Oil sprayer pulling-out device

Abstract

The utility model belongs to the technical field of maintenance tools, and particularly discloses an oil sprayer pulling-out device. The device mainly comprises a support, a lead screw, an oil sprayer connecting bolt and the like. A mounting hole is formed in the center of the bracket; an outer ring of the thrust bearing is connected in the mounting hole; a bearing nut is arranged on the lead screw, the lower portion of the bearing nut is arranged in the center of the thrust bearing, and the upper portion of the bearing nut is located above the mounting hole of the support. The bottom end of the lead screw penetrates through the mounting hole and the thrust bearing, and the bottom end of the lead screw is connected with the oil sprayer through a specially-made oil sprayer connecting bolt. The supporting legs of the support are erected on the fuel injector pressing bolts on the cylinder cover, the fuel injector connecting bolts are connected with the fuel injector, and the fuel injector is slowly pulled out of the cylinder cover through relative movement of the lead screw and the bearing nut, so that damage to the cylinder cover and the fuel injector caused by violent disassembly is avoided; and meanwhile, the damage to the body of the maintenance personnel caused by repeated collision and knocking can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance tooling, in particular to an injector pulling device. Background Art

[0002] When an injector is installed on a diesel engine cylinder head, a copper gasket is installed to prevent the oil on the upper part of the cylinder head from seeping down. However, after a long time of gas detonation and high temperature, the sealing performance of the gasket will be damaged, resulting in the oil on the upper part of the cylinder head seeping down, and a large amount of firm carbon deposits and dirt are generated due to the high-temperature anaerobic consolidation of the lubricating oil, making it extremely difficult to pull out the injector.

[0003] During the operation process, it takes a lot of time to solve the above injector faults. It is often necessary to use the existing ram-type puller to operate more than a hundred times to pull it out. Moreover, the vibration generated by the collision and knocking during the violent disassembly process is very large, resulting in damage to the injector or the cylinder head, causing unnecessary economic losses, affecting the work process and work efficiency, and also causing certain harm to the physical health of maintenance personnel; at the same time, due to the existence of the cooling water pipeline above the injector, it will also affect the disassembly and pulling process of the injector.

[0004] Therefore, the utility model provides an injector pulling device. Content of the Utility Model

[0005] The purpose of the utility model is to provide an injector pulling device, which can solve the problem of difficult disassembly of the injector and effectively improve the efficiency of disassembly and pulling out of the injector.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An injector pulling device includes a bracket, a lead screw and an injector connecting bolt;

[0008] An installation hole is provided at the central position of the bracket, and a thrust bearing is arranged in the installation hole;

[0009] A bearing nut is arranged on the lead screw, the lower part of the bearing nut is located at the central position of the thrust bearing, and the upper part of the bearing nut is located above the installation hole of the bracket;

[0010] The bottom end of the lead screw passes through the installation hole and the thrust bearing, and the bottom end of the lead screw is connected to the injector through the injector connecting bolt.

[0011] Preferably, connection holes are provided on both the lead screw and the injector connecting bolt, and the lead screw and the injector connecting bolt are connected through a lead screw-injector pin passing through the connection holes.

[0012] Preferably, the thrust bearing is a single-row tapered roller bearing.

[0013] Preferably, there is a clearance fit between the outer ring of the thrust bearing and the mounting hole of the bracket, and an interference fit between the inner ring of the thrust bearing and the bearing nut.

[0014] Preferably, the outer ring of the thrust bearing is fixed by welding to the mounting hole.

[0015] Preferably, the mounting hole has an inverted convex-shaped structure, wherein the radius of the upper opening of the mounting hole is greater than the radius of the lower opening of the mounting hole.

[0016] Preferably, the thrust bearing is arranged at the upper part of the mounting hole.

[0017] Preferably, the lead screw is a single-start trapezoidal lead screw with a single-thread.

[0018] Preferably, a regular quadrilateral square hole is provided at the center of the top of the lead screw.

[0019] Preferably, the lead screw and the bearing nut are made of carbon steel.

