23) can abut against the axial end surface of the wheel axle.

4. The electric puller according to claim 1, wherein: The two connecting rods (3) can move closer to or farther from each other along the length direction of the connecting plate (1); a through slot is provided at the end of the connecting plate (1); and the length direction of the through slot is parallel to the length direction of the connecting plate (1).

5. The electric puller according to claim 1, wherein: One end of the connecting rod (3) is hinged to the end of the connecting plate (1) through a first hinge shaft (31), and the first hinge shaft (31) is perpendicular to the length direction of the connecting plate (1). The other end of the connecting rod (3) is hinged to a connecting piece (33), and the swing axis of the connecting piece (33) is parallel to the first hinge shaft (31). The connecting piece (33) is used to connect the wheel and the connecting rod (3).

6. The electric puller according to claim 5, characterized in that The connecting member (33) includes a screw (331), the screw (331) is hinged to the connecting rod (3) through a second hinge axis (32), the second hinge axis (32) is parallel to the first hinge axis (31), and the screw (331) can be screwed into a screw hole of the wheel.

7. The electric puller according to claim 5, wherein: The connecting member (33) includes a hook (332), and the hook (332) is swingably connected to the connecting rod (3) via a second hinge shaft (32), and the second hinge shaft (32) is parallel to the first hinge shaft (31).

8. The electric puller according to claim 1, wherein: The electric puller further comprises a driving mechanism (4), the driving mechanism (4) comprising a driving motor, a locking ring (41) and a receiving handle (42), the receiving handle (42) being provided with a receiving cavity for receiving the driving motor, the locking ring (41) being provided at the power output end of the driving motor, the axis of the driving motor being perpendicular to the axis of the locking ring (41), the locking ring (41) being capable of being sleeved on the end of the push rod (2), and the locking ring (41) and the push rod (2) being rotated synchronously, and the driving motor being used to drive the locking ring (41) to rotate.

9. An auxiliary device for changing wheels, characterized in that: The invention comprises the electric puller according to any one of claims 1 to 8.

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