Novel shifting fork structure

Abstract

The utility model discloses a novel shifting fork structure which comprises a shifting fork body. A guiding and positioning mechanism is arranged at the upper position of the shifting fork body and is in guiding fit with a guiding assembly arranged on the gearbox. A power connecting mechanism is arranged in the middle of the shifting fork body and used for being connected with a power assembly, and the shifting fork body is driven to move through the power assembly. A stress mechanism is arranged at the lower position of the shifting fork body and used for driving the sliding gear to move. Positioning and guiding are added on the shifting fork, and the shifting fork has the advantages of being good in guiding stress, stable in operation in the guiding process, long in service life and low in maintenance cost.

Description

Technical Field

[0001] This utility model relates to gearbox technology and facilities, specifically to a novel shift fork structure. Background Technology

[0002] In the transportation of bridges during road and bridge construction in my country, due to the heavy weight of bridges, mostly ranging from 160 to 300 tons, the beam transport equipment needs to be equipped with a high-horsepower engine. However, during bridge erection, in order to meet the requirements of beam erection and feeding, the operating speed during the beam erection process is relatively slow. When the beam transport equipment returns empty, it needs to change direction. This requires the beam transport equipment to have a large reduction speed, a large gear diameter, and a gear shifting function.

[0003] Ordinary gearboxes have smaller gear diameters, and the distance between the force-bearing part of the shift fork and the point of force application is relatively short. Existing automotive gearbox shift forks are generally made of forged parts, which meet the required strength and toughness. However, the gearbox gears on beam-transporting equipment have larger diameters, making it impossible to reuse existing shift forks. Using custom-made ordinary forged shift forks would be expensive, result in a bulky overall structure, and leave the force-bearing point too far from the shift point, leading to poor shifting force. A welded shift fork structure is typically used, which shortens the distance between the force-bearing point and the shift point. This structure provides a closer distance between the force-bearing point and the shift point, resulting in better shifting force. However, this structure lacks overall guidance and positioning, leading to poor stability during use.

[0004] like Figure 1 The diagram shows the structure of an existing large gear shift fork. In the diagram: 1-shift fork body, 3-pull rod sleeve, 5-pull rod, 6-gearbox housing, 7-pull rod positioning sleeve. This shift fork structure lacks guidance during operation, relying solely on the pull rod positioning sleeve 7 for localized, single-point guidance, resulting in poor operational stability. Utility Model Content

[0005] To address the problems in the prior art, this invention provides a novel shift fork structure, which incorporates a positioning guide on the shift fork, resulting in advantages such as good guiding force and smooth operation during the guiding process.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A novel shift fork structure includes a shift fork body;

[0008] A guide positioning mechanism is provided at the upper part of the shift fork body, and the guide positioning mechanism and the guide component provided on the gearbox form a guide engagement;

[0009] A power connection mechanism is provided in the middle of the shift fork body. The power connection mechanism is used to connect with the power component, which drives the shift fork body to move.

[0010] A force-bearing mechanism is located at the lower part of the shift fork body, which is used to drive the sliding gear.

[0011] Furthermore, the guiding and positioning mechanism is a guiding and positioning sleeve, which vertically penetrates the shift fork body. The guiding component is a shift fork guide rod that is linearly set and fixed on the gearbox. The guiding and positioning sleeve is slidably sleeved on the shift fork guide rod to form a guiding fit.

[0012] Furthermore, the guide positioning sleeve is welded and fixed to the corresponding opening position of the shift fork body.

[0013] Furthermore, the power connection mechanism is a pull rod sleeve that is vertically fixed to one side of the shift fork body, and the power component is a pull rod that is parallel to the shift fork guide rod. One end of the pull rod is fixedly connected to the pull rod sleeve, and the other end of the pull rod passes through the gearbox housing and is connected to the power source.

[0014] Furthermore, the pull rod sleeve is welded and fixed to the shift fork body.

[0015] Furthermore, a tie rod positioning sleeve is provided on the gearbox housing at a position corresponding to the tie rod, and the tie rod slides through the tie rod positioning sleeve to form a guiding fit.

[0016] Furthermore, the pull rod is threadedly connected to the pull rod sleeve.

[0017] Furthermore, the power source is a hydraulic cylinder.

[0018] Furthermore, the force-bearing mechanism is an annular shift fork fixed on the shift fork body, and the annular shift fork is positioned around the outer annular groove of the sliding gear.

[0019] Furthermore, the annular shift fork is welded and fixed to the other side of the shift fork body, and the two are arranged in parallel.

[0020] The beneficial effects of this utility model are:

[0021] This invention adds a positioning guide to the shift fork, which has the advantages of good guiding force, smooth operation during the guiding process, long service life, and low maintenance cost.

[0022] In this invention, the guide positioning sleeve and the shift fork guide rod form the first guide engagement, and the pull rod and the pull rod positioning sleeve form the second guide engagement. Through the two guide engagements, the operational stability during operation is greatly improved.

[0023] In this utility model, the guide positioning sleeve, the pull rod positioning sleeve, the annular shift fork, and the shift fork body are welded together as one unit, which results in low manufacturing cost and convenient maintenance. Attached Figure Description

[0024] Figure 1Here is a structural diagram of the existing large gear shift fork;

[0025] Figure 2 This is a schematic diagram of the structure of this utility model;

[0026] Figure 3 for Figure 2 Side view;

[0027] Figure 4 This is a schematic diagram of the installation of this utility model.