[0020] The beneficial effects of the present utility model are as follows:

[0021] The present utility model provides an injector extraction device. By placing the support legs of the bracket on the cylinder head, connecting the injector connection bolt provided at the bottom end of the lead screw to the injector, and then realizing the slow extraction of the injector from the cylinder head through the relative movement between the lead screw and the bearing nut, damage to the cylinder head and the injector caused by violent disassembly is avoided, the service life is prolonged, and at the same time, the harm to the maintenance personnel's body caused by repeated collision and knocking can be avoided, and the work efficiency is effectively improved;

[0022] By adding a thrust bearing in the mounting hole of the bracket, the eccentric self-correction during the extraction of the injector can be completed. At the same time, the thrust bearing has a high axial load-bearing capacity, which can effectively reduce the friction force generated by excessive tensile load and relatively prolong the service life of the tool; by machining the upper half of the bearing nut into a regular hexagon structure and providing a regular quadrilateral square hole at the center of the top of the lead screw, it is convenient to match portable electric tools such as electric triggers, which can effectively improve the work efficiency and reduce the labor intensity of the maintenance personnel; the bottom end of the lead screw is connected to the injector connection bolt through a hinged connection method to realize the relative swing of the lead screw, which can avoid the obstruction of the cooling water pipeline above the lead screw, thus ensuring the smooth disassembly of the injector;

[0023] The injector extraction device of the present utility model has a simple structure, low cost, is relatively convenient to pick up and use, and is relatively convenient for later maintenance or replacement of accessories, and has high practicability. Description of the Drawings

[0024] Figure 1 It is the overall assembly schematic diagram of the present utility model;

[0025] Figure 2 It is the assembly schematic diagram of the bracket, thrust bearing and bearing nut of the present utility model;

[0026] Figure 3 It is the assembly schematic diagram of the lead screw, bearing nut, injector connecting bolt and lead screw injector pin of the present utility model;

[0027] Figure 4 It is the top view of the bracket of the present utility model;

[0028] Figure 5 It is the cross-sectional view of the thrust bearing of the present utility model;

[0029] Figure 6 It is the top view of the bearing nut of the present utility model;

[0030] Figure 7 It is the top view of the lead screw of the present utility model;

[0031] Figure 8 It is the schematic diagram of the relative position relationship between the injector extraction device and the cooling water pipeline of the present utility model;

[0032] Wherein, a1 - cooling water pipeline, a2 - triangular flange;

[0033] b - injector placement hole;

[0034] 1 - cylinder head, 2 - injector, 3 - bracket, 4 - bearing nut;

[0035] 5 - lead screw, 6 - thrust bearing, 7 - lead screw injector pin, 8 - injector connecting bolt. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0037] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] Combined with Figures 1 to 8 As shown, the present utility model proposes an injector pulling device. This injector pulling device can slowly pull out the injector 2 from the cylinder head 1 through the relative movement of the lead screw 5 and the bearing nut 4, avoiding the damage caused to the injector 2 and the cylinder head 1 by violent disassembly, relatively extending the service life, effectively improving the work efficiency, and also being able to avoid the harm caused to the maintenance personnel's body by repeated collisions and knocks during the violent disassembly process. At the same time, using this injector pulling device can avoid the blockage of the cooling water pipeline above the lead screw, thereby ensuring the smooth disassembly of the injector, and having high practicability.

[0039] Combined with Figure 1 As shown, this injector pulling device mainly includes structural components such as a bracket 3, a lead screw 5, and an injector connecting bolt 8. Among them, support legs 31 are provided on both sides of the bracket 3. When pulling out the injector 2 through this device, the support legs 31 can abut against the injector pressing bolt at the top of the cylinder head 1, providing better support force for the device. At the same time, a reinforcing bottom plate 32 is provided at the end of the support legs 31, and anti-slip protrusions are provided at the bottom of the reinforcing bottom plate 32. By adding this reinforcing bottom plate 32, the contact area with the cylinder head 1 can be relatively increased, providing good and stable support for this injector pulling device. At the same time, the anti-slip protrusions can increase the friction between the bracket 3 and the cylinder head 1, providing favorable conditions for the subsequent pulling out of the injector 2.

[0040] Combined with Figure 1 , Figure 2 and Figure 4 As shown, an installation hole is opened at the center position of the bracket 3. The installation hole has an inverted convex-shaped structure. Among them, the radius of the upper opening of the installation hole is larger than the radius of the lower opening of the installation hole. A thrust bearing 6 is provided in the installation hole. Among them, the thrust bearing 6 is provided in the upper part of the installation hole, and the outer ring of the thrust bearing 6 and the installation hole are in clearance fit, and the two are fixed by welding with installation parts. After surfacing with a structural steel basic electrode and then tempering at 350 °C.

[0041] Combined with Figure 5 As shown, the thrust bearing 6 uses a single-row tapered roller bearing. This single-row tapered roller bearing has the ability to bear axial loads. At the same time, the structural principle of the tapered roller thrust bearing can complete the eccentricity correction during the pulling out process of the injector 2, thereby reducing the possible eccentric sidewall friction problem to ensure the smooth progress of the pulling out process, effectively reducing the friction force generated by excessive tensile load, and thus being able to relatively extend the service life of the tool.

[0042] Combined with Figure 1 , Figure 3 and Figure 7As shown in the figure, the lead screw 5 adopts a single-start trapezoidal lead screw with a single-thread, and at the same time, a regular quadrilateral square hole is opened at the center of the top of the lead screw 5, which is convenient for adapting to the operation of the charging portable electric trigger, and can effectively improve the working efficiency of maintenance and disassembly. Due to the relatively narrow working space, it is difficult to apply force when using the ram extractor, and the operation is extremely inconvenient. At the same time, the fitting clearance between the fuel injector 2 and the installation hole of the cylinder head 1 is small, and the required pulling force is large. It is time-consuming and laborious to rely on manual collision and knocking to extract the fuel injector 2. Therefore, using this new type of fuel injector extraction device in combination with portable electric tools such as electric triggers can effectively improve the operation efficiency.

[0043] Combined with Figure 3 As shown in the figure, a bearing nut 4 is arranged on the lead screw 5. The lower part of the bearing nut 4 is arranged at the central position of the thrust bearing 6, and the upper part of the bearing nut 4 is located above the installation hole of the bracket 3. Among them, there is an interference fit of 0.03 mm between the inner ring of the thrust bearing 6 and the bearing nut 4. Both the lead screw 5 and the bearing nut 4 are made of carbon steel, meeting the usage requirements.

[0044] Combined with Figure 1 and Figure 3 As shown in the figure, the bottom end of the lead screw 5 passes through the installation hole and the center of the thrust bearing 6, and the bottom end of the lead screw 5 is connected to the fuel injector 2 through the fuel injector connecting bolt 8. The fuel injector connecting bolt 8 is made of Mn13 and is relatively strong and durable. Among them, connection holes are opened at the relative positions of the bottom end of the lead screw 5 and the fuel injector connecting bolt 8. The lead screw 5 and the fuel injector connecting bolt 8 are connected through the lead screw fuel injector pin 7 passing through the connection hole. By means of the hinge realized by the lead screw fuel injector pin 7, the relative swing between the lead screw 5 and the fuel injector connecting bolt 8 can be achieved.

[0045] Combined with Figure 1 、 Figure 3 and Figure 8 As shown in the figure, the lead screw fuel injector pin 7 is a protective part for the pulling force of the lead screw 5. The material, diameter of the lead screw fuel injector pin 7 are selected through calculation and experiment and appropriate heat treatment is carried out. Once the fuel injector 2 is stuck and exceeds the maximum yield strength designed for the lead screw 5 and the bracket 3, the lead screw fuel injector pin 7 will break due to reaching the shear stress, which can avoid permanent damage to the device due to overload and protect the personal safety of the operator. At the same time, combined with Figure 8As shown, since the cylinder head 1 is provided with an inclined cooling water pipeline a1, and the cooling water pipeline a1 is connected by a triangular flange a2, and the triangular flange a2 is just arranged above the injector placement hole b, when the injector 2 is pulled out about 25mm above the injector placement hole b, the outer edge of the triangular flange a2 will hinder the upward movement of the lead screw 5, making it impossible to remove the injector 2. The lead screw injector pin 7 is provided to not only protect the lead screw 5 and the bracket 3, but also the lead screw 5 and the injector connection bolt 8 are connected in a hinged manner, so that the lead screw 5 can swing at a suitable angle, thereby avoiding the obstruction of the outer edge of the triangular flange a2 of the cooling water pipeline a1, and the injector 2 can be smoothly removed in this specific position.