[0028] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0030] like Figures 2 to 4 As shown, this embodiment provides a novel shift fork structure, including a shift fork body 1. A guide positioning mechanism is provided at the upper position of the shift fork body 1, forming a guide engagement with a guide component mounted on the gearbox. A power connection mechanism is provided at the middle position of the shift fork body 1, which connects to a power component to drive the shift fork body. A force-receiving mechanism is provided at the lower position of the shift fork body 1, which is used to actuate the sliding gear.

[0031] During operation, the guide positioning mechanism serves as the positioning point of the shift fork, the power connection mechanism serves as the power point of the shift fork, and the force-bearing mechanism serves as the force-bearing point of the shift fork.

[0032] Specifically, the guiding and positioning mechanism is a guiding and positioning sleeve 2, which vertically penetrates the shift fork body 1. The guiding component is a shift fork guide rod 8 that is linearly set and fixed on the gearbox. The guiding and positioning sleeve 2 is slidably sleeved on the shift fork guide rod 8 to form a guiding fit.

[0033] Specifically, the power connection mechanism is a pull rod sleeve 3 vertically fixed to one side of the shift fork body 1, and the power component is a pull rod 5 arranged parallel to the shift fork guide rod 8. One end of the pull rod 5 is threadedly connected to the pull rod sleeve, and the other end of the pull rod passes through the gearbox housing 6 and is connected to the power source. The power source can be a hydraulic cylinder, etc.

[0034] In this embodiment, a tie rod positioning sleeve 7 is provided on the gearbox housing 6 at a position corresponding to the tie rod 5, and the tie rod 5 slides through the tie rod positioning sleeve 7 to form a guiding fit.

[0035] Specifically, the force-bearing mechanism is an annular shift fork 4 that is fixed parallel to the other side of the shift fork body 1. The annular shift fork 4 is positioned around the outer annular groove of the sliding gear.

[0036] In the processing of this utility model, the guide positioning sleeve 2 is welded and fixed to the corresponding opening position of the shift fork body 1, the pull rod sleeve 3 is welded and fixed to one side of the shift fork body 1, and the annular shift fork 4 is welded and fixed to the other side of the shift fork body 1.

[0037] With the above-mentioned design, the shift fork structure of this utility model has two guiding connections, which greatly improves the operational stability during operation. It has the advantages of good guiding force, smooth operation during the guiding process, long service life, and low maintenance cost.

[0038] In operation, this utility model is driven by a hydraulic cylinder, with the shift fork guide rod 8 as the positioning direction. The pull rod 5 drives the shift fork structure to make linear motion, which drives the sliding gear to move, so as to realize the meshing and rotation of different gears and achieve the shifting function.

[0039] This utility model is mainly used in gearboxes for beam transport equipment (with a large reduction ratio and a large gear diameter), but it can also be used in gearboxes in other fields.

[0040] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

[0041] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0042] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A new shift fork structure, characterized by: The shifter body is provided with a guide positioning mechanism at the upper position of the shifter body, the guide positioning mechanism and a guide assembly provided on the gearbox form a guide cooperation; The shifter body is provided with a power connection mechanism at the middle position of the shifter body, the power connection mechanism is used for connecting with a power assembly, and the shifter body is driven to move through the power assembly; The shifter body is provided with a stress mechanism at the lower position of the shifter body, the stress mechanism is used for driving the sliding gear to move. The guide positioning mechanism is a guide positioning sleeve, the guide positioning sleeve vertically penetrates the shifter body, the guide assembly is a shifter guide rod which is linearly arranged and fixed on the gearbox, and the guide positioning sleeve is slidably sleeved on the shifter guide rod to form the guide cooperation.

2. The novel fork structure according to claim 1, characterized in that: The guide positioning sleeve is welded and fixed at the corresponding opening position of the shifter body.

3. The novel fork structure according to claim 2, characterized in that: The power connection mechanism is a pull rod sleeve which is vertically fixed on one side surface of the shifter body, and the power assembly is a pull rod which is parallelly arranged with the shifter guide rod, one end of the pull rod is fixedly connected with the pull rod sleeve, and the other end of the pull rod penetrates the gearbox body and is connected with a power source.

4. The novel fork structure according to claim 2, wherein: The pull rod sleeve is welded and fixed on the shifter body.

5. The novel fork structure according to claim 4, characterized in that: The gearbox body is provided with a pull rod positioning sleeve at a position corresponding to the pull rod, and the pull rod is slidably penetrated through the pull rod positioning sleeve to form the guide cooperation.

6. The novel fork structure according to claim 4, wherein: The pull rod is threadedly connected with the pull rod sleeve.

7. The novel fork structure according to claim 4, wherein: The power source is a hydraulic cylinder.

8. The novel fork structure according to claim 4, wherein: The stress mechanism is an annular shifter which is fixed on the shifter body, and the annular shifter is clamped in the outer ring groove of the sliding gear.

9. The novel fork structure according to any one of claims 2-8, characterized in that: The annular shifter is welded and fixed on the other side surface of the shifter body, and the two are parallelly arranged.

10. The novel fork structure according to claim 9, characterized in that: ​

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