[0046] The operation process of the utility model is as follows:

[0047] First, the bracket 3 is pressed against the cylinder head 1, and the bearing nut 4 is rotated by "electric or manual means", and the lead screw 5 drives the injector 2 to move upward. At this time, the bearing nut 4 does not leave the mounting hole, and the inner ring of the thrust bearing 6 and the outer ring of the thrust bearing 6 do not separate;

[0048] Secondly, when the injector 2 is pulled up to 25mm above the injector placement hole b, the main clamping force disappears (due to the structural characteristics of the injector 2 being thick at the upper part and thin at the lower part, when the upper part of the injector 2 is separated from the injector placement hole b, the main clamping force disappears and it can be directly pulled out). However, at this time, the top end of the screw 5 is close to the triangular flange a2, and the screw 5 cannot be directly pulled out vertically;

[0049] Finally, the screw 5 is pulled obliquely, that is, the screw 5 is pulled toward the user's body. At this time, the bearing nut 4 drives the inner ring of the thrust bearing 6 to leave the outer ring of the thrust bearing 6, that is, it is separated from the mounting hole. At the same time, since the injector connecting bolt 8 is hinged to the screw 5 through the screw injector pin 7, the screw 5 can swing relative to the injector connecting bolt 8. The oblique pulling of the screw 5 can finally realize the removal of the injector 2 from the cylinder head 1 while "avoiding the cooling water pipeline a1 and the triangular flange a2".

[0050] Combination Figures 1 to 8As shown in the figure, the present utility model provides an injector extraction device. The support legs 31 of the bracket 3 are placed on the cylinder head 1. The injector connecting bolt 8 is connected to the injector 2. Through the relative movement of the lead screw 5 and the bearing nut 4, a suitable tensile force is continuously applied to the injector 2, and diesel, kerosene mixture, etc. are injected drop by drop as needed, so that the injector 2 can be slowly pulled out from the cylinder head 1, avoiding damage to the cylinder head 1 and the injector 2 caused by violent disassembly, extending the service life, and at the same time avoiding the harm to the maintenance personnel's body caused by collision and knocking, improving the work efficiency. At the same time, by adding a thrust bearing 6 in the mounting hole of the bracket 3, the eccentricity correction of the injector 2 during the extraction process can be completed. At the same time, the thrust bearing has the ability to bear axial loads, which can effectively reduce the friction generated by excessive tensile loads and relatively extend the service life of the tool. By machining the upper half of the bearing nut 4 into a regular hexagon and opening a regular quadrilateral square hole at the center of the top of the lead screw 5, it is convenient to match the rechargeable portable electric tool, which can effectively improve the work efficiency and reduce the labor intensity of the maintenance personnel. The injector extraction device of the present utility model has a simple structure, low cost, and is relatively convenient for later maintenance or replacement of accessories, and has high practicability.

[0051] Of course, the above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made by using the description and drawings of the present utility model under the inventive concept of the present utility model, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model and should be protected by the present utility model.

Claims

1. An injector extraction device, characterized in that, It includes a bracket, a lead screw, and an injector connection bolt; An installation hole is provided at the center position of the bracket, and a thrust bearing is arranged in the installation hole; A bearing nut is arranged on the lead screw, the lower part of the bearing nut is arranged at the center position of the thrust bearing, and the upper part of the bearing nut is located above the installation hole of the bracket; The bottom end of the lead screw passes through the installation hole and the thrust bearing, and the bottom end of the lead screw is connected to the injector through the injector connection bolt.

2. The injector extraction device according to claim 1, characterized in that, Connection holes are provided on both the lead screw and the injector connection bolt, and the lead screw and the injector connection bolt are connected by a lead screw injector pin passing through the connection holes.

3. The injector extraction device according to claim 1, wherein, The thrust bearing adopts a single-row tapered roller bearing.

4. The injector extraction device according to claim 3, characterized in that, A clearance fit is provided between the outer ring of the thrust bearing and the installation hole of the bracket, and an interference fit is provided between the inner ring of the thrust bearing and the bearing nut.

5. An injector extraction device according to claim 4, characterized in that, The outer ring of the thrust bearing is fixed by welding to the installation hole.

6. The injector extraction device according to claim 1, wherein, The installation hole has an inverted convex-shaped structure, wherein the opening radius of the upper part of the installation hole is larger than the opening radius of the lower part of the installation hole.

7. An injector extraction device according to claim 6, characterized in that, The thrust bearing is arranged in the upper part of the installation hole.

8. An injector extraction device according to claim 1, characterized in that, The lead screw adopts a single-start trapezoidal lead screw with a single-direction thread.

9. The injector extraction device according to claim 8, wherein, A regular quadrilateral square hole is provided at the center of the top of the lead screw.

10. The injector extraction device according to claim 1, wherein, Both the lead screw and the bearing nut are made of carbon steel.

